Subject: Re: [PATCH v2] usb: gadget: udc: fix race condition in usb_del_gadget
From: Alan Stern <[email-masked]>
To: Jimmy Hu <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked]
Date: Tue, 14 Oct 2025 10:38:53 -0400
List-Id: <stable.vger.kernel.org>

On Tue, Oct 14, 2025 at 08:51:56AM +0000, Jimmy Hu wrote:
> A race condition during gadget teardown can lead to a use-after-free
> in usb_gadget_state_work(), as reported by KASAN:
> 
>   BUG: KASAN: invalid-access in sysfs_notify+0_x_2c/0_x_d0
>   Workqueue: events usb_gadget_state_work
> 
> The fundamental race occurs because a concurrent event (e.g., an
> interrupt) can call usb_gadget_set_state() and schedule gadget->work
> at any time during the cleanup process in usb_del_gadget().
> 
> Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after
> device removal") attempted to fix this by moving flush_work() to after
> device_del(). However, this does not fully solve the race, as a new
> work item can still be scheduled *after* flush_work() completes but
> before the gadget's memory is freed, leading to the same use-after-free.
> 
> This patch fixes the race condition robustly by introducing a 'teardown'
> flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is
> set during cleanup in usb_del_gadget() *before* calling flush_work() to
> prevent any new work from being scheduled once cleanup has commenced.
> The scheduling site, usb_gadget_set_state(), now checks this flag under
> the lock before queueing the work, thus safely closing the race window.
> 
> Changes in v2:
>   - Removed redundant inline comments as suggested by Alan Stern.
> 
> Fixes: 5702f75375aa9 ("usb: gadget: udc-core: move sysfs_notify() to a workqueue")
> Signed-off-by: Jimmy Hu <[email-masked]>
> Cc: [email-masked]
> ---

Reviewed-by: Alan Stern <[email-masked]>

>  drivers/usb/gadget/udc/core.c | 17 ++++++++++++++++-
>  include/linux/usb/gadget.h    |  5 +++++
>  2 files changed, 21 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index d709e24c1fd4..66d2428835da 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c
> @@ -1123,8 +1123,13 @@ static void usb_gadget_state_work(struct work_struct *work)
>  void usb_gadget_set_state(struct usb_gadget *gadget,
>  		enum usb_device_state state)
>  {
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&gadget->state_lock, flags);
>  	gadget->state = state;
> -	schedule_work(&gadget->work);
> +	if (!gadget->teardown)
> +		schedule_work(&gadget->work);
> +	spin_unlock_irqrestore(&gadget->state_lock, flags);
>  }
>  EXPORT_SYMBOL_GPL(usb_gadget_set_state);
>  
> @@ -1357,6 +1362,8 @@ static void usb_udc_nop_release(struct device *dev)
>  void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
>  		void (*release)(struct device *dev))
>  {
> +	spin_lock_init(&gadget->state_lock);
> +	gadget->teardown = false;
>  	INIT_WORK(&gadget->work, usb_gadget_state_work);
>  	gadget->dev.parent = parent;
>  
> @@ -1531,6 +1538,7 @@ EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
>  void usb_del_gadget(struct usb_gadget *gadget)
>  {
>  	struct usb_udc *udc = gadget->udc;
> +	unsigned long flags;
>  
>  	if (!udc)
>  		return;
> @@ -1544,6 +1552,13 @@ void usb_del_gadget(struct usb_gadget *gadget)
>  	kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
>  	sysfs_remove_link(&udc->dev.kobj, "gadget");
>  	device_del(&gadget->dev);
> +	/*
> +	 * Set the teardown flag before flushing the work to prevent new work
> +	 * from being scheduled while we are cleaning up.
> +	 */
> +	spin_lock_irqsave(&gadget->state_lock, flags);
> +	gadget->teardown = true;
> +	spin_unlock_irqrestore(&gadget->state_lock, flags);
>  	flush_work(&gadget->work);
>  	ida_free(&gadget_id_numbers, gadget->id_number);
>  	cancel_work_sync(&udc->vbus_work);
> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> index 0f28c5512fcb..8b5e593f7966 100644
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h
> @@ -351,6 +351,9 @@ struct usb_gadget_ops {
>   *	can handle. The UDC must support this and all slower speeds and lower
>   *	number of lanes.
>   * @state: the state we are now (attached, suspended, configured, etc)
> + * @state_lock: Spinlock protecting the `state` and `teardown` members.
> + * @teardown: True if the device is undergoing teardown, used to prevent
> + *	new work from being scheduled during cleanup.
>   * @name: Identifies the controller hardware type.  Used in diagnostics
>   *	and sometimes configuration.
>   * @dev: Driver model state for this abstract device.
> @@ -426,6 +429,8 @@ struct usb_gadget {
>  	enum usb_ssp_rate		max_ssp_rate;
>  
>  	enum usb_device_state		state;
> +	spinlock_t			state_lock;
> +	bool				teardown;
>  	const char			*name;
>  	struct device			dev;
>  	unsigned			isoch_delay;
> -- 
> 2.51.0.760.g7b8bcc2412-goog
> 

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From: Eric Dumazet <[email-masked]>
Date: Tue, 14 Oct 2025 07:39:59 -0700
Subject: Re: [PATCH net] gve: Check valid ts bit on RX descriptor before hw timestamping
To: Harshitha Ramamurthy <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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On Mon, Oct 13, 2025 at 5:47=E2=80=AFPM Harshitha Ramamurthy
<[email-masked]> wrote:
>
> From: Tim Hostetler <[email-masked]>
>
> The device returns a valid bit in the LSB of the low timestamp byte in
> the completion descriptor that the driver should check before
> setting the SKB's hardware timestamp. If the timestamp is not valid, do n=
ot
> hardware timestamp the SKB.
>
> Cc: [email-masked]
> Fixes: b2c7aeb49056 ("gve: Implement ndo_hwtstamp_get/set for RX timestam=
ping")
> Reviewed-by: Joshua Washington <[email-masked]>
> Signed-off-by: Tim Hostetler <[email-masked]>
> Signed-off-by: Harshitha Ramamurthy <[email-masked]>
> ---
>  drivers/net/ethernet/google/gve/gve.h          |  2 ++
>  drivers/net/ethernet/google/gve/gve_desc_dqo.h |  3 ++-
>  drivers/net/ethernet/google/gve/gve_rx_dqo.c   | 18 ++++++++++++------
>  3 files changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet=
/google/gve/gve.h
> index bceaf9b05cb4..4cc6dcbfd367 100644
> --- a/drivers/net/ethernet/google/gve/gve.h
> +++ b/drivers/net/ethernet/google/gve/gve.h
> @@ -100,6 +100,8 @@
>   */
>  #define GVE_DQO_QPL_ONDEMAND_ALLOC_THRESHOLD 96
>
> +#define GVE_DQO_RX_HWTSTAMP_VALID 0x1
> +
>  /* Each slot in the desc ring has a 1:1 mapping to a slot in the data ri=
ng */
>  struct gve_rx_desc_queue {
>         struct gve_rx_desc *desc_ring; /* the descriptor ring */
> diff --git a/drivers/net/ethernet/google/gve/gve_desc_dqo.h b/drivers/net=
/ethernet/google/gve/gve_desc_dqo.h
> index d17da841b5a0..f7786b03c744 100644
> --- a/drivers/net/ethernet/google/gve/gve_desc_dqo.h
> +++ b/drivers/net/ethernet/google/gve/gve_desc_dqo.h
> @@ -236,7 +236,8 @@ struct gve_rx_compl_desc_dqo {
>
>         u8 status_error1;
>
> -       __le16 reserved5;
> +       u8 reserved5;
> +       u8 ts_sub_nsecs_low;
>         __le16 buf_id; /* Buffer ID which was sent on the buffer queue. *=
/
>
>         union {
> diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/e=
thernet/google/gve/gve_rx_dqo.c
> index 7380c2b7a2d8..02e25be8a50d 100644
> --- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c
> +++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
> @@ -456,14 +456,20 @@ static void gve_rx_skb_hash(struct sk_buff *skb,
>   * Note that this means if the time delta between packet reception and t=
he last
>   * clock read is greater than ~2 seconds, this will provide invalid resu=
lts.
>   */
> -static void gve_rx_skb_hwtstamp(struct gve_rx_ring *rx, u32 hwts)
> +static void gve_rx_skb_hwtstamp(struct gve_rx_ring *rx,
> +                               const struct gve_rx_compl_desc_dqo *desc)
>  {
>         u64 last_read =3D READ_ONCE(rx->gve->last_sync_nic_counter);
>         struct sk_buff *skb =3D rx->ctx.skb_head;
> -       u32 low =3D (u32)last_read;
> -       s32 diff =3D hwts - low;
> -
> -       skb_hwtstamps(skb)->hwtstamp =3D ns_to_ktime(last_read + diff);
> +       u32 ts, low;
> +       s32 diff;
> +
> +       if (desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID) {
> +               ts =3D le32_to_cpu(desc->ts);
> +               low =3D (u32)last_read;
> +               diff =3D ts - low;
> +               skb_hwtstamps(skb)->hwtstamp =3D ns_to_ktime(last_read + =
diff);
> +       }

If (desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID) can vary among
all packets received on this queue,
I will suggest you add an

        else {
                 skb_hwtstamps(skb)->hwtstamp =3D 0;
        }

This is because napi_reuse_skb() does not currently clear this field.

So if a prior skb had hwtstamp set to a timestamp, then merged in GRO,
and recycled, we have the risk of reusing an old timestamp
if GVE_DQO_RX_HWTSTAMP_VALID is unset.

We could also handle this generically, at the cost of one extra
instruction in the fast path.

>  }
>
>  static void gve_rx_free_skb(struct napi_struct *napi, struct gve_rx_ring=
 *rx)
> @@ -919,7 +925,7 @@ static int gve_rx_complete_skb(struct gve_rx_ring *rx=
, struct napi_struct *napi,
>                 gve_rx_skb_csum(rx->ctx.skb_head, desc, ptype);
>
>         if (rx->gve->ts_config.rx_filter =3D=3D HWTSTAMP_FILTER_ALL)
> -               gve_rx_skb_hwtstamp(rx, le32_to_cpu(desc->ts));
> +               gve_rx_skb_hwtstamp(rx, desc);
>
>         /* RSC packets must set gso_size otherwise the TCP stack will com=
plain
>          * that packets are larger than MTU.
> --
> 2.51.0.740.g6adb054d12-goog
>

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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 19:38:01 +0530
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
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On Tue, 14 Oct 2025 at 16:56, Naresh Kamboju <[email-masked]> wrote:
>
> On Mon, 13 Oct 2025 at 20:38, Greg Kroah-Hartman
> <[email-masked]> wrote:
> >
> > This is the start of the stable review cycle for the 6.12.53 release.
> > There are 262 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> > or in the git tree and branch at:
> >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
>
> The S390 defconfig builds failed on the Linux stable-rc 6.12.53-rc1
> and 6.6.112-rc1 tag build due to following build warnings / errors
> with gcc and clang toolchains.
>
> Also seen on 6.6.112-rc1.
>
> * s390, build
>   - clang-21-defconfig
>   - clang-nightly-defconfig
>   - clang-nightly-lkftconfig-hardening
>   - clang-nightly-lkftconfig-lto-full
>   - clang-nightly-lkftconfig-lto-thing
>   - gcc-14-allmodconfig
>   - gcc-14-defconfig
>   - gcc-14-lkftconfig-hardening
>   - gcc-8-defconfig-fe40093d
>   - gcc-8-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-lto-full
>   - korg-clang-21-lkftconfig-lto-thing
>
> First seen on 6.12.53-rc1
> Good: v6.12.52
> Bad: 6.12.53-rc1 also seen on 6.6.112-rc1
>
> Regression Analysis:
> - New regression? yes
> - Reproducibility? yes
>
> Build regressions: arch/s390/net/bpf_jit_comp.c:1813:49: error:
> 'struct bpf_jit' has no member named 'frame_off'
>
> Reported-by: Linux Kernel Functional Testing <[email-masked]>
>
> # Build error
> arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
> arch/s390/net/bpf_jit_comp.c:1813:49: error: 'struct bpf_jit' has no
> member named 'frame_off'
>  1813 |                         _EMIT6(0xd203f000 | (jit->frame_off +
>       |                                                 ^~
> arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
>   211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
>       |                                                       ^~~
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
>   211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
>       |                                                       ^~~
> arch/s390/net/bpf_jit_comp.c:1814:46: note: in expansion of macro 'offsetof'
>  1814 |                                              offsetof(struct prog_frame,
>       |                                              ^~~~~~~~
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
>   212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
>       |                                                           ^~~
> arch/s390/net/bpf_jit_comp.c:1816:41: note: in expansion of macro 'offsetof'
>  1816 |                                0xf000 | offsetof(struct prog_frame,
>       |                                         ^~~~~~~~
> arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
>   212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
>       |                                                           ^~~
> arch/s390/net/bpf_jit_comp.c:2813:33: note: in expansion of macro 'offsetof'
>  2813 |                        0xf000 | offsetof(struct prog_frame,
> tail_call_cnt));
>       |                                 ^~~~~~~~
> make[5]: *** [scripts/Makefile.build:229: arch/s390/net/bpf_jit_comp.o] Error 1
>
> The git blame is pointing to,
>  $ git blame -L 1813  arch/s390/net/bpf_jit_comp.c
>    162513d7d81487 (Ilya Leoshkevich)    _EMIT6(0xd203f000 | (jit->frame_off +
>
> Commit pointing to,
>    s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
>    [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

Anders bisected reported regressions and also suggested the missing patches.

Ilya Leoshkevich,
Is it a good idea to backport / cherry pick these two patches on the
6.12 branch ?

b2268d550d20 ("s390/bpf: Centralize frame offset calculations")
e26d523edf2a ("s390/bpf: Describe the frame using a struct instead of
constants")

> ## Build
> * kernel: 6.12.53-rc1
> * git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> * git commit: 7e50c0945b4ab1d4019f9905f6cf5350082c6a84
> * git describe: v6.12.52-263-g7e50c0945b4a
> * test details:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.52-263-g7e50c0945b4a
>
> ## Test Regressions (compared to v6.12.50-47-gf7ad21173a19)
> * s390, build
>   - clang-21-defconfig
>   - clang-nightly-defconfig
>   - clang-nightly-lkftconfig-hardening
>   - clang-nightly-lkftconfig-lto-full
>   - clang-nightly-lkftconfig-lto-thing
>   - gcc-14-allmodconfig
>   - gcc-14-defconfig
>   - gcc-14-lkftconfig-hardening
>   - gcc-8-defconfig-fe40093d
>   - gcc-8-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-lto-full
>   - korg-clang-21-lkftconfig-lto-thing

- Naresh

From - Fri Oct 17 14:26:18 2025
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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 19:40:59 +0530
Subject: Re: [PATCH 6.1 000/196] 6.1.156-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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On Mon, 13 Oct 2025 at 20:18, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.1.156 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.1.156-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.1.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.1.156-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: b9f52894e35f79b1ab1c988d4202ddf668e35032
* git describe: v6.1.155-197-gb9f52894e35f
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y/build/v6.1.1=
55-197-gb9f52894e35f

## Test Regressions (compared to v6.1.154-74-g8a8cf3637b17)

## Metric Regressions (compared to v6.1.154-74-g8a8cf3637b17)

## Test Fixes (compared to v6.1.154-74-g8a8cf3637b17)

## Metric Fixes (compared to v6.1.154-74-g8a8cf3637b17)

## Test result summary
total: 99093, pass: 82935, fail: 2925, skip: 12977, xfail: 256

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 133 total, 132 passed, 1 failed
* arm64: 41 total, 38 passed, 3 failed
* i386: 21 total, 21 passed, 0 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 32 total, 31 passed, 1 failed
* riscv: 11 total, 10 passed, 1 failed
* s390: 14 total, 13 passed, 1 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 33 total, 32 passed, 1 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-exec
* kselftest-fpu
* kselftest-futex
* kselftest-intel_pstate
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-mincore
* kselftest-mqueue
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-sigaltstack
* kselftest-size
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

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Date: Tue, 14 Oct 2025 19:47:57 +0530
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
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Hi Greg,

On 13/10/25 20:12, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.53 release.
> There are 262 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.

No problems seen on x86_64 and aarch64 with our testing.

Tested-by: Harshit Mogalapalli <[email-masked]>

Thanks,
Harshit

From - Fri Oct 17 14:26:18 2025
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Date: Tue, 14 Oct 2025 14:58:50 +0100
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
To: Sergey Senozhatsky <[email-masked]>,
 "Rafael J. Wysocki" <[email-masked]>
Cc: "Rafael J. Wysocki" <[email-masked]>,
 Greg Kroah-Hartman <[email-masked]>,
 Artem Bityutskiy <[email-masked]>,
 Sasha Levin <[email-masked]>, Daniel Lezcano <[email-masked]>,
 [email-masked], [email-masked],
 Tomasz Figa <[email-masked]>, [email-masked]
From: Christian Loehle <[email-masked]>
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On 10/14/25 14:56, Sergey Senozhatsky wrote:
> On (25/10/14 15:47), Rafael J. Wysocki wrote:
>> On Tue, Oct 14, 2025 at 12:23 PM Sergey Senozhatsky
>> <[email-masked]> wrote:
>>>
>>>> Any details would be much appreciated.
>>>> How do the idle state usages differ with and without
>>>> "cpuidle: menu: Avoid discarding useful information"?
>>>> What do the idle states look like in your platform?
>>>
>>> Sure, I can run tests.
>>
>> Would it be possible to check if the mainline has this issue?  That
>> is, compare the benchmark results on unmodified 6.17 (say) and on 6.17
>> with commit 85975daeaa4 reverted?
> 
> I don't think mainline kernel can run on those devices (due to
> a bunch of downstream patches).  Best bet is 6.12, I guess.

Depending on what Rafael is expecting here you might just get
away with copying menu.c from mainline, the interactions to other
subsystems are limited fortunately.

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Date: Tue, 14 Oct 2025 06:59:51 -0700
Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
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SpamTally: Final spam score: 35

On 10/13/25 07:43, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.112-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

From - Fri Oct 17 14:26:18 2025
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From: "Rafael J. Wysocki" <[email-masked]>
Date: Tue, 14 Oct 2025 16:02:05 +0200
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
To: Christian Loehle <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, "Rafael J. Wysocki" <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, 
	Greg Kroah-Hartman <[email-masked]>, 
	Artem Bityutskiy <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], 
	[email-masked], Tomasz Figa <[email-masked]>, [email-masked]
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On Tue, Oct 14, 2025 at 3:59=E2=80=AFPM Christian Loehle
<[email-masked]> wrote:
>
> On 10/14/25 14:56, Sergey Senozhatsky wrote:
> > On (25/10/14 15:47), Rafael J. Wysocki wrote:
> >> On Tue, Oct 14, 2025 at 12:23=E2=80=AFPM Sergey Senozhatsky
> >> <[email-masked]> wrote:
> >>>
> >>>> Any details would be much appreciated.
> >>>> How do the idle state usages differ with and without
> >>>> "cpuidle: menu: Avoid discarding useful information"?
> >>>> What do the idle states look like in your platform?
> >>>
> >>> Sure, I can run tests.
> >>
> >> Would it be possible to check if the mainline has this issue?  That
> >> is, compare the benchmark results on unmodified 6.17 (say) and on 6.17
> >> with commit 85975daeaa4 reverted?
> >
> > I don't think mainline kernel can run on those devices (due to
> > a bunch of downstream patches).  Best bet is 6.12, I guess.
>
> Depending on what Rafael is expecting here you might just get
> away with copying menu.c from mainline, the interactions to other
> subsystems are limited fortunately.

Yeah, that'd be sufficiently close.

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Date: Tue, 14 Oct 2025 07:07:18 -0700
Subject: Re: [PATCH 6.1 000/196] 6.1.156-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
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SpamTally: Final spam score: 35

On 10/13/25 07:42, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.1.156 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.156-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 19:38:01 +0530
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], Ilya Leoshkevich <[email-masked]>, 
	Daniel Borkmann <[email-masked]>, Dan Carpenter <[email-masked]>, 
	Arnd Bergmann <[email-masked]>, Anders Roxell <[email-masked]>, 
	Ben Copeland <[email-masked]>, [email-masked], 
	Netdev <[email-masked]>, bpf <[email-masked]>
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On Tue, 14 Oct 2025 at 16:56, Naresh Kamboju <[email-masked]> wrote:
>
> On Mon, 13 Oct 2025 at 20:38, Greg Kroah-Hartman
> <[email-masked]> wrote:
> >
> > This is the start of the stable review cycle for the 6.12.53 release.
> > There are 262 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> > or in the git tree and branch at:
> >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
>
> The S390 defconfig builds failed on the Linux stable-rc 6.12.53-rc1
> and 6.6.112-rc1 tag build due to following build warnings / errors
> with gcc and clang toolchains.
>
> Also seen on 6.6.112-rc1.
>
> * s390, build
>   - clang-21-defconfig
>   - clang-nightly-defconfig
>   - clang-nightly-lkftconfig-hardening
>   - clang-nightly-lkftconfig-lto-full
>   - clang-nightly-lkftconfig-lto-thing
>   - gcc-14-allmodconfig
>   - gcc-14-defconfig
>   - gcc-14-lkftconfig-hardening
>   - gcc-8-defconfig-fe40093d
>   - gcc-8-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-lto-full
>   - korg-clang-21-lkftconfig-lto-thing
>
> First seen on 6.12.53-rc1
> Good: v6.12.52
> Bad: 6.12.53-rc1 also seen on 6.6.112-rc1
>
> Regression Analysis:
> - New regression? yes
> - Reproducibility? yes
>
> Build regressions: arch/s390/net/bpf_jit_comp.c:1813:49: error:
> 'struct bpf_jit' has no member named 'frame_off'
>
> Reported-by: Linux Kernel Functional Testing <[email-masked]>
>
> # Build error
> arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
> arch/s390/net/bpf_jit_comp.c:1813:49: error: 'struct bpf_jit' has no
> member named 'frame_off'
>  1813 |                         _EMIT6(0xd203f000 | (jit->frame_off +
>       |                                                 ^~
> arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
>   211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
>       |                                                       ^~~
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
>   211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
>       |                                                       ^~~
> arch/s390/net/bpf_jit_comp.c:1814:46: note: in expansion of macro 'offsetof'
>  1814 |                                              offsetof(struct prog_frame,
>       |                                              ^~~~~~~~
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
>   212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
>       |                                                           ^~~
> arch/s390/net/bpf_jit_comp.c:1816:41: note: in expansion of macro 'offsetof'
>  1816 |                                0xf000 | offsetof(struct prog_frame,
>       |                                         ^~~~~~~~
> arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
> include/linux/stddef.h:16:33: error: invalid use of undefined type
> 'struct prog_frame'
>    16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
>       |                                 ^~~~~~~~~~~~~~~~~~
> arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
>   212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
>       |                                                           ^~~
> arch/s390/net/bpf_jit_comp.c:2813:33: note: in expansion of macro 'offsetof'
>  2813 |                        0xf000 | offsetof(struct prog_frame,
> tail_call_cnt));
>       |                                 ^~~~~~~~
> make[5]: *** [scripts/Makefile.build:229: arch/s390/net/bpf_jit_comp.o] Error 1
>
> The git blame is pointing to,
>  $ git blame -L 1813  arch/s390/net/bpf_jit_comp.c
>    162513d7d81487 (Ilya Leoshkevich)    _EMIT6(0xd203f000 | (jit->frame_off +
>
> Commit pointing to,
>    s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
>    [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

Anders bisected reported regressions and also suggested the missing patches.

Ilya Leoshkevich,
Is it a good idea to backport / cherry pick these two patches on the
6.12 branch ?

b2268d550d20 ("s390/bpf: Centralize frame offset calculations")
e26d523edf2a ("s390/bpf: Describe the frame using a struct instead of
constants")

> ## Build
> * kernel: 6.12.53-rc1
> * git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> * git commit: 7e50c0945b4ab1d4019f9905f6cf5350082c6a84
> * git describe: v6.12.52-263-g7e50c0945b4a
> * test details:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.52-263-g7e50c0945b4a
>
> ## Test Regressions (compared to v6.12.50-47-gf7ad21173a19)
> * s390, build
>   - clang-21-defconfig
>   - clang-nightly-defconfig
>   - clang-nightly-lkftconfig-hardening
>   - clang-nightly-lkftconfig-lto-full
>   - clang-nightly-lkftconfig-lto-thing
>   - gcc-14-allmodconfig
>   - gcc-14-defconfig
>   - gcc-14-lkftconfig-hardening
>   - gcc-8-defconfig-fe40093d
>   - gcc-8-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-hardening
>   - korg-clang-21-lkftconfig-lto-full
>   - korg-clang-21-lkftconfig-lto-thing

- Naresh

From - Fri Oct 17 14:26:18 2025
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Date: Tue, 14 Oct 2025 14:38:07 +0100
From: Lorenzo Stoakes <[email-masked]>
To: Ryan Roberts <[email-masked]>
Cc: Andrew Morton <[email-masked]>,
        David Hildenbrand <[email-masked]>,
        "Liam R. Howlett" <[email-masked]>,
        Vlastimil Babka <[email-masked]>, Mike Rapoport <[email-masked]>,
        Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
        Amir Goldstein <[email-masked]>, [email-masked],
        [email-masked], [email-masked]
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
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On Fri, Oct 03, 2025 at 04:52:36PM +0100, Ryan Roberts wrote:
> fsnotify_mmap_perm() requires a byte offset for the file about to be
> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> Previously the conversion was done incorrectly so let's fix it, being
> careful not to overflow on 32-bit platforms.
>
> Discovered during code review.
>

Yikes, that's kind of crazy that has been in place for so long but not picked
up...

> Cc: <[email-masked]>
> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> Signed-off-by: Ryan Roberts <[email-masked]>

Thanks for fixing this!

LGTM, so:

Reviewed-by: Lorenzo Stoakes <[email-masked]>

> ---
> Applies against today's mm-unstable (aa05a436eca8).
>
> Thanks,
> Ryan
>
>
>  mm/util.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/mm/util.c b/mm/util.c
> index 6c1d64ed0221..8989d5767528 100644
> --- a/mm/util.c
> +++ b/mm/util.c
> @@ -566,6 +566,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>  	unsigned long len, unsigned long prot,
>  	unsigned long flag, unsigned long pgoff)
>  {
> +	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
>  	unsigned long ret;
>  	struct mm_struct *mm = current->mm;
>  	unsigned long populate;
> @@ -573,7 +574,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>
>  	ret = security_mmap_file(file, prot, flag);
>  	if (!ret)
> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
> +		ret = fsnotify_mmap_perm(file, prot, off, len);
>  	if (!ret) {
>  		if (mmap_write_lock_killable(mm))
>  			return -EINTR;
> --
> 2.43.0
>

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From: "Rafael J. Wysocki" <[email-masked]>
Date: Tue, 14 Oct 2025 15:47:06 +0200
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
To: Sergey Senozhatsky <[email-masked]>
Cc: Christian Loehle <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, 
	Greg Kroah-Hartman <[email-masked]>, 
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On Tue, Oct 14, 2025 at 12:23=E2=80=AFPM Sergey Senozhatsky
<[email-masked]> wrote:
>
> On (25/10/14 10:50), Christian Loehle wrote:
> > > Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> > > invalid recent intervals data") doesn't address the problems we are
> > > observing.  Revert seems to be bringing performance metrics back to
> > > pre-regression levels.
> >
> > Any details would be much appreciated.
> > How do the idle state usages differ with and without
> > "cpuidle: menu: Avoid discarding useful information"?
> > What do the idle states look like in your platform?
>
> Sure, I can run tests.

Would it be possible to check if the mainline has this issue?  That
is, compare the benchmark results on unmodified 6.17 (say) and on 6.17
with commit 85975daeaa4 reverted?

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Date: Tue, 14 Oct 2025 06:51:55 -0700
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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From: Ron Economos <[email-masked]>
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On 10/13/25 07:42, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.53 release.
> There are 262 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

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Date: Tue, 14 Oct 2025 22:56:32 +0900
From: Sergey Senozhatsky <[email-masked]>
To: "Rafael J. Wysocki" <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, 
	Christian Loehle <[email-masked]>, "Rafael J. Wysocki" <[email-masked]>, 
	Greg Kroah-Hartman <[email-masked]>, Artem Bityutskiy <[email-masked]>, 
	Sasha Levin <[email-masked]>, Daniel Lezcano <[email-masked]>, 
	[email-masked], [email-masked], Tomasz Figa <[email-masked]>, 
	[email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On (25/10/14 15:47), Rafael J. Wysocki wrote:
> On Tue, Oct 14, 2025 at 12:23 PM Sergey Senozhatsky
> <[email-masked]> wrote:
> >
> > > Any details would be much appreciated.
> > > How do the idle state usages differ with and without
> > > "cpuidle: menu: Avoid discarding useful information"?
> > > What do the idle states look like in your platform?
> >
> > Sure, I can run tests.
> 
> Would it be possible to check if the mainline has this issue?  That
> is, compare the benchmark results on unmodified 6.17 (say) and on 6.17
> with commit 85975daeaa4 reverted?

I don't think mainline kernel can run on those devices (due to
a bunch of downstream patches).  Best bet is 6.12, I guess.

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From: Jacopo Mondi <[email-masked]>
Date: Tue, 14 Oct 2025 15:19:33 +0200
Subject: [PATCH for v6.18 v5 1/2] media: cx18: Fix invalid access to file *
To: Andy Walls <[email-masked]>, 
 Mauro Carvalho Chehab <[email-masked]>, 
 Hans Verkuil <[email-masked]>, 
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 Jacopo Mondi <[email-masked]>
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Sice commit 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
all ioctl handlers have been ported to operate on the file * first
function argument.

The cx18 DVB layer calls cx18_init_on_first_open() when the driver needs
to start streaming. This function calls the s_input(), s_std() and
s_frequency() ioctl handlers directly, but being called from the driver
context, it doesn't have a valid file * to pass them. This causes
the ioctl handlers to deference an invalid pointer.

Fix this by moving the implementation of those ioctls to functions that
take a cx18 pointer instead of a file pointer, and turn the V4L2 ioctl
handlers into wrappers that get the cx18 from the file. When calling
from cx18_init_on_first_open(), pass the cx18 pointer directly. This
allows removing the fake fh in cx18_init_on_first_open().

The bug has been reported by Smatch:

--> 1223         cx18_s_input(NULL, &fh, video_input);
The patch adds a new dereference of "file" but some of the callers pass a
NULL pointer.

Reported-by: Dan Carpenter <[email-masked]>
Closes: https://lore.kernel.org/all/[email-masked]/
Fixes: 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
Cc: [email-masked]
Reviewed-by: Laurent Pinchart <[email-masked]>
Tested-by: Hans Verkuil <[email-masked]>
Signed-off-by: Jacopo Mondi <[email-masked]>
---
 drivers/media/pci/cx18/cx18-driver.c |  9 +++------
 drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
 drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
 3 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/drivers/media/pci/cx18/cx18-driver.c b/drivers/media/pci/cx18/cx18-driver.c
index b62fd12c93c1a37ea6c8d3d48871028d81b33485..74c59a94b2b051b1585051e2e3ea3ee8fbd16630 100644
--- a/drivers/media/pci/cx18/cx18-driver.c
+++ b/drivers/media/pci/cx18/cx18-driver.c
@@ -1136,11 +1136,8 @@ int cx18_init_on_first_open(struct cx18 *cx)
 	int video_input;
 	int fw_retry_count = 3;
 	struct v4l2_frequency vf;
-	struct cx18_open_id fh;
 	v4l2_std_id std;
 
-	fh.cx = cx;
-
 	if (test_bit(CX18_F_I_FAILED, &cx->i_flags))
 		return -ENXIO;
 
@@ -1220,14 +1217,14 @@ int cx18_init_on_first_open(struct cx18 *cx)
 
 	video_input = cx->active_input;
 	cx->active_input++;	/* Force update of input */
-	cx18_s_input(NULL, &fh, video_input);
+	cx18_do_s_input(cx, video_input);
 
 	/* Let the VIDIOC_S_STD ioctl do all the work, keeps the code
 	   in one place. */
 	cx->std++;		/* Force full standard initialization */
 	std = (cx->tuner_std == V4L2_STD_ALL) ? V4L2_STD_NTSC_M : cx->tuner_std;
-	cx18_s_std(NULL, &fh, std);
-	cx18_s_frequency(NULL, &fh, &vf);
+	cx18_do_s_std(cx, std);
+	cx18_do_s_frequency(cx, &vf);
 	return 0;
 }
 
diff --git a/drivers/media/pci/cx18/cx18-ioctl.c b/drivers/media/pci/cx18/cx18-ioctl.c
index 0f3019739d03dab1ed8ba63f71134a5b64807c7d..0d676a57e24ec901f004e4b3765614b6142daf00 100644
--- a/drivers/media/pci/cx18/cx18-ioctl.c
+++ b/drivers/media/pci/cx18/cx18-ioctl.c
@@ -521,10 +521,8 @@ static int cx18_g_input(struct file *file, void *fh, unsigned int *i)
 	return 0;
 }
 
-int cx18_s_input(struct file *file, void *fh, unsigned int inp)
+int cx18_do_s_input(struct cx18 *cx, unsigned int inp)
 {
-	struct cx18_open_id *id = file2id(file);
-	struct cx18 *cx = id->cx;
 	v4l2_std_id std = V4L2_STD_ALL;
 	const struct cx18_card_video_input *card_input =
 				cx->card->video_inputs + inp;
@@ -558,6 +556,11 @@ int cx18_s_input(struct file *file, void *fh, unsigned int inp)
 	return 0;
 }
 
+static int cx18_s_input(struct file *file, void *fh, unsigned int inp)
+{
+	return cx18_do_s_input(file2id(file)->cx, inp);
+}
+
 static int cx18_g_frequency(struct file *file, void *fh,
 				struct v4l2_frequency *vf)
 {
@@ -570,11 +573,8 @@ static int cx18_g_frequency(struct file *file, void *fh,
 	return 0;
 }
 
-int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
+int cx18_do_s_frequency(struct cx18 *cx, const struct v4l2_frequency *vf)
 {
-	struct cx18_open_id *id = file2id(file);
-	struct cx18 *cx = id->cx;
-
 	if (vf->tuner != 0)
 		return -EINVAL;
 
@@ -585,6 +585,12 @@ int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *v
 	return 0;
 }
 
+static int cx18_s_frequency(struct file *file, void *fh,
+			    const struct v4l2_frequency *vf)
+{
+	return cx18_do_s_frequency(file2id(file)->cx, vf);
+}
+
 static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
 {
 	struct cx18 *cx = file2id(file)->cx;
@@ -593,11 +599,8 @@ static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
 	return 0;
 }
 
-int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
+int cx18_do_s_std(struct cx18 *cx, v4l2_std_id std)
 {
-	struct cx18_open_id *id = file2id(file);
-	struct cx18 *cx = id->cx;
-
 	if ((std & V4L2_STD_ALL) == 0)
 		return -EINVAL;
 
@@ -642,6 +645,11 @@ int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
 	return 0;
 }
 
+static int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
+{
+	return cx18_do_s_std(file2id(file)->cx, std);
+}
+
 static int cx18_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt)
 {
 	struct cx18_open_id *id = file2id(file);
diff --git a/drivers/media/pci/cx18/cx18-ioctl.h b/drivers/media/pci/cx18/cx18-ioctl.h
index 97cd9f99e22d9676d427a7e9e12fb572a91b2a82..42a8acd69735469af548d9e5ea95d60d786f83e3 100644
--- a/drivers/media/pci/cx18/cx18-ioctl.h
+++ b/drivers/media/pci/cx18/cx18-ioctl.h
@@ -12,6 +12,8 @@ u16 cx18_service2vbi(int type);
 void cx18_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal);
 u16 cx18_get_service_set(struct v4l2_sliced_vbi_format *fmt);
 void cx18_set_funcs(struct video_device *vdev);
-int cx18_s_std(struct file *file, void *fh, v4l2_std_id std);
-int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf);
-int cx18_s_input(struct file *file, void *fh, unsigned int inp);
+
+struct cx18;
+int cx18_do_s_std(struct cx18 *cx, v4l2_std_id std);
+int cx18_do_s_frequency(struct cx18 *cx, const struct v4l2_frequency *vf);
+int cx18_do_s_input(struct cx18 *cx, unsigned int inp);

-- 
2.51.0

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From: Jacopo Mondi <[email-masked]>
Subject: [PATCH for v5 0/2] media: pci: Fix invalid access to file *
Date: Tue, 14 Oct 2025 15:19:32 +0200
To: Andy Walls <[email-masked]>, 
 Mauro Carvalho Chehab <[email-masked]>, 
 Hans Verkuil <[email-masked]>, 
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 Jacopo Mondi <[email-masked]>
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Since commits
7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")

All the ioctl handlers access their private data structures
from file *

The ivtv and cx18 drivers call the ioctl handlers from their
DVB layer without a valid file *, causing invalid memory access.

The issue has been reported by smatch in
"[bug report] media: cx18: Access v4l2_fh from file"

Fix this by providing wrappers for the ioctl handlers to be
used by the DVB layer that do not require a valid file *.

Signed-off-by: Jacopo Mondi <[email-masked]>
---
Changes in v5:
- Remove stray link from cx18 patch
- Add Hans' tags
- Link to v4: https://lore.kernel.org/r/[email-masked]

Changes in v4:
- Slightly adjust commit messages
- Link to v3: https://lore.kernel.org/r/[email-masked]

Changes in v3:
- Change helpers to accept the type they're going to operate on instead
  of using the open_id wrapper type as suggested by Laurent
- Link to v2: https://lore.kernel.org/r/[email-masked]

Changes in v2:
- Add Cc: [email-masked] per-patch

---
Jacopo Mondi (2):
      media: cx18: Fix invalid access to file *
      media: ivtv: Fix invalid access to file *

 drivers/media/pci/cx18/cx18-driver.c |  9 +++------
 drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
 drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
 drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
 drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
 drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
 6 files changed, 52 insertions(+), 34 deletions(-)
---
base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde

Best regards,
-- 
Jacopo Mondi <[email-masked]>

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From: Jacopo Mondi <[email-masked]>
Date: Tue, 14 Oct 2025 15:19:34 +0200
Subject: [PATCH for v6.18 v5 2/2] media: ivtv: Fix invalid access to file *
To: Andy Walls <[email-masked]>, 
 Mauro Carvalho Chehab <[email-masked]>, 
 Hans Verkuil <[email-masked]>, 
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 Jacopo Mondi <[email-masked]>
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Since commit 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
all ioctl handlers have been ported to operate on the file * first
function argument.

The ivtv DVB layer calls ivtv_init_on_first_open() when the driver
needs to start streaming. This function calls the s_input() and
s_frequency() ioctl handlers directly, but being called from the driver
context, it doesn't have a valid file * to pass them. This causes the
ioctl handlers to deference an invalid pointer.

Fix this by moving the implementation of those ioctls to two helper
functions.

The ivtv_do_s_input() helper accepts a struct ivtv * as first argument,
which is easily accessible in ivtv_init_on_first_open() as well as from
the file * argument of the ioctl handler.

The ivtv_s_frequency() takes an ivtv_stream * instead. The stream * can
safely be accessed in ivtv_init_on_first_open() where it is hard-coded
to the IVTV_ENC_STREAM_TYPE_MPG stream type, as well as from the ioctl
handler as a valid stream type is associated to each open file handle
depending on which video device node has been opened in the ivtv_open()
file operation.

The bug has been reported by Smatch.

Reported-by: Dan Carpenter <[email-masked]>
Closes: https://lore.kernel.org/all/[email-masked]/
Fixes: 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
Cc: [email-masked]
Reviewed-by: Laurent Pinchart <[email-masked]>
Tested-by: Hans Verkuil <[email-masked]>
Signed-off-by: Jacopo Mondi <[email-masked]>
---
 drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
 drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
 drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
 3 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/drivers/media/pci/ivtv/ivtv-driver.c b/drivers/media/pci/ivtv/ivtv-driver.c
index 72a8f76a41f45091fdd4fe0335ecb828d555eb9c..459eb6cc370cc078a464d4f40659772ed650e128 100644
--- a/drivers/media/pci/ivtv/ivtv-driver.c
+++ b/drivers/media/pci/ivtv/ivtv-driver.c
@@ -1247,15 +1247,12 @@ static int ivtv_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
 
 int ivtv_init_on_first_open(struct ivtv *itv)
 {
-	struct v4l2_frequency vf;
 	/* Needed to call ioctls later */
-	struct ivtv_open_id fh;
+	struct ivtv_stream *s = &itv->streams[IVTV_ENC_STREAM_TYPE_MPG];
+	struct v4l2_frequency vf;
 	int fw_retry_count = 3;
 	int video_input;
 
-	fh.itv = itv;
-	fh.type = IVTV_ENC_STREAM_TYPE_MPG;
-
 	if (test_bit(IVTV_F_I_FAILED, &itv->i_flags))
 		return -ENXIO;
 
@@ -1297,13 +1294,13 @@ int ivtv_init_on_first_open(struct ivtv *itv)
 
 	video_input = itv->active_input;
 	itv->active_input++;	/* Force update of input */
-	ivtv_s_input(NULL, &fh, video_input);
+	ivtv_do_s_input(itv, video_input);
 
 	/* Let the VIDIOC_S_STD ioctl do all the work, keeps the code
 	   in one place. */
 	itv->std++;		/* Force full standard initialization */
 	itv->std_out = itv->std;
-	ivtv_s_frequency(NULL, &fh, &vf);
+	ivtv_do_s_frequency(s, &vf);
 
 	if (itv->card->v4l2_capabilities & V4L2_CAP_VIDEO_OUTPUT) {
 		/* Turn on the TV-out: ivtv_init_mpeg_decoder() initializes
diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c b/drivers/media/pci/ivtv/ivtv-ioctl.c
index 84c73bd22f2daf405ba5ef98894b98d40e5c7cf2..8d5ea3aec06f3dcb36ba4f52c9a8d621511d5c10 100644
--- a/drivers/media/pci/ivtv/ivtv-ioctl.c
+++ b/drivers/media/pci/ivtv/ivtv-ioctl.c
@@ -974,9 +974,8 @@ static int ivtv_g_input(struct file *file, void *fh, unsigned int *i)
 	return 0;
 }
 
-int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
+int ivtv_do_s_input(struct ivtv *itv, unsigned int inp)
 {
-	struct ivtv *itv = file2id(file)->itv;
 	v4l2_std_id std;
 	int i;
 
@@ -1017,6 +1016,11 @@ int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
 	return 0;
 }
 
+static int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
+{
+	return ivtv_do_s_input(file2id(file)->itv, inp);
+}
+
 static int ivtv_g_output(struct file *file, void *fh, unsigned int *i)
 {
 	struct ivtv *itv = file2id(file)->itv;
@@ -1065,10 +1069,9 @@ static int ivtv_g_frequency(struct file *file, void *fh, struct v4l2_frequency *
 	return 0;
 }
 
-int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
+int ivtv_do_s_frequency(struct ivtv_stream *s, const struct v4l2_frequency *vf)
 {
-	struct ivtv *itv = file2id(file)->itv;
-	struct ivtv_stream *s = &itv->streams[file2id(file)->type];
+	struct ivtv *itv = s->itv;
 
 	if (s->vdev.vfl_dir)
 		return -ENOTTY;
@@ -1082,6 +1085,15 @@ int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *v
 	return 0;
 }
 
+static int ivtv_s_frequency(struct file *file, void *fh,
+			    const struct v4l2_frequency *vf)
+{
+	struct ivtv_open_id *id = file2id(file);
+	struct ivtv *itv = id->itv;
+
+	return ivtv_do_s_frequency(&itv->streams[id->type], vf);
+}
+
 static int ivtv_g_std(struct file *file, void *fh, v4l2_std_id *std)
 {
 	struct ivtv *itv = file2id(file)->itv;
diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.h b/drivers/media/pci/ivtv/ivtv-ioctl.h
index 7f8c6f43d397f050a8116429db7a9a7accc0336b..96ca7e2ef973f72c4655726a854a5a6ac24be83b 100644
--- a/drivers/media/pci/ivtv/ivtv-ioctl.h
+++ b/drivers/media/pci/ivtv/ivtv-ioctl.h
@@ -9,6 +9,8 @@
 #ifndef IVTV_IOCTL_H
 #define IVTV_IOCTL_H
 
+struct ivtv;
+
 u16 ivtv_service2vbi(int type);
 void ivtv_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal);
 u16 ivtv_get_service_set(struct v4l2_sliced_vbi_format *fmt);
@@ -17,7 +19,7 @@ int ivtv_set_speed(struct ivtv *itv, int speed);
 void ivtv_set_funcs(struct video_device *vdev);
 void ivtv_s_std_enc(struct ivtv *itv, v4l2_std_id std);
 void ivtv_s_std_dec(struct ivtv *itv, v4l2_std_id std);
-int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf);
-int ivtv_s_input(struct file *file, void *fh, unsigned int inp);
+int ivtv_do_s_frequency(struct ivtv_stream *s, const struct v4l2_frequency *vf);
+int ivtv_do_s_input(struct ivtv *itv, unsigned int inp);
 
 #endif

-- 
2.51.0

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	<[email-masked]>, <[email-masked]>, <[email-masked]>
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
Date: Tue, 14 Oct 2025 06:09:35 -0700
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On Mon, 13 Oct 2025 16:42:22 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.53 release.
> There are 262 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.12:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.12.53-rc1-g7e50c0945b4a
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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From: Jon Hunter <[email-masked]>
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Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
Date: Tue, 14 Oct 2025 06:09:39 -0700
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On Mon, 13 Oct 2025 16:37:41 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.3-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.17:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.17.3-rc1-g99cf54e7bd2f
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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Date: Tue, 14 Oct 2025 14:11:33 +0100
Subject: Re: [PATCH 6.1 000/196] 6.1.156-rc1 review
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From: Jon Hunter <[email-masked]>
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Hi Greg,

On 14/10/2025 14:09, Jon Hunter wrote:
> On Mon, 13 Oct 2025 16:42:53 +0200, Greg Kroah-Hartman wrote:
>> This is the start of the stable review cycle for the 6.1.156 release.
>> There are 196 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
>>
>> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
>> Anything received after that time might be too late.
>>
>> The whole patch series can be found in one patch at:
>> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.156-rc1.gz
>> or in the git tree and branch at:
>> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
> 
> Failures detected for Tegra ...
> 
> Test results for stable-v6.1:
>      10 builds:	10 pass, 0 fail
>      28 boots:	28 pass, 0 fail
>      119 tests:	118 pass, 1 fail
> 
> Linux version:	6.1.156-rc1-gb9f52894e35f
> Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
>                  tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
>                  tegra194-p3509-0000+p3668-0000, tegra20-ventana,
>                  tegra210-p2371-2180, tegra210-p3450-0000,
>                  tegra30-cardhu-a04
> 
> Test failures:	tegra194-p2972-0000: boot.py

A new kernel warning is observed for this update which is ...

  ERR KERN Early cacheinfo failed, ret = -22

Bisect is pointing to this commit ...

# first bad commit: [988121168f4a3211c7f5e561c24bb0bbe8504565] 
arch_topology: Build cacheinfo from primary CPU

Jon

-- 
nvpublic

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From: Lu Baolu <[email-masked]>
To: Joerg Roedel <[email-masked]>,
	Will Deacon <[email-masked]>,
	Robin Murphy <[email-masked]>,
	Kevin Tian <[email-masked]>,
	Jason Gunthorpe <[email-masked]>,
	Jann Horn <[email-masked]>,
	Vasant Hegde <[email-masked]>,
	Thomas Gleixner <[email-masked]>,
	Ingo Molnar <[email-masked]>,
	Borislav Petkov <[email-masked]>,
	Dave Hansen <[email-masked]>,
	Alistair Popple <[email-masked]>,
	Peter Zijlstra <[email-masked]>,
	Uladzislau Rezki <[email-masked]>,
	Jean-Philippe Brucker <[email-masked]>,
	Andy Lutomirski <[email-masked]>,
	Yi Lai <[email-masked]>,
	David Hildenbrand <[email-masked]>,
	Lorenzo Stoakes <[email-masked]>,
	"Liam R . Howlett" <[email-masked]>,
	Andrew Morton <[email-masked]>,
	Vlastimil Babka <[email-masked]>,
	Mike Rapoport <[email-masked]>,
	Michal Hocko <[email-masked]>,
	Matthew Wilcox <[email-masked]>
Cc: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Lu Baolu <[email-masked]>,
	[email-masked]
Subject: [PATCH v6 7/7] iommu/sva: Invalidate stale IOTLB entries for kernel address space
Date: Tue, 14 Oct 2025 21:04:37 +0800
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In the IOMMU Shared Virtual Addressing (SVA) context, the IOMMU hardware
shares and walks the CPU's page tables. The x86 architecture maps the
kernel's virtual address space into the upper portion of every process's
page table. Consequently, in an SVA context, the IOMMU hardware can walk
and cache kernel page table entries.

The Linux kernel currently lacks a notification mechanism for kernel page
table changes, specifically when page table pages are freed and reused.
The IOMMU driver is only notified of changes to user virtual address
mappings. This can cause the IOMMU's internal caches to retain stale
entries for kernel VA.

A Use-After-Free (UAF) and Write-After-Free (WAF) condition arises when
kernel page table pages are freed and later reallocated. The IOMMU could
misinterpret the new data as valid page table entries. The IOMMU might
then walk into attacker-controlled memory, leading to arbitrary physical
memory DMA access or privilege escalation. This is also a Write-After-Free
issue, as the IOMMU will potentially continue to write Accessed and Dirty
bits to the freed memory while attempting to walk the stale page tables.

Currently, SVA contexts are unprivileged and cannot access kernel
mappings. However, the IOMMU will still walk kernel-only page tables
all the way down to the leaf entries, where it realizes the mapping
is for the kernel and errors out. This means the IOMMU still caches
these intermediate page table entries, making the described vulnerability
a real concern.

To mitigate this, a new IOMMU interface is introduced to flush IOTLB
entries for the kernel address space. This interface is invoked from the
x86 architecture code that manages combined user and kernel page tables,
specifically before any kernel page table page is freed and reused.

This addresses the main issue with vfree() which is a common occurrence
and can be triggered by unprivileged users. While this resolves the
primary problem, it doesn't address some extremely rare case related to
memory unplug of memory that was present as reserved memory at boot,
which cannot be triggered by unprivileged users. The discussion can be
found at the link below.

Fixes: 26b25a2b98e4 ("iommu: Bind process address spaces to devices")
Cc: [email-masked]
Suggested-by: Jann Horn <[email-masked]>
Co-developed-by: Jason Gunthorpe <[email-masked]>
Signed-off-by: Jason Gunthorpe <[email-masked]>
Signed-off-by: Lu Baolu <[email-masked]>
Reviewed-by: Jason Gunthorpe <[email-masked]>
Reviewed-by: Vasant Hegde <[email-masked]>
Reviewed-by: Kevin Tian <[email-masked]>
Link: https://lore.kernel.org/linux-iommu/[email-masked]/
---
 include/linux/iommu.h     |  4 ++++
 drivers/iommu/iommu-sva.c | 29 ++++++++++++++++++++++++++++-
 mm/pgtable-generic.c      |  2 ++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index c30d12e16473..66e4abb2df0d 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -1134,7 +1134,9 @@ struct iommu_sva {
 
 struct iommu_mm_data {
 	u32			pasid;
+	struct mm_struct	*mm;
 	struct list_head	sva_domains;
+	struct list_head	mm_list_elm;
 };
 
 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode);
@@ -1615,6 +1617,7 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev,
 					struct mm_struct *mm);
 void iommu_sva_unbind_device(struct iommu_sva *handle);
 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
+void iommu_sva_invalidate_kva_range(unsigned long start, unsigned long end);
 #else
 static inline struct iommu_sva *
 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
@@ -1639,6 +1642,7 @@ static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm)
 }
 
 static inline void mm_pasid_drop(struct mm_struct *mm) {}
+static inline void iommu_sva_invalidate_kva_range(unsigned long start, unsigned long end) {}
 #endif /* CONFIG_IOMMU_SVA */
 
 #ifdef CONFIG_IOMMU_IOPF
diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c
index 1a51cfd82808..d236aef80a8d 100644
--- a/drivers/iommu/iommu-sva.c
+++ b/drivers/iommu/iommu-sva.c
@@ -10,6 +10,8 @@
 #include "iommu-priv.h"
 
 static DEFINE_MUTEX(iommu_sva_lock);
+static bool iommu_sva_present;
+static LIST_HEAD(iommu_sva_mms);
 static struct iommu_domain *iommu_sva_domain_alloc(struct device *dev,
 						   struct mm_struct *mm);
 
@@ -42,6 +44,7 @@ static struct iommu_mm_data *iommu_alloc_mm_data(struct mm_struct *mm, struct de
 		return ERR_PTR(-ENOSPC);
 	}
 	iommu_mm->pasid = pasid;
+	iommu_mm->mm = mm;
 	INIT_LIST_HEAD(&iommu_mm->sva_domains);
 	/*
 	 * Make sure the write to mm->iommu_mm is not reordered in front of
@@ -132,8 +135,13 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm
 	if (ret)
 		goto out_free_domain;
 	domain->users = 1;
-	list_add(&domain->next, &mm->iommu_mm->sva_domains);
 
+	if (list_empty(&iommu_mm->sva_domains)) {
+		if (list_empty(&iommu_sva_mms))
+			iommu_sva_present = true;
+		list_add(&iommu_mm->mm_list_elm, &iommu_sva_mms);
+	}
+	list_add(&domain->next, &iommu_mm->sva_domains);
 out:
 	refcount_set(&handle->users, 1);
 	mutex_unlock(&iommu_sva_lock);
@@ -175,6 +183,13 @@ void iommu_sva_unbind_device(struct iommu_sva *handle)
 		list_del(&domain->next);
 		iommu_domain_free(domain);
 	}
+
+	if (list_empty(&iommu_mm->sva_domains)) {
+		list_del(&iommu_mm->mm_list_elm);
+		if (list_empty(&iommu_sva_mms))
+			iommu_sva_present = false;
+	}
+
 	mutex_unlock(&iommu_sva_lock);
 	kfree(handle);
 }
@@ -312,3 +327,15 @@ static struct iommu_domain *iommu_sva_domain_alloc(struct device *dev,
 
 	return domain;
 }
+
+void iommu_sva_invalidate_kva_range(unsigned long start, unsigned long end)
+{
+	struct iommu_mm_data *iommu_mm;
+
+	guard(mutex)(&iommu_sva_lock);
+	if (!iommu_sva_present)
+		return;
+
+	list_for_each_entry(iommu_mm, &iommu_sva_mms, mm_list_elm)
+		mmu_notifier_arch_invalidate_secondary_tlbs(iommu_mm->mm, start, end);
+}
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 1c7caa8ef164..8c22be79b734 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -13,6 +13,7 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 #include <linux/mm_inline.h>
+#include <linux/iommu.h>
 #include <asm/pgalloc.h>
 #include <asm/tlb.h>
 
@@ -430,6 +431,7 @@ static void kernel_pgtable_work_func(struct work_struct *work)
 	list_splice_tail_init(&kernel_pgtable_work.list, &page_list);
 	spin_unlock(&kernel_pgtable_work.lock);
 
+	iommu_sva_invalidate_kva_range(PAGE_OFFSET, TLB_FLUSH_ALL);
 	list_for_each_entry_safe(pt, next, &page_list, pt_list)
 		__pagetable_free(pt);
 }
-- 
2.43.0

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From: Jon Hunter <[email-masked]>
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CC: Greg Kroah-Hartman <[email-masked]>,
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Subject: Re: [PATCH 6.1 000/196] 6.1.156-rc1 review
Date: Tue, 14 Oct 2025 06:09:25 -0700
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On Mon, 13 Oct 2025 16:42:53 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.1.156 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.156-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

Failures detected for Tegra ...

Test results for stable-v6.1:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    119 tests:	118 pass, 1 fail

Linux version:	6.1.156-rc1-gb9f52894e35f
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Test failures:	tegra194-p2972-0000: boot.py

Jon

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Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
Date: Tue, 14 Oct 2025 06:09:28 -0700
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On Mon, 13 Oct 2025 16:43:11 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.112-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.6:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.6.112-rc1-g07c1c4215e92
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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Date: Tue, 14 Oct 2025 14:34:09 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v4 2/2] media: ivtv: Fix invalid access to file *
To: Jacopo Mondi <[email-masked]>,
 Andy Walls <[email-masked]>,
 Mauro Carvalho Chehab <[email-masked]>,
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
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On 19/08/2025 09:07, Jacopo Mondi wrote:
> Since commit 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
> all ioctl handlers have been ported to operate on the file * first
> function argument.
> 
> The ivtv DVB layer calls ivtv_init_on_first_open() when the driver
> needs to start streaming. This function calls the s_input() and
> s_frequency() ioctl handlers directly, but being called from the driver
> context, it doesn't have a valid file * to pass them. This causes the
> ioctl handlers to deference an invalid pointer.
> 
> Fix this by moving the implementation of those ioctls to two helper
> functions.
> 
> The ivtv_do_s_input() helper accepts a struct ivtv * as first argument,
> which is easily accessible in ivtv_init_on_first_open() as well as from
> the file * argument of the ioctl handler.
> 
> The ivtv_s_frequency() takes an ivtv_stream * instead. The stream * can
> safely be accessed in ivtv_init_on_first_open() where it is hard-coded
> to the IVTV_ENC_STREAM_TYPE_MPG stream type, as well as from the ioctl
> handler as a valid stream type is associated to each open file handle
> depending on which video device node has been opened in the ivtv_open()
> file operation.
> 
> The bug has been reported by Smatch.
> 
> Reported-by: Dan Carpenter <[email-masked]>
> Closes: https://lore.kernel.org/all/[email-masked]/
> Fixes: 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
> Cc: [email-masked]
> Reviewed-by: Laurent Pinchart <[email-masked]>
> Signed-off-by: Jacopo Mondi <[email-masked]>

Tested-by: Hans Verkuil <[email-masked]>

I'll try the cx18 board next :-)

Regards,

	Hans

> ---
>  drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
>  drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
>  drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
>  3 files changed, 25 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/media/pci/ivtv/ivtv-driver.c b/drivers/media/pci/ivtv/ivtv-driver.c
> index ecc20cd89926fe2ce4e472526a6b5fc0857615dd..7e2fb98cfccf02f701ceb4484dd1d330dd1dc867 100644
> --- a/drivers/media/pci/ivtv/ivtv-driver.c
> +++ b/drivers/media/pci/ivtv/ivtv-driver.c
> @@ -1260,15 +1260,12 @@ static int ivtv_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
>  
>  int ivtv_init_on_first_open(struct ivtv *itv)
>  {
> -	struct v4l2_frequency vf;
>  	/* Needed to call ioctls later */
> -	struct ivtv_open_id fh;
> +	struct ivtv_stream *s = &itv->streams[IVTV_ENC_STREAM_TYPE_MPG];
> +	struct v4l2_frequency vf;
>  	int fw_retry_count = 3;
>  	int video_input;
>  
> -	fh.itv = itv;
> -	fh.type = IVTV_ENC_STREAM_TYPE_MPG;
> -
>  	if (test_bit(IVTV_F_I_FAILED, &itv->i_flags))
>  		return -ENXIO;
>  
> @@ -1310,13 +1307,13 @@ int ivtv_init_on_first_open(struct ivtv *itv)
>  
>  	video_input = itv->active_input;
>  	itv->active_input++;	/* Force update of input */
> -	ivtv_s_input(NULL, &fh, video_input);
> +	ivtv_do_s_input(itv, video_input);
>  
>  	/* Let the VIDIOC_S_STD ioctl do all the work, keeps the code
>  	   in one place. */
>  	itv->std++;		/* Force full standard initialization */
>  	itv->std_out = itv->std;
> -	ivtv_s_frequency(NULL, &fh, &vf);
> +	ivtv_do_s_frequency(s, &vf);
>  
>  	if (itv->card->v4l2_capabilities & V4L2_CAP_VIDEO_OUTPUT) {
>  		/* Turn on the TV-out: ivtv_init_mpeg_decoder() initializes
> diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c b/drivers/media/pci/ivtv/ivtv-ioctl.c
> index 8077a71d4850ec773caa20c3fca08f92f3117d69..dfbc842b22453868a2075935a81db7ae313ee46c 100644
> --- a/drivers/media/pci/ivtv/ivtv-ioctl.c
> +++ b/drivers/media/pci/ivtv/ivtv-ioctl.c
> @@ -974,9 +974,8 @@ static int ivtv_g_input(struct file *file, void *fh, unsigned int *i)
>  	return 0;
>  }
>  
> -int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
> +int ivtv_do_s_input(struct ivtv *itv, unsigned int inp)
>  {
> -	struct ivtv *itv = file2id(file)->itv;
>  	v4l2_std_id std;
>  	int i;
>  
> @@ -1017,6 +1016,11 @@ int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
>  	return 0;
>  }
>  
> +static int ivtv_s_input(struct file *file, void *fh, unsigned int inp)
> +{
> +	return ivtv_do_s_input(file2id(file)->itv, inp);
> +}
> +
>  static int ivtv_g_output(struct file *file, void *fh, unsigned int *i)
>  {
>  	struct ivtv *itv = file2id(file)->itv;
> @@ -1065,10 +1069,9 @@ static int ivtv_g_frequency(struct file *file, void *fh, struct v4l2_frequency *
>  	return 0;
>  }
>  
> -int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
> +int ivtv_do_s_frequency(struct ivtv_stream *s, const struct v4l2_frequency *vf)
>  {
> -	struct ivtv *itv = file2id(file)->itv;
> -	struct ivtv_stream *s = &itv->streams[file2id(file)->type];
> +	struct ivtv *itv = s->itv;
>  
>  	if (s->vdev.vfl_dir)
>  		return -ENOTTY;
> @@ -1082,6 +1085,15 @@ int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *v
>  	return 0;
>  }
>  
> +static int ivtv_s_frequency(struct file *file, void *fh,
> +			    const struct v4l2_frequency *vf)
> +{
> +	struct ivtv_open_id *id = file2id(file);
> +	struct ivtv *itv = id->itv;
> +
> +	return ivtv_do_s_frequency(&itv->streams[id->type], vf);
> +}
> +
>  static int ivtv_g_std(struct file *file, void *fh, v4l2_std_id *std)
>  {
>  	struct ivtv *itv = file2id(file)->itv;
> diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.h b/drivers/media/pci/ivtv/ivtv-ioctl.h
> index 42c2516379fcbbd0640820ab0e3abe9bf00b57ea..edc05eb8e060fd64d7ff94f8f7f5c315a2fa6298 100644
> --- a/drivers/media/pci/ivtv/ivtv-ioctl.h
> +++ b/drivers/media/pci/ivtv/ivtv-ioctl.h
> @@ -9,6 +9,8 @@
>  #ifndef IVTV_IOCTL_H
>  #define IVTV_IOCTL_H
>  
> +struct ivtv;
> +
>  u16 ivtv_service2vbi(int type);
>  void ivtv_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal);
>  u16 ivtv_get_service_set(struct v4l2_sliced_vbi_format *fmt);
> @@ -17,7 +19,7 @@ int ivtv_set_speed(struct ivtv *itv, int speed);
>  void ivtv_set_funcs(struct video_device *vdev);
>  void ivtv_s_std_enc(struct ivtv *itv, v4l2_std_id std);
>  void ivtv_s_std_dec(struct ivtv *itv, v4l2_std_id std);
> -int ivtv_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf);
> -int ivtv_s_input(struct file *file, void *fh, unsigned int inp);
> +int ivtv_do_s_frequency(struct ivtv_stream *s, const struct v4l2_frequency *vf);
> +int ivtv_do_s_input(struct ivtv *itv, unsigned int inp);
>  
>  #endif
> 

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From: David Hildenbrand <[email-masked]>
To: [email-masked]
Cc: [email-masked],
	David Hildenbrand <[email-masked]>,
	[email-masked],
	Andrew Morton <[email-masked]>,
	Jerrin Shaji George <[email-masked]>,
	Broadcom internal kernel review list <[email-masked]>,
	Arnd Bergmann <[email-masked]>,
	Greg Kroah-Hartman <[email-masked]>
Subject: [PATCH v1] vmw_balloon: indicate success when effectively deflating during migration
Date: Tue, 14 Oct 2025 14:44:55 +0200
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When migrating a balloon page, we first deflate the old page to then
inflate the new page.

However, if inflating the new page succeeded, we effectively deflated
the old page, reducing the balloon size.

In that case, the migration actually worked: similar to migrating+
immediately deflating the new page. The old page will be freed back to
the buddy.

Right now, the core will leave the page be marked as isolated (as
we returned an error). When later trying to putback that page, we will
run into the WARN_ON_ONCE() in balloon_page_putback().

That handling was changed in commit 3544c4faccb8 ("mm/balloon_compaction:
stop using __ClearPageMovable()"); before that change, we would have
tolerated that way of handling it.

To fix it, let's just return 0 in that case, making the core effectively
just clear the "isolated" flag + freeing it back to the buddy as if the
migration succeeded. Note that the new page will also get freed when the
core puts the last reference.

Note that this also makes it all be more consistent: we will no longer
unisolate the page in the balloon driver while keeping it marked as
being isolated in migration core.

This was found by code inspection.

Fixes: 3544c4faccb8 ("mm/balloon_compaction: stop using __ClearPageMovable()")
Cc: <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Cc: Jerrin Shaji George <[email-masked]>
Cc: Broadcom internal kernel review list <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Greg Kroah-Hartman <[email-masked]>
Signed-off-by: David Hildenbrand <[email-masked]>
---

I have no easy way to test this, and I assume it happens very very rarely
(inflation during migration failing).

I would prefer this to go through the MM-tree, as I have some follow-up
balloon_compaction reworks also mess with this code.

---
 drivers/misc/vmw_balloon.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index 6df51ee8db621..cc1d18b3df5ca 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -1737,7 +1737,7 @@ static int vmballoon_migratepage(struct balloon_dev_info *b_dev_info,
 {
 	unsigned long status, flags;
 	struct vmballoon *b;
-	int ret;
+	int ret = 0;
 
 	b = container_of(b_dev_info, struct vmballoon, b_dev_info);
 
@@ -1796,17 +1796,15 @@ static int vmballoon_migratepage(struct balloon_dev_info *b_dev_info,
 		 * A failure happened. While we can deflate the page we just
 		 * inflated, this deflation can also encounter an error. Instead
 		 * we will decrease the size of the balloon to reflect the
-		 * change and report failure.
+		 * change.
 		 */
 		atomic64_dec(&b->size);
-		ret = -EBUSY;
 	} else {
 		/*
 		 * Success. Take a reference for the page, and we will add it to
 		 * the list after acquiring the lock.
 		 */
 		get_page(newpage);
-		ret = 0;
 	}
 
 	/* Update the balloon list under the @pages_lock */
@@ -1817,7 +1815,7 @@ static int vmballoon_migratepage(struct balloon_dev_info *b_dev_info,
 	 * If we succeed just insert it to the list and update the statistics
 	 * under the lock.
 	 */
-	if (!ret) {
+	if (status == VMW_BALLOON_SUCCESS) {
 		balloon_page_insert(&b->b_dev_info, newpage);
 		__count_vm_event(BALLOON_MIGRATE);
 	}

base-commit: 1c58c31dc83e39f4790ae778626b6b8b59bc0db8
-- 
2.51.0

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Date: Tue, 14 Oct 2025 14:53:01 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v4 1/2] media: cx18: Fix invalid access to file *
To: Jacopo Mondi <[email-masked]>,
 Andy Walls <[email-masked]>,
 Mauro Carvalho Chehab <[email-masked]>,
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
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On 19/08/2025 09:07, Jacopo Mondi wrote:
> Sice commit 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
> all ioctl handlers have been ported to operate on the file * first
> function argument.
> 
> The cx18 DVB layer calls cx18_init_on_first_open() when the driver needs
> to start streaming. This function calls the s_input(), s_std() and
> s_frequency() ioctl handlers directly, but being called from the driver
> context, it doesn't have a valid file * to pass them. This causes
> the ioctl handlers to deference an invalid pointer.
> 
> Fix this by moving the implementation of those ioctls to functions that
> take a cx18 pointer instead of a file pointer, and turn the V4L2 ioctl
> handlers into wrappers that get the cx18 from the file. When calling
> from cx18_init_on_first_open(), pass the cx18 pointer directly. This
> allows removing the fake fh in cx18_init_on_first_open().
> 
> The bug has been reported by Smatch:
> 
> --> 1223         cx18_s_input(NULL, &fh, video_input);
> The patch adds a new dereference of "file" but some of the callers pass a
> NULL pointer.
> 
> Reported-by: Dan Carpenter <[email-masked]>
> Closes: https://lore.kernel.org/all/[email-masked]/
> Fixes: 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
> Cc: [email-masked]
> Link: https://lore.kernel.org/stable/20250818-cx18-v4l2-fh-v1-1-6fe153760bce%40ideasonboard.com
> Reviewed-by: Laurent Pinchart <[email-masked]>
> Signed-off-by: Jacopo Mondi <[email-masked]>

Tested-by: Hans Verkuil <[email-masked]>

Regards,

	Hans

> ---
>  drivers/media/pci/cx18/cx18-driver.c |  9 +++------
>  drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
>  drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
>  3 files changed, 27 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/media/pci/cx18/cx18-driver.c b/drivers/media/pci/cx18/cx18-driver.c
> index 743fcc9613744bfc1edeffc51e908fe88520405a..cd84dfcefcf971a7adb9aac2bafb9089dbe0f33f 100644
> --- a/drivers/media/pci/cx18/cx18-driver.c
> +++ b/drivers/media/pci/cx18/cx18-driver.c
> @@ -1136,11 +1136,8 @@ int cx18_init_on_first_open(struct cx18 *cx)
>  	int video_input;
>  	int fw_retry_count = 3;
>  	struct v4l2_frequency vf;
> -	struct cx18_open_id fh;
>  	v4l2_std_id std;
>  
> -	fh.cx = cx;
> -
>  	if (test_bit(CX18_F_I_FAILED, &cx->i_flags))
>  		return -ENXIO;
>  
> @@ -1220,14 +1217,14 @@ int cx18_init_on_first_open(struct cx18 *cx)
>  
>  	video_input = cx->active_input;
>  	cx->active_input++;	/* Force update of input */
> -	cx18_s_input(NULL, &fh, video_input);
> +	cx18_do_s_input(cx, video_input);
>  
>  	/* Let the VIDIOC_S_STD ioctl do all the work, keeps the code
>  	   in one place. */
>  	cx->std++;		/* Force full standard initialization */
>  	std = (cx->tuner_std == V4L2_STD_ALL) ? V4L2_STD_NTSC_M : cx->tuner_std;
> -	cx18_s_std(NULL, &fh, std);
> -	cx18_s_frequency(NULL, &fh, &vf);
> +	cx18_do_s_std(cx, std);
> +	cx18_do_s_frequency(cx, &vf);
>  	return 0;
>  }
>  
> diff --git a/drivers/media/pci/cx18/cx18-ioctl.c b/drivers/media/pci/cx18/cx18-ioctl.c
> index bf16d36448f888d9326b5f4a8f9c8f0e13d0c3a1..6e869c43cbd520feb720a71d8eb2dd60c05b0ae9 100644
> --- a/drivers/media/pci/cx18/cx18-ioctl.c
> +++ b/drivers/media/pci/cx18/cx18-ioctl.c
> @@ -521,10 +521,8 @@ static int cx18_g_input(struct file *file, void *fh, unsigned int *i)
>  	return 0;
>  }
>  
> -int cx18_s_input(struct file *file, void *fh, unsigned int inp)
> +int cx18_do_s_input(struct cx18 *cx, unsigned int inp)
>  {
> -	struct cx18_open_id *id = file2id(file);
> -	struct cx18 *cx = id->cx;
>  	v4l2_std_id std = V4L2_STD_ALL;
>  	const struct cx18_card_video_input *card_input =
>  				cx->card->video_inputs + inp;
> @@ -558,6 +556,11 @@ int cx18_s_input(struct file *file, void *fh, unsigned int inp)
>  	return 0;
>  }
>  
> +static int cx18_s_input(struct file *file, void *fh, unsigned int inp)
> +{
> +	return cx18_do_s_input(file2id(file)->cx, inp);
> +}
> +
>  static int cx18_g_frequency(struct file *file, void *fh,
>  				struct v4l2_frequency *vf)
>  {
> @@ -570,11 +573,8 @@ static int cx18_g_frequency(struct file *file, void *fh,
>  	return 0;
>  }
>  
> -int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
> +int cx18_do_s_frequency(struct cx18 *cx, const struct v4l2_frequency *vf)
>  {
> -	struct cx18_open_id *id = file2id(file);
> -	struct cx18 *cx = id->cx;
> -
>  	if (vf->tuner != 0)
>  		return -EINVAL;
>  
> @@ -585,6 +585,12 @@ int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *v
>  	return 0;
>  }
>  
> +static int cx18_s_frequency(struct file *file, void *fh,
> +			    const struct v4l2_frequency *vf)
> +{
> +	return cx18_do_s_frequency(file2id(file)->cx, vf);
> +}
> +
>  static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
>  {
>  	struct cx18 *cx = file2id(file)->cx;
> @@ -593,11 +599,8 @@ static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
>  	return 0;
>  }
>  
> -int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
> +int cx18_do_s_std(struct cx18 *cx, v4l2_std_id std)
>  {
> -	struct cx18_open_id *id = file2id(file);
> -	struct cx18 *cx = id->cx;
> -
>  	if ((std & V4L2_STD_ALL) == 0)
>  		return -EINVAL;
>  
> @@ -642,6 +645,11 @@ int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
>  	return 0;
>  }
>  
> +static int cx18_s_std(struct file *file, void *fh, v4l2_std_id std)
> +{
> +	return cx18_do_s_std(file2id(file)->cx, std);
> +}
> +
>  static int cx18_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt)
>  {
>  	struct cx18_open_id *id = file2id(file);
> diff --git a/drivers/media/pci/cx18/cx18-ioctl.h b/drivers/media/pci/cx18/cx18-ioctl.h
> index 221e2400fb3e2d817eaff7515fa89eb94f2d7f8a..7a42ac99312ab6502e1abe4f3d5c88c9c7f144f3 100644
> --- a/drivers/media/pci/cx18/cx18-ioctl.h
> +++ b/drivers/media/pci/cx18/cx18-ioctl.h
> @@ -12,6 +12,8 @@ u16 cx18_service2vbi(int type);
>  void cx18_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal);
>  u16 cx18_get_service_set(struct v4l2_sliced_vbi_format *fmt);
>  void cx18_set_funcs(struct video_device *vdev);
> -int cx18_s_std(struct file *file, void *fh, v4l2_std_id std);
> -int cx18_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf);
> -int cx18_s_input(struct file *file, void *fh, unsigned int inp);
> +
> +struct cx18;
> +int cx18_do_s_std(struct cx18 *cx, v4l2_std_id std);
> +int cx18_do_s_frequency(struct cx18 *cx, const struct v4l2_frequency *vf);
> +int cx18_do_s_input(struct cx18 *cx, unsigned int inp);
> 

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Date: Tue, 14 Oct 2025 13:56:05 +0100
From: Simon Horman <[email-masked]>
To: Harshitha Ramamurthy <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH net] gve: Check valid ts bit on RX descriptor before hw
 timestamping
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On Tue, Oct 14, 2025 at 12:47:39AM +0000, Harshitha Ramamurthy wrote:
> From: Tim Hostetler <[email-masked]>
> 
> The device returns a valid bit in the LSB of the low timestamp byte in
> the completion descriptor that the driver should check before
> setting the SKB's hardware timestamp. If the timestamp is not valid, do not
> hardware timestamp the SKB.
> 
> Cc: [email-masked]
> Fixes: b2c7aeb49056 ("gve: Implement ndo_hwtstamp_get/set for RX timestamping")
> Reviewed-by: Joshua Washington <[email-masked]>
> Signed-off-by: Tim Hostetler <[email-masked]>
> Signed-off-by: Harshitha Ramamurthy <[email-masked]>

Reviewed-by: Simon Horman <[email-masked]>

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Date: Tue, 14 Oct 2025 13:57:53 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v4 0/2] media: pci: Fix invalid access to file *
To: Jacopo Mondi <[email-masked]>
Cc: Andy Walls <[email-masked]>,
 Mauro Carvalho Chehab <[email-masked]>,
 Laurent Pinchart <[email-masked]>,
 Dan Carpenter <[email-masked]>, [email-masked],
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On 14/10/2025 13:52, Jacopo Mondi wrote:
> Hi Hans
> 
> On Tue, Oct 14, 2025 at 09:05:20AM +0200, Hans Verkuil wrote:
>> Hi Jacopo,
>>
>> On 19/08/2025 09:07, Jacopo Mondi wrote:
>>> Since commits
>>> 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
>>> 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
>>>
>>> All the ioctl handlers access their private data structures
>>> from file *
>>>
>>> The ivtv and cx18 drivers call the ioctl handlers from their
>>> DVB layer without a valid file *, causing invalid memory access.
>>>
>>> The issue has been reported by smatch in
>>> "[bug report] media: cx18: Access v4l2_fh from file"
>>>
>>> Fix this by providing wrappers for the ioctl handlers to be
>>> used by the DVB layer that do not require a valid file *.
>>
>> This series should go to the fixes branch for v6.18, right?
>> This looks like a pure regression, so I think that makes sense.
>>
> 
> I think so, yes
> 
>> BTW, why is there a Link: tag in the cx18 patch? It just links to
>> the v1 of the patch and that doesn't add meaningful information.
>> Linus likes Link:, but only if it really adds useful information.
> 
> Good question. I presume it's probably a copy&paste error, as it has no
> place in the patch.
> 
> Would you like me to resend or will you remove it ?

I would prefer a resend for these two patches, clearly marked as [PATCH for v6.18 v5 n/2]
in the subject.

Normally I'd just drop the Link: tag, but it's good to have this clearly marked
as a fix for v6.18.

I'll also see if I can do a quick test of these two patches with my ivtv and cx18
boards. Just to make sure there are no other corner cases lurking in these drivers.

Regards,

	Hans

> 
> 
>>
>> Regards,
>>
>> 	Hans
>>
>>>
>>> Signed-off-by: Jacopo Mondi <[email-masked]>
>>> ---
>>> Changes in v4:
>>> - Slightly adjust commit messages
>>> - Link to v3: https://lore.kernel.org/r/[email-masked]
>>>
>>> Changes in v3:
>>> - Change helpers to accept the type they're going to operate on instead
>>>   of using the open_id wrapper type as suggested by Laurent
>>> - Link to v2: https://lore.kernel.org/r/[email-masked]
>>>
>>> Changes in v2:
>>> - Add Cc: [email-masked] per-patch
>>>
>>> ---
>>> Jacopo Mondi (2):
>>>       media: cx18: Fix invalid access to file *
>>>       media: ivtv: Fix invalid access to file *
>>>
>>>  drivers/media/pci/cx18/cx18-driver.c |  9 +++------
>>>  drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
>>>  drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
>>>  drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
>>>  drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
>>>  drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
>>>  6 files changed, 52 insertions(+), 34 deletions(-)
>>> ---
>>> base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc
>>> change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde
>>>
>>> Best regards,
>>

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From: Matt Coster <[email-masked]>
Date: Tue, 14 Oct 2025 12:57:31 +0100
Subject: [PATCH] drm/imagination: Optionally depend on POWER_SEQUENCING
To: Maarten Lankhorst <[email-masked]>,
        Maxime Ripard
	<[email-masked]>,
        Thomas Zimmermann <[email-masked]>,
        David Airlie
	<[email-masked]>, Simona Vetter <[email-masked]>,
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	<[email-masked]>,
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CC: Frank Binns <[email-masked]>,
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	<[email-masked]>,
        Alexandru Dadu <[email-masked]>,
        <[email-masked]>, <[email-masked]>,
        <[email-masked]>, kernel test robot <[email-masked]>,
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	<[email-masked]>
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When the change using pwrseq was added, I nixed the dependency on
POWER_SEQUENCING since we didn't want it pulled in on platforms where
it's not needed [1]. I hadn't, however, considered the link-time
implications of this for configs with POWER_SEQUENCING=m.

[1]: https://lore.kernel.org/r/[email-masked]/

Fixes: e38e8391f30b ("drm/imagination: Use pwrseq for TH1520 GPU power management")
Cc: [email-masked]
Reported-by: kernel test robot <[email-masked]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/
Signed-off-by: Matt Coster <[email-masked]>
---
 drivers/gpu/drm/imagination/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/imagination/Kconfig b/drivers/gpu/drm/imagination/Kconfig
index 3bfa2ac212dc..7e7ffb9c2257 100644
--- a/drivers/gpu/drm/imagination/Kconfig
+++ b/drivers/gpu/drm/imagination/Kconfig
@@ -6,6 +6,7 @@ config DRM_POWERVR
 	depends on ARM64
 	depends on DRM
 	depends on PM
+	depends on POWER_SEQUENCING || !POWER_SEQUENCING
 	select DRM_EXEC
 	select DRM_GEM_SHMEM_HELPER
 	select DRM_SCHED

---
base-commit: db74b04edce1bc86b9a5acc724c7ca06f427ab60
change-id: 20251013-pwrseq-dep-0c158ad8029c

From - Fri Oct 17 14:26:18 2025
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Date: Tue, 14 Oct 2025 20:25:12 +0800
Subject: Re: [PATCH v5 1/1] mm/rmap: fix soft-dirty and uffd-wp bit loss when
 remapping zero-filled mTHP subpage to shared zeropage
To: Lorenzo Stoakes <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked]
From: Lance Yang <[email-masked]>
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Thanks for the super energetic review!

On 2025/10/14 19:19, Lorenzo Stoakes wrote:
> Feels like the mTHP implementation is hitting up on the buffers of the THP code
> being something of a mess... :)

Haha, yeah, it really feels that way sometimes ;)

> 
> On Tue, Sep 30, 2025 at 04:10:40PM +0800, Lance Yang wrote:
>> From: Lance Yang <[email-masked]>
>>
>> When splitting an mTHP and replacing a zero-filled subpage with the shared
>> zeropage, try_to_map_unused_to_zeropage() currently drops several important
>> PTE bits.
>>
>> For userspace tools like CRIU, which rely on the soft-dirty mechanism for
> 
> It's slightly by-the-by, but CRIU in my view - as it relies on kernel
> implementation details that can always change to operate - is not actually
> something we have to strictly keep working.
> 
> HOWEVER, if we can reasonably do so without causing issues for us in the kernel
> we ought to do so.
> 
>> incremental snapshots, losing the soft-dirty bit means modified pages are
>> missed, leading to inconsistent memory state after restore.
>>
>> As pointed out by David, the more critical uffd-wp bit is also dropped.
>> This breaks the userfaultfd write-protection mechanism, causing writes
>> to be silently missed by monitoring applications, which can lead to data
>> corruption.
> 
> Again, uffd-wp is a total mess. We shouldn't be in a position where its state
> being correctly retained relies on everybody always getting the subtle,
> uncommented, open-coded details right everywhere all the time.
> 
> But this is again a general comment... :)

:)

> 
>>
>> Preserve both the soft-dirty and uffd-wp bits from the old PTE when
>> creating the new zeropage mapping to ensure they are correctly tracked.
>>
>> Cc: <[email-masked]>
>> Fixes: b1f202060afe ("mm: remap unused subpages to shared zeropage when splitting isolated thp")
>> Suggested-by: David Hildenbrand <[email-masked]>
>> Suggested-by: Dev Jain <[email-masked]>
>> Acked-by: David Hildenbrand <[email-masked]>
>> Reviewed-by: Dev Jain <[email-masked]>
>> Signed-off-by: Lance Yang <[email-masked]>
> 
> Overall LGTM, so:
> 
> Reviewed-by: Lorenzo Stoakes <[email-masked]>

Cheers!

> 
>> ---
>> v4 -> v5:
>>   - Move ptep_get() call after the !pvmw.pte check, which handles PMD-mapped
>>     THP migration entries.
>>   - https://lore.kernel.org/linux-mm/[email-masked]/
>>
>> v3 -> v4:
>>   - Minor formatting tweak in try_to_map_unused_to_zeropage() function
>>     signature (per David and Dev)
>>   - Collect Reviewed-by from Dev - thanks!
>>   - https://lore.kernel.org/linux-mm/[email-masked]/
>>
>> v2 -> v3:
>>   - ptep_get() gets called only once per iteration (per Dev)
>>   - https://lore.kernel.org/linux-mm/[email-masked]/
>>
>> v1 -> v2:
>>   - Avoid calling ptep_get() multiple times (per Dev)
>>   - Double-check the uffd-wp bit (per David)
>>   - Collect Acked-by from David - thanks!
>>   - https://lore.kernel.org/linux-mm/[email-masked]/
>>
>>   mm/migrate.c | 15 ++++++++++-----
>>   1 file changed, 10 insertions(+), 5 deletions(-)
>>
>> diff --git a/mm/migrate.c b/mm/migrate.c
>> index ce83c2c3c287..e3065c9edb55 100644
>> --- a/mm/migrate.c
>> +++ b/mm/migrate.c
>> @@ -296,8 +296,7 @@ bool isolate_folio_to_list(struct folio *folio, struct list_head *list)
>>   }
>>
>>   static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>> -					  struct folio *folio,
>> -					  unsigned long idx)
>> +		struct folio *folio, pte_t old_pte, unsigned long idx)
>>   {
>>   	struct page *page = folio_page(folio, idx);
>>   	pte_t newpte;
>> @@ -306,7 +305,7 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>>   		return false;
>>   	VM_BUG_ON_PAGE(!PageAnon(page), page);
>>   	VM_BUG_ON_PAGE(!PageLocked(page), page);
>> -	VM_BUG_ON_PAGE(pte_present(ptep_get(pvmw->pte)), page);
>> +	VM_BUG_ON_PAGE(pte_present(old_pte), page);
> 
> Kinda ugly that we pass old_pte when it's avaiable via the shared state object,
> but probably nothing to really concern ourselves about.
> 
> Guess you could argue it both ways :)
> 
> It'd be good to convert these VM_BUG_ON_*() to VM_WARN_ON_*() but I guess that's

I agree.

> somewhat out of the scope of the code here and would be inconsistent to change
> it for just one condition.

Since this fix already landed in the mainline, just leave it as is here :)

Thanks,
Lance

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Date: Tue, 14 Oct 2025 13:45:33 +0200
From: [email-masked]
Subject: Re: [PATCH v2 2/2] media: az6007: refactor to properly use dvb-usb-v2
To: Jeongjun Park <[email-masked]>, [email-masked],
 [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked]
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Hi Jeongjun Park,

On 08/09/2025 17:07, Jeongjun Park wrote:
> The az6007 driver has long since transitioned from dvb-usb to dvb-usb-v2,
> but its implementation is still a mix of dvb-usb and dvb-usb-v2.
> 
> Addressing the various issues that arise from this requires comprehensive
> refactoring to transition to the dvb-usb-v2 implementation.

Since I dropped the previous patch, this patch doesn't apply anymore, so I'm dropping
it as well.

But in any case, this patch really needs to be tested on actual hardware.

> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=a43c95e5c2c9ed88e966

What does this syzkaller report have to do with refactoring? I think you're
mixing refactoring and fixing a bug.

Regards,

	Hans

> Fixes: 786baecfe78f ("[media] dvb-usb: move it to drivers/media/usb/dvb-usb")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
>  drivers/media/usb/dvb-usb-v2/az6007.c | 175 +++++++++++++-------------
>  1 file changed, 86 insertions(+), 89 deletions(-)
> 
> diff --git a/drivers/media/usb/dvb-usb-v2/az6007.c b/drivers/media/usb/dvb-usb-v2/az6007.c
> index 4202042bdb55..5517675fd0b1 100644
> --- a/drivers/media/usb/dvb-usb-v2/az6007.c
> +++ b/drivers/media/usb/dvb-usb-v2/az6007.c
> @@ -39,10 +39,10 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
>  #define AZ6007_READ_IR		0xb4
>  
>  struct az6007_device_state {
> -	struct mutex		mutex;
>  	struct mutex		ca_mutex;
>  	struct dvb_ca_en50221	ca;
>  	unsigned		warm:1;
> +	unsigned		ci_attached:1;
>  	int			(*gate_ctrl) (struct dvb_frontend *, int);
>  	unsigned char		data[4096];
>  };
> @@ -97,25 +97,30 @@ static struct mt2063_config az6007_mt2063_config = {
>  	.refclock = 36125000,
>  };
>  
> -static int __az6007_read(struct usb_device *udev, struct az6007_device_state *st,
> +static int __az6007_read(struct dvb_usb_device *d, struct az6007_device_state *st,
>  			    u8 req, u16 value, u16 index, u8 *b, int blen)
>  {
>  	int ret;
>  
> +	if (mutex_lock_interruptible(&d->usb_mutex) < 0)
> +		return -EAGAIN;
> +
>  	if (blen > sizeof(st->data)) {
>  		pr_err("az6007: tried to read %d bytes, but I2C max size is %lu bytes\n",
>  		       blen, sizeof(st->data));
> -		return -EOPNOTSUPP;
> +		ret = -EOPNOTSUPP;
> +		goto end_unlock;
>  	}
>  
> -	ret = usb_control_msg(udev,
> -			      usb_rcvctrlpipe(udev, 0),
> +	ret = usb_control_msg(d->udev,
> +			      usb_rcvctrlpipe(d->udev, 0),
>  			      req,
>  			      USB_TYPE_VENDOR | USB_DIR_IN,
>  			      value, index, b, blen, 5000);
>  	if (ret < 0) {
>  		pr_warn("usb read operation failed. (%d)\n", ret);
> -		return -EIO;
> +		ret = -EIO;
> +		goto end_unlock;
>  	}
>  
>  	if (az6007_xfer_debug) {
> @@ -125,6 +130,8 @@ static int __az6007_read(struct usb_device *udev, struct az6007_device_state *st
>  				     DUMP_PREFIX_NONE, b, blen);
>  	}
>  
> +end_unlock:
> +	mutex_unlock(&d->usb_mutex);
>  	return ret;
>  }
>  
> @@ -134,25 +141,24 @@ static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
>  	struct az6007_device_state *st = d_to_priv(d);
>  	int ret;
>  
> -	if (mutex_lock_interruptible(&st->mutex) < 0)
> -		return -EAGAIN;
> -
> -	ret = __az6007_read(d->udev, st, req, value, index, b, blen);
> -
> -	mutex_unlock(&st->mutex);
> +	ret = __az6007_read(d, st, req, value, index, b, blen);
>  
>  	return ret;
>  }
>  
> -static int __az6007_write(struct usb_device *udev, struct az6007_device_state *st,
> +static int __az6007_write(struct dvb_usb_device *d, struct az6007_device_state *st,
>  			    u8 req, u16 value, u16 index, u8 *b, int blen)
>  {
>  	int ret;
>  
> +	if (mutex_lock_interruptible(&d->usb_mutex) < 0)
> +		return -EAGAIN;
> +
>  	if (blen > sizeof(st->data)) {
>  		pr_err("az6007: tried to write %d bytes, but I2C max size is %lu bytes\n",
>  		       blen, sizeof(st->data));
> -		return -EOPNOTSUPP;
> +		ret = -EOPNOTSUPP;
> +		goto end_unlock;
>  	}
>  
>  	if (az6007_xfer_debug) {
> @@ -162,17 +168,21 @@ static int __az6007_write(struct usb_device *udev, struct az6007_device_state *s
>  				     DUMP_PREFIX_NONE, b, blen);
>  	}
>  
> -	ret = usb_control_msg(udev,
> -			      usb_sndctrlpipe(udev, 0),
> +	ret = usb_control_msg(d->udev,
> +			      usb_sndctrlpipe(d->udev, 0),
>  			      req,
>  			      USB_TYPE_VENDOR | USB_DIR_OUT,
>  			      value, index, b, blen, 5000);
>  	if (ret != blen) {
>  		pr_err("usb write operation failed. (%d)\n", ret);
> -		return -EIO;
> +		ret = -EIO;
> +		goto end_unlock;
>  	}
>  
> -	return 0;
> +	ret = 0;
> +end_unlock:
> +	mutex_unlock(&d->usb_mutex);
> +	return ret;
>  }
>  
>  static int az6007_write(struct dvb_usb_device *d, u8 req, u16 value,
> @@ -181,12 +191,7 @@ static int az6007_write(struct dvb_usb_device *d, u8 req, u16 value,
>  	struct az6007_device_state *st = d_to_priv(d);
>  	int ret;
>  
> -	if (mutex_lock_interruptible(&st->mutex) < 0)
> -		return -EAGAIN;
> -
> -	ret = __az6007_write(d->udev, st, req, value, index, b, blen);
> -
> -	mutex_unlock(&st->mutex);
> +	ret = __az6007_write(d, st, req, value, index, b, blen);
>  
>  	return ret;
>  }
> @@ -580,10 +585,9 @@ static void az6007_ci_uninit(struct dvb_usb_device *d)
>  }
>  
>  
> -static int az6007_ci_init(struct dvb_usb_adapter *adap)
> +static int az6007_ci_init(struct dvb_usb_device *d)
>  {
> -	struct dvb_usb_device *d = adap_to_d(adap);
> -	struct az6007_device_state *state = adap_to_priv(adap);
> +	struct az6007_device_state *state = d_to_priv(d);
>  	int ret;
>  
>  	pr_debug("%s()\n", __func__);
> @@ -600,7 +604,7 @@ static int az6007_ci_init(struct dvb_usb_adapter *adap)
>  	state->ca.poll_slot_status	= az6007_ci_poll_slot_status;
>  	state->ca.data			= d;
>  
> -	ret = dvb_ca_en50221_init(&adap->dvb_adap,
> +	ret = dvb_ca_en50221_init(&d->adapter[0].dvb_adap,
>  				  &state->ca,
>  				  0, /* flags */
>  				  1);/* n_slots */
> @@ -610,6 +614,8 @@ static int az6007_ci_init(struct dvb_usb_adapter *adap)
>  		return ret;
>  	}
>  
> +	state->ci_attached = true;
> +
>  	pr_debug("CI initialized.\n");
>  
>  	return 0;
> @@ -646,8 +652,6 @@ static int az6007_frontend_attach(struct dvb_usb_adapter *adap)
>  	st->gate_ctrl = adap->fe[0]->ops.i2c_gate_ctrl;
>  	adap->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
>  
> -	az6007_ci_init(adap);
> -
>  	return 0;
>  }
>  
> @@ -667,8 +671,6 @@ static int az6007_cablestar_hdci_frontend_attach(struct dvb_usb_adapter *adap)
>  	st->gate_ctrl = adap->fe[0]->ops.i2c_gate_ctrl;
>  	adap->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
>  
> -	az6007_ci_init(adap);
> -
>  	return 0;
>  }
>  
> @@ -699,50 +701,55 @@ static int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
>  
>  	pr_debug("%s()\n", __func__);
>  
> -	if (!state->warm) {
> -		mutex_init(&state->mutex);
> +	mutex_lock(&d->i2c_mutex);
>  
> +	if (!state->warm) {
>  		ret = az6007_write(d, AZ6007_POWER, 0, 2, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  		msleep(60);
>  		ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  		msleep(100);
>  		ret = az6007_write(d, AZ6007_POWER, 1, 3, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  		msleep(20);
>  		ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  
>  		msleep(400);
>  		ret = az6007_write(d, FX2_SCON1, 0, 3, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  		msleep(150);
>  		ret = az6007_write(d, FX2_SCON1, 1, 3, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  		msleep(430);
>  		ret = az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
>  		if (ret < 0)
> -			return ret;
> +			goto end_unlock;
>  
>  		state->warm = true;
>  
> -		return 0;
> +		ret = 0;
> +		goto end_unlock;
>  	}
>  
> +	ret = 0;
> +
>  	if (!onoff)
> -		return 0;
> +		goto end_unlock;
>  
>  	az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
>  	az6007_write(d, AZ6007_TS_THROUGH, 0, 0, NULL, 0);
>  
> -	return 0;
> +end_unlock:
> +	mutex_unlock(&d->i2c_mutex);
> +	return ret;
>  }
>  
>  /* I2C */
> @@ -758,7 +765,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  	int length;
>  	u8 req, addr;
>  
> -	if (mutex_lock_interruptible(&st->mutex) < 0)
> +	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
>  		return -EAGAIN;
>  
>  	for (i = 0; i < num; i++) {
> @@ -781,7 +788,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			value = addr | (1 << 8);
>  			length = 6 + msgs[i + 1].len;
>  			len = msgs[i + 1].len;
> -			ret = __az6007_read(d->udev, st, req, value, index,
> +			ret = __az6007_read(d, st, req, value, index,
>  					    st->data, length);
>  			if (ret >= len) {
>  				for (j = 0; j < len; j++)
> @@ -802,7 +809,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			index = msgs[i].buf[0];
>  			value = addr | (1 << 8);
>  			length = msgs[i].len - 1;
> -			ret =  __az6007_write(d->udev, st, req, value, index,
> +			ret = __az6007_write(d, st, req, value, index,
>  					      &msgs[i].buf[1], length);
>  		} else {
>  			/* read bytes */
> @@ -818,7 +825,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			value = addr;
>  			length = msgs[i].len + 6;
>  			len = msgs[i].len;
> -			ret = __az6007_read(d->udev, st, req, value, index,
> +			ret = __az6007_read(d, st, req, value, index,
>  					    st->data, length);
>  			if (ret >= len) {
>  				for (j = 0; j < len; j++)
> @@ -829,7 +836,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			goto err;
>  	}
>  err:
> -	mutex_unlock(&st->mutex);
> +	mutex_unlock(&d->i2c_mutex);
>  
>  	if (ret < 0) {
>  		pr_info("%s ERROR: %i\n", __func__, ret);
> @@ -861,7 +868,7 @@ static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  		return -ENOMEM;
>  
>  	/* Try to read the mac address */
> -	ret = __az6007_read(d->udev, state, AZ6007_READ_DATA, 6, 0, mac, 6);
> +	ret = __az6007_read(d, state, AZ6007_READ_DATA, 6, 0, mac, 6);
>  	if (ret == 6)
>  		ret = WARM;
>  	else
> @@ -870,9 +877,9 @@ static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  	kfree(mac);
>  
>  	if (ret == COLD) {
> -		__az6007_write(d->udev, state, 0x09, 1, 0, NULL, 0);
> -		__az6007_write(d->udev, state, 0x00, 0, 0, NULL, 0);
> -		__az6007_write(d->udev, state, 0x00, 0, 0, NULL, 0);
> +		__az6007_write(d, state, 0x09, 1, 0, NULL, 0);
> +		__az6007_write(d, state, 0x00, 0, 0, NULL, 0);
> +		__az6007_write(d, state, 0x00, 0, 0, NULL, 0);
>  	}
>  
>  	pr_debug("Device is on %s state\n",
> @@ -880,13 +887,6 @@ static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  	return ret;
>  }
>  
> -static void az6007_usb_disconnect(struct usb_interface *intf)
> -{
> -	struct dvb_usb_device *d = usb_get_intfdata(intf);
> -	az6007_ci_uninit(d);
> -	dvb_usbv2_disconnect(intf);
> -}
> -
>  static int az6007_download_firmware(struct dvb_usb_device *d,
>  	const struct firmware *fw)
>  {
> @@ -895,6 +895,19 @@ static int az6007_download_firmware(struct dvb_usb_device *d,
>  	return cypress_load_firmware(d->udev, fw, CYPRESS_FX2);
>  }
>  
> +static int az6007_init(struct dvb_usb_device *d)
> +{
> +	return az6007_ci_init(d);
> +}
> +
> +static void az6007_exit(struct dvb_usb_device *d)
> +{
> +	struct az6007_device_state *state = d_to_priv(d);
> +
> +	if (state->ci_attached)
> +		az6007_ci_uninit(d);
> +}
> +
>  /* DVB USB Driver stuff */
>  static struct dvb_usb_device_properties az6007_props = {
>  	.driver_name         = KBUILD_MODNAME,
> @@ -912,6 +925,8 @@ static struct dvb_usb_device_properties az6007_props = {
>  	.download_firmware   = az6007_download_firmware,
>  	.identify_state	     = az6007_identify_state,
>  	.power_ctrl          = az6007_power_ctrl,
> +	.init                = az6007_init,
> +	.exit                = az6007_exit,
>  	.num_adapters        = 1,
>  	.adapter             = {
>  		{ .stream = DVB_USB_STREAM_BULK(0x02, 10, 4096), }
> @@ -935,6 +950,8 @@ static struct dvb_usb_device_properties az6007_cablestar_hdci_props = {
>  	.download_firmware   = az6007_download_firmware,
>  	.identify_state	     = az6007_identify_state,
>  	.power_ctrl          = az6007_power_ctrl,
> +	.init                = az6007_init,
> +	.exit                = az6007_exit,
>  	.num_adapters        = 1,
>  	.adapter             = {
>  		{ .stream = DVB_USB_STREAM_BULK(0x02, 10, 4096), }
> @@ -955,37 +972,17 @@ static const struct usb_device_id az6007_usb_table[] = {
>  
>  MODULE_DEVICE_TABLE(usb, az6007_usb_table);
>  
> -static int az6007_suspend(struct usb_interface *intf, pm_message_t msg)
> -{
> -	struct dvb_usb_device *d = usb_get_intfdata(intf);
> -
> -	az6007_ci_uninit(d);
> -	return dvb_usbv2_suspend(intf, msg);
> -}
> -
> -static int az6007_resume(struct usb_interface *intf)
> -{
> -	struct dvb_usb_device *d = usb_get_intfdata(intf);
> -	struct dvb_usb_adapter *adap = &d->adapter[0];
> -
> -	az6007_ci_init(adap);
> -	return dvb_usbv2_resume(intf);
> -}
> -
>  /* usb specific object needed to register this driver with the usb subsystem */
>  static struct usb_driver az6007_usb_driver = {
> -	.name		= KBUILD_MODNAME,
> -	.id_table	= az6007_usb_table,
> -	.probe		= dvb_usbv2_probe,
> -	.disconnect	= az6007_usb_disconnect,
> -	.no_dynamic_id	= 1,
> -	.soft_unbind	= 1,
> -	/*
> -	 * FIXME: need to implement reset_resume, likely with
> -	 * dvb-usb-v2 core support
> -	 */
> -	.suspend	= az6007_suspend,
> -	.resume		= az6007_resume,
> +	.name = KBUILD_MODNAME,
> +	.id_table = az6007_usb_table,
> +	.probe = dvb_usbv2_probe,
> +	.disconnect = dvb_usbv2_disconnect,
> +	.suspend = dvb_usbv2_suspend,
> +	.resume = dvb_usbv2_resume,
> +	.reset_resume = dvb_usbv2_reset_resume,
> +	.no_dynamic_id = 1,
> +	.soft_unbind = 1,
>  };
>  
>  module_usb_driver(az6007_usb_driver);
> --
> 

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Date: Tue, 14 Oct 2025 13:52:18 +0200
From: Jacopo Mondi <[email-masked]>
To: Hans Verkuil <[email-masked]>
Cc: Jacopo Mondi <[email-masked]>, 
	Andy Walls <[email-masked]>, Mauro Carvalho Chehab <[email-masked]>, 
	Laurent Pinchart <[email-masked]>, Dan Carpenter <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
Subject: Re: [PATCH v4 0/2] media: pci: Fix invalid access to file *
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Hi Hans

On Tue, Oct 14, 2025 at 09:05:20AM +0200, Hans Verkuil wrote:
> Hi Jacopo,
>
> On 19/08/2025 09:07, Jacopo Mondi wrote:
> > Since commits
> > 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
> > 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
> >
> > All the ioctl handlers access their private data structures
> > from file *
> >
> > The ivtv and cx18 drivers call the ioctl handlers from their
> > DVB layer without a valid file *, causing invalid memory access.
> >
> > The issue has been reported by smatch in
> > "[bug report] media: cx18: Access v4l2_fh from file"
> >
> > Fix this by providing wrappers for the ioctl handlers to be
> > used by the DVB layer that do not require a valid file *.
>
> This series should go to the fixes branch for v6.18, right?
> This looks like a pure regression, so I think that makes sense.
>

I think so, yes

> BTW, why is there a Link: tag in the cx18 patch? It just links to
> the v1 of the patch and that doesn't add meaningful information.
> Linus likes Link:, but only if it really adds useful information.

Good question. I presume it's probably a copy&paste error, as it has no
place in the patch.

Would you like me to resend or will you remove it ?

>
> Regards,
>
> 	Hans
>
> >
> > Signed-off-by: Jacopo Mondi <[email-masked]>
> > ---
> > Changes in v4:
> > - Slightly adjust commit messages
> > - Link to v3: https://lore.kernel.org/r/[email-masked]
> >
> > Changes in v3:
> > - Change helpers to accept the type they're going to operate on instead
> >   of using the open_id wrapper type as suggested by Laurent
> > - Link to v2: https://lore.kernel.org/r/[email-masked]
> >
> > Changes in v2:
> > - Add Cc: [email-masked] per-patch
> >
> > ---
> > Jacopo Mondi (2):
> >       media: cx18: Fix invalid access to file *
> >       media: ivtv: Fix invalid access to file *
> >
> >  drivers/media/pci/cx18/cx18-driver.c |  9 +++------
> >  drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
> >  drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
> >  drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
> >  drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
> >  drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
> >  6 files changed, 52 insertions(+), 34 deletions(-)
> > ---
> > base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc
> > change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde
> >
> > Best regards,
>

From - Fri Oct 17 14:26:19 2025
Delivery-date: Tue, 14 Oct 2025 11:56:15 +0000
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Date: Tue, 14 Oct 2025 20:55:42 +0900
From: Sergey Senozhatsky <[email-masked]>
To: Christian Loehle <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, Greg Kroah-Hartman <[email-masked]>, 
	Artem Bityutskiy <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], [email-masked], 
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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--57jnztgduo6ucqxa
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

On (25/10/14 11:25), Christian Loehle wrote:
> On 10/14/25 11:23, Sergey Senozhatsky wrote:
> > On (25/10/14 10:50), Christian Loehle wrote:
> >>> Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> >>> invalid recent intervals data") doesn't address the problems we are
> >>> observing.  Revert seems to be bringing performance metrics back to
> >>> pre-regression levels.
> >>
> >> Any details would be much appreciated.
> >> How do the idle state usages differ with and without
> >> "cpuidle: menu: Avoid discarding useful information"?
> >> What do the idle states look like in your platform?
> > 
> > Sure, I can run tests.  How do I get the numbers/stats
> > that you are asking for?
> 
> Ideally just dump
> cat /sys/devices/system/cpu/cpu*/cpuidle/state*/*
> before and after the test.

OK, got some data for you.  The terminology being used here is as follows:

- 6.1-base
  is 6.1 stable with a9edb700846 "cpuidle: menu: Avoid discarding useful information"

- 6.1-base-fixup
  is 6.1 stable with a9edb700846 and fa3fa55de0d6 "cpuidle: governors:
  menu: Avoid using invalid recent intervals data" cherry-pick

- 6.1-revert
  is 6.1 stable with a9edb700846 reverted (and no fixup commit, obviously)

Just to show the scale of regression, results of some of the benchmarks:

  6.1-base:		84.5
  6.1-base-fixup:	76.5
  6.1-revert:		59.5

  (lower is better, 6.1-revert has the same results as previous stable
  kernels).

Please find  /sys/devices/system/cpu/cpu*/cpuidle/state*/* dumps
attached (6 files).

The cpuidle/state*/* directory structure is as follows (NOTE: dumps
don't contain s2idle subdirs):

/sys/devices/system/cpu/cpu1/cpuidle/
|-- state0
|   |-- above
|   |-- below
|   |-- default_status
|   |-- desc
|   |-- disable
|   |-- latency
|   |-- name
|   |-- power
|   |-- rejected
|   |-- residency
|   |-- time
|   `-- usage
|-- state1
|   |-- above
|   |-- below
|   |-- default_status
|   |-- desc
|   |-- disable
|   |-- latency
|   |-- name
|   |-- power
|   |-- rejected
|   |-- residency
|   |-- s2idle
|   |   |-- time
|   |   `-- usage
|   |-- time
|   `-- usage
|-- state2
|   |-- above
|   |-- below
|   |-- default_status
|   |-- desc
|   |-- disable
|   |-- latency
|   |-- name
|   |-- power
|   |-- rejected
|   |-- residency
|   |-- s2idle
|   |   |-- time
|   |   `-- usage
|   |-- time
|   `-- usage
`-- state3
    |-- above
    |-- below
    |-- default_status
    |-- desc
    |-- disable
    |-- latency
    |-- name
    |-- power
    |-- rejected
    |-- residency
    |-- s2idle
    |   |-- time
    |   `-- usage
    |-- time
    `-- usage

Hope this helps.

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--57jnztgduo6ucqxa
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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 16:56:11 +0530
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], Ilya Leoshkevich <[email-masked]>, 
	Daniel Borkmann <[email-masked]>, Dan Carpenter <[email-masked]>, 
	Arnd Bergmann <[email-masked]>, Anders Roxell <[email-masked]>, 
	Ben Copeland <[email-masked]>, [email-masked], 
	Netdev <[email-masked]>, bpf <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
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On Mon, 13 Oct 2025 at 20:38, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.12.53 release.
> There are 262 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

The S390 defconfig builds failed on the Linux stable-rc 6.12.53-rc1
and 6.6.112-rc1 tag build due to following build warnings / errors
with gcc and clang toolchains.

Also seen on 6.6.112-rc1.

* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - clang-nightly-lkftconfig-hardening
  - clang-nightly-lkftconfig-lto-full
  - clang-nightly-lkftconfig-lto-thing
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-14-lkftconfig-hardening
  - gcc-8-defconfig-fe40093d
  - gcc-8-lkftconfig-hardening
  - korg-clang-21-lkftconfig-hardening
  - korg-clang-21-lkftconfig-lto-full
  - korg-clang-21-lkftconfig-lto-thing

First seen on 6.12.53-rc1
Good: v6.12.52
Bad: 6.12.53-rc1 also seen on 6.6.112-rc1

Regression Analysis:
- New regression? yes
- Reproducibility? yes

Build regressions: arch/s390/net/bpf_jit_comp.c:1813:49: error:
'struct bpf_jit' has no member named 'frame_off'

Reported-by: Linux Kernel Functional Testing <[email-masked]>

# Build error
arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
arch/s390/net/bpf_jit_comp.c:1813:49: error: 'struct bpf_jit' has no
member named 'frame_off'
 1813 |                         _EMIT6(0xd203f000 | (jit->frame_off +
      |                                                 ^~
arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
  211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
  211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
arch/s390/net/bpf_jit_comp.c:1814:46: note: in expansion of macro 'offsetof'
 1814 |                                              offsetof(struct prog_frame,
      |                                              ^~~~~~~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
  212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:1816:41: note: in expansion of macro 'offsetof'
 1816 |                                0xf000 | offsetof(struct prog_frame,
      |                                         ^~~~~~~~
arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
  212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:2813:33: note: in expansion of macro 'offsetof'
 2813 |                        0xf000 | offsetof(struct prog_frame,
tail_call_cnt));
      |                                 ^~~~~~~~
make[5]: *** [scripts/Makefile.build:229: arch/s390/net/bpf_jit_comp.o] Error 1

The git blame is pointing to,
 $ git blame -L 1813  arch/s390/net/bpf_jit_comp.c
   162513d7d81487 (Ilya Leoshkevich)    _EMIT6(0xd203f000 | (jit->frame_off +

Commit pointing to,
   s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
   [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

## Build
* kernel: 6.12.53-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: 7e50c0945b4ab1d4019f9905f6cf5350082c6a84
* git describe: v6.12.52-263-g7e50c0945b4a
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.52-263-g7e50c0945b4a

## Test Regressions (compared to v6.12.50-47-gf7ad21173a19)
* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - clang-nightly-lkftconfig-hardening
  - clang-nightly-lkftconfig-lto-full
  - clang-nightly-lkftconfig-lto-thing
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-14-lkftconfig-hardening
  - gcc-8-defconfig-fe40093d
  - gcc-8-lkftconfig-hardening
  - korg-clang-21-lkftconfig-hardening
  - korg-clang-21-lkftconfig-lto-full
  - korg-clang-21-lkftconfig-lto-thing

## Metric Regressions (compared to v6.12.50-47-gf7ad21173a19)

## Test Fixes (compared to v6.12.50-47-gf7ad21173a19)

## Metric Fixes (compared to v6.12.50-47-gf7ad21173a19)

## Test result summary
total: 152513, pass: 126770, fail: 5572, skip: 19634, xfail: 537

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 137 passed, 2 failed
* arm64: 57 total, 51 passed, 6 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 24 passed, 1 failed
* s390: 22 total, 8 passed, 14 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

From - Fri Oct 17 14:26:19 2025
Delivery-date: Tue, 14 Oct 2025 11:44:55 +0000
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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 17:14:30 +0530
Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], bpf <[email-masked]>, 
	Netdev <[email-masked]>, Ilya Leoshkevich <[email-masked]>, 
	Daniel Borkmann <[email-masked]>, Arnd Bergmann <[email-masked]>, 
	Ben Copeland <[email-masked]>, Anders Roxell <[email-masked]>, 
	Dan Carpenter <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
                             DNSWL was blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block
                              for more information.
                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 4

On Mon, 13 Oct 2025 at 20:28, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.112-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

The S390 defconfig builds failed on the Linux stable-rc 6.6.112-rc1
and 6.12.53-rc1 tag build due to following build warnings / errors
with gcc and clang toolchains.

Also seen on 6.12.53-rc1

First seen on 6.6.112-rc1
Good: v6.6.111
Bad: 6.6.112-rc1 also seen on 6.12.53-rc1

Regression Analysis:
- New regression? Yes
- Reproducibility? Yes

Build regressions: arch/s390/net/bpf_jit_comp.c:1463:49: error:
'struct bpf_jit' has no member named 'frame_off'

Reported-by: Linux Kernel Functional Testing <[email-masked]>

# Build error
arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
arch/s390/net/bpf_jit_comp.c:1463:49: error: 'struct bpf_jit' has no
member named 'frame_off'
 1463 |                         _EMIT6(0xd203f000 | (jit->frame_off +
      |                                                 ^~
arch/s390/net/bpf_jit_comp.c:208:55: note: in definition of macro '_EMIT6'
  208 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:208:55: note: in definition of macro '_EMIT6'
  208 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
arch/s390/net/bpf_jit_comp.c:1464:46: note: in expansion of macro 'offsetof'
 1464 |                                              offsetof(struct prog_frame,
      |                                              ^~~~~~~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:209:59: note: in definition of macro '_EMIT6'
  209 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:1466:41: note: in expansion of macro 'offsetof'
 1466 |                                0xf000 | offsetof(struct prog_frame,
      |                                         ^~~~~~~~
arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:209:59: note: in definition of macro '_EMIT6'
  209 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:2447:33: note: in expansion of macro 'offsetof'
 2447 |                        0xf000 | offsetof(struct prog_frame,
tail_call_cnt));
      |                                 ^~~~~~~~
make[5]: *** [scripts/Makefile.build:243: arch/s390/net/bpf_jit_comp.o] Error 1

The git blame is pointing to,
 $ git blame -L 1463 arch/s390/net/bpf_jit_comp.c
   987b48ef91346f Ilya Leoshkevich _EMIT6(0xd203f000 | (jit->frame_off +

Commit pointing to,
   s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
   [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

## Build
* kernel: 6.6.112-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: 07c1c4215e9202defca86827ce9e9c920c3596b9
* git describe: v6.6.111-197-g07c1c4215e92
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.111-197-g07c1c4215e92

## Test Regressions (compared to v6.6.109-37-g65af00078567)

* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-8-defconfig-fe40093d

## Metric Regressions (compared to v6.6.109-37-g65af00078567)

## Test Fixes (compared to v6.6.109-37-g65af00078567)

## Metric Fixes (compared to v6.6.109-37-g65af00078567)

## Test result summary
total: 131194, pass: 109732, fail: 4948, skip: 16043, xfail: 471

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 129 total, 128 passed, 1 failed
* arm64: 44 total, 40 passed, 4 failed
* i386: 23 total, 23 passed, 0 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 32 total, 31 passed, 1 failed
* riscv: 15 total, 14 passed, 1 failed
* s390: 14 total, 8 passed, 6 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 37 total, 34 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 17:14:30 +0530
Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], bpf <[email-masked]>, 
	Netdev <[email-masked]>, Ilya Leoshkevich <[email-masked]>, 
	Daniel Borkmann <[email-masked]>, Arnd Bergmann <[email-masked]>, 
	Ben Copeland <[email-masked]>, Anders Roxell <[email-masked]>, 
	Dan Carpenter <[email-masked]>
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On Mon, 13 Oct 2025 at 20:28, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.112-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

The S390 defconfig builds failed on the Linux stable-rc 6.6.112-rc1
and 6.12.53-rc1 tag build due to following build warnings / errors
with gcc and clang toolchains.

Also seen on 6.12.53-rc1

First seen on 6.6.112-rc1
Good: v6.6.111
Bad: 6.6.112-rc1 also seen on 6.12.53-rc1

Regression Analysis:
- New regression? Yes
- Reproducibility? Yes

Build regressions: arch/s390/net/bpf_jit_comp.c:1463:49: error:
'struct bpf_jit' has no member named 'frame_off'

Reported-by: Linux Kernel Functional Testing <[email-masked]>

# Build error
arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
arch/s390/net/bpf_jit_comp.c:1463:49: error: 'struct bpf_jit' has no
member named 'frame_off'
 1463 |                         _EMIT6(0xd203f000 | (jit->frame_off +
      |                                                 ^~
arch/s390/net/bpf_jit_comp.c:208:55: note: in definition of macro '_EMIT6'
  208 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:208:55: note: in definition of macro '_EMIT6'
  208 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
arch/s390/net/bpf_jit_comp.c:1464:46: note: in expansion of macro 'offsetof'
 1464 |                                              offsetof(struct prog_frame,
      |                                              ^~~~~~~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:209:59: note: in definition of macro '_EMIT6'
  209 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:1466:41: note: in expansion of macro 'offsetof'
 1466 |                                0xf000 | offsetof(struct prog_frame,
      |                                         ^~~~~~~~
arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:209:59: note: in definition of macro '_EMIT6'
  209 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:2447:33: note: in expansion of macro 'offsetof'
 2447 |                        0xf000 | offsetof(struct prog_frame,
tail_call_cnt));
      |                                 ^~~~~~~~
make[5]: *** [scripts/Makefile.build:243: arch/s390/net/bpf_jit_comp.o] Error 1

The git blame is pointing to,
 $ git blame -L 1463 arch/s390/net/bpf_jit_comp.c
   987b48ef91346f Ilya Leoshkevich _EMIT6(0xd203f000 | (jit->frame_off +

Commit pointing to,
   s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
   [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

## Build
* kernel: 6.6.112-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: 07c1c4215e9202defca86827ce9e9c920c3596b9
* git describe: v6.6.111-197-g07c1c4215e92
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.111-197-g07c1c4215e92

## Test Regressions (compared to v6.6.109-37-g65af00078567)

* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-8-defconfig-fe40093d

## Metric Regressions (compared to v6.6.109-37-g65af00078567)

## Test Fixes (compared to v6.6.109-37-g65af00078567)

## Metric Fixes (compared to v6.6.109-37-g65af00078567)

## Test result summary
total: 131194, pass: 109732, fail: 4948, skip: 16043, xfail: 471

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 129 total, 128 passed, 1 failed
* arm64: 44 total, 40 passed, 4 failed
* i386: 23 total, 23 passed, 0 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 32 total, 31 passed, 1 failed
* riscv: 15 total, 14 passed, 1 failed
* s390: 14 total, 8 passed, 6 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 37 total, 34 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

From - Fri Oct 17 14:26:19 2025
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Date: Tue, 14 Oct 2025 20:08:39 +0900
From: Sergey Senozhatsky <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, Artem Bityutskiy <[email-masked]>, 
	Christian Loehle <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], [email-masked], 
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On (25/10/14 10:02), Greg Kroah-Hartman wrote:
> The point is still the same, commit fa3fa55de0d6 ("cpuidle: governors:
> menu: Avoid using invalid recent intervals data"), is not backported to
> 6.1.y, it is however in the following released kernels:
> 	5.10.241 5.15.190 6.6.103 6.12.43 6.15.11 6.16.2 6.17
> so something got lost in our trees and it needs to be backported.

I can send a backport for 6.1, unless someone else wants to do it
(or is already on it).

From - Fri Oct 17 14:26:19 2025
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Date: Tue, 14 Oct 2025 12:19:11 +0100
From: Lorenzo Stoakes <[email-masked]>
To: Lance Yang <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked]
Subject: Re: [PATCH v5 1/1] mm/rmap: fix soft-dirty and uffd-wp bit loss when
 remapping zero-filled mTHP subpage to shared zeropage
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Feels like the mTHP implementation is hitting up on the buffers of the THP code
being something of a mess... :)

On Tue, Sep 30, 2025 at 04:10:40PM +0800, Lance Yang wrote:
> From: Lance Yang <[email-masked]>
>
> When splitting an mTHP and replacing a zero-filled subpage with the shared
> zeropage, try_to_map_unused_to_zeropage() currently drops several important
> PTE bits.
>
> For userspace tools like CRIU, which rely on the soft-dirty mechanism for

It's slightly by-the-by, but CRIU in my view - as it relies on kernel
implementation details that can always change to operate - is not actually
something we have to strictly keep working.

HOWEVER, if we can reasonably do so without causing issues for us in the kernel
we ought to do so.

> incremental snapshots, losing the soft-dirty bit means modified pages are
> missed, leading to inconsistent memory state after restore.
>
> As pointed out by David, the more critical uffd-wp bit is also dropped.
> This breaks the userfaultfd write-protection mechanism, causing writes
> to be silently missed by monitoring applications, which can lead to data
> corruption.

Again, uffd-wp is a total mess. We shouldn't be in a position where its state
being correctly retained relies on everybody always getting the subtle,
uncommented, open-coded details right everywhere all the time.

But this is again a general comment... :)

>
> Preserve both the soft-dirty and uffd-wp bits from the old PTE when
> creating the new zeropage mapping to ensure they are correctly tracked.
>
> Cc: <[email-masked]>
> Fixes: b1f202060afe ("mm: remap unused subpages to shared zeropage when splitting isolated thp")
> Suggested-by: David Hildenbrand <[email-masked]>
> Suggested-by: Dev Jain <[email-masked]>
> Acked-by: David Hildenbrand <[email-masked]>
> Reviewed-by: Dev Jain <[email-masked]>
> Signed-off-by: Lance Yang <[email-masked]>

Overall LGTM, so:

Reviewed-by: Lorenzo Stoakes <[email-masked]>

> ---
> v4 -> v5:
>  - Move ptep_get() call after the !pvmw.pte check, which handles PMD-mapped
>    THP migration entries.
>  - https://lore.kernel.org/linux-mm/[email-masked]/
>
> v3 -> v4:
>  - Minor formatting tweak in try_to_map_unused_to_zeropage() function
>    signature (per David and Dev)
>  - Collect Reviewed-by from Dev - thanks!
>  - https://lore.kernel.org/linux-mm/[email-masked]/
>
> v2 -> v3:
>  - ptep_get() gets called only once per iteration (per Dev)
>  - https://lore.kernel.org/linux-mm/[email-masked]/
>
> v1 -> v2:
>  - Avoid calling ptep_get() multiple times (per Dev)
>  - Double-check the uffd-wp bit (per David)
>  - Collect Acked-by from David - thanks!
>  - https://lore.kernel.org/linux-mm/[email-masked]/
>
>  mm/migrate.c | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index ce83c2c3c287..e3065c9edb55 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -296,8 +296,7 @@ bool isolate_folio_to_list(struct folio *folio, struct list_head *list)
>  }
>
>  static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
> -					  struct folio *folio,
> -					  unsigned long idx)
> +		struct folio *folio, pte_t old_pte, unsigned long idx)
>  {
>  	struct page *page = folio_page(folio, idx);
>  	pte_t newpte;
> @@ -306,7 +305,7 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>  		return false;
>  	VM_BUG_ON_PAGE(!PageAnon(page), page);
>  	VM_BUG_ON_PAGE(!PageLocked(page), page);
> -	VM_BUG_ON_PAGE(pte_present(ptep_get(pvmw->pte)), page);
> +	VM_BUG_ON_PAGE(pte_present(old_pte), page);

Kinda ugly that we pass old_pte when it's avaiable via the shared state object,
but probably nothing to really concern ourselves about.

Guess you could argue it both ways :)

It'd be good to convert these VM_BUG_ON_*() to VM_WARN_ON_*() but I guess that's
somewhat out of the scope of the code here and would be inconsistent to change
it for just one condition.

>
>  	if (folio_test_mlocked(folio) || (pvmw->vma->vm_flags & VM_LOCKED) ||
>  	    mm_forbids_zeropage(pvmw->vma->vm_mm))
> @@ -322,6 +321,12 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>
>  	newpte = pte_mkspecial(pfn_pte(my_zero_pfn(pvmw->address),
>  					pvmw->vma->vm_page_prot));
> +
> +	if (pte_swp_soft_dirty(old_pte))
> +		newpte = pte_mksoft_dirty(newpte);
> +	if (pte_swp_uffd_wp(old_pte))
> +		newpte = pte_mkuffd_wp(newpte);
> +
>  	set_pte_at(pvmw->vma->vm_mm, pvmw->address, pvmw->pte, newpte);
>
>  	dec_mm_counter(pvmw->vma->vm_mm, mm_counter(folio));
> @@ -364,13 +369,13 @@ static bool remove_migration_pte(struct folio *folio,
>  			continue;
>  		}
>  #endif
> +		old_pte = ptep_get(pvmw.pte);
>  		if (rmap_walk_arg->map_unused_to_zeropage &&
> -		    try_to_map_unused_to_zeropage(&pvmw, folio, idx))
> +		    try_to_map_unused_to_zeropage(&pvmw, folio, old_pte, idx))
>  			continue;
>
>  		folio_get(folio);
>  		pte = mk_pte(new, READ_ONCE(vma->vm_page_prot));
> -		old_pte = ptep_get(pvmw.pte);
>
>  		entry = pte_to_swp_entry(old_pte);
>  		if (!is_migration_entry_young(entry))
> --
> 2.49.0
>

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Date: Tue, 14 Oct 2025 16:56:11 +0530
Subject: Re: [PATCH 6.12 000/262] 6.12.53-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
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	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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On Mon, 13 Oct 2025 at 20:38, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.12.53 release.
> There are 262 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.53-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

The S390 defconfig builds failed on the Linux stable-rc 6.12.53-rc1
and 6.6.112-rc1 tag build due to following build warnings / errors
with gcc and clang toolchains.

Also seen on 6.6.112-rc1.

* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - clang-nightly-lkftconfig-hardening
  - clang-nightly-lkftconfig-lto-full
  - clang-nightly-lkftconfig-lto-thing
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-14-lkftconfig-hardening
  - gcc-8-defconfig-fe40093d
  - gcc-8-lkftconfig-hardening
  - korg-clang-21-lkftconfig-hardening
  - korg-clang-21-lkftconfig-lto-full
  - korg-clang-21-lkftconfig-lto-thing

First seen on 6.12.53-rc1
Good: v6.12.52
Bad: 6.12.53-rc1 also seen on 6.6.112-rc1

Regression Analysis:
- New regression? yes
- Reproducibility? yes

Build regressions: arch/s390/net/bpf_jit_comp.c:1813:49: error:
'struct bpf_jit' has no member named 'frame_off'

Reported-by: Linux Kernel Functional Testing <[email-masked]>

# Build error
arch/s390/net/bpf_jit_comp.c: In function 'bpf_jit_insn':
arch/s390/net/bpf_jit_comp.c:1813:49: error: 'struct bpf_jit' has no
member named 'frame_off'
 1813 |                         _EMIT6(0xd203f000 | (jit->frame_off +
      |                                                 ^~
arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
  211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:211:55: note: in definition of macro '_EMIT6'
  211 |                 *(u32 *) (jit->prg_buf + jit->prg) = (op1);     \
      |                                                       ^~~
arch/s390/net/bpf_jit_comp.c:1814:46: note: in expansion of macro 'offsetof'
 1814 |                                              offsetof(struct prog_frame,
      |                                              ^~~~~~~~
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
  212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:1816:41: note: in expansion of macro 'offsetof'
 1816 |                                0xf000 | offsetof(struct prog_frame,
      |                                         ^~~~~~~~
arch/s390/net/bpf_jit_comp.c: In function '__arch_prepare_bpf_trampoline':
include/linux/stddef.h:16:33: error: invalid use of undefined type
'struct prog_frame'
   16 | #define offsetof(TYPE, MEMBER)  __builtin_offsetof(TYPE, MEMBER)
      |                                 ^~~~~~~~~~~~~~~~~~
arch/s390/net/bpf_jit_comp.c:212:59: note: in definition of macro '_EMIT6'
  212 |                 *(u16 *) (jit->prg_buf + jit->prg + 4) = (op2); \
      |                                                           ^~~
arch/s390/net/bpf_jit_comp.c:2813:33: note: in expansion of macro 'offsetof'
 2813 |                        0xf000 | offsetof(struct prog_frame,
tail_call_cnt));
      |                                 ^~~~~~~~
make[5]: *** [scripts/Makefile.build:229: arch/s390/net/bpf_jit_comp.o] Error 1

The git blame is pointing to,
 $ git blame -L 1813  arch/s390/net/bpf_jit_comp.c
   162513d7d81487 (Ilya Leoshkevich)    _EMIT6(0xd203f000 | (jit->frame_off +

Commit pointing to,
   s390/bpf: Write back tail call counter for BPF_PSEUDO_CALL
   [ Upstream commit c861a6b147137d10b5ff88a2c492ba376cd1b8b0 ]

## Build
* kernel: 6.12.53-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: 7e50c0945b4ab1d4019f9905f6cf5350082c6a84
* git describe: v6.12.52-263-g7e50c0945b4a
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.52-263-g7e50c0945b4a

## Test Regressions (compared to v6.12.50-47-gf7ad21173a19)
* s390, build
  - clang-21-defconfig
  - clang-nightly-defconfig
  - clang-nightly-lkftconfig-hardening
  - clang-nightly-lkftconfig-lto-full
  - clang-nightly-lkftconfig-lto-thing
  - gcc-14-allmodconfig
  - gcc-14-defconfig
  - gcc-14-lkftconfig-hardening
  - gcc-8-defconfig-fe40093d
  - gcc-8-lkftconfig-hardening
  - korg-clang-21-lkftconfig-hardening
  - korg-clang-21-lkftconfig-lto-full
  - korg-clang-21-lkftconfig-lto-thing

## Metric Regressions (compared to v6.12.50-47-gf7ad21173a19)

## Test Fixes (compared to v6.12.50-47-gf7ad21173a19)

## Metric Fixes (compared to v6.12.50-47-gf7ad21173a19)

## Test result summary
total: 152513, pass: 126770, fail: 5572, skip: 19634, xfail: 537

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 137 passed, 2 failed
* arm64: 57 total, 51 passed, 6 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 24 passed, 1 failed
* s390: 22 total, 8 passed, 14 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

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Date: Tue, 14 Oct 2025 19:23:31 +0900
From: Sergey Senozhatsky <[email-masked]>
To: Christian Loehle <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, Greg Kroah-Hartman <[email-masked]>, 
	Artem Bityutskiy <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], [email-masked], 
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On (25/10/14 10:50), Christian Loehle wrote:
> > Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> > invalid recent intervals data") doesn't address the problems we are
> > observing.  Revert seems to be bringing performance metrics back to
> > pre-regression levels.
> 
> Any details would be much appreciated.
> How do the idle state usages differ with and without
> "cpuidle: menu: Avoid discarding useful information"?
> What do the idle states look like in your platform?

Sure, I can run tests.  How do I get the numbers/stats
that you are asking for?

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Date: Tue, 14 Oct 2025 11:25:07 +0100
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
To: Sergey Senozhatsky <[email-masked]>
Cc: "Rafael J. Wysocki" <[email-masked]>,
 Greg Kroah-Hartman <[email-masked]>,
 Artem Bityutskiy <[email-masked]>,
 Sasha Levin <[email-masked]>, Daniel Lezcano <[email-masked]>,
 [email-masked], [email-masked],
 Tomasz Figa <[email-masked]>, [email-masked]
From: Christian Loehle <[email-masked]>
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On 10/14/25 11:23, Sergey Senozhatsky wrote:
> On (25/10/14 10:50), Christian Loehle wrote:
>>> Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
>>> invalid recent intervals data") doesn't address the problems we are
>>> observing.  Revert seems to be bringing performance metrics back to
>>> pre-regression levels.
>>
>> Any details would be much appreciated.
>> How do the idle state usages differ with and without
>> "cpuidle: menu: Avoid discarding useful information"?
>> What do the idle states look like in your platform?
> 
> Sure, I can run tests.  How do I get the numbers/stats
> that you are asking for?

Ideally just dump
cat /sys/devices/system/cpu/cpu*/cpuidle/state*/*
before and after the test.

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Date: Tue, 14 Oct 2025 03:43:06 -0700
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
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From: Ron Economos <[email-masked]>
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On 10/13/25 07:37, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.3-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

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Date: Tue, 14 Oct 2025 13:03:08 +0200
From: [email-masked]
Subject: Re: [PATCH v2 1/2] media: az6007: fix out-of-bounds in
 az6007_i2c_xfer()
To: Jeongjun Park <[email-masked]>, [email-masked],
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On 08/09/2025 17:07, Jeongjun Park wrote:
> Because the blen is not properly bounds-checked in __az6007_read/write,
> it is easy to get out-of-bounds errors in az6007_i2c_xfer later.
> 
> Therefore, we need to add bounds-checking to __az6007_read/write to
> resolve this.
> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=0192952caa411a3be209
> Fixes: 786baecfe78f ("[media] dvb-usb: move it to drivers/media/usb/dvb-usb")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
> v2: Change to fix the root cause of oob
> - Link to v1: https://lore.kernel.org/all/[email-masked]/
> ---
>  drivers/media/usb/dvb-usb-v2/az6007.c | 62 +++++++++++++++------------
>  1 file changed, 34 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/media/usb/dvb-usb-v2/az6007.c b/drivers/media/usb/dvb-usb-v2/az6007.c
> index 65ef045b74ca..4202042bdb55 100644
> --- a/drivers/media/usb/dvb-usb-v2/az6007.c
> +++ b/drivers/media/usb/dvb-usb-v2/az6007.c
> @@ -97,11 +97,17 @@ static struct mt2063_config az6007_mt2063_config = {
>  	.refclock = 36125000,
>  };
>  
> -static int __az6007_read(struct usb_device *udev, u8 req, u16 value,
> -			    u16 index, u8 *b, int blen)
> +static int __az6007_read(struct usb_device *udev, struct az6007_device_state *st,
> +			    u8 req, u16 value, u16 index, u8 *b, int blen)
>  {
>  	int ret;
>  
> +	if (blen > sizeof(st->data)) {
> +		pr_err("az6007: tried to read %d bytes, but I2C max size is %lu bytes\n",
> +		       blen, sizeof(st->data));
> +		return -EOPNOTSUPP;
> +	}
> +

Hmm, but the pointer 'b' doesn't always point to st->data, so it makes no sense to
check against it.

>  	ret = usb_control_msg(udev,
>  			      usb_rcvctrlpipe(udev, 0),
>  			      req,
> @@ -125,24 +131,30 @@ static int __az6007_read(struct usb_device *udev, u8 req, u16 value,
>  static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
>  			    u16 index, u8 *b, int blen)
>  {
> -	struct az6007_device_state *st = d->priv;
> +	struct az6007_device_state *st = d_to_priv(d);
>  	int ret;
>  
>  	if (mutex_lock_interruptible(&st->mutex) < 0)
>  		return -EAGAIN;
>  
> -	ret = __az6007_read(d->udev, req, value, index, b, blen);
> +	ret = __az6007_read(d->udev, st, req, value, index, b, blen);
>  
>  	mutex_unlock(&st->mutex);
>  
>  	return ret;
>  }
>  
> -static int __az6007_write(struct usb_device *udev, u8 req, u16 value,
> -			     u16 index, u8 *b, int blen)
> +static int __az6007_write(struct usb_device *udev, struct az6007_device_state *st,
> +			    u8 req, u16 value, u16 index, u8 *b, int blen)
>  {
>  	int ret;
>  
> +	if (blen > sizeof(st->data)) {
> +		pr_err("az6007: tried to write %d bytes, but I2C max size is %lu bytes\n",
> +		       blen, sizeof(st->data));
> +		return -EOPNOTSUPP;
> +	}
> +

This makes no sense...

>  	if (az6007_xfer_debug) {
>  		printk(KERN_DEBUG "az6007: OUT req: %02x, value: %04x, index: %04x\n",
>  		       req, value, index);
> @@ -150,12 +162,6 @@ static int __az6007_write(struct usb_device *udev, u8 req, u16 value,
>  				     DUMP_PREFIX_NONE, b, blen);
>  	}
>  
> -	if (blen > 64) {
> -		pr_err("az6007: tried to write %d bytes, but I2C max size is 64 bytes\n",
> -		       blen);
> -		return -EOPNOTSUPP;
> -	}
> -

...since it is capped at 64 bytes anyway. So just keep this check since it is more stringent
than sizeof(st->data).

Also, 'b' doesn't always point to st->data, so it makes no sense.

I think this is all overkill.

There are only a few places in this driver where you are reading or writing to/from a
buffer. In most cases the length is hardcoded and clearly fits inside the buffer.

Only is a few places do you need to check that the length <= sizeof(st->data), and
that should just be added as an extra check.

Note that the msg buffers (msg[i].buf) passed to az6007_i2c_xfer are guaranteed to
have the right size for the length (msg[i].len). So you only need to check when
using st->data as the buffer.

Sorry for basically going back to the first patch (almost).

Regards,

	Hans

>  	ret = usb_control_msg(udev,
>  			      usb_sndctrlpipe(udev, 0),
>  			      req,
> @@ -172,13 +178,13 @@ static int __az6007_write(struct usb_device *udev, u8 req, u16 value,
>  static int az6007_write(struct dvb_usb_device *d, u8 req, u16 value,
>  			    u16 index, u8 *b, int blen)
>  {
> -	struct az6007_device_state *st = d->priv;
> +	struct az6007_device_state *st = d_to_priv(d);
>  	int ret;
>  
>  	if (mutex_lock_interruptible(&st->mutex) < 0)
>  		return -EAGAIN;
>  
> -	ret = __az6007_write(d->udev, req, value, index, b, blen);
> +	ret = __az6007_write(d->udev, st, req, value, index, b, blen);
>  
>  	mutex_unlock(&st->mutex);
>  
> @@ -775,7 +781,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			value = addr | (1 << 8);
>  			length = 6 + msgs[i + 1].len;
>  			len = msgs[i + 1].len;
> -			ret = __az6007_read(d->udev, req, value, index,
> +			ret = __az6007_read(d->udev, st, req, value, index,
>  					    st->data, length);
>  			if (ret >= len) {
>  				for (j = 0; j < len; j++)
> @@ -788,7 +794,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			if (az6007_xfer_debug)
>  				printk(KERN_DEBUG "az6007: I2C W addr=0x%x len=%d\n",
>  				       addr, msgs[i].len);
> -			if (msgs[i].len < 1) {
> +			if (msgs[i].len < 1 && msgs[i].len > 64) {
>  				ret = -EIO;
>  				goto err;
>  			}
> @@ -796,11 +802,8 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			index = msgs[i].buf[0];
>  			value = addr | (1 << 8);
>  			length = msgs[i].len - 1;
> -			len = msgs[i].len - 1;
> -			for (j = 0; j < len; j++)
> -				st->data[j] = msgs[i].buf[j + 1];
> -			ret =  __az6007_write(d->udev, req, value, index,
> -					      st->data, length);
> +			ret =  __az6007_write(d->udev, st, req, value, index,
> +					      &msgs[i].buf[1], length);
>  		} else {
>  			/* read bytes */
>  			if (az6007_xfer_debug)
> @@ -815,10 +818,12 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
>  			value = addr;
>  			length = msgs[i].len + 6;
>  			len = msgs[i].len;
> -			ret = __az6007_read(d->udev, req, value, index,
> +			ret = __az6007_read(d->udev, st, req, value, index,
>  					    st->data, length);
> -			for (j = 0; j < len; j++)
> -				msgs[i].buf[j] = st->data[j + 5];
> +			if (ret >= len) {
> +				for (j = 0; j < len; j++)
> +					msgs[i].buf[j] = st->data[j + 5];
> +			}
>  		}
>  		if (ret < 0)
>  			goto err;
> @@ -845,6 +850,7 @@ static const struct i2c_algorithm az6007_i2c_algo = {
>  
>  static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  {
> +	struct az6007_device_state *state = d_to_priv(d);
>  	int ret;
>  	u8 *mac;
>  
> @@ -855,7 +861,7 @@ static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  		return -ENOMEM;
>  
>  	/* Try to read the mac address */
> -	ret = __az6007_read(d->udev, AZ6007_READ_DATA, 6, 0, mac, 6);
> +	ret = __az6007_read(d->udev, state, AZ6007_READ_DATA, 6, 0, mac, 6);
>  	if (ret == 6)
>  		ret = WARM;
>  	else
> @@ -864,9 +870,9 @@ static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
>  	kfree(mac);
>  
>  	if (ret == COLD) {
> -		__az6007_write(d->udev, 0x09, 1, 0, NULL, 0);
> -		__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
> -		__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
> +		__az6007_write(d->udev, state, 0x09, 1, 0, NULL, 0);
> +		__az6007_write(d->udev, state, 0x00, 0, 0, NULL, 0);
> +		__az6007_write(d->udev, state, 0x00, 0, 0, NULL, 0);
>  	}
>  
>  	pr_debug("Device is on %s state\n",
> --
> 

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Date: Tue, 14 Oct 2025 11:11:25 +0100
From: David Laight <[email-masked]>
To: Geert Uytterhoeven <[email-masked]>
Cc: Andrew Morton <[email-masked]>, Lance Yang
 <[email-masked]>, Eero Tamminen <[email-masked]>, Kent Overstreet
 <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], Finn Thain
 <[email-masked]>, [email-masked], [email-masked],
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Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Thu, 9 Oct 2025 09:11:06 +0200
Geert Uytterhoeven <[email-masked]> wrote:

> Hi Andrew,
> 
> On Thu, 9 Oct 2025 at 06:04, Andrew Morton <[email-masked]> wrote:
> > On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang <[email-masked]> wrote:  
> > > I think we fundamentally disagree on whether this fix for known
> > > false-positive warnings is needed for -stable.  
> >
> > Having the kernel send scary warnings to our users is really bad
> > behavior.  And if we don't fix it, people will keep reporting it.  
> 
> As the issue is present in v6.16 and v6.17, I think that warrants -stable.
> 
> > And removing a WARN_ON is a perfectly good way of fixing it.  The
> > kernel has 19,000 WARNs, probably seven of which are useful :(  
> 
> Right. And there is panic_on_warn...

Which, like panic_on_oops, panics before syslogd has a chance to write
the error message to /var/log/kernel.
Both are set in some environments.

Tracking down those crashes is a right PITA.

	David

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email-masked]
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
> 

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Date: Tue, 14 Oct 2025 11:15:11 +0100
From: Matt Fleming <[email-masked]>
To: K Prateek Nayak <[email-masked]>
Cc: John Stultz <[email-masked]>, Ingo Molnar <[email-masked]>,
	Peter Zijlstra <[email-masked]>,
	Juri Lelli <[email-masked]>,
	Vincent Guittot <[email-masked]>,
	Dietmar Eggemann <[email-masked]>,
	Steven Rostedt <[email-masked]>,
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	[email-masked], [email-masked],
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	Oleg Nesterov <[email-masked]>,
	Chris Arges <[email-masked]>, [email-masked]
Subject: Re: [PATCH] Revert "sched/core: Tweak wait_task_inactive() to force
 dequeue sched_delayed tasks"
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On Mon, Sep 29, 2025 at 09:23:06AM +0530, K Prateek Nayak wrote:
> 
> Thank you for testing the diff. I see Ingo has already posted the
> scheduler pull for v6.18 which indirectly solves this by removing those
> early returns.
> 
> Once that lands, I'll attach a formal commit log and send out a patch
> targeting the stable kernels >= 6.12.

Hey Prateek, I see the merge window is closed. Do you have plans to
submit a patch for stable now?

From - Fri Oct 17 14:26:19 2025
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Date: Tue, 14 Oct 2025 13:23:00 +0300
From: Dmitry Baryshkov <[email-masked]>
To: Abel Vesa <[email-masked]>
Cc: Vinod Koul <[email-masked]>, Kishon Vijay Abraham I <[email-masked]>,
        Rob Herring <[email-masked]>,
        Krzysztof Kozlowski <[email-masked]>,
        Conor Dooley <[email-masked]>,
        Bjorn Andersson <[email-masked]>,
        Dmitry Baryshkov <[email-masked]>,
        Konrad Dybcio <[email-masked]>,
        Sibi Sankar <[email-masked]>,
        Rajendra Nayak <[email-masked]>,
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        Neil Armstrong <[email-masked]>,
        [email-masked], [email-masked],
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Subject: Re: [PATCH RESEND v3 2/3] phy: qcom: edp: Make the number of clocks
 flexible
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On Tue, Oct 14, 2025 at 12:46:04PM +0300, Abel Vesa wrote:
> On X Elite, the DP PHY needs another clock called ref, while all other
> platforms do not.
> 
> The current X Elite devices supported upstream work fine without this
> clock, because the boot firmware leaves this clock enabled. But we should
> not rely on that. Also, even though this change breaks the ABI, it is
> needed in order to make the driver disables this clock along with the
> other ones, for a proper bring-down of the entire PHY.
> 
> So in order to handle these clocks on different platforms, make the driver
> get all the clocks regardless of how many there are provided.
> 
> Cc: [email-masked] # v6.10
> Fixes: db83c107dc29 ("phy: qcom: edp: Add v6 specific ops and X1E80100 platform support")
> Signed-off-by: Abel Vesa <[email-masked]>
> ---
>  drivers/phy/qualcomm/phy-qcom-edp.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <[email-masked]>

-- 
With best wishes
Dmitry

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Date: Tue, 14 Oct 2025 13:23:19 +0300
From: Dmitry Baryshkov <[email-masked]>
To: Abel Vesa <[email-masked]>
Cc: Vinod Koul <[email-masked]>, Kishon Vijay Abraham I <[email-masked]>,
        Rob Herring <[email-masked]>,
        Krzysztof Kozlowski <[email-masked]>,
        Conor Dooley <[email-masked]>,
        Bjorn Andersson <[email-masked]>,
        Dmitry Baryshkov <[email-masked]>,
        Konrad Dybcio <[email-masked]>,
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        Rajendra Nayak <[email-masked]>,
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        Neil Armstrong <[email-masked]>,
        [email-masked], [email-masked],
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Subject: Re: [PATCH RESEND v3 3/3] arm64: dts: qcom: Add missing TCSR ref
 clock to the DP PHYs
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On Tue, Oct 14, 2025 at 12:46:05PM +0300, Abel Vesa wrote:
> The DP PHYs on X1E80100 need the ref clock which is provided by the
> TCSR CC.
> 
> The current X Elite devices supported upstream work fine without this
> clock, because the boot firmware leaves this clock enabled. But we should
> not rely on that. Also, even though this change breaks the ABI, it is
> needed in order to make the driver disables this clock along with the
> other ones, for a proper bring-down of the entire PHY.
> 
> So lets attach it to each of the DP PHYs in order to do that.
> 
> Cc: [email-masked] # v6.9
> Fixes: 1940c25eaa63 ("arm64: dts: qcom: x1e80100: Add display nodes")
> Signed-off-by: Abel Vesa <[email-masked]>
> ---
>  arch/arm64/boot/dts/qcom/x1e80100.dtsi | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <[email-masked]>

-- 
With best wishes
Dmitry

From - Fri Oct 17 14:26:19 2025
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From: Bibo Mao <[email-masked]>
To: Tianrui Zhao <[email-masked]>,
	Huacai Chen <[email-masked]>,
	Xianglai Li <[email-masked]>
Cc: [email-masked],
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Subject: [PATCH] LoongArch: KVM: Fix max supported vCPUs set with eiointc
Date: Tue, 14 Oct 2025 17:50:55 +0800
X-CM-TRANSID:qMiowJBxTMEBHe5o+V3hAA--.48048S2
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VM fails to boot with 256 vCPUs, the detailed command is
qemu-system-loongarch64 -smp 256 and there is error reported as follows:
  KVM_LOONGARCH_EXTIOI_INIT_NUM_CPU failed: Invalid argument

There is typo issue in function kvm_eiointc_ctrl_access() when set
max supported vCPUs.

Cc: [email-masked]
Fixes: 47256c4c8b1b ("LoongArch: KVM: Avoid copy_*_user() with lock hold in kvm_eiointc_ctrl_access()")

Signed-off-by: Bibo Mao <[email-masked]>
---
 arch/loongarch/kvm/intc/eiointc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/kvm/intc/eiointc.c b/arch/loongarch/kvm/intc/eiointc.c
index c32333695381..a1cc116b4dac 100644
--- a/arch/loongarch/kvm/intc/eiointc.c
+++ b/arch/loongarch/kvm/intc/eiointc.c
@@ -439,7 +439,7 @@ static int kvm_eiointc_ctrl_access(struct kvm_device *dev,
 	spin_lock_irqsave(&s->lock, flags);
 	switch (type) {
 	case KVM_DEV_LOONGARCH_EXTIOI_CTRL_INIT_NUM_CPU:
-		if (val >= EIOINTC_ROUTE_MAX_VCPUS)
+		if (val > EIOINTC_ROUTE_MAX_VCPUS)
 			ret = -EINVAL;
 		else
 			s->num_cpu = val;

base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
-- 
2.39.3

From - Fri Oct 17 14:26:19 2025
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From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= <[email-masked]>
Date: Tue, 14 Oct 2025 12:50:38 +0300 (EEST)
To: Kurt Borja <[email-masked]>
cc: Hans de Goede <[email-masked]>, Armin Wolf <[email-masked]>, 
    [email-masked], [email-masked], 
    LKML <[email-masked]>, [email-masked], 
    Gal Hammer <[email-masked]>
Subject: Re: [PATCH v2] platform/x86: alienware-wmi-wmax: Fix null pointer
 derefence in sleep handlers
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  This message is in MIME format.  The first part should be readable text,
  while the remaining parts are likely unreadable without MIME-aware tools.

--8323328-1269750449-1760435378=:925
Content-Type: text/plain; CHARSET=ISO-8859-15
Content-Transfer-Encoding: QUOTED-PRINTABLE
Content-ID: <[email-masked]>

On Tue, 14 Oct 2025, Kurt Borja wrote:

> On Mon Oct 13, 2025 at 10:10 AM -05, Ilpo J=E4rvinen wrote:
> > On Mon, 13 Oct 2025 00:26:26 -0500, Kurt Borja wrote:
> >
> >> Initialize `awcc` with empty quirks to avoid a null pointer dereferenc=
e
> >> in sleep handlers for devices without the AWCC interface.
> >>=20
> >> This also allows some code simplification in alienware_wmax_wmi_init()=
=2E
> >>=20
> >>=20
> >
> >
> > Thank you for your contribution, it has been applied to my local
> > review-ilpo-fixes branch. Note it will show up in the public
> > platform-drivers-x86/review-ilpo-fixes branch only once I've pushed my
> > local branch there, which might take a while.
> >
> > The list of commits applied:
> > [1/1] platform/x86: alienware-wmi-wmax: Fix null pointer derefence in s=
leep handlers
> >       commit: 5ae9382ac3c56d044ed065d0ba6d8c42139a8f98
> >
> > --
> >  i.
>=20
> Hi Ilpo,
>=20
> Gal has just noticed this approach prevents the old driver interface
> from loading, which is a huge regression.
>=20
> Do you prefer to drop this commit or should I submit a revert?
>=20
> Thank you for your patience!

Okay, thanks for the information. I'll drop it, it's very easy to drop as=
=20
it's the HEAD commit.

--=20
 i.
--8323328-1269750449-1760435378=:925--

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Date: Tue, 14 Oct 2025 11:51:45 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v2 RESEND] media: hackrf: fix to not free memory after the
 device is registered in hackrf_probe()
To: Jeongjun Park <[email-masked]>, [email-masked],
 [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked],
 [email-masked],
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Hi Jeongjun Park,

On 04/09/2025 07:42, Jeongjun Park wrote:
> In hackrf driver, the following race condition occurs:
> ```
> 		CPU0						CPU1
> hackrf_probe()
>   kzalloc(); // alloc hackrf_dev
>   ....
>   v4l2_device_register();
>   ....
> 						open("/path/to/dev"); // open hackrf dev
> 						....
>   v4l2_device_unregister();
>   ....
>   kfree(); // free hackrf_dev
>   ....
> 						ioctl(fd, ...);
> 						  v4l2_ioctl();
> 						    video_is_registered() // UAF!!
> 						....
> 						close(fd);
> 						  v4l2_release() // UAF!!
> 						    hackrf_video_release()
> 						      kfree(); // DFB!!
> ```
> 
> When a V4L2 or video device is unregistered, the device node is removed so
> new open() calls are blocked.
> 
> However, file descriptors that are already open-and any in-flight I/O-do
> not terminate immediately; they remain valid until the last reference is
> dropped and the driver's release() is invoked.
> 
> Therefore, freeing device memory on the error path after hackrf_probe()
> has registered dev it will lead to a race to use-after-free vuln, since
> those already-open handles haven't been released yet.
> 
> And since release() free memory too, race to use-after-free and 
> double-free vuln occur.
> 
> To prevent this, if device is registered from probe(), it should be
> modified to free memory only through release() rather than calling
> kfree() directly.
> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=6ffd76b5405c006a46b7
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=f1b20958f93d2d250727
> Fixes: 8bc4a9ed8504 ("[media] hackrf: add support for transmitter")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
> v2: Fix incorrect patch description style and CC stable mailing list
> - Link to v1: https://lore.kernel.org/all/[email-masked]/
> ---
>  drivers/media/usb/hackrf/hackrf.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c
> index 0b50de8775a3..d7a84422193d 100644
> --- a/drivers/media/usb/hackrf/hackrf.c
> +++ b/drivers/media/usb/hackrf/hackrf.c
> @@ -1515,6 +1515,8 @@ static int hackrf_probe(struct usb_interface *intf,
>  	video_unregister_device(&dev->rx_vdev);
>  err_v4l2_device_unregister:
>  	v4l2_device_unregister(&dev->v4l2_dev);

Instead of v4l2_device_unregister() this should call v4l2_device_put().
Otherwise the memory will never be freed since the v4l2_device refcount
will never reach 0.

> +	dev_dbg(&intf->dev, "failed=%d\n", ret);

Drop this line, it doesn't add anything.

Regards,

	Hans

> +	return ret;
>  err_v4l2_ctrl_handler_free_tx:
>  	v4l2_ctrl_handler_free(&dev->tx_ctrl_handler);
>  err_v4l2_ctrl_handler_free_rx:
> --
> 

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Date: Tue, 14 Oct 2025 10:50:02 +0100
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
To: Sergey Senozhatsky <[email-masked]>,
 "Rafael J. Wysocki" <[email-masked]>,
 Greg Kroah-Hartman <[email-masked]>
Cc: Artem Bityutskiy <[email-masked]>,
 Sasha Levin <[email-masked]>, Daniel Lezcano <[email-masked]>,
 [email-masked], [email-masked],
 Tomasz Figa <[email-masked]>, [email-masked]
From: Christian Loehle <[email-masked]>
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                             [139.178.88.99 listed in list.dnswl.org]
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On 10/14/25 08:43, Sergey Senozhatsky wrote:
> Hello,
> 
> We are observing performance regressions (cpu usage, power
> consumption, dropped frames in video playback test, etc.)
> after updating to recent stable kernels.  We tracked it down
> to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674
> in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information",
> upstream commit 85975daeaa4).
> 
> Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> invalid recent intervals data") doesn't address the problems we are
> observing.  Revert seems to be bringing performance metrics back to
> pre-regression levels.

Any details would be much appreciated.
How do the idle state usages differ with and without
"cpuidle: menu: Avoid discarding useful information"?
What do the idle states look like in your platform?

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From: Kurt Borja <[email-masked]>
Date: Tue, 14 Oct 2025 05:07:27 -0500
Subject: [PATCH v3] platform/x86: alienware-wmi-wmax: Fix null pointer
 dereference in sleep handlers
To: Hans de Goede <[email-masked]>, 
 =?utf-8?q?Ilpo_J=C3=A4rvinen?= <[email-masked]>, 
 Armin Wolf <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], 
 Gal Hammer <[email-masked]>, Kurt Borja <[email-masked]>
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                             [kuurtb[at]gmail.com]
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Devices without the AWCC interface don't initialize `awcc`. Add a check
before dereferencing it in sleep handlers.

Cc: [email-masked]
Reported-by: Gal Hammer <[email-masked]>
Tested-by: Gal Hammer <[email-masked]>
Fixes: 07ac275981b1 ("platform/x86: alienware-wmi-wmax: Add support for manual fan control")
Signed-off-by: Kurt Borja <[email-masked]>
---
Changes in v3:
- Fix typo in title
- Go for a simpler approach because the last one prevented the old
  driver interface from loading
- Link to v2: https://lore.kernel.org/r/[email-masked]

Changes in v2:
- Little logic mistake in the `force_gmode` path... (oops)
- Link to v1: https://lore.kernel.org/r/[email-masked]
---
 drivers/platform/x86/dell/alienware-wmi-wmax.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c
index 31f9643a6a3b..b106e8e407b3 100644
--- a/drivers/platform/x86/dell/alienware-wmi-wmax.c
+++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c
@@ -1639,7 +1639,7 @@ static int wmax_wmi_probe(struct wmi_device *wdev, const void *context)
 
 static int wmax_wmi_suspend(struct device *dev)
 {
-	if (awcc->hwmon)
+	if (awcc && awcc->hwmon)
 		awcc_hwmon_suspend(dev);
 
 	return 0;
@@ -1647,7 +1647,7 @@ static int wmax_wmi_suspend(struct device *dev)
 
 static int wmax_wmi_resume(struct device *dev)
 {
-	if (awcc->hwmon)
+	if (awcc && awcc->hwmon)
 		awcc_hwmon_resume(dev);
 
 	return 0;

---
base-commit: 3ed17349f18774c24505b0c21dfbd3cc4f126518
change-id: 20251012-sleep-fix-5d0596dd92a3

-- 
 ~ Kurt

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Date: Tue, 14 Oct 2025 12:06:52 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v2 RESEND] media: as102: fix to not free memory after the
 device is registered in as102_usb_probe()
To: Jeongjun Park <[email-masked]>, [email-masked],
 [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked]
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On 04/09/2025 07:46, Jeongjun Park wrote:
> In as102_usb driver, the following race condition occurs:
> ```
> 		CPU0						CPU1
> as102_usb_probe()
>   kzalloc(); // alloc as102_dev_t
>   ....
>   usb_register_dev();
> 						open("/path/to/dev"); // open as102 dev
> 						....
>   usb_deregister_dev();
>   ....
>   kfree(); // free as102_dev_t
>   ....
> 						close(fd);
> 						  as102_release() // UAF!!
> 						    as102_usb_release()
> 						      kfree(); // DFB!!
> ```
> 
> When a USB character device registered with usb_register_dev() is later
> unregistered (via usb_deregister_dev() or disconnect), the device node is
> removed so new open() calls fail. However, file descriptors that are
> already open do not go away immediately: they remain valid until the last
> reference is dropped and the driver's .release() is invoked.
> 
> In as102, as102_usb_probe() calls usb_register_dev() and then, on an
> error path, does usb_deregister_dev() and frees as102_dev_t right away.
> If userspace raced a successful open() before the deregistration, that
> open FD will later hit as102_release() --> as102_usb_release() and access
> or free as102_dev_t again, occur a race to use-after-free and
> double-free vuln.
> 
> The fix is to never kfree(as102_dev_t) directly once usb_register_dev()
> has succeeded. After deregistration, defer freeing memory to .release().
> 
> In other words, let release() perform the last kfree when the final open
> FD is closed.
> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=47321e8fd5a4c84088db
> Fixes: cd19f7d3e39b ("[media] as102: fix leaks at failure paths in as102_usb_probe()")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
> v2: Fix incorrect patch description style and CC stable mailing list
> - Link to v1: https://lore.kernel.org/all/[email-masked]/
> ---
>  drivers/media/usb/as102/as102_usb_drv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/media/usb/as102/as102_usb_drv.c b/drivers/media/usb/as102/as102_usb_drv.c
> index e0ef66a522e2..abde5666b2ee 100644
> --- a/drivers/media/usb/as102/as102_usb_drv.c
> +++ b/drivers/media/usb/as102/as102_usb_drv.c
> @@ -404,6 +404,7 @@ static int as102_usb_probe(struct usb_interface *intf,
>  	as102_free_usb_stream_buffer(as102_dev);
>  failed_stream:
>  	usb_deregister_dev(intf, &as102_usb_class_driver);
> +	return ret;

Here too I wonder if the memory is actually freed. I suspect a usb_put_intf()
is needed. I'm not a USB expert, though. But you should check if you didn't
replace a UAF by a memory leak.

Regards,

	Hans

>  failed:
>  	usb_put_dev(as102_dev->bus_adap.usb_dev);
>  	usb_set_intfdata(intf, NULL);
> --
> 

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From: Abel Vesa <[email-masked]>
Date: Tue, 14 Oct 2025 12:46:05 +0300
Subject: [PATCH RESEND v3 3/3] arm64: dts: qcom: Add missing TCSR ref clock
 to the DP PHYs
To: Vinod Koul <[email-masked]>, 
 Kishon Vijay Abraham I <[email-masked]>, Rob Herring <[email-masked]>, 
 Krzysztof Kozlowski <[email-masked]>, 
 Conor Dooley <[email-masked]>, Bjorn Andersson <[email-masked]>, 
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 Sibi Sankar <[email-masked]>, 
 Rajendra Nayak <[email-masked]>
Cc: Krzysztof Kozlowski <[email-masked]>, 
 Neil Armstrong <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], Abel Vesa <[email-masked]>, 
 [email-masked]
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The DP PHYs on X1E80100 need the ref clock which is provided by the
TCSR CC.

The current X Elite devices supported upstream work fine without this
clock, because the boot firmware leaves this clock enabled. But we should
not rely on that. Also, even though this change breaks the ABI, it is
needed in order to make the driver disables this clock along with the
other ones, for a proper bring-down of the entire PHY.

So lets attach it to each of the DP PHYs in order to do that.

Cc: [email-masked] # v6.9
Fixes: 1940c25eaa63 ("arm64: dts: qcom: x1e80100: Add display nodes")
Signed-off-by: Abel Vesa <[email-masked]>
---
 arch/arm64/boot/dts/qcom/x1e80100.dtsi | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
index 51576d9c935decbc61a8e4200de83e739f7da814..0db5183cb4c4ea984d6a47987a1a165cacb3c4e7 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
@@ -5817,9 +5817,11 @@ mdss_dp2_phy: phy@aec2a00 {
 			      <0 0x0aec2000 0 0x1c8>;
 
 			clocks = <&dispcc DISP_CC_MDSS_DPTX2_AUX_CLK>,
-				 <&dispcc DISP_CC_MDSS_AHB_CLK>;
+				 <&dispcc DISP_CC_MDSS_AHB_CLK>,
+				 <&tcsr TCSR_EDP_CLKREF_EN>;
 			clock-names = "aux",
-				      "cfg_ahb";
+				      "cfg_ahb",
+				      "ref";
 
 			power-domains = <&rpmhpd RPMHPD_MX>;
 
@@ -5837,9 +5839,11 @@ mdss_dp3_phy: phy@aec5a00 {
 			      <0 0x0aec5000 0 0x1c8>;
 
 			clocks = <&dispcc DISP_CC_MDSS_DPTX3_AUX_CLK>,
-				 <&dispcc DISP_CC_MDSS_AHB_CLK>;
+				 <&dispcc DISP_CC_MDSS_AHB_CLK>,
+				 <&tcsr TCSR_EDP_CLKREF_EN>;
 			clock-names = "aux",
-				      "cfg_ahb";
+				      "cfg_ahb",
+				      "ref";
 
 			power-domains = <&rpmhpd RPMHPD_MX>;

-- 
2.48.1

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From: Dileep malepu <[email-masked]>
Date: Tue, 14 Oct 2025 15:17:29 +0530
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
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Hiii Greg,

On Mon, Oct 13, 2025 at 9:29=E2=80=AFPM Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.17.3-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
> -------------

Build and boot tested 6.17.3-rc1 using qemu-x86_64. The kernel was
successfully built and booted in a virtualized environment without any
issues.

Build
kernel: 6.17.1-rc1
git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc=
.git
git commit: 99cf54e7bd2fde42d75c71b54fb3652adea2e7a4

Tested-by: Dileep Malepu <[email-masked]>

Best regards
Dileep Malepu.

From - Fri Oct 17 14:26:19 2025
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Date: Tue, 14 Oct 2025 04:48:28 -0500
Subject: Re: [PATCH v2] platform/x86: alienware-wmi-wmax: Fix null pointer
 derefence in sleep handlers
From: "Kurt Borja" <[email-masked]>
To: =?utf-8?q?Ilpo_J=C3=A4rvinen?= <[email-masked]>, "Hans de
 Goede" <[email-masked]>, "Armin Wolf" <[email-masked]>, "Kurt Borja"
 <[email-masked]>
Cc: <[email-masked]>, <[email-masked]>,
 <[email-masked]>, <[email-masked]>, "Gal Hammer"
 <[email-masked]>
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On Mon Oct 13, 2025 at 10:10 AM -05, Ilpo J=C3=A4rvinen wrote:
> On Mon, 13 Oct 2025 00:26:26 -0500, Kurt Borja wrote:
>
>> Initialize `awcc` with empty quirks to avoid a null pointer dereference
>> in sleep handlers for devices without the AWCC interface.
>>=20
>> This also allows some code simplification in alienware_wmax_wmi_init().
>>=20
>>=20
>
>
> Thank you for your contribution, it has been applied to my local
> review-ilpo-fixes branch. Note it will show up in the public
> platform-drivers-x86/review-ilpo-fixes branch only once I've pushed my
> local branch there, which might take a while.
>
> The list of commits applied:
> [1/1] platform/x86: alienware-wmi-wmax: Fix null pointer derefence in sle=
ep handlers
>       commit: 5ae9382ac3c56d044ed065d0ba6d8c42139a8f98
>
> --
>  i.

Hi Ilpo,

Gal has just noticed this approach prevents the old driver interface
from loading, which is a huge regression.

Do you prefer to drop this commit or should I submit a revert?

Thank you for your patience!

--=20
 ~ Kurt

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From: Abel Vesa <[email-masked]>
Date: Tue, 14 Oct 2025 12:46:04 +0300
Subject: [PATCH RESEND v3 2/3] phy: qcom: edp: Make the number of clocks
 flexible
To: Vinod Koul <[email-masked]>, 
 Kishon Vijay Abraham I <[email-masked]>, Rob Herring <[email-masked]>, 
 Krzysztof Kozlowski <[email-masked]>, 
 Conor Dooley <[email-masked]>, Bjorn Andersson <[email-masked]>, 
 Dmitry Baryshkov <[email-masked]>, Konrad Dybcio <[email-masked]>, 
 Sibi Sankar <[email-masked]>, 
 Rajendra Nayak <[email-masked]>
Cc: Krzysztof Kozlowski <[email-masked]>, 
 Neil Armstrong <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], Abel Vesa <[email-masked]>, 
 [email-masked]
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On X Elite, the DP PHY needs another clock called ref, while all other
platforms do not.

The current X Elite devices supported upstream work fine without this
clock, because the boot firmware leaves this clock enabled. But we should
not rely on that. Also, even though this change breaks the ABI, it is
needed in order to make the driver disables this clock along with the
other ones, for a proper bring-down of the entire PHY.

So in order to handle these clocks on different platforms, make the driver
get all the clocks regardless of how many there are provided.

Cc: [email-masked] # v6.10
Fixes: db83c107dc29 ("phy: qcom: edp: Add v6 specific ops and X1E80100 platform support")
Signed-off-by: Abel Vesa <[email-masked]>
---
 drivers/phy/qualcomm/phy-qcom-edp.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
index f1b51018683d51df064f60440864c6031638670c..ca9bb9d70e29e1a132bd499fb9f74b5837acf45b 100644
--- a/drivers/phy/qualcomm/phy-qcom-edp.c
+++ b/drivers/phy/qualcomm/phy-qcom-edp.c
@@ -103,7 +103,9 @@ struct qcom_edp {
 
 	struct phy_configure_opts_dp dp_opts;
 
-	struct clk_bulk_data clks[2];
+	struct clk_bulk_data *clks;
+	int num_clks;
+
 	struct regulator_bulk_data supplies[2];
 
 	bool is_edp;
@@ -218,7 +220,7 @@ static int qcom_edp_phy_init(struct phy *phy)
 	if (ret)
 		return ret;
 
-	ret = clk_bulk_prepare_enable(ARRAY_SIZE(edp->clks), edp->clks);
+	ret = clk_bulk_prepare_enable(edp->num_clks, edp->clks);
 	if (ret)
 		goto out_disable_supplies;
 
@@ -885,7 +887,7 @@ static int qcom_edp_phy_exit(struct phy *phy)
 {
 	struct qcom_edp *edp = phy_get_drvdata(phy);
 
-	clk_bulk_disable_unprepare(ARRAY_SIZE(edp->clks), edp->clks);
+	clk_bulk_disable_unprepare(edp->num_clks, edp->clks);
 	regulator_bulk_disable(ARRAY_SIZE(edp->supplies), edp->supplies);
 
 	return 0;
@@ -1092,11 +1094,9 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
 	if (IS_ERR(edp->pll))
 		return PTR_ERR(edp->pll);
 
-	edp->clks[0].id = "aux";
-	edp->clks[1].id = "cfg_ahb";
-	ret = devm_clk_bulk_get(dev, ARRAY_SIZE(edp->clks), edp->clks);
-	if (ret)
-		return ret;
+	edp->num_clks = devm_clk_bulk_get_all(dev, &edp->clks);
+	if (edp->num_clks < 0)
+		return dev_err_probe(dev, edp->num_clks, "failed to parse clocks\n");
 
 	edp->supplies[0].supply = "vdda-phy";
 	edp->supplies[1].supply = "vdda-pll";

-- 
2.48.1

From - Fri Oct 17 14:26:19 2025
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Date: Tue, 14 Oct 2025 10:48:00 +0200
From: Pavel Machek <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
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--5O6Ajf792dUZmI8L
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Hi!

> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.6.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--5O6Ajf792dUZmI8L
Content-Type: application/pgp-signature; name="signature.asc"

--5O6Ajf792dUZmI8L--

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Date: Tue, 14 Oct 2025 08:51:56 +0000
Subject: [PATCH v2] usb: gadget: udc: fix race condition in usb_del_gadget
From: Jimmy Hu <[email-masked]>
To: [email-masked], [email-masked]
Cc: [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked]
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A race condition during gadget teardown can lead to a use-after-free
in usb_gadget_state_work(), as reported by KASAN:

  BUG: KASAN: invalid-access in sysfs_notify+0_x_2c/0_x_d0
  Workqueue: events usb_gadget_state_work

The fundamental race occurs because a concurrent event (e.g., an
interrupt) can call usb_gadget_set_state() and schedule gadget->work
at any time during the cleanup process in usb_del_gadget().

Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after
device removal") attempted to fix this by moving flush_work() to after
device_del(). However, this does not fully solve the race, as a new
work item can still be scheduled *after* flush_work() completes but
before the gadget's memory is freed, leading to the same use-after-free.

This patch fixes the race condition robustly by introducing a 'teardown'
flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is
set during cleanup in usb_del_gadget() *before* calling flush_work() to
prevent any new work from being scheduled once cleanup has commenced.
The scheduling site, usb_gadget_set_state(), now checks this flag under
the lock before queueing the work, thus safely closing the race window.

Changes in v2:
  - Removed redundant inline comments as suggested by Alan Stern.

Fixes: 5702f75375aa9 ("usb: gadget: udc-core: move sysfs_notify() to a workqueue")
Signed-off-by: Jimmy Hu <[email-masked]>
Cc: [email-masked]
---
 drivers/usb/gadget/udc/core.c | 17 ++++++++++++++++-
 include/linux/usb/gadget.h    |  5 +++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index d709e24c1fd4..66d2428835da 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1123,8 +1123,13 @@ static void usb_gadget_state_work(struct work_struct *work)
 void usb_gadget_set_state(struct usb_gadget *gadget,
 		enum usb_device_state state)
 {
+	unsigned long flags;
+
+	spin_lock_irqsave(&gadget->state_lock, flags);
 	gadget->state = state;
-	schedule_work(&gadget->work);
+	if (!gadget->teardown)
+		schedule_work(&gadget->work);
+	spin_unlock_irqrestore(&gadget->state_lock, flags);
 }
 EXPORT_SYMBOL_GPL(usb_gadget_set_state);
 
@@ -1357,6 +1362,8 @@ static void usb_udc_nop_release(struct device *dev)
 void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
 		void (*release)(struct device *dev))
 {
+	spin_lock_init(&gadget->state_lock);
+	gadget->teardown = false;
 	INIT_WORK(&gadget->work, usb_gadget_state_work);
 	gadget->dev.parent = parent;
 
@@ -1531,6 +1538,7 @@ EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
 void usb_del_gadget(struct usb_gadget *gadget)
 {
 	struct usb_udc *udc = gadget->udc;
+	unsigned long flags;
 
 	if (!udc)
 		return;
@@ -1544,6 +1552,13 @@ void usb_del_gadget(struct usb_gadget *gadget)
 	kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
 	sysfs_remove_link(&udc->dev.kobj, "gadget");
 	device_del(&gadget->dev);
+	/*
+	 * Set the teardown flag before flushing the work to prevent new work
+	 * from being scheduled while we are cleaning up.
+	 */
+	spin_lock_irqsave(&gadget->state_lock, flags);
+	gadget->teardown = true;
+	spin_unlock_irqrestore(&gadget->state_lock, flags);
 	flush_work(&gadget->work);
 	ida_free(&gadget_id_numbers, gadget->id_number);
 	cancel_work_sync(&udc->vbus_work);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 0f28c5512fcb..8b5e593f7966 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -351,6 +351,9 @@ struct usb_gadget_ops {
  *	can handle. The UDC must support this and all slower speeds and lower
  *	number of lanes.
  * @state: the state we are now (attached, suspended, configured, etc)
+ * @state_lock: Spinlock protecting the `state` and `teardown` members.
+ * @teardown: True if the device is undergoing teardown, used to prevent
+ *	new work from being scheduled during cleanup.
  * @name: Identifies the controller hardware type.  Used in diagnostics
  *	and sometimes configuration.
  * @dev: Driver model state for this abstract device.
@@ -426,6 +429,8 @@ struct usb_gadget {
 	enum usb_ssp_rate		max_ssp_rate;
 
 	enum usb_device_state		state;
+	spinlock_t			state_lock;
+	bool				teardown;
 	const char			*name;
 	struct device			dev;
 	unsigned			isoch_delay;
-- 
2.51.0.760.g7b8bcc2412-goog

From - Fri Oct 17 14:26:19 2025
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From: Abel Vesa <[email-masked]>
Date: Tue, 14 Oct 2025 12:46:03 +0300
Subject: [PATCH RESEND v3 1/3] dt-bindings: phy: qcom-edp: Add missing
 clock for X Elite
To: Vinod Koul <[email-masked]>, 
 Kishon Vijay Abraham I <[email-masked]>, Rob Herring <[email-masked]>, 
 Krzysztof Kozlowski <[email-masked]>, 
 Conor Dooley <[email-masked]>, Bjorn Andersson <[email-masked]>, 
 Dmitry Baryshkov <[email-masked]>, Konrad Dybcio <[email-masked]>, 
 Sibi Sankar <[email-masked]>, 
 Rajendra Nayak <[email-masked]>
Cc: Krzysztof Kozlowski <[email-masked]>, 
 Neil Armstrong <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], Abel Vesa <[email-masked]>, 
 [email-masked]
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On X Elite platform, the eDP PHY uses one more clock called ref.

The current X Elite devices supported upstream work fine without this
clock, because the boot firmware leaves this clock enabled. But we should
not rely on that. Also, even though this change breaks the ABI, it is
needed in order to make the driver disables this clock along with the
other ones, for a proper bring-down of the entire PHY.

So attach the this ref clock to the PHY.

Cc: [email-masked] # v6.10
Fixes: 5d5607861350 ("dt-bindings: phy: qcom-edp: Add X1E80100 PHY compatibles")
Reviewed-by: Krzysztof Kozlowski <[email-masked]>
Signed-off-by: Abel Vesa <[email-masked]>
---
 .../devicetree/bindings/phy/qcom,edp-phy.yaml      | 28 +++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
index eb97181cbb9579893b4ee26a39c3559ad87b2fba..bfc4d75f50ff9e31981fe602478f28320545e52b 100644
--- a/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,edp-phy.yaml
@@ -37,12 +37,15 @@ properties:
       - description: PLL register block
 
   clocks:
-    maxItems: 2
+    minItems: 2
+    maxItems: 3
 
   clock-names:
+    minItems: 2
     items:
       - const: aux
       - const: cfg_ahb
+      - const: ref
 
   "#clock-cells":
     const: 1
@@ -64,6 +67,29 @@ required:
   - "#clock-cells"
   - "#phy-cells"
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,x1e80100-dp-phy
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        clock-names:
+          minItems: 3
+          maxItems: 3
+    else:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          minItems: 2
+          maxItems: 2
+
 additionalProperties: false
 
 examples:

-- 
2.48.1

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From: Abel Vesa <[email-masked]>
Subject: [PATCH RESEND v3 0/3] phy: qcom: edp: Add missing ref clock to
 x1e80100
Date: Tue, 14 Oct 2025 12:46:02 +0300
To: Vinod Koul <[email-masked]>, 
 Kishon Vijay Abraham I <[email-masked]>, Rob Herring <[email-masked]>, 
 Krzysztof Kozlowski <[email-masked]>, 
 Conor Dooley <[email-masked]>, Bjorn Andersson <[email-masked]>, 
 Dmitry Baryshkov <[email-masked]>, Konrad Dybcio <[email-masked]>, 
 Sibi Sankar <[email-masked]>, 
 Rajendra Nayak <[email-masked]>
Cc: Krzysztof Kozlowski <[email-masked]>, 
 Neil Armstrong <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], Abel Vesa <[email-masked]>, 
 [email-masked]
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According to documentation, the DP PHY on x1e80100 has another clock
called ref.

The current X Elite devices supported upstream work fine without this
clock, because the boot firmware leaves this clock enabled. But we should
not rely on that. Also, when it comes to power management, this clock
needs to be also disabled on suspend. So even though this change breaks
the ABI, it is needed in order to make we disable this clock on runtime
PM, when that is going to be enabled in the driver.

So rework the driver to allow different number of clocks, fix the
dt-bindings schema and add the clock to the DT node as well.

Signed-off-by: Abel Vesa <[email-masked]>
---
Changes in v3 (resend)
- picked-up Krzysztof's R-b tag for bindings patch

Changes in v3:
- Use dev_err_probe() on clocks parsing failure.
- Explain why the ABI break is necessary.
- Drop the extra 'clk' suffix from the clock name. So ref instead of
  refclk.
- Link to v2: https://lore.kernel.org/r/[email-masked]

Changes in v2:
- Fix schema by adding the minItems, as suggested by Krzysztof.
- Use devm_clk_bulk_get_all, as suggested by Konrad.
- Rephrase the commit messages to reflect the flexible number of clocks.
- Link to v1: https://lore.kernel.org/r/[email-masked]

---
Abel Vesa (3):
      dt-bindings: phy: qcom-edp: Add missing clock for X Elite
      phy: qcom: edp: Make the number of clocks flexible
      arm64: dts: qcom: Add missing TCSR ref clock to the DP PHYs

 .../devicetree/bindings/phy/qcom,edp-phy.yaml      | 28 +++++++++++++++++++++-
 arch/arm64/boot/dts/qcom/x1e80100.dtsi             | 12 ++++++----
 drivers/phy/qualcomm/phy-qcom-edp.c                | 16 ++++++-------
 3 files changed, 43 insertions(+), 13 deletions(-)
---
base-commit: 52ba76324a9d7c39830c850999210a36ef023cde
change-id: 20250730-phy-qcom-edp-add-missing-refclk-5ab82828f8e7

Best regards,
-- 
Abel Vesa <[email-masked]>

From - Fri Oct 17 14:26:19 2025
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From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= <[email-masked]>
Date: Tue, 14 Oct 2025 11:18:49 +0300 (EEST)
To: Markus Elfring <[email-masked]>
cc: Kurt Borja <[email-masked]>, [email-masked], 
    Armin Wolf <[email-masked]>, Hans de Goede <[email-masked]>, 
    [email-masked], [email-masked], 
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Subject: Re: [v2] platform/x86: alienware-wmi-wmax: Fix null pointer derefence
 in sleep handlers
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  This message is in MIME format.  The first part should be readable text,
  while the remaining parts are likely unreadable without MIME-aware tools.

--8323328-1534069840-1760429929=:925
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: QUOTED-PRINTABLE

On Mon, 13 Oct 2025, Markus Elfring wrote:

> =E2=80=A6
> > The list of commits applied:
> > [1/1] platform/x86: alienware-wmi-wmax: Fix null pointer derefence in s=
leep handlers
>=20
>                                                            dereference?
>=20
>=20
> >       commit: 5ae9382ac3c56d044ed065d0ba6d8c42139a8f98
>=20
> How do you think about to avoid a typo in the summary phrase?

Thanks for noticing it. I've corrected it now.

--=20
 i.

--8323328-1534069840-1760429929=:925--

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Date: Tue, 14 Oct 2025 10:13:10 +0200
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Pascal Ernster <[email-masked]>
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[2025-10-13 16:37] Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.3-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.

Kernel 6.17.3-rc1 compiles fine for x86_64 using GCC 15.2.1+r22+gc4e96a094636 and binutils 2.45+r29+g2b2e51a31ec7, and the resulting kernel boots and runs without any discernible issues on various physical machines of mine (Ivy Bridge, Haswell, Kaby Lake, Coffee Lake) and on a Zen 2 VM and a bunch of Kaby Lake VMs.

Tested-by: Pascal Ernster <[email-masked]>

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Date: Tue, 14 Oct 2025 10:37:48 +0200
From: Peter Zijlstra <[email-masked]>
To: George Kennedy <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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	[email-masked], [email-masked], [email-masked],
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	[email-masked], [email-masked]
Subject: Re: [PATCH] [PATCH v3] perf/x86/amd: check event before enable to
 avoid GPF
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On Tue, Oct 08, 2024 at 08:00:53AM -0500, George Kennedy wrote:
> On AMD machines cpuc->events[idx] can become NULL in a subtle race
> condition with NMI->throttle->x86_pmu_stop().
> 
> Check event for NULL in amd_pmu_enable_all() before enable to avoid a GPF.
> This appears to be an AMD only issue.
> 
> Syzkaller reported a GPF in amd_pmu_enable_all.
> 
> INFO: NMI handler (perf_event_nmi_handler) took too long to run: 13.143
>     msecs
> Oops: general protection fault, probably for non-canonical address
>     0xdffffc0000000034: 0000  PREEMPT SMP KASAN NOPTI
> KASAN: null-ptr-deref in range [0x00000000000001a0-0x00000000000001a7]
> CPU: 0 UID: 0 PID: 328415 Comm: repro_36674776 Not tainted 6.12.0-rc1-syzk
> RIP: 0010:x86_pmu_enable_event (arch/x86/events/perf_event.h:1195
>     arch/x86/events/core.c:1430)
> RSP: 0018:ffff888118009d60 EFLAGS: 00010012
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: 0000000000000034 RSI: 0000000000000000 RDI: 00000000000001a0
> RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
> R13: ffff88811802a440 R14: ffff88811802a240 R15: ffff8881132d8601
> FS:  00007f097dfaa700(0000) GS:ffff888118000000(0000) GS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000200001c0 CR3: 0000000103d56000 CR4: 00000000000006f0
> Call Trace:
>  <IRQ>
> amd_pmu_enable_all (arch/x86/events/amd/core.c:760 (discriminator 2))
> x86_pmu_enable (arch/x86/events/core.c:1360)
> event_sched_out (kernel/events/core.c:1191 kernel/events/core.c:1186
>     kernel/events/core.c:2346)
> __perf_remove_from_context (kernel/events/core.c:2435)
> event_function (kernel/events/core.c:259)
> remote_function (kernel/events/core.c:92 (discriminator 1)
>     kernel/events/core.c:72 (discriminator 1))
> __flush_smp_call_function_queue (./arch/x86/include/asm/jump_label.h:27
>     ./include/linux/jump_label.h:207 ./include/trace/events/csd.h:64
>     kernel/smp.c:135 kernel/smp.c:540)
> __sysvec_call_function_single (./arch/x86/include/asm/jump_label.h:27
>     ./include/linux/jump_label.h:207
>     ./arch/x86/include/asm/trace/irq_vectors.h:99 arch/x86/kernel/smp.c:272)
> sysvec_call_function_single (arch/x86/kernel/smp.c:266 (discriminator 47)
>     arch/x86/kernel/smp.c:266 (discriminator 47))
>  </IRQ>
> 
> Reported-by: syzkaller <[email-masked]>
> Signed-off-by: George Kennedy <[email-masked]>
> ---

Without a Fixes tag it goes into perf/core.

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Subject:
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The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     fa4f4bae893fbce8a3edfff1ab7ece0c01dc1328
Gitweb:        https://git.kernel.org/tip/fa4f4bae893fbce8a3edfff1ab7ece0c01d=
c1328
Author:        Adrian Hunter <[email-masked]>
AuthorDate:    Mon, 13 Oct 2025 10:22:44 +03:00
Committer:     Peter Zijlstra <[email-masked]>
CommitterDate: Tue, 14 Oct 2025 10:38:10 +02:00

perf/core: Fix MMAP2 event device with backing files

Some file systems like FUSE-based ones or overlayfs may record the backing
file in struct vm_area_struct vm_file, instead of the user file that the
user mmapped.

That causes perf to misreport the device major/minor numbers of the file
system of the file, and the generation of the file, and potentially other
inode details.  There is an existing helper file_user_inode() for that
situation.

Use file_user_inode() instead of file_inode() to get the inode for MMAP2
events.

Example:

  Setup:

    # cd /root
    # mkdir test ; cd test ; mkdir lower upper work merged
    # cp `which cat` lower
    # mount -t overlay overlay -olowerdir=3Dlower,upperdir=3Dupper,workdir=3D=
work merged
    # perf record -e cycles:u -- /root/test/merged/cat /proc/self/maps
    ...
    55b2c91d0000-55b2c926b000 r-xp 00018000 00:1a 3419                       =
/root/test/merged/cat
    ...
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.004 MB perf.data (5 samples) ]
    #
    # stat /root/test/merged/cat
      File: /root/test/merged/cat
      Size: 1127792         Blocks: 2208       IO Block: 4096   regular file
    Device: 0,26    Inode: 3419        Links: 1
    Access: (0755/-rwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
    Access: 2025-09-08 12:23:59.453309624 +0000
    Modify: 2025-09-08 12:23:59.454309624 +0000
    Change: 2025-09-08 12:23:59.454309624 +0000
     Birth: 2025-09-08 12:23:59.453309624 +0000

  Before:

    Device reported 00:02 differs from stat output and /proc/self/maps

    # perf script --show-mmap-events | grep /root/test/merged/cat
             cat     377 [-01]   243.078558: PERF_RECORD_MMAP2 377/377: [0x55=
b2c91d0000(0x9b000) @ 0x18000 00:02 3419 2068525940]: r-xp /root/test/merged/=
cat

  After:

    Device reported 00:1a is the same as stat output and /proc/self/maps

    # perf script --show-mmap-events | grep /root/test/merged/cat
             cat     362 [-01]   127.755167: PERF_RECORD_MMAP2 362/362: [0x55=
ba6e781000(0x9b000) @ 0x18000 00:1a 3419 0]: r-xp /root/test/merged/cat

With respect to stable kernels, overlayfs mmap function ovl_mmap() was
added in v4.19 but file_user_inode() was not added until v6.8 and never
back-ported to stable kernels.  FMODE_BACKING that it depends on was added
in v6.5.  This issue has gone largely unnoticed, so back-porting before
v6.8 is probably not worth it, so put 6.8 as the stable kernel prerequisite
version, although in practice the next long term kernel is 6.12.

Signed-off-by: Adrian Hunter <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Acked-by: Amir Goldstein <[email-masked]>
Cc: [email-masked] # 6.8
---
 kernel/events/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 7b5c237..177e57c 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9403,7 +9403,7 @@ static void perf_event_mmap_event(struct perf_mmap_even=
t *mmap_event)
 		flags |=3D MAP_HUGETLB;
=20
 	if (file) {
-		struct inode *inode;
+		const struct inode *inode;
 		dev_t dev;
=20
 		buf =3D kmalloc(PATH_MAX, GFP_KERNEL);
@@ -9421,7 +9421,7 @@ static void perf_event_mmap_event(struct perf_mmap_even=
t *mmap_event)
 			name =3D "//toolong";
 			goto cpy_name;
 		}
-		inode =3D file_inode(vma->vm_file);
+		inode =3D file_user_inode(vma->vm_file);
 		dev =3D inode->i_sb->s_dev;
 		ino =3D inode->i_ino;
 		gen =3D inode->i_generation;

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Subject:
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The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     8818f507a9391019a3ec7c57b1a32e4b386e48a5
Gitweb:        https://git.kernel.org/tip/8818f507a9391019a3ec7c57b1a32e4b386=
e48a5
Author:        Adrian Hunter <[email-masked]>
AuthorDate:    Mon, 13 Oct 2025 10:22:43 +03:00
Committer:     Peter Zijlstra <[email-masked]>
CommitterDate: Tue, 14 Oct 2025 10:38:09 +02:00

perf/core: Fix MMAP event path names with backing files

Some file systems like FUSE-based ones or overlayfs may record the backing
file in struct vm_area_struct vm_file, instead of the user file that the
user mmapped.

Since commit def3ae83da02f ("fs: store real path instead of fake path in
backing file f_path"), file_path() no longer returns the user file path
when applied to a backing file.  There is an existing helper
file_user_path() for that situation.

Use file_user_path() instead of file_path() to get the path for MMAP
and MMAP2 events.

Example:

  Setup:

    # cd /root
    # mkdir test ; cd test ; mkdir lower upper work merged
    # cp `which cat` lower
    # mount -t overlay overlay -olowerdir=3Dlower,upperdir=3Dupper,workdir=3D=
work merged
    # perf record -e intel_pt//u -- /root/test/merged/cat /proc/self/maps
    ...
    55b0ba399000-55b0ba434000 r-xp 00018000 00:1a 3419                       =
/root/test/merged/cat
    ...
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.060 MB perf.data ]
    #

  Before:

    File name is wrong (/cat), so decoding fails:

    # perf script --no-itrace --show-mmap-events
             cat     367 [016]   100.491492: PERF_RECORD_MMAP2 367/367: [0x55=
b0ba399000(0x9b000) @ 0x18000 00:02 3419 489959280]: r-xp /cat
    ...
    # perf script --itrace=3De | wc -l
    Warning:
    19 instruction trace errors
    19
    #

  After:

    File name is correct (/root/test/merged/cat), so decoding is ok:

    # perf script --no-itrace --show-mmap-events
                 cat     364 [016]    72.153006: PERF_RECORD_MMAP2 364/364: [=
0x55ce4003d000(0x9b000) @ 0x18000 00:02 3419 3132534314]: r-xp /root/test/mer=
ged/cat
    # perf script --itrace=3De
    # perf script --itrace=3De | wc -l
    0
    #

Fixes: def3ae83da02f ("fs: store real path instead of fake path in backing fi=
le f_path")
Signed-off-by: Adrian Hunter <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Acked-by: Amir Goldstein <[email-masked]>
Cc: [email-masked]
---
 kernel/events/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index cd63ec8..7b5c237 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9416,7 +9416,7 @@ static void perf_event_mmap_event(struct perf_mmap_even=
t *mmap_event)
 		 * need to add enough zero bytes after the string to handle
 		 * the 64bit alignment we do later.
 		 */
-		name =3D file_path(file, buf, PATH_MAX - sizeof(u64));
+		name =3D d_path(file_user_path(file), buf, PATH_MAX - sizeof(u64));
 		if (IS_ERR(name)) {
 			name =3D "//toolong";
 			goto cpy_name;

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Date: Tue, 14 Oct 2025 16:43:43 +0900
From: Sergey Senozhatsky <[email-masked]>
To: "Rafael J. Wysocki" <[email-masked]>, 
	Greg Kroah-Hartman <[email-masked]>
Cc: Artem Bityutskiy <[email-masked]>, 
	Christian Loehle <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], [email-masked], 
	Tomasz Figa <[email-masked]>, Sergey Senozhatsky <[email-masked]>, 
	[email-masked]
Subject: stable: commit "cpuidle: menu: Avoid discarding useful information"
 causes regressions
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Hello,

We are observing performance regressions (cpu usage, power
consumption, dropped frames in video playback test, etc.)
after updating to recent stable kernels.  We tracked it down
to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674
in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information",
upstream commit 85975daeaa4).

Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
invalid recent intervals data") doesn't address the problems we are
observing.  Revert seems to be bringing performance metrics back to
pre-regression levels.

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Date: Tue, 14 Oct 2025 09:47:24 +0200
From: Greg Kroah-Hartman <[email-masked]>
To: Sergey Senozhatsky <[email-masked]>
Cc: "Rafael J. Wysocki" <[email-masked]>,
	Artem Bityutskiy <[email-masked]>,
	Christian Loehle <[email-masked]>,
	Sasha Levin <[email-masked]>,
	Daniel Lezcano <[email-masked]>,
	[email-masked], [email-masked],
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On Tue, Oct 14, 2025 at 04:43:43PM +0900, Sergey Senozhatsky wrote:
> Hello,
> 
> We are observing performance regressions (cpu usage, power
> consumption, dropped frames in video playback test, etc.)
> after updating to recent stable kernels.  We tracked it down
> to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674
> in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information",
> upstream commit 85975daeaa4).
> 
> Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> invalid recent intervals data") doesn't address the problems we are
> observing.  Revert seems to be bringing performance metrics back to
> pre-regression levels.
> 

For some reason that commit was not added to the 6.1 releases, sorry
about that.  Can you submit a working/tested backport so we can queue it
up after the next round of releases in a few days?

thanks,

greg k-h

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Date: Tue, 14 Oct 2025 16:54:45 +0900
From: Sergey Senozhatsky <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>, 
	"Rafael J. Wysocki" <[email-masked]>, Artem Bityutskiy <[email-masked]>, 
	Christian Loehle <[email-masked]>, Sasha Levin <[email-masked]>, 
	Daniel Lezcano <[email-masked]>, [email-masked], [email-masked], 
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On (25/10/14 09:47), Greg Kroah-Hartman wrote:
> On Tue, Oct 14, 2025 at 04:43:43PM +0900, Sergey Senozhatsky wrote:
> > Hello,
> > 
> > We are observing performance regressions (cpu usage, power
> > consumption, dropped frames in video playback test, etc.)
> > after updating to recent stable kernels.  We tracked it down
> > to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674
> > in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information",
> > upstream commit 85975daeaa4).
> > 
> > Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> > invalid recent intervals data") doesn't address the problems we are
> > observing.  Revert seems to be bringing performance metrics back to
> > pre-regression levels.
> > 
> 
> For some reason that commit was not added to the 6.1 releases, sorry
> about that.  Can you submit a working/tested backport so we can queue it
> up after the next round of releases in a few days?

Sorry for the confusion, the commit in question presents both in
stable 6.1 and in 6.6 and appears to be causing regressions on our
tests.  I copy-pasted wrong commit id for 6.1: it should be a9edb700846
for 6.1 (and 3cd2aa93674 for 6.6).

From - Fri Oct 17 14:26:20 2025
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From: Naresh Kamboju <[email-masked]>
Date: Tue, 14 Oct 2025 13:28:34 +0530
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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On Mon, 13 Oct 2025 at 20:50, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.17.3-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.17.3-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: 99cf54e7bd2fde42d75c71b54fb3652adea2e7a4
* git describe: v6.17.2-564-g99cf54e7bd2f
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.17.y/build/v6.17=
.2-564-g99cf54e7bd2f

## Test Regressions (compared to v6.17-43-g8902adbbfd36)

## Metric Regressions (compared to v6.17-43-g8902adbbfd36)

## Test Fixes (compared to v6.17-43-g8902adbbfd36)

## Metric Fixes (compared to v6.17-43-g8902adbbfd36)

## Test result summary
total: 150604, pass: 129081, fail: 4610, skip: 16913, xfail: 0

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 138 passed, 1 failed
* arm64: 57 total, 51 passed, 6 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 24 passed, 1 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-rust
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

From - Fri Oct 17 14:26:20 2025
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Date: Tue, 14 Oct 2025 10:02:41 +0200
From: Greg Kroah-Hartman <[email-masked]>
To: Sergey Senozhatsky <[email-masked]>
Cc: "Rafael J. Wysocki" <[email-masked]>,
	Artem Bityutskiy <[email-masked]>,
	Christian Loehle <[email-masked]>,
	Sasha Levin <[email-masked]>,
	Daniel Lezcano <[email-masked]>,
	[email-masked], [email-masked],
	Tomasz Figa <[email-masked]>, [email-masked]
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions
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On Tue, Oct 14, 2025 at 04:54:45PM +0900, Sergey Senozhatsky wrote:
> On (25/10/14 09:47), Greg Kroah-Hartman wrote:
> > On Tue, Oct 14, 2025 at 04:43:43PM +0900, Sergey Senozhatsky wrote:
> > > Hello,
> > > 
> > > We are observing performance regressions (cpu usage, power
> > > consumption, dropped frames in video playback test, etc.)
> > > after updating to recent stable kernels.  We tracked it down
> > > to commit 3cd2aa93674e in linux-6.1.y and commit 3cd2aa93674
> > > in linux-6.6.y ("cpuidle: menu: Avoid discarding useful information",
> > > upstream commit 85975daeaa4).
> > > 
> > > Upstream fixup fa3fa55de0d ("cpuidle: governors: menu: Avoid using
> > > invalid recent intervals data") doesn't address the problems we are
> > > observing.  Revert seems to be bringing performance metrics back to
> > > pre-regression levels.
> > > 
> > 
> > For some reason that commit was not added to the 6.1 releases, sorry
> > about that.  Can you submit a working/tested backport so we can queue it
> > up after the next round of releases in a few days?
> 
> Sorry for the confusion, the commit in question presents both in
> stable 6.1 and in 6.6 and appears to be causing regressions on our
> tests.  I copy-pasted wrong commit id for 6.1: it should be a9edb700846
> for 6.1 (and 3cd2aa93674 for 6.6).
> 

The point is still the same, commit fa3fa55de0d6 ("cpuidle: governors:
menu: Avoid using invalid recent intervals data"), is not backported to
6.1.y, it is however in the following released kernels:
	5.10.241 5.15.190 6.6.103 6.12.43 6.15.11 6.16.2 6.17
so something got lost in our trees and it needs to be backported.

I need to knock up a "what patches are missing" script again and sweep
the trees to catch these types of things.  It's been a year or so since
I last did that.

thanks,

greg k-h

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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
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Subject: Re: [PATCH 3/6] drm/panic: Fix qr_code, ensure vmargin is positive
Date: Tue, 14 Oct 2025 09:34:50 +0200
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Jocelyn Falempe <[email-masked]> writes:

> Depending on qr_code size and screen size, the vertical margin can
> be negative, that means there is not enough room to draw the qr_code.
>
> So abort early, to avoid a segfault by trying to draw at negative
> coordinates.
>
> Fixes: cb5164ac43d0f ("drm/panic: Add a QR code panic screen")
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
 Thomas Zimmermann <[email-masked]>, David Airlie <[email-masked]>,
 Simona Vetter <[email-masked]>, Jocelyn Falempe <[email-masked]>,
 [email-masked], [email-masked]
Cc: [email-masked]
Subject: Re: [PATCH 4/6] drm/panic: Fix kmsg text drawing rectangle
Date: Tue, 14 Oct 2025 09:35:56 +0200
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Jocelyn Falempe <[email-masked]> writes:

> The rectangle height was larger than the screen size. This has no
> real impact.
>
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
 Thomas Zimmermann <[email-masked]>, David Airlie <[email-masked]>,
 Simona Vetter <[email-masked]>, Jocelyn Falempe <[email-masked]>,
 [email-masked], [email-masked]
Cc: [email-masked]
Subject: Re: [PATCH 5/6] drm/panic: Fix divide by 0 if the screen width <
 font width
Date: Tue, 14 Oct 2025 09:36:27 +0200
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Jocelyn Falempe <[email-masked]> writes:

> In the unlikely case that the screen is tiny, and smaller than the
> font width, it leads to a divide by 0:
>
> draw_line_with_wrap()
> chars_per_row = sb->width / font->width = 0
> line_wrap.len = line->len % chars_per_row;
>
> This will trigger a divide by 0
>
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
 Thomas Zimmermann <[email-masked]>, David Airlie <[email-masked]>,
 Simona Vetter <[email-masked]>, Jocelyn Falempe <[email-masked]>,
 [email-masked], [email-masked]
Cc: [email-masked]
Subject: Re: [PATCH 6/6] drm/panic: Fix 24bit pixel crossing page boundaries
Date: Tue, 14 Oct 2025 09:37:54 +0200
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Jocelyn Falempe <[email-masked]> writes:

> When using page list framebuffer, and using RGB888 format, some
> pixels can cross the page boundaries, and this case was not handled,
> leading to writing 1 or 2 bytes on the next virtual address.
>
> Add a check and a specific function to handle this case.
>
> Fixes: c9ff2808790f0 ("drm/panic: Add support to scanout buffer as array of pages")
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
 Thomas Zimmermann <[email-masked]>, David Airlie <[email-masked]>,
 Simona Vetter <[email-masked]>, Jocelyn Falempe <[email-masked]>,
 [email-masked], [email-masked]
Cc: [email-masked]
Subject: Re: [PATCH 2/6] drm/panic: Fix overlap between qr code and logo
Date: Tue, 14 Oct 2025 09:32:47 +0200
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Jocelyn Falempe <[email-masked]> writes:

> The borders of the qr code was not taken into account to check if it
> overlap with the logo, leading to the logo being partially covered.
>
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

From - Fri Oct 17 14:26:20 2025
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From: Jeongjun Park <[email-masked]>
Date: Tue, 14 Oct 2025 15:04:23 +0900
Subject: Re: [PATCH v3] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
To: Namjae Jeon <[email-masked]>
Cc: =?UTF-8?Q?Pali_Roh=C3=A1r?= <[email-masked]>, 
	Ethan Ferguson <[email-masked]>, Sungjong Seo <[email-masked]>, 
	Yuezhang Mo <[email-masked]>, Al Viro <[email-masked]>, 
	[email-masked], [email-masked], 
	[email-masked], [email-masked]
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Hi Namjae,

Namjae Jeon <[email-masked]> wrote:
>
> On Tue, Oct 14, 2025 at 1:46=E2=80=AFAM Pali Roh=C3=A1r <[email-masked]>=
 wrote:
> >
> > On Monday 13 October 2025 22:47:08 Jeongjun Park wrote:
> > > Since the len argument value passed to exfat_ioctl_set_volume_label()
> > > from exfat_nls_to_utf16() is passed 1 too large, an out-of-bounds rea=
d
> > > occurs when dereferencing p_cstring in exfat_nls_to_ucs2() later.
> > >
> > > And because of the NLS_NAME_OVERLEN macro, another error occurs when
> > > creating a file with a period at the end using utf8 and other iochars=
ets,
> > > so the NLS_NAME_OVERLEN macro should be removed and the len argument =
value
> > > should be passed as FSLABEL_MAX - 1.
> > >
> > > Cc: <[email-masked]>
> > > Reported-by: [email-masked]
> > > Closes: https://syzkaller.appspot.com/bug?extid=3D98cc76a76de46b3714d=
4
> > > Fixes: 370e812b3ec1 ("exfat: add nls operations")
> >
> > Fixes: line is for sure wrong as the affected
> > exfat_ioctl_set_volume_label function is not available in the mentioned
> > commit.
> >
> > I guess it should be commit d01579d590f72d2d91405b708e96f6169f24775a.
> >
> > Now I have looked at that commit and I think I finally understood what
> > was the issue. exfat_nls_to_utf16() function is written in a way that
> > it expects null-term string and its strlen as 3rd argument.
> >
> > This was achieved for all code paths except the new one introduced in
> > that commit. "label" is declared as char label[FSLABEL_MAX]; so the
> > FSLABEL_MAX argument in exfat_nls_to_utf16() is effectively
> > sizeof(label). And here comes the problem, it should have been
> > strlen(label) (or rather strnlen(label, sizeof(label)-1) in case
> > userspace pass non-nul term string).
> >
> > So the change below to FSLABEL_MAX - 1 effectively fix the overflow
> > problem. But not the usage of exfat_nls_to_utf16.
> >
> > API of FS_IOC_SETFSLABEL is defined to always take nul-term string:
> > https://man7.org/linux/man-pages/man2/fs_ioc_setfslabel.2const.html
> >
> > And size of buffer is not the length of nul-term string. We should
> > discard anything after nul-term byte.
> >
> > So in my opinion exfat_ioctl_set_volume_label() should be fixed in a wa=
y
> > it would call exfat_nls_to_utf16() with 3rd argument passed as:
> >
> >   strnlen(label, sizeof(label) - 1)
> >
> > or
> >
> >   strnlen(label, FSLABEL_MAX - 1)
> >
> > Or personally I prefer to store this length into new variable (e.g.
> > label_len) and then passing it to exfat_nls_to_utf16() function.
> > For example:
> >
> >   ret =3D exfat_nls_to_utf16(sb, label, label_len, &uniname, &lossy);
> Right, I agree.
> >
> > Adding Ethan to CC as author of the mentioned commit.
> >
> >
> > And about NLS_NAME_OVERLEN, it is being used by the
> > __exfat_resolve_path() function. So removal of the "setting" of
> > NLS_NAME_OVERLEN bit but still checking if the NLS_NAME_OVERLEN bit is
> > set is quite wrong.
> Right, The use of NLS_NAME_OVERLEN in __exfat_resolve_path() and
> in the header should also be removed.

I'll write a patch that reflects this analysis and send it to you right
away.

However, if do this, NLS_NAME_OVERLEN macro is no longer used anywhere
in exfat, so does that mean should also remove the macro define itself?

Regards,
Jeongjun Park

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From: Namjae Jeon <[email-masked]>
Date: Tue, 14 Oct 2025 15:09:54 +0900
Subject: Re: [PATCH v3] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
To: Jeongjun Park <[email-masked]>
Cc: =?UTF-8?Q?Pali_Roh=C3=A1r?= <[email-masked]>, 
	Ethan Ferguson <[email-masked]>, Sungjong Seo <[email-masked]>, 
	Yuezhang Mo <[email-masked]>, Al Viro <[email-masked]>, 
	[email-masked], [email-masked], 
	[email-masked], [email-masked]
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On Tue, Oct 14, 2025 at 3:04=E2=80=AFPM Jeongjun Park <[email-masked]>=
 wrote:
>
> Hi Namjae,
>
> Namjae Jeon <[email-masked]> wrote:
> >
> > On Tue, Oct 14, 2025 at 1:46=E2=80=AFAM Pali Roh=C3=A1r <[email-masked]=
g> wrote:
> > >
> > > On Monday 13 October 2025 22:47:08 Jeongjun Park wrote:
> > > > Since the len argument value passed to exfat_ioctl_set_volume_label=
()
> > > > from exfat_nls_to_utf16() is passed 1 too large, an out-of-bounds r=
ead
> > > > occurs when dereferencing p_cstring in exfat_nls_to_ucs2() later.
> > > >
> > > > And because of the NLS_NAME_OVERLEN macro, another error occurs whe=
n
> > > > creating a file with a period at the end using utf8 and other iocha=
rsets,
> > > > so the NLS_NAME_OVERLEN macro should be removed and the len argumen=
t value
> > > > should be passed as FSLABEL_MAX - 1.
> > > >
> > > > Cc: <[email-masked]>
> > > > Reported-by: [email-masked]
> > > > Closes: https://syzkaller.appspot.com/bug?extid=3D98cc76a76de46b371=
4d4
> > > > Fixes: 370e812b3ec1 ("exfat: add nls operations")
> > >
> > > Fixes: line is for sure wrong as the affected
> > > exfat_ioctl_set_volume_label function is not available in the mention=
ed
> > > commit.
> > >
> > > I guess it should be commit d01579d590f72d2d91405b708e96f6169f24775a.
> > >
> > > Now I have looked at that commit and I think I finally understood wha=
t
> > > was the issue. exfat_nls_to_utf16() function is written in a way that
> > > it expects null-term string and its strlen as 3rd argument.
> > >
> > > This was achieved for all code paths except the new one introduced in
> > > that commit. "label" is declared as char label[FSLABEL_MAX]; so the
> > > FSLABEL_MAX argument in exfat_nls_to_utf16() is effectively
> > > sizeof(label). And here comes the problem, it should have been
> > > strlen(label) (or rather strnlen(label, sizeof(label)-1) in case
> > > userspace pass non-nul term string).
> > >
> > > So the change below to FSLABEL_MAX - 1 effectively fix the overflow
> > > problem. But not the usage of exfat_nls_to_utf16.
> > >
> > > API of FS_IOC_SETFSLABEL is defined to always take nul-term string:
> > > https://man7.org/linux/man-pages/man2/fs_ioc_setfslabel.2const.html
> > >
> > > And size of buffer is not the length of nul-term string. We should
> > > discard anything after nul-term byte.
> > >
> > > So in my opinion exfat_ioctl_set_volume_label() should be fixed in a =
way
> > > it would call exfat_nls_to_utf16() with 3rd argument passed as:
> > >
> > >   strnlen(label, sizeof(label) - 1)
> > >
> > > or
> > >
> > >   strnlen(label, FSLABEL_MAX - 1)
> > >
> > > Or personally I prefer to store this length into new variable (e.g.
> > > label_len) and then passing it to exfat_nls_to_utf16() function.
> > > For example:
> > >
> > >   ret =3D exfat_nls_to_utf16(sb, label, label_len, &uniname, &lossy);
> > Right, I agree.
> > >
> > > Adding Ethan to CC as author of the mentioned commit.
> > >
> > >
> > > And about NLS_NAME_OVERLEN, it is being used by the
> > > __exfat_resolve_path() function. So removal of the "setting" of
> > > NLS_NAME_OVERLEN bit but still checking if the NLS_NAME_OVERLEN bit i=
s
> > > set is quite wrong.
> > Right, The use of NLS_NAME_OVERLEN in __exfat_resolve_path() and
> > in the header should also be removed.
>
> I'll write a patch that reflects this analysis and send it to you right
> away.
>
> However, if do this, NLS_NAME_OVERLEN macro is no longer used anywhere
> in exfat, so does that mean should also remove the macro define itself?
Yes, So I replied that it should be removed in the header.
Thanks.
>
> Regards,
> Jeongjun Park

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Date: Tue, 14 Oct 2025 09:05:20 +0200
From: Hans Verkuil <[email-masked]>
Subject: Re: [PATCH v4 0/2] media: pci: Fix invalid access to file *
To: Jacopo Mondi <[email-masked]>,
 Andy Walls <[email-masked]>,
 Mauro Carvalho Chehab <[email-masked]>,
 Laurent Pinchart <[email-masked]>
Cc: Dan Carpenter <[email-masked]>, [email-masked],
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Hi Jacopo,

On 19/08/2025 09:07, Jacopo Mondi wrote:
> Since commits
> 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
> 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
> 
> All the ioctl handlers access their private data structures
> from file *
> 
> The ivtv and cx18 drivers call the ioctl handlers from their
> DVB layer without a valid file *, causing invalid memory access.
> 
> The issue has been reported by smatch in
> "[bug report] media: cx18: Access v4l2_fh from file"
> 
> Fix this by providing wrappers for the ioctl handlers to be
> used by the DVB layer that do not require a valid file *.

This series should go to the fixes branch for v6.18, right?
This looks like a pure regression, so I think that makes sense.

BTW, why is there a Link: tag in the cx18 patch? It just links to
the v1 of the patch and that doesn't add meaningful information.
Linus likes Link:, but only if it really adds useful information.

Regards,

	Hans

> 
> Signed-off-by: Jacopo Mondi <[email-masked]>
> ---
> Changes in v4:
> - Slightly adjust commit messages
> - Link to v3: https://lore.kernel.org/r/[email-masked]
> 
> Changes in v3:
> - Change helpers to accept the type they're going to operate on instead
>   of using the open_id wrapper type as suggested by Laurent
> - Link to v2: https://lore.kernel.org/r/[email-masked]
> 
> Changes in v2:
> - Add Cc: [email-masked] per-patch
> 
> ---
> Jacopo Mondi (2):
>       media: cx18: Fix invalid access to file *
>       media: ivtv: Fix invalid access to file *
> 
>  drivers/media/pci/cx18/cx18-driver.c |  9 +++------
>  drivers/media/pci/cx18/cx18-ioctl.c  | 30 +++++++++++++++++++-----------
>  drivers/media/pci/cx18/cx18-ioctl.h  |  8 +++++---
>  drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++-------
>  drivers/media/pci/ivtv/ivtv-ioctl.c  | 22 +++++++++++++++++-----
>  drivers/media/pci/ivtv/ivtv-ioctl.h  |  6 ++++--
>  6 files changed, 52 insertions(+), 34 deletions(-)
> ---
> base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc
> change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde
> 
> Best regards,

From - Fri Oct 17 14:26:20 2025
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From: Javier Martinez Canillas <[email-masked]>
To: Jocelyn Falempe <[email-masked]>, Maarten Lankhorst
 <[email-masked]>, Maxime Ripard <[email-masked]>,
 Thomas Zimmermann <[email-masked]>, David Airlie <[email-masked]>,
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Cc: [email-masked]
Subject: Re: [PATCH 1/6] drm/panic: Fix drawing the logo on a small narrow
 screen
Date: Tue, 14 Oct 2025 09:32:12 +0200
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Jocelyn Falempe <[email-masked]> writes:

Hello Jocelyn,

> If the logo width is bigger than the framebuffer width, and the
> height is big enough to hold the logo and the message, it will draw
> at x coordinate that are higher than the width, and ends up in a
> corrupted image.
>
> Fixes: 4b570ac2eb54 ("drm/rect: Add drm_rect_overlap()")
> Signed-off-by: Jocelyn Falempe <[email-masked]>
> ---

Reviewed-by: Javier Martinez Canillas <[email-masked]>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

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From: SeongJae Park <[email-masked]>
To: Andrew Morton <[email-masked]>
Cc: SeongJae Park <[email-masked]>,
	"# 6 . 16 . x" <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH] mm/damon/core: use damos_commit_quota_goal() for new goal commit
Date: Mon, 13 Oct 2025 17:18:44 -0700
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When a damos_commit_quota_goals() is called for adding new DAMOS quota
goals of DAMOS_QUOTA_USER_INPUT metric, current_value fields of the new
goals should be also set as requested.

However, damos_commit_quota_goals() is not updating the field for the
case, since it is setting only metrics and target values using
damos_new_quota_goal(), and metric-optional union fields using
damos_commit_quota_goal_union().  As a result, users could see the first
current_value parameter that committed online with a new quota goal is
ignored.  Users are assumed to commit the current_value for
DAMOS_QUOTA_USER_INPUT quota goals, since it is being used as a
feedback.  Hence the real impact would be subtle.  That said, this is
obviously not intended behavior.

Fix the issue by using damos_commit_quota_goal() which sets all quota
goal parameters, instead of damos_commit_quota_goal_union(), which sets
only the union fields.

Fixes: 1aef9df0ee90 ("mm/damon/core: commit damos_quota_goal->nid")
Cc: <[email-masked]> # 6.16.x
Signed-off-by: SeongJae Park <[email-masked]>
---
 mm/damon/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 93848b4c6944..e72dc49d501c 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -832,7 +832,7 @@ int damos_commit_quota_goals(struct damos_quota *dst, struct damos_quota *src)
 				src_goal->metric, src_goal->target_value);
 		if (!new_goal)
 			return -ENOMEM;
-		damos_commit_quota_goal_union(new_goal, src_goal);
+		damos_commit_quota_goal(new_goal, src_goal);
 		damos_add_quota_goal(dst, new_goal);
 	}
 	return 0;

base-commit: ccb48f0d949e274d388e66c8f80f7d1ff234ce46
-- 
2.47.3

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Date: Tue, 14 Oct 2025 00:47:39 +0000
Subject: [PATCH net] gve: Check valid ts bit on RX descriptor before hw timestamping
From: Harshitha Ramamurthy <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
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From: Tim Hostetler <[email-masked]>

The device returns a valid bit in the LSB of the low timestamp byte in
the completion descriptor that the driver should check before
setting the SKB's hardware timestamp. If the timestamp is not valid, do not
hardware timestamp the SKB.

Cc: [email-masked]
Fixes: b2c7aeb49056 ("gve: Implement ndo_hwtstamp_get/set for RX timestamping")
Reviewed-by: Joshua Washington <[email-masked]>
Signed-off-by: Tim Hostetler <[email-masked]>
Signed-off-by: Harshitha Ramamurthy <[email-masked]>
---
 drivers/net/ethernet/google/gve/gve.h          |  2 ++
 drivers/net/ethernet/google/gve/gve_desc_dqo.h |  3 ++-
 drivers/net/ethernet/google/gve/gve_rx_dqo.c   | 18 ++++++++++++------
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
index bceaf9b05cb4..4cc6dcbfd367 100644
--- a/drivers/net/ethernet/google/gve/gve.h
+++ b/drivers/net/ethernet/google/gve/gve.h
@@ -100,6 +100,8 @@
  */
 #define GVE_DQO_QPL_ONDEMAND_ALLOC_THRESHOLD 96
 
+#define GVE_DQO_RX_HWTSTAMP_VALID 0x1
+
 /* Each slot in the desc ring has a 1:1 mapping to a slot in the data ring */
 struct gve_rx_desc_queue {
 	struct gve_rx_desc *desc_ring; /* the descriptor ring */
diff --git a/drivers/net/ethernet/google/gve/gve_desc_dqo.h b/drivers/net/ethernet/google/gve/gve_desc_dqo.h
index d17da841b5a0..f7786b03c744 100644
--- a/drivers/net/ethernet/google/gve/gve_desc_dqo.h
+++ b/drivers/net/ethernet/google/gve/gve_desc_dqo.h
@@ -236,7 +236,8 @@ struct gve_rx_compl_desc_dqo {
 
 	u8 status_error1;
 
-	__le16 reserved5;
+	u8 reserved5;
+	u8 ts_sub_nsecs_low;
 	__le16 buf_id; /* Buffer ID which was sent on the buffer queue. */
 
 	union {
diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
index 7380c2b7a2d8..02e25be8a50d 100644
--- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c
+++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
@@ -456,14 +456,20 @@ static void gve_rx_skb_hash(struct sk_buff *skb,
  * Note that this means if the time delta between packet reception and the last
  * clock read is greater than ~2 seconds, this will provide invalid results.
  */
-static void gve_rx_skb_hwtstamp(struct gve_rx_ring *rx, u32 hwts)
+static void gve_rx_skb_hwtstamp(struct gve_rx_ring *rx,
+				const struct gve_rx_compl_desc_dqo *desc)
 {
 	u64 last_read = READ_ONCE(rx->gve->last_sync_nic_counter);
 	struct sk_buff *skb = rx->ctx.skb_head;
-	u32 low = (u32)last_read;
-	s32 diff = hwts - low;
-
-	skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(last_read + diff);
+	u32 ts, low;
+	s32 diff;
+
+	if (desc->ts_sub_nsecs_low & GVE_DQO_RX_HWTSTAMP_VALID) {
+		ts = le32_to_cpu(desc->ts);
+		low = (u32)last_read;
+		diff = ts - low;
+		skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(last_read + diff);
+	}
 }
 
 static void gve_rx_free_skb(struct napi_struct *napi, struct gve_rx_ring *rx)
@@ -919,7 +925,7 @@ static int gve_rx_complete_skb(struct gve_rx_ring *rx, struct napi_struct *napi,
 		gve_rx_skb_csum(rx->ctx.skb_head, desc, ptype);
 
 	if (rx->gve->ts_config.rx_filter == HWTSTAMP_FILTER_ALL)
-		gve_rx_skb_hwtstamp(rx, le32_to_cpu(desc->ts));
+		gve_rx_skb_hwtstamp(rx, desc);
 
 	/* RSC packets must set gso_size otherwise the TCP stack will complain
 	 * that packets are larger than MTU.
-- 
2.51.0.740.g6adb054d12-goog

From - Fri Oct 17 14:26:20 2025
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Subject: Re: [PATCH net v3 0/6] Intel Wired LAN Driver Updates 2025-10-01
 (idpf, ixgbe, ixgbevf)
From: [email-masked]
Date: Tue, 14 Oct 2025 01:10:35 +0000
To: Jacob Keller <[email-masked]>
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Hello:

This series was applied to netdev/net.git (main)
by Jakub Kicinski <[email-masked]>:

On Thu, 09 Oct 2025 17:03:45 -0700 you wrote:
> For idpf:
> Milena fixes a memory leak in the idpf reset logic when the driver resets
> with an outstanding Tx timestamp.
> 
> For ixgbe and ixgbevf:
> Jedrzej fixes an issue with reporting link speed on E610 VFs.
> 
> [...]

Here is the summary with links:
  - [net,v3,1/6] idpf: cleanup remaining SKBs in PTP flows
    https://git.kernel.org/netdev/net/c/a3f8c0a27312
  - [net,v3,2/6] ixgbevf: fix getting link speed data for E610 devices
    (no matching commit)
  - [net,v3,3/6] ixgbe: handle IXGBE_VF_GET_PF_LINK_STATE mailbox operation
    https://git.kernel.org/netdev/net/c/f7f97cbc03a4
  - [net,v3,4/6] ixgbevf: fix mailbox API compatibility by negotiating supported features
    https://git.kernel.org/netdev/net/c/a7075f501bd3
  - [net,v3,5/6] ixgbe: handle IXGBE_VF_FEATURES_NEGOTIATE mbox cmd
    https://git.kernel.org/netdev/net/c/823be089f9c8
  - [net,v3,6/6] ixgbe: fix too early devlink_free() in ixgbe_remove()
    https://git.kernel.org/netdev/net/c/5feef67b646d

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

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Date: Tue, 14 Oct 2025 05:18:51 +0200
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
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From: Peter Schneider <[email-masked]>
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Am 13.10.2025 um 16:37 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

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From: Takeshi Ogasawara <[email-masked]>
Date: Tue, 14 Oct 2025 12:40:08 +0900
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
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Hi Greg

On Tue, Oct 14, 2025 at 12:33=E2=80=AFAM Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.17.3-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

6.17.3-rc1 tested.

Build successfully completed.
Boot successfully completed.
No dmesg regressions.
Video output normal.
Sound output normal.

Lenovo ThinkPad X1 Carbon Gen10(Intel i7-1260P(x86_64) arch linux)

[    0.000000] Linux version 6.17.3-rc1rv-g99cf54e7bd2f
(takeshi@ThinkPadX1Gen10J0764) (gcc (GCC) 15.2.1 20250813, GNU ld (GNU
Binutils) 2.45.0) #1 SMP PREEMPT_DYNAMIC Tue Oct 14 12:16:46 JST 2025

Thanks

Tested-by: Takeshi Ogasawara <[email-masked]>

From - Fri Oct 17 14:26:20 2025
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Date: Mon, 13 Oct 2025 15:13:12 -0700
From: Brian Norris <[email-masked]>
To: Manivannan Sadhasivam <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>,
	Mika Westerberg <[email-masked]>,
	Bjorn Helgaas <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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On Mon, Oct 06, 2025 at 04:13:26PM -0700, Manivannan Sadhasivam wrote:
> On Mon, Oct 06, 2025 at 02:33:33PM -0500, Bjorn Helgaas wrote:
> > On Mon, Oct 06, 2025 at 11:32:38AM -0700, Brian Norris wrote:
> > > Some PCI drivers call pci_set_power_state(..., PCI_D3hot) on their own
> > > when preparing for runtime or system suspend, so by the time they hit
> > > pci_finish_runtime_suspend(), they're in D3hot. Then, pci_target_state()
> > > may still pick a lower state (D3cold).
> > 
> > We might need this change, but maybe this is also an opportunity to
> > remove some of those pci_set_power_state(..., PCI_D3hot) calls from
> > drivers.
> > 
> 
> Agree. The PCI client drivers should have no business in opting for D3Hot in the
> suspend path.

I dunno. There are various reasons a device might want to go to D3Hot
some time before fully suspending the system, and possibly even before
runtime suspend (or they may not support runtime PM at all). For
example, on the first step on my alphabetical trawl through

  git grep -l '\<pci_set_power_state\>' drivers/

I found a driver that supports some power-toggling via debugfs, in
drivers/accel/habanalabs/common/debugfs.c. It would take nontrivial
effort to evaluate every case like that for removal.

BTW, we even have documentation for this:

https://docs.kernel.org/power/pci.html#suspend

"However, in some rare case it is convenient to carry out these operations in
a PCI driver.  Then, pci_save_state(), pci_prepare_to_sleep(), and
pci_set_power_state() should be used to save the device's standard configuration
registers, to prepare it for system wakeup (if necessary), and to put it into a
low-power state, respectively."

So sure, it should be rare (like the docs say), and it's probably
redundant in many cases, but I'm not that interested in shaving various
drivers' yaks right now. I'm just fixing a (small) performance
regression in documented behavior.

> It should be the other way around, they should opt-out if they
> want by calling pci_save_state(), but that is also subject to discussion.

FWIW, that's also documented in the above link.

Brian

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From: Christian Marangi <[email-masked]>
To: Bjorn Helgaas <[email-masked]>,
	[email-masked],
	[email-masked]
Cc: Christian Marangi <[email-masked]>,
	[email-masked],
	=?UTF-8?q?Krzysztof=20Ha=C5=82asa?= <[email-masked]>
Subject: [PATCH] PCI/sysfs: enforce single creation of sysfs entry for pdev
Date: Tue, 14 Oct 2025 00:37:16 +0200
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In some specific scenario it's possible that the
pci_create_resource_files() gets called multiple times and the created
entry actually gets wrongly deleted with extreme case of having a NULL
pointer dereference when the PCI is removed.

This mainly happen due to bad timing where the PCI bus is adding PCI
devices and at the same time the sysfs code is adding the entry causing
double execution of the pci_create_resource_files function and kernel
WARNING.

To be more precise there is a race between the late_initcall of
pci-sysfs with pci_sysfs_init and PCI bus.c pci_bus_add_device that also
call pci_create_sysfs_dev_files.

With correct amount of ""luck"" (or better say bad luck)
pci_create_sysfs_dev_files in bus.c might be called with pci_sysfs_init
is executing the loop.

This has been reported multiple times and on multiple system, like imx6
system, ipq806x systems...

To address this, imlement multiple improvement to the implementation:
1. Add a bool to pci_dev to flag when sysfs entry are created
   (sysfs_init)
2. Implement a simple completion to wait pci_sysfs_init execution.
3. Permit additional call of pci_create_sysfs_dev_files only after
   pci_sysfs_init has finished.

With such logic in place, we address al kind of timing problem with
minimal change to any driver.

A notice worth to mention is that the remove function are not affected
by this as the pci_remove_resource_files have enough check in place to
always work and it's always called by pci_stop_dev.

Cc: [email-masked]
Reported-by: Krzysztof Hałasa <[email-masked]>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=215515
Signed-off-by: Christian Marangi <[email-masked]>
---
 drivers/pci/pci-sysfs.c | 34 +++++++++++++++++++++++++++++-----
 include/linux/pci.h     |  1 +
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 71a36f57ef57..cab3aa27f947 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -14,6 +14,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/completion.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/pci.h>
@@ -37,6 +38,7 @@
 #endif
 
 static int sysfs_initialized;	/* = 0 */
+static DECLARE_COMPLETION(sysfs_init_completion);
 
 /* show configuration fields */
 #define pci_config_attr(field, format_string)				\
@@ -1652,12 +1654,32 @@ static const struct attribute_group pci_dev_resource_resize_group = {
 	.is_visible = resource_resize_is_visible,
 };
 
+static int __pci_create_sysfs_dev_files(struct pci_dev *pdev)
+{
+	int ret;
+
+	ret = pci_create_resource_files(pdev);
+	if (ret)
+		return ret;
+
+	/* on success set sysfs correctly created */
+	pdev->sysfs_init = true;
+	return 0;
+}
+
 int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)
 {
 	if (!sysfs_initialized)
 		return -EACCES;
 
-	return pci_create_resource_files(pdev);
+	/* sysfs entry already created */
+	if (pdev->sysfs_init)
+		return 0;
+
+	/* wait for pci_sysfs_init */
+	wait_for_completion(&sysfs_init_completion);
+
+	return __pci_create_sysfs_dev_files(pdev);
 }
 
 /**
@@ -1678,21 +1700,23 @@ static int __init pci_sysfs_init(void)
 {
 	struct pci_dev *pdev = NULL;
 	struct pci_bus *pbus = NULL;
-	int retval;
+	int retval = 0;
 
 	sysfs_initialized = 1;
 	for_each_pci_dev(pdev) {
-		retval = pci_create_sysfs_dev_files(pdev);
+		retval = __pci_create_sysfs_dev_files(pdev);
 		if (retval) {
 			pci_dev_put(pdev);
-			return retval;
+			goto exit;
 		}
 	}
 
 	while ((pbus = pci_find_next_bus(pbus)))
 		pci_create_legacy_files(pbus);
 
-	return 0;
+exit:
+	complete_all(&sysfs_init_completion);
+	return retval;
 }
 late_initcall(pci_sysfs_init);
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index f3f6d6dee3ae..f417a0528f01 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -480,6 +480,7 @@ struct pci_dev {
 	unsigned int	non_mappable_bars:1;	/* BARs can't be mapped to user-space  */
 	pci_dev_flags_t dev_flags;
 	atomic_t	enable_cnt;	/* pci_enable_device has been called */
+	bool		sysfs_init;	/* sysfs entry has been created */
 
 	spinlock_t	pcie_cap_lock;		/* Protects RMW ops in capability accessors */
 	u32		saved_config_space[16]; /* Config space saved at suspend time */
-- 
2.51.0

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From: Namjae Jeon <[email-masked]>
Date: Tue, 14 Oct 2025 08:29:14 +0900
Subject: Re: [PATCH v3] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
To: =?UTF-8?Q?Pali_Roh=C3=A1r?= <[email-masked]>
Cc: Jeongjun Park <[email-masked]>, Ethan Ferguson <[email-masked]>, 
	Sungjong Seo <[email-masked]>, Yuezhang Mo <[email-masked]>, 
	Al Viro <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
	[email-masked]
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On Tue, Oct 14, 2025 at 1:46=E2=80=AFAM Pali Roh=C3=A1r <[email-masked]> w=
rote:
>
> On Monday 13 October 2025 22:47:08 Jeongjun Park wrote:
> > Since the len argument value passed to exfat_ioctl_set_volume_label()
> > from exfat_nls_to_utf16() is passed 1 too large, an out-of-bounds read
> > occurs when dereferencing p_cstring in exfat_nls_to_ucs2() later.
> >
> > And because of the NLS_NAME_OVERLEN macro, another error occurs when
> > creating a file with a period at the end using utf8 and other iocharset=
s,
> > so the NLS_NAME_OVERLEN macro should be removed and the len argument va=
lue
> > should be passed as FSLABEL_MAX - 1.
> >
> > Cc: <[email-masked]>
> > Reported-by: [email-masked]
> > Closes: https://syzkaller.appspot.com/bug?extid=3D98cc76a76de46b3714d4
> > Fixes: 370e812b3ec1 ("exfat: add nls operations")
>
> Fixes: line is for sure wrong as the affected
> exfat_ioctl_set_volume_label function is not available in the mentioned
> commit.
>
> I guess it should be commit d01579d590f72d2d91405b708e96f6169f24775a.
>
> Now I have looked at that commit and I think I finally understood what
> was the issue. exfat_nls_to_utf16() function is written in a way that
> it expects null-term string and its strlen as 3rd argument.
>
> This was achieved for all code paths except the new one introduced in
> that commit. "label" is declared as char label[FSLABEL_MAX]; so the
> FSLABEL_MAX argument in exfat_nls_to_utf16() is effectively
> sizeof(label). And here comes the problem, it should have been
> strlen(label) (or rather strnlen(label, sizeof(label)-1) in case
> userspace pass non-nul term string).
>
> So the change below to FSLABEL_MAX - 1 effectively fix the overflow
> problem. But not the usage of exfat_nls_to_utf16.
>
> API of FS_IOC_SETFSLABEL is defined to always take nul-term string:
> https://man7.org/linux/man-pages/man2/fs_ioc_setfslabel.2const.html
>
> And size of buffer is not the length of nul-term string. We should
> discard anything after nul-term byte.
>
> So in my opinion exfat_ioctl_set_volume_label() should be fixed in a way
> it would call exfat_nls_to_utf16() with 3rd argument passed as:
>
>   strnlen(label, sizeof(label) - 1)
>
> or
>
>   strnlen(label, FSLABEL_MAX - 1)
>
> Or personally I prefer to store this length into new variable (e.g.
> label_len) and then passing it to exfat_nls_to_utf16() function.
> For example:
>
>   ret =3D exfat_nls_to_utf16(sb, label, label_len, &uniname, &lossy);
Right, I agree.
>
> Adding Ethan to CC as author of the mentioned commit.
>
>
> And about NLS_NAME_OVERLEN, it is being used by the
> __exfat_resolve_path() function. So removal of the "setting" of
> NLS_NAME_OVERLEN bit but still checking if the NLS_NAME_OVERLEN bit is
> set is quite wrong.
Right, The use of NLS_NAME_OVERLEN in __exfat_resolve_path() and
in the header should also be removed.
>
>
> Namjae, could you re-check my analysis? Just to be sure that I have not
> misunderstood something. It is better to do proper analysis than having
> incomplete or incorrect fix.
Yes, I agree with your analysis.
Thanks!
>
> > Signed-off-by: Jeongjun Park <[email-masked]>
> > ---
> >  fs/exfat/file.c | 2 +-
> >  fs/exfat/nls.c  | 3 ---
> >  2 files changed, 1 insertion(+), 4 deletions(-)
> >
> > diff --git a/fs/exfat/file.c b/fs/exfat/file.c
> > index f246cf439588..7ce0fb6f2564 100644
> > --- a/fs/exfat/file.c
> > +++ b/fs/exfat/file.c
> > @@ -521,7 +521,7 @@ static int exfat_ioctl_set_volume_label(struct supe=
r_block *sb,
> >
> >       memset(&uniname, 0, sizeof(uniname));
> >       if (label[0]) {
> > -             ret =3D exfat_nls_to_utf16(sb, label, FSLABEL_MAX,
> > +             ret =3D exfat_nls_to_utf16(sb, label, FSLABEL_MAX - 1,
> >                                        &uniname, &lossy);
> >               if (ret < 0)
> >                       return ret;
> > diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
> > index 8243d94ceaf4..57db08a5271c 100644
> > --- a/fs/exfat/nls.c
> > +++ b/fs/exfat/nls.c
> > @@ -616,9 +616,6 @@ static int exfat_nls_to_ucs2(struct super_block *sb=
,
> >               unilen++;
> >       }
> >
> > -     if (p_cstring[i] !=3D '\0')
> > -             lossy |=3D NLS_NAME_OVERLEN;
> > -
> >       *uniname =3D '\0';
> >       p_uniname->name_len =3D unilen;
> >       p_uniname->name_hash =3D exfat_calc_chksum16(upname, unilen << 1,=
 0,
> > --

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Date: Tue, 14 Oct 2025 01:49:18 +0200
Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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From: Peter Schneider <[email-masked]>
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Am 13.10.2025 um 16:43 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

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	[email-masked],
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Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
Date: Mon, 13 Oct 2025 17:06:27 +0000
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# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.6.112-rc1-g07c1c4215e92 #108 SMP PREEMPT_DYNAMIC Mon Oct 13 16:51:13 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

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Date: Mon, 13 Oct 2025 10:09:35 -0700
Subject: Re: [PATCH 6.17 000/563] 6.17.3-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked]
From: Florian Fainelli <[email-masked]>
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On 10/13/25 07:37, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.3 release.
> There are 563 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.3-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels, build tested on 
BMIPS_GENERIC:

Tested-by: Florian Fainelli <[email-masked]>
-- 
Florian

From - Fri Oct 17 14:26:20 2025
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From: Badhri Jagan Sridharan <[email-masked]>
Date: Mon, 13 Oct 2025 10:24:57 -0700
Subject: Re: [PATCH v2] tcpm: switch check for role_sw device with fw_node
To: Michael Grzeschik <[email-masked]>
Cc: Heikki Krogerus <[email-masked]>, 
	Greg Kroah-Hartman <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
	[email-masked]
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On Mon, Oct 13, 2025 at 2:43=E2=80=AFAM Michael Grzeschik
<[email-masked]> wrote:
>
> When there is no port entry in the tcpci entry itself, the driver will
> trigger an error message "OF: graph: no port node found in /...../typec" =
.
>
> It is documented that the dts node should contain an connector entry
> with ports and several port pointing to devices with usb-role-switch
> property set. Only when those connector entry is missing, it should
> check for port entries in the main node.
>
> We switch the search order for looking after ports, which will avoid the
> failure message while there are explicit connector entries.
>
> Fixes: d56de8c9a17d ("usb: typec: tcpm: try to get role switch from tcpc =
fwnode")
> Cc: [email-masked]
> Signed-off-by: Michael Grzeschik <[email-masked]>

Reviewed-by: Badhri Jagan Sridharan <[email-masked]>

> ---
> Changes in v2:
> - fixed typos in the description
> - added fixes tag
> - added Cc: [email-masked]
> - Link to v1: https://lore.kernel.org/r/20251003-b4-ml-topic-tcpm-v1-1-3c=
[email-masked]
> ---
>  drivers/usb/typec/tcpm/tcpm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.=
c
> index b2a568a5bc9b0ba5c50b7031d8e21ee09cefa349..cc78770509dbc6460d75816f5=
44173d6ab4ef873 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -7876,9 +7876,9 @@ struct tcpm_port *tcpm_register_port(struct device =
*dev, struct tcpc_dev *tcpc)
>
>         port->partner_desc.identity =3D &port->partner_ident;
>
> -       port->role_sw =3D usb_role_switch_get(port->dev);
> +       port->role_sw =3D fwnode_usb_role_switch_get(tcpc->fwnode);
>         if (!port->role_sw)
> -               port->role_sw =3D fwnode_usb_role_switch_get(tcpc->fwnode=
);
> +               port->role_sw =3D usb_role_switch_get(port->dev);
>         if (IS_ERR(port->role_sw)) {
>                 err =3D PTR_ERR(port->role_sw);
>                 goto out_destroy_wq;
>
> ---
> base-commit: e406d57be7bd2a4e73ea512c1ae36a40a44e499e
> change-id: 20251003-b4-ml-topic-tcpm-27146727d76a
>
> Best regards,
> --
> Michael Grzeschik <[email-masked]>
>

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Date: Mon, 13 Oct 2025 19:35:40 +0200
Subject: Re: [PATCH] leds: leds-lp50xx: allow LED 0 to be added to module bank
To: Christian Hitz <[email-masked]>
Cc: Lee Jones <[email-masked]>, Pavel Machek <[email-masked]>,
 Christian Hitz <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
From: Jacek Anaszewski <[email-masked]>
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On 10/13/25 10:54, Christian Hitz wrote:
> On Sat, 11 Oct 2025 14:16:16 +0200 Jacek Anaszewski <[email-masked]> wrote:
> 
>> Hi Christian,
>>
>> On 10/8/25 14:32, Christian Hitz wrote:
>>> From: Christian Hitz <[email-masked]>
>>>
>>> led_banks contains LED module number(s) that should be grouped into the
>>> module bank. led_banks is 0-initialized.
>>> By checking the led_banks entries for 0, un-set entries are detected.
>>> But a 0-entry also indicates that LED module 0 should be grouped into the
>>> module bank.
>>>
>>> By only iterating over the available entries no check for unused entries
>>> is required and LED module 0 can be added to bank.
>>>
>>> Signed-off-by: Christian Hitz <[email-masked]>
>>> Cc: [email-masked]
>>> ---
>>>    drivers/leds/leds-lp50xx.c | 10 ++++------
>>>    1 file changed, 4 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
>>> index 94f8ef6b482c..d50c7f3e8f99 100644
>>> --- a/drivers/leds/leds-lp50xx.c
>>> +++ b/drivers/leds/leds-lp50xx.c
>>> @@ -341,17 +341,15 @@ static int lp50xx_brightness_set(struct led_classdev *cdev,
>>>    	return ret;
>>>    }
>>>    
>>> -static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
>>> +static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[], int num_leds)
>>>    {
>>>    	u8 led_config_lo, led_config_hi;
>>>    	u32 bank_enable_mask = 0;
>>>    	int ret;
>>>    	int i;
>>>    
>>> -	for (i = 0; i < priv->chip_info->max_modules; i++) {
>>> -		if (led_banks[i])
>>> -			bank_enable_mask |= (1 << led_banks[i]);
>>> -	}
>>> +	for (i = 0; i < num_leds; i++)
>>> +		bank_enable_mask |= (1 << led_banks[i]);
>>
>> Probably the first idea was to have a bitmask indicating which bank
>> to enable, but it ended up in having array of bank ids in DT with no
>> related adjustment in the driver.
>>
>> This patch deserves Fixes tag.
> 
> This code has not changed since the inital introduction of this driver.

Yeah, I had on mind design approach changes between subsequent
versions of the patch that was adding the driver.

> Fixes: 242b81170fb8 ("leds: lp50xx: Add the LP50XX family of the RGB LED driver")
-- 
Best regards,
Jacek Anaszewski

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Date: Mon, 13 Oct 2025 21:27:26 +0200
To: =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= <[email-masked]>,
 Kurt Borja <[email-masked]>, [email-masked],
 Armin Wolf <[email-masked]>, Hans de Goede <[email-masked]>
Cc: [email-masked], [email-masked],
 LKML <[email-masked]>, Gal Hammer <[email-masked]>
Subject: Re: [v2] platform/x86: alienware-wmi-wmax: Fix null pointer derefence
 in sleep handlers
From: Markus Elfring <[email-masked]>
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=E2=80=A6
> The list of commits applied:
> [1/1] platform/x86: alienware-wmi-wmax: Fix null pointer derefence in sl=
eep handlers

                                                           dereference?

>       commit: 5ae9382ac3c56d044ed065d0ba6d8c42139a8f98

How do you think about to avoid a typo in the summary phrase?

Regards,
Markus

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Date: Mon, 13 Oct 2025 09:47:08 -0700
Subject: Re: [PATCH 6.6 000/196] 6.6.112-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
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From: Florian Fainelli <[email-masked]>
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On 10/13/25 07:43, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.112 release.
> There are 196 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Oct 2025 14:42:41 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.112-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels, build tested on 
BMIPS_GENERIC:

Tested-by: Florian Fainelli <[email-masked]>
-- 
Florian

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Date: Mon, 13 Oct 2025 18:46:25 +0200
From: Pali =?utf-8?B?Um9ow6Fy?= <[email-masked]>
To: Jeongjun Park <[email-masked]>
Cc: Ethan Ferguson <[email-masked]>,
	Namjae Jeon <[email-masked]>,
	Sungjong Seo <[email-masked]>,
	Yuezhang Mo <[email-masked]>,
	Al Viro <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH v3] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
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On Monday 13 October 2025 22:47:08 Jeongjun Park wrote:
> Since the len argument value passed to exfat_ioctl_set_volume_label()
> from exfat_nls_to_utf16() is passed 1 too large, an out-of-bounds read
> occurs when dereferencing p_cstring in exfat_nls_to_ucs2() later.
> 
> And because of the NLS_NAME_OVERLEN macro, another error occurs when
> creating a file with a period at the end using utf8 and other iocharsets,
> so the NLS_NAME_OVERLEN macro should be removed and the len argument value
> should be passed as FSLABEL_MAX - 1.
> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=98cc76a76de46b3714d4
> Fixes: 370e812b3ec1 ("exfat: add nls operations")

Fixes: line is for sure wrong as the affected
exfat_ioctl_set_volume_label function is not available in the mentioned
commit.

I guess it should be commit d01579d590f72d2d91405b708e96f6169f24775a.

Now I have looked at that commit and I think I finally understood what
was the issue. exfat_nls_to_utf16() function is written in a way that
it expects null-term string and its strlen as 3rd argument.

This was achieved for all code paths except the new one introduced in
that commit. "label" is declared as char label[FSLABEL_MAX]; so the
FSLABEL_MAX argument in exfat_nls_to_utf16() is effectively
sizeof(label). And here comes the problem, it should have been
strlen(label) (or rather strnlen(label, sizeof(label)-1) in case
userspace pass non-nul term string).

So the change below to FSLABEL_MAX - 1 effectively fix the overflow
problem. But not the usage of exfat_nls_to_utf16.

API of FS_IOC_SETFSLABEL is defined to always take nul-term string:
https://man7.org/linux/man-pages/man2/fs_ioc_setfslabel.2const.html

And size of buffer is not the length of nul-term string. We should
discard anything after nul-term byte.

So in my opinion exfat_ioctl_set_volume_label() should be fixed in a way
it would call exfat_nls_to_utf16() with 3rd argument passed as:

  strnlen(label, sizeof(label) - 1)

or

  strnlen(label, FSLABEL_MAX - 1)

Or personally I prefer to store this length into new variable (e.g.
label_len) and then passing it to exfat_nls_to_utf16() function.
For example:

  ret = exfat_nls_to_utf16(sb, label, label_len, &uniname, &lossy);

Adding Ethan to CC as author of the mentioned commit.

And about NLS_NAME_OVERLEN, it is being used by the
__exfat_resolve_path() function. So removal of the "setting" of
NLS_NAME_OVERLEN bit but still checking if the NLS_NAME_OVERLEN bit is
set is quite wrong.

Namjae, could you re-check my analysis? Just to be sure that I have not
misunderstood something. It is better to do proper analysis than having
incomplete or incorrect fix.

> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
>  fs/exfat/file.c | 2 +-
>  fs/exfat/nls.c  | 3 ---
>  2 files changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/fs/exfat/file.c b/fs/exfat/file.c
> index f246cf439588..7ce0fb6f2564 100644
> --- a/fs/exfat/file.c
> +++ b/fs/exfat/file.c
> @@ -521,7 +521,7 @@ static int exfat_ioctl_set_volume_label(struct super_block *sb,
>  
>  	memset(&uniname, 0, sizeof(uniname));
>  	if (label[0]) {
> -		ret = exfat_nls_to_utf16(sb, label, FSLABEL_MAX,
> +		ret = exfat_nls_to_utf16(sb, label, FSLABEL_MAX - 1,
>  					 &uniname, &lossy);
>  		if (ret < 0)
>  			return ret;
> diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
> index 8243d94ceaf4..57db08a5271c 100644
> --- a/fs/exfat/nls.c
> +++ b/fs/exfat/nls.c
> @@ -616,9 +616,6 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
>  		unilen++;
>  	}
>  
> -	if (p_cstring[i] != '\0')
> -		lossy |= NLS_NAME_OVERLEN;
> -
>  	*uniname = '\0';
>  	p_uniname->name_len = unilen;
>  	p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0,
> --

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From: Rong Zhang <[email-masked]>
To: Harry Wentland <[email-masked]>,
	Leo Li <[email-masked]>,
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Subject: [PATCH] drm/amd/display: Fix NULL deref in debugfs odm_combine_segments
Date: Tue, 14 Oct 2025 00:47:35 +0800
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When a connector is connected but inactive (e.g., disabled by desktop
environments), pipe_ctx->stream_res.tg will be destroyed. Then, reading
odm_combine_segments causes kernel NULL pointer dereference.

 BUG: kernel NULL pointer dereference, address: 0000000000000000
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: Oops: 0000 [#1] SMP NOPTI
 CPU: 16 UID: 0 PID: 26474 Comm: cat Not tainted 6.17.0+ #2 PREEMPT(lazy)  e6a17af9ee6db7c63e9d90dbe5b28ccab67520c6
 Hardware name: LENOVO 21Q4/LNVNB161216, BIOS PXCN25WW 03/27/2025
 RIP: 0010:odm_combine_segments_show+0x93/0xf0 [amdgpu]
 Code: 41 83 b8 b0 00 00 00 01 75 6e 48 98 ba a1 ff ff ff 48 c1 e0 0c 48 8d 8c 07 d8 02 00 00 48 85 c9 74 2d 48 8b bc 07 f0 08 00 00 <48> 8b 07 48 8b 80 08 02 00>
 RSP: 0018:ffffd1bf4b953c58 EFLAGS: 00010286
 RAX: 0000000000005000 RBX: ffff8e35976b02d0 RCX: ffff8e3aeed052d8
 RDX: 00000000ffffffa1 RSI: ffff8e35a3120800 RDI: 0000000000000000
 RBP: 0000000000000000 R08: ffff8e3580eb0000 R09: ffff8e35976b02d0
 R10: ffffd1bf4b953c78 R11: 0000000000000000 R12: ffffd1bf4b953d08
 R13: 0000000000040000 R14: 0000000000000001 R15: 0000000000000001
 FS:  00007f44d3f9f740(0000) GS:ffff8e3caa47f000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 00000006485c2000 CR4: 0000000000f50ef0
 PKRU: 55555554
 Call Trace:
  <TASK>
  seq_read_iter+0x125/0x490
  ? __alloc_frozen_pages_noprof+0x18f/0x350
  seq_read+0x12c/0x170
  full_proxy_read+0x51/0x80
  vfs_read+0xbc/0x390
  ? __handle_mm_fault+0xa46/0xef0
  ? do_syscall_64+0x71/0x900
  ksys_read+0x73/0xf0
  do_syscall_64+0x71/0x900
  ? count_memcg_events+0xc2/0x190
  ? handle_mm_fault+0x1d7/0x2d0
  ? do_user_addr_fault+0x21a/0x690
  ? exc_page_fault+0x7e/0x1a0
  entry_SYSCALL_64_after_hwframe+0x6c/0x74
 RIP: 0033:0x7f44d4031687
 Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00>
 RSP: 002b:00007ffdb4b5f0b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
 RAX: ffffffffffffffda RBX: 00007f44d3f9f740 RCX: 00007f44d4031687
 RDX: 0000000000040000 RSI: 00007f44d3f5e000 RDI: 0000000000000003
 RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000000 R11: 0000000000000202 R12: 00007f44d3f5e000
 R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000040000
  </TASK>
 Modules linked in: tls tcp_diag inet_diag xt_mark ccm snd_hrtimer snd_seq_dummy snd_seq_midi snd_seq_oss snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device x>
  snd_hda_codec_atihdmi snd_hda_codec_realtek_lib lenovo_wmi_helpers think_lmi snd_hda_codec_generic snd_hda_codec_hdmi snd_soc_core kvm snd_compress uvcvideo sn>
  platform_profile joydev amd_pmc mousedev mac_hid sch_fq_codel uinput i2c_dev parport_pc ppdev lp parport nvme_fabrics loop nfnetlink ip_tables x_tables dm_cryp>
 CR2: 0000000000000000
 ---[ end trace 0000000000000000 ]---
 RIP: 0010:odm_combine_segments_show+0x93/0xf0 [amdgpu]
 Code: 41 83 b8 b0 00 00 00 01 75 6e 48 98 ba a1 ff ff ff 48 c1 e0 0c 48 8d 8c 07 d8 02 00 00 48 85 c9 74 2d 48 8b bc 07 f0 08 00 00 <48> 8b 07 48 8b 80 08 02 00>
 RSP: 0018:ffffd1bf4b953c58 EFLAGS: 00010286
 RAX: 0000000000005000 RBX: ffff8e35976b02d0 RCX: ffff8e3aeed052d8
 RDX: 00000000ffffffa1 RSI: ffff8e35a3120800 RDI: 0000000000000000
 RBP: 0000000000000000 R08: ffff8e3580eb0000 R09: ffff8e35976b02d0
 R10: ffffd1bf4b953c78 R11: 0000000000000000 R12: ffffd1bf4b953d08
 R13: 0000000000040000 R14: 0000000000000001 R15: 0000000000000001
 FS:  00007f44d3f9f740(0000) GS:ffff8e3caa47f000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 00000006485c2000 CR4: 0000000000f50ef0
 PKRU: 55555554

Fix this by checking pipe_ctx->stream_res.tg before dereferencing.

Fixes: 07926ba8a44f ("drm/amd/display: Add debugfs interface for ODM combine info")
Cc: [email-masked]
Signed-off-by: Rong Zhang <[email-masked]>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index f263e1a4537e1..00dac862b665a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -1302,7 +1302,8 @@ static int odm_combine_segments_show(struct seq_file *m, void *unused)
 	if (connector->status != connector_status_connected)
 		return -ENODEV;
 
-	if (pipe_ctx != NULL && pipe_ctx->stream_res.tg->funcs->get_odm_combine_segments)
+	if (pipe_ctx && pipe_ctx->stream_res.tg &&
+	    pipe_ctx->stream_res.tg->funcs->get_odm_combine_segments)
 		pipe_ctx->stream_res.tg->funcs->get_odm_combine_segments(pipe_ctx->stream_res.tg, &segments);
 
 	seq_printf(m, "%d\n", segments);

base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
-- 
2.51.0

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Date: Mon, 13 Oct 2025 13:05:36 -0400
From: Steven Rostedt <[email-masked]>
To: "Masami Hiramatsu (Google)" <[email-masked]>
Cc: Steven Rostedt <[email-masked]>, [email-masked],
 [email-masked], Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>, Andrew Morton
 <[email-masked]>, [email-masked],
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Subject: Re: [PATCH 2/2] tracing: Stop fortify-string from warning in
 tracing_mark_raw_write()
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On Sun, 12 Oct 2025 12:34:08 +0900
Masami Hiramatsu (Google) <[email-masked]> wrote:

> > Use a void pointer and get the offset via offsetof() to keep fortify
> > string from warning about this copy.
> > 
> > Cc: [email-masked]
> > Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
> > Reported-by: [email-masked]
> > Closes: https://lore.kernel.org/all/[email-masked]/
> > Signed-off-by: Steven Rostedt (Google) <[email-masked]>  
> 
> Ah, fixed already.
> 
> Acked-by: Masami Hiramatsu (Google) <[email-masked]>

Actually this was the wrong fix. Before submitting a pull request, I looked
to see if there was a better way to handle this and discovered "unsafe_memcpy()"
which is the proper solution:

  https://lore.kernel.org/all/[email-masked]/

-- Steve

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# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.17.3-rc1-g99cf54e7bd2f #106 SMP PREEMPT_DYNAMIC Mon Oct 13 16:44:03 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

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Subject: [PATCH v2] nvmem: layouts: fix nvmem_layout_bus_uevent
Date: Mon, 13 Oct 2025 20:41:29 +0800
Feedback-ID: esmtpsz:uniontech.com:qybglogicsvrgz:qybglogicsvrgz5a-0
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correctly check the ENODEV return value.

Fixes: 810b790033cc ("nvmem: layouts: fix automatic module loading")
CC: [email-masked]
Co-developed-by: WangYuli <[email-masked]>
Signed-off-by: WangYuli <[email-masked]>
Signed-off-by: Wentao Guan <[email-masked]>
---
v2 changelog:
add cc stable.
---
Signed-off-by: Wentao Guan <[email-masked]>
---
 drivers/nvmem/layouts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/layouts.c b/drivers/nvmem/layouts.c
index f381ce1e84bd..7ebe53249035 100644
--- a/drivers/nvmem/layouts.c
+++ b/drivers/nvmem/layouts.c
@@ -51,7 +51,7 @@ static int nvmem_layout_bus_uevent(const struct device *dev,
 	int ret;
 
 	ret = of_device_uevent_modalias(dev, env);
-	if (ret != ENODEV)
+	if (ret != -ENODEV)
 		return ret;
 
 	return 0;
-- 
2.20.1

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Date: Mon, 13 Oct 2025 09:30:25 -0400
From: Alan Stern <[email-masked]>
To: Jimmy Hu <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH] usb: gadget: udc: fix race condition in usb_del_gadget
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On Mon, Oct 13, 2025 at 07:57:56AM +0000, Jimmy Hu wrote:
> A race condition during gadget teardown can lead to a use-after-free
> in usb_gadget_state_work(), as reported by KASAN:
> 
>   BUG: KASAN: invalid-access in sysfs_notify+0_x_2c/0_x_d0
>   Workqueue: events usb_gadget_state_work
> 
> The fundamental race occurs because a concurrent event (e.g., an
> interrupt) can call usb_gadget_set_state() and schedule gadget->work
> at any time during the cleanup process in usb_del_gadget().
> 
> Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after
> device removal") attempted to fix this by moving flush_work() to after
> device_del(). However, this does not fully solve the race, as a new
> work item can still be scheduled *after* flush_work() completes but
> before the gadget's memory is freed, leading to the same use-after-free.
> 
> This patch fixes the race condition robustly by introducing a 'teardown'
> flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is
> set during cleanup in usb_del_gadget() *before* calling flush_work() to
> prevent any new work from being scheduled once cleanup has commenced.
> The scheduling site, usb_gadget_set_state(), now checks this flag under
> the lock before queueing the work, thus safely closing the race window.

Good analysis.

> 
> Fixes: 5702f75375aa9 ("usb: gadget: udc-core: move sysfs_notify() to a workqueue")
> Signed-off-by: Jimmy Hu <[email-masked]>
> Cc: [email-masked]
> ---
>  drivers/usb/gadget/udc/core.c | 18 +++++++++++++++++-
>  include/linux/usb/gadget.h    |  6 ++++++
>  2 files changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index d709e24c1fd4..c4268b76d747 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c

> @@ -1357,6 +1362,9 @@ static void usb_udc_nop_release(struct device *dev)
>  void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
>  		void (*release)(struct device *dev))
>  {
> +	/* For race-free teardown */
> +	spin_lock_init(&gadget->state_lock);
> +	gadget->teardown = false;
>  	INIT_WORK(&gadget->work, usb_gadget_state_work);
>  	gadget->dev.parent = parent;

> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> index 0f28c5512fcb..8302aeaea82e 100644
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h

> @@ -426,6 +429,9 @@ struct usb_gadget {
>  	enum usb_ssp_rate		max_ssp_rate;
>  
>  	enum usb_device_state		state;
> +	/* For race-free teardown and state management */

The comments here and above merely repeat information that's already 
given in the kerneldoc.  They aren't needed.

Alan Stern

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	[email-masked],
	[email-masked],
	[email-masked],
	Jeongjun Park <[email-masked]>
Subject: [PATCH v3] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
Date: Mon, 13 Oct 2025 22:47:08 +0900
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Since the len argument value passed to exfat_ioctl_set_volume_label()
from exfat_nls_to_utf16() is passed 1 too large, an out-of-bounds read
occurs when dereferencing p_cstring in exfat_nls_to_ucs2() later.

And because of the NLS_NAME_OVERLEN macro, another error occurs when
creating a file with a period at the end using utf8 and other iocharsets,
so the NLS_NAME_OVERLEN macro should be removed and the len argument value
should be passed as FSLABEL_MAX - 1.

Cc: <[email-masked]>
Reported-by: [email-masked]
Closes: https://syzkaller.appspot.com/bug?extid=98cc76a76de46b3714d4
Fixes: 370e812b3ec1 ("exfat: add nls operations")
Signed-off-by: Jeongjun Park <[email-masked]>
---
 fs/exfat/file.c | 2 +-
 fs/exfat/nls.c  | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index f246cf439588..7ce0fb6f2564 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -521,7 +521,7 @@ static int exfat_ioctl_set_volume_label(struct super_block *sb,
 
 	memset(&uniname, 0, sizeof(uniname));
 	if (label[0]) {
-		ret = exfat_nls_to_utf16(sb, label, FSLABEL_MAX,
+		ret = exfat_nls_to_utf16(sb, label, FSLABEL_MAX - 1,
 					 &uniname, &lossy);
 		if (ret < 0)
 			return ret;
diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
index 8243d94ceaf4..57db08a5271c 100644
--- a/fs/exfat/nls.c
+++ b/fs/exfat/nls.c
@@ -616,9 +616,6 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
 		unilen++;
 	}
 
-	if (p_cstring[i] != '\0')
-		lossy |= NLS_NAME_OVERLEN;
-
 	*uniname = '\0';
 	p_uniname->name_len = unilen;
 	p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0,
--

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Hi

no regressions here on x86_64 (RKL, Intel 11th Gen. CPU)

Thanks

Tested-by: Ronald Warsow <[email-masked]>

From - Fri Oct 17 14:26:20 2025
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From: Srinivas Kandagatla <[email-masked]>
To: Wentao Guan <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], [email-masked], [email-masked], 
 WangYuli <[email-masked]>
Subject: Re: [PATCH v2] nvmem: layouts: fix nvmem_layout_bus_uevent
Date: Mon, 13 Oct 2025 16:45:53 +0100
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On Mon, 13 Oct 2025 20:41:29 +0800, Wentao Guan wrote:
> correctly check the ENODEV return value.
> 
> 

Applied, thanks!

[1/1] nvmem: layouts: fix nvmem_layout_bus_uevent
      commit: 8b6322da3c1fd814c2293525f69b776b80fc6895

Best regards,
-- 
Srinivas Kandagatla <[email-masked]>

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Subject: Re: [REGRESSION] bisected: perf: hang when using async-profiler
 caused by perf: Fix the POLL_HUP delivery breakage
To: Peter Zijlstra <[email-masked]>
Cc: Octavia Togami <[email-masked]>, [email-masked],
 [email-masked], [email-masked],
 [email-masked]
From: "Mi, Dapeng" <[email-masked]>
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On 10/13/2025 4:05 PM, Peter Zijlstra wrote:
> On Mon, Oct 13, 2025 at 10:34:27AM +0800, Mi, Dapeng wrote:
>
>> It looks the issue described in the link
>> (https://lore.kernel.org/all/[email-masked]/T/#u)
>> happens again but in a different way. :(
>>
>> As the commit message above link described,  cpu-clock (and task-clock) is
>> a specific SW event which rely on hrtimer. The hrtimer handler calls
>> __perf_event_overflow() and then event_stop (cpu_clock_event_stop()) and
>> eventually call hrtimer_cancel() which traps into a dead loop which waits
>> for the calling hrtimer handler finishes.
>>
>> As the
>> change (https://lore.kernel.org/all/[email-masked]/T/#u),
>> it should be enough to just disable the event and don't need an extra event
>> stop.
>>
>> @Octavia, could you please check if the change below can fix this issue?
>> Thanks.
>>
>> diff --git a/kernel/events/core.c b/kernel/events/core.c
>> index 7541f6f85fcb..883b0e1fa5d3 100644
>> --- a/kernel/events/core.c
>> +++ b/kernel/events/core.c
>> @@ -10343,7 +10343,20 @@ static int __perf_event_overflow(struct perf_event
>> *event,
>>                 ret = 1;
>>                 event->pending_kill = POLL_HUP;
>>                 perf_event_disable_inatomic(event);
>> -               event->pmu->stop(event, 0);
>> +
>> +               /*
>> +                * The cpu-clock and task-clock are two special SW events,
>> +                * which rely on the hrtimer. The __perf_event_overflow()
>> +                * is invoked from the hrtimer handler for these 2 events.
>> +                * Avoid to call event_stop()->hrtimer_cancel() for these
>> +                * 2 events since hrtimer_cancel() waits for the hrtimer
>> +                * handler to finish, which would trigger a deadlock.
>> +                * Only disabling the events is enough to stop the hrtimer.
>> +                * See perf_swevent_cancel_hrtimer().
>> +                */
>> +               if (event->attr.config != PERF_COUNT_SW_CPU_CLOCK &&
>> +                   event->attr.config != PERF_COUNT_SW_TASK_CLOCK)
>> +                       event->pmu->stop(event, 0);
> This is broken though; you cannot test config without first knowing
> which PMU you're dealing with.

Ah, yes. Just ignore this.

>
> Also, that timer really should get stopped, we can't know for certain
> this overflow is of the timer itself or not, it could be a related
> event.
>
> Something like the below might do -- but please carefully consider the
> cases where hrtimer_try_to_cancel() might fail; in those cases we'll
> have set HES_STOPPED and the hrtimer callback *SHOULD* observe this and
> NORESTART.
>
> But I didn't check all the details.

The only reason that hrtimer_try_to_cancel() could fail is that the hrtimer
callback is currently executing, so current change should be fine. 

>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 820127536e62..a91481d57841 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -11756,7 +11756,8 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer)
>  
>  	event = container_of(hrtimer, struct perf_event, hw.hrtimer);
>  
> -	if (event->state != PERF_EVENT_STATE_ACTIVE)
> +	if (event->state != PERF_EVENT_STATE_ACTIVE ||
> +	    event->hw.state & PERF_HES_STOPPED)
>  		return HRTIMER_NORESTART;
>  
>  	event->pmu->read(event);
> @@ -11810,7 +11811,7 @@ static void perf_swevent_cancel_hrtimer(struct perf_event *event)
>  		ktime_t remaining = hrtimer_get_remaining(&hwc->hrtimer);
>  		local64_set(&hwc->period_left, ktime_to_ns(remaining));
>  
> -		hrtimer_cancel(&hwc->hrtimer);
> +		hrtimer_try_to_cancel(&hwc->hrtimer);
>  	}
>  }
>  
> @@ -11854,12 +11855,14 @@ static void cpu_clock_event_update(struct perf_event *event)
>  
>  static void cpu_clock_event_start(struct perf_event *event, int flags)
>  {
> +	event->hw.state = 0;
>  	local64_set(&event->hw.prev_count, local_clock());
>  	perf_swevent_start_hrtimer(event);
>  }
>  
>  static void cpu_clock_event_stop(struct perf_event *event, int flags)
>  {
> +	event->hw.state = PERF_HES_STOPPED;
>  	perf_swevent_cancel_hrtimer(event);
>  	if (flags & PERF_EF_UPDATE)
>  		cpu_clock_event_update(event);

Besides cpu-clock, task-clock should need similar change as well. I would
post a complete change later. 

From - Fri Oct 17 14:26:21 2025
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From: Christian Hitz <[email-masked]>
To: Jacek Anaszewski <[email-masked]>
Cc: Christian Hitz <[email-masked]>,
	Lee Jones <[email-masked]>,
	Pavel Machek <[email-masked]>,
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Subject: Re: [PATCH] leds: leds-lp50xx: allow LED 0 to be added to module bank
Date: Mon, 13 Oct 2025 10:54:42 +0200
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On Sat, 11 Oct 2025 14:16:16 +0200 Jacek Anaszewski <[email-masked]> wrote:

> Hi Christian,
> 
> On 10/8/25 14:32, Christian Hitz wrote:
> > From: Christian Hitz <[email-masked]>
> > 
> > led_banks contains LED module number(s) that should be grouped into the
> > module bank. led_banks is 0-initialized.
> > By checking the led_banks entries for 0, un-set entries are detected.
> > But a 0-entry also indicates that LED module 0 should be grouped into the
> > module bank.
> > 
> > By only iterating over the available entries no check for unused entries
> > is required and LED module 0 can be added to bank.
> > 
> > Signed-off-by: Christian Hitz <[email-masked]>
> > Cc: [email-masked]
> > ---
> >   drivers/leds/leds-lp50xx.c | 10 ++++------
> >   1 file changed, 4 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
> > index 94f8ef6b482c..d50c7f3e8f99 100644
> > --- a/drivers/leds/leds-lp50xx.c
> > +++ b/drivers/leds/leds-lp50xx.c
> > @@ -341,17 +341,15 @@ static int lp50xx_brightness_set(struct led_classdev *cdev,
> >   	return ret;
> >   }
> >   
> > -static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
> > +static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[], int num_leds)
> >   {
> >   	u8 led_config_lo, led_config_hi;
> >   	u32 bank_enable_mask = 0;
> >   	int ret;
> >   	int i;
> >   
> > -	for (i = 0; i < priv->chip_info->max_modules; i++) {
> > -		if (led_banks[i])
> > -			bank_enable_mask |= (1 << led_banks[i]);
> > -	}
> > +	for (i = 0; i < num_leds; i++)
> > +		bank_enable_mask |= (1 << led_banks[i]);
> 
> Probably the first idea was to have a bitmask indicating which bank
> to enable, but it ended up in having array of bank ids in DT with no
> related adjustment in the driver.
> 
> This patch deserves Fixes tag.

This code has not changed since the inital introduction of this driver.

Fixes: 242b81170fb8 ("leds: lp50xx: Add the LP50XX family of the RGB LED driver")

> 
> >   
> >   	led_config_lo = bank_enable_mask;
> >   	led_config_hi = bank_enable_mask >> 8;
> > @@ -405,7 +403,7 @@ static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
> >   			return ret;
> >   		}
> >   
> > -		ret = lp50xx_set_banks(priv, led_banks);
> > +		ret = lp50xx_set_banks(priv, led_banks, num_leds);
> >   		if (ret) {
> >   			dev_err(priv->dev, "Cannot setup banked LEDs\n");
> >   			return ret;
> 
> Reviewed-by: Jacek Anaszewski <[email-masked]>
> 
> -- 
> Best regards,
> Jacek Anaszewski

Sent using hkml (https://github.com/sjp38/hackermail)

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Date: Mon, 13 Oct 2025 18:16:55 +0900
From: Namhyung Kim <[email-masked]>
To: "Mi, Dapeng" <[email-masked]>
Cc: Miaoqian Lin <[email-masked]>,
	Peter Zijlstra <[email-masked]>,
	Ingo Molnar <[email-masked]>,
	Arnaldo Carvalho de Melo <[email-masked]>,
	Mark Rutland <[email-masked]>,
	Alexander Shishkin <[email-masked]>,
	Jiri Olsa <[email-masked]>, Ian Rogers <[email-masked]>,
	Adrian Hunter <[email-masked]>,
	"Liang, Kan" <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] perf tools: Fix bool return value in gzip_is_compressed()
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Hello,

On Sat, Oct 11, 2025 at 11:48:56AM +0800, Mi, Dapeng wrote:
> 
> On 8/28/2025 6:46 PM, Miaoqian Lin wrote:
> > gzip_is_compressed() returns -1 on error but is declared as bool.
> > And -1 gets converted to true, which could be misleading.
> > Return false instead to match the declared type.
> >
> > Fixes: 88c74dc76a30 ("perf tools: Add gzip_is_compressed function")
> > Cc: <[email-masked]>
> > Signed-off-by: Miaoqian Lin <[email-masked]>
> > ---
> >  tools/perf/util/zlib.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c
> > index 78d2297c1b67..1f7c06523059 100644
> > --- a/tools/perf/util/zlib.c
> > +++ b/tools/perf/util/zlib.c
> > @@ -88,7 +88,7 @@ bool gzip_is_compressed(const char *input)
> >  	ssize_t rc;
> >  
> >  	if (fd < 0)
> > -		return -1;
> > +		return false;
> >  
> >  	rc = read(fd, buf, sizeof(buf));
> >  	close(fd);
> 
> Reviewed-by: Dapeng Mi <[email-masked]>

We have 43fa1141e2c1af79 ("perf util: Fix compression checks returning -1
as bool").

Thanks,
Namhyung

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From: Michael Grzeschik <[email-masked]>
Date: Mon, 13 Oct 2025 11:43:40 +0200
Subject: [PATCH v2] tcpm: switch check for role_sw device with fw_node
To: Badhri Jagan Sridharan <[email-masked]>, 
 Heikki Krogerus <[email-masked]>, 
 Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
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 Michael Grzeschik <[email-masked]>
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When there is no port entry in the tcpci entry itself, the driver will
trigger an error message "OF: graph: no port node found in /...../typec" .

It is documented that the dts node should contain an connector entry
with ports and several port pointing to devices with usb-role-switch
property set. Only when those connector entry is missing, it should
check for port entries in the main node.

We switch the search order for looking after ports, which will avoid the
failure message while there are explicit connector entries.

Fixes: d56de8c9a17d ("usb: typec: tcpm: try to get role switch from tcpc fwnode")
Cc: [email-masked]
Signed-off-by: Michael Grzeschik <[email-masked]>
---
Changes in v2:
- fixed typos in the description
- added fixes tag
- added Cc: [email-masked]
- Link to v1: https://lore.kernel.org/r/[email-masked]
---
 drivers/usb/typec/tcpm/tcpm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index b2a568a5bc9b0ba5c50b7031d8e21ee09cefa349..cc78770509dbc6460d75816f544173d6ab4ef873 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -7876,9 +7876,9 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
 
 	port->partner_desc.identity = &port->partner_ident;
 
-	port->role_sw = usb_role_switch_get(port->dev);
+	port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
 	if (!port->role_sw)
-		port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
+		port->role_sw = usb_role_switch_get(port->dev);
 	if (IS_ERR(port->role_sw)) {
 		err = PTR_ERR(port->role_sw);
 		goto out_destroy_wq;

---
base-commit: e406d57be7bd2a4e73ea512c1ae36a40a44e499e
change-id: 20251003-b4-ml-topic-tcpm-27146727d76a

Best regards,
-- 
Michael Grzeschik <[email-masked]>

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Date: Mon, 13 Oct 2025 18:27:58 +0800
Subject: Re: [PATCH] perf tools: Fix bool return value in gzip_is_compressed()
To: Namhyung Kim <[email-masked]>
Cc: Miaoqian Lin <[email-masked]>, Peter Zijlstra <[email-masked]>,
 Ingo Molnar <[email-masked]>, Arnaldo Carvalho de Melo <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Alexander Shishkin <[email-masked]>,
 Jiri Olsa <[email-masked]>, Ian Rogers <[email-masked]>,
 Adrian Hunter <[email-masked]>,
 "Liang, Kan" <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
From: "Mi, Dapeng" <[email-masked]>
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On 10/13/2025 5:16 PM, Namhyung Kim wrote:
> Hello,
>
> On Sat, Oct 11, 2025 at 11:48:56AM +0800, Mi, Dapeng wrote:
>> On 8/28/2025 6:46 PM, Miaoqian Lin wrote:
>>> gzip_is_compressed() returns -1 on error but is declared as bool.
>>> And -1 gets converted to true, which could be misleading.
>>> Return false instead to match the declared type.
>>>
>>> Fixes: 88c74dc76a30 ("perf tools: Add gzip_is_compressed function")
>>> Cc: <[email-masked]>
>>> Signed-off-by: Miaoqian Lin <[email-masked]>
>>> ---
>>>  tools/perf/util/zlib.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c
>>> index 78d2297c1b67..1f7c06523059 100644
>>> --- a/tools/perf/util/zlib.c
>>> +++ b/tools/perf/util/zlib.c
>>> @@ -88,7 +88,7 @@ bool gzip_is_compressed(const char *input)
>>>  	ssize_t rc;
>>>  
>>>  	if (fd < 0)
>>> -		return -1;
>>> +		return false;
>>>  
>>>  	rc = read(fd, buf, sizeof(buf));
>>>  	close(fd);
>> Reviewed-by: Dapeng Mi <[email-masked]>
> We have 43fa1141e2c1af79 ("perf util: Fix compression checks returning -1
> as bool").

Good to know this has been fixed. Thanks. :)

>
> Thanks,
> Namhyung
>

From - Fri Oct 17 14:26:21 2025
Delivery-date: Mon, 13 Oct 2025 05:21:35 +0000
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From: Kurt Borja <[email-masked]>
Date: Mon, 13 Oct 2025 00:21:05 -0500
Subject: [PATCH] platform/x86: alienware-wmi-wmax: Fix null pointer
 derefence in sleep handlers
To: Hans de Goede <[email-masked]>, 
 =?utf-8?q?Ilpo_J=C3=A4rvinen?= <[email-masked]>, 
 Armin Wolf <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], 
 Gal Hammer <[email-masked]>, Kurt Borja <[email-masked]>
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Initialize `awcc` with empty quirks to avoid a null pointer dereference
in sleep handlers for devices without the AWCC interface.

This also allows some code simplification in alienware_wmax_wmi_init().

Cc: [email-masked]
Reported-by: Gal Hammer <[email-masked]>
Tested-by: Gal Hammer <[email-masked]>
Fixes: 07ac275981b1 ("platform/x86: alienware-wmi-wmax: Add support for manual fan control")
Signed-off-by: Kurt Borja <[email-masked]>
---
 drivers/platform/x86/dell/alienware-wmi-wmax.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c
index 31f9643a6a3b5c2eb74b089dc071964bd6df8b43..2c4b71b03c264edaffcb0341bbd9e6acefced8b8 100644
--- a/drivers/platform/x86/dell/alienware-wmi-wmax.c
+++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c
@@ -393,7 +393,7 @@ static const enum platform_profile_option awcc_mode_to_platform_profile[AWCC_PRO
 	[AWCC_PROFILE_LEGACY_PERFORMANCE]		= PLATFORM_PROFILE_PERFORMANCE,
 };
 
-static struct awcc_quirks *awcc;
+static struct awcc_quirks *awcc = &empty_quirks;
 
 /*
  *	The HDMI mux sysfs node indicates the status of the HDMI input mux.
@@ -1680,26 +1680,16 @@ int __init alienware_wmax_wmi_init(void)
 	if (id)
 		awcc = id->driver_data;
 
-	if (force_hwmon) {
-		if (!awcc)
-			awcc = &empty_quirks;
-
+	if (force_hwmon)
 		awcc->hwmon = true;
-	}
-
-	if (force_platform_profile) {
-		if (!awcc)
-			awcc = &empty_quirks;
 
+	if (force_platform_profile)
 		awcc->pprof = true;
-	}
 
-	if (force_gmode) {
-		if (awcc)
-			awcc->gmode = true;
-		else
-			pr_warn("force_gmode requires platform profile support\n");
-	}
+	if (force_gmode && awcc->pprof)
+		awcc->gmode = true;
+	else
+		pr_warn("force_gmode requires platform profile support\n");
 
 	return wmi_driver_register(&alienware_wmax_wmi_driver);
 }

---
base-commit: 3ed17349f18774c24505b0c21dfbd3cc4f126518
change-id: 20251012-sleep-fix-5d0596dd92a3
-- 
 ~ Kurt

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Date: Mon, 13 Oct 2025 08:24:33 +0200
From: Lukas Wunner <[email-masked]>
To: Thorsten Blum <[email-masked]>
Cc: David Howells <[email-masked]>,
	Ignat Korchagin <[email-masked]>,
	Herbert Xu <[email-masked]>,
	"David S. Miller" <[email-masked]>,
	Vivek Goyal <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH v2 1/2] crypto: asymmetric_keys - prevent overflow in
 asymmetric_key_generate_id
                             DNSWL was blocked.  See
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On Sun, Oct 12, 2025 at 10:38:40PM +0200, Thorsten Blum wrote:
> Use check_add_overflow() to guard against a potential integer overflow
> when adding the binary blob lengths in asymmetric_key_generate_id() and
> return -EOVERFLOW accordingly. This prevents a possible buffer overflow
> when copying data from potentially malicious X.509 fields that can be
> arbitrarily large, such as ASN.1 INTEGER serial numbers, issuer names,
> etc.
> 
> Also use struct_size() to calculate the number of bytes to allocate for
> the new asymmetric key id.
> 
> Cc: [email-masked]
> Fixes: 7901c1a8effb ("KEYS: Implement binary asymmetric key ID handling")

No stable designation please, this doesn't pass the "obviously correct"
test, see below.

> +++ b/crypto/asymmetric_keys/asymmetric_type.c
> @@ -141,12 +142,14 @@ struct asymmetric_key_id *asymmetric_key_generate_id(const void *val_1,
>  						     size_t len_2)
>  {
>  	struct asymmetric_key_id *kid;
> +	size_t len;
>  
> -	kid = kmalloc(sizeof(struct asymmetric_key_id) + len_1 + len_2,
> -		      GFP_KERNEL);
> +	if (check_add_overflow(len_1, len_2, &len))
> +		return ERR_PTR(-EOVERFLOW);
> +	kid = kmalloc(struct_size(kid, data, len), GFP_KERNEL);

This will add (at least) 2 bytes to len (namely the size of struct
asymmetric_key_id)) and may cause an overflow (even if len_1 + len_2
did not overflow).

struct_size() truncates to SIZE_MAX and then right below...

>  	if (!kid)
>  		return ERR_PTR(-ENOMEM);
> -	kid->len = len_1 + len_2;
> +	kid->len = len;
>  	memcpy(kid->data, val_1, len_1);
>  	memcpy(kid->data + len_1, val_2, len_2);

... this memcpy() operation will perform an out-of-bound access
beyond SIZE_MAX.

Thanks,

Lukas

From - Fri Oct 17 14:26:21 2025
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Date: Mon, 13 Oct 2025 07:57:56 +0000
Subject: [PATCH] usb: gadget: udc: fix race condition in usb_del_gadget
From: Jimmy Hu <[email-masked]>
To: [email-masked], [email-masked]
Cc: [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked]
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A race condition during gadget teardown can lead to a use-after-free
in usb_gadget_state_work(), as reported by KASAN:

  BUG: KASAN: invalid-access in sysfs_notify+0_x_2c/0_x_d0
  Workqueue: events usb_gadget_state_work

The fundamental race occurs because a concurrent event (e.g., an
interrupt) can call usb_gadget_set_state() and schedule gadget->work
at any time during the cleanup process in usb_del_gadget().

Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after
device removal") attempted to fix this by moving flush_work() to after
device_del(). However, this does not fully solve the race, as a new
work item can still be scheduled *after* flush_work() completes but
before the gadget's memory is freed, leading to the same use-after-free.

This patch fixes the race condition robustly by introducing a 'teardown'
flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is
set during cleanup in usb_del_gadget() *before* calling flush_work() to
prevent any new work from being scheduled once cleanup has commenced.
The scheduling site, usb_gadget_set_state(), now checks this flag under
the lock before queueing the work, thus safely closing the race window.

Fixes: 5702f75375aa9 ("usb: gadget: udc-core: move sysfs_notify() to a workqueue")
Signed-off-by: Jimmy Hu <[email-masked]>
Cc: [email-masked]
---
 drivers/usb/gadget/udc/core.c | 18 +++++++++++++++++-
 include/linux/usb/gadget.h    |  6 ++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index d709e24c1fd4..c4268b76d747 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1123,8 +1123,13 @@ static void usb_gadget_state_work(struct work_struct *work)
 void usb_gadget_set_state(struct usb_gadget *gadget,
 		enum usb_device_state state)
 {
+	unsigned long flags;
+
+	spin_lock_irqsave(&gadget->state_lock, flags);
 	gadget->state = state;
-	schedule_work(&gadget->work);
+	if (!gadget->teardown)
+		schedule_work(&gadget->work);
+	spin_unlock_irqrestore(&gadget->state_lock, flags);
 }
 EXPORT_SYMBOL_GPL(usb_gadget_set_state);
 
@@ -1357,6 +1362,9 @@ static void usb_udc_nop_release(struct device *dev)
 void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
 		void (*release)(struct device *dev))
 {
+	/* For race-free teardown */
+	spin_lock_init(&gadget->state_lock);
+	gadget->teardown = false;
 	INIT_WORK(&gadget->work, usb_gadget_state_work);
 	gadget->dev.parent = parent;
 
@@ -1531,6 +1539,7 @@ EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
 void usb_del_gadget(struct usb_gadget *gadget)
 {
 	struct usb_udc *udc = gadget->udc;
+	unsigned long flags;
 
 	if (!udc)
 		return;
@@ -1544,6 +1553,13 @@ void usb_del_gadget(struct usb_gadget *gadget)
 	kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
 	sysfs_remove_link(&udc->dev.kobj, "gadget");
 	device_del(&gadget->dev);
+	/*
+	 * Set the teardown flag before flushing the work to prevent new work
+	 * from being scheduled while we are cleaning up.
+	 */
+	spin_lock_irqsave(&gadget->state_lock, flags);
+	gadget->teardown = true;
+	spin_unlock_irqrestore(&gadget->state_lock, flags);
 	flush_work(&gadget->work);
 	ida_free(&gadget_id_numbers, gadget->id_number);
 	cancel_work_sync(&udc->vbus_work);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 0f28c5512fcb..8302aeaea82e 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -351,6 +351,9 @@ struct usb_gadget_ops {
  *	can handle. The UDC must support this and all slower speeds and lower
  *	number of lanes.
  * @state: the state we are now (attached, suspended, configured, etc)
+ * @state_lock: Spinlock protecting the `state` and `teardown` members.
+ * @teardown: True if the device is undergoing teardown, used to prevent
+ *	new work from being scheduled during cleanup.
  * @name: Identifies the controller hardware type.  Used in diagnostics
  *	and sometimes configuration.
  * @dev: Driver model state for this abstract device.
@@ -426,6 +429,9 @@ struct usb_gadget {
 	enum usb_ssp_rate		max_ssp_rate;
 
 	enum usb_device_state		state;
+	/* For race-free teardown and state management */
+	spinlock_t			state_lock;
+	bool				teardown;
 	const char			*name;
 	struct device			dev;
 	unsigned			isoch_delay;
-- 
2.51.0.618.g983fd99d29-goog

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Subject: Re: [PATCH v2 1/2] crypto: asymmetric_keys - prevent overflow in
 asymmetric_key_generate_id
From: Thorsten Blum <[email-masked]>
Date: Mon, 13 Oct 2025 10:23:01 +0200
Cc: David Howells <[email-masked]>,
 Ignat Korchagin <[email-masked]>,
 Herbert Xu <[email-masked]>,
 "David S. Miller" <[email-masked]>,
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 [email-masked],
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To: Lukas Wunner <[email-masked]>
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On 13. Oct 2025, at 08:24, Lukas Wunner wrote:
> On Sun, Oct 12, 2025 at 10:38:40PM +0200, Thorsten Blum wrote:
>> +++ b/crypto/asymmetric_keys/asymmetric_type.c
>> @@ -141,12 +142,14 @@ struct asymmetric_key_id =
*asymmetric_key_generate_id(const void *val_1,
>> 						     size_t len_2)
>> {
>> 	struct asymmetric_key_id *kid;
>> +	size_t len;
>>=20
>> -	kid =3D kmalloc(sizeof(struct asymmetric_key_id) + len_1 + =
len_2,
>> -		      GFP_KERNEL);
>> +	if (check_add_overflow(len_1, len_2, &len))
>> +		return ERR_PTR(-EOVERFLOW);
>> +	kid =3D kmalloc(struct_size(kid, data, len), GFP_KERNEL);
>=20
> This will add (at least) 2 bytes to len (namely the size of struct
> asymmetric_key_id)) and may cause an overflow (even if len_1 + len_2
> did not overflow).

Could you explain which part adds "(at least) 2 bytes to len"?

Thanks,
Thorsten

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Date: Mon, 13 Oct 2025 10:31:25 +0200
From: Lukas Wunner <[email-masked]>
To: Thorsten Blum <[email-masked]>
Cc: David Howells <[email-masked]>,
	Ignat Korchagin <[email-masked]>,
	Herbert Xu <[email-masked]>,
	"David S. Miller" <[email-masked]>,
	Vivek Goyal <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH v2 1/2] crypto: asymmetric_keys - prevent overflow in
 asymmetric_key_generate_id
                             medium trust
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On Mon, Oct 13, 2025 at 10:23:01AM +0200, Thorsten Blum wrote:
> On 13. Oct 2025, at 08:24, Lukas Wunner wrote:
> > On Sun, Oct 12, 2025 at 10:38:40PM +0200, Thorsten Blum wrote:
> >> +++ b/crypto/asymmetric_keys/asymmetric_type.c
> >> @@ -141,12 +142,14 @@ struct asymmetric_key_id *asymmetric_key_generate_id(const void *val_1,
> >> 						     size_t len_2)
> >> {
> >> 	struct asymmetric_key_id *kid;
> >> +	size_t len;
> >> 
> >> -	kid = kmalloc(sizeof(struct asymmetric_key_id) + len_1 + len_2,
> >> -		      GFP_KERNEL);
> >> +	if (check_add_overflow(len_1, len_2, &len))
> >> +		return ERR_PTR(-EOVERFLOW);
> >> +	kid = kmalloc(struct_size(kid, data, len), GFP_KERNEL);
> > 
> > This will add (at least) 2 bytes to len (namely the size of struct
> > asymmetric_key_id)) and may cause an overflow (even if len_1 + len_2
> > did not overflow).
> 
> Could you explain which part adds "(at least) 2 bytes to len"?

The struct_size() macro performs another size_add() to add the
size of struct asymmetric_key_id (which is at least 2 bytes) to len:

#define struct_size(p, member, count)					\
	__builtin_choose_expr(__is_constexpr(count),			\
		sizeof(*(p)) + flex_array_size(p, member, count),	\
		size_add(sizeof(*(p)), flex_array_size(p, member, count)))
                ^^^^^^^^

So there's an addition of three numbers, yet you're only checking that
the addition of two of them doesn't overflow.

Thanks,

Lukas

From - Fri Oct 17 14:26:21 2025
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Subject: Re: [PATCH] net: usb: lan78xx: Fix lost EEPROM write timeout
 error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
From: [email-masked]
Date: Sun, 12 Oct 2025 17:20:05 +0000
To: Bhanu Seshu Kumar Valluri <[email-masked]>
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <[email-masked]>:

On Thu,  9 Oct 2025 11:00:09 +0530 you wrote:
> The function lan78xx_write_raw_eeprom failed to properly propagate EEPROM
> write timeout errors (-ETIMEDOUT). In the timeout  fallthrough path, it first
> attempted to restore the pin configuration for LED outputs and then
> returned only the status of that restore operation, discarding the
> original timeout error saved in ret.
> 
> As a result, callers could mistakenly treat EEPROM write operation as
> successful even though the EEPROM write had actually timed out with no
> or partial data write.
> 
> [...]

Here is the summary with links:
  - net: usb: lan78xx: Fix lost EEPROM write timeout error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
    https://git.kernel.org/netdev/net/c/d5d790ba1558

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

From - Fri Oct 17 14:26:21 2025
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From: Thorsten Blum <[email-masked]>
To: David Howells <[email-masked]>,
	Lukas Wunner <[email-masked]>,
	Ignat Korchagin <[email-masked]>,
	Herbert Xu <[email-masked]>,
	"David S. Miller" <[email-masked]>,
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Cc: Thorsten Blum <[email-masked]>,
	[email-masked],
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	[email-masked],
	[email-masked]
Subject: [PATCH v2 1/2] crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id
Date: Sun, 12 Oct 2025 22:38:40 +0200
DKIMCheck: Server passes DKIM test, 0 Spam score
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Use check_add_overflow() to guard against a potential integer overflow
when adding the binary blob lengths in asymmetric_key_generate_id() and
return -EOVERFLOW accordingly. This prevents a possible buffer overflow
when copying data from potentially malicious X.509 fields that can be
arbitrarily large, such as ASN.1 INTEGER serial numbers, issuer names,
etc.

Also use struct_size() to calculate the number of bytes to allocate for
the new asymmetric key id.

Cc: [email-masked]
Fixes: 7901c1a8effb ("KEYS: Implement binary asymmetric key ID handling")
Signed-off-by: Thorsten Blum <[email-masked]>
---
Changes in v2:
- Use check_add_overflow() and error out as suggested by Lukas
- Update patch description
- Add Fixes: tag and @stable for backporting
- Link to v1: https://lore.kernel.org/lkml/[email-masked]/
---
 crypto/asymmetric_keys/asymmetric_type.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/crypto/asymmetric_keys/asymmetric_type.c b/crypto/asymmetric_keys/asymmetric_type.c
index ba2d9d1ea235..bd96f799757d 100644
--- a/crypto/asymmetric_keys/asymmetric_type.c
+++ b/crypto/asymmetric_keys/asymmetric_type.c
@@ -11,6 +11,7 @@
 #include <crypto/public_key.h>
 #include <linux/seq_file.h>
 #include <linux/module.h>
+#include <linux/overflow.h>
 #include <linux/slab.h>
 #include <linux/ctype.h>
 #include <keys/system_keyring.h>
@@ -141,12 +142,14 @@ struct asymmetric_key_id *asymmetric_key_generate_id(const void *val_1,
 						     size_t len_2)
 {
 	struct asymmetric_key_id *kid;
+	size_t len;
 
-	kid = kmalloc(sizeof(struct asymmetric_key_id) + len_1 + len_2,
-		      GFP_KERNEL);
+	if (check_add_overflow(len_1, len_2, &len))
+		return ERR_PTR(-EOVERFLOW);
+	kid = kmalloc(struct_size(kid, data, len), GFP_KERNEL);
 	if (!kid)
 		return ERR_PTR(-ENOMEM);
-	kid->len = len_1 + len_2;
+	kid->len = len;
 	memcpy(kid->data, val_1, len_1);
 	memcpy(kid->data + len_1, val_2, len_2);
 	return kid;
-- 
2.51.0

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From: Krishna Kurapati <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>,
        Rob Herring <[email-masked]>,
        Krzysztof Kozlowski <[email-masked]>,
        Conor Dooley <[email-masked]>,
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Cc: [email-masked], [email-masked],
        [email-masked], [email-masked],
        Krishna Kurapati <[email-masked]>,
        [email-masked]
Subject: [PATCH v2] dt-bindings: usb: qcom,snps-dwc3: Fix bindings for X1E80100
Date: Mon, 13 Oct 2025 09:29:20 +0530
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Add the missing multiport controller binding to target list.

Fix minItems for interrupt-names to avoid the following error on High
Speed controller:

usb@a200000: interrupt-names: ['dwc_usb3', 'pwr_event', 'dp_hs_phy_irq', 'dm_hs_phy_irq'] is too short

Fixes: 6e762f7b8edc ("dt-bindings: usb: Introduce qcom,snps-dwc3")
Cc: [email-masked]
Signed-off-by: Krishna Kurapati <[email-masked]>
---
Changes in v2:
Added fixes tag and put error log in one line.

Link to v1:
https://lore.kernel.org/all/[email-masked]/

 Documentation/devicetree/bindings/usb/qcom,snps-dwc3.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/qcom,snps-dwc3.yaml b/Documentation/devicetree/bindings/usb/qcom,snps-dwc3.yaml
index dfd084ed9024..d49a58d5478f 100644
--- a/Documentation/devicetree/bindings/usb/qcom,snps-dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/qcom,snps-dwc3.yaml
@@ -68,6 +68,7 @@ properties:
           - qcom,sm8550-dwc3
           - qcom,sm8650-dwc3
           - qcom,x1e80100-dwc3
+          - qcom,x1e80100-dwc3-mp
       - const: qcom,snps-dwc3
 
   reg:
@@ -460,8 +461,10 @@ allOf:
     then:
       properties:
         interrupts:
+          minItems: 4
           maxItems: 5
         interrupt-names:
+          minItems: 4
           items:
             - const: dwc_usb3
             - const: pwr_event
-- 
2.34.1

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Date: Mon, 13 Oct 2025 06:05:52 +0200
Subject: Re: [PATCH v2] dt-bindings: usb: qcom,snps-dwc3: Fix bindings for
 X1E80100
To: Krishna Kurapati <[email-masked]>,
 Greg Kroah-Hartman <[email-masked]>,
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On 13/10/2025 05:59, Krishna Kurapati wrote:
> Add the missing multiport controller binding to target list.
> 
> Fix minItems for interrupt-names to avoid the following error on High
> Speed controller:
> 
> usb@a200000: interrupt-names: ['dwc_usb3', 'pwr_event', 'dp_hs_phy_irq', 'dm_hs_phy_irq'] is too short
> 
> Fixes: 6e762f7b8edc ("dt-bindings: usb: Introduce qcom,snps-dwc3")
> Cc: [email-masked]
> Signed-off-by: Krishna Kurapati <[email-masked]>
> ---

Reviewed-by: Krzysztof Kozlowski <[email-masked]>

Best regards,
Krzysztof

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From: Kairui Song <[email-masked]>
Date: Mon, 13 Oct 2025 00:49:00 +0800
Subject: Re: [PATCH 1/4] mm, swap: do not perform synchronous discard during allocation
To: Chris Li <[email-masked]>
Cc: [email-masked], Andrew Morton <[email-masked]>, 
	Kemeng Shi <[email-masked]>, Nhat Pham <[email-masked]>, 
	Baoquan He <[email-masked]>, Barry Song <[email-masked]>, 
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	[email-masked], [email-masked]
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On Thu, Oct 9, 2025 at 5:10=E2=80=AFAM Chris Li <[email-masked]> wrote:
>
> Hi Kairui,
>
> First of all, your title is a bit misleading:
> "do not perform synchronous discard during allocation"
>
> You still do the synchronous discard, just limited to order 0 failing.
>
> Also your commit did not describe the behavior change of this patch.
> The behavior change is that, it now prefers to allocate from the
> fragment list before waiting for the discard. Which I feel is not
> justified.
>
> After reading your patch, I feel that you still do the synchronous
> discard, just now you do it with less lock held.
> I suggest you just fix the lock held issue without changing the
> discard ordering behavior.
>
> On Mon, Oct 6, 2025 at 1:03=E2=80=AFPM Kairui Song <[email-masked]> wro=
te:
> >
> > From: Kairui Song <[email-masked]>
> >
> > Since commit 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation
> > fast path"), swap allocation is protected by a local lock, which means
> > we can't do any sleeping calls during allocation.
> >
> > However, the discard routine is not taken well care of. When the swap
> > allocator failed to find any usable cluster, it would look at the
> > pending discard cluster and try to issue some blocking discards. It may
> > not necessarily sleep, but the cond_resched at the bio layer indicates
> > this is wrong when combined with a local lock. And the bio GFP flag use=
d
> > for discard bio is also wrong (not atomic).
>
> If lock is the issue, let's fix the lock issue.
>
> > It's arguable whether this synchronous discard is helpful at all. In
> > most cases, the async discard is good enough. And the swap allocator is
> > doing very differently at organizing the clusters since the recent
> > change, so it is very rare to see discard clusters piling up.
>
> Very rare does not mean this never happens. If you have a cluster on
> the discarding queue, I think it is better to wait for the discard to
> complete before using the fragmented list, to reduce the
> fragmentation. So it seems the real issue is holding a lock while
> doing the block discard?
>
> > So far, no issues have been observed or reported with typical SSD setup=
s
> > under months of high pressure. This issue was found during my code
> > review. But by hacking the kernel a bit: adding a mdelay(100) in the
> > async discard path, this issue will be observable with WARNING triggere=
d
> > by the wrong GFP and cond_resched in the bio layer.
>
> I think that makes an assumption on how slow the SSD discard is. Some
> SSD can be really slow. We want our kernel to work for those slow
> discard SSD cases as well.
>
> > So let's fix this issue in a safe way: remove the synchronous discard i=
n
> > the swap allocation path. And when order 0 is failing with all cluster
> > list drained on all swap devices, try to do a discard following the swa=
p
>
> I don't feel that changing the discard behavior is justified here, the
> real fix is discarding with less lock held. Am I missing something?
> If I understand correctly, we should be able to keep the current
> discard ordering behavior, discard before the fragment list. But with
> less lock held as your current patch does.
>
> I suggest the allocation here detects there is a discard pending and
> running out of free blocks. Return there and indicate the need to
> discard. The caller performs the discard without holding the lock,
> similar to what you do with the order =3D=3D 0 case.
>
> > device priority list. If any discards released some cluster, try the
> > allocation again. This way, we can still avoid OOM due to swap failure
> > if the hardware is very slow and memory pressure is extremely high.
> >
> > Cc: <[email-masked]>
> > Fixes: 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation fast =
path")
> > Signed-off-by: Kairui Song <[email-masked]>
> > ---
> >  mm/swapfile.c | 40 +++++++++++++++++++++++++++++++++-------
> >  1 file changed, 33 insertions(+), 7 deletions(-)
> >
> > diff --git a/mm/swapfile.c b/mm/swapfile.c
> > index cb2392ed8e0e..0d1924f6f495 100644
> > --- a/mm/swapfile.c
> > +++ b/mm/swapfile.c
> > @@ -1101,13 +1101,6 @@ static unsigned long cluster_alloc_swap_entry(st=
ruct swap_info_struct *si, int o
> >                         goto done;
> >         }
> >
> > -       /*
> > -        * We don't have free cluster but have some clusters in discard=
ing,
> > -        * do discard now and reclaim them.
> > -        */
> > -       if ((si->flags & SWP_PAGE_DISCARD) && swap_do_scheduled_discard=
(si))
> > -               goto new_cluster;
>
> Assume you follow my suggestion.
> Change this to some function to detect if there is a pending discard
> on this device. Return to the caller indicating that you need a
> discard for this device that has a pending discard.
> Add an output argument to indicate the discard device "discard" if needed=
.

The problem I just realized is that, if we just bail out here, we are
forbidding order 0 to steal if there is any discarding cluster. We
just return here to let the caller handle the discard outside
the lock.

It may just discard the cluster just fine, then retry from free clusters.
Then everything is fine, that's the easy part.

But it might also fail, and interestingly, in the failure case we need
to try again as well. It might fail with a race with another discard,
in that case order 0 steal is still feasible. Or it fail with
get_swap_device_info (we have to release the device to return here),
in that case we should go back to the plist and try other devices.

This is doable but seems kind of fragile, we'll have something like
this in the folio_alloc_swap function:

local_lock(&percpu_swap_cluster.lock);
if (!swap_alloc_fast(&entry, order))
    swap_alloc_slow(&entry, order, &discard_si);
local_unlock(&percpu_swap_cluster.lock);

+if (discard_si) {
+    if (get_swap_device_info(discard_si)) {
+        swap_do_scheduled_discard(discard_si);
+        put_swap_device(discard_si);
+        /*
+         * Ignoring the return value, since we need to try
+         * again even if the discard failed. If failed due to
+         * race with another discard, we should still try
+         * order 0 steal.
+         */
+    } else {
+        discard_si =3D NULL;
+        /*
+         * If raced with swapoff, we should try again too but
+         * not using the discard device anymore.
+         */
+    }
+    goto again;
+}

And the `again` retry we'll have to always start from free_clusters again,
unless we have another parameter just to indicate that we want to skip
everything and jump to stealing, or pass and reuse the discard_si
pointer as return argument to cluster_alloc_swap_entry as well,
as the indicator to jump to stealing directly.

It looks kind of strange. So far swap_do_scheduled_discard can only
fail due to a race with another successful discard, so retrying is
safe and won't run into an endless loop. But it seems easy to break,
e.g. if we may handle bio alloc failure of discard request in the
future. And trying again if get_swap_device_info failed makes no sense
if there is only one device, but has to be done here to cover
multi-device usage, or we have to add more special checks.

swap_alloc_slow will be a bit longer too if we want to prevent
touching plist again:
+/*
+ * Resuming after trying to discard cluster on a swap device,
+ * try the discarded device first.
+ */
+si =3D *discard_si;
+if (unlikely(si)) {
+    *discard_si =3D NULL;
+    if (get_swap_device_info(si)) {
+        offset =3D cluster_alloc_swap_entry(si, order, SWAP_HAS_CACHE,
&need_discard);
+        put_swap_device(si);
+        if (offset) {
+            *entry =3D swp_entry(si->type, offset);
+            return true;
+        }
+        if (need_discard) {
+            *discard_si =3D si;
+            return false;
+        }
+    }
+}

The logic of the workflow jumping between several functions might also
be kind of hard to follow. Some cleanup can be done later though.

Considering the discard issue is really rare, I'm not sure if this is
the right way to go? How do you think?

BTW: The logic of V1 can be optimized a little bit to let discards also
happen with order > 0 cases too. That seems closer to what the current
upstream kernel was doing except: Allocator prefers to try another
device instead of waiting for discard, which seems OK?
And order 0 steal can happen without waiting for discard.
Fragmentation under extreme pressure might not be that
serious an issue if we are having really slow SSDs, and
might even be no longer an issue if we have a generic
solution for frags?

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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Re: Linux 6.17.2
Date: Sun, 12 Oct 2025 13:24:29 +0200
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diff --git a/Makefile b/Makefile
index 389bfac0adaa..a04d0223dc84 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 17
-SUBLEVEL = 1
+SUBLEVEL = 2
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1349e278cd2a..542d3664afa3 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5107,12 +5107,11 @@ void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 	ctxt->mem_read.end = 0;
 }
 
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts)
 {
 	const struct x86_emulate_ops *ops = ctxt->ops;
 	int rc = X86EMUL_CONTINUE;
 	int saved_dst_type = ctxt->dst.type;
-	bool is_guest_mode = ctxt->ops->is_guest_mode(ctxt);
 
 	ctxt->mem_read.pos = 0;
 
@@ -5160,7 +5159,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(&ctxt->dst);
 		}
 
-		if (unlikely(is_guest_mode) && ctxt->intercept) {
+		if (unlikely(check_intercepts) && ctxt->intercept) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5189,7 +5188,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				goto done;
 		}
 
-		if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+		if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5243,7 +5242,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+	if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index c1df5acfacaf..7b5ddb787a25 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -235,7 +235,6 @@ struct x86_emulate_ops {
 	void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked);
 
 	bool (*is_smm)(struct x86_emulate_ctxt *ctxt);
-	bool (*is_guest_mode)(struct x86_emulate_ctxt *ctxt);
 	int (*leave_smm)(struct x86_emulate_ctxt *ctxt);
 	void (*triple_fault)(struct x86_emulate_ctxt *ctxt);
 	int (*set_xcr)(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr);
@@ -521,7 +520,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt);
 #define EMULATION_RESTART 1
 #define EMULATION_INTERCEPTED 2
 void init_decode_cache(struct x86_emulate_ctxt *ctxt);
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts);
 int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
 			 u16 tss_selector, int idt_index, int reason,
 			 bool has_error_code, u32 error_code);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 706b6fd56d3c..e6ae226704cb 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8470,11 +8470,6 @@ static bool emulator_is_smm(struct x86_emulate_ctxt *ctxt)
 	return is_smm(emul_to_vcpu(ctxt));
 }
 
-static bool emulator_is_guest_mode(struct x86_emulate_ctxt *ctxt)
-{
-	return is_guest_mode(emul_to_vcpu(ctxt));
-}
-
 #ifndef CONFIG_KVM_SMM
 static int emulator_leave_smm(struct x86_emulate_ctxt *ctxt)
 {
@@ -8558,7 +8553,6 @@ static const struct x86_emulate_ops emulate_ops = {
 	.guest_cpuid_is_intel_compatible = emulator_guest_cpuid_is_intel_compatible,
 	.set_nmi_mask        = emulator_set_nmi_mask,
 	.is_smm              = emulator_is_smm,
-	.is_guest_mode       = emulator_is_guest_mode,
 	.leave_smm           = emulator_leave_smm,
 	.triple_fault        = emulator_triple_fault,
 	.set_xcr             = emulator_set_xcr,
@@ -9143,7 +9137,14 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		ctxt->exception.address = 0;
 	}
 
-	r = x86_emulate_insn(ctxt);
+	/*
+	 * Check L1's instruction intercepts when emulating instructions for
+	 * L2, unless KVM is re-emulating a previously decoded instruction,
+	 * e.g. to complete userspace I/O, in which case KVM has already
+	 * checked the intercepts.
+	 */
+	r = x86_emulate_insn(ctxt, is_guest_mode(vcpu) &&
+				   !(emulation_type & EMULTYPE_NO_DECODE));
 
 	if (r == EMULATION_INTERCEPTED)
 		return 1;
diff --git a/crypto/rng.c b/crypto/rng.c
index b8ae6ebc091d..ee1768c5a400 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -168,6 +168,11 @@ int crypto_del_default_rng(void)
 EXPORT_SYMBOL_GPL(crypto_del_default_rng);
 #endif
 
+static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data,
+				unsigned int len)
+{
+}
+
 int crypto_register_rng(struct rng_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
@@ -179,6 +184,9 @@ int crypto_register_rng(struct rng_alg *alg)
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_RNG;
 
+	if (!alg->set_ent)
+		alg->set_ent = rng_default_set_ent;
+
 	return crypto_register_alg(base);
 }
 EXPORT_SYMBOL_GPL(crypto_register_rng);
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index ee33ba21ae2b..3e284706152a 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -4186,6 +4186,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.alg = "authenc(hmac(sha1),cbc(aes))",
 		.generic_driver = "authenc(hmac-sha1-lib,cbc(aes-generic))",
 		.test = alg_test_aead,
+		.fips_allowed = 1,
 		.suite = {
 			.aead = __VECS(hmac_sha1_aes_cbc_tv_temp)
 		}
@@ -4206,6 +4207,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 	}, {
 		.alg = "authenc(hmac(sha1),ctr(aes))",
 		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "authenc(hmac(sha1),ecb(cipher_null))",
 		.generic_driver = "authenc(hmac-sha1-lib,ecb-cipher_null)",
@@ -4216,6 +4218,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 	}, {
 		.alg = "authenc(hmac(sha1),rfc3686(ctr(aes)))",
 		.test = alg_test_null,
+		.fips_allowed = 1,
 	}, {
 		.alg = "authenc(hmac(sha224),cbc(des))",
 		.generic_driver = "authenc(hmac-sha224-lib,cbc(des-generic))",
@@ -5078,6 +5081,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.alg = "hmac(sha1)",
 		.generic_driver = "hmac-sha1-lib",
 		.test = alg_test_hash,
+		.fips_allowed = 1,
 		.suite = {
 			.hash = __VECS(hmac_sha1_tv_template)
 		}
@@ -5448,6 +5452,7 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.alg = "sha1",
 		.generic_driver = "sha1-lib",
 		.test = alg_test_hash,
+		.fips_allowed = 1,
 		.suite = {
 			.hash = __VECS(sha1_tv_template)
 		}
diff --git a/crypto/zstd.c b/crypto/zstd.c
index c2a19cb0879d..ac318d333b68 100644
--- a/crypto/zstd.c
+++ b/crypto/zstd.c
@@ -83,7 +83,7 @@ static void zstd_exit(struct crypto_acomp *acomp_tfm)
 static int zstd_compress_one(struct acomp_req *req, struct zstd_ctx *ctx,
 			     const void *src, void *dst, unsigned int *dlen)
 {
-	unsigned int out_len;
+	size_t out_len;
 
 	ctx->cctx = zstd_init_cctx(ctx->wksp, ctx->wksp_size);
 	if (!ctx->cctx)
diff --git a/drivers/android/dbitmap.h b/drivers/android/dbitmap.h
index 956f1bd087d1..c7299ce8b374 100644
--- a/drivers/android/dbitmap.h
+++ b/drivers/android/dbitmap.h
@@ -37,6 +37,7 @@ static inline void dbitmap_free(struct dbitmap *dmap)
 {
 	dmap->nbits = 0;
 	kfree(dmap->map);
+	dmap->map = NULL;
 }
 
 /* Returns the nbits that a dbitmap can shrink to, 0 if not possible. */
diff --git a/drivers/base/faux.c b/drivers/base/faux.c
index f5fbda0a9a44..21dd02124231 100644
--- a/drivers/base/faux.c
+++ b/drivers/base/faux.c
@@ -155,6 +155,7 @@ struct faux_device *faux_device_create_with_groups(const char *name,
 		dev->parent = &faux_bus_root;
 	dev->bus = &faux_bus_type;
 	dev_set_name(dev, "%s", name);
+	device_set_pm_not_required(dev);
 
 	ret = device_add(dev);
 	if (ret) {
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8085fabadde8..3595a8bad6bd 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -522,6 +522,8 @@ static const struct usb_device_id quirks_table[] = {
 	/* Realtek 8851BU Bluetooth devices */
 	{ USB_DEVICE(0x3625, 0x010b), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x2001, 0x332a), .driver_info = BTUSB_REALTEK |
+						     BTUSB_WIDEBAND_SPEECH },
 
 	/* Realtek 8852AE Bluetooth devices */
 	{ USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 3f6a828cad8a..1445da1f53af 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -711,6 +711,12 @@ static int mes_v11_0_set_hw_resources(struct amdgpu_mes *mes)
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
 	mes_set_hw_res_pkt.oversubscription_timer = 50;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x7f)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(mes->adev->dev,
+			      "MES FW version must be >= 0x7f to enable LR compute workaround.\n");
+
 	if (amdgpu_mes_log_enable) {
 		mes_set_hw_res_pkt.enable_mes_event_int_logging = 1;
 		mes_set_hw_res_pkt.event_intr_history_gpu_mc_ptr =
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index 6b222630f3fa..39caac14d5fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -738,6 +738,11 @@ static int mes_v12_0_set_hw_resources(struct amdgpu_mes *mes, int pipe)
 	mes_set_hw_res_pkt.use_different_vmid_compute = 1;
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x82)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(adev->dev,
+			      "MES FW version must be >= 0x82 to enable LR compute workaround.\n");
 
 	/*
 	 * Keep oversubscribe timer for sdma . When we have unmapped doorbell
diff --git a/drivers/gpu/drm/amd/include/mes_v11_api_def.h b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
index 15680c3f4970..ab1cfc92dbeb 100644
--- a/drivers/gpu/drm/amd/include/mes_v11_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
@@ -238,7 +238,8 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t enable_mes_sch_stb_log : 1;
 				uint32_t limit_single_process : 1;
 				uint32_t is_strix_tmz_wa_enabled  :1;
-				uint32_t reserved : 13;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 12;
 			};
 			uint32_t	uint32_t_all;
 		};
diff --git a/drivers/gpu/drm/amd/include/mes_v12_api_def.h b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
index d85ffab2aff9..a402974939d6 100644
--- a/drivers/gpu/drm/amd/include/mes_v12_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
@@ -286,7 +286,8 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t limit_single_process : 1;
 				uint32_t unmapped_doorbell_handling: 2;
 				uint32_t enable_mes_fence_int: 1;
-				uint32_t reserved : 10;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 9;
 			};
 			uint32_t uint32_all;
 		};
diff --git a/drivers/misc/amd-sbi/Kconfig b/drivers/misc/amd-sbi/Kconfig
index 4840831c84ca..4aae0733d0fc 100644
--- a/drivers/misc/amd-sbi/Kconfig
+++ b/drivers/misc/amd-sbi/Kconfig
@@ -2,6 +2,7 @@
 config AMD_SBRMI_I2C
 	tristate "AMD side band RMI support"
 	depends on I2C
+	select REGMAP_I2C
 	help
 	  Side band RMI over I2C support for AMD out of band management.
 
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index 831b5025c634..018f5afcd50d 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -8172,8 +8172,6 @@ static const struct usb_device_id dev_table[] = {
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x06f8, 0xe033, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
-{USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8188, 0xff, 0xff, 0xff),
-	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8189, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9041, 0xff, 0xff, 0xff),
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
index 00a6778df704..9480823af838 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
@@ -291,7 +291,6 @@ static const struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x050d, 0x1102, rtl92cu_hal_cfg)}, /*Belkin - Edimax*/
 	{RTL_USB_DEVICE(0x050d, 0x11f2, rtl92cu_hal_cfg)}, /*Belkin - ISY*/
 	{RTL_USB_DEVICE(0x06f8, 0xe033, rtl92cu_hal_cfg)}, /*Hercules - Edimax*/
-	{RTL_USB_DEVICE(0x07b8, 0x8188, rtl92cu_hal_cfg)}, /*Abocom - Abocom*/
 	{RTL_USB_DEVICE(0x07b8, 0x8189, rtl92cu_hal_cfg)}, /*Funai - Abocom*/
 	{RTL_USB_DEVICE(0x0846, 0x9041, rtl92cu_hal_cfg)}, /*NetGear WNA1000M*/
 	{RTL_USB_DEVICE(0x0846, 0x9043, rtl92cu_hal_cfg)}, /*NG WNA1000Mv2*/
diff --git a/drivers/nvmem/layouts.c b/drivers/nvmem/layouts.c
index 65d39e19f6ec..f381ce1e84bd 100644
--- a/drivers/nvmem/layouts.c
+++ b/drivers/nvmem/layouts.c
@@ -45,11 +45,24 @@ static void nvmem_layout_bus_remove(struct device *dev)
 	return drv->remove(layout);
 }
 
+static int nvmem_layout_bus_uevent(const struct device *dev,
+				   struct kobj_uevent_env *env)
+{
+	int ret;
+
+	ret = of_device_uevent_modalias(dev, env);
+	if (ret != ENODEV)
+		return ret;
+
+	return 0;
+}
+
 static const struct bus_type nvmem_layout_bus_type = {
 	.name		= "nvmem-layout",
 	.match		= nvmem_layout_bus_match,
 	.probe		= nvmem_layout_bus_probe,
 	.remove		= nvmem_layout_bus_remove,
+	.uevent		= nvmem_layout_bus_uevent,
 };
 
 int __nvmem_layout_driver_register(struct nvmem_layout_driver *drv,
diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c
index 57ed58065eba..b6261b96e465 100644
--- a/drivers/staging/axis-fifo/axis-fifo.c
+++ b/drivers/staging/axis-fifo/axis-fifo.c
@@ -43,7 +43,6 @@
 #define DRIVER_NAME "axis_fifo"
 
 #define READ_BUF_SIZE 128U /* read buffer length in words */
-#define WRITE_BUF_SIZE 128U /* write buffer length in words */
 
 #define AXIS_FIFO_DEBUG_REG_NAME_MAX_LEN	4
 
@@ -228,6 +227,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 	}
 
 	bytes_available = ioread32(fifo->base_addr + XLLF_RLR_OFFSET);
+	words_available = bytes_available / sizeof(u32);
 	if (!bytes_available) {
 		dev_err(fifo->dt_device, "received a packet of length 0\n");
 		ret = -EIO;
@@ -238,7 +238,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		dev_err(fifo->dt_device, "user read buffer too small (available bytes=%zu user buffer bytes=%zu)\n",
 			bytes_available, len);
 		ret = -EINVAL;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
 	if (bytes_available % sizeof(u32)) {
@@ -247,11 +247,9 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		 */
 		dev_err(fifo->dt_device, "received a packet that isn't word-aligned\n");
 		ret = -EIO;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
-	words_available = bytes_available / sizeof(u32);
-
 	/* read data into an intermediate buffer, copying the contents
 	 * to userspace when the buffer is full
 	 */
@@ -263,18 +261,23 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 			tmp_buf[i] = ioread32(fifo->base_addr +
 					      XLLF_RDFD_OFFSET);
 		}
+		words_available -= copy;
 
 		if (copy_to_user(buf + copied * sizeof(u32), tmp_buf,
 				 copy * sizeof(u32))) {
 			ret = -EFAULT;
-			goto end_unlock;
+			goto err_flush_rx;
 		}
 
 		copied += copy;
-		words_available -= copy;
 	}
+	mutex_unlock(&fifo->read_lock);
+
+	return bytes_available;
 
-	ret = bytes_available;
+err_flush_rx:
+	while (words_available--)
+		ioread32(fifo->base_addr + XLLF_RDFD_OFFSET);
 
 end_unlock:
 	mutex_unlock(&fifo->read_lock);
@@ -302,11 +305,8 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 {
 	struct axis_fifo *fifo = (struct axis_fifo *)f->private_data;
 	unsigned int words_to_write;
-	unsigned int copied;
-	unsigned int copy;
-	unsigned int i;
+	u32 *txbuf;
 	int ret;
-	u32 tmp_buf[WRITE_BUF_SIZE];
 
 	if (len % sizeof(u32)) {
 		dev_err(fifo->dt_device,
@@ -322,11 +322,17 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		return -EINVAL;
 	}
 
-	if (words_to_write > fifo->tx_fifo_depth) {
-		dev_err(fifo->dt_device, "tried to write more words [%u] than slots in the fifo buffer [%u]\n",
-			words_to_write, fifo->tx_fifo_depth);
+	/*
+	 * In 'Store-and-Forward' mode, the maximum packet that can be
+	 * transmitted is limited by the size of the FIFO, which is
+	 * (C_TX_FIFO_DEPTH–4)*(data interface width/8) bytes.
+	 *
+	 * Do not attempt to send a packet larger than 'tx_fifo_depth - 4',
+	 * otherwise a 'Transmit Packet Overrun Error' interrupt will be
+	 * raised, which requires a reset of the TX circuit to recover.
+	 */
+	if (words_to_write > (fifo->tx_fifo_depth - 4))
 		return -EINVAL;
-	}
 
 	if (fifo->write_flags & O_NONBLOCK) {
 		/*
@@ -365,32 +371,20 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		}
 	}
 
-	/* write data from an intermediate buffer into the fifo IP, refilling
-	 * the buffer with userspace data as needed
-	 */
-	copied = 0;
-	while (words_to_write > 0) {
-		copy = min(words_to_write, WRITE_BUF_SIZE);
-
-		if (copy_from_user(tmp_buf, buf + copied * sizeof(u32),
-				   copy * sizeof(u32))) {
-			ret = -EFAULT;
-			goto end_unlock;
-		}
-
-		for (i = 0; i < copy; i++)
-			iowrite32(tmp_buf[i], fifo->base_addr +
-				  XLLF_TDFD_OFFSET);
-
-		copied += copy;
-		words_to_write -= copy;
+	txbuf = vmemdup_user(buf, len);
+	if (IS_ERR(txbuf)) {
+		ret = PTR_ERR(txbuf);
+		goto end_unlock;
 	}
 
-	ret = copied * sizeof(u32);
+	for (int i = 0; i < words_to_write; ++i)
+		iowrite32(txbuf[i], fifo->base_addr + XLLF_TDFD_OFFSET);
 
 	/* write packet size to fifo */
-	iowrite32(ret, fifo->base_addr + XLLF_TLR_OFFSET);
+	iowrite32(len, fifo->base_addr + XLLF_TLR_OFFSET);
 
+	ret = len;
+	kvfree(txbuf);
 end_unlock:
 	mutex_unlock(&fifo->write_lock);
 
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 44427415a80d..2829950d5bcb 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1412,7 +1412,7 @@ config SERIAL_STM32
 
 config SERIAL_STM32_CONSOLE
 	bool "Support for console on STM32"
-	depends on SERIAL_STM32=y
+	depends on SERIAL_STM32
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
 
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 32ec632fd080..81f385d900d0 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -11,7 +11,6 @@
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/pm_domain.h>
 #include <linux/pm_opp.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
@@ -100,16 +99,10 @@
 #define DMA_RX_BUF_SIZE		2048
 
 static DEFINE_IDA(port_ida);
-#define DOMAIN_IDX_POWER	0
-#define DOMAIN_IDX_PERF		1
 
 struct qcom_geni_device_data {
 	bool console;
 	enum geni_se_xfer_mode mode;
-	struct dev_pm_domain_attach_data pd_data;
-	int (*resources_init)(struct uart_port *uport);
-	int (*set_rate)(struct uart_port *uport, unsigned int baud);
-	int (*power_state)(struct uart_port *uport, bool state);
 };
 
 struct qcom_geni_private_data {
@@ -147,7 +140,6 @@ struct qcom_geni_serial_port {
 
 	struct qcom_geni_private_data private_data;
 	const struct qcom_geni_device_data *dev_data;
-	struct dev_pm_domain_list *pd_list;
 };
 
 static const struct uart_ops qcom_geni_console_pops;
@@ -1370,42 +1362,6 @@ static int geni_serial_set_rate(struct uart_port *uport, unsigned int baud)
 	return 0;
 }
 
-static int geni_serial_set_level(struct uart_port *uport, unsigned int baud)
-{
-	struct qcom_geni_serial_port *port = to_dev_port(uport);
-	struct device *perf_dev = port->pd_list->pd_devs[DOMAIN_IDX_PERF];
-
-	/*
-	 * The performance protocol sets UART communication
-	 * speeds by selecting different performance levels
-	 * through the OPP framework.
-	 *
-	 * Supported perf levels for baudrates in firmware are below
-	 * +---------------------+--------------------+
-	 * |  Perf level value   |  Baudrate values   |
-	 * +---------------------+--------------------+
-	 * |      300            |      300           |
-	 * |      1200           |      1200          |
-	 * |      2400           |      2400          |
-	 * |      4800           |      4800          |
-	 * |      9600           |      9600          |
-	 * |      19200          |      19200         |
-	 * |      38400          |      38400         |
-	 * |      57600          |      57600         |
-	 * |      115200         |      115200        |
-	 * |      230400         |      230400        |
-	 * |      460800         |      460800        |
-	 * |      921600         |      921600        |
-	 * |      2000000        |      2000000       |
-	 * |      3000000        |      3000000       |
-	 * |      3200000        |      3200000       |
-	 * |      4000000        |      4000000       |
-	 * +---------------------+--------------------+
-	 */
-
-	return dev_pm_opp_set_level(perf_dev, baud);
-}
-
 static void qcom_geni_serial_set_termios(struct uart_port *uport,
 					 struct ktermios *termios,
 					 const struct ktermios *old)
@@ -1424,7 +1380,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
 	/* baud rate */
 	baud = uart_get_baud_rate(uport, termios, old, 300, 8000000);
 
-	ret = port->dev_data->set_rate(uport, baud);
+	ret = geni_serial_set_rate(uport, baud);
 	if (ret)
 		return;
 
@@ -1711,27 +1667,8 @@ static int geni_serial_resources_off(struct uart_port *uport)
 	return 0;
 }
 
-static int geni_serial_resource_state(struct uart_port *uport, bool power_on)
-{
-	return power_on ? geni_serial_resources_on(uport) : geni_serial_resources_off(uport);
-}
-
-static int geni_serial_pwr_init(struct uart_port *uport)
-{
-	struct qcom_geni_serial_port *port = to_dev_port(uport);
-	int ret;
-
-	ret = dev_pm_domain_attach_list(port->se.dev,
-					&port->dev_data->pd_data, &port->pd_list);
-	if (ret <= 0)
-		return -EINVAL;
-
-	return 0;
-}
-
-static int geni_serial_resource_init(struct uart_port *uport)
+static int geni_serial_resource_init(struct qcom_geni_serial_port *port)
 {
-	struct qcom_geni_serial_port *port = to_dev_port(uport);
 	int ret;
 
 	port->se.clk = devm_clk_get(port->se.dev, "se");
@@ -1776,10 +1713,10 @@ static void qcom_geni_serial_pm(struct uart_port *uport,
 		old_state = UART_PM_STATE_OFF;
 
 	if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF)
-		pm_runtime_resume_and_get(uport->dev);
+		geni_serial_resources_on(uport);
 	else if (new_state == UART_PM_STATE_OFF &&
 		 old_state == UART_PM_STATE_ON)
-		pm_runtime_put_sync(uport->dev);
+		geni_serial_resources_off(uport);
 
 }
 
@@ -1882,16 +1819,13 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	port->se.dev = &pdev->dev;
 	port->se.wrapper = dev_get_drvdata(pdev->dev.parent);
 
-	ret = port->dev_data->resources_init(uport);
+	ret = geni_serial_resource_init(port);
 	if (ret)
 		return ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		ret = -EINVAL;
-		goto error;
-	}
-
+	if (!res)
+		return -EINVAL;
 	uport->mapbase = res->start;
 
 	uport->rs485_config = qcom_geni_rs485_config;
@@ -1903,26 +1837,19 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	if (!data->console) {
 		port->rx_buf = devm_kzalloc(uport->dev,
 					    DMA_RX_BUF_SIZE, GFP_KERNEL);
-		if (!port->rx_buf) {
-			ret = -ENOMEM;
-			goto error;
-		}
+		if (!port->rx_buf)
+			return -ENOMEM;
 	}
 
 	port->name = devm_kasprintf(uport->dev, GFP_KERNEL,
 			"qcom_geni_serial_%s%d",
 			uart_console(uport) ? "console" : "uart", uport->line);
-	if (!port->name) {
-		ret = -ENOMEM;
-		goto error;
-	}
+	if (!port->name)
+		return -ENOMEM;
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		ret = irq;
-		goto error;
-	}
-
+	if (irq < 0)
+		return irq;
 	uport->irq = irq;
 	uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);
 
@@ -1944,18 +1871,16 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 			IRQF_TRIGGER_HIGH, port->name, uport);
 	if (ret) {
 		dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
-		goto error;
+		return ret;
 	}
 
 	ret = uart_get_rs485_mode(uport);
 	if (ret)
 		return ret;
 
-	devm_pm_runtime_enable(port->se.dev);
-
 	ret = uart_add_one_port(drv, uport);
 	if (ret)
-		goto error;
+		return ret;
 
 	if (port->wakeup_irq > 0) {
 		device_init_wakeup(&pdev->dev, true);
@@ -1965,15 +1890,11 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 			device_init_wakeup(&pdev->dev, false);
 			ida_free(&port_ida, uport->line);
 			uart_remove_one_port(drv, uport);
-			goto error;
+			return ret;
 		}
 	}
 
 	return 0;
-
-error:
-	dev_pm_domain_detach_list(port->pd_list);
-	return ret;
 }
 
 static void qcom_geni_serial_remove(struct platform_device *pdev)
@@ -1986,31 +1907,6 @@ static void qcom_geni_serial_remove(struct platform_device *pdev)
 	device_init_wakeup(&pdev->dev, false);
 	ida_free(&port_ida, uport->line);
 	uart_remove_one_port(drv, &port->uport);
-	dev_pm_domain_detach_list(port->pd_list);
-}
-
-static int __maybe_unused qcom_geni_serial_runtime_suspend(struct device *dev)
-{
-	struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
-	struct uart_port *uport = &port->uport;
-	int ret = 0;
-
-	if (port->dev_data->power_state)
-		ret = port->dev_data->power_state(uport, false);
-
-	return ret;
-}
-
-static int __maybe_unused qcom_geni_serial_runtime_resume(struct device *dev)
-{
-	struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
-	struct uart_port *uport = &port->uport;
-	int ret = 0;
-
-	if (port->dev_data->power_state)
-		ret = port->dev_data->power_state(uport, true);
-
-	return ret;
 }
 
 static int qcom_geni_serial_suspend(struct device *dev)
@@ -2048,46 +1944,14 @@ static int qcom_geni_serial_resume(struct device *dev)
 static const struct qcom_geni_device_data qcom_geni_console_data = {
 	.console = true,
 	.mode = GENI_SE_FIFO,
-	.resources_init = geni_serial_resource_init,
-	.set_rate = geni_serial_set_rate,
-	.power_state = geni_serial_resource_state,
 };
 
 static const struct qcom_geni_device_data qcom_geni_uart_data = {
 	.console = false,
 	.mode = GENI_SE_DMA,
-	.resources_init = geni_serial_resource_init,
-	.set_rate = geni_serial_set_rate,
-	.power_state = geni_serial_resource_state,
-};
-
-static const struct qcom_geni_device_data sa8255p_qcom_geni_console_data = {
-	.console = true,
-	.mode = GENI_SE_FIFO,
-	.pd_data = {
-		.pd_flags = PD_FLAG_DEV_LINK_ON,
-		.pd_names = (const char*[]) { "power", "perf" },
-		.num_pd_names = 2,
-	},
-	.resources_init = geni_serial_pwr_init,
-	.set_rate = geni_serial_set_level,
-};
-
-static const struct qcom_geni_device_data sa8255p_qcom_geni_uart_data = {
-	.console = false,
-	.mode = GENI_SE_DMA,
-	.pd_data = {
-		.pd_flags = PD_FLAG_DEV_LINK_ON,
-		.pd_names = (const char*[]) { "power", "perf" },
-		.num_pd_names = 2,
-	},
-	.resources_init = geni_serial_pwr_init,
-	.set_rate = geni_serial_set_level,
 };
 
 static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
-	SET_RUNTIME_PM_OPS(qcom_geni_serial_runtime_suspend,
-			   qcom_geni_serial_runtime_resume, NULL)
 	SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_suspend, qcom_geni_serial_resume)
 };
 
@@ -2096,18 +1960,10 @@ static const struct of_device_id qcom_geni_serial_match_table[] = {
 		.compatible = "qcom,geni-debug-uart",
 		.data = &qcom_geni_console_data,
 	},
-	{
-		.compatible = "qcom,sa8255p-geni-debug-uart",
-		.data = &sa8255p_qcom_geni_console_data,
-	},
 	{
 		.compatible = "qcom,geni-uart",
 		.data = &qcom_geni_uart_data,
 	},
-	{
-		.compatible = "qcom,sa8255p-geni-uart",
-		.data = &sa8255p_qcom_geni_uart_data,
-	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, qcom_geni_serial_match_table);
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index fc869b7f803f..62e984d20e59 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2114,6 +2114,12 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE(0x1e0e, 0x9071),				/* Simcom SIM8230 RMNET mode */
+	  .driver_info = RSVD(3) | RSVD(4) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9078, 0xff),	/* Simcom SIM8230 ECM mode */
+	  .driver_info = RSVD(5) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x907b, 0xff),	/* Simcom SIM8230 RNDIS mode */
+	  .driver_info = RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 46be7560548c..b4b62ac46bc6 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3764,6 +3764,7 @@ void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname);
  * node.c
  */
 struct node_info;
+enum node_type;
 
 int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid);
 bool f2fs_available_free_memory(struct f2fs_sb_info *sbi, int type);
@@ -3786,7 +3787,8 @@ int f2fs_remove_inode_page(struct inode *inode);
 struct folio *f2fs_new_inode_folio(struct inode *inode);
 struct folio *f2fs_new_node_folio(struct dnode_of_data *dn, unsigned int ofs);
 void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
-struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid);
+struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid,
+						enum node_type node_type);
 struct folio *f2fs_get_inode_folio(struct f2fs_sb_info *sbi, pgoff_t ino);
 struct folio *f2fs_get_xnode_folio(struct f2fs_sb_info *sbi, pgoff_t xnid);
 int f2fs_move_node_folio(struct folio *node_folio, int gc_type);
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 098e9f71421e..c0f209f74688 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1071,7 +1071,7 @@ static int gc_node_segment(struct f2fs_sb_info *sbi,
 		}
 
 		/* phase == 2 */
-		node_folio = f2fs_get_node_folio(sbi, nid);
+		node_folio = f2fs_get_node_folio(sbi, nid, NODE_TYPE_REGULAR);
 		if (IS_ERR(node_folio))
 			continue;
 
@@ -1145,7 +1145,7 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
 	nid = le32_to_cpu(sum->nid);
 	ofs_in_node = le16_to_cpu(sum->ofs_in_node);
 
-	node_folio = f2fs_get_node_folio(sbi, nid);
+	node_folio = f2fs_get_node_folio(sbi, nid, NODE_TYPE_REGULAR);
 	if (IS_ERR(node_folio))
 		return false;
 
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 27743b93e186..92054dcbe20d 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -871,7 +871,8 @@ int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
 		}
 
 		if (!done) {
-			nfolio[i] = f2fs_get_node_folio(sbi, nids[i]);
+			nfolio[i] = f2fs_get_node_folio(sbi, nids[i],
+						NODE_TYPE_NON_INODE);
 			if (IS_ERR(nfolio[i])) {
 				err = PTR_ERR(nfolio[i]);
 				f2fs_folio_put(nfolio[0], false);
@@ -989,7 +990,7 @@ static int truncate_dnode(struct dnode_of_data *dn)
 		return 1;
 
 	/* get direct node */
-	folio = f2fs_get_node_folio(sbi, dn->nid);
+	folio = f2fs_get_node_folio(sbi, dn->nid, NODE_TYPE_NON_INODE);
 	if (PTR_ERR(folio) == -ENOENT)
 		return 1;
 	else if (IS_ERR(folio))
@@ -1033,7 +1034,8 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
 
 	trace_f2fs_truncate_nodes_enter(dn->inode, dn->nid, dn->data_blkaddr);
 
-	folio = f2fs_get_node_folio(F2FS_I_SB(dn->inode), dn->nid);
+	folio = f2fs_get_node_folio(F2FS_I_SB(dn->inode), dn->nid,
+						NODE_TYPE_NON_INODE);
 	if (IS_ERR(folio)) {
 		trace_f2fs_truncate_nodes_exit(dn->inode, PTR_ERR(folio));
 		return PTR_ERR(folio);
@@ -1111,7 +1113,8 @@ static int truncate_partial_nodes(struct dnode_of_data *dn,
 	/* get indirect nodes in the path */
 	for (i = 0; i < idx + 1; i++) {
 		/* reference count'll be increased */
-		folios[i] = f2fs_get_node_folio(F2FS_I_SB(dn->inode), nid[i]);
+		folios[i] = f2fs_get_node_folio(F2FS_I_SB(dn->inode), nid[i],
+							NODE_TYPE_NON_INODE);
 		if (IS_ERR(folios[i])) {
 			err = PTR_ERR(folios[i]);
 			idx = i - 1;
@@ -1496,21 +1499,37 @@ static int sanity_check_node_footer(struct f2fs_sb_info *sbi,
 					struct folio *folio, pgoff_t nid,
 					enum node_type ntype)
 {
-	if (unlikely(nid != nid_of_node(folio) ||
-		(ntype == NODE_TYPE_INODE && !IS_INODE(folio)) ||
-		(ntype == NODE_TYPE_XATTR &&
-		!f2fs_has_xattr_block(ofs_of_node(folio))) ||
-		time_to_inject(sbi, FAULT_INCONSISTENT_FOOTER))) {
-		f2fs_warn(sbi, "inconsistent node block, node_type:%d, nid:%lu, "
-			  "node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
-			  ntype, nid, nid_of_node(folio), ino_of_node(folio),
-			  ofs_of_node(folio), cpver_of_node(folio),
-			  next_blkaddr_of_node(folio));
-		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
-		return -EFSCORRUPTED;
+	if (unlikely(nid != nid_of_node(folio)))
+		goto out_err;
+
+	switch (ntype) {
+	case NODE_TYPE_INODE:
+		if (!IS_INODE(folio))
+			goto out_err;
+		break;
+	case NODE_TYPE_XATTR:
+		if (!f2fs_has_xattr_block(ofs_of_node(folio)))
+			goto out_err;
+		break;
+	case NODE_TYPE_NON_INODE:
+		if (IS_INODE(folio))
+			goto out_err;
+		break;
+	default:
+		break;
 	}
+	if (time_to_inject(sbi, FAULT_INCONSISTENT_FOOTER))
+		goto out_err;
 	return 0;
+out_err:
+	f2fs_warn(sbi, "inconsistent node block, node_type:%d, nid:%lu, "
+		  "node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
+		  ntype, nid, nid_of_node(folio), ino_of_node(folio),
+		  ofs_of_node(folio), cpver_of_node(folio),
+		  next_blkaddr_of_node(folio));
+	set_sbi_flag(sbi, SBI_NEED_FSCK);
+	f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
+	return -EFSCORRUPTED;
 }
 
 static struct folio *__get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid,
@@ -1567,9 +1586,10 @@ static struct folio *__get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid,
 	return ERR_PTR(err);
 }
 
-struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid)
+struct folio *f2fs_get_node_folio(struct f2fs_sb_info *sbi, pgoff_t nid,
+						enum node_type node_type)
 {
-	return __get_node_folio(sbi, nid, NULL, 0, NODE_TYPE_REGULAR);
+	return __get_node_folio(sbi, nid, NULL, 0, node_type);
 }
 
 struct folio *f2fs_get_inode_folio(struct f2fs_sb_info *sbi, pgoff_t ino)
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 030390543b54..9cb8dcf8d417 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -57,6 +57,7 @@ enum node_type {
 	NODE_TYPE_REGULAR,
 	NODE_TYPE_INODE,
 	NODE_TYPE_XATTR,
+	NODE_TYPE_NON_INODE,
 };
 
 /*
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 4cb3a91801b4..215e442db72c 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -548,7 +548,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
 	}
 
 	/* Get the node page */
-	node_folio = f2fs_get_node_folio(sbi, nid);
+	node_folio = f2fs_get_node_folio(sbi, nid, NODE_TYPE_REGULAR);
 	if (IS_ERR(node_folio))
 		return PTR_ERR(node_folio);
 
diff --git a/include/linux/device.h b/include/linux/device.h
index 0470d19da7f2..b031ff71a5bd 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -851,6 +851,9 @@ static inline bool device_pm_not_required(struct device *dev)
 static inline void device_set_pm_not_required(struct device *dev)
 {
 	dev->power.no_pm = true;
+#ifdef CONFIG_PM
+	dev->power.no_callbacks = true;
+#endif
 }
 
 static inline void dev_pm_syscore_device(struct device *dev, bool val)
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 43460949ad3f..1244d2c5c384 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -7273,7 +7273,7 @@ int ring_buffer_map(struct trace_buffer *buffer, int cpu,
 		atomic_dec(&cpu_buffer->resize_disabled);
 	}
 
-	return 0;
+	return err;
 }
 
 int ring_buffer_unmap(struct trace_buffer *buffer, int cpu)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 339ec4e54778..8992d8bebbdd 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -726,10 +726,10 @@ static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req)
 	p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req);
 
 	spin_lock(&m->req_lock);
-	/* Ignore cancelled request if message has been received
-	 * before lock.
-	 */
-	if (req->status == REQ_STATUS_RCVD) {
+	/* Ignore cancelled request if status changed since the request was
+	 * processed in p9_client_flush()
+	*/
+	if (req->status != REQ_STATUS_SENT) {
 		spin_unlock(&m->req_lock);
 		return 0;
 	}
diff --git a/rust/kernel/block/mq/gen_disk.rs b/rust/kernel/block/mq/gen_disk.rs
index cd54cd64ea88..e1af0fa302a3 100644
--- a/rust/kernel/block/mq/gen_disk.rs
+++ b/rust/kernel/block/mq/gen_disk.rs
@@ -3,7 +3,7 @@
 //! Generic disk abstraction.
 //!
 //! C header: [`include/linux/blkdev.h`](srctree/include/linux/blkdev.h)
-//! C header: [`include/linux/blk_mq.h`](srctree/include/linux/blk_mq.h)
+//! C header: [`include/linux/blk-mq.h`](srctree/include/linux/blk-mq.h)
 
 use crate::block::mq::{raw_writer::RawWriter, Operations, TagSet};
 use crate::{bindings, error::from_err_ptr, error::Result, sync::Arc};
diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs
index d29c477e89a8..f8f1db5eeb0f 100644
--- a/rust/kernel/drm/device.rs
+++ b/rust/kernel/drm/device.rs
@@ -2,7 +2,7 @@
 
 //! DRM device.
 //!
-//! C header: [`include/linux/drm/drm_device.h`](srctree/include/linux/drm/drm_device.h)
+//! C header: [`include/drm/drm_device.h`](srctree/include/drm/drm_device.h)
 
 use crate::{
     alloc::allocator::Kmalloc,
diff --git a/rust/kernel/drm/driver.rs b/rust/kernel/drm/driver.rs
index fe7e8d06961a..d2dad77274c4 100644
--- a/rust/kernel/drm/driver.rs
+++ b/rust/kernel/drm/driver.rs
@@ -2,7 +2,7 @@
 
 //! DRM driver core.
 //!
-//! C header: [`include/linux/drm/drm_drv.h`](srctree/include/linux/drm/drm_drv.h)
+//! C header: [`include/drm/drm_drv.h`](srctree/include/drm/drm_drv.h)
 
 use crate::{
     bindings, device, devres, drm,
diff --git a/rust/kernel/drm/file.rs b/rust/kernel/drm/file.rs
index e8789c9110d6..8c46f8d51951 100644
--- a/rust/kernel/drm/file.rs
+++ b/rust/kernel/drm/file.rs
@@ -2,7 +2,7 @@
 
 //! DRM File objects.
 //!
-//! C header: [`include/linux/drm/drm_file.h`](srctree/include/linux/drm/drm_file.h)
+//! C header: [`include/drm/drm_file.h`](srctree/include/drm/drm_file.h)
 
 use crate::{bindings, drm, error::Result, prelude::*, types::Opaque};
 use core::marker::PhantomData;
diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index b71821cfb5ea..b9f3248876ba 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -2,7 +2,7 @@
 
 //! DRM GEM API
 //!
-//! C header: [`include/linux/drm/drm_gem.h`](srctree/include/linux/drm/drm_gem.h)
+//! C header: [`include/drm/drm_gem.h`](srctree/include/drm/drm_gem.h)
 
 use crate::{
     alloc::flags::*,
diff --git a/rust/kernel/drm/ioctl.rs b/rust/kernel/drm/ioctl.rs
index fdec01c37168..8431cdcd3ae0 100644
--- a/rust/kernel/drm/ioctl.rs
+++ b/rust/kernel/drm/ioctl.rs
@@ -2,7 +2,7 @@
 
 //! DRM IOCTL definitions.
 //!
-//! C header: [`include/linux/drm/drm_ioctl.h`](srctree/include/linux/drm/drm_ioctl.h)
+//! C header: [`include/drm/drm_ioctl.h`](srctree/include/drm/drm_ioctl.h)
 
 use crate::ioctl;
 
diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index 887ee611b553..658e806a5da7 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -240,11 +240,11 @@ pub trait Driver: Send {
 
     /// PCI driver probe.
     ///
-    /// Called when a new platform device is added or discovered.
-    /// Implementers should attempt to initialize the device here.
+    /// Called when a new pci device is added or discovered. Implementers should
+    /// attempt to initialize the device here.
     fn probe(dev: &Device<device::Core>, id_info: &Self::IdInfo) -> Result<Pin<KBox<Self>>>;
 
-    /// Platform driver unbind.
+    /// PCI driver unbind.
     ///
     /// Called when a [`Device`] is unbound from its bound [`Driver`]. Implementing this callback
     /// is optional.

From - Fri Oct 17 14:26:21 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.17.2
Date: Sun, 12 Oct 2025 13:24:28 +0200
DKIMCheck: Server passes DKIM test, 0 Spam score
                             mail domains are different
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I'm announcing the release of the 6.17.2 kernel.

All users of the 6.17 kernel series must upgrade.

The updated 6.17.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.17.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                            |    2 
 arch/x86/kvm/emulate.c                              |    9 -
 arch/x86/kvm/kvm_emulate.h                          |    3 
 arch/x86/kvm/x86.c                                  |   15 -
 crypto/rng.c                                        |    8 
 crypto/testmgr.c                                    |    5 
 crypto/zstd.c                                       |    2 
 drivers/android/dbitmap.h                           |    1 
 drivers/base/faux.c                                 |    1 
 drivers/bluetooth/btusb.c                           |    2 
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c              |    6 
 drivers/gpu/drm/amd/amdgpu/mes_v12_0.c              |    5 
 drivers/gpu/drm/amd/include/mes_v11_api_def.h       |    3 
 drivers/gpu/drm/amd/include/mes_v12_api_def.h       |    3 
 drivers/misc/amd-sbi/Kconfig                        |    1 
 drivers/net/wireless/realtek/rtl8xxxu/core.c        |    2 
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c |    1 
 drivers/nvmem/layouts.c                             |   13 +
 drivers/staging/axis-fifo/axis-fifo.c               |   68 +++----
 drivers/tty/serial/Kconfig                          |    2 
 drivers/tty/serial/qcom_geni_serial.c               |  176 +-------------------
 drivers/usb/serial/option.c                         |    6 
 fs/f2fs/f2fs.h                                      |    4 
 fs/f2fs/gc.c                                        |    4 
 fs/f2fs/node.c                                      |   58 ++++--
 fs/f2fs/node.h                                      |    1 
 fs/f2fs/recovery.c                                  |    2 
 include/linux/device.h                              |    3 
 kernel/trace/ring_buffer.c                          |    2 
 net/9p/trans_fd.c                                   |    8 
 rust/kernel/block/mq/gen_disk.rs                    |    2 
 rust/kernel/drm/device.rs                           |    2 
 rust/kernel/drm/driver.rs                           |    2 
 rust/kernel/drm/file.rs                             |    2 
 rust/kernel/drm/gem/mod.rs                          |    2 
 rust/kernel/drm/ioctl.rs                            |    2 
 rust/kernel/pci.rs                                  |    6 
 37 files changed, 178 insertions(+), 256 deletions(-)

Ankit Khushwaha (1):
      ring buffer: Propagate __rb_map_vma return value to caller

Bitterblue Smith (2):
      wifi: rtlwifi: rtl8192cu: Don't claim USB ID 07b8:8188
      wifi: rtl8xxxu: Don't claim USB ID 07b8:8188

Carlos Llamas (1):
      binder: fix double-free in dbitmap

Chao Yu (1):
      f2fs: fix to do sanity check on node footer for non inode dnode

Greg Kroah-Hartman (1):
      Linux 6.17.2

Herbert Xu (3):
      Revert "crypto: testmgr - desupport SHA-1 for FIPS 140"
      crypto: zstd - Fix compression bug caused by truncation
      crypto: rng - Ensure set_ent is always present

Krzysztof Kozlowski (1):
      serial: qcom-geni: Fix blocked task

Mario Limonciello (1):
      drm/amdgpu: Enable MES lr_compute_wa by default

Max Kellermann (1):
      drivers/misc/amd-sbi/Kconfig: select REGMAP_I2C

Michael Walle (1):
      nvmem: layouts: fix automatic module loading

Miguel Ojeda (2):
      rust: drm: fix `srctree/` links
      rust: block: fix `srctree/` links

Nalivayko Sergey (1):
      net/9p: fix double req put in p9_fd_cancelled

Ovidiu Panait (3):
      staging: axis-fifo: fix maximum TX packet length check
      staging: axis-fifo: fix TX handling on copy_from_user() failure
      staging: axis-fifo: flush RX FIFO on read errors

Rafael J. Wysocki (2):
      driver core: faux: Set power.no_pm for faux devices
      driver core/PM: Set power.no_callbacks along with power.no_pm

Rahul Rameshbabu (2):
      rust: pci: fix incorrect platform reference in PCI driver probe doc comment
      rust: pci: fix incorrect platform reference in PCI driver unbind doc comment

Raphael Gallais-Pou (1):
      serial: stm32: allow selecting console when the driver is module

Sean Christopherson (1):
      KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

Xiaowei Li (1):
      USB: serial: option: add SIMCom 8230C compositions

Zenm Chen (1):
      Bluetooth: btusb: Add USB ID 2001:332a for D-Link AX9U rev. A1

From - Fri Oct 17 14:26:21 2025
Delivery-date: Sun, 12 Oct 2025 11:25:24 +0000
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Re: Linux 6.16.12
Date: Sun, 12 Oct 2025 13:24:22 +0200
DKIMCheck: Server passes DKIM test, 0 Spam score
                             blocked.  See
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                             [URIs: linuxfoundation.org]
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                             author's domain
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
 -0.0 DKIMWL_WL_HIGH         DKIMwl.org - High trust sender
SpamTally: Final spam score: 4

diff --git a/Makefile b/Makefile
index 0d1e19ef28b9..d4677e7a7161 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 16
-SUBLEVEL = 11
+SUBLEVEL = 12
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1349e278cd2a..542d3664afa3 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5107,12 +5107,11 @@ void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 	ctxt->mem_read.end = 0;
 }
 
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts)
 {
 	const struct x86_emulate_ops *ops = ctxt->ops;
 	int rc = X86EMUL_CONTINUE;
 	int saved_dst_type = ctxt->dst.type;
-	bool is_guest_mode = ctxt->ops->is_guest_mode(ctxt);
 
 	ctxt->mem_read.pos = 0;
 
@@ -5160,7 +5159,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(&ctxt->dst);
 		}
 
-		if (unlikely(is_guest_mode) && ctxt->intercept) {
+		if (unlikely(check_intercepts) && ctxt->intercept) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5189,7 +5188,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				goto done;
 		}
 
-		if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+		if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5243,7 +5242,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+	if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index c1df5acfacaf..7b5ddb787a25 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -235,7 +235,6 @@ struct x86_emulate_ops {
 	void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked);
 
 	bool (*is_smm)(struct x86_emulate_ctxt *ctxt);
-	bool (*is_guest_mode)(struct x86_emulate_ctxt *ctxt);
 	int (*leave_smm)(struct x86_emulate_ctxt *ctxt);
 	void (*triple_fault)(struct x86_emulate_ctxt *ctxt);
 	int (*set_xcr)(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr);
@@ -521,7 +520,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt);
 #define EMULATION_RESTART 1
 #define EMULATION_INTERCEPTED 2
 void init_decode_cache(struct x86_emulate_ctxt *ctxt);
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts);
 int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
 			 u16 tss_selector, int idt_index, int reason,
 			 bool has_error_code, u32 error_code);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6b3a64e73f21..689a06acd00f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8613,11 +8613,6 @@ static bool emulator_is_smm(struct x86_emulate_ctxt *ctxt)
 	return is_smm(emul_to_vcpu(ctxt));
 }
 
-static bool emulator_is_guest_mode(struct x86_emulate_ctxt *ctxt)
-{
-	return is_guest_mode(emul_to_vcpu(ctxt));
-}
-
 #ifndef CONFIG_KVM_SMM
 static int emulator_leave_smm(struct x86_emulate_ctxt *ctxt)
 {
@@ -8701,7 +8696,6 @@ static const struct x86_emulate_ops emulate_ops = {
 	.guest_cpuid_is_intel_compatible = emulator_guest_cpuid_is_intel_compatible,
 	.set_nmi_mask        = emulator_set_nmi_mask,
 	.is_smm              = emulator_is_smm,
-	.is_guest_mode       = emulator_is_guest_mode,
 	.leave_smm           = emulator_leave_smm,
 	.triple_fault        = emulator_triple_fault,
 	.set_xcr             = emulator_set_xcr,
@@ -9286,7 +9280,14 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		ctxt->exception.address = 0;
 	}
 
-	r = x86_emulate_insn(ctxt);
+	/*
+	 * Check L1's instruction intercepts when emulating instructions for
+	 * L2, unless KVM is re-emulating a previously decoded instruction,
+	 * e.g. to complete userspace I/O, in which case KVM has already
+	 * checked the intercepts.
+	 */
+	r = x86_emulate_insn(ctxt, is_guest_mode(vcpu) &&
+				   !(emulation_type & EMULTYPE_NO_DECODE));
 
 	if (r == EMULATION_INTERCEPTED)
 		return 1;
diff --git a/crypto/rng.c b/crypto/rng.c
index b8ae6ebc091d..ee1768c5a400 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -168,6 +168,11 @@ int crypto_del_default_rng(void)
 EXPORT_SYMBOL_GPL(crypto_del_default_rng);
 #endif
 
+static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data,
+				unsigned int len)
+{
+}
+
 int crypto_register_rng(struct rng_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
@@ -179,6 +184,9 @@ int crypto_register_rng(struct rng_alg *alg)
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_RNG;
 
+	if (!alg->set_ent)
+		alg->set_ent = rng_default_set_ent;
+
 	return crypto_register_alg(base);
 }
 EXPORT_SYMBOL_GPL(crypto_register_rng);
diff --git a/drivers/android/dbitmap.h b/drivers/android/dbitmap.h
index 956f1bd087d1..c7299ce8b374 100644
--- a/drivers/android/dbitmap.h
+++ b/drivers/android/dbitmap.h
@@ -37,6 +37,7 @@ static inline void dbitmap_free(struct dbitmap *dmap)
 {
 	dmap->nbits = 0;
 	kfree(dmap->map);
+	dmap->map = NULL;
 }
 
 /* Returns the nbits that a dbitmap can shrink to, 0 if not possible. */
diff --git a/drivers/base/faux.c b/drivers/base/faux.c
index f5fbda0a9a44..21dd02124231 100644
--- a/drivers/base/faux.c
+++ b/drivers/base/faux.c
@@ -155,6 +155,7 @@ struct faux_device *faux_device_create_with_groups(const char *name,
 		dev->parent = &faux_bus_root;
 	dev->bus = &faux_bus_type;
 	dev_set_name(dev, "%s", name);
+	device_set_pm_not_required(dev);
 
 	ret = device_add(dev);
 	if (ret) {
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 9efdd111baf5..e49f491f0fa7 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -520,6 +520,8 @@ static const struct usb_device_id quirks_table[] = {
 	/* Realtek 8851BU Bluetooth devices */
 	{ USB_DEVICE(0x3625, 0x010b), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x2001, 0x332a), .driver_info = BTUSB_REALTEK |
+						     BTUSB_WIDEBAND_SPEECH },
 
 	/* Realtek 8852AE Bluetooth devices */
 	{ USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
diff --git a/drivers/gpio/gpiolib-acpi-quirks.c b/drivers/gpio/gpiolib-acpi-quirks.c
index bfb04e67c4bc..7b95d1b03361 100644
--- a/drivers/gpio/gpiolib-acpi-quirks.c
+++ b/drivers/gpio/gpiolib-acpi-quirks.c
@@ -317,6 +317,18 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
 			.ignore_wake = "PNP0C50:00@8",
 		},
 	},
+	{
+		/*
+		 * Same as G1619-04. New model.
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "GPD"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "G1619-05"),
+		},
+		.driver_data = &(struct acpi_gpiolib_dmi_quirk) {
+			.ignore_wake = "PNP0C50:00@8",
+		},
+	},
 	{
 		/*
 		 * Spurious wakeups from GPIO 11
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 96566870f079..199bd9340b3b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -1654,6 +1654,21 @@ static int gfx_v11_0_sw_init(struct amdgpu_ip_block *ip_block)
 			}
 		}
 		break;
+	case IP_VERSION(11, 0, 1):
+	case IP_VERSION(11, 0, 4):
+		adev->gfx.cleaner_shader_ptr = gfx_11_0_3_cleaner_shader_hex;
+		adev->gfx.cleaner_shader_size = sizeof(gfx_11_0_3_cleaner_shader_hex);
+		if (adev->gfx.pfp_fw_version >= 102 &&
+		    adev->gfx.mec_fw_version >= 66 &&
+		    adev->mes.fw_version[0] >= 128) {
+			adev->gfx.enable_cleaner_shader = true;
+			r = amdgpu_gfx_cleaner_shader_sw_init(adev, adev->gfx.cleaner_shader_size);
+			if (r) {
+				adev->gfx.enable_cleaner_shader = false;
+				dev_err(adev->dev, "Failed to initialize cleaner shader\n");
+			}
+		}
+		break;
 	case IP_VERSION(11, 5, 0):
 	case IP_VERSION(11, 5, 1):
 		adev->gfx.cleaner_shader_ptr = gfx_11_0_3_cleaner_shader_hex;
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 3f6a828cad8a..1445da1f53af 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -711,6 +711,12 @@ static int mes_v11_0_set_hw_resources(struct amdgpu_mes *mes)
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
 	mes_set_hw_res_pkt.oversubscription_timer = 50;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x7f)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(mes->adev->dev,
+			      "MES FW version must be >= 0x7f to enable LR compute workaround.\n");
+
 	if (amdgpu_mes_log_enable) {
 		mes_set_hw_res_pkt.enable_mes_event_int_logging = 1;
 		mes_set_hw_res_pkt.event_intr_history_gpu_mc_ptr =
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index 6b222630f3fa..39caac14d5fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -738,6 +738,11 @@ static int mes_v12_0_set_hw_resources(struct amdgpu_mes *mes, int pipe)
 	mes_set_hw_res_pkt.use_different_vmid_compute = 1;
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x82)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(adev->dev,
+			      "MES FW version must be >= 0x82 to enable LR compute workaround.\n");
 
 	/*
 	 * Keep oversubscribe timer for sdma . When we have unmapped doorbell
diff --git a/drivers/gpu/drm/amd/include/mes_v11_api_def.h b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
index 15680c3f4970..ab1cfc92dbeb 100644
--- a/drivers/gpu/drm/amd/include/mes_v11_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
@@ -238,7 +238,8 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t enable_mes_sch_stb_log : 1;
 				uint32_t limit_single_process : 1;
 				uint32_t is_strix_tmz_wa_enabled  :1;
-				uint32_t reserved : 13;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 12;
 			};
 			uint32_t	uint32_t_all;
 		};
diff --git a/drivers/gpu/drm/amd/include/mes_v12_api_def.h b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
index d85ffab2aff9..a402974939d6 100644
--- a/drivers/gpu/drm/amd/include/mes_v12_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
@@ -286,7 +286,8 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t limit_single_process : 1;
 				uint32_t unmapped_doorbell_handling: 2;
 				uint32_t enable_mes_fence_int: 1;
-				uint32_t reserved : 10;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 9;
 			};
 			uint32_t uint32_all;
 		};
diff --git a/drivers/hid/hid-mcp2221.c b/drivers/hid/hid-mcp2221.c
index 6c0ac14f11a6..2cfc8e1a2912 100644
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -816,6 +816,10 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 			}
 			if (data[2] == MCP2221_I2C_READ_COMPL ||
 			    data[2] == MCP2221_I2C_READ_PARTIAL) {
+				if (!mcp->rxbuf || mcp->rxbuf_idx < 0 || data[3] > 60) {
+					mcp->status = -EINVAL;
+					break;
+				}
 				buf = mcp->rxbuf;
 				memcpy(&buf[mcp->rxbuf_idx], &data[4], data[3]);
 				mcp->rxbuf_idx = mcp->rxbuf_idx + data[3];
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 86244403b532..674f9f244f7b 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -661,6 +661,8 @@ iommufd_hw_pagetable_detach(struct iommufd_device *idev, ioasid_t pasid)
 		iopt_remove_reserved_iova(&hwpt_paging->ioas->iopt, idev->dev);
 	mutex_unlock(&igroup->lock);
 
+	iommufd_hw_pagetable_put(idev->ictx, hwpt);
+
 	/* Caller must destroy hwpt */
 	return hwpt;
 }
@@ -1007,7 +1009,6 @@ void iommufd_device_detach(struct iommufd_device *idev, ioasid_t pasid)
 	hwpt = iommufd_hw_pagetable_detach(idev, pasid);
 	if (!hwpt)
 		return;
-	iommufd_hw_pagetable_put(idev->ictx, hwpt);
 	refcount_dec(&idev->obj.users);
 }
 EXPORT_SYMBOL_NS_GPL(iommufd_device_detach, "IOMMUFD");
diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h
index 9ccc83341f32..e68d8d63076a 100644
--- a/drivers/iommu/iommufd/iommufd_private.h
+++ b/drivers/iommu/iommufd/iommufd_private.h
@@ -390,9 +390,8 @@ static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx,
 	if (hwpt->obj.type == IOMMUFD_OBJ_HWPT_PAGING) {
 		struct iommufd_hwpt_paging *hwpt_paging = to_hwpt_paging(hwpt);
 
-		lockdep_assert_not_held(&hwpt_paging->ioas->mutex);
-
 		if (hwpt_paging->auto_domain) {
+			lockdep_assert_not_held(&hwpt_paging->ioas->mutex);
 			iommufd_object_put_and_try_destroy(ictx, &hwpt->obj);
 			return;
 		}
diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c
index 62a3469bbd37..2b26747ac202 100644
--- a/drivers/iommu/iommufd/main.c
+++ b/drivers/iommu/iommufd/main.c
@@ -62,6 +62,10 @@ void iommufd_object_abort(struct iommufd_ctx *ictx, struct iommufd_object *obj)
 	old = xas_store(&xas, NULL);
 	xa_unlock(&ictx->objects);
 	WARN_ON(old != XA_ZERO_ENTRY);
+
+	if (WARN_ON(!refcount_dec_and_test(&obj->users)))
+		return;
+
 	kfree(obj);
 }
 
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 4395657fa583..7b1d8f0c62fd 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -133,7 +133,7 @@ struct journal_sector {
 	commit_id_t commit_id;
 };
 
-#define MAX_TAG_SIZE			(JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
+#define MAX_TAG_SIZE			255
 
 #define METADATA_PADDING_SECTORS	8
 
diff --git a/drivers/misc/amd-sbi/Kconfig b/drivers/misc/amd-sbi/Kconfig
index 4840831c84ca..4aae0733d0fc 100644
--- a/drivers/misc/amd-sbi/Kconfig
+++ b/drivers/misc/amd-sbi/Kconfig
@@ -2,6 +2,7 @@
 config AMD_SBRMI_I2C
 	tristate "AMD side band RMI support"
 	depends on I2C
+	select REGMAP_I2C
 	help
 	  Side band RMI over I2C support for AMD out of band management.
 
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 7f10213738e5..e2ae8d6a9de6 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -870,9 +870,6 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 	/* Reset Global error flags */
 	rcar_canfd_write(gpriv->base, RCANFD_GERFL, 0x0);
 
-	/* Set the controller into appropriate mode */
-	rcar_canfd_set_mode(gpriv);
-
 	/* Transition all Channels to reset mode */
 	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_clear_bit(gpriv->base,
@@ -892,6 +889,10 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 			return err;
 		}
 	}
+
+	/* Set the controller into appropriate mode */
+	rcar_canfd_set_mode(gpriv);
+
 	return 0;
 }
 
diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index 6441ff3b4198..963ea8510dd9 100644
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -545,8 +545,6 @@ static int hi3110_stop(struct net_device *net)
 
 	priv->force_quit = 1;
 	free_irq(spi->irq, priv);
-	destroy_workqueue(priv->wq);
-	priv->wq = NULL;
 
 	mutex_lock(&priv->hi3110_lock);
 
@@ -770,34 +768,23 @@ static int hi3110_open(struct net_device *net)
 		goto out_close;
 	}
 
-	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
-				   0);
-	if (!priv->wq) {
-		ret = -ENOMEM;
-		goto out_free_irq;
-	}
-	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
-	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
-
 	ret = hi3110_hw_reset(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_setup(net);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_set_normal_mode(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	netif_wake_queue(net);
 	mutex_unlock(&priv->hi3110_lock);
 
 	return 0;
 
- out_free_wq:
-	destroy_workqueue(priv->wq);
  out_free_irq:
 	free_irq(spi->irq, priv);
 	hi3110_hw_sleep(spi);
@@ -909,6 +896,15 @@ static int hi3110_can_probe(struct spi_device *spi)
 	if (ret)
 		goto out_clk;
 
+	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
+				   0);
+	if (!priv->wq) {
+		ret = -ENOMEM;
+		goto out_clk;
+	}
+	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
+	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
+
 	priv->spi = spi;
 	mutex_init(&priv->hi3110_lock);
 
@@ -944,6 +940,8 @@ static int hi3110_can_probe(struct spi_device *spi)
 	return 0;
 
  error_probe:
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
 	hi3110_power_enable(priv->power, 0);
 
  out_clk:
@@ -964,6 +962,9 @@ static void hi3110_can_remove(struct spi_device *spi)
 
 	hi3110_power_enable(priv->power, 0);
 
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
+
 	clk_disable_unprepare(priv->clk);
 
 	free_candev(net);
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index c6f69d87c38d..d07f0f75d23f 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -8170,8 +8170,6 @@ static const struct usb_device_id dev_table[] = {
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x06f8, 0xe033, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
-{USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8188, 0xff, 0xff, 0xff),
-	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8189, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9041, 0xff, 0xff, 0xff),
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
index c9b9e2bc90cc..1d75d8ec0016 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
@@ -291,7 +291,6 @@ static const struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x050d, 0x1102, rtl92cu_hal_cfg)}, /*Belkin - Edimax*/
 	{RTL_USB_DEVICE(0x050d, 0x11f2, rtl92cu_hal_cfg)}, /*Belkin - ISY*/
 	{RTL_USB_DEVICE(0x06f8, 0xe033, rtl92cu_hal_cfg)}, /*Hercules - Edimax*/
-	{RTL_USB_DEVICE(0x07b8, 0x8188, rtl92cu_hal_cfg)}, /*Abocom - Abocom*/
 	{RTL_USB_DEVICE(0x07b8, 0x8189, rtl92cu_hal_cfg)}, /*Funai - Abocom*/
 	{RTL_USB_DEVICE(0x0846, 0x9041, rtl92cu_hal_cfg)}, /*NetGear WNA1000M*/
 	{RTL_USB_DEVICE(0x0846, 0x9043, rtl92cu_hal_cfg)}, /*NG WNA1000Mv2*/
diff --git a/drivers/net/wireless/realtek/rtw89/chan.c b/drivers/net/wireless/realtek/rtw89/chan.c
index b18019b53181..17daf93fec0a 100644
--- a/drivers/net/wireless/realtek/rtw89/chan.c
+++ b/drivers/net/wireless/realtek/rtw89/chan.c
@@ -1595,6 +1595,35 @@ static bool rtw89_mcc_duration_decision_on_bt(struct rtw89_dev *rtwdev)
 	return false;
 }
 
+void rtw89_mcc_prepare_done_work(struct wiphy *wiphy, struct wiphy_work *work)
+{
+	struct rtw89_dev *rtwdev = container_of(work, struct rtw89_dev,
+						mcc_prepare_done_work.work);
+
+	lockdep_assert_wiphy(wiphy);
+
+	ieee80211_wake_queues(rtwdev->hw);
+}
+
+static void rtw89_mcc_prepare(struct rtw89_dev *rtwdev, bool start)
+{
+	struct rtw89_mcc_info *mcc = &rtwdev->mcc;
+	struct rtw89_mcc_config *config = &mcc->config;
+
+	if (start) {
+		ieee80211_stop_queues(rtwdev->hw);
+
+		wiphy_delayed_work_queue(rtwdev->hw->wiphy,
+					 &rtwdev->mcc_prepare_done_work,
+					 usecs_to_jiffies(config->prepare_delay));
+	} else {
+		wiphy_delayed_work_queue(rtwdev->hw->wiphy,
+					 &rtwdev->mcc_prepare_done_work, 0);
+		wiphy_delayed_work_flush(rtwdev->hw->wiphy,
+					 &rtwdev->mcc_prepare_done_work);
+	}
+}
+
 static int rtw89_mcc_fill_start_tsf(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_mcc_info *mcc = &rtwdev->mcc;
@@ -1630,6 +1659,8 @@ static int rtw89_mcc_fill_start_tsf(struct rtw89_dev *rtwdev)
 
 	config->start_tsf = start_tsf;
 	config->start_tsf_in_aux_domain = tsf_aux + start_tsf - tsf;
+	config->prepare_delay = start_tsf - tsf;
+
 	return 0;
 }
 
@@ -2219,6 +2250,8 @@ static int rtw89_mcc_start(struct rtw89_dev *rtwdev)
 	rtw89_chanctx_notify(rtwdev, RTW89_CHANCTX_STATE_MCC_START);
 
 	rtw89_mcc_start_beacon_noa(rtwdev);
+
+	rtw89_mcc_prepare(rtwdev, true);
 	return 0;
 }
 
@@ -2307,6 +2340,8 @@ static void rtw89_mcc_stop(struct rtw89_dev *rtwdev,
 	rtw89_chanctx_notify(rtwdev, RTW89_CHANCTX_STATE_MCC_STOP);
 
 	rtw89_mcc_stop_beacon_noa(rtwdev);
+
+	rtw89_mcc_prepare(rtwdev, false);
 }
 
 static int rtw89_mcc_update(struct rtw89_dev *rtwdev)
diff --git a/drivers/net/wireless/realtek/rtw89/chan.h b/drivers/net/wireless/realtek/rtw89/chan.h
index 2a25563593af..be998fdd8724 100644
--- a/drivers/net/wireless/realtek/rtw89/chan.h
+++ b/drivers/net/wireless/realtek/rtw89/chan.h
@@ -129,6 +129,8 @@ const struct rtw89_chan *__rtw89_mgnt_chan_get(struct rtw89_dev *rtwdev,
 #define rtw89_mgnt_chan_get(rtwdev, link_index) \
 	__rtw89_mgnt_chan_get(rtwdev, __func__, link_index)
 
+void rtw89_mcc_prepare_done_work(struct wiphy *wiphy, struct wiphy_work *work);
+
 int rtw89_chanctx_ops_add(struct rtw89_dev *rtwdev,
 			  struct ieee80211_chanctx_conf *ctx);
 void rtw89_chanctx_ops_remove(struct rtw89_dev *rtwdev,
diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index 894ab7ab94cc..b506afaaa3ec 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -1050,6 +1050,14 @@ rtw89_core_tx_update_desc_info(struct rtw89_dev *rtwdev,
 	}
 }
 
+static void rtw89_tx_wait_work(struct wiphy *wiphy, struct wiphy_work *work)
+{
+	struct rtw89_dev *rtwdev = container_of(work, struct rtw89_dev,
+						tx_wait_work.work);
+
+	rtw89_tx_wait_list_clear(rtwdev);
+}
+
 void rtw89_core_tx_kick_off(struct rtw89_dev *rtwdev, u8 qsel)
 {
 	u8 ch_dma;
@@ -1067,6 +1075,8 @@ int rtw89_core_tx_kick_off_and_wait(struct rtw89_dev *rtwdev, struct sk_buff *sk
 	unsigned long time_left;
 	int ret = 0;
 
+	lockdep_assert_wiphy(rtwdev->hw->wiphy);
+
 	wait = kzalloc(sizeof(*wait), GFP_KERNEL);
 	if (!wait) {
 		rtw89_core_tx_kick_off(rtwdev, qsel);
@@ -1074,18 +1084,23 @@ int rtw89_core_tx_kick_off_and_wait(struct rtw89_dev *rtwdev, struct sk_buff *sk
 	}
 
 	init_completion(&wait->completion);
+	wait->skb = skb;
 	rcu_assign_pointer(skb_data->wait, wait);
 
 	rtw89_core_tx_kick_off(rtwdev, qsel);
 	time_left = wait_for_completion_timeout(&wait->completion,
 						msecs_to_jiffies(timeout));
-	if (time_left == 0)
-		ret = -ETIMEDOUT;
-	else if (!wait->tx_done)
-		ret = -EAGAIN;
 
-	rcu_assign_pointer(skb_data->wait, NULL);
-	kfree_rcu(wait, rcu_head);
+	if (time_left == 0) {
+		ret = -ETIMEDOUT;
+		list_add_tail(&wait->list, &rtwdev->tx_waits);
+		wiphy_delayed_work_queue(rtwdev->hw->wiphy, &rtwdev->tx_wait_work,
+					 RTW89_TX_WAIT_WORK_TIMEOUT);
+	} else {
+		if (!wait->tx_done)
+			ret = -EAGAIN;
+		rtw89_tx_wait_release(wait);
+	}
 
 	return ret;
 }
@@ -4810,12 +4825,14 @@ void rtw89_core_stop(struct rtw89_dev *rtwdev)
 	wiphy_work_cancel(wiphy, &btc->dhcp_notify_work);
 	wiphy_work_cancel(wiphy, &btc->icmp_notify_work);
 	cancel_delayed_work_sync(&rtwdev->txq_reinvoke_work);
+	wiphy_delayed_work_cancel(wiphy, &rtwdev->tx_wait_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->track_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->chanctx_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->coex_act1_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->coex_bt_devinfo_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->coex_rfk_chk_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->cfo_track_work);
+	wiphy_delayed_work_cancel(wiphy, &rtwdev->mcc_prepare_done_work);
 	cancel_delayed_work_sync(&rtwdev->forbid_ba_work);
 	wiphy_delayed_work_cancel(wiphy, &rtwdev->antdiv_work);
 
@@ -5033,6 +5050,7 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 		INIT_LIST_HEAD(&rtwdev->scan_info.pkt_list[band]);
 	}
 	INIT_LIST_HEAD(&rtwdev->scan_info.chan_list);
+	INIT_LIST_HEAD(&rtwdev->tx_waits);
 	INIT_WORK(&rtwdev->ba_work, rtw89_core_ba_work);
 	INIT_WORK(&rtwdev->txq_work, rtw89_core_txq_work);
 	INIT_DELAYED_WORK(&rtwdev->txq_reinvoke_work, rtw89_core_txq_reinvoke_work);
@@ -5042,6 +5060,8 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 	wiphy_delayed_work_init(&rtwdev->coex_bt_devinfo_work, rtw89_coex_bt_devinfo_work);
 	wiphy_delayed_work_init(&rtwdev->coex_rfk_chk_work, rtw89_coex_rfk_chk_work);
 	wiphy_delayed_work_init(&rtwdev->cfo_track_work, rtw89_phy_cfo_track_work);
+	wiphy_delayed_work_init(&rtwdev->mcc_prepare_done_work, rtw89_mcc_prepare_done_work);
+	wiphy_delayed_work_init(&rtwdev->tx_wait_work, rtw89_tx_wait_work);
 	INIT_DELAYED_WORK(&rtwdev->forbid_ba_work, rtw89_forbid_ba_work);
 	wiphy_delayed_work_init(&rtwdev->antdiv_work, rtw89_phy_antdiv_work);
 	rtwdev->txq_wq = alloc_workqueue("rtw89_tx_wq", WQ_UNBOUND | WQ_HIGHPRI, 0);
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 1c8f3b9b7c4c..e2e90eab15ce 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -3429,9 +3429,12 @@ struct rtw89_phy_rate_pattern {
 	bool enable;
 };
 
+#define RTW89_TX_WAIT_WORK_TIMEOUT msecs_to_jiffies(500)
 struct rtw89_tx_wait_info {
 	struct rcu_head rcu_head;
+	struct list_head list;
 	struct completion completion;
+	struct sk_buff *skb;
 	bool tx_done;
 };
 
@@ -5728,6 +5731,7 @@ struct rtw89_mcc_config {
 	struct rtw89_mcc_sync sync;
 	u64 start_tsf;
 	u64 start_tsf_in_aux_domain;
+	u64 prepare_delay;
 	u16 mcc_interval; /* TU */
 	u16 beacon_offset; /* TU */
 };
@@ -5801,6 +5805,9 @@ struct rtw89_dev {
 	/* used to protect rpwm */
 	spinlock_t rpwm_lock;
 
+	struct list_head tx_waits;
+	struct wiphy_delayed_work tx_wait_work;
+
 	struct rtw89_cam_info cam_info;
 
 	struct sk_buff_head c2h_queue;
@@ -5858,6 +5865,7 @@ struct rtw89_dev {
 	struct wiphy_delayed_work coex_bt_devinfo_work;
 	struct wiphy_delayed_work coex_rfk_chk_work;
 	struct wiphy_delayed_work cfo_track_work;
+	struct wiphy_delayed_work mcc_prepare_done_work;
 	struct delayed_work forbid_ba_work;
 	struct wiphy_delayed_work antdiv_work;
 	struct rtw89_ppdu_sts_info ppdu_sts;
@@ -6054,6 +6062,26 @@ rtw89_assoc_link_rcu_dereference(struct rtw89_dev *rtwdev, u8 macid)
 	list_first_entry_or_null(&p->dlink_pool, typeof(*p->links_inst), dlink_schd); \
 })
 
+static inline void rtw89_tx_wait_release(struct rtw89_tx_wait_info *wait)
+{
+	dev_kfree_skb_any(wait->skb);
+	kfree_rcu(wait, rcu_head);
+}
+
+static inline void rtw89_tx_wait_list_clear(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_tx_wait_info *wait, *tmp;
+
+	lockdep_assert_wiphy(rtwdev->hw->wiphy);
+
+	list_for_each_entry_safe(wait, tmp, &rtwdev->tx_waits, list) {
+		if (!completion_done(&wait->completion))
+			continue;
+		list_del(&wait->list);
+		rtw89_tx_wait_release(wait);
+	}
+}
+
 static inline int rtw89_hci_tx_write(struct rtw89_dev *rtwdev,
 				     struct rtw89_core_tx_request *tx_req)
 {
@@ -6063,6 +6091,7 @@ static inline int rtw89_hci_tx_write(struct rtw89_dev *rtwdev,
 static inline void rtw89_hci_reset(struct rtw89_dev *rtwdev)
 {
 	rtwdev->hci.ops->reset(rtwdev);
+	rtw89_tx_wait_list_clear(rtwdev);
 }
 
 static inline int rtw89_hci_start(struct rtw89_dev *rtwdev)
@@ -7120,11 +7149,12 @@ static inline struct sk_buff *rtw89_alloc_skb_for_rx(struct rtw89_dev *rtwdev,
 	return dev_alloc_skb(length);
 }
 
-static inline void rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
+static inline bool rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
 					       struct rtw89_tx_skb_data *skb_data,
 					       bool tx_done)
 {
 	struct rtw89_tx_wait_info *wait;
+	bool ret = false;
 
 	rcu_read_lock();
 
@@ -7132,11 +7162,14 @@ static inline void rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
 	if (!wait)
 		goto out;
 
+	ret = true;
 	wait->tx_done = tx_done;
-	complete(&wait->completion);
+	/* Don't access skb anymore after completion */
+	complete_all(&wait->completion);
 
 out:
 	rcu_read_unlock();
+	return ret;
 }
 
 static inline bool rtw89_is_mlo_1_1(struct rtw89_dev *rtwdev)
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index 064f6a940107..8eeb1a4498cd 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -464,7 +464,8 @@ static void rtw89_pci_tx_status(struct rtw89_dev *rtwdev,
 	struct rtw89_tx_skb_data *skb_data = RTW89_TX_SKB_CB(skb);
 	struct ieee80211_tx_info *info;
 
-	rtw89_core_tx_wait_complete(rtwdev, skb_data, tx_status == RTW89_TX_DONE);
+	if (rtw89_core_tx_wait_complete(rtwdev, skb_data, tx_status == RTW89_TX_DONE))
+		return;
 
 	info = IEEE80211_SKB_CB(skb);
 	ieee80211_tx_info_clear_status(info);
diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
index 811c91481441..869ab22a7968 100644
--- a/drivers/net/wireless/realtek/rtw89/ser.c
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -501,7 +501,9 @@ static void ser_reset_trx_st_hdl(struct rtw89_ser *ser, u8 evt)
 		}
 
 		drv_stop_rx(ser);
+		wiphy_lock(wiphy);
 		drv_trx_reset(ser);
+		wiphy_unlock(wiphy);
 
 		/* wait m3 */
 		hal_send_m2_event(ser);
diff --git a/drivers/nvmem/layouts.c b/drivers/nvmem/layouts.c
index 65d39e19f6ec..f381ce1e84bd 100644
--- a/drivers/nvmem/layouts.c
+++ b/drivers/nvmem/layouts.c
@@ -45,11 +45,24 @@ static void nvmem_layout_bus_remove(struct device *dev)
 	return drv->remove(layout);
 }
 
+static int nvmem_layout_bus_uevent(const struct device *dev,
+				   struct kobj_uevent_env *env)
+{
+	int ret;
+
+	ret = of_device_uevent_modalias(dev, env);
+	if (ret != ENODEV)
+		return ret;
+
+	return 0;
+}
+
 static const struct bus_type nvmem_layout_bus_type = {
 	.name		= "nvmem-layout",
 	.match		= nvmem_layout_bus_match,
 	.probe		= nvmem_layout_bus_probe,
 	.remove		= nvmem_layout_bus_remove,
+	.uevent		= nvmem_layout_bus_uevent,
 };
 
 int __nvmem_layout_driver_register(struct nvmem_layout_driver *drv,
diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index 18fb44139de2..d63aaad7ef59 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -239,6 +239,14 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "WUJIE14-GX4HRXL"),
 		}
 	},
+	{
+		.ident = "MECHREVO Yilong15Pro Series GM5HG7A",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MECHREVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Yilong15Pro Series GM5HG7A"),
+		}
+	},
 	/* https://bugzilla.kernel.org/show_bug.cgi?id=220116 */
 	{
 		.ident = "PCSpecialist Lafite Pro V 14M",
@@ -248,6 +256,13 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Lafite Pro V 14M"),
 		}
 	},
+	{
+		.ident = "TUXEDO Stellaris Slim 15 AMD Gen6",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
+		}
+	},
 	{
 		.ident = "TUXEDO InfinityBook Pro 14/15 AMD Gen10",
 		.driver_data = &quirk_spurious_8042,
diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index ef988605c4da..bc544a4a5266 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -403,6 +403,7 @@ static const struct acpi_device_id amd_pmf_acpi_ids[] = {
 	{"AMDI0103", 0},
 	{"AMDI0105", 0},
 	{"AMDI0107", 0},
+	{"AMDI0108", 0},
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, amd_pmf_acpi_ids);
diff --git a/drivers/platform/x86/oxpec.c b/drivers/platform/x86/oxpec.c
index eb076bb4099b..4f540a9932fe 100644
--- a/drivers/platform/x86/oxpec.c
+++ b/drivers/platform/x86/oxpec.c
@@ -306,6 +306,13 @@ static const struct dmi_system_id dmi_table[] = {
 		},
 		.driver_data = (void *)oxp_x1,
 	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "ONE-NETBOOK"),
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "ONEXPLAYER X1Pro EVA-02"),
+		},
+		.driver_data = (void *)oxp_x1,
+	},
 	{},
 };
 
diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c
index 351f983ef914..d88e026204e0 100644
--- a/drivers/staging/axis-fifo/axis-fifo.c
+++ b/drivers/staging/axis-fifo/axis-fifo.c
@@ -42,7 +42,6 @@
 #define DRIVER_NAME "axis_fifo"
 
 #define READ_BUF_SIZE 128U /* read buffer length in words */
-#define WRITE_BUF_SIZE 128U /* write buffer length in words */
 
 /* ----------------------------
  *     IP register offsets
@@ -392,6 +391,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 	}
 
 	bytes_available = ioread32(fifo->base_addr + XLLF_RLR_OFFSET);
+	words_available = bytes_available / sizeof(u32);
 	if (!bytes_available) {
 		dev_err(fifo->dt_device, "received a packet of length 0\n");
 		ret = -EIO;
@@ -402,7 +402,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		dev_err(fifo->dt_device, "user read buffer too small (available bytes=%zu user buffer bytes=%zu)\n",
 			bytes_available, len);
 		ret = -EINVAL;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
 	if (bytes_available % sizeof(u32)) {
@@ -411,11 +411,9 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		 */
 		dev_err(fifo->dt_device, "received a packet that isn't word-aligned\n");
 		ret = -EIO;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
-	words_available = bytes_available / sizeof(u32);
-
 	/* read data into an intermediate buffer, copying the contents
 	 * to userspace when the buffer is full
 	 */
@@ -427,18 +425,23 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 			tmp_buf[i] = ioread32(fifo->base_addr +
 					      XLLF_RDFD_OFFSET);
 		}
+		words_available -= copy;
 
 		if (copy_to_user(buf + copied * sizeof(u32), tmp_buf,
 				 copy * sizeof(u32))) {
 			ret = -EFAULT;
-			goto end_unlock;
+			goto err_flush_rx;
 		}
 
 		copied += copy;
-		words_available -= copy;
 	}
+	mutex_unlock(&fifo->read_lock);
+
+	return bytes_available;
 
-	ret = bytes_available;
+err_flush_rx:
+	while (words_available--)
+		ioread32(fifo->base_addr + XLLF_RDFD_OFFSET);
 
 end_unlock:
 	mutex_unlock(&fifo->read_lock);
@@ -466,11 +469,8 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 {
 	struct axis_fifo *fifo = (struct axis_fifo *)f->private_data;
 	unsigned int words_to_write;
-	unsigned int copied;
-	unsigned int copy;
-	unsigned int i;
+	u32 *txbuf;
 	int ret;
-	u32 tmp_buf[WRITE_BUF_SIZE];
 
 	if (len % sizeof(u32)) {
 		dev_err(fifo->dt_device,
@@ -486,11 +486,17 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		return -EINVAL;
 	}
 
-	if (words_to_write > fifo->tx_fifo_depth) {
-		dev_err(fifo->dt_device, "tried to write more words [%u] than slots in the fifo buffer [%u]\n",
-			words_to_write, fifo->tx_fifo_depth);
+	/*
+	 * In 'Store-and-Forward' mode, the maximum packet that can be
+	 * transmitted is limited by the size of the FIFO, which is
+	 * (C_TX_FIFO_DEPTH–4)*(data interface width/8) bytes.
+	 *
+	 * Do not attempt to send a packet larger than 'tx_fifo_depth - 4',
+	 * otherwise a 'Transmit Packet Overrun Error' interrupt will be
+	 * raised, which requires a reset of the TX circuit to recover.
+	 */
+	if (words_to_write > (fifo->tx_fifo_depth - 4))
 		return -EINVAL;
-	}
 
 	if (fifo->write_flags & O_NONBLOCK) {
 		/*
@@ -529,32 +535,20 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		}
 	}
 
-	/* write data from an intermediate buffer into the fifo IP, refilling
-	 * the buffer with userspace data as needed
-	 */
-	copied = 0;
-	while (words_to_write > 0) {
-		copy = min(words_to_write, WRITE_BUF_SIZE);
-
-		if (copy_from_user(tmp_buf, buf + copied * sizeof(u32),
-				   copy * sizeof(u32))) {
-			ret = -EFAULT;
-			goto end_unlock;
-		}
-
-		for (i = 0; i < copy; i++)
-			iowrite32(tmp_buf[i], fifo->base_addr +
-				  XLLF_TDFD_OFFSET);
-
-		copied += copy;
-		words_to_write -= copy;
+	txbuf = vmemdup_user(buf, len);
+	if (IS_ERR(txbuf)) {
+		ret = PTR_ERR(txbuf);
+		goto end_unlock;
 	}
 
-	ret = copied * sizeof(u32);
+	for (int i = 0; i < words_to_write; ++i)
+		iowrite32(txbuf[i], fifo->base_addr + XLLF_TDFD_OFFSET);
 
 	/* write packet size to fifo */
-	iowrite32(ret, fifo->base_addr + XLLF_TLR_OFFSET);
+	iowrite32(len, fifo->base_addr + XLLF_TLR_OFFSET);
 
+	ret = len;
+	kvfree(txbuf);
 end_unlock:
 	mutex_unlock(&fifo->write_lock);
 
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 79a8186d3361..d80353287a05 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1405,7 +1405,7 @@ config SERIAL_STM32
 
 config SERIAL_STM32_CONSOLE
 	bool "Support for console on STM32"
-	depends on SERIAL_STM32=y
+	depends on SERIAL_STM32
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
 
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index fc869b7f803f..62e984d20e59 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2114,6 +2114,12 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE(0x1e0e, 0x9071),				/* Simcom SIM8230 RMNET mode */
+	  .driver_info = RSVD(3) | RSVD(4) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9078, 0xff),	/* Simcom SIM8230 ECM mode */
+	  .driver_info = RSVD(5) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x907b, 0xff),	/* Simcom SIM8230 RNDIS mode */
+	  .driver_info = RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index 2928abf7eb82..fc46190d26c8 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -998,11 +998,18 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
 	if (!btrfs_test_opt(fs_info, REF_VERIFY))
 		return 0;
 
+	extent_root = btrfs_extent_root(fs_info, 0);
+	/* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */
+	if (IS_ERR(extent_root)) {
+		btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling");
+		btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
+		return 0;
+	}
+
 	path = btrfs_alloc_path();
 	if (!path)
 		return -ENOMEM;
 
-	extent_root = btrfs_extent_root(fs_info, 0);
 	eb = btrfs_read_lock_root_node(extent_root);
 	level = btrfs_header_level(eb);
 	path->nodes[level] = eb;
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index f27ea5099a68..09394ac2c180 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -347,7 +347,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
 		folio_put(folio);
 		ret = filemap_write_and_wait_range(mapping, fpos, fpos + flen - 1);
 		if (ret < 0)
-			goto error_folio_unlock;
+			goto out;
 		continue;
 
 	copied:
diff --git a/include/linux/device.h b/include/linux/device.h
index 4940db137fff..94bbdef14088 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -851,6 +851,9 @@ static inline bool device_pm_not_required(struct device *dev)
 static inline void device_set_pm_not_required(struct device *dev)
 {
 	dev->power.no_pm = true;
+#ifdef CONFIG_PM
+	dev->power.no_callbacks = true;
+#endif
 }
 
 static inline void dev_pm_syscore_device(struct device *dev, bool val)
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 24bb5287c415..2bb311d99c10 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -7180,7 +7180,7 @@ int ring_buffer_map(struct trace_buffer *buffer, int cpu,
 		atomic_dec(&cpu_buffer->resize_disabled);
 	}
 
-	return 0;
+	return err;
 }
 
 int ring_buffer_unmap(struct trace_buffer *buffer, int cpu)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 339ec4e54778..8992d8bebbdd 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -726,10 +726,10 @@ static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req)
 	p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req);
 
 	spin_lock(&m->req_lock);
-	/* Ignore cancelled request if message has been received
-	 * before lock.
-	 */
-	if (req->status == REQ_STATUS_RCVD) {
+	/* Ignore cancelled request if status changed since the request was
+	 * processed in p9_client_flush()
+	*/
+	if (req->status != REQ_STATUS_SENT) {
 		spin_unlock(&m->req_lock);
 		return 0;
 	}
diff --git a/rust/kernel/block/mq/gen_disk.rs b/rust/kernel/block/mq/gen_disk.rs
index cd54cd64ea88..e1af0fa302a3 100644
--- a/rust/kernel/block/mq/gen_disk.rs
+++ b/rust/kernel/block/mq/gen_disk.rs
@@ -3,7 +3,7 @@
 //! Generic disk abstraction.
 //!
 //! C header: [`include/linux/blkdev.h`](srctree/include/linux/blkdev.h)
-//! C header: [`include/linux/blk_mq.h`](srctree/include/linux/blk_mq.h)
+//! C header: [`include/linux/blk-mq.h`](srctree/include/linux/blk-mq.h)
 
 use crate::block::mq::{raw_writer::RawWriter, Operations, TagSet};
 use crate::{bindings, error::from_err_ptr, error::Result, sync::Arc};
diff --git a/rust/kernel/drm/device.rs b/rust/kernel/drm/device.rs
index 3832779f439f..8df6fb06396c 100644
--- a/rust/kernel/drm/device.rs
+++ b/rust/kernel/drm/device.rs
@@ -2,7 +2,7 @@
 
 //! DRM device.
 //!
-//! C header: [`include/linux/drm/drm_device.h`](srctree/include/linux/drm/drm_device.h)
+//! C header: [`include/drm/drm_device.h`](srctree/include/drm/drm_device.h)
 
 use crate::{
     alloc::allocator::Kmalloc,
diff --git a/rust/kernel/drm/driver.rs b/rust/kernel/drm/driver.rs
index af93d46d03d3..349a50d188dd 100644
--- a/rust/kernel/drm/driver.rs
+++ b/rust/kernel/drm/driver.rs
@@ -2,7 +2,7 @@
 
 //! DRM driver core.
 //!
-//! C header: [`include/linux/drm/drm_drv.h`](srctree/include/linux/drm/drm_drv.h)
+//! C header: [`include/drm/drm_drv.h`](srctree/include/drm/drm_drv.h)
 
 use crate::{
     bindings, device,
diff --git a/rust/kernel/drm/file.rs b/rust/kernel/drm/file.rs
index b9527705e551..f736cade7eb4 100644
--- a/rust/kernel/drm/file.rs
+++ b/rust/kernel/drm/file.rs
@@ -2,7 +2,7 @@
 
 //! DRM File objects.
 //!
-//! C header: [`include/linux/drm/drm_file.h`](srctree/include/linux/drm/drm_file.h)
+//! C header: [`include/drm/drm_file.h`](srctree/include/drm/drm_file.h)
 
 use crate::{bindings, drm, error::Result, prelude::*, types::Opaque};
 use core::marker::PhantomData;
diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index 4cd69fa84318..f0af5a5f2a91 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -2,7 +2,7 @@
 
 //! DRM GEM API
 //!
-//! C header: [`include/linux/drm/drm_gem.h`](srctree/include/linux/drm/drm_gem.h)
+//! C header: [`include/drm/drm_gem.h`](srctree/include/drm/drm_gem.h)
 
 use crate::{
     alloc::flags::*,
diff --git a/rust/kernel/drm/ioctl.rs b/rust/kernel/drm/ioctl.rs
index 445639404fb7..a19bc8eca029 100644
--- a/rust/kernel/drm/ioctl.rs
+++ b/rust/kernel/drm/ioctl.rs
@@ -2,7 +2,7 @@
 
 //! DRM IOCTL definitions.
 //!
-//! C header: [`include/linux/drm/drm_ioctl.h`](srctree/include/linux/drm/drm_ioctl.h)
+//! C header: [`include/drm/drm_ioctl.h`](srctree/include/drm/drm_ioctl.h)
 
 use crate::ioctl;
 
diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
index 8435f8132e38..9c9f256c7f8f 100644
--- a/rust/kernel/pci.rs
+++ b/rust/kernel/pci.rs
@@ -238,8 +238,8 @@ pub trait Driver: Send {
 
     /// PCI driver probe.
     ///
-    /// Called when a new platform device is added or discovered.
-    /// Implementers should attempt to initialize the device here.
+    /// Called when a new pci device is added or discovered. Implementers should
+    /// attempt to initialize the device here.
     fn probe(dev: &Device<device::Core>, id_info: &Self::IdInfo) -> Result<Pin<KBox<Self>>>;
 }
 
diff --git a/sound/pci/hda/tas2781_hda.c b/sound/pci/hda/tas2781_hda.c
index 34217ce9f28e..716bdc5f7d0c 100644
--- a/sound/pci/hda/tas2781_hda.c
+++ b/sound/pci/hda/tas2781_hda.c
@@ -31,6 +31,23 @@ const efi_guid_t tasdev_fct_efi_guid[] = {
 };
 EXPORT_SYMBOL_NS_GPL(tasdev_fct_efi_guid, "SND_HDA_SCODEC_TAS2781");
 
+/*
+ * The order of calibrated-data writing function is a bit different from the
+ * order in UEFI. Here is the conversion to match the order of calibrated-data
+ * writing function.
+ */
+static void cali_cnv(unsigned char *data, unsigned int base, int offset)
+{
+	struct cali_reg reg_data;
+
+	memcpy(&reg_data, &data[base], sizeof(reg_data));
+	/* the data order has to be swapped between r0_low_reg and inv0_reg */
+	swap(reg_data.r0_low_reg, reg_data.invr0_reg);
+
+	cpu_to_be32_array((__force __be32 *)(data + offset + 1),
+		(u32 *)&reg_data, TASDEV_CALIB_N);
+}
+
 static void tas2781_apply_calib(struct tasdevice_priv *p)
 {
 	struct calidata *cali_data = &p->cali_data;
@@ -101,8 +118,7 @@ static void tas2781_apply_calib(struct tasdevice_priv *p)
 
 				data[l] = k;
 				oft++;
-				for (i = 0; i < TASDEV_CALIB_N * 4; i++)
-					data[l + i + 1] = data[4 * oft + i];
+				cali_cnv(data, 4 * oft, l);
 				k++;
 			}
 		}
@@ -128,9 +144,8 @@ static void tas2781_apply_calib(struct tasdevice_priv *p)
 
 		for (j = p->ndev - 1; j >= 0; j--) {
 			l = j * (cali_data->cali_dat_sz_per_dev + 1);
-			for (i = TASDEV_CALIB_N * 4; i > 0 ; i--)
-				data[l + i] = data[p->index * 5 + i];
-			data[l+i] = j;
+			cali_cnv(data, cali_data->cali_dat_sz_per_dev * j, l);
+			data[l] = j;
 		}
 	}
 
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index cb8d97122f95..73a028e67246 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -130,7 +130,7 @@
 #define PDM_DMA_INTR_MASK       0x10000
 #define PDM_DEC_64              0x2
 #define PDM_CLK_FREQ_MASK       0x07
-#define PDM_MISC_CTRL_MASK      0x10
+#define PDM_MISC_CTRL_MASK      0x18
 #define PDM_ENABLE              0x01
 #define PDM_DISABLE             0x00
 #define DMA_EN_MASK             0x02
diff --git a/sound/soc/codecs/rt5682s.c b/sound/soc/codecs/rt5682s.c
index 73c4b3c31f8c..d44f7574631d 100644
--- a/sound/soc/codecs/rt5682s.c
+++ b/sound/soc/codecs/rt5682s.c
@@ -653,14 +653,15 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 	switch (mode) {
 	case SAR_PWR_SAVING:
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_3,
-			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_DIS);
+			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_EN);
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK,
-			RT5682S_CTRL_MB1_REG | RT5682S_CTRL_MB2_REG);
+			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK |
+			RT5682S_VREF_POW_MASK, RT5682S_CTRL_MB1_FSM |
+			RT5682S_CTRL_MB2_FSM | RT5682S_VREF_POW_FSM);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		usleep_range(5000, 5500);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK, RT5682S_SAR_BUTDET_EN);
@@ -688,7 +689,7 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		break;
 	default:
 		dev_err(component->dev, "Invalid SAR Power mode: %d\n", mode);
@@ -725,7 +726,7 @@ static void rt5682s_disable_push_button_irq(struct snd_soc_component *component)
 	snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 		RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 		RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-		RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+		RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 }
 
 /**
@@ -786,7 +787,7 @@ static int rt5682s_headset_detect(struct snd_soc_component *component, int jack_
 			jack_type = SND_JACK_HEADSET;
 			snd_soc_component_write(component, RT5682S_SAR_IL_CMD_3, 0x024c);
 			snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_EN);
+				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_DIS);
 			snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 				RT5682S_SAR_SEL_MB1_2_MASK, val << RT5682S_SAR_SEL_MB1_2_SFT);
 			rt5682s_enable_push_button_irq(component);
@@ -966,7 +967,7 @@ static int rt5682s_set_jack_detect(struct snd_soc_component *component,
 			RT5682S_EMB_JD_MASK | RT5682S_DET_TYPE |
 			RT5682S_POL_FAST_OFF_MASK | RT5682S_MIC_CAP_MASK,
 			RT5682S_EMB_JD_EN | RT5682S_DET_TYPE |
-			RT5682S_POL_FAST_OFF_HIGH | RT5682S_MIC_CAP_HS);
+			RT5682S_POL_FAST_OFF_LOW | RT5682S_MIC_CAP_HS);
 		regmap_update_bits(rt5682s->regmap, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_POW_MASK, RT5682S_SAR_POW_EN);
 		regmap_update_bits(rt5682s->regmap, RT5682S_GPIO_CTRL_1,
diff --git a/sound/soc/codecs/rt712-sdca.c b/sound/soc/codecs/rt712-sdca.c
index 570c2af1245d..0c57aee766b5 100644
--- a/sound/soc/codecs/rt712-sdca.c
+++ b/sound/soc/codecs/rt712-sdca.c
@@ -1891,11 +1891,9 @@ int rt712_sdca_io_init(struct device *dev, struct sdw_slave *slave)
 
 		rt712_sdca_va_io_init(rt712);
 	} else {
-		if (!rt712->dmic_function_found) {
-			dev_err(&slave->dev, "%s RT712 VB detected but no SMART_MIC function exposed in ACPI\n",
+		if (!rt712->dmic_function_found)
+			dev_warn(&slave->dev, "%s RT712 VB detected but no SMART_MIC function exposed in ACPI\n",
 				__func__);
-			goto suspend;
-		}
 
 		/* multilanes and DMIC are supported by rt712vb */
 		prop->lane_control_support = true;
diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
index 9ef569492560..ddaeb4eb3e24 100644
--- a/tools/lib/subcmd/help.c
+++ b/tools/lib/subcmd/help.c
@@ -75,6 +75,9 @@ void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
 	size_t ci, cj, ei;
 	int cmp;
 
+	if (!excludes->cnt)
+		return;
+
 	ci = cj = ei = 0;
 	while (ci < cmds->cnt && ei < excludes->cnt) {
 		cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);

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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.16.12
Date: Sun, 12 Oct 2025 13:24:21 +0200
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SpamTally: Final spam score: 24

Note, this is the LAST 6.16.y kernel release, this branch is now
end-of-life.  Please move to the 6.17.y branch at this point in time.

-----------------------

I'm announcing the release of the 6.16.12 kernel.

All users of the 6.16 kernel series must upgrade.

The updated 6.16.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.16.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                            |    2 
 arch/x86/kvm/emulate.c                              |    9 +-
 arch/x86/kvm/kvm_emulate.h                          |    3 
 arch/x86/kvm/x86.c                                  |   15 ++--
 crypto/rng.c                                        |    8 ++
 drivers/android/dbitmap.h                           |    1 
 drivers/base/faux.c                                 |    1 
 drivers/bluetooth/btusb.c                           |    2 
 drivers/gpio/gpiolib-acpi-quirks.c                  |   12 +++
 drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c              |   15 ++++
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c              |    6 +
 drivers/gpu/drm/amd/amdgpu/mes_v12_0.c              |    5 +
 drivers/gpu/drm/amd/include/mes_v11_api_def.h       |    3 
 drivers/gpu/drm/amd/include/mes_v12_api_def.h       |    3 
 drivers/hid/hid-mcp2221.c                           |    4 +
 drivers/iommu/iommufd/device.c                      |    3 
 drivers/iommu/iommufd/iommufd_private.h             |    3 
 drivers/iommu/iommufd/main.c                        |    4 +
 drivers/md/dm-integrity.c                           |    2 
 drivers/misc/amd-sbi/Kconfig                        |    1 
 drivers/net/can/rcar/rcar_canfd.c                   |    7 +-
 drivers/net/can/spi/hi311x.c                        |   33 +++++----
 drivers/net/wireless/realtek/rtl8xxxu/core.c        |    2 
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c |    1 
 drivers/net/wireless/realtek/rtw89/chan.c           |   35 ++++++++++
 drivers/net/wireless/realtek/rtw89/chan.h           |    2 
 drivers/net/wireless/realtek/rtw89/core.c           |   32 +++++++--
 drivers/net/wireless/realtek/rtw89/core.h           |   37 ++++++++++
 drivers/net/wireless/realtek/rtw89/pci.c            |    3 
 drivers/net/wireless/realtek/rtw89/ser.c            |    2 
 drivers/nvmem/layouts.c                             |   13 +++
 drivers/platform/x86/amd/pmc/pmc-quirks.c           |   15 ++++
 drivers/platform/x86/amd/pmf/core.c                 |    1 
 drivers/platform/x86/oxpec.c                        |    7 ++
 drivers/staging/axis-fifo/axis-fifo.c               |   68 +++++++++-----------
 drivers/tty/serial/Kconfig                          |    2 
 drivers/usb/serial/option.c                         |    6 +
 fs/btrfs/ref-verify.c                               |    9 ++
 fs/netfs/buffered_write.c                           |    2 
 include/linux/device.h                              |    3 
 kernel/trace/ring_buffer.c                          |    2 
 net/9p/trans_fd.c                                   |    8 +-
 rust/kernel/block/mq/gen_disk.rs                    |    2 
 rust/kernel/drm/device.rs                           |    2 
 rust/kernel/drm/driver.rs                           |    2 
 rust/kernel/drm/file.rs                             |    2 
 rust/kernel/drm/gem/mod.rs                          |    2 
 rust/kernel/drm/ioctl.rs                            |    2 
 rust/kernel/pci.rs                                  |    4 -
 sound/pci/hda/tas2781_hda.c                         |   25 +++++--
 sound/soc/amd/acp/amd.h                             |    2 
 sound/soc/codecs/rt5682s.c                          |   17 ++---
 sound/soc/codecs/rt712-sdca.c                       |    6 -
 tools/lib/subcmd/help.c                             |    3 
 54 files changed, 338 insertions(+), 123 deletions(-)

Ankit Khushwaha (1):
      ring buffer: Propagate __rb_map_vma return value to caller

Antheas Kapenekakis (2):
      gpiolib: acpi: Ignore touchpad wakeup on GPD G1619-05
      platform/x86: oxpec: Add support for OneXPlayer X1Pro EVA-02

Arnaud Lecomte (1):
      hid: fix I2C read buffer overflow in raw_event() for mcp2221

Bitterblue Smith (2):
      wifi: rtlwifi: rtl8192cu: Don't claim USB ID 07b8:8188
      wifi: rtl8xxxu: Don't claim USB ID 07b8:8188

Carlos Llamas (1):
      binder: fix double-free in dbitmap

Chen Yufeng (1):
      can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled

Chih-Kang Chang (1):
      wifi: rtw89: mcc: stop TX during MCC prepare

Christoffer Sandberg (1):
      platform/x86/amd/pmc: Add Stellaris Slim Gen6 AMD to spurious 8042 quirks list

David Sterba (1):
      btrfs: ref-verify: handle damaged extent root tree

Duy Nguyen (1):
      can: rcar_canfd: Fix controller mode setting

Fedor Pchelkin (1):
      wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()

Greg Kroah-Hartman (1):
      Linux 6.16.12

Herbert Xu (1):
      crypto: rng - Ensure set_ent is always present

Jack Yu (1):
      ASoC: rt5682s: Adjust SAR ADC button mode to fix noise issue

Jason Gunthorpe (1):
      iommufd: WARN if an object is aborted with an elevated refcount

Lizhi Xu (1):
      netfs: Prevent duplicate unlocking

Mario Limonciello (1):
      drm/amdgpu: Enable MES lr_compute_wa by default

Max Kellermann (1):
      drivers/misc/amd-sbi/Kconfig: select REGMAP_I2C

Michael Walle (1):
      nvmem: layouts: fix automatic module loading

Miguel Ojeda (2):
      rust: drm: fix `srctree/` links
      rust: block: fix `srctree/` links

Mikulas Patocka (1):
      dm-integrity: limit MAX_TAG_SIZE to 255

Nalivayko Sergey (1):
      net/9p: fix double req put in p9_fd_cancelled

Ovidiu Panait (3):
      staging: axis-fifo: fix maximum TX packet length check
      staging: axis-fifo: fix TX handling on copy_from_user() failure
      staging: axis-fifo: flush RX FIFO on read errors

Rafael J. Wysocki (2):
      driver core: faux: Set power.no_pm for faux devices
      driver core/PM: Set power.no_callbacks along with power.no_pm

Rahul Rameshbabu (1):
      rust: pci: fix incorrect platform reference in PCI driver probe doc comment

Raphael Gallais-Pou (1):
      serial: stm32: allow selecting console when the driver is module

Sean Christopherson (1):
      KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

Shenghao Ding (1):
      ALSA: hda/tas2781: Fix the order of TAS2781 calibrated-data

Shuming Fan (1):
      ASoC: rt712: avoid skipping the blind write

Shyam Sundar S K (1):
      platform/x86/amd/pmf: Support new ACPI ID AMDI0108

Srinivasan Shanmugam (1):
      drm/amdgpu/gfx11: Add Cleaner Shader Support for GFX11.0.1/11.0.4 GPUs

Venkata Prasad Potturu (1):
      ASoC: amd: acp: Adjust pdm gain value

Xiaowei Li (1):
      USB: serial: option: add SIMCom 8230C compositions

Zenm Chen (1):
      Bluetooth: btusb: Add USB ID 2001:332a for D-Link AX9U rev. A1

aprilgrimoire (1):
      platform/x86/amd/pmc: Add MECHREVO Yilong15Pro to spurious_8042 list

hupu (1):
      perf subcmd: avoid crash in exclude_cmds when excludes is empty

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diff --git a/Makefile b/Makefile
index 05b7983b56ed..3345d6257350 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 12
-SUBLEVEL = 51
+SUBLEVEL = 52
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 60986f67c35a..4b4394414103 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5104,12 +5104,11 @@ void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 	ctxt->mem_read.end = 0;
 }
 
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts)
 {
 	const struct x86_emulate_ops *ops = ctxt->ops;
 	int rc = X86EMUL_CONTINUE;
 	int saved_dst_type = ctxt->dst.type;
-	bool is_guest_mode = ctxt->ops->is_guest_mode(ctxt);
 
 	ctxt->mem_read.pos = 0;
 
@@ -5157,7 +5156,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(&ctxt->dst);
 		}
 
-		if (unlikely(is_guest_mode) && ctxt->intercept) {
+		if (unlikely(check_intercepts) && ctxt->intercept) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5186,7 +5185,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				goto done;
 		}
 
-		if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+		if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5240,7 +5239,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+	if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index 10495fffb890..1bede46b67c3 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -230,7 +230,6 @@ struct x86_emulate_ops {
 	void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked);
 
 	bool (*is_smm)(struct x86_emulate_ctxt *ctxt);
-	bool (*is_guest_mode)(struct x86_emulate_ctxt *ctxt);
 	int (*leave_smm)(struct x86_emulate_ctxt *ctxt);
 	void (*triple_fault)(struct x86_emulate_ctxt *ctxt);
 	int (*set_xcr)(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr);
@@ -514,7 +513,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt);
 #define EMULATION_RESTART 1
 #define EMULATION_INTERCEPTED 2
 void init_decode_cache(struct x86_emulate_ctxt *ctxt);
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts);
 int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
 			 u16 tss_selector, int idt_index, int reason,
 			 bool has_error_code, u32 error_code);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 13ab13d2e9d6..86cabeca6265 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8567,11 +8567,6 @@ static bool emulator_is_smm(struct x86_emulate_ctxt *ctxt)
 	return is_smm(emul_to_vcpu(ctxt));
 }
 
-static bool emulator_is_guest_mode(struct x86_emulate_ctxt *ctxt)
-{
-	return is_guest_mode(emul_to_vcpu(ctxt));
-}
-
 #ifndef CONFIG_KVM_SMM
 static int emulator_leave_smm(struct x86_emulate_ctxt *ctxt)
 {
@@ -8655,7 +8650,6 @@ static const struct x86_emulate_ops emulate_ops = {
 	.guest_cpuid_is_intel_compatible = emulator_guest_cpuid_is_intel_compatible,
 	.set_nmi_mask        = emulator_set_nmi_mask,
 	.is_smm              = emulator_is_smm,
-	.is_guest_mode       = emulator_is_guest_mode,
 	.leave_smm           = emulator_leave_smm,
 	.triple_fault        = emulator_triple_fault,
 	.set_xcr             = emulator_set_xcr,
@@ -9209,7 +9203,14 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		ctxt->exception.address = 0;
 	}
 
-	r = x86_emulate_insn(ctxt);
+	/*
+	 * Check L1's instruction intercepts when emulating instructions for
+	 * L2, unless KVM is re-emulating a previously decoded instruction,
+	 * e.g. to complete userspace I/O, in which case KVM has already
+	 * checked the intercepts.
+	 */
+	r = x86_emulate_insn(ctxt, is_guest_mode(vcpu) &&
+				   !(emulation_type & EMULTYPE_NO_DECODE));
 
 	if (r == EMULATION_INTERCEPTED)
 		return 1;
diff --git a/crypto/rng.c b/crypto/rng.c
index 9d8804e46422..72da96fdfb5d 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -167,6 +167,11 @@ int crypto_del_default_rng(void)
 EXPORT_SYMBOL_GPL(crypto_del_default_rng);
 #endif
 
+static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data,
+				unsigned int len)
+{
+}
+
 int crypto_register_rng(struct rng_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;
@@ -178,6 +183,9 @@ int crypto_register_rng(struct rng_alg *alg)
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_RNG;
 
+	if (!alg->set_ent)
+		alg->set_ent = rng_default_set_ent;
+
 	return crypto_register_alg(base);
 }
 EXPORT_SYMBOL_GPL(crypto_register_rng);
diff --git a/drivers/android/dbitmap.h b/drivers/android/dbitmap.h
index 956f1bd087d1..c7299ce8b374 100644
--- a/drivers/android/dbitmap.h
+++ b/drivers/android/dbitmap.h
@@ -37,6 +37,7 @@ static inline void dbitmap_free(struct dbitmap *dmap)
 {
 	dmap->nbits = 0;
 	kfree(dmap->map);
+	dmap->map = NULL;
 }
 
 /* Returns the nbits that a dbitmap can shrink to, 0 if not possible. */
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index d7aaaeb4fe32..c07d57eaca3b 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -514,6 +514,8 @@ static const struct usb_device_id quirks_table[] = {
 	/* Realtek 8851BU Bluetooth devices */
 	{ USB_DEVICE(0x3625, 0x010b), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x2001, 0x332a), .driver_info = BTUSB_REALTEK |
+						     BTUSB_WIDEBAND_SPEECH },
 
 	/* Realtek 8852AE Bluetooth devices */
 	{ USB_DEVICE(0x0bda, 0x2852), .driver_info = BTUSB_REALTEK |
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 49113df8baef..25b175f23312 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -677,6 +677,12 @@ static int mes_v11_0_set_hw_resources(struct amdgpu_mes *mes)
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
 	mes_set_hw_res_pkt.oversubscription_timer = 50;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x7f)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(mes->adev->dev,
+			      "MES FW version must be >= 0x7f to enable LR compute workaround.\n");
+
 	if (amdgpu_mes_log_enable) {
 		mes_set_hw_res_pkt.enable_mes_event_int_logging = 1;
 		mes_set_hw_res_pkt.event_intr_history_gpu_mc_ptr =
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index 459f7b8d72b4..e3f4f5fbbd6e 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -610,6 +610,11 @@ static int mes_v12_0_set_hw_resources(struct amdgpu_mes *mes, int pipe)
 	mes_set_hw_res_pkt.use_different_vmid_compute = 1;
 	mes_set_hw_res_pkt.enable_reg_active_poll = 1;
 	mes_set_hw_res_pkt.enable_level_process_quantum_check = 1;
+	if ((mes->adev->mes.sched_version & AMDGPU_MES_VERSION_MASK) >= 0x82)
+		mes_set_hw_res_pkt.enable_lr_compute_wa = 1;
+	else
+		dev_info_once(adev->dev,
+			      "MES FW version must be >= 0x82 to enable LR compute workaround.\n");
 
 	/*
 	 * Keep oversubscribe timer for sdma . When we have unmapped doorbell
diff --git a/drivers/gpu/drm/amd/include/mes_v11_api_def.h b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
index 21ceafce1f9b..ab1cfc92dbeb 100644
--- a/drivers/gpu/drm/amd/include/mes_v11_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v11_api_def.h
@@ -230,13 +230,24 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t disable_add_queue_wptr_mc_addr : 1;
 				uint32_t enable_mes_event_int_logging : 1;
 				uint32_t enable_reg_active_poll : 1;
-				uint32_t reserved	: 21;
+				uint32_t use_disable_queue_in_legacy_uq_preemption : 1;
+				uint32_t send_write_data : 1;
+				uint32_t os_tdr_timeout_override : 1;
+				uint32_t use_rs64mem_for_proc_gang_ctx : 1;
+				uint32_t use_add_queue_unmap_flag_addr : 1;
+				uint32_t enable_mes_sch_stb_log : 1;
+				uint32_t limit_single_process : 1;
+				uint32_t is_strix_tmz_wa_enabled  :1;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 12;
 			};
 			uint32_t	uint32_t_all;
 		};
 		uint32_t	oversubscription_timer;
 		uint64_t        doorbell_info;
 		uint64_t        event_intr_history_gpu_mc_ptr;
+		uint64_t	timestamp;
+		uint32_t	os_tdr_timeout_in_sec;
 	};
 
 	uint32_t	max_dwords_in_api[API_FRAME_SIZE_IN_DWORDS];
@@ -256,7 +267,8 @@ union MESAPI_SET_HW_RESOURCES_1 {
 		};
 		uint64_t							mes_info_ctx_mc_addr;
 		uint32_t							mes_info_ctx_size;
-		uint32_t							mes_kiq_unmap_timeout; // unit is 100ms
+		uint64_t							reserved1;
+		uint64_t							cleaner_shader_fence_mc_addr;
 	};
 
 	uint32_t max_dwords_in_api[API_FRAME_SIZE_IN_DWORDS];
@@ -563,6 +575,11 @@ enum MESAPI_MISC_OPCODE {
 	MESAPI_MISC__READ_REG,
 	MESAPI_MISC__WAIT_REG_MEM,
 	MESAPI_MISC__SET_SHADER_DEBUGGER,
+	MESAPI_MISC__NOTIFY_WORK_ON_UNMAPPED_QUEUE,
+	MESAPI_MISC__NOTIFY_TO_UNMAP_PROCESSES,
+	MESAPI_MISC__CHANGE_CONFIG,
+	MESAPI_MISC__LAUNCH_CLEANER_SHADER,
+
 	MESAPI_MISC__MAX,
 };
 
@@ -617,6 +634,31 @@ struct SET_SHADER_DEBUGGER {
 	uint32_t trap_en;
 };
 
+enum MESAPI_MISC__CHANGE_CONFIG_OPTION {
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_LIMIT_SINGLE_PROCESS = 0,
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_ENABLE_HWS_LOGGING_BUFFER = 1,
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_CHANGE_TDR_CONFIG    = 2,
+
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_MAX = 0x1F
+};
+
+struct CHANGE_CONFIG {
+	enum MESAPI_MISC__CHANGE_CONFIG_OPTION opcode;
+	union {
+		struct {
+			uint32_t limit_single_process : 1;
+			uint32_t enable_hws_logging_buffer : 1;
+			uint32_t reserved : 31;
+		} bits;
+		uint32_t all;
+	} option;
+
+	struct {
+		uint32_t tdr_level;
+		uint32_t tdr_delay;
+	} tdr_config;
+};
+
 union MESAPI__MISC {
 	struct {
 		union MES_API_HEADER	header;
@@ -631,6 +673,7 @@ union MESAPI__MISC {
 			struct          WAIT_REG_MEM wait_reg_mem;
 			struct		SET_SHADER_DEBUGGER set_shader_debugger;
 			enum MES_AMD_PRIORITY_LEVEL queue_sch_level;
+			struct		CHANGE_CONFIG change_config;
 
 			uint32_t	data[MISC_DATA_MAX_SIZE_IN_DWORDS];
 		};
diff --git a/drivers/gpu/drm/amd/include/mes_v12_api_def.h b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
index 101e2fe962c6..a402974939d6 100644
--- a/drivers/gpu/drm/amd/include/mes_v12_api_def.h
+++ b/drivers/gpu/drm/amd/include/mes_v12_api_def.h
@@ -105,6 +105,43 @@ struct MES_API_STATUS {
 	uint64_t api_completion_fence_value;
 };
 
+/*
+ * MES will set api_completion_fence_value in api_completion_fence_addr
+ * when it can successflly process the API. MES will also trigger
+ * following interrupt when it finish process the API no matter success
+ * or failed.
+ *     Interrupt source id 181 (EOP) with context ID (DW 6 in the int
+ *     cookie) set to 0xb1 and context type set to 8. Driver side need
+ *     to enable TIME_STAMP_INT_ENABLE in CPC_INT_CNTL for MES pipe to
+ *     catch this interrupt.
+ *     Driver side also need to set enable_mes_fence_int = 1 in
+ *     set_HW_resource package to enable this fence interrupt.
+ * when the API process failed.
+ *     lowre 32 bits set to 0.
+ *     higher 32 bits set as follows (bit shift within high 32)
+ *         bit 0  -  7    API specific error code.
+ *         bit 8  - 15    API OPCODE.
+ *         bit 16 - 23    MISC OPCODE if any
+ *         bit 24 - 30    ERROR category (API_ERROR_XXX)
+ *         bit 31         Set to 1 to indicate error status
+ *
+ */
+enum { MES_SCH_ERROR_CODE_HEADER_SHIFT_12 = 8 };
+enum { MES_SCH_ERROR_CODE_MISC_OP_SHIFT_12 = 16 };
+enum { MES_ERROR_CATEGORY_SHIFT_12 = 24 };
+enum { MES_API_STATUS_ERROR_SHIFT_12 = 31 };
+
+enum MES_ERROR_CATEGORY_CODE_12 {
+	MES_ERROR_API                = 1,
+	MES_ERROR_SCHEDULING         = 2,
+	MES_ERROR_UNKNOWN            = 3,
+};
+
+#define MES_ERR_CODE(api_err, opcode, misc_op, category) \
+			((uint64) (api_err | opcode << MES_SCH_ERROR_CODE_HEADER_SHIFT_12 | \
+			misc_op << MES_SCH_ERROR_CODE_MISC_OP_SHIFT_12 | \
+			category << MES_ERROR_CATEGORY_SHIFT_12 | \
+			1 << MES_API_STATUS_ERROR_SHIFT_12) << 32)
 
 enum { MAX_COMPUTE_PIPES = 8 };
 enum { MAX_GFX_PIPES	 = 2 };
@@ -248,7 +285,9 @@ union MESAPI_SET_HW_RESOURCES {
 				uint32_t enable_mes_sch_stb_log : 1;
 				uint32_t limit_single_process : 1;
 				uint32_t unmapped_doorbell_handling: 2;
-				uint32_t reserved : 11;
+				uint32_t enable_mes_fence_int: 1;
+				uint32_t enable_lr_compute_wa : 1;
+				uint32_t reserved : 9;
 			};
 			uint32_t uint32_all;
 		};
@@ -278,6 +317,8 @@ union MESAPI_SET_HW_RESOURCES_1 {
 		uint32_t                            mes_debug_ctx_size;
 		/* unit is 100ms */
 		uint32_t                            mes_kiq_unmap_timeout;
+		uint64_t                            reserved1;
+		uint64_t                            cleaner_shader_fence_mc_addr;
 	};
 
 	uint32_t max_dwords_in_api[API_FRAME_SIZE_IN_DWORDS];
@@ -643,6 +684,10 @@ enum MESAPI_MISC_OPCODE {
 	MESAPI_MISC__SET_SHADER_DEBUGGER,
 	MESAPI_MISC__NOTIFY_WORK_ON_UNMAPPED_QUEUE,
 	MESAPI_MISC__NOTIFY_TO_UNMAP_PROCESSES,
+	MESAPI_MISC__QUERY_HUNG_ENGINE_ID,
+	MESAPI_MISC__CHANGE_CONFIG,
+	MESAPI_MISC__LAUNCH_CLEANER_SHADER,
+	MESAPI_MISC__SETUP_MES_DBGEXT,
 
 	MESAPI_MISC__MAX,
 };
@@ -713,6 +758,31 @@ struct SET_GANG_SUBMIT {
 	uint32_t slave_gang_context_array_index;
 };
 
+enum MESAPI_MISC__CHANGE_CONFIG_OPTION {
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_LIMIT_SINGLE_PROCESS = 0,
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_ENABLE_HWS_LOGGING_BUFFER = 1,
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_CHANGE_TDR_CONFIG    = 2,
+
+	MESAPI_MISC__CHANGE_CONFIG_OPTION_MAX = 0x1F
+};
+
+struct CHANGE_CONFIG {
+	enum MESAPI_MISC__CHANGE_CONFIG_OPTION opcode;
+	union {
+		struct  {
+			uint32_t limit_single_process : 1;
+			uint32_t enable_hws_logging_buffer : 1;
+			uint32_t reserved : 30;
+		} bits;
+		uint32_t all;
+	} option;
+
+	struct {
+		uint32_t tdr_level;
+		uint32_t tdr_delay;
+	} tdr_config;
+};
+
 union MESAPI__MISC {
 	struct {
 		union MES_API_HEADER	header;
@@ -726,7 +796,7 @@ union MESAPI__MISC {
 			struct WAIT_REG_MEM wait_reg_mem;
 			struct SET_SHADER_DEBUGGER set_shader_debugger;
 			enum MES_AMD_PRIORITY_LEVEL queue_sch_level;
-
+			struct CHANGE_CONFIG change_config;
 			uint32_t data[MISC_DATA_MAX_SIZE_IN_DWORDS];
 		};
 		uint64_t		timestamp;
diff --git a/drivers/hid/hid-mcp2221.c b/drivers/hid/hid-mcp2221.c
index 0f93c22a479f..83941b916cd6 100644
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -814,6 +814,10 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 			}
 			if (data[2] == MCP2221_I2C_READ_COMPL ||
 			    data[2] == MCP2221_I2C_READ_PARTIAL) {
+				if (!mcp->rxbuf || mcp->rxbuf_idx < 0 || data[3] > 60) {
+					mcp->status = -EINVAL;
+					break;
+				}
 				buf = mcp->rxbuf;
 				memcpy(&buf[mcp->rxbuf_idx], &data[4], data[3]);
 				mcp->rxbuf_idx = mcp->rxbuf_idx + data[3];
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 450e1a7e7bac..444cf35feebf 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -133,7 +133,7 @@ struct journal_sector {
 	commit_id_t commit_id;
 };
 
-#define MAX_TAG_SIZE			(JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
+#define MAX_TAG_SIZE			255
 
 #define METADATA_PADDING_SECTORS	8
 
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index d1306f39fa13..6a023fe22635 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -2189,10 +2189,10 @@ static int tc358743_probe(struct i2c_client *client)
 err_work_queues:
 	cec_unregister_adapter(state->cec_adap);
 	if (!state->i2c_client->irq) {
-		del_timer(&state->timer);
+		timer_delete_sync(&state->timer);
 		flush_work(&state->work_i2c_poll);
 	}
-	cancel_delayed_work(&state->delayed_work_enable_hotplug);
+	cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
 	mutex_destroy(&state->confctl_mutex);
 err_hdl:
 	media_entity_cleanup(&sd->entity);
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index aa3df0d05b85..24dd15c91722 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -732,9 +732,6 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 	/* Reset Global error flags */
 	rcar_canfd_write(gpriv->base, RCANFD_GERFL, 0x0);
 
-	/* Set the controller into appropriate mode */
-	rcar_canfd_set_mode(gpriv);
-
 	/* Transition all Channels to reset mode */
 	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_clear_bit(gpriv->base,
@@ -754,6 +751,10 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 			return err;
 		}
 	}
+
+	/* Set the controller into appropriate mode */
+	rcar_canfd_set_mode(gpriv);
+
 	return 0;
 }
 
diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index ff39afc77d7d..c9eba1d37b0e 100644
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -545,8 +545,6 @@ static int hi3110_stop(struct net_device *net)
 
 	priv->force_quit = 1;
 	free_irq(spi->irq, priv);
-	destroy_workqueue(priv->wq);
-	priv->wq = NULL;
 
 	mutex_lock(&priv->hi3110_lock);
 
@@ -771,34 +769,23 @@ static int hi3110_open(struct net_device *net)
 		goto out_close;
 	}
 
-	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
-				   0);
-	if (!priv->wq) {
-		ret = -ENOMEM;
-		goto out_free_irq;
-	}
-	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
-	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
-
 	ret = hi3110_hw_reset(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_setup(net);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_set_normal_mode(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	netif_wake_queue(net);
 	mutex_unlock(&priv->hi3110_lock);
 
 	return 0;
 
- out_free_wq:
-	destroy_workqueue(priv->wq);
  out_free_irq:
 	free_irq(spi->irq, priv);
 	hi3110_hw_sleep(spi);
@@ -910,6 +897,15 @@ static int hi3110_can_probe(struct spi_device *spi)
 	if (ret)
 		goto out_clk;
 
+	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
+				   0);
+	if (!priv->wq) {
+		ret = -ENOMEM;
+		goto out_clk;
+	}
+	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
+	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
+
 	priv->spi = spi;
 	mutex_init(&priv->hi3110_lock);
 
@@ -945,6 +941,8 @@ static int hi3110_can_probe(struct spi_device *spi)
 	return 0;
 
  error_probe:
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
 	hi3110_power_enable(priv->power, 0);
 
  out_clk:
@@ -965,6 +963,9 @@ static void hi3110_can_remove(struct spi_device *spi)
 
 	hi3110_power_enable(priv->power, 0);
 
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
+
 	clk_disable_unprepare(priv->clk);
 
 	free_candev(net);
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index c6f69d87c38d..d07f0f75d23f 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -8170,8 +8170,6 @@ static const struct usb_device_id dev_table[] = {
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x06f8, 0xe033, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
-{USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8188, 0xff, 0xff, 0xff),
-	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x07b8, 0x8189, 0xff, 0xff, 0xff),
 	.driver_info = (unsigned long)&rtl8192cu_fops},
 {USB_DEVICE_AND_INTERFACE_INFO(0x0846, 0x9041, 0xff, 0xff, 0xff),
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
index c9b9e2bc90cc..1d75d8ec0016 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
@@ -291,7 +291,6 @@ static const struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x050d, 0x1102, rtl92cu_hal_cfg)}, /*Belkin - Edimax*/
 	{RTL_USB_DEVICE(0x050d, 0x11f2, rtl92cu_hal_cfg)}, /*Belkin - ISY*/
 	{RTL_USB_DEVICE(0x06f8, 0xe033, rtl92cu_hal_cfg)}, /*Hercules - Edimax*/
-	{RTL_USB_DEVICE(0x07b8, 0x8188, rtl92cu_hal_cfg)}, /*Abocom - Abocom*/
 	{RTL_USB_DEVICE(0x07b8, 0x8189, rtl92cu_hal_cfg)}, /*Funai - Abocom*/
 	{RTL_USB_DEVICE(0x0846, 0x9041, rtl92cu_hal_cfg)}, /*NetGear WNA1000M*/
 	{RTL_USB_DEVICE(0x0846, 0x9043, rtl92cu_hal_cfg)}, /*NG WNA1000Mv2*/
diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index c336c66ac8e3..99711a4fb85d 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -960,6 +960,14 @@ rtw89_core_tx_update_desc_info(struct rtw89_dev *rtwdev,
 	}
 }
 
+static void rtw89_tx_wait_work(struct wiphy *wiphy, struct wiphy_work *work)
+{
+	struct rtw89_dev *rtwdev = container_of(work, struct rtw89_dev,
+						tx_wait_work.work);
+
+	rtw89_tx_wait_list_clear(rtwdev);
+}
+
 void rtw89_core_tx_kick_off(struct rtw89_dev *rtwdev, u8 qsel)
 {
 	u8 ch_dma;
@@ -977,6 +985,8 @@ int rtw89_core_tx_kick_off_and_wait(struct rtw89_dev *rtwdev, struct sk_buff *sk
 	unsigned long time_left;
 	int ret = 0;
 
+	lockdep_assert_wiphy(rtwdev->hw->wiphy);
+
 	wait = kzalloc(sizeof(*wait), GFP_KERNEL);
 	if (!wait) {
 		rtw89_core_tx_kick_off(rtwdev, qsel);
@@ -984,18 +994,23 @@ int rtw89_core_tx_kick_off_and_wait(struct rtw89_dev *rtwdev, struct sk_buff *sk
 	}
 
 	init_completion(&wait->completion);
+	wait->skb = skb;
 	rcu_assign_pointer(skb_data->wait, wait);
 
 	rtw89_core_tx_kick_off(rtwdev, qsel);
 	time_left = wait_for_completion_timeout(&wait->completion,
 						msecs_to_jiffies(timeout));
-	if (time_left == 0)
-		ret = -ETIMEDOUT;
-	else if (!wait->tx_done)
-		ret = -EAGAIN;
 
-	rcu_assign_pointer(skb_data->wait, NULL);
-	kfree_rcu(wait, rcu_head);
+	if (time_left == 0) {
+		ret = -ETIMEDOUT;
+		list_add_tail(&wait->list, &rtwdev->tx_waits);
+		wiphy_delayed_work_queue(rtwdev->hw->wiphy, &rtwdev->tx_wait_work,
+					 RTW89_TX_WAIT_WORK_TIMEOUT);
+	} else {
+		if (!wait->tx_done)
+			ret = -EAGAIN;
+		rtw89_tx_wait_release(wait);
+	}
 
 	return ret;
 }
@@ -4419,6 +4434,7 @@ int rtw89_core_start(struct rtw89_dev *rtwdev)
 void rtw89_core_stop(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc *btc = &rtwdev->btc;
+	struct wiphy *wiphy = rtwdev->hw->wiphy;
 
 	/* Prvent to stop twice; enter_ips and ops_stop */
 	if (!test_bit(RTW89_FLAG_RUNNING, rtwdev->flags))
@@ -4437,6 +4453,7 @@ void rtw89_core_stop(struct rtw89_dev *rtwdev)
 	cancel_work_sync(&btc->dhcp_notify_work);
 	cancel_work_sync(&btc->icmp_notify_work);
 	cancel_delayed_work_sync(&rtwdev->txq_reinvoke_work);
+	wiphy_delayed_work_cancel(wiphy, &rtwdev->tx_wait_work);
 	cancel_delayed_work_sync(&rtwdev->track_work);
 	cancel_delayed_work_sync(&rtwdev->chanctx_work);
 	cancel_delayed_work_sync(&rtwdev->coex_act1_work);
@@ -4657,6 +4674,7 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 			continue;
 		INIT_LIST_HEAD(&rtwdev->scan_info.pkt_list[band]);
 	}
+	INIT_LIST_HEAD(&rtwdev->tx_waits);
 	INIT_WORK(&rtwdev->ba_work, rtw89_core_ba_work);
 	INIT_WORK(&rtwdev->txq_work, rtw89_core_txq_work);
 	INIT_DELAYED_WORK(&rtwdev->txq_reinvoke_work, rtw89_core_txq_reinvoke_work);
@@ -4666,6 +4684,7 @@ int rtw89_core_init(struct rtw89_dev *rtwdev)
 	INIT_DELAYED_WORK(&rtwdev->coex_bt_devinfo_work, rtw89_coex_bt_devinfo_work);
 	INIT_DELAYED_WORK(&rtwdev->coex_rfk_chk_work, rtw89_coex_rfk_chk_work);
 	INIT_DELAYED_WORK(&rtwdev->cfo_track_work, rtw89_phy_cfo_track_work);
+	wiphy_delayed_work_init(&rtwdev->tx_wait_work, rtw89_tx_wait_work);
 	INIT_DELAYED_WORK(&rtwdev->forbid_ba_work, rtw89_forbid_ba_work);
 	INIT_DELAYED_WORK(&rtwdev->antdiv_work, rtw89_phy_antdiv_work);
 	rtwdev->txq_wq = alloc_workqueue("rtw89_tx_wq", WQ_UNBOUND | WQ_HIGHPRI, 0);
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 4f64ea392e6c..cb703588e3a4 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -3406,9 +3406,12 @@ struct rtw89_phy_rate_pattern {
 	bool enable;
 };
 
+#define RTW89_TX_WAIT_WORK_TIMEOUT msecs_to_jiffies(500)
 struct rtw89_tx_wait_info {
 	struct rcu_head rcu_head;
+	struct list_head list;
 	struct completion completion;
+	struct sk_buff *skb;
 	bool tx_done;
 };
 
@@ -5539,6 +5542,9 @@ struct rtw89_dev {
 	/* used to protect rpwm */
 	spinlock_t rpwm_lock;
 
+	struct list_head tx_waits;
+	struct wiphy_delayed_work tx_wait_work;
+
 	struct rtw89_cam_info cam_info;
 
 	struct sk_buff_head c2h_queue;
@@ -5735,6 +5741,26 @@ u8 rtw89_sta_link_inst_get_index(struct rtw89_sta_link *rtwsta_link)
 	return rtwsta_link - rtwsta->links_inst;
 }
 
+static inline void rtw89_tx_wait_release(struct rtw89_tx_wait_info *wait)
+{
+	dev_kfree_skb_any(wait->skb);
+	kfree_rcu(wait, rcu_head);
+}
+
+static inline void rtw89_tx_wait_list_clear(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_tx_wait_info *wait, *tmp;
+
+	lockdep_assert_wiphy(rtwdev->hw->wiphy);
+
+	list_for_each_entry_safe(wait, tmp, &rtwdev->tx_waits, list) {
+		if (!completion_done(&wait->completion))
+			continue;
+		list_del(&wait->list);
+		rtw89_tx_wait_release(wait);
+	}
+}
+
 static inline int rtw89_hci_tx_write(struct rtw89_dev *rtwdev,
 				     struct rtw89_core_tx_request *tx_req)
 {
@@ -5744,6 +5770,7 @@ static inline int rtw89_hci_tx_write(struct rtw89_dev *rtwdev,
 static inline void rtw89_hci_reset(struct rtw89_dev *rtwdev)
 {
 	rtwdev->hci.ops->reset(rtwdev);
+	rtw89_tx_wait_list_clear(rtwdev);
 }
 
 static inline int rtw89_hci_start(struct rtw89_dev *rtwdev)
@@ -6745,11 +6772,12 @@ static inline struct sk_buff *rtw89_alloc_skb_for_rx(struct rtw89_dev *rtwdev,
 	return dev_alloc_skb(length);
 }
 
-static inline void rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
+static inline bool rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
 					       struct rtw89_tx_skb_data *skb_data,
 					       bool tx_done)
 {
 	struct rtw89_tx_wait_info *wait;
+	bool ret = false;
 
 	rcu_read_lock();
 
@@ -6757,11 +6785,14 @@ static inline void rtw89_core_tx_wait_complete(struct rtw89_dev *rtwdev,
 	if (!wait)
 		goto out;
 
+	ret = true;
 	wait->tx_done = tx_done;
-	complete(&wait->completion);
+	/* Don't access skb anymore after completion */
+	complete_all(&wait->completion);
 
 out:
 	rcu_read_unlock();
+	return ret;
 }
 
 static inline bool rtw89_is_mlo_1_1(struct rtw89_dev *rtwdev)
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index e203d3b2a827..5fd5fe88e6b0 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -458,7 +458,8 @@ static void rtw89_pci_tx_status(struct rtw89_dev *rtwdev,
 	struct rtw89_tx_skb_data *skb_data = RTW89_TX_SKB_CB(skb);
 	struct ieee80211_tx_info *info;
 
-	rtw89_core_tx_wait_complete(rtwdev, skb_data, tx_status == RTW89_TX_DONE);
+	if (rtw89_core_tx_wait_complete(rtwdev, skb_data, tx_status == RTW89_TX_DONE))
+		return;
 
 	info = IEEE80211_SKB_CB(skb);
 	ieee80211_tx_info_clear_status(info);
diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
index 02c2ac12f197..c0f0e3d71f5f 100644
--- a/drivers/net/wireless/realtek/rtw89/ser.c
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -484,6 +484,7 @@ static void ser_l1_reset_pre_st_hdl(struct rtw89_ser *ser, u8 evt)
 static void ser_reset_trx_st_hdl(struct rtw89_ser *ser, u8 evt)
 {
 	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+	struct wiphy *wiphy = rtwdev->hw->wiphy;
 
 	switch (evt) {
 	case SER_EV_STATE_IN:
@@ -496,7 +497,9 @@ static void ser_reset_trx_st_hdl(struct rtw89_ser *ser, u8 evt)
 		}
 
 		drv_stop_rx(ser);
+		wiphy_lock(wiphy);
 		drv_trx_reset(ser);
+		wiphy_unlock(wiphy);
 
 		/* wait m3 */
 		hal_send_m2_event(ser);
diff --git a/drivers/nvmem/layouts.c b/drivers/nvmem/layouts.c
index 65d39e19f6ec..f381ce1e84bd 100644
--- a/drivers/nvmem/layouts.c
+++ b/drivers/nvmem/layouts.c
@@ -45,11 +45,24 @@ static void nvmem_layout_bus_remove(struct device *dev)
 	return drv->remove(layout);
 }
 
+static int nvmem_layout_bus_uevent(const struct device *dev,
+				   struct kobj_uevent_env *env)
+{
+	int ret;
+
+	ret = of_device_uevent_modalias(dev, env);
+	if (ret != ENODEV)
+		return ret;
+
+	return 0;
+}
+
 static const struct bus_type nvmem_layout_bus_type = {
 	.name		= "nvmem-layout",
 	.match		= nvmem_layout_bus_match,
 	.probe		= nvmem_layout_bus_probe,
 	.remove		= nvmem_layout_bus_remove,
+	.uevent		= nvmem_layout_bus_uevent,
 };
 
 int __nvmem_layout_driver_register(struct nvmem_layout_driver *drv,
diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index 6f5437d210a6..9fd2829ee2ab 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -233,6 +233,14 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "WUJIE14-GX4HRXL"),
 		}
 	},
+	{
+		.ident = "MECHREVO Yilong15Pro Series GM5HG7A",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MECHREVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Yilong15Pro Series GM5HG7A"),
+		}
+	},
 	/* https://bugzilla.kernel.org/show_bug.cgi?id=220116 */
 	{
 		.ident = "PCSpecialist Lafite Pro V 14M",
@@ -242,6 +250,13 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Lafite Pro V 14M"),
 		}
 	},
+	{
+		.ident = "TUXEDO Stellaris Slim 15 AMD Gen6",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
+		}
+	},
 	{
 		.ident = "TUXEDO InfinityBook Pro 14/15 AMD Gen10",
 		.driver_data = &quirk_spurious_8042,
diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
index 719caa2a00f0..8a1e2268d301 100644
--- a/drivers/platform/x86/amd/pmf/core.c
+++ b/drivers/platform/x86/amd/pmf/core.c
@@ -406,6 +406,7 @@ static const struct acpi_device_id amd_pmf_acpi_ids[] = {
 	{"AMDI0103", 0},
 	{"AMDI0105", 0},
 	{"AMDI0107", 0},
+	{"AMDI0108", 0},
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, amd_pmf_acpi_ids);
diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c
index 6769f066b0b4..028ed5d0ecbe 100644
--- a/drivers/staging/axis-fifo/axis-fifo.c
+++ b/drivers/staging/axis-fifo/axis-fifo.c
@@ -42,7 +42,6 @@
 #define DRIVER_NAME "axis_fifo"
 
 #define READ_BUF_SIZE 128U /* read buffer length in words */
-#define WRITE_BUF_SIZE 128U /* write buffer length in words */
 
 /* ----------------------------
  *     IP register offsets
@@ -392,6 +391,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 	}
 
 	bytes_available = ioread32(fifo->base_addr + XLLF_RLR_OFFSET);
+	words_available = bytes_available / sizeof(u32);
 	if (!bytes_available) {
 		dev_err(fifo->dt_device, "received a packet of length 0\n");
 		ret = -EIO;
@@ -402,7 +402,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		dev_err(fifo->dt_device, "user read buffer too small (available bytes=%zu user buffer bytes=%zu)\n",
 			bytes_available, len);
 		ret = -EINVAL;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
 	if (bytes_available % sizeof(u32)) {
@@ -411,11 +411,9 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		 */
 		dev_err(fifo->dt_device, "received a packet that isn't word-aligned\n");
 		ret = -EIO;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
-	words_available = bytes_available / sizeof(u32);
-
 	/* read data into an intermediate buffer, copying the contents
 	 * to userspace when the buffer is full
 	 */
@@ -427,18 +425,23 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 			tmp_buf[i] = ioread32(fifo->base_addr +
 					      XLLF_RDFD_OFFSET);
 		}
+		words_available -= copy;
 
 		if (copy_to_user(buf + copied * sizeof(u32), tmp_buf,
 				 copy * sizeof(u32))) {
 			ret = -EFAULT;
-			goto end_unlock;
+			goto err_flush_rx;
 		}
 
 		copied += copy;
-		words_available -= copy;
 	}
+	mutex_unlock(&fifo->read_lock);
+
+	return bytes_available;
 
-	ret = bytes_available;
+err_flush_rx:
+	while (words_available--)
+		ioread32(fifo->base_addr + XLLF_RDFD_OFFSET);
 
 end_unlock:
 	mutex_unlock(&fifo->read_lock);
@@ -466,11 +469,8 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 {
 	struct axis_fifo *fifo = (struct axis_fifo *)f->private_data;
 	unsigned int words_to_write;
-	unsigned int copied;
-	unsigned int copy;
-	unsigned int i;
+	u32 *txbuf;
 	int ret;
-	u32 tmp_buf[WRITE_BUF_SIZE];
 
 	if (len % sizeof(u32)) {
 		dev_err(fifo->dt_device,
@@ -486,11 +486,17 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		return -EINVAL;
 	}
 
-	if (words_to_write > fifo->tx_fifo_depth) {
-		dev_err(fifo->dt_device, "tried to write more words [%u] than slots in the fifo buffer [%u]\n",
-			words_to_write, fifo->tx_fifo_depth);
+	/*
+	 * In 'Store-and-Forward' mode, the maximum packet that can be
+	 * transmitted is limited by the size of the FIFO, which is
+	 * (C_TX_FIFO_DEPTH–4)*(data interface width/8) bytes.
+	 *
+	 * Do not attempt to send a packet larger than 'tx_fifo_depth - 4',
+	 * otherwise a 'Transmit Packet Overrun Error' interrupt will be
+	 * raised, which requires a reset of the TX circuit to recover.
+	 */
+	if (words_to_write > (fifo->tx_fifo_depth - 4))
 		return -EINVAL;
-	}
 
 	if (fifo->write_flags & O_NONBLOCK) {
 		/*
@@ -529,32 +535,20 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		}
 	}
 
-	/* write data from an intermediate buffer into the fifo IP, refilling
-	 * the buffer with userspace data as needed
-	 */
-	copied = 0;
-	while (words_to_write > 0) {
-		copy = min(words_to_write, WRITE_BUF_SIZE);
-
-		if (copy_from_user(tmp_buf, buf + copied * sizeof(u32),
-				   copy * sizeof(u32))) {
-			ret = -EFAULT;
-			goto end_unlock;
-		}
-
-		for (i = 0; i < copy; i++)
-			iowrite32(tmp_buf[i], fifo->base_addr +
-				  XLLF_TDFD_OFFSET);
-
-		copied += copy;
-		words_to_write -= copy;
+	txbuf = vmemdup_user(buf, len);
+	if (IS_ERR(txbuf)) {
+		ret = PTR_ERR(txbuf);
+		goto end_unlock;
 	}
 
-	ret = copied * sizeof(u32);
+	for (int i = 0; i < words_to_write; ++i)
+		iowrite32(txbuf[i], fifo->base_addr + XLLF_TDFD_OFFSET);
 
 	/* write packet size to fifo */
-	iowrite32(ret, fifo->base_addr + XLLF_TLR_OFFSET);
+	iowrite32(len, fifo->base_addr + XLLF_TLR_OFFSET);
 
+	ret = len;
+	kvfree(txbuf);
 end_unlock:
 	mutex_unlock(&fifo->write_lock);
 
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 28e4beeabf8f..4fd789a77a13 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1401,7 +1401,7 @@ config SERIAL_STM32
 
 config SERIAL_STM32_CONSOLE
 	bool "Support for console on STM32"
-	depends on SERIAL_STM32=y
+	depends on SERIAL_STM32
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
 
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index fc869b7f803f..62e984d20e59 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2114,6 +2114,12 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE(0x1e0e, 0x9071),				/* Simcom SIM8230 RMNET mode */
+	  .driver_info = RSVD(3) | RSVD(4) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9078, 0xff),	/* Simcom SIM8230 ECM mode */
+	  .driver_info = RSVD(5) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x907b, 0xff),	/* Simcom SIM8230 RNDIS mode */
+	  .driver_info = RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index 2928abf7eb82..fc46190d26c8 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -998,11 +998,18 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
 	if (!btrfs_test_opt(fs_info, REF_VERIFY))
 		return 0;
 
+	extent_root = btrfs_extent_root(fs_info, 0);
+	/* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */
+	if (IS_ERR(extent_root)) {
+		btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling");
+		btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
+		return 0;
+	}
+
 	path = btrfs_alloc_path();
 	if (!path)
 		return -ENOMEM;
 
-	extent_root = btrfs_extent_root(fs_info, 0);
 	eb = btrfs_read_lock_root_node(extent_root);
 	level = btrfs_header_level(eb);
 	path->nodes[level] = eb;
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index 896d1d4219ed..be77a137cc87 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -340,7 +340,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
 		folio_put(folio);
 		ret = filemap_write_and_wait_range(mapping, fpos, fpos + flen - 1);
 		if (ret < 0)
-			goto error_folio_unlock;
+			goto out;
 		continue;
 
 	copied:
diff --git a/include/linux/device.h b/include/linux/device.h
index 39120b172992..1f6130e13620 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -873,6 +873,9 @@ static inline bool device_pm_not_required(struct device *dev)
 static inline void device_set_pm_not_required(struct device *dev)
 {
 	dev->power.no_pm = true;
+#ifdef CONFIG_PM
+	dev->power.no_callbacks = true;
+#endif
 }
 
 static inline void dev_pm_syscore_device(struct device *dev, bool val)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 791e4868f2d4..7e9d731c4597 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -725,10 +725,10 @@ static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req)
 	p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req);
 
 	spin_lock(&m->req_lock);
-	/* Ignore cancelled request if message has been received
-	 * before lock.
-	 */
-	if (req->status == REQ_STATUS_RCVD) {
+	/* Ignore cancelled request if status changed since the request was
+	 * processed in p9_client_flush()
+	*/
+	if (req->status != REQ_STATUS_SENT) {
 		spin_unlock(&m->req_lock);
 		return 0;
 	}
diff --git a/rust/kernel/block/mq/gen_disk.rs b/rust/kernel/block/mq/gen_disk.rs
index c6df153ebb88..8cd47ddd1dbb 100644
--- a/rust/kernel/block/mq/gen_disk.rs
+++ b/rust/kernel/block/mq/gen_disk.rs
@@ -3,7 +3,7 @@
 //! Generic disk abstraction.
 //!
 //! C header: [`include/linux/blkdev.h`](srctree/include/linux/blkdev.h)
-//! C header: [`include/linux/blk_mq.h`](srctree/include/linux/blk_mq.h)
+//! C header: [`include/linux/blk-mq.h`](srctree/include/linux/blk-mq.h)
 
 use crate::block::mq::{raw_writer::RawWriter, Operations, TagSet};
 use crate::{bindings, error::from_err_ptr, error::Result, sync::Arc};
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 854269fea875..aa0aa64202fe 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -135,7 +135,7 @@
 #define PDM_DMA_INTR_MASK       0x10000
 #define PDM_DEC_64              0x2
 #define PDM_CLK_FREQ_MASK       0x07
-#define PDM_MISC_CTRL_MASK      0x10
+#define PDM_MISC_CTRL_MASK      0x18
 #define PDM_ENABLE              0x01
 #define PDM_DISABLE             0x00
 #define DMA_EN_MASK             0x02
diff --git a/sound/soc/codecs/rt5682s.c b/sound/soc/codecs/rt5682s.c
index ce2e88e066f3..d773c96e2543 100644
--- a/sound/soc/codecs/rt5682s.c
+++ b/sound/soc/codecs/rt5682s.c
@@ -653,14 +653,15 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 	switch (mode) {
 	case SAR_PWR_SAVING:
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_3,
-			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_DIS);
+			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_EN);
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK,
-			RT5682S_CTRL_MB1_REG | RT5682S_CTRL_MB2_REG);
+			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK |
+			RT5682S_VREF_POW_MASK, RT5682S_CTRL_MB1_FSM |
+			RT5682S_CTRL_MB2_FSM | RT5682S_VREF_POW_FSM);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		usleep_range(5000, 5500);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK, RT5682S_SAR_BUTDET_EN);
@@ -688,7 +689,7 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		break;
 	default:
 		dev_err(component->dev, "Invalid SAR Power mode: %d\n", mode);
@@ -725,7 +726,7 @@ static void rt5682s_disable_push_button_irq(struct snd_soc_component *component)
 	snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 		RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 		RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-		RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+		RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 }
 
 /**
@@ -786,7 +787,7 @@ static int rt5682s_headset_detect(struct snd_soc_component *component, int jack_
 			jack_type = SND_JACK_HEADSET;
 			snd_soc_component_write(component, RT5682S_SAR_IL_CMD_3, 0x024c);
 			snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_EN);
+				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_DIS);
 			snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 				RT5682S_SAR_SEL_MB1_2_MASK, val << RT5682S_SAR_SEL_MB1_2_SFT);
 			rt5682s_enable_push_button_irq(component);
@@ -966,7 +967,7 @@ static int rt5682s_set_jack_detect(struct snd_soc_component *component,
 			RT5682S_EMB_JD_MASK | RT5682S_DET_TYPE |
 			RT5682S_POL_FAST_OFF_MASK | RT5682S_MIC_CAP_MASK,
 			RT5682S_EMB_JD_EN | RT5682S_DET_TYPE |
-			RT5682S_POL_FAST_OFF_HIGH | RT5682S_MIC_CAP_HS);
+			RT5682S_POL_FAST_OFF_LOW | RT5682S_MIC_CAP_HS);
 		regmap_update_bits(rt5682s->regmap, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_POW_MASK, RT5682S_SAR_POW_EN);
 		regmap_update_bits(rt5682s->regmap, RT5682S_GPIO_CTRL_1,
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index a792ada18863..461e183680da 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1522,12 +1522,12 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
 {
 	int i;
 
+	if (!umidi->disconnected)
+		snd_usbmidi_disconnect(&umidi->list);
+
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
-		if (ep->out)
-			snd_usbmidi_out_endpoint_delete(ep->out);
-		if (ep->in)
-			snd_usbmidi_in_endpoint_delete(ep->in);
+		kfree(ep->out);
 	}
 	mutex_destroy(&umidi->mutex);
 	kfree(umidi);
@@ -1553,7 +1553,7 @@ void snd_usbmidi_disconnect(struct list_head *p)
 	spin_unlock_irq(&umidi->disc_lock);
 	up_write(&umidi->disc_rwsem);
 
-	del_timer_sync(&umidi->error_timer);
+	timer_shutdown_sync(&umidi->error_timer);
 
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
index 9ef569492560..ddaeb4eb3e24 100644
--- a/tools/lib/subcmd/help.c
+++ b/tools/lib/subcmd/help.c
@@ -75,6 +75,9 @@ void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
 	size_t ci, cj, ei;
 	int cmp;
 
+	if (!excludes->cnt)
+		return;
+
 	ci = cj = ei = 0;
 	while (ci < cmds->cnt && ei < excludes->cnt) {
 		cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);

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Subject: Re: Linux 6.6.111
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diff --git a/Makefile b/Makefile
index 196343089737..9531c465e9c2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 110
+SUBLEVEL = 111
 EXTRAVERSION =
 NAME = Pinguïn Aangedreven
 
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index d0d836448a76..83827384982e 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -1873,13 +1873,17 @@ static void fpsimd_flush_cpu_state(void)
  */
 void fpsimd_save_and_flush_cpu_state(void)
 {
+	unsigned long flags;
+
 	if (!system_supports_fpsimd())
 		return;
 	WARN_ON(preemptible());
-	get_cpu_fpsimd_context();
+	local_irq_save(flags);
+	__get_cpu_fpsimd_context();
 	fpsimd_save();
 	fpsimd_flush_cpu_state();
-	put_cpu_fpsimd_context();
+	__put_cpu_fpsimd_context();
+	local_irq_restore(flags);
 }
 
 #ifdef CONFIG_KERNEL_MODE_NEON
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 4f6af8c6cfa0..4747277983ad 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -13,42 +13,19 @@
 
 #include <asm/ptrace.h>
 
-#ifdef CONFIG_64BIT
-#define DEFAULT_MAP_WINDOW	(UL(1) << (MMAP_VA_BITS - 1))
-#define STACK_TOP_MAX		TASK_SIZE
-
 #define arch_get_mmap_end(addr, len, flags)			\
 ({								\
-	unsigned long mmap_end;					\
-	typeof(addr) _addr = (addr);				\
-	if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && is_compat_task())) \
-		mmap_end = STACK_TOP_MAX;			\
-	else if ((_addr) >= VA_USER_SV57)			\
-		mmap_end = STACK_TOP_MAX;			\
-	else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= VA_BITS_SV48)) \
-		mmap_end = VA_USER_SV48;			\
-	else							\
-		mmap_end = VA_USER_SV39;			\
-	mmap_end;						\
+	STACK_TOP_MAX;						\
 })
 
 #define arch_get_mmap_base(addr, base)				\
 ({								\
-	unsigned long mmap_base;				\
-	typeof(addr) _addr = (addr);				\
-	typeof(base) _base = (base);				\
-	unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base);	\
-	if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && is_compat_task())) \
-		mmap_base = (_base);				\
-	else if (((_addr) >= VA_USER_SV57) && (VA_BITS >= VA_BITS_SV57)) \
-		mmap_base = VA_USER_SV57 - rnd_gap;		\
-	else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= VA_BITS_SV48)) \
-		mmap_base = VA_USER_SV48 - rnd_gap;		\
-	else							\
-		mmap_base = VA_USER_SV39 - rnd_gap;		\
-	mmap_base;						\
+	base;							\
 })
 
+#ifdef CONFIG_64BIT
+#define DEFAULT_MAP_WINDOW	(UL(1) << (MMAP_VA_BITS - 1))
+#define STACK_TOP_MAX		TASK_SIZE
 #else
 #define DEFAULT_MAP_WINDOW	TASK_SIZE
 #define STACK_TOP_MAX		TASK_SIZE
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2673cd5c46cb..313cb2ffd6aa 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5134,12 +5134,11 @@ void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 	ctxt->mem_read.end = 0;
 }
 
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts)
 {
 	const struct x86_emulate_ops *ops = ctxt->ops;
 	int rc = X86EMUL_CONTINUE;
 	int saved_dst_type = ctxt->dst.type;
-	bool is_guest_mode = ctxt->ops->is_guest_mode(ctxt);
 
 	ctxt->mem_read.pos = 0;
 
@@ -5187,7 +5186,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				fetch_possible_mmx_operand(&ctxt->dst);
 		}
 
-		if (unlikely(is_guest_mode) && ctxt->intercept) {
+		if (unlikely(check_intercepts) && ctxt->intercept) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_PRE_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5216,7 +5215,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 				goto done;
 		}
 
-		if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+		if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 			rc = emulator_check_intercept(ctxt, ctxt->intercept,
 						      X86_ICPT_POST_EXCEPT);
 			if (rc != X86EMUL_CONTINUE)
@@ -5270,7 +5269,7 @@ int x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 
 special_insn:
 
-	if (unlikely(is_guest_mode) && (ctxt->d & Intercept)) {
+	if (unlikely(check_intercepts) && (ctxt->d & Intercept)) {
 		rc = emulator_check_intercept(ctxt, ctxt->intercept,
 					      X86_ICPT_POST_MEMACCESS);
 		if (rc != X86EMUL_CONTINUE)
diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h
index be7aeb9b8ea3..b940ee604bd8 100644
--- a/arch/x86/kvm/kvm_emulate.h
+++ b/arch/x86/kvm/kvm_emulate.h
@@ -220,7 +220,6 @@ struct x86_emulate_ops {
 	void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked);
 
 	bool (*is_smm)(struct x86_emulate_ctxt *ctxt);
-	bool (*is_guest_mode)(struct x86_emulate_ctxt *ctxt);
 	int (*leave_smm)(struct x86_emulate_ctxt *ctxt);
 	void (*triple_fault)(struct x86_emulate_ctxt *ctxt);
 	int (*set_xcr)(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr);
@@ -498,7 +497,7 @@ bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt);
 #define EMULATION_RESTART 1
 #define EMULATION_INTERCEPTED 2
 void init_decode_cache(struct x86_emulate_ctxt *ctxt);
-int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
+int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, bool check_intercepts);
 int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
 			 u16 tss_selector, int idt_index, int reason,
 			 bool has_error_code, u32 error_code);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7238686a49bb..71d60d4e991f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8308,11 +8308,6 @@ static bool emulator_is_smm(struct x86_emulate_ctxt *ctxt)
 	return is_smm(emul_to_vcpu(ctxt));
 }
 
-static bool emulator_is_guest_mode(struct x86_emulate_ctxt *ctxt)
-{
-	return is_guest_mode(emul_to_vcpu(ctxt));
-}
-
 #ifndef CONFIG_KVM_SMM
 static int emulator_leave_smm(struct x86_emulate_ctxt *ctxt)
 {
@@ -8379,7 +8374,6 @@ static const struct x86_emulate_ops emulate_ops = {
 	.guest_has_rdpid     = emulator_guest_has_rdpid,
 	.set_nmi_mask        = emulator_set_nmi_mask,
 	.is_smm              = emulator_is_smm,
-	.is_guest_mode       = emulator_is_guest_mode,
 	.leave_smm           = emulator_leave_smm,
 	.triple_fault        = emulator_triple_fault,
 	.set_xcr             = emulator_set_xcr,
@@ -8999,7 +8993,14 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 		ctxt->exception.address = 0;
 	}
 
-	r = x86_emulate_insn(ctxt);
+	/*
+	 * Check L1's instruction intercepts when emulating instructions for
+	 * L2, unless KVM is re-emulating a previously decoded instruction,
+	 * e.g. to complete userspace I/O, in which case KVM has already
+	 * checked the intercepts.
+	 */
+	r = x86_emulate_insn(ctxt, is_guest_mode(vcpu) &&
+				   !(emulation_type & EMULTYPE_NO_DECODE));
 
 	if (r == EMULATION_INTERCEPTED)
 		return 1;
diff --git a/crypto/rng.c b/crypto/rng.c
index 279dffdebf59..e462031fef68 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -197,6 +197,11 @@ int crypto_del_default_rng(void)
 EXPORT_SYMBOL_GPL(crypto_del_default_rng);
 #endif
 
+static void rng_default_set_ent(struct crypto_rng *tfm, const u8 *data,
+				unsigned int len)
+{
+}
+
 int crypto_register_rng(struct rng_alg *alg)
 {
 	struct crypto_istat_rng *istat = rng_get_stat(alg);
@@ -212,6 +217,9 @@ int crypto_register_rng(struct rng_alg *alg)
 	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
 		memset(istat, 0, sizeof(*istat));
 
+	if (!alg->set_ent)
+		alg->set_ent = rng_default_set_ent;
+
 	return crypto_register_alg(base);
 }
 EXPORT_SYMBOL_GPL(crypto_register_rng);
diff --git a/drivers/hid/hid-mcp2221.c b/drivers/hid/hid-mcp2221.c
index a985301a4135..d2d413c829f4 100644
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -814,6 +814,10 @@ static int mcp2221_raw_event(struct hid_device *hdev,
 			}
 			if (data[2] == MCP2221_I2C_READ_COMPL ||
 			    data[2] == MCP2221_I2C_READ_PARTIAL) {
+				if (!mcp->rxbuf || mcp->rxbuf_idx < 0 || data[3] > 60) {
+					mcp->status = -EINVAL;
+					break;
+				}
 				buf = mcp->rxbuf;
 				memcpy(&buf[mcp->rxbuf_idx], &data[4], data[3]);
 				mcp->rxbuf_idx = mcp->rxbuf_idx + data[3];
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 0bd76f8d4dc6..6442d41622ef 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -129,7 +129,7 @@ struct journal_sector {
 	commit_id_t commit_id;
 };
 
-#define MAX_TAG_SIZE			(JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
+#define MAX_TAG_SIZE			255
 
 #define METADATA_PADDING_SECTORS	8
 
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index 8a1a33862ba7..4b6ad85cf261 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -2180,10 +2180,10 @@ static int tc358743_probe(struct i2c_client *client)
 err_work_queues:
 	cec_unregister_adapter(state->cec_adap);
 	if (!state->i2c_client->irq) {
-		del_timer(&state->timer);
+		timer_delete_sync(&state->timer);
 		flush_work(&state->work_i2c_poll);
 	}
-	cancel_delayed_work(&state->delayed_work_enable_hotplug);
+	cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
 	mutex_destroy(&state->confctl_mutex);
 err_hdl:
 	media_entity_cleanup(&sd->entity);
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 2182e5b7b606..ec9a3cd4784e 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -58,7 +58,7 @@ struct xc5000_priv {
 	struct dvb_frontend *fe;
 	struct delayed_work timer_sleep;
 
-	const struct firmware   *firmware;
+	bool inited;
 };
 
 /* Misc Defines */
@@ -1110,23 +1110,19 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 	if (!force && xc5000_is_firmware_loaded(fe) == 0)
 		return 0;
 
-	if (!priv->firmware) {
-		ret = request_firmware(&fw, desired_fw->name,
-					priv->i2c_props.adap->dev.parent);
-		if (ret) {
-			pr_err("xc5000: Upload failed. rc %d\n", ret);
-			return ret;
-		}
-		dprintk(1, "firmware read %zu bytes.\n", fw->size);
+	ret = request_firmware(&fw, desired_fw->name,
+			       priv->i2c_props.adap->dev.parent);
+	if (ret) {
+		pr_err("xc5000: Upload failed. rc %d\n", ret);
+		return ret;
+	}
+	dprintk(1, "firmware read %zu bytes.\n", fw->size);
 
-		if (fw->size != desired_fw->size) {
-			pr_err("xc5000: Firmware file with incorrect size\n");
-			release_firmware(fw);
-			return -EINVAL;
-		}
-		priv->firmware = fw;
-	} else
-		fw = priv->firmware;
+	if (fw->size != desired_fw->size) {
+		pr_err("xc5000: Firmware file with incorrect size\n");
+		release_firmware(fw);
+		return -EINVAL;
+	}
 
 	/* Try up to 5 times to load firmware */
 	for (i = 0; i < 5; i++) {
@@ -1204,6 +1200,7 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
 	}
 
 err:
+	release_firmware(fw);
 	if (!ret)
 		printk(KERN_INFO "xc5000: Firmware %s loaded and running.\n",
 		       desired_fw->name);
@@ -1274,7 +1271,7 @@ static int xc5000_resume(struct dvb_frontend *fe)
 
 	/* suspended before firmware is loaded.
 	   Avoid firmware load in resume path. */
-	if (!priv->firmware)
+	if (!priv->inited)
 		return 0;
 
 	return xc5000_set_params(fe);
@@ -1293,6 +1290,8 @@ static int xc5000_init(struct dvb_frontend *fe)
 	if (debug)
 		xc_debug_dump(priv);
 
+	priv->inited = true;
+
 	return 0;
 }
 
@@ -1305,11 +1304,7 @@ static void xc5000_release(struct dvb_frontend *fe)
 	mutex_lock(&xc5000_list_mutex);
 
 	if (priv) {
-		cancel_delayed_work(&priv->timer_sleep);
-		if (priv->firmware) {
-			release_firmware(priv->firmware);
-			priv->firmware = NULL;
-		}
+		cancel_delayed_work_sync(&priv->timer_sleep);
 		hybrid_tuner_release_state(priv);
 	}
 
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index e501b55678d1..ae4ebcee6077 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -738,9 +738,6 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 	/* Reset Global error flags */
 	rcar_canfd_write(gpriv->base, RCANFD_GERFL, 0x0);
 
-	/* Set the controller into appropriate mode */
-	rcar_canfd_set_mode(gpriv);
-
 	/* Transition all Channels to reset mode */
 	for_each_set_bit(ch, &gpriv->channels_mask, gpriv->info->max_channels) {
 		rcar_canfd_clear_bit(gpriv->base,
@@ -760,6 +757,10 @@ static int rcar_canfd_reset_controller(struct rcar_canfd_global *gpriv)
 			return err;
 		}
 	}
+
+	/* Set the controller into appropriate mode */
+	rcar_canfd_set_mode(gpriv);
+
 	return 0;
 }
 
diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c
index 57ea7dfe8a59..1acd4fc7adc8 100644
--- a/drivers/net/can/spi/hi311x.c
+++ b/drivers/net/can/spi/hi311x.c
@@ -545,8 +545,6 @@ static int hi3110_stop(struct net_device *net)
 
 	priv->force_quit = 1;
 	free_irq(spi->irq, priv);
-	destroy_workqueue(priv->wq);
-	priv->wq = NULL;
 
 	mutex_lock(&priv->hi3110_lock);
 
@@ -771,34 +769,23 @@ static int hi3110_open(struct net_device *net)
 		goto out_close;
 	}
 
-	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
-				   0);
-	if (!priv->wq) {
-		ret = -ENOMEM;
-		goto out_free_irq;
-	}
-	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
-	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
-
 	ret = hi3110_hw_reset(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_setup(net);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	ret = hi3110_set_normal_mode(spi);
 	if (ret)
-		goto out_free_wq;
+		goto out_free_irq;
 
 	netif_wake_queue(net);
 	mutex_unlock(&priv->hi3110_lock);
 
 	return 0;
 
- out_free_wq:
-	destroy_workqueue(priv->wq);
  out_free_irq:
 	free_irq(spi->irq, priv);
 	hi3110_hw_sleep(spi);
@@ -915,6 +902,15 @@ static int hi3110_can_probe(struct spi_device *spi)
 	if (ret)
 		goto out_clk;
 
+	priv->wq = alloc_workqueue("hi3110_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM,
+				   0);
+	if (!priv->wq) {
+		ret = -ENOMEM;
+		goto out_clk;
+	}
+	INIT_WORK(&priv->tx_work, hi3110_tx_work_handler);
+	INIT_WORK(&priv->restart_work, hi3110_restart_work_handler);
+
 	priv->spi = spi;
 	mutex_init(&priv->hi3110_lock);
 
@@ -950,6 +946,8 @@ static int hi3110_can_probe(struct spi_device *spi)
 	return 0;
 
  error_probe:
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
 	hi3110_power_enable(priv->power, 0);
 
  out_clk:
@@ -970,6 +968,9 @@ static void hi3110_can_remove(struct spi_device *spi)
 
 	hi3110_power_enable(priv->power, 0);
 
+	destroy_workqueue(priv->wq);
+	priv->wq = NULL;
+
 	clk_disable_unprepare(priv->clk);
 
 	free_candev(net);
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
index e6403d4c937c..a0c0932a85d1 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c
@@ -294,7 +294,6 @@ static const struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(0x050d, 0x1102, rtl92cu_hal_cfg)}, /*Belkin - Edimax*/
 	{RTL_USB_DEVICE(0x050d, 0x11f2, rtl92cu_hal_cfg)}, /*Belkin - ISY*/
 	{RTL_USB_DEVICE(0x06f8, 0xe033, rtl92cu_hal_cfg)}, /*Hercules - Edimax*/
-	{RTL_USB_DEVICE(0x07b8, 0x8188, rtl92cu_hal_cfg)}, /*Abocom - Abocom*/
 	{RTL_USB_DEVICE(0x07b8, 0x8189, rtl92cu_hal_cfg)}, /*Funai - Abocom*/
 	{RTL_USB_DEVICE(0x0846, 0x9041, rtl92cu_hal_cfg)}, /*NetGear WNA1000M*/
 	{RTL_USB_DEVICE(0x0846, 0x9043, rtl92cu_hal_cfg)}, /*NG WNA1000Mv2*/
diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
index 6f5437d210a6..9fd2829ee2ab 100644
--- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
+++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
@@ -233,6 +233,14 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "WUJIE14-GX4HRXL"),
 		}
 	},
+	{
+		.ident = "MECHREVO Yilong15Pro Series GM5HG7A",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MECHREVO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Yilong15Pro Series GM5HG7A"),
+		}
+	},
 	/* https://bugzilla.kernel.org/show_bug.cgi?id=220116 */
 	{
 		.ident = "PCSpecialist Lafite Pro V 14M",
@@ -242,6 +250,13 @@ static const struct dmi_system_id fwbug_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Lafite Pro V 14M"),
 		}
 	},
+	{
+		.ident = "TUXEDO Stellaris Slim 15 AMD Gen6",
+		.driver_data = &quirk_spurious_8042,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
+		}
+	},
 	{
 		.ident = "TUXEDO InfinityBook Pro 14/15 AMD Gen10",
 		.driver_data = &quirk_spurious_8042,
diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c
index f667b3b62f18..4c38eeda53c4 100644
--- a/drivers/staging/axis-fifo/axis-fifo.c
+++ b/drivers/staging/axis-fifo/axis-fifo.c
@@ -42,7 +42,6 @@
 #define DRIVER_NAME "axis_fifo"
 
 #define READ_BUF_SIZE 128U /* read buffer length in words */
-#define WRITE_BUF_SIZE 128U /* write buffer length in words */
 
 /* ----------------------------
  *     IP register offsets
@@ -397,6 +396,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 	}
 
 	bytes_available = ioread32(fifo->base_addr + XLLF_RLR_OFFSET);
+	words_available = bytes_available / sizeof(u32);
 	if (!bytes_available) {
 		dev_err(fifo->dt_device, "received a packet of length 0\n");
 		ret = -EIO;
@@ -407,7 +407,7 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		dev_err(fifo->dt_device, "user read buffer too small (available bytes=%zu user buffer bytes=%zu)\n",
 			bytes_available, len);
 		ret = -EINVAL;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
 	if (bytes_available % sizeof(u32)) {
@@ -416,11 +416,9 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 		 */
 		dev_err(fifo->dt_device, "received a packet that isn't word-aligned\n");
 		ret = -EIO;
-		goto end_unlock;
+		goto err_flush_rx;
 	}
 
-	words_available = bytes_available / sizeof(u32);
-
 	/* read data into an intermediate buffer, copying the contents
 	 * to userspace when the buffer is full
 	 */
@@ -432,18 +430,23 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf,
 			tmp_buf[i] = ioread32(fifo->base_addr +
 					      XLLF_RDFD_OFFSET);
 		}
+		words_available -= copy;
 
 		if (copy_to_user(buf + copied * sizeof(u32), tmp_buf,
 				 copy * sizeof(u32))) {
 			ret = -EFAULT;
-			goto end_unlock;
+			goto err_flush_rx;
 		}
 
 		copied += copy;
-		words_available -= copy;
 	}
+	mutex_unlock(&fifo->read_lock);
+
+	return bytes_available;
 
-	ret = bytes_available;
+err_flush_rx:
+	while (words_available--)
+		ioread32(fifo->base_addr + XLLF_RDFD_OFFSET);
 
 end_unlock:
 	mutex_unlock(&fifo->read_lock);
@@ -471,11 +474,8 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 {
 	struct axis_fifo *fifo = (struct axis_fifo *)f->private_data;
 	unsigned int words_to_write;
-	unsigned int copied;
-	unsigned int copy;
-	unsigned int i;
+	u32 *txbuf;
 	int ret;
-	u32 tmp_buf[WRITE_BUF_SIZE];
 
 	if (len % sizeof(u32)) {
 		dev_err(fifo->dt_device,
@@ -491,11 +491,17 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		return -EINVAL;
 	}
 
-	if (words_to_write > fifo->tx_fifo_depth) {
-		dev_err(fifo->dt_device, "tried to write more words [%u] than slots in the fifo buffer [%u]\n",
-			words_to_write, fifo->tx_fifo_depth);
+	/*
+	 * In 'Store-and-Forward' mode, the maximum packet that can be
+	 * transmitted is limited by the size of the FIFO, which is
+	 * (C_TX_FIFO_DEPTH–4)*(data interface width/8) bytes.
+	 *
+	 * Do not attempt to send a packet larger than 'tx_fifo_depth - 4',
+	 * otherwise a 'Transmit Packet Overrun Error' interrupt will be
+	 * raised, which requires a reset of the TX circuit to recover.
+	 */
+	if (words_to_write > (fifo->tx_fifo_depth - 4))
 		return -EINVAL;
-	}
 
 	if (fifo->write_flags & O_NONBLOCK) {
 		/*
@@ -534,32 +540,20 @@ static ssize_t axis_fifo_write(struct file *f, const char __user *buf,
 		}
 	}
 
-	/* write data from an intermediate buffer into the fifo IP, refilling
-	 * the buffer with userspace data as needed
-	 */
-	copied = 0;
-	while (words_to_write > 0) {
-		copy = min(words_to_write, WRITE_BUF_SIZE);
-
-		if (copy_from_user(tmp_buf, buf + copied * sizeof(u32),
-				   copy * sizeof(u32))) {
-			ret = -EFAULT;
-			goto end_unlock;
-		}
-
-		for (i = 0; i < copy; i++)
-			iowrite32(tmp_buf[i], fifo->base_addr +
-				  XLLF_TDFD_OFFSET);
-
-		copied += copy;
-		words_to_write -= copy;
+	txbuf = vmemdup_user(buf, len);
+	if (IS_ERR(txbuf)) {
+		ret = PTR_ERR(txbuf);
+		goto end_unlock;
 	}
 
-	ret = copied * sizeof(u32);
+	for (int i = 0; i < words_to_write; ++i)
+		iowrite32(txbuf[i], fifo->base_addr + XLLF_TDFD_OFFSET);
 
 	/* write packet size to fifo */
-	iowrite32(ret, fifo->base_addr + XLLF_TLR_OFFSET);
+	iowrite32(len, fifo->base_addr + XLLF_TLR_OFFSET);
 
+	ret = len;
+	kvfree(txbuf);
 end_unlock:
 	mutex_unlock(&fifo->write_lock);
 
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index bdc568a4ab66..4f57833e3ec7 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1405,7 +1405,7 @@ config SERIAL_STM32
 
 config SERIAL_STM32_CONSOLE
 	bool "Support for console on STM32"
-	depends on SERIAL_STM32=y
+	depends on SERIAL_STM32
 	select SERIAL_CORE_CONSOLE
 	select SERIAL_EARLYCON
 
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index ef546f660b99..dca610369ca9 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2114,6 +2114,12 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE(0x1e0e, 0x9071),				/* Simcom SIM8230 RMNET mode */
+	  .driver_info = RSVD(3) | RSVD(4) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9078, 0xff),	/* Simcom SIM8230 ECM mode */
+	  .driver_info = RSVD(5) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x907b, 0xff),	/* Simcom SIM8230 RNDIS mode */
+	  .driver_info = RSVD(5) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index 28ac7995716e..b8122582d755 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -990,11 +990,18 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
 	if (!btrfs_test_opt(fs_info, REF_VERIFY))
 		return 0;
 
+	extent_root = btrfs_extent_root(fs_info, 0);
+	/* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */
+	if (IS_ERR(extent_root)) {
+		btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling");
+		btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
+		return 0;
+	}
+
 	path = btrfs_alloc_path();
 	if (!path)
 		return -ENOMEM;
 
-	extent_root = btrfs_extent_root(fs_info, 0);
 	eb = btrfs_read_lock_root_node(extent_root);
 	level = btrfs_header_level(eb);
 	path->nodes[level] = eb;
diff --git a/include/linux/device.h b/include/linux/device.h
index 3627b26b243e..e5f1a773dc54 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -968,6 +968,9 @@ static inline bool device_pm_not_required(struct device *dev)
 static inline void device_set_pm_not_required(struct device *dev)
 {
 	dev->power.no_pm = true;
+#ifdef CONFIG_PM
+	dev->power.no_callbacks = true;
+#endif
 }
 
 static inline void dev_pm_syscore_device(struct device *dev, bool val)
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index d0eb03ada704..a1e3cb48621a 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -719,10 +719,10 @@ static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req)
 	p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req);
 
 	spin_lock(&m->req_lock);
-	/* Ignore cancelled request if message has been received
-	 * before lock.
-	 */
-	if (req->status == REQ_STATUS_RCVD) {
+	/* Ignore cancelled request if status changed since the request was
+	 * processed in p9_client_flush()
+	*/
+	if (req->status != REQ_STATUS_SENT) {
 		spin_unlock(&m->req_lock);
 		return 0;
 	}
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index d6cfae6ec5f7..3f1761755b86 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -116,7 +116,7 @@
 #define PDM_DMA_INTR_MASK       0x10000
 #define PDM_DEC_64              0x2
 #define PDM_CLK_FREQ_MASK       0x07
-#define PDM_MISC_CTRL_MASK      0x10
+#define PDM_MISC_CTRL_MASK      0x18
 #define PDM_ENABLE              0x01
 #define PDM_DISABLE             0x00
 #define DMA_EN_MASK             0x02
diff --git a/sound/soc/codecs/rt5682s.c b/sound/soc/codecs/rt5682s.c
index 92c647d439ec..89de427c19e7 100644
--- a/sound/soc/codecs/rt5682s.c
+++ b/sound/soc/codecs/rt5682s.c
@@ -653,14 +653,15 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 	switch (mode) {
 	case SAR_PWR_SAVING:
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_3,
-			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_DIS);
+			RT5682S_CBJ_IN_BUF_MASK, RT5682S_CBJ_IN_BUF_EN);
 		snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK,
-			RT5682S_CTRL_MB1_REG | RT5682S_CTRL_MB2_REG);
+			RT5682S_MB1_PATH_MASK | RT5682S_MB2_PATH_MASK |
+			RT5682S_VREF_POW_MASK, RT5682S_CTRL_MB1_FSM |
+			RT5682S_CTRL_MB2_FSM | RT5682S_VREF_POW_FSM);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		usleep_range(5000, 5500);
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK, RT5682S_SAR_BUTDET_EN);
@@ -688,7 +689,7 @@ static void rt5682s_sar_power_mode(struct snd_soc_component *component, int mode
 		snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 			RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-			RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+			RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 		break;
 	default:
 		dev_err(component->dev, "Invalid SAR Power mode: %d\n", mode);
@@ -725,7 +726,7 @@ static void rt5682s_disable_push_button_irq(struct snd_soc_component *component)
 	snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 		RT5682S_SAR_BUTDET_MASK | RT5682S_SAR_BUTDET_POW_MASK |
 		RT5682S_SAR_SEL_MB1_2_CTL_MASK, RT5682S_SAR_BUTDET_DIS |
-		RT5682S_SAR_BUTDET_POW_SAV | RT5682S_SAR_SEL_MB1_2_MANU);
+		RT5682S_SAR_BUTDET_POW_NORM | RT5682S_SAR_SEL_MB1_2_MANU);
 }
 
 /**
@@ -786,7 +787,7 @@ static int rt5682s_headset_detect(struct snd_soc_component *component, int jack_
 			jack_type = SND_JACK_HEADSET;
 			snd_soc_component_write(component, RT5682S_SAR_IL_CMD_3, 0x024c);
 			snd_soc_component_update_bits(component, RT5682S_CBJ_CTRL_1,
-				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_EN);
+				RT5682S_FAST_OFF_MASK, RT5682S_FAST_OFF_DIS);
 			snd_soc_component_update_bits(component, RT5682S_SAR_IL_CMD_1,
 				RT5682S_SAR_SEL_MB1_2_MASK, val << RT5682S_SAR_SEL_MB1_2_SFT);
 			rt5682s_enable_push_button_irq(component);
@@ -966,7 +967,7 @@ static int rt5682s_set_jack_detect(struct snd_soc_component *component,
 			RT5682S_EMB_JD_MASK | RT5682S_DET_TYPE |
 			RT5682S_POL_FAST_OFF_MASK | RT5682S_MIC_CAP_MASK,
 			RT5682S_EMB_JD_EN | RT5682S_DET_TYPE |
-			RT5682S_POL_FAST_OFF_HIGH | RT5682S_MIC_CAP_HS);
+			RT5682S_POL_FAST_OFF_LOW | RT5682S_MIC_CAP_HS);
 		regmap_update_bits(rt5682s->regmap, RT5682S_SAR_IL_CMD_1,
 			RT5682S_SAR_POW_MASK, RT5682S_SAR_POW_EN);
 		regmap_update_bits(rt5682s->regmap, RT5682S_GPIO_CTRL_1,
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index 3059f814eb5c..fdf69917d19c 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1522,12 +1522,12 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
 {
 	int i;
 
+	if (!umidi->disconnected)
+		snd_usbmidi_disconnect(&umidi->list);
+
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
-		if (ep->out)
-			snd_usbmidi_out_endpoint_delete(ep->out);
-		if (ep->in)
-			snd_usbmidi_in_endpoint_delete(ep->in);
+		kfree(ep->out);
 	}
 	mutex_destroy(&umidi->mutex);
 	kfree(umidi);
@@ -1553,7 +1553,7 @@ void snd_usbmidi_disconnect(struct list_head *p)
 	spin_unlock_irq(&umidi->disc_lock);
 	up_write(&umidi->disc_rwsem);
 
-	del_timer_sync(&umidi->error_timer);
+	timer_shutdown_sync(&umidi->error_timer);
 
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
index 9ef569492560..ddaeb4eb3e24 100644
--- a/tools/lib/subcmd/help.c
+++ b/tools/lib/subcmd/help.c
@@ -75,6 +75,9 @@ void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
 	size_t ci, cj, ei;
 	int cmp;
 
+	if (!excludes->cnt)
+		return;
+
 	ci = cj = ei = 0;
 	while (ci < cmds->cnt && ei < excludes->cnt) {
 		cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);

From - Fri Oct 17 14:26:22 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.12.52
Date: Sun, 12 Oct 2025 13:19:44 +0200
DKIMCheck: Server passes DKIM test, 0 Spam score
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                              for more information.
                             [URIs: linuxfoundation.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
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SpamTally: Final spam score: 24

I'm announcing the release of the 6.12.52 kernel.

All users of the 6.12 kernel series must upgrade.

The updated 6.12.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.12.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                            |    2 
 arch/x86/kvm/emulate.c                              |    9 +-
 arch/x86/kvm/kvm_emulate.h                          |    3 
 arch/x86/kvm/x86.c                                  |   15 ++--
 crypto/rng.c                                        |    8 ++
 drivers/android/dbitmap.h                           |    1 
 drivers/bluetooth/btusb.c                           |    2 
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c              |    6 +
 drivers/gpu/drm/amd/amdgpu/mes_v12_0.c              |    5 +
 drivers/gpu/drm/amd/include/mes_v11_api_def.h       |   47 ++++++++++++
 drivers/gpu/drm/amd/include/mes_v12_api_def.h       |   74 +++++++++++++++++++-
 drivers/hid/hid-mcp2221.c                           |    4 +
 drivers/md/dm-integrity.c                           |    2 
 drivers/media/i2c/tc358743.c                        |    4 -
 drivers/net/can/rcar/rcar_canfd.c                   |    7 +
 drivers/net/can/spi/hi311x.c                        |   33 ++++----
 drivers/net/wireless/realtek/rtl8xxxu/core.c        |    2 
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c |    1 
 drivers/net/wireless/realtek/rtw89/core.c           |   31 ++++++--
 drivers/net/wireless/realtek/rtw89/core.h           |   35 ++++++++-
 drivers/net/wireless/realtek/rtw89/pci.c            |    3 
 drivers/net/wireless/realtek/rtw89/ser.c            |    3 
 drivers/nvmem/layouts.c                             |   13 +++
 drivers/platform/x86/amd/pmc/pmc-quirks.c           |   15 ++++
 drivers/platform/x86/amd/pmf/core.c                 |    1 
 drivers/staging/axis-fifo/axis-fifo.c               |   68 ++++++++----------
 drivers/tty/serial/Kconfig                          |    2 
 drivers/usb/serial/option.c                         |    6 +
 fs/btrfs/ref-verify.c                               |    9 ++
 fs/netfs/buffered_write.c                           |    2 
 include/linux/device.h                              |    3 
 net/9p/trans_fd.c                                   |    8 +-
 rust/kernel/block/mq/gen_disk.rs                    |    2 
 sound/soc/amd/acp/amd.h                             |    2 
 sound/soc/codecs/rt5682s.c                          |   17 ++--
 sound/usb/midi.c                                    |   10 +-
 tools/lib/subcmd/help.c                             |    3 
 37 files changed, 346 insertions(+), 112 deletions(-)

Arnaud Lecomte (1):
      hid: fix I2C read buffer overflow in raw_event() for mcp2221

Bitterblue Smith (2):
      wifi: rtlwifi: rtl8192cu: Don't claim USB ID 07b8:8188
      wifi: rtl8xxxu: Don't claim USB ID 07b8:8188

Carlos Llamas (1):
      binder: fix double-free in dbitmap

Chen Yufeng (1):
      can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled

Christoffer Sandberg (1):
      platform/x86/amd/pmc: Add Stellaris Slim Gen6 AMD to spurious 8042 quirks list

David Sterba (1):
      btrfs: ref-verify: handle damaged extent root tree

Duoming Zhou (1):
      media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe

Duy Nguyen (1):
      can: rcar_canfd: Fix controller mode setting

Fedor Pchelkin (1):
      wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()

Greg Kroah-Hartman (1):
      Linux 6.12.52

Herbert Xu (1):
      crypto: rng - Ensure set_ent is always present

Jack Yu (1):
      ASoC: rt5682s: Adjust SAR ADC button mode to fix noise issue

Jeongjun Park (1):
      ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

Lizhi Xu (1):
      netfs: Prevent duplicate unlocking

Mario Limonciello (1):
      drm/amdgpu: Enable MES lr_compute_wa by default

Michael Walle (1):
      nvmem: layouts: fix automatic module loading

Miguel Ojeda (1):
      rust: block: fix `srctree/` links

Mikulas Patocka (1):
      dm-integrity: limit MAX_TAG_SIZE to 255

Nalivayko Sergey (1):
      net/9p: fix double req put in p9_fd_cancelled

Ovidiu Panait (3):
      staging: axis-fifo: fix maximum TX packet length check
      staging: axis-fifo: fix TX handling on copy_from_user() failure
      staging: axis-fifo: flush RX FIFO on read errors

Rafael J. Wysocki (1):
      driver core/PM: Set power.no_callbacks along with power.no_pm

Raphael Gallais-Pou (1):
      serial: stm32: allow selecting console when the driver is module

Sean Christopherson (1):
      KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

Shaoyun Liu (3):
      drm/amd : Update MES API header file for v11 & v12
      drm/amd/include : MES v11 and v12 API header update
      drm/amd/include : Update MES v12 API for fence update

Shyam Sundar S K (1):
      platform/x86/amd/pmf: Support new ACPI ID AMDI0108

Takashi Iwai (1):
      ALSA: usb-audio: Kill timer properly at removal

Venkata Prasad Potturu (1):
      ASoC: amd: acp: Adjust pdm gain value

Xiaowei Li (1):
      USB: serial: option: add SIMCom 8230C compositions

Zenm Chen (1):
      Bluetooth: btusb: Add USB ID 2001:332a for D-Link AX9U rev. A1

aprilgrimoire (1):
      platform/x86/amd/pmc: Add MECHREVO Yilong15Pro to spurious_8042 list

hupu (1):
      perf subcmd: avoid crash in exclude_cmds when excludes is empty

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Date: Sun, 12 Oct 2025 12:34:08 +0900
From: Masami Hiramatsu (Google) <[email-masked]>
To: Steven Rostedt <[email-masked]>
Cc: [email-masked], [email-masked], Masami
 Hiramatsu <[email-masked]>, Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>, Andrew Morton
 <[email-masked]>, [email-masked],
 [email-masked]
Subject: Re: [PATCH 2/2] tracing: Stop fortify-string from warning in
 tracing_mark_raw_write()
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On Fri, 10 Oct 2025 23:51:43 -0400
Steven Rostedt <[email-masked]> wrote:

> From: Steven Rostedt <[email-masked]>
> 
> The way tracing_mark_raw_write() records its data is that it has the
> following structure:
> 
>   struct {
> 	struct trace_entry;
> 	int id;
> 	char dynamic_array[];
>   };
> 
> But memcpy(&entry->id, buf, size) triggers the following warning when the
> size is greater than the id:
> 
>  ------------[ cut here ]------------
>  memcpy: detected field-spanning write (size 6) of single field "&entry->id" at kernel/trace/trace.c:7458 (size 4)
>  WARNING: CPU: 7 PID: 995 at kernel/trace/trace.c:7458 write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
>  Modules linked in:
>  CPU: 7 UID: 0 PID: 995 Comm: bash Not tainted 6.17.0-test-00007-g60b82183e78a-dirty #211 PREEMPT(voluntary)
>  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
>  RIP: 0010:write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
>  Code: 04 00 75 a7 b9 04 00 00 00 48 89 de 48 89 04 24 48 c7 c2 e0 b1 d1 b2 48 c7 c7 40 b2 d1 b2 c6 05 2d 88 6a 04 01 e8 f7 e8 bd ff <0f> 0b 48 8b 04 24 e9 76 ff ff ff 49 8d 7c 24 04 49 8d 5c 24 08 48
>  RSP: 0018:ffff888104c3fc78 EFLAGS: 00010292
>  RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000000
>  RDX: 0000000000000000 RSI: 1ffffffff6b363b4 RDI: 0000000000000001
>  RBP: ffff888100058a00 R08: ffffffffb041d459 R09: ffffed1020987f40
>  R10: 0000000000000007 R11: 0000000000000001 R12: ffff888100bb9010
>  R13: 0000000000000000 R14: 00000000000003e3 R15: ffff888134800000
>  FS:  00007fa61d286740(0000) GS:ffff888286cad000(0000) knlGS:0000000000000000
>  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>  CR2: 0000560d28d509f1 CR3: 00000001047a4006 CR4: 0000000000172ef0
>  Call Trace:
>   <TASK>
>   tracing_mark_raw_write+0x1fe/0x290
>   ? __pfx_tracing_mark_raw_write+0x10/0x10
>   ? security_file_permission+0x50/0xf0
>   ? rw_verify_area+0x6f/0x4b0
>   vfs_write+0x1d8/0xdd0
>   ? __pfx_vfs_write+0x10/0x10
>   ? __pfx_css_rstat_updated+0x10/0x10
>   ? count_memcg_events+0xd9/0x410
>   ? fdget_pos+0x53/0x5e0
>   ksys_write+0x182/0x200
>   ? __pfx_ksys_write+0x10/0x10
>   ? do_user_addr_fault+0x4af/0xa30
>   do_syscall_64+0x63/0x350
>   entry_SYSCALL_64_after_hwframe+0x76/0x7e
>  RIP: 0033:0x7fa61d318687
>  Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
>  RSP: 002b:00007ffd87fe0120 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
>  RAX: ffffffffffffffda RBX: 00007fa61d286740 RCX: 00007fa61d318687
>  RDX: 0000000000000006 RSI: 0000560d28d509f0 RDI: 0000000000000001
>  RBP: 0000560d28d509f0 R08: 0000000000000000 R09: 0000000000000000
>  R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006
>  R13: 00007fa61d4715c0 R14: 00007fa61d46ee80 R15: 0000000000000000
>   </TASK>
>  ---[ end trace 0000000000000000 ]---
> 
> This is because fortify string sees that the size of entry->id is only 4
> bytes, but it is writing more than that. But this is OK as the
> dynamic_array is allocated to handle that copy.
> 
> Use a void pointer and get the offset via offsetof() to keep fortify
> string from warning about this copy.
> 
> Cc: [email-masked]
> Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
> Reported-by: [email-masked]
> Closes: https://lore.kernel.org/all/[email-masked]/
> Signed-off-by: Steven Rostedt (Google) <[email-masked]>

Ah, fixed already.

Acked-by: Masami Hiramatsu (Google) <[email-masked]>

> ---
>  kernel/trace/trace.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> index bbb89206a891..27855fc9e0f2 100644
> --- a/kernel/trace/trace.c
> +++ b/kernel/trace/trace.c
> @@ -7440,6 +7440,7 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
>  	struct raw_data_entry *entry;
>  	ssize_t written;
>  	size_t size;
> +	void *ptr;
>  
>  	size = sizeof(*entry) + cnt;
>  
> @@ -7455,7 +7456,10 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
>  		return -EBADF;
>  
>  	entry = ring_buffer_event_data(event);
> -	memcpy(&entry->id, buf, cnt);
> +	/* Do not let fortify-string warn copying to &entry->id */
> +	ptr = (void *)entry;
> +	ptr += offsetof(typeof(*entry), id);
> +	memcpy(ptr, buf, cnt);
>  	written = cnt;
>  
>  	__buffer_unlock_commit(buffer, event);
> -- 
> 2.51.0
> 
> 

-- 
Masami Hiramatsu (Google) <[email-masked]>

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Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
Date: Sun, 12 Oct 2025 11:24:21 +0200
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On Fri, 10 Oct 2025 15:16:18 +0200 Greg Kroah-Hartman <[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.

Boot-tested under QEMU for Rust x86_64:

Tested-by: Miguel Ojeda <[email-masked]>

um builds cleanly too.

Thanks!

Cheers,
Miguel

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Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
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On Fri, 10 Oct 2025 15:16:02 +0200 Greg Kroah-Hartman <[email-masked]> wrote:
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Tested-by: Miguel Ojeda <[email-masked]>

Thanks!

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Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
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On Fri, 10 Oct 2025 15:15:48 +0200 Greg Kroah-Hartman <[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.

Boot-tested under QEMU for Rust x86_64, arm64 and riscv64; built-tested
for arm and loongarch64:

Tested-by: Miguel Ojeda <[email-masked]>

Thanks!

Cheers,
Miguel

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From: Miguel Ojeda <[email-masked]>
To: [email-masked]
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	[email-masked],
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	[email-masked],
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	[email-masked],
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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
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Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
Date: Sun, 12 Oct 2025 11:42:44 +0200
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On Fri, 10 Oct 2025 15:15:55 +0200 Greg Kroah-Hartman <[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.

Boot-tested under QEMU for Rust x86_64, arm64 and riscv64; built-tested
for arm and loongarch64:

Tested-by: Miguel Ojeda <[email-masked]>

Thanks!

Cheers,
Miguel

From - Fri Oct 17 14:26:22 2025
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Subject: Linux 6.6.111
Date: Sun, 12 Oct 2025 13:19:35 +0200
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I'm announcing the release of the 6.6.111 kernel.

All users of the 6.6 kernel series must upgrade.

The updated 6.6.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.6.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                            |    2 
 arch/arm64/kernel/fpsimd.c                          |    8 +-
 arch/riscv/include/asm/processor.h                  |   33 +--------
 arch/x86/kvm/emulate.c                              |    9 +-
 arch/x86/kvm/kvm_emulate.h                          |    3 
 arch/x86/kvm/x86.c                                  |   15 ++--
 crypto/rng.c                                        |    8 ++
 drivers/hid/hid-mcp2221.c                           |    4 +
 drivers/md/dm-integrity.c                           |    2 
 drivers/media/i2c/tc358743.c                        |    4 -
 drivers/media/tuners/xc5000.c                       |   41 +++++-------
 drivers/net/can/rcar/rcar_canfd.c                   |    7 +-
 drivers/net/can/spi/hi311x.c                        |   33 +++++----
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/sw.c |    1 
 drivers/platform/x86/amd/pmc/pmc-quirks.c           |   15 ++++
 drivers/staging/axis-fifo/axis-fifo.c               |   68 +++++++++-----------
 drivers/tty/serial/Kconfig                          |    2 
 drivers/usb/serial/option.c                         |    6 +
 fs/btrfs/ref-verify.c                               |    9 ++
 include/linux/device.h                              |    3 
 net/9p/trans_fd.c                                   |    8 +-
 sound/soc/amd/acp/amd.h                             |    2 
 sound/soc/codecs/rt5682s.c                          |   17 ++---
 sound/usb/midi.c                                    |   10 +-
 tools/lib/subcmd/help.c                             |    3 
 25 files changed, 165 insertions(+), 148 deletions(-)

Arnaud Lecomte (1):
      hid: fix I2C read buffer overflow in raw_event() for mcp2221

Bitterblue Smith (1):
      wifi: rtlwifi: rtl8192cu: Don't claim USB ID 07b8:8188

Charlie Jenkins (2):
      riscv: mm: Use hint address in mmap if available
      riscv: mm: Do not restrict mmap address based on hint

Chen Yufeng (1):
      can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled

Christoffer Sandberg (1):
      platform/x86/amd/pmc: Add Stellaris Slim Gen6 AMD to spurious 8042 quirks list

David Sterba (1):
      btrfs: ref-verify: handle damaged extent root tree

Duoming Zhou (2):
      media: tuner: xc5000: Fix use-after-free in xc5000_release
      media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe

Duy Nguyen (1):
      can: rcar_canfd: Fix controller mode setting

Greg Kroah-Hartman (1):
      Linux 6.6.111

Herbert Xu (1):
      crypto: rng - Ensure set_ent is always present

Jack Yu (1):
      ASoC: rt5682s: Adjust SAR ADC button mode to fix noise issue

Jeongjun Park (1):
      ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

Mikulas Patocka (1):
      dm-integrity: limit MAX_TAG_SIZE to 255

Nalivayko Sergey (1):
      net/9p: fix double req put in p9_fd_cancelled

Ovidiu Panait (3):
      staging: axis-fifo: fix maximum TX packet length check
      staging: axis-fifo: fix TX handling on copy_from_user() failure
      staging: axis-fifo: flush RX FIFO on read errors

Rafael J. Wysocki (1):
      driver core/PM: Set power.no_callbacks along with power.no_pm

Raphael Gallais-Pou (1):
      serial: stm32: allow selecting console when the driver is module

Ricardo Ribalda (1):
      media: tunner: xc5000: Refactor firmware load

Sean Christopherson (1):
      KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

Takashi Iwai (1):
      ALSA: usb-audio: Kill timer properly at removal

Venkata Prasad Potturu (1):
      ASoC: amd: acp: Adjust pdm gain value

Will Deacon (1):
      KVM: arm64: Fix softirq masking in FPSIMD register saving sequence

Xiaowei Li (1):
      USB: serial: option: add SIMCom 8230C compositions

aprilgrimoire (1):
      platform/x86/amd/pmc: Add MECHREVO Yilong15Pro to spurious_8042 list

hupu (1):
      perf subcmd: avoid crash in exclude_cmds when excludes is empty

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 15:42:38 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
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Subject: [for-linus][PATCH v2 2/2] tracing: Stop fortify-string from warning in tracing_mark_raw_write()
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From: Steven Rostedt <[email-masked]>

The way tracing_mark_raw_write() records its data is that it has the
following structure:

  struct {
	struct trace_entry;
	int id;
	char buf[];
  };

But memcpy(&entry->id, buf, size) triggers the following warning when the
size is greater than the id:

 ------------[ cut here ]------------
 memcpy: detected field-spanning write (size 6) of single field "&entry->id" at kernel/trace/trace.c:7458 (size 4)
 WARNING: CPU: 7 PID: 995 at kernel/trace/trace.c:7458 write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Modules linked in:
 CPU: 7 UID: 0 PID: 995 Comm: bash Not tainted 6.17.0-test-00007-g60b82183e78a-dirty #211 PREEMPT(voluntary)
 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
 RIP: 0010:write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Code: 04 00 75 a7 b9 04 00 00 00 48 89 de 48 89 04 24 48 c7 c2 e0 b1 d1 b2 48 c7 c7 40 b2 d1 b2 c6 05 2d 88 6a 04 01 e8 f7 e8 bd ff <0f> 0b 48 8b 04 24 e9 76 ff ff ff 49 8d 7c 24 04 49 8d 5c 24 08 48
 RSP: 0018:ffff888104c3fc78 EFLAGS: 00010292
 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 1ffffffff6b363b4 RDI: 0000000000000001
 RBP: ffff888100058a00 R08: ffffffffb041d459 R09: ffffed1020987f40
 R10: 0000000000000007 R11: 0000000000000001 R12: ffff888100bb9010
 R13: 0000000000000000 R14: 00000000000003e3 R15: ffff888134800000
 FS:  00007fa61d286740(0000) GS:ffff888286cad000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000560d28d509f1 CR3: 00000001047a4006 CR4: 0000000000172ef0
 Call Trace:
  <TASK>
  tracing_mark_raw_write+0x1fe/0x290
  ? __pfx_tracing_mark_raw_write+0x10/0x10
  ? security_file_permission+0x50/0xf0
  ? rw_verify_area+0x6f/0x4b0
  vfs_write+0x1d8/0xdd0
  ? __pfx_vfs_write+0x10/0x10
  ? __pfx_css_rstat_updated+0x10/0x10
  ? count_memcg_events+0xd9/0x410
  ? fdget_pos+0x53/0x5e0
  ksys_write+0x182/0x200
  ? __pfx_ksys_write+0x10/0x10
  ? do_user_addr_fault+0x4af/0xa30
  do_syscall_64+0x63/0x350
  entry_SYSCALL_64_after_hwframe+0x76/0x7e
 RIP: 0033:0x7fa61d318687
 Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
 RSP: 002b:00007ffd87fe0120 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
 RAX: ffffffffffffffda RBX: 00007fa61d286740 RCX: 00007fa61d318687
 RDX: 0000000000000006 RSI: 0000560d28d509f0 RDI: 0000000000000001
 RBP: 0000560d28d509f0 R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006
 R13: 00007fa61d4715c0 R14: 00007fa61d46ee80 R15: 0000000000000000
  </TASK>
 ---[ end trace 0000000000000000 ]---

This is because fortify string sees that the size of entry->id is only 4
bytes, but it is writing more than that. But this is OK as the
dynamic_array is allocated to handle that copy.

The size allocated on the ring buffer was actually a bit too big:

  size = sizeof(*entry) + cnt;

But cnt includes the 'id' and the buffer data, so adding cnt to the size
of *entry actually allocates too much on the ring buffer.

Change the allocation to:

  size = struct_size(entry, buf, cnt - sizeof(entry->id));

and the memcpy() to unsafe_memcpy() with an added justification.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bbb89206a891..eb256378e65b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7441,7 +7441,8 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 	ssize_t written;
 	size_t size;
 
-	size = sizeof(*entry) + cnt;
+	/* cnt includes both the entry->id and the data behind it. */
+	size = struct_size(entry, buf, cnt - sizeof(entry->id));
 
 	buffer = tr->array_buffer.buffer;
 
@@ -7455,7 +7456,10 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 		return -EBADF;
 
 	entry = ring_buffer_event_data(event);
-	memcpy(&entry->id, buf, cnt);
+	unsafe_memcpy(&entry->id, buf, cnt,
+		      "id and content already reserved on ring buffer"
+		      "'buf' includes the 'id' and the data."
+		      "'entry' was allocated with cnt from 'id'.");
 	written = cnt;
 
 	__buffer_unlock_commit(buffer, event);
-- 
2.51.0

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Date: Sat, 11 Oct 2025 15:42:37 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
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Subject: [for-linus][PATCH v2 1/2] tracing: Fix tracing_mark_raw_write() to use buf and not ubuf
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SpamTally: Final spam score: -15

From: Steven Rostedt <[email-masked]>

The fix to use a per CPU buffer to read user space tested only the writes
to trace_marker. But it appears that the selftests are missing tests to
the trace_maker_raw file. The trace_maker_raw file is used by applications
that writes data structures and not strings into the file, and the tools
read the raw ring buffer to process the structures it writes.

The fix that reads the per CPU buffers passes the new per CPU buffer to
the trace_marker file writes, but the update to the trace_marker_raw write
read the data from user space into the per CPU buffer, but then still used
then passed the user space address to the function that records the data.

Pass in the per CPU buffer and not the user space address.

TODO: Add a test to better test trace_marker_raw.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mark Rutland <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Cc: Andrew Morton <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0fd582651293..bbb89206a891 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7497,12 +7497,12 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 	if (tr == &global_trace) {
 		guard(rcu)();
 		list_for_each_entry_rcu(tr, &marker_copies, marker_list) {
-			written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+			written = write_raw_marker_to_buffer(tr, buf, cnt);
 			if (written < 0)
 				break;
 		}
 	} else {
-		written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+		written = write_raw_marker_to_buffer(tr, buf, cnt);
 	}
 
 	return written;
-- 
2.51.0

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 21:59:43 +0200
Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Peter Schneider <[email-masked]>
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Am 10.10.2025 um 15:16 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

OpenPGP:  0xA3828BD796CCE11A8CADE8866E3A92C92C3FF244
Download: https://www.peters-netzplatz.de/download/pschneider1968_pub.asc
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 22:34:04 +0200
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Peter Schneider <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
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Am 10.10.2025 um 15:15 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

OpenPGP:  0xA3828BD796CCE11A8CADE8866E3A92C92C3FF244
Download: https://www.peters-netzplatz.de/download/pschneider1968_pub.asc
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 21:59:16 +0000
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Date: Sat, 11 Oct 2025 23:59:06 +0200
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Peter Schneider <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
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SpamTally: Final spam score: 4

Am 10.10.2025 um 15:15 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

OpenPGP:  0xA3828BD796CCE11A8CADE8866E3A92C92C3FF244
Download: https://www.peters-netzplatz.de/download/pschneider1968_pub.asc
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]
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From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 12:27:06 +0000
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From: Takeshi Ogasawara <[email-masked]>
Date: Sat, 11 Oct 2025 21:26:38 +0900
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
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                             valid
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
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Hi Greg

On Fri, Oct 10, 2025 at 10:18=E2=80=AFPM Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.17.2-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

6.17.2-rc1 tested.

Build successfully completed.
Boot successfully completed.
No dmesg regressions.
Video output normal.
Sound output normal.

Lenovo ThinkPad X1 Carbon Gen10(Intel i7-1260P(x86_64) arch linux)

[    0.000000] Linux version 6.17.2-rc1rv-g8902adbbfd36
(takeshi@ThinkPadX1Gen10J0764) (gcc (GCC) 15.2.1 20250813, GNU ld (GNU
Binutils) 2.45.0) #1 SMP PREEMPT_DYNAMIC Sat Oct 11 20:59:52 JST 2025

Thanks

Tested-by: Takeshi Ogasawara <[email-masked]>

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 18:21:22 +0200
From: Alexandre Belloni <[email-masked]>
To: Esben Haabendal <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH v2 0/5] rtc: Fix problems with missing UIE irqs
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  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
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  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
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                             author's domain
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
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SpamTally: Final spam score: 4

On Fri, 16 May 2025 09:23:34 +0200, Esben Haabendal wrote:
> This fixes a couple of different problems, that can cause RTC (alarm)
> irqs to be missing when generating UIE interrupts.
> 
> The first commit fixes a long-standing problem, which has been
> documented in a comment since 2010. This fixes a race that could cause
> UIE irqs to stop being generated, which was easily reproduced by
> timing the use of RTC_UIE_ON ioctl with the seconds tick in the RTC.
> 
> [...]

Applied, thanks!

[1/5] rtc: interface: Fix long-standing race when setting alarm
      https://git.kernel.org/abelloni/c/795cda8338ea
[2/5] rtc: isl12022: Fix initial enable_irq/disable_irq balance
      https://git.kernel.org/abelloni/c/9ffe06b6ccd7
[3/5] rtc: cpcap: Fix initial enable_irq/disable_irq balance
      https://git.kernel.org/abelloni/c/e0762fd26ad6
[4/5] rtc: tps6586x: Fix initial enable_irq/disable_irq balance
      https://git.kernel.org/abelloni/c/1502fe0e97be
[5/5] rtc: interface: Ensure alarm irq is enabled when UIE is enabled
      https://git.kernel.org/abelloni/c/9db26d5855d0

Best regards,

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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	[email-masked],
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	[email-masked],
	[email-masked],
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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Brett A C Sheffield <[email-masked]>
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
Date: Sat, 11 Oct 2025 16:56:13 +0000
                             DNSWL was blocked.  See
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SpamTally: Final spam score: 5

# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.16.12-rc1-ge006d63d59f2 #103 SMP PREEMPT_DYNAMIC Sat Oct 11 16:53:44 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

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	[email-masked],
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	[email-masked],
	[email-masked],
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	[email-masked],
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	Brett A C Sheffield <[email-masked]>
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
Date: Sat, 11 Oct 2025 16:55:04 +0000
                             medium trust
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SpamTally: Final spam score: -17

# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.17.2-rc1-g8902adbbfd36 #102 SMP PREEMPT_DYNAMIC Sat Oct 11 16:50:16 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Brett A C Sheffield <[email-masked]>
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
Date: Sat, 11 Oct 2025 17:03:29 +0000
                             DNSWL was blocked.  See
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SpamTally: Final spam score: 5

# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.6.111-rc1-g65af00078567 #105 SMP PREEMPT_DYNAMIC Sat Oct 11 17:01:57 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

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From: Brett A C Sheffield <[email-masked]>
To: [email-masked]
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	[email-masked],
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	[email-masked],
	[email-masked],
	[email-masked],
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	[email-masked],
	[email-masked],
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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
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Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
Date: Sat, 11 Oct 2025 16:59:30 +0000
                             DNSWL was blocked.  See
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SpamTally: Final spam score: 5

# Librecast Test Results

010/010 [ OK ] libmld
120/120 [ OK ] liblibrecast

CPU/kernel: Linux auntie 6.12.52-rc1-gf7ad21173a19 #104 SMP PREEMPT_DYNAMIC Sat Oct 11 16:57:49 -00 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Tested-by: Brett A C Sheffield <[email-masked]>

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 21:24:36 +0200
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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 [email-masked], [email-masked], [email-masked], [email-masked]
From: Peter Schneider <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: googlemail.com]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.0 FREEMAIL_FROM          Sender email is commonly abused enduser mail
                             provider
                             [pschneider1968[at]googlemail.com]
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
  0.0 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and
                             EnvelopeFrom freemail headers are
                             different
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 4

Am 10.10.2025 um 15:16 schrieb Greg Kroah-Hartman:
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Builds, boots and works on my 2-socket Ivy Bridge Xeon E5-2697 v2 server. No dmesg oddities or regressions found.

Tested-by: Peter Schneider <[email-masked]>

Beste Grüße,
Peter Schneider

-- 
Climb the mountain not to plant your flag, but to embrace the challenge,
enjoy the air and behold the view. Climb it so you can see the world,
not so the world can see you.                    -- David McCullough Jr.

OpenPGP:  0xA3828BD796CCE11A8CADE8866E3A92C92C3FF244
Download: https://www.peters-netzplatz.de/download/pschneider1968_pub.asc
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]
https://keys.mailvelope.com/pks/lookup?op=get&search=[email-masked]

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 11:31:53 +0000
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Date: Sat, 11 Oct 2025 04:31:25 -0700
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
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                              for more information.
                             [URIs: w6rz.net]
 -2.3 RCVD_IN_DNSWL_MED      RBL: Sender listed at https://www.dnswl.org/,
                             medium trust
                             [147.75.80.249 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
  0.1 DKIM_INVALID           DKIM or DK signature exists, but is not valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 35

On 10/10/25 06:15, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.2-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 11:37:53 +0000
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Date: Sat, 11 Oct 2025 04:37:33 -0700
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: w6rz.net]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
  0.0 RCVD_IN_DNSWL_BLOCKED  RBL: ADMINISTRATOR NOTICE: The query to
                             DNSWL was blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block
                              for more information.
                             [147.75.80.249 listed in list.dnswl.org]
  0.1 DKIM_INVALID           DKIM or DK signature exists, but is not valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 57

On 10/10/25 06:15, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.16.12-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.16.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 04:44:53 -0700
Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
                             DNSWL was blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block
                              for more information.
                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
  0.1 DKIM_INVALID           DKIM or DK signature exists, but is not valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 57

On 10/10/25 06:16, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.52-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 04:50:53 -0700
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked]
From: Ron Economos <[email-masked]>
DKIMCheck: Server failed DKIM test, 50 Spam score
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: w6rz.net]
 -2.3 RCVD_IN_DNSWL_MED      RBL: Sender listed at https://www.dnswl.org/,
                             medium trust
                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
  0.1 DKIM_INVALID           DKIM or DK signature exists, but is not valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 35

On 10/10/25 06:16, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.111-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Built and booted successfully on RISC-V RV64 (HiFive Unmatched).

Tested-by: Ron Economos <[email-masked]>

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 14:16:16 +0200
Subject: Re: [PATCH] leds: leds-lp50xx: allow LED 0 to be added to module bank
To: Christian Hitz <[email-masked]>, Lee Jones <[email-masked]>,
 Pavel Machek <[email-masked]>
Cc: Christian Hitz <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
From: Jacek Anaszewski <[email-masked]>
DKIMCheck: Server passes DKIM test, 0 Spam score
                             mail domains are different
  0.0 FREEMAIL_FROM          Sender email is commonly abused enduser mail
                             provider
                             [jacek.anaszewski[at]gmail.com]
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  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
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                             author's domain
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                             manager
SpamTally: Final spam score: 4

Hi Christian,

On 10/8/25 14:32, Christian Hitz wrote:
> From: Christian Hitz <[email-masked]>
> 
> led_banks contains LED module number(s) that should be grouped into the
> module bank. led_banks is 0-initialized.
> By checking the led_banks entries for 0, un-set entries are detected.
> But a 0-entry also indicates that LED module 0 should be grouped into the
> module bank.
> 
> By only iterating over the available entries no check for unused entries
> is required and LED module 0 can be added to bank.
> 
> Signed-off-by: Christian Hitz <[email-masked]>
> Cc: [email-masked]
> ---
>   drivers/leds/leds-lp50xx.c | 10 ++++------
>   1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
> index 94f8ef6b482c..d50c7f3e8f99 100644
> --- a/drivers/leds/leds-lp50xx.c
> +++ b/drivers/leds/leds-lp50xx.c
> @@ -341,17 +341,15 @@ static int lp50xx_brightness_set(struct led_classdev *cdev,
>   	return ret;
>   }
>   
> -static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
> +static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[], int num_leds)
>   {
>   	u8 led_config_lo, led_config_hi;
>   	u32 bank_enable_mask = 0;
>   	int ret;
>   	int i;
>   
> -	for (i = 0; i < priv->chip_info->max_modules; i++) {
> -		if (led_banks[i])
> -			bank_enable_mask |= (1 << led_banks[i]);
> -	}
> +	for (i = 0; i < num_leds; i++)
> +		bank_enable_mask |= (1 << led_banks[i]);

Probably the first idea was to have a bitmask indicating which bank
to enable, but it ended up in having array of bank ids in DT with no
related adjustment in the driver.

This patch deserves Fixes tag.

>   
>   	led_config_lo = bank_enable_mask;
>   	led_config_hi = bank_enable_mask >> 8;
> @@ -405,7 +403,7 @@ static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
>   			return ret;
>   		}
>   
> -		ret = lp50xx_set_banks(priv, led_banks);
> +		ret = lp50xx_set_banks(priv, led_banks, num_leds);
>   		if (ret) {
>   			dev_err(priv->dev, "Cannot setup banked LEDs\n");
>   			return ret;

Reviewed-by: Jacek Anaszewski <[email-masked]>

-- 
Best regards,
Jacek Anaszewski

From - Fri Oct 17 14:26:22 2025
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From: Naresh Kamboju <[email-masked]>
Date: Sat, 11 Oct 2025 14:33:42 +0530
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
DKIMCheck: Server passes DKIM test, 0 Spam score
                             medium trust
                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: -18

On Fri, 10 Oct 2025 at 18:49, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.16.12-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.16.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.16.12-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: e006d63d59f243154aba844a31f8ac8afd93484a
* git describe: v6.16.10-57-ge006d63d59f2
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.16.y/build/v6.16=
.10-57-ge006d63d59f2

## Test Regressions (compared to v6.16.10-15-g13cc90c947b1)

## Metric Regressions (compared to v6.16.10-15-g13cc90c947b1)

## Test Fixes (compared to v6.16.10-15-g13cc90c947b1)

## Metric Fixes (compared to v6.16.10-15-g13cc90c947b1)

## Test result summary
total: 166603, pass: 141637, fail: 5024, skip: 19942, xfail: 0

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 137 passed, 2 failed
* arm64: 57 total, 50 passed, 7 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 23 passed, 2 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-rust
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

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Date: Sat, 11 Oct 2025 11:49:39 +0100
From: Mark Brown <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
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--qONbR8myCT8qVBol
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On Fri, Oct 10, 2025 at 03:15:55PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Tested-by: Mark Brown <[email-masked]>

--qONbR8myCT8qVBol
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--qONbR8myCT8qVBol--

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 12:50:13 +0200
From: Takashi Iwai <[email-masked]>
To: Cryolitia PukNgae <[email-masked]>
Cc: Jaroslav Kysela <[email-masked]>,
	Takashi Iwai <[email-masked]>,
	Cryolitia PukNgae <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: Re: [PATCH] ALSA: usb-audio: apply quirk for Huawei Technologies Co., Ltd. CM-Q3
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On Sat, 11 Oct 2025 11:51:18 +0200,
Cryolitia PukNgae wrote:
> 
> There're several different actual hardwares sold by Huawei, using the
> same USB ID 12d1:3a07.
> 
> The first one we found, having a volume control named "Headset Playback
> Volume", reports a min value -15360, and will mute iff setting it to
> -15360. It can be simply fixed by quirk flag MIXER_PLAYBACK_MIN_MUTE,
> which we have already submitted previously.[1]
> 
> The second one we found today, having a volume control named "PCM
> Playback Volume", reports its min -11520 and res 256, and will mute
> when less than -11008. Because of the already existing quirk flag, we
> can just set its min to -11264, and the new minimum value will still
> not be available to userspace, so that userspace's minimum will be the
> correct -11008.
> 
> 1. https://lore.kernel.org/all/[email-masked]/
> 
> Tested-by: Guoli An <[email-masked]>
> Signed-off-by: Cryolitia PukNgae <[email-masked]>

Thanks, applied now.

Takashi

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Date: Sat, 11 Oct 2025 11:51:08 +0100
From: Mark Brown <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
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--KD0xSQXRFE5bDqJL
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On Fri, Oct 10, 2025 at 03:15:48PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Tested-by: Mark Brown <[email-masked]>

> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.

Late on a Friday with a deadline on Sunday isn't the idea way to get
tetsing...

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Date: Sat, 11 Oct 2025 11:55:41 +0100
From: Mark Brown <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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	[email-masked], [email-masked],
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Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
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--dJmC80PMygARyTnE
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On Fri, Oct 10, 2025 at 03:16:18PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Tested-by: Mark Brown <[email-masked]>

--dJmC80PMygARyTnE
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Date: Sat, 11 Oct 2025 11:58:37 +0100
From: Mark Brown <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
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--xSGS5eN43E63Hjrv
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On Fri, Oct 10, 2025 at 03:16:02PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

Tested-by: Mark Brown <[email-masked]>

--xSGS5eN43E63Hjrv
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--xSGS5eN43E63Hjrv--

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Subject: Re: [PATCH] drm/mediatek: fix device use-after-free on unbind
From: Sjoerd Simons <[email-masked]>
To: Johan Hovold <[email-masked]>, Chun-Kuang Hu
 <[email-masked]>,  Philipp Zabel <[email-masked]>
Cc: David Airlie <[email-masked]>, Simona Vetter <[email-masked]>, 
 Matthias Brugger <[email-masked]>, AngeloGioacchino Del Regno
 <[email-masked]>,  CK Hu <[email-masked]>, Ma
 Ke <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
	[email-masked]
Date: Sat, 11 Oct 2025 09:57:20 +0200
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On Mon, 2025-10-06 at 11:39 +0200, Johan Hovold wrote:
> A recent change fixed device reference leaks when looking up drm
> platform device driver data during bind() but failed to remove a partial
> fix which had been added by commit 80805b62ea5b ("drm/mediatek: Fix
> kobject put for component sub-drivers").
>=20
> This results in a reference imbalance on component bind() failures and
> on unbind() which could lead to a user-after-free.
>=20
> Make sure to only drop the references after retrieving the driver data
> by effectively reverting the previous partial fix.
>=20
> Note that holding a reference to a device does not prevent its driver
> data from going away so there is no point in keeping the reference.

Thanks for correcting my "fix". This looks better and i can confirm it fixe=
s the issue :)

Reviewed-By: Sjoerd Simons <[email-masked]>
Tested-By: Sjoerd Simons <[email-masked]>
=20
>=20
> Fixes: 1f403699c40f ("drm/mediatek: Fix device/node reference count leaks=
 in
> mtk_drm_get_all_drm_priv")
> Reported-by: Sjoerd Simons <[email-masked]>
> Link: https://lore.kernel.org/r/20251003-mtk-drm-refcount-v1-1-3b3f2813b0=
[email-masked]
> Cc: [email-masked]
> Cc: Ma Ke <[email-masked]>
> Cc: AngeloGioacchino Del Regno <[email-masked]>
> Signed-off-by: Johan Hovold <[email-masked]>
> ---
> =C2=A0drivers/gpu/drm/mediatek/mtk_drm_drv.c | 10 ----------
> =C2=A01 file changed, 10 deletions(-)
>=20
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/med=
iatek/mtk_drm_drv.c
> index 384b0510272c..a94c51a83261 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -686,10 +686,6 @@ static int mtk_drm_bind(struct device *dev)
> =C2=A0	for (i =3D 0; i < private->data->mmsys_dev_num; i++)
> =C2=A0		private->all_drm_private[i]->drm =3D NULL;
> =C2=A0err_put_dev:
> -	for (i =3D 0; i < private->data->mmsys_dev_num; i++) {
> -		/* For device_find_child in mtk_drm_get_all_priv() */
> -		put_device(private->all_drm_private[i]->dev);
> -	}
> =C2=A0	put_device(private->mutex_dev);
> =C2=A0	return ret;
> =C2=A0}
> @@ -697,18 +693,12 @@ static int mtk_drm_bind(struct device *dev)
> =C2=A0static void mtk_drm_unbind(struct device *dev)
> =C2=A0{
> =C2=A0	struct mtk_drm_private *private =3D dev_get_drvdata(dev);
> -	int i;
> =C2=A0
> =C2=A0	/* for multi mmsys dev, unregister drm dev in mmsys master */
> =C2=A0	if (private->drm_master) {
> =C2=A0		drm_dev_unregister(private->drm);
> =C2=A0		mtk_drm_kms_deinit(private->drm);
> =C2=A0		drm_dev_put(private->drm);
> -
> -		for (i =3D 0; i < private->data->mmsys_dev_num; i++) {
> -			/* For device_find_child in mtk_drm_get_all_priv() */
> -			put_device(private->all_drm_private[i]->dev);
> -		}
> =C2=A0		put_device(private->mutex_dev);
> =C2=A0	}
> =C2=A0	private->mtk_drm_bound =3D false;

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 08:40:06 +0000
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From: Naresh Kamboju <[email-masked]>
Date: Sat, 11 Oct 2025 14:09:44 +0530
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
DKIMCheck: Server passes DKIM test, 0 Spam score
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: linaro.org]
 -2.3 RCVD_IN_DNSWL_MED      RBL: Sender listed at https://www.dnswl.org/,
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                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: -18

On Fri, 10 Oct 2025 at 18:47, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.17.2-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.17.2-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: 8902adbbfd36cec55ff7b00116d287c06bda347c
* git describe: v6.17-43-g8902adbbfd36
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.17.y/build/v6.17=
-43-g8902adbbfd36

## Test Regressions (compared to v6.17-16-ge7da5b86b53d)

## Metric Regressions (compared to v6.17-16-ge7da5b86b53d)

## Test Fixes (compared to v6.17-16-ge7da5b86b53d)

## Metric Fixes (compared to v6.17-16-ge7da5b86b53d)

## Test result summary
total: 164414, pass: 138312, fail: 4644, skip: 21458, xfail: 0

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 138 passed, 1 failed
* arm64: 57 total, 50 passed, 7 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 23 passed, 2 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-rust
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 08:57:04 +0000
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From: Naresh Kamboju <[email-masked]>
Date: Sat, 11 Oct 2025 14:26:36 +0530
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
DKIMCheck: Server passes DKIM test, 0 Spam score
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: linaro.org]
  0.0 RCVD_IN_DNSWL_BLOCKED  RBL: ADMINISTRATOR NOTICE: The query to
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                             [142.0.200.124 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 4

On Fri, 10 Oct 2025 at 18:53, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.6.111-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.6.111-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: 65af00078567f7e13108e6036a6bcba7f2c26892
* git describe: v6.6.109-37-g65af00078567
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.1=
09-37-g65af00078567

## Test Regressions (compared to v6.6.109-8-gc901132c8088)

## Metric Regressions (compared to v6.6.109-8-gc901132c8088)

## Test Fixes (compared to v6.6.109-8-gc901132c8088)

## Metric Fixes (compared to v6.6.109-8-gc901132c8088)

## Test result summary
total: 133027, pass: 113628, fail: 4440, skip: 14481, xfail: 478

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 129 total, 128 passed, 1 failed
* arm64: 44 total, 40 passed, 4 failed
* i386: 23 total, 23 passed, 0 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 32 total, 31 passed, 1 failed
* riscv: 15 total, 14 passed, 1 failed
* s390: 14 total, 13 passed, 1 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 37 total, 34 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

From - Fri Oct 17 14:26:22 2025
Delivery-date: Sat, 11 Oct 2025 09:00:10 +0000
ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
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From: Naresh Kamboju <[email-masked]>
Date: Sat, 11 Oct 2025 14:29:48 +0530
Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
DKIMCheck: Server passes DKIM test, 0 Spam score
                             DNSWL was blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block
                              for more information.
                             [142.0.200.124 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
  0.0 URIBL_BLOCKED          ADMINISTRATOR NOTICE: The query to URIBL was
                             blocked.  See
                             http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block
                              for more information.
                             [URIs: linaro.org]
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
 -0.1 DKIM_VALID             Message has at least one valid DKIM or DK signature
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
                             valid
 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 4

On Fri, 10 Oct 2025 at 18:51, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.12.52-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.12.52-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: f7ad21173a1934329ac5bf0c8b5443d5666d3ce6
* git describe: v6.12.50-47-gf7ad21173a19
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12=
.50-47-gf7ad21173a19

## Test Regressions (compared to v6.12.50-11-g791ab27b9c00)

## Metric Regressions (compared to v6.12.50-11-g791ab27b9c00)

## Test Fixes (compared to v6.12.50-11-g791ab27b9c00)

## Metric Fixes (compared to v6.12.50-11-g791ab27b9c00)

## Test result summary
total: 154823, pass: 131476, fail: 4882, skip: 17920, xfail: 545

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 137 passed, 2 failed
* arm64: 57 total, 50 passed, 7 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 23 passed, 2 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

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From: Namjae Jeon <[email-masked]>
Date: Sat, 11 Oct 2025 14:40:36 +0900
Subject: Re: [PATCH v2] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
To: Jeongjun Park <[email-masked]>
Cc: Sungjong Seo <[email-masked]>, Yuezhang Mo <[email-masked]>, 
	Al Viro <[email-masked]>, [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked]
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On Fri, Oct 10, 2025 at 2:04=E2=80=AFPM Jeongjun Park <[email-masked]>=
 wrote:
>
> In exfat_nls_to_ucs2(), if there is no NLS loss and the char-to-ucs2
> conversion is successfully completed, the variable "i" will have the same
> value as len.
>
> However, exfat_nls_to_ucs2() checks p_cstring[i] to determine whether nls
> is lost immediately after the while loop ends, so if len is FSLABEL_MAX,
> "i" will also be FSLABEL_MAX immediately after the while loop ends,
> resulting in an out-of-bounds read of 1 byte from the p_cstring stack
> memory.
>
> Therefore, to prevent this and properly determine whether nls has been
> lost, it should be modified to check if "i" and len are equal, rather tha=
n
> dereferencing p_cstring.
>
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=3D98cc76a76de46b3714d4
> Fixes: 370e812b3ec1 ("exfat: add nls operations")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
>  fs/exfat/nls.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
> index 8243d94ceaf4..de06abe426d7 100644
> --- a/fs/exfat/nls.c
> +++ b/fs/exfat/nls.c
> @@ -616,7 +616,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
>                 unilen++;
>         }
>
> -       if (p_cstring[i] !=3D '\0')
> +       if (i !=3D len)
>                 lossy |=3D NLS_NAME_OVERLEN;
As I said before, the core problem is passing an incorrect length in the io=
ctl
FS_IOC_SETFSLABEL call. While your change may fix the symptom,
it doesn't fix the root cause.
Furthermore, NLS_NAME_OVERLEN macro is unnecessary.
That will result in different errors when creating a file with trailing per=
iods
with utf8 and the other iocharset.
Please remove it and make the same error handling for maximum length
consistent with exfat_utf8_to_utf16().

>
>         *uniname =3D '\0';
> --

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 08:30:25 +0200
From: Takashi Iwai <[email-masked]>
To: Denis Arefev <[email-masked]>
Cc: David Rhodes <[email-masked]>,
	Richard Fitzgerald <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	Takashi Iwai <[email-masked]>,
	Stefan Binding <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
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Subject: Re: [PATCH] ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()
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On Tue, 07 Oct 2025 09:38:31 +0200,
Denis Arefev wrote:
> 
> Return value of a function acpi_evaluate_dsm() is dereferenced  without
> checking for NULL, but it is usually checked for this function.
> 
> acpi_evaluate_dsm() may return NULL, when acpi_evaluate_object() returns
> acpi_status other than ACPI_SUCCESS, so add a check to prevent the crach.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 447106e92a0c ("ALSA: hda: cs35l41: Support mute notifications for CS35L41 HDA")
> Cc: [email-masked]
> Signed-off-by: Denis Arefev <[email-masked]>

Applied now.  Thanks.

Takashi

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Date: Sat, 11 Oct 2025 08:30:43 +0200
From: Takashi Iwai <[email-masked]>
To: Denis Arefev <[email-masked]>
Cc: David Rhodes <[email-masked]>,
	Richard Fitzgerald <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	Takashi Iwai <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: Re: [PATCH v2] ALSA: hda: Fix missing pointer check in hda_component_manager_init function
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On Thu, 09 Oct 2025 12:50:47 +0200,
Denis Arefev wrote:
> 
> The __component_match_add function may assign the 'matchptr' pointer
> the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced.
> 
> The call stack leading to the error looks like this:
> 
> hda_component_manager_init
> |-> component_match_add
>     |-> component_match_add_release
>         |-> __component_match_add ( ... ,**matchptr, ... )
>             |-> *matchptr = ERR_PTR(-ENOMEM);       // assign
> |-> component_master_add_with_match( ...  match)
>     |-> component_match_realloc(match, match->num); // dereference
> 
> Add IS_ERR() check to prevent the crash.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: ae7abe36e352 ("ALSA: hda/realtek: Add CS35L41 support for Thinkpad laptops")
> Cc: [email-masked]
> Signed-off-by: Denis Arefev <[email-masked]>
> ---
> V1 -> V2:
> Changed tag Fixes
> Add print to log an error it as Stefan Binding <[email-masked]> suggested

Applied now.  Thanks.

Takashi

From - Fri Oct 17 14:26:22 2025
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Date: Sat, 11 Oct 2025 09:30:35 +0200
From: Pavel Machek <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
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--p7rcESwphP0agS1J
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Hi!

> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.12.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--p7rcESwphP0agS1J
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Date: Sat, 11 Oct 2025 09:32:36 +0200
From: Pavel Machek <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
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--LRE7oHYaRJnAP2sI
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Hi!

> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.16.y

6.6 passes our testing, too:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.6.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--LRE7oHYaRJnAP2sI
Content-Type: application/pgp-signature; name="signature.asc"

--LRE7oHYaRJnAP2sI--

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Date: Fri, 10 Oct 2025 23:46:35 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
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Subject: [for-linus][PATCH 2/2] tracing: Stop fortify-string from warning in tracing_mark_raw_write()
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From: Steven Rostedt <[email-masked]>

The way tracing_mark_raw_write() records its data is that it has the
following structure:

  struct {
	struct trace_entry;
	int id;
	char dynamic_array[];
  };

But memcpy(&entry->id, buf, size) triggers the following warning when the
size is greater than the id:

 ------------[ cut here ]------------
 memcpy: detected field-spanning write (size 6) of single field "&entry->id" at kernel/trace/trace.c:7458 (size 4)
 WARNING: CPU: 7 PID: 995 at kernel/trace/trace.c:7458 write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Modules linked in:
 CPU: 7 UID: 0 PID: 995 Comm: bash Not tainted 6.17.0-test-00007-g60b82183e78a-dirty #211 PREEMPT(voluntary)
 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
 RIP: 0010:write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Code: 04 00 75 a7 b9 04 00 00 00 48 89 de 48 89 04 24 48 c7 c2 e0 b1 d1 b2 48 c7 c7 40 b2 d1 b2 c6 05 2d 88 6a 04 01 e8 f7 e8 bd ff <0f> 0b 48 8b 04 24 e9 76 ff ff ff 49 8d 7c 24 04 49 8d 5c 24 08 48
 RSP: 0018:ffff888104c3fc78 EFLAGS: 00010292
 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 1ffffffff6b363b4 RDI: 0000000000000001
 RBP: ffff888100058a00 R08: ffffffffb041d459 R09: ffffed1020987f40
 R10: 0000000000000007 R11: 0000000000000001 R12: ffff888100bb9010
 R13: 0000000000000000 R14: 00000000000003e3 R15: ffff888134800000
 FS:  00007fa61d286740(0000) GS:ffff888286cad000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000560d28d509f1 CR3: 00000001047a4006 CR4: 0000000000172ef0
 Call Trace:
  <TASK>
  tracing_mark_raw_write+0x1fe/0x290
  ? __pfx_tracing_mark_raw_write+0x10/0x10
  ? security_file_permission+0x50/0xf0
  ? rw_verify_area+0x6f/0x4b0
  vfs_write+0x1d8/0xdd0
  ? __pfx_vfs_write+0x10/0x10
  ? __pfx_css_rstat_updated+0x10/0x10
  ? count_memcg_events+0xd9/0x410
  ? fdget_pos+0x53/0x5e0
  ksys_write+0x182/0x200
  ? __pfx_ksys_write+0x10/0x10
  ? do_user_addr_fault+0x4af/0xa30
  do_syscall_64+0x63/0x350
  entry_SYSCALL_64_after_hwframe+0x76/0x7e
 RIP: 0033:0x7fa61d318687
 Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
 RSP: 002b:00007ffd87fe0120 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
 RAX: ffffffffffffffda RBX: 00007fa61d286740 RCX: 00007fa61d318687
 RDX: 0000000000000006 RSI: 0000560d28d509f0 RDI: 0000000000000001
 RBP: 0000560d28d509f0 R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006
 R13: 00007fa61d4715c0 R14: 00007fa61d46ee80 R15: 0000000000000000
  </TASK>
 ---[ end trace 0000000000000000 ]---

This is because fortify string sees that the size of entry->id is only 4
bytes, but it is writing more than that. But this is OK as the
dynamic_array is allocated to handle that copy.

Use a void pointer and get the offset via offsetof() to keep fortify
string from warning about this copy.

Cc: [email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bbb89206a891..27855fc9e0f2 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7440,6 +7440,7 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 	struct raw_data_entry *entry;
 	ssize_t written;
 	size_t size;
+	void *ptr;
 
 	size = sizeof(*entry) + cnt;
 
@@ -7455,7 +7456,10 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 		return -EBADF;
 
 	entry = ring_buffer_event_data(event);
-	memcpy(&entry->id, buf, cnt);
+	/* Do not let fortify-string warn copying to &entry->id */
+	ptr = (void *)entry;
+	ptr += offsetof(typeof(*entry), id);
+	memcpy(ptr, buf, cnt);
 	written = cnt;
 
 	__buffer_unlock_commit(buffer, event);
-- 
2.51.0

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Date: Sat, 11 Oct 2025 11:47:35 +0800
Subject: Re: [PATCH] perf lzma: Fix return value in lzma_is_compressed()
To: Miaoqian Lin <[email-masked]>, Peter Zijlstra <[email-masked]>,
 Ingo Molnar <[email-masked]>, Arnaldo Carvalho de Melo <[email-masked]>,
 Namhyung Kim <[email-masked]>, Mark Rutland <[email-masked]>,
 Alexander Shishkin <[email-masked]>,
 Jiri Olsa <[email-masked]>, Ian Rogers <[email-masked]>,
 Adrian Hunter <[email-masked]>,
 "Liang, Kan" <[email-masked]>,
 Stephen Brennan <[email-masked]>,
 [email-masked], [email-masked]
Cc: [email-masked]
From: "Mi, Dapeng" <[email-masked]>
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                             blocked.  See
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On 8/28/2025 6:50 PM, Miaoqian Lin wrote:
> lzma_is_compressed() returns -1 on error but is declared as bool.
> And -1 gets converted to true, which could be misleading.
> Return false instead to match the declared type.
>
> Fixes: 4b57fd44b61b ("perf tools: Add lzma_is_compressed function")
> Cc: <[email-masked]>
> Signed-off-by: Miaoqian Lin <[email-masked]>
> ---
>  tools/perf/util/lzma.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c
> index bbcd2ffcf4bd..c355757ed391 100644
> --- a/tools/perf/util/lzma.c
> +++ b/tools/perf/util/lzma.c
> @@ -120,7 +120,7 @@ bool lzma_is_compressed(const char *input)
>  	ssize_t rc;
>  
>  	if (fd < 0)
> -		return -1;
> +		return false;
>  
>  	rc = read(fd, buf, sizeof(buf));
>  	close(fd);

Reviewed-by: Dapeng Mi <[email-masked]>

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Date: Sat, 11 Oct 2025 11:48:56 +0800
Subject: Re: [PATCH] perf tools: Fix bool return value in gzip_is_compressed()
To: Miaoqian Lin <[email-masked]>, Peter Zijlstra <[email-masked]>,
 Ingo Molnar <[email-masked]>, Arnaldo Carvalho de Melo <[email-masked]>,
 Namhyung Kim <[email-masked]>, Mark Rutland <[email-masked]>,
 Alexander Shishkin <[email-masked]>,
 Jiri Olsa <[email-masked]>, Ian Rogers <[email-masked]>,
 Adrian Hunter <[email-masked]>,
 "Liang, Kan" <[email-masked]>, [email-masked],
 [email-masked]
Cc: [email-masked]
From: "Mi, Dapeng" <[email-masked]>
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SpamTally: Final spam score: 1

On 8/28/2025 6:46 PM, Miaoqian Lin wrote:
> gzip_is_compressed() returns -1 on error but is declared as bool.
> And -1 gets converted to true, which could be misleading.
> Return false instead to match the declared type.
>
> Fixes: 88c74dc76a30 ("perf tools: Add gzip_is_compressed function")
> Cc: <[email-masked]>
> Signed-off-by: Miaoqian Lin <[email-masked]>
> ---
>  tools/perf/util/zlib.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c
> index 78d2297c1b67..1f7c06523059 100644
> --- a/tools/perf/util/zlib.c
> +++ b/tools/perf/util/zlib.c
> @@ -88,7 +88,7 @@ bool gzip_is_compressed(const char *input)
>  	ssize_t rc;
>  
>  	if (fd < 0)
> -		return -1;
> +		return false;
>  
>  	rc = read(fd, buf, sizeof(buf));
>  	close(fd);

Reviewed-by: Dapeng Mi <[email-masked]>

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Date: Fri, 10 Oct 2025 23:51:42 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked],
 [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
 [email-masked],
 [email-masked]
Subject: [PATCH 1/2] tracing: Fix tracing_mark_raw_write() to use buf and not ubuf
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From: Steven Rostedt <[email-masked]>

The fix to use a per CPU buffer to read user space tested only the writes
to trace_marker. But it appears that the selftests are missing tests to
the trace_maker_raw file. The trace_maker_raw file is used by applications
that writes data structures and not strings into the file, and the tools
read the raw ring buffer to process the structures it writes.

The fix that reads the per CPU buffers passes the new per CPU buffer to
the trace_marker file writes, but the update to the trace_marker_raw write
read the data from user space into the per CPU buffer, but then still used
then passed the user space address to the function that records the data.

Pass in the per CPU buffer and not the user space address.

TODO: Add a test to better test trace_marker_raw.

Cc: [email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0fd582651293..bbb89206a891 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7497,12 +7497,12 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 	if (tr == &global_trace) {
 		guard(rcu)();
 		list_for_each_entry_rcu(tr, &marker_copies, marker_list) {
-			written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+			written = write_raw_marker_to_buffer(tr, buf, cnt);
 			if (written < 0)
 				break;
 		}
 	} else {
-		written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+		written = write_raw_marker_to_buffer(tr, buf, cnt);
 	}
 
 	return written;
-- 
2.51.0

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Date: Fri, 10 Oct 2025 23:51:43 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked],
 [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
 [email-masked],
 [email-masked]
Subject: [PATCH 2/2] tracing: Stop fortify-string from warning in tracing_mark_raw_write()
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From: Steven Rostedt <[email-masked]>

The way tracing_mark_raw_write() records its data is that it has the
following structure:

  struct {
	struct trace_entry;
	int id;
	char dynamic_array[];
  };

But memcpy(&entry->id, buf, size) triggers the following warning when the
size is greater than the id:

 ------------[ cut here ]------------
 memcpy: detected field-spanning write (size 6) of single field "&entry->id" at kernel/trace/trace.c:7458 (size 4)
 WARNING: CPU: 7 PID: 995 at kernel/trace/trace.c:7458 write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Modules linked in:
 CPU: 7 UID: 0 PID: 995 Comm: bash Not tainted 6.17.0-test-00007-g60b82183e78a-dirty #211 PREEMPT(voluntary)
 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
 RIP: 0010:write_raw_marker_to_buffer.isra.0+0x1f9/0x2e0
 Code: 04 00 75 a7 b9 04 00 00 00 48 89 de 48 89 04 24 48 c7 c2 e0 b1 d1 b2 48 c7 c7 40 b2 d1 b2 c6 05 2d 88 6a 04 01 e8 f7 e8 bd ff <0f> 0b 48 8b 04 24 e9 76 ff ff ff 49 8d 7c 24 04 49 8d 5c 24 08 48
 RSP: 0018:ffff888104c3fc78 EFLAGS: 00010292
 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 1ffffffff6b363b4 RDI: 0000000000000001
 RBP: ffff888100058a00 R08: ffffffffb041d459 R09: ffffed1020987f40
 R10: 0000000000000007 R11: 0000000000000001 R12: ffff888100bb9010
 R13: 0000000000000000 R14: 00000000000003e3 R15: ffff888134800000
 FS:  00007fa61d286740(0000) GS:ffff888286cad000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000560d28d509f1 CR3: 00000001047a4006 CR4: 0000000000172ef0
 Call Trace:
  <TASK>
  tracing_mark_raw_write+0x1fe/0x290
  ? __pfx_tracing_mark_raw_write+0x10/0x10
  ? security_file_permission+0x50/0xf0
  ? rw_verify_area+0x6f/0x4b0
  vfs_write+0x1d8/0xdd0
  ? __pfx_vfs_write+0x10/0x10
  ? __pfx_css_rstat_updated+0x10/0x10
  ? count_memcg_events+0xd9/0x410
  ? fdget_pos+0x53/0x5e0
  ksys_write+0x182/0x200
  ? __pfx_ksys_write+0x10/0x10
  ? do_user_addr_fault+0x4af/0xa30
  do_syscall_64+0x63/0x350
  entry_SYSCALL_64_after_hwframe+0x76/0x7e
 RIP: 0033:0x7fa61d318687
 Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
 RSP: 002b:00007ffd87fe0120 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
 RAX: ffffffffffffffda RBX: 00007fa61d286740 RCX: 00007fa61d318687
 RDX: 0000000000000006 RSI: 0000560d28d509f0 RDI: 0000000000000001
 RBP: 0000560d28d509f0 R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006
 R13: 00007fa61d4715c0 R14: 00007fa61d46ee80 R15: 0000000000000000
  </TASK>
 ---[ end trace 0000000000000000 ]---

This is because fortify string sees that the size of entry->id is only 4
bytes, but it is writing more than that. But this is OK as the
dynamic_array is allocated to handle that copy.

Use a void pointer and get the offset via offsetof() to keep fortify
string from warning about this copy.

Cc: [email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bbb89206a891..27855fc9e0f2 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7440,6 +7440,7 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 	struct raw_data_entry *entry;
 	ssize_t written;
 	size_t size;
+	void *ptr;
 
 	size = sizeof(*entry) + cnt;
 
@@ -7455,7 +7456,10 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 		return -EBADF;
 
 	entry = ring_buffer_event_data(event);
-	memcpy(&entry->id, buf, cnt);
+	/* Do not let fortify-string warn copying to &entry->id */
+	ptr = (void *)entry;
+	ptr += offsetof(typeof(*entry), id);
+	memcpy(ptr, buf, cnt);
 	written = cnt;
 
 	__buffer_unlock_commit(buffer, event);
-- 
2.51.0

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 16:20:12 -0600
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], Shuah Khan <[email-masked]>
From: Shuah Khan <[email-masked]>
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SpamTally: Final spam score: 0

On 10/10/25 07:15, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.2-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <[email-masked]>

thanks,
-- Shuah

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 16:20:44 -0600
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], Shuah Khan <[email-masked]>
From: Shuah Khan <[email-masked]>
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SpamTally: Final spam score: 0

On 10/10/25 07:15, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.16.12-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.16.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <[email-masked]>

thanks,
-- Shuah

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 16:21:10 -0600
Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], Shuah Khan <[email-masked]>
From: Shuah Khan <[email-masked]>
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SpamTally: Final spam score: -22

On 10/10/25 07:16, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.52-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <[email-masked]>

thanks,
-- Shuah

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 16:21:38 -0600
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], Shuah Khan <[email-masked]>
From: Shuah Khan <[email-masked]>
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                             medium trust
                             [139.178.88.99 listed in list.dnswl.org]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
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SpamTally: Final spam score: -22

On 10/10/25 07:16, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.111-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

Tested-by: Shuah Khan <[email-masked]>

thanks,
-- Shuah

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 23:46:34 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
 [email-masked],
 [email-masked]
Subject: [for-linus][PATCH 1/2] tracing: Fix tracing_mark_raw_write() to use buf and not ubuf
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From: Steven Rostedt <[email-masked]>

The fix to use a per CPU buffer to read user space tested only the writes
to trace_marker. But it appears that the selftests are missing tests to
the trace_maker_raw file. The trace_maker_raw file is used by applications
that writes data structures and not strings into the file, and the tools
read the raw ring buffer to process the structures it writes.

The fix that reads the per CPU buffers passes the new per CPU buffer to
the trace_marker file writes, but the update to the trace_marker_raw write
read the data from user space into the per CPU buffer, but then still used
then passed the user space address to the function that records the data.

Pass in the per CPU buffer and not the user space address.

TODO: Add a test to better test trace_marker_raw.

Cc: [email-masked]
Fixes: 64cf7d058a00 ("tracing: Have trace_marker use per-cpu data to read user space")
Reported-by: [email-masked]
Closes: https://lore.kernel.org/all/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0fd582651293..bbb89206a891 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7497,12 +7497,12 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 	if (tr == &global_trace) {
 		guard(rcu)();
 		list_for_each_entry_rcu(tr, &marker_copies, marker_list) {
-			written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+			written = write_raw_marker_to_buffer(tr, buf, cnt);
 			if (written < 0)
 				break;
 		}
 	} else {
-		written = write_raw_marker_to_buffer(tr, ubuf, cnt);
+		written = write_raw_marker_to_buffer(tr, buf, cnt);
 	}
 
 	return written;
-- 
2.51.0

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 13:48:18 -0600
From: Justin Forbes <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
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On Fri, Oct 10, 2025 at 03:15:48PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.16.12-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.16.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

Tested rc1 against the Fedora build system (aarch64, ppc64le, s390x,
x86_64), and boot tested x86_64. No regressions noted.

Tested-by: Justin M. Forbes <[email-masked]>

From - Fri Oct 17 14:26:23 2025
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Date: Fri, 10 Oct 2025 13:51:17 -0600
From: Justin Forbes <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
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On Fri, Oct 10, 2025 at 03:15:55PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.2-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

Tested rc1 against the Fedora build system (aarch64, ppc64le, s390x,
x86_64), and boot tested x86_64. No regressions noted.

Tested-by: Justin M. Forbes <[email-masked]>

From - Fri Oct 17 14:26:23 2025
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From: Brett Mastbergen <[email-masked]>
Date: Fri, 10 Oct 2025 16:30:12 -0400
Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
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On Fri, Oct 10, 2025 at 9:24=E2=80=AFAM Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.12.52-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.12.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>

Builds successfully.  Boots and works on qemu and Dell XPS 15 9520 w/
Intel Core i7-12600H

Tested-by: Brett Mastbergen <[email-masked]>

Thanks,
Brett

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Subject: Re: [PATCH] drm/amdgpu: use atomic functions with memory barriers for
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On 2025-10-07 23:43, Gui-Dong Han wrote:
> The atomic variable vm_fault_info_updated is used to synchronize access to
> adev->gmc.vm_fault_info between the interrupt handler and
> get_vm_fault_info().
>
> The default atomic functions like atomic_set() and atomic_read() do not
> provide memory barriers. This allows for CPU instruction reordering,
> meaning the memory accesses to vm_fault_info and the vm_fault_info_updated
> flag are not guaranteed to occur in the intended order. This creates a
> race condition that can lead to inconsistent or stale data being used.
>
> The previous implementation, which used an explicit mb(), was incomplete
> and inefficient. It failed to account for all potential CPU reorderings,
> such as the access of vm_fault_info being reordered before the atomic_read
> of the flag. This approach is also more verbose and less performant than
> using the proper atomic functions with acquire/release semantics.
>
> Fix this by switching to atomic_set_release() and atomic_read_acquire().
> These functions provide the necessary acquire and release semantics,
> which act as memory barriers to ensure the correct order of operations.
> It is also more efficient and idiomatic than using explicit full memory
> barriers.
>
> Fixes: b97dfa27ef3a ("drm/amdgpu: save vm fault information for amdkfd")
> Cc: [email-masked]
> Signed-off-by: Gui-Dong Han <[email-masked]>

Thank you! The patch looks good to me. I'm applying it to 
amd-staging-drm-next.

Reviewed-by: Felix Kuehling <[email-masked]>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 5 ++---
>   drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c            | 7 +++----
>   drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c            | 7 +++----
>   3 files changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index b16cce7c22c3..ac09bbe51634 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -2325,10 +2325,9 @@ void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct kgd_mem *mem)
>   int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct amdgpu_device *adev,
>   					  struct kfd_vm_fault_info *mem)
>   {
> -	if (atomic_read(&adev->gmc.vm_fault_info_updated) == 1) {
> +	if (atomic_read_acquire(&adev->gmc.vm_fault_info_updated) == 1) {
>   		*mem = *adev->gmc.vm_fault_info;
> -		mb(); /* make sure read happened */
> -		atomic_set(&adev->gmc.vm_fault_info_updated, 0);
> +		atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
>   	}
>   	return 0;
>   }
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> index a8d5795084fc..cf30d3332050 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> @@ -1066,7 +1066,7 @@ static int gmc_v7_0_sw_init(struct amdgpu_ip_block *ip_block)
>   					GFP_KERNEL);
>   	if (!adev->gmc.vm_fault_info)
>   		return -ENOMEM;
> -	atomic_set(&adev->gmc.vm_fault_info_updated, 0);
> +	atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
>   
>   	return 0;
>   }
> @@ -1288,7 +1288,7 @@ static int gmc_v7_0_process_interrupt(struct amdgpu_device *adev,
>   	vmid = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
>   			     VMID);
>   	if (amdgpu_amdkfd_is_kfd_vmid(adev, vmid)
> -		&& !atomic_read(&adev->gmc.vm_fault_info_updated)) {
> +		&& !atomic_read_acquire(&adev->gmc.vm_fault_info_updated)) {
>   		struct kfd_vm_fault_info *info = adev->gmc.vm_fault_info;
>   		u32 protections = REG_GET_FIELD(status,
>   					VM_CONTEXT1_PROTECTION_FAULT_STATUS,
> @@ -1304,8 +1304,7 @@ static int gmc_v7_0_process_interrupt(struct amdgpu_device *adev,
>   		info->prot_read = protections & 0x8 ? true : false;
>   		info->prot_write = protections & 0x10 ? true : false;
>   		info->prot_exec = protections & 0x20 ? true : false;
> -		mb();
> -		atomic_set(&adev->gmc.vm_fault_info_updated, 1);
> +		atomic_set_release(&adev->gmc.vm_fault_info_updated, 1);
>   	}
>   
>   	return 0;
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> index b45fa0cea9d2..0d4c93ff6f74 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
> @@ -1179,7 +1179,7 @@ static int gmc_v8_0_sw_init(struct amdgpu_ip_block *ip_block)
>   					GFP_KERNEL);
>   	if (!adev->gmc.vm_fault_info)
>   		return -ENOMEM;
> -	atomic_set(&adev->gmc.vm_fault_info_updated, 0);
> +	atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
>   
>   	return 0;
>   }
> @@ -1474,7 +1474,7 @@ static int gmc_v8_0_process_interrupt(struct amdgpu_device *adev,
>   	vmid = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
>   			     VMID);
>   	if (amdgpu_amdkfd_is_kfd_vmid(adev, vmid)
> -		&& !atomic_read(&adev->gmc.vm_fault_info_updated)) {
> +		&& !atomic_read_acquire(&adev->gmc.vm_fault_info_updated)) {
>   		struct kfd_vm_fault_info *info = adev->gmc.vm_fault_info;
>   		u32 protections = REG_GET_FIELD(status,
>   					VM_CONTEXT1_PROTECTION_FAULT_STATUS,
> @@ -1490,8 +1490,7 @@ static int gmc_v8_0_process_interrupt(struct amdgpu_device *adev,
>   		info->prot_read = protections & 0x8 ? true : false;
>   		info->prot_write = protections & 0x10 ? true : false;
>   		info->prot_exec = protections & 0x20 ? true : false;
> -		mb();
> -		atomic_set(&adev->gmc.vm_fault_info_updated, 1);
> +		atomic_set_release(&adev->gmc.vm_fault_info_updated, 1);
>   	}
>   
>   	return 0;

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Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
Date: Fri, 10 Oct 2025 10:15:38 -0700
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On Fri, 10 Oct 2025 15:15:55 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.17.2 release.
> There are 26 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.2-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.17:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.17.2-rc1-g8902adbbfd36
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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Date: Fri, 10 Oct 2025 19:37:48 +0200
From: Markus Reichelt <[email-masked]>
To: [email-masked], [email-masked]
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
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* Greg Kroah-Hartman <[email-masked]> wrote:

> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.

Hi Greg

6.16.12-rc1 compiles on x86_64 (Xeon E5-1620 v2, Slackware64-15.0),
and boots & runs on x86_64 (AMD Ryzen 5 7520U, Slackware64-current).
No regressions observed.

Tested-by: Markus Reichelt <[email-masked]>

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Date: Sat, 11 Oct 2025 03:43:31 +0800
From: kernel test robot <[email-masked]>
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Subject: Re: [PATCH] Input: pegasus-notetaker - fix out-of-bounds access
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Hi pip-izony,

kernel test robot noticed the following build warnings:

[auto build test WARNING on dtor-input/next]
[also build test WARNING on dtor-input/for-linus linus/master v6.17 next-20251010]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/pip-izony/Input-pegasus-notetaker-fix-out-of-bounds-access-vulnerability-in-pegasus_parse_packet-function-of-the-pegasus-driver/20251009-180618
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
patch link:    https://lore.kernel.org/r/20251007214131.3737115-2-eeodqql09%40gmail.com
patch subject: [PATCH] Input: pegasus-notetaker - fix out-of-bounds access vulnerability in pegasus_parse_packet() function of the pegasus driver
config: powerpc64-randconfig-r073-20251010 (https://download.01.org/0day-ci/archive/20251011/[email-masked]/config)
compiler: powerpc64-linux-gcc (GCC) 8.5.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

smatch warnings:
drivers/input/tablet/pegasus_notetaker.c:314 pegasus_probe() warn: inconsistent indenting

vim +314 drivers/input/tablet/pegasus_notetaker.c

   270	
   271	static int pegasus_probe(struct usb_interface *intf,
   272				 const struct usb_device_id *id)
   273	{
   274		struct usb_device *dev = interface_to_usbdev(intf);
   275		struct usb_endpoint_descriptor *endpoint;
   276		struct pegasus *pegasus;
   277		struct input_dev *input_dev;
   278		int error;
   279		int pipe;
   280	
   281		/* We control interface 0 */
   282		if (intf->cur_altsetting->desc.bInterfaceNumber >= 1)
   283			return -ENODEV;
   284	
   285		/* Sanity check that the device has an endpoint */
   286		if (intf->cur_altsetting->desc.bNumEndpoints < 1) {
   287			dev_err(&intf->dev, "Invalid number of endpoints\n");
   288			return -EINVAL;
   289		}
   290	
   291		endpoint = &intf->cur_altsetting->endpoint[0].desc;
   292	
   293		pegasus = kzalloc(sizeof(*pegasus), GFP_KERNEL);
   294		input_dev = input_allocate_device();
   295		if (!pegasus || !input_dev) {
   296			error = -ENOMEM;
   297			goto err_free_mem;
   298		}
   299	
   300		mutex_init(&pegasus->pm_mutex);
   301	
   302		pegasus->usbdev = dev;
   303		pegasus->dev = input_dev;
   304		pegasus->intf = intf;
   305	
   306		pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
   307		/* Sanity check that pipe's type matches endpoint's type */
   308		if (usb_pipe_type_check(dev, pipe)) {
   309			error = -EINVAL;
   310			goto err_free_mem;
   311		}
   312	
   313		pegasus->data_len = usb_maxpacket(dev, pipe);
 > 314	    if (pegasus->data_len < 5) {
   315			dev_err(&intf->dev, "Invalid number of wMaxPacketSize\n");
   316			error = -EINVAL;
   317			goto err_free_mem;
   318		}
   319	
   320		pegasus->data = usb_alloc_coherent(dev, pegasus->data_len, GFP_KERNEL,
   321						   &pegasus->data_dma);
   322		if (!pegasus->data) {
   323			error = -ENOMEM;
   324			goto err_free_mem;
   325		}
   326	
   327		pegasus->irq = usb_alloc_urb(0, GFP_KERNEL);
   328		if (!pegasus->irq) {
   329			error = -ENOMEM;
   330			goto err_free_dma;
   331		}
   332	
   333		usb_fill_int_urb(pegasus->irq, dev, pipe,
   334				 pegasus->data, pegasus->data_len,
   335				 pegasus_irq, pegasus, endpoint->bInterval);
   336	
   337		pegasus->irq->transfer_dma = pegasus->data_dma;
   338		pegasus->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
   339	
   340		if (dev->manufacturer)
   341			strscpy(pegasus->name, dev->manufacturer,
   342				sizeof(pegasus->name));
   343	
   344		if (dev->product) {
   345			if (dev->manufacturer)
   346				strlcat(pegasus->name, " ", sizeof(pegasus->name));
   347			strlcat(pegasus->name, dev->product, sizeof(pegasus->name));
   348		}
   349	
   350		if (!strlen(pegasus->name))
   351			snprintf(pegasus->name, sizeof(pegasus->name),
   352				 "USB Pegasus Device %04x:%04x",
   353				 le16_to_cpu(dev->descriptor.idVendor),
   354				 le16_to_cpu(dev->descriptor.idProduct));
   355	
   356		usb_make_path(dev, pegasus->phys, sizeof(pegasus->phys));
   357		strlcat(pegasus->phys, "/input0", sizeof(pegasus->phys));
   358	
   359		INIT_WORK(&pegasus->init, pegasus_init);
   360	
   361		usb_set_intfdata(intf, pegasus);
   362	
   363		input_dev->name = pegasus->name;
   364		input_dev->phys = pegasus->phys;
   365		usb_to_input_id(dev, &input_dev->id);
   366		input_dev->dev.parent = &intf->dev;
   367	
   368		input_set_drvdata(input_dev, pegasus);
   369	
   370		input_dev->open = pegasus_open;
   371		input_dev->close = pegasus_close;
   372	
   373		__set_bit(EV_ABS, input_dev->evbit);
   374		__set_bit(EV_KEY, input_dev->evbit);
   375	
   376		__set_bit(ABS_X, input_dev->absbit);
   377		__set_bit(ABS_Y, input_dev->absbit);
   378	
   379		__set_bit(BTN_TOUCH, input_dev->keybit);
   380		__set_bit(BTN_RIGHT, input_dev->keybit);
   381		__set_bit(BTN_TOOL_PEN, input_dev->keybit);
   382	
   383		__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
   384		__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
   385	
   386		input_set_abs_params(input_dev, ABS_X, -1500, 1500, 8, 0);
   387		input_set_abs_params(input_dev, ABS_Y, 1600, 3000, 8, 0);
   388	
   389		error = input_register_device(pegasus->dev);
   390		if (error)
   391			goto err_free_urb;
   392	
   393		return 0;
   394	
   395	err_free_urb:
   396		usb_free_urb(pegasus->irq);
   397	err_free_dma:
   398		usb_free_coherent(dev, pegasus->data_len,
   399				  pegasus->data, pegasus->data_dma);
   400	err_free_mem:
   401		input_free_device(input_dev);
   402		kfree(pegasus);
   403		usb_set_intfdata(intf, NULL);
   404	
   405		return error;
   406	}
   407	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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From: Jon Hunter <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
CC: Greg Kroah-Hartman <[email-masked]>,
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	<[email-masked]>, <[email-masked]>, <[email-masked]>
Subject: Re: [PATCH 6.6 00/28] 6.6.111-rc1 review
Date: Fri, 10 Oct 2025 10:14:58 -0700
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On Fri, 10 Oct 2025 15:16:18 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.6.111 release.
> There are 28 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.6.111-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.6.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.6:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.6.111-rc1-g65af00078567
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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CC: Greg Kroah-Hartman <[email-masked]>,
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Subject: Re: [PATCH 6.12 00/35] 6.12.52-rc1 review
Date: Fri, 10 Oct 2025 10:15:07 -0700
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On Fri, 10 Oct 2025 15:16:02 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.12.52 release.
> There are 35 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.52-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.12:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    120 tests:	120 pass, 0 fail

Linux version:	6.12.52-rc1-gf7ad21173a19
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

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To: Greg Kroah-Hartman <[email-masked]>
CC: Greg Kroah-Hartman <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>
Subject: Re: [PATCH 6.16 00/41] 6.16.12-rc1 review
Date: Fri, 10 Oct 2025 10:15:14 -0700
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On Fri, 10 Oct 2025 15:15:48 +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.16.12 release.
> There are 41 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Sun, 12 Oct 2025 13:13:18 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.16.12-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.16.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v6.16:
    10 builds:	10 pass, 0 fail
    28 boots:	28 pass, 0 fail
    109 tests:	109 pass, 0 fail

Linux version:	6.16.12-rc1-ge006d63d59f2
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra186-p3509-0000+p3636-0001, tegra194-p2972-0000,
                tegra194-p3509-0000+p3668-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra210-p3450-0000,
                tegra30-cardhu-a04

Tested-by: Jon Hunter <[email-masked]>

Jon

From - Fri Oct 17 14:26:23 2025
Delivery-date: Fri, 10 Oct 2025 15:08:45 +0000
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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
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	Jacob Keller <[email-masked]>,
	Jeongjun Park <[email-masked]>
Subject: [PATCH 6.1.y 12/12] Bluetooth: hci_qca: Fix the teardown problem for real
Date: Sat, 11 Oct 2025 00:02:52 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit e0d3da982c96aeddc1bbf1cf9469dbb9ebdca657 ]

While discussing solutions for the teardown problem which results from
circular dependencies between timers and workqueues, where timers schedule
work from their timer callback and workqueues arm the timers from work
items, it was discovered that the recent fix to the QCA code is incorrect.

That commit fixes the obvious problem of using del_timer() instead of
del_timer_sync() and reorders the teardown calls to

   destroy_workqueue(wq);
   del_timer_sync(t);

This makes it less likely to explode, but it's still broken:

   destroy_workqueue(wq);
   /* After this point @wq cannot be touched anymore */

   ---> timer expires
         queue_work(wq) <---- Results in a NULL pointer dereference
			      deep in the work queue core code.
   del_timer_sync(t);

Use the new timer_shutdown_sync() function to ensure that the timers are
disarmed, no timer callbacks are running and the timers cannot be armed
again. This restores the original teardown sequence:

   timer_shutdown_sync(t);
   destroy_workqueue(wq);

which is now correct because the timer core silently ignores potential
rearming attempts which can happen when destroy_workqueue() drains pending
work before mopping up the workqueue.

Fixes: 72ef98445aca ("Bluetooth: hci_qca: Use del_timer_sync() before freeing")
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Acked-by: Luiz Augusto von Dentz <[email-masked]>
Link: https://lore.kernel.org/all/87iljhsftt.ffs@tglx
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 drivers/bluetooth/hci_qca.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 66f416f59a8d..204ba1de624d 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -710,9 +710,15 @@ static int qca_close(struct hci_uart *hu)
 	skb_queue_purge(&qca->tx_wait_q);
 	skb_queue_purge(&qca->txq);
 	skb_queue_purge(&qca->rx_memdump_q);
+	/*
+	 * Shut the timers down so they can't be rearmed when
+	 * destroy_workqueue() drains pending work which in turn might try
+	 * to arm a timer.  After shutdown rearm attempts are silently
+	 * ignored by the timer core code.
+	 */
+	timer_shutdown_sync(&qca->tx_idle_timer);
+	timer_shutdown_sync(&qca->wake_retrans_timer);
 	destroy_workqueue(qca->workqueue);
-	del_timer_sync(&qca->tx_idle_timer);
-	del_timer_sync(&qca->wake_retrans_timer);
 	qca->hu = NULL;
 
 	kfree_skb(qca->rx_skb);
--

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Date: Fri, 10 Oct 2025 17:14:55 +0200
Subject: Re: [PATCH 6.17 00/26] 6.17.2-rc1 review
To: Greg Kroah-Hartman <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
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From: Ronald Warsow <[email-masked]>
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Hi

no regressions here on x86_64 (RKL, Intel 11th Gen. CPU)

Thanks

Tested-by: Ronald Warsow <[email-masked]>

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Date: Fri, 10 Oct 2025 18:09:58 +0200
From: Pali =?utf-8?B?Um9ow6Fy?= <[email-masked]>
To: Jeongjun Park <[email-masked]>
Cc: Namjae Jeon <[email-masked]>,
	Sungjong Seo <[email-masked]>,
	Yuezhang Mo <[email-masked]>,
	Al Viro <[email-masked]>, [email-masked],
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	[email-masked]
Subject: Re: [PATCH v2] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
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On Friday 10 October 2025 14:03:29 Jeongjun Park wrote:
> In exfat_nls_to_ucs2(), if there is no NLS loss and the char-to-ucs2
> conversion is successfully completed, the variable "i" will have the same
> value as len. 
> 
> However, exfat_nls_to_ucs2() checks p_cstring[i] to determine whether nls
> is lost immediately after the while loop ends, so if len is FSLABEL_MAX,
> "i" will also be FSLABEL_MAX immediately after the while loop ends,
> resulting in an out-of-bounds read of 1 byte from the p_cstring stack
> memory.
> 
> Therefore, to prevent this and properly determine whether nls has been
> lost, it should be modified to check if "i" and len are equal, rather than
> dereferencing p_cstring.
> 
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=98cc76a76de46b3714d4
> Fixes: 370e812b3ec1 ("exfat: add nls operations")
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
>  fs/exfat/nls.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
> index 8243d94ceaf4..de06abe426d7 100644
> --- a/fs/exfat/nls.c
> +++ b/fs/exfat/nls.c
> @@ -616,7 +616,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
>  		unilen++;
>  	}
>  
> -	if (p_cstring[i] != '\0')
> +	if (i != len)
>  		lossy |= NLS_NAME_OVERLEN;
>  
>  	*uniname = '\0';
> --

Looks good for me,

Reviewed-by: Pali Rohár <[email-masked]>

From - Fri Oct 17 14:26:23 2025
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Subject: Re: [f2fs-dev] [PATCH] f2fs: fix wrong block mapping for
 multi-devices
From: [email-masked]
Date: Fri, 10 Oct 2025 16:10:05 +0000
To: Jaegeuk Kim <[email-masked]>
Cc: [email-masked], [email-masked],
 [email-masked]
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Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <[email-masked]>:

On Tue,  7 Oct 2025 03:53:43 +0000 you wrote:
> Assuming the disk layout as below,
> 
> disk0: 0            --- 0x00035abfff
> disk1: 0x00035ac000 --- 0x00037abfff
> disk2: 0x00037ac000 --- 0x00037ebfff
> 
> and we want to read data from offset=13568 having len=128 across the block
> devices, we can illustrate the block addresses like below.
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: fix wrong block mapping for multi-devices
    https://git.kernel.org/jaegeuk/f2fs/c/7d9fdb3c9e5b

You are awesome, thank you!
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Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
From: [email-masked]
Date: Fri, 10 Oct 2025 17:10:06 +0000
To: Alexander Lobakin <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked]
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Hello:

This patch was applied to bpf/bpf.git (master)
by Alexei Starovoitov <[email-masked]>:

On Wed,  8 Oct 2025 18:56:59 +0200 you wrote:
> Turned out certain clearly invalid values passed in &xdp_desc from
> userspace can pass xp_{,un}aligned_validate_desc() and then lead
> to UBs or just invalid frames to be queued for xmit.
> 
> desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
> can cause positive integer overflow and wraparound, the same way low
> enough desc->addr with a non-zero pool->tx_metadata_len can cause
> negative integer overflow. Both scenarios can then pass the
> validation successfully.
> This doesn't happen with valid XSk applications, but can be used
> to perform attacks.
> 
> [...]

Here is the summary with links:
  - [bpf] xsk: harden userspace-supplied &xdp_desc validation
    https://git.kernel.org/bpf/bpf/c/07ca98f906a4

You are awesome, thank you!
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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
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Subject: [PATCH 6.1.y 09/12] timers: Add shutdown mechanism to the internal functions
Date: Sat, 11 Oct 2025 00:02:49 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit 0cc04e80458a822300b93f82ed861a513edde194 ]

Tearing down timers which have circular dependencies to other
functionality, e.g. workqueues, where the timer can schedule work and work
can arm timers, is not trivial.

In those cases it is desired to shutdown the timer in a way which prevents
rearming of the timer. The mechanism to do so is to set timer->function to
NULL and use this as an indicator for the timer arming functions to ignore
the (re)arm request.

Add a shutdown argument to the relevant internal functions which makes the
actual deactivation code set timer->function to NULL which in turn prevents
rearming of the timer.

Co-developed-by: Steven Rostedt <[email-masked]>
Signed-off-by: Steven Rostedt <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 kernel/time/timer.c | 62 +++++++++++++++++++++++++++++++++++++++------
 1 file changed, 54 insertions(+), 8 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 0b76a2ab42e3..b46614e14da1 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1300,12 +1300,19 @@ EXPORT_SYMBOL_GPL(add_timer_on);
 /**
  * __timer_delete - Internal function: Deactivate a timer
  * @timer:	The timer to be deactivated
+ * @shutdown:	If true, this indicates that the timer is about to be
+ *		shutdown permanently.
+ *
+ * If @shutdown is true then @timer->function is set to NULL under the
+ * timer base lock which prevents further rearming of the time. In that
+ * case any attempt to rearm @timer after this function returns will be
+ * silently ignored.
  *
  * Return:
  * * %0 - The timer was not pending
  * * %1 - The timer was pending and deactivated
  */
-static int __timer_delete(struct timer_list *timer)
+static int __timer_delete(struct timer_list *timer, bool shutdown)
 {
 	struct timer_base *base;
 	unsigned long flags;
@@ -1313,9 +1320,22 @@ static int __timer_delete(struct timer_list *timer)
 
 	debug_assert_init(timer);
 
-	if (timer_pending(timer)) {
+	/*
+	 * If @shutdown is set then the lock has to be taken whether the
+	 * timer is pending or not to protect against a concurrent rearm
+	 * which might hit between the lockless pending check and the lock
+	 * aquisition. By taking the lock it is ensured that such a newly
+	 * enqueued timer is dequeued and cannot end up with
+	 * timer->function == NULL in the expiry code.
+	 *
+	 * If timer->function is currently executed, then this makes sure
+	 * that the callback cannot requeue the timer.
+	 */
+	if (timer_pending(timer) || shutdown) {
 		base = lock_timer_base(timer, &flags);
 		ret = detach_if_pending(timer, base, true);
+		if (shutdown)
+			timer->function = NULL;
 		raw_spin_unlock_irqrestore(&base->lock, flags);
 	}
 
@@ -1338,20 +1358,31 @@ static int __timer_delete(struct timer_list *timer)
  */
 int timer_delete(struct timer_list *timer)
 {
-	return __timer_delete(timer);
+	return __timer_delete(timer, false);
 }
 EXPORT_SYMBOL(timer_delete);
 
 /**
  * __try_to_del_timer_sync - Internal function: Try to deactivate a timer
  * @timer:	Timer to deactivate
+ * @shutdown:	If true, this indicates that the timer is about to be
+ *		shutdown permanently.
+ *
+ * If @shutdown is true then @timer->function is set to NULL under the
+ * timer base lock which prevents further rearming of the timer. Any
+ * attempt to rearm @timer after this function returns will be silently
+ * ignored.
+ *
+ * This function cannot guarantee that the timer cannot be rearmed
+ * right after dropping the base lock if @shutdown is false. That
+ * needs to be prevented by the calling code if necessary.
  *
  * Return:
  * * %0  - The timer was not pending
  * * %1  - The timer was pending and deactivated
  * * %-1 - The timer callback function is running on a different CPU
  */
-static int __try_to_del_timer_sync(struct timer_list *timer)
+static int __try_to_del_timer_sync(struct timer_list *timer, bool shutdown)
 {
 	struct timer_base *base;
 	unsigned long flags;
@@ -1363,6 +1394,8 @@ static int __try_to_del_timer_sync(struct timer_list *timer)
 
 	if (base->running_timer != timer)
 		ret = detach_if_pending(timer, base, true);
+	if (shutdown)
+		timer->function = NULL;
 
 	raw_spin_unlock_irqrestore(&base->lock, flags);
 
@@ -1387,7 +1420,7 @@ static int __try_to_del_timer_sync(struct timer_list *timer)
  */
 int try_to_del_timer_sync(struct timer_list *timer)
 {
-	return __try_to_del_timer_sync(timer);
+	return __try_to_del_timer_sync(timer, false);
 }
 EXPORT_SYMBOL(try_to_del_timer_sync);
 
@@ -1468,12 +1501,25 @@ static inline void del_timer_wait_running(struct timer_list *timer) { }
  * __timer_delete_sync - Internal function: Deactivate a timer and wait
  *			 for the handler to finish.
  * @timer:	The timer to be deactivated
+ * @shutdown:	If true, @timer->function will be set to NULL under the
+ *		timer base lock which prevents rearming of @timer
+ *
+ * If @shutdown is not set the timer can be rearmed later. If the timer can
+ * be rearmed concurrently, i.e. after dropping the base lock then the
+ * return value is meaningless.
+ *
+ * If @shutdown is set then @timer->function is set to NULL under timer
+ * base lock which prevents rearming of the timer. Any attempt to rearm
+ * a shutdown timer is silently ignored.
+ *
+ * If the timer should be reused after shutdown it has to be initialized
+ * again.
  *
  * Return:
  * * %0	- The timer was not pending
  * * %1	- The timer was pending and deactivated
  */
-static int __timer_delete_sync(struct timer_list *timer)
+static int __timer_delete_sync(struct timer_list *timer, bool shutdown)
 {
 	int ret;
 
@@ -1503,7 +1549,7 @@ static int __timer_delete_sync(struct timer_list *timer)
 		lockdep_assert_preemption_enabled();
 
 	do {
-		ret = __try_to_del_timer_sync(timer);
+		ret = __try_to_del_timer_sync(timer, shutdown);
 
 		if (unlikely(ret < 0)) {
 			del_timer_wait_running(timer);
@@ -1555,7 +1601,7 @@ static int __timer_delete_sync(struct timer_list *timer)
  */
 int timer_delete_sync(struct timer_list *timer)
 {
-	return __timer_delete_sync(timer);
+	return __timer_delete_sync(timer, false);
 }
 EXPORT_SYMBOL(timer_delete_sync);
 
--

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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: [email-masked],
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Subject: [PATCH 6.1.y 10/12] timers: Provide timer_shutdown[_sync]()
Date: Sat, 11 Oct 2025 00:02:50 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit f571faf6e443b6011ccb585d57866177af1f643c ]

Tearing down timers which have circular dependencies to other
functionality, e.g. workqueues, where the timer can schedule work and work
can arm timers, is not trivial.

In those cases it is desired to shutdown the timer in a way which prevents
rearming of the timer. The mechanism to do so is to set timer->function to
NULL and use this as an indicator for the timer arming functions to ignore
the (re)arm request.

Expose new interfaces for this: timer_shutdown_sync() and timer_shutdown().

timer_shutdown_sync() has the same functionality as timer_delete_sync()
plus the NULL-ification of the timer function.

timer_shutdown() has the same functionality as timer_delete() plus the
NULL-ification of the timer function.

In both cases the rearming of the timer is prevented by silently discarding
rearm attempts due to timer->function being NULL.

Co-developed-by: Steven Rostedt <[email-masked]>
Signed-off-by: Steven Rostedt <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 include/linux/timer.h |  2 ++
 kernel/time/timer.c   | 66 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/include/linux/timer.h b/include/linux/timer.h
index e338e173ce8b..9162f275819a 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -184,6 +184,8 @@ extern void add_timer(struct timer_list *timer);
 extern int try_to_del_timer_sync(struct timer_list *timer);
 extern int timer_delete_sync(struct timer_list *timer);
 extern int timer_delete(struct timer_list *timer);
+extern int timer_shutdown_sync(struct timer_list *timer);
+extern int timer_shutdown(struct timer_list *timer);
 
 /**
  * del_timer_sync - Delete a pending timer and wait for a running callback
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index b46614e14da1..4f39025ac933 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1362,6 +1362,27 @@ int timer_delete(struct timer_list *timer)
 }
 EXPORT_SYMBOL(timer_delete);
 
+/**
+ * timer_shutdown - Deactivate a timer and prevent rearming
+ * @timer:	The timer to be deactivated
+ *
+ * The function does not wait for an eventually running timer callback on a
+ * different CPU but it prevents rearming of the timer. Any attempt to arm
+ * @timer after this function returns will be silently ignored.
+ *
+ * This function is useful for teardown code and should only be used when
+ * timer_shutdown_sync() cannot be invoked due to locking or context constraints.
+ *
+ * Return:
+ * * %0 - The timer was not pending
+ * * %1 - The timer was pending
+ */
+int timer_shutdown(struct timer_list *timer)
+{
+	return __timer_delete(timer, true);
+}
+EXPORT_SYMBOL_GPL(timer_shutdown);
+
 /**
  * __try_to_del_timer_sync - Internal function: Try to deactivate a timer
  * @timer:	Timer to deactivate
@@ -1595,6 +1616,9 @@ static int __timer_delete_sync(struct timer_list *timer, bool shutdown)
  * lock. If there is the possibility of a concurrent rearm then the return
  * value of the function is meaningless.
  *
+ * If such a guarantee is needed, e.g. for teardown situations then use
+ * timer_shutdown_sync() instead.
+ *
  * Return:
  * * %0	- The timer was not pending
  * * %1	- The timer was pending and deactivated
@@ -1605,6 +1629,48 @@ int timer_delete_sync(struct timer_list *timer)
 }
 EXPORT_SYMBOL(timer_delete_sync);
 
+/**
+ * timer_shutdown_sync - Shutdown a timer and prevent rearming
+ * @timer: The timer to be shutdown
+ *
+ * When the function returns it is guaranteed that:
+ *   - @timer is not queued
+ *   - The callback function of @timer is not running
+ *   - @timer cannot be enqueued again. Any attempt to rearm
+ *     @timer is silently ignored.
+ *
+ * See timer_delete_sync() for synchronization rules.
+ *
+ * This function is useful for final teardown of an infrastructure where
+ * the timer is subject to a circular dependency problem.
+ *
+ * A common pattern for this is a timer and a workqueue where the timer can
+ * schedule work and work can arm the timer. On shutdown the workqueue must
+ * be destroyed and the timer must be prevented from rearming. Unless the
+ * code has conditionals like 'if (mything->in_shutdown)' to prevent that
+ * there is no way to get this correct with timer_delete_sync().
+ *
+ * timer_shutdown_sync() is solving the problem. The correct ordering of
+ * calls in this case is:
+ *
+ *	timer_shutdown_sync(&mything->timer);
+ *	workqueue_destroy(&mything->workqueue);
+ *
+ * After this 'mything' can be safely freed.
+ *
+ * This obviously implies that the timer is not required to be functional
+ * for the rest of the shutdown operation.
+ *
+ * Return:
+ * * %0 - The timer was not pending
+ * * %1 - The timer was pending
+ */
+int timer_shutdown_sync(struct timer_list *timer)
+{
+	return __timer_delete_sync(timer, true);
+}
+EXPORT_SYMBOL_GPL(timer_shutdown_sync);
+
 static void call_timer_fn(struct timer_list *timer,
 			  void (*fn)(struct timer_list *),
 			  unsigned long baseclk)
--

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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: [email-masked],
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	Jeongjun Park <[email-masked]>
Subject: [PATCH 6.1.y 11/12] timers: Update the documentation to reflect on the new timer_shutdown() API
Date: Sat, 11 Oct 2025 00:02:51 +0900
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From: "Steven Rostedt (Google)" <[email-masked]>

[ Upstream commit a31323bef2b66455920d054b160c17d4240f8fd4 ]

In order to make sure that a timer is not re-armed after it is stopped
before freeing, a new shutdown state is added to the timer code. The API
timer_shutdown_sync() and timer_shutdown() must be called before the
object that holds the timer can be freed.

Update the documentation to reflect this new workflow.

[ tglx: Updated to the new semantics and updated the zh_CN version ]

Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 Documentation/RCU/Design/Requirements/Requirements.rst  | 2 +-
 Documentation/core-api/local_ops.rst                    | 2 +-
 Documentation/kernel-hacking/locking.rst                | 5 +++++
 Documentation/translations/zh_CN/core-api/local_ops.rst | 2 +-
 4 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Documentation/RCU/Design/Requirements/Requirements.rst b/Documentation/RCU/Design/Requirements/Requirements.rst
index 546f23abeca3..49387d823619 100644
--- a/Documentation/RCU/Design/Requirements/Requirements.rst
+++ b/Documentation/RCU/Design/Requirements/Requirements.rst
@@ -1858,7 +1858,7 @@ unloaded. After a given module has been unloaded, any attempt to call
 one of its functions results in a segmentation fault. The module-unload
 functions must therefore cancel any delayed calls to loadable-module
 functions, for example, any outstanding mod_timer() must be dealt
-with via timer_delete_sync() or similar.
+with via timer_shutdown_sync() or similar.
 
 Unfortunately, there is no way to cancel an RCU callback; once you
 invoke call_rcu(), the callback function is eventually going to be
diff --git a/Documentation/core-api/local_ops.rst b/Documentation/core-api/local_ops.rst
index a84f8b0c7ab2..0b42ceaaf3c4 100644
--- a/Documentation/core-api/local_ops.rst
+++ b/Documentation/core-api/local_ops.rst
@@ -191,7 +191,7 @@ Here is a sample module which implements a basic per cpu counter using
 
     static void __exit test_exit(void)
     {
-            timer_delete_sync(&test_timer);
+            timer_shutdown_sync(&test_timer);
     }
 
     module_init(test_init);
diff --git a/Documentation/kernel-hacking/locking.rst b/Documentation/kernel-hacking/locking.rst
index c447d55fa080..3bbb11ba647a 100644
--- a/Documentation/kernel-hacking/locking.rst
+++ b/Documentation/kernel-hacking/locking.rst
@@ -1007,6 +1007,11 @@ calling add_timer() at the end of their timer function).
 Because this is a fairly common case which is prone to races, you should
 use timer_delete_sync() (``include/linux/timer.h``) to
 
+Before freeing a timer, timer_shutdown() or timer_shutdown_sync() should be
+called which will keep it from being rearmed. Any subsequent attempt to
+rearm the timer will be silently ignored by the core code.
+
+
 Locking Speed
 =============
 
diff --git a/Documentation/translations/zh_CN/core-api/local_ops.rst b/Documentation/translations/zh_CN/core-api/local_ops.rst
index 22493b9b829c..eb5423f60f17 100644
--- a/Documentation/translations/zh_CN/core-api/local_ops.rst
+++ b/Documentation/translations/zh_CN/core-api/local_ops.rst
@@ -185,7 +185,7 @@ UP之间没有不同的行为，在你的架构的 ``local.h`` 中包括 ``asm-g
 
     static void __exit test_exit(void)
     {
-            timer_delete_sync(&test_timer);
+            timer_shutdown_sync(&test_timer);
     }
 
     module_init(test_init);
--

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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: [email-masked],
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	[email-masked],
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	Jeongjun Park <[email-masked]>
Subject: [PATCH 6.1.y 07/12] timers: Silently ignore timers with a NULL function
Date: Sat, 11 Oct 2025 00:02:47 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit d02e382cef06cc73561dd32dfdc171c00dcc416d ]

Tearing down timers which have circular dependencies to other
functionality, e.g. workqueues, where the timer can schedule work and work
can arm timers, is not trivial.

In those cases it is desired to shutdown the timer in a way which prevents
rearming of the timer. The mechanism to do so is to set timer->function to
NULL and use this as an indicator for the timer arming functions to ignore
the (re)arm request.

In preparation for that replace the warnings in the relevant code paths
with checks for timer->function == NULL. If the pointer is NULL, then
discard the rearm request silently.

Add debug_assert_init() instead of the WARN_ON_ONCE(!timer->function)
checks so that debug objects can warn about non-initialized timers.

The warning of debug objects does not warn if timer->function == NULL.  It
warns when timer was not initialized using timer_setup[_on_stack]() or via
DEFINE_TIMER(). If developers fail to enable debug objects and then waste
lots of time to figure out why their non-initialized timer is not firing,
they deserve it. Same for initializing a timer with a NULL function.

Co-developed-by: Steven Rostedt <[email-masked]>
Signed-off-by: Steven Rostedt <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/r/87wn7kdann.ffs@tglx
Signed-off-by: Jeongjun Park <[email-masked]>
---
 kernel/time/timer.c | 57 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 52 insertions(+), 5 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 7094b916c854..3b6624cd9507 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1017,7 +1017,7 @@ __mod_timer(struct timer_list *timer, unsigned long expires, unsigned int option
 	unsigned int idx = UINT_MAX;
 	int ret = 0;
 
-	BUG_ON(!timer->function);
+	debug_assert_init(timer);
 
 	/*
 	 * This is a common optimization triggered by the networking code - if
@@ -1044,6 +1044,14 @@ __mod_timer(struct timer_list *timer, unsigned long expires, unsigned int option
 		 * dequeue/enqueue dance.
 		 */
 		base = lock_timer_base(timer, &flags);
+		/*
+		 * Has @timer been shutdown? This needs to be evaluated
+		 * while holding base lock to prevent a race against the
+		 * shutdown code.
+		 */
+		if (!timer->function)
+			goto out_unlock;
+
 		forward_timer_base(base);
 
 		if (timer_pending(timer) && (options & MOD_TIMER_REDUCE) &&
@@ -1070,6 +1078,14 @@ __mod_timer(struct timer_list *timer, unsigned long expires, unsigned int option
 		}
 	} else {
 		base = lock_timer_base(timer, &flags);
+		/*
+		 * Has @timer been shutdown? This needs to be evaluated
+		 * while holding base lock to prevent a race against the
+		 * shutdown code.
+		 */
+		if (!timer->function)
+			goto out_unlock;
+
 		forward_timer_base(base);
 	}
 
@@ -1128,8 +1144,12 @@ __mod_timer(struct timer_list *timer, unsigned long expires, unsigned int option
  * mod_timer_pending() is the same for pending timers as mod_timer(), but
  * will not activate inactive timers.
  *
+ * If @timer->function == NULL then the start operation is silently
+ * discarded.
+ *
  * Return:
- * * %0 - The timer was inactive and not modified
+ * * %0 - The timer was inactive and not modified or was in
+ *	  shutdown state and the operation was discarded
  * * %1 - The timer was active and requeued to expire at @expires
  */
 int mod_timer_pending(struct timer_list *timer, unsigned long expires)
@@ -1155,8 +1175,12 @@ EXPORT_SYMBOL(mod_timer_pending);
  * same timer, then mod_timer() is the only safe way to modify the timeout,
  * since add_timer() cannot modify an already running timer.
  *
+ * If @timer->function == NULL then the start operation is silently
+ * discarded. In this case the return value is 0 and meaningless.
+ *
  * Return:
- * * %0 - The timer was inactive and started
+ * * %0 - The timer was inactive and started or was in shutdown
+ *	  state and the operation was discarded
  * * %1 - The timer was active and requeued to expire at @expires or
  *	  the timer was active and not modified because @expires did
  *	  not change the effective expiry time
@@ -1176,8 +1200,12 @@ EXPORT_SYMBOL(mod_timer);
  * modify an enqueued timer if that would reduce the expiration time. If
  * @timer is not enqueued it starts the timer.
  *
+ * If @timer->function == NULL then the start operation is silently
+ * discarded.
+ *
  * Return:
- * * %0 - The timer was inactive and started
+ * * %0 - The timer was inactive and started or was in shutdown
+ *	  state and the operation was discarded
  * * %1 - The timer was active and requeued to expire at @expires or
  *	  the timer was active and not modified because @expires
  *	  did not change the effective expiry time such that the
@@ -1200,6 +1228,9 @@ EXPORT_SYMBOL(timer_reduce);
  * The @timer->expires and @timer->function fields must be set prior
  * to calling this function.
  *
+ * If @timer->function == NULL then the start operation is silently
+ * discarded.
+ *
  * If @timer->expires is already in the past @timer will be queued to
  * expire at the next timer tick.
  *
@@ -1228,7 +1259,9 @@ void add_timer_on(struct timer_list *timer, int cpu)
 	struct timer_base *new_base, *base;
 	unsigned long flags;
 
-	if (WARN_ON_ONCE(timer_pending(timer) || !timer->function))
+	debug_assert_init(timer);
+
+	if (WARN_ON_ONCE(timer_pending(timer)))
 		return;
 
 	new_base = get_timer_cpu_base(timer->flags, cpu);
@@ -1239,6 +1272,13 @@ void add_timer_on(struct timer_list *timer, int cpu)
 	 * wrong base locked.  See lock_timer_base().
 	 */
 	base = lock_timer_base(timer, &flags);
+	/*
+	 * Has @timer been shutdown? This needs to be evaluated while
+	 * holding base lock to prevent a race against the shutdown code.
+	 */
+	if (!timer->function)
+		goto out_unlock;
+
 	if (base != new_base) {
 		timer->flags |= TIMER_MIGRATING;
 
@@ -1252,6 +1292,7 @@ void add_timer_on(struct timer_list *timer, int cpu)
 
 	debug_timer_activate(timer);
 	internal_add_timer(base, timer);
+out_unlock:
 	raw_spin_unlock_irqrestore(&base->lock, flags);
 }
 EXPORT_SYMBOL_GPL(add_timer_on);
@@ -1541,6 +1582,12 @@ static void expire_timers(struct timer_base *base, struct hlist_head *head)
 
 		fn = timer->function;
 
+		if (WARN_ON_ONCE(!fn)) {
+			/* Should never happen. Emphasis on should! */
+			base->running_timer = NULL;
+			continue;
+		}
+
 		if (timer->flags & TIMER_IRQSAFE) {
 			raw_spin_unlock(&base->lock);
 			call_timer_fn(timer, fn, baseclk);
--

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Subject: [PATCH 6.1.y 08/12] timers: Split [try_to_]del_timer[_sync]() to prepare for shutdown mode
Date: Sat, 11 Oct 2025 00:02:48 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit 8553b5f2774a66b1f293b7d783934210afb8f23c ]

Tearing down timers which have circular dependencies to other
functionality, e.g. workqueues, where the timer can schedule work and work
can arm timers, is not trivial.

In those cases it is desired to shutdown the timer in a way which prevents
rearming of the timer. The mechanism to do so is to set timer->function to
NULL and use this as an indicator for the timer arming functions to ignore
the (re)arm request.

Split the inner workings of try_do_del_timer_sync(), del_timer_sync() and
del_timer() into helper functions to prepare for implementing the shutdown
functionality.

No functional change.

Co-developed-by: Steven Rostedt <[email-masked]>
Signed-off-by: Steven Rostedt <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 kernel/time/timer.c | 143 ++++++++++++++++++++++++++++----------------
 1 file changed, 92 insertions(+), 51 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 3b6624cd9507..0b76a2ab42e3 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1298,20 +1298,14 @@ void add_timer_on(struct timer_list *timer, int cpu)
 EXPORT_SYMBOL_GPL(add_timer_on);
 
 /**
- * timer_delete - Deactivate a timer
+ * __timer_delete - Internal function: Deactivate a timer
  * @timer:	The timer to be deactivated
  *
- * The function only deactivates a pending timer, but contrary to
- * timer_delete_sync() it does not take into account whether the timer's
- * callback function is concurrently executed on a different CPU or not.
- * It neither prevents rearming of the timer. If @timer can be rearmed
- * concurrently then the return value of this function is meaningless.
- *
  * Return:
  * * %0 - The timer was not pending
  * * %1 - The timer was pending and deactivated
  */
-int timer_delete(struct timer_list *timer)
+static int __timer_delete(struct timer_list *timer)
 {
 	struct timer_base *base;
 	unsigned long flags;
@@ -1327,25 +1321,37 @@ int timer_delete(struct timer_list *timer)
 
 	return ret;
 }
-EXPORT_SYMBOL(timer_delete);
 
 /**
- * try_to_del_timer_sync - Try to deactivate a timer
- * @timer:	Timer to deactivate
+ * timer_delete - Deactivate a timer
+ * @timer:	The timer to be deactivated
  *
- * This function tries to deactivate a timer. On success the timer is not
- * queued and the timer callback function is not running on any CPU.
+ * The function only deactivates a pending timer, but contrary to
+ * timer_delete_sync() it does not take into account whether the timer's
+ * callback function is concurrently executed on a different CPU or not.
+ * It neither prevents rearming of the timer.  If @timer can be rearmed
+ * concurrently then the return value of this function is meaningless.
  *
- * This function does not guarantee that the timer cannot be rearmed right
- * after dropping the base lock. That needs to be prevented by the calling
- * code if necessary.
+ * Return:
+ * * %0 - The timer was not pending
+ * * %1 - The timer was pending and deactivated
+ */
+int timer_delete(struct timer_list *timer)
+{
+	return __timer_delete(timer);
+}
+EXPORT_SYMBOL(timer_delete);
+
+/**
+ * __try_to_del_timer_sync - Internal function: Try to deactivate a timer
+ * @timer:	Timer to deactivate
  *
  * Return:
  * * %0  - The timer was not pending
  * * %1  - The timer was pending and deactivated
  * * %-1 - The timer callback function is running on a different CPU
  */
-int try_to_del_timer_sync(struct timer_list *timer)
+static int __try_to_del_timer_sync(struct timer_list *timer)
 {
 	struct timer_base *base;
 	unsigned long flags;
@@ -1362,6 +1368,27 @@ int try_to_del_timer_sync(struct timer_list *timer)
 
 	return ret;
 }
+
+/**
+ * try_to_del_timer_sync - Try to deactivate a timer
+ * @timer:	Timer to deactivate
+ *
+ * This function tries to deactivate a timer. On success the timer is not
+ * queued and the timer callback function is not running on any CPU.
+ *
+ * This function does not guarantee that the timer cannot be rearmed right
+ * after dropping the base lock. That needs to be prevented by the calling
+ * code if necessary.
+ *
+ * Return:
+ * * %0  - The timer was not pending
+ * * %1  - The timer was pending and deactivated
+ * * %-1 - The timer callback function is running on a different CPU
+ */
+int try_to_del_timer_sync(struct timer_list *timer)
+{
+	return __try_to_del_timer_sync(timer);
+}
 EXPORT_SYMBOL(try_to_del_timer_sync);
 
 #ifdef CONFIG_PREEMPT_RT
@@ -1438,45 +1465,15 @@ static inline void del_timer_wait_running(struct timer_list *timer) { }
 #endif
 
 /**
- * timer_delete_sync - Deactivate a timer and wait for the handler to finish.
+ * __timer_delete_sync - Internal function: Deactivate a timer and wait
+ *			 for the handler to finish.
  * @timer:	The timer to be deactivated
  *
- * Synchronization rules: Callers must prevent restarting of the timer,
- * otherwise this function is meaningless. It must not be called from
- * interrupt contexts unless the timer is an irqsafe one. The caller must
- * not hold locks which would prevent completion of the timer's callback
- * function. The timer's handler must not call add_timer_on(). Upon exit
- * the timer is not queued and the handler is not running on any CPU.
- *
- * For !irqsafe timers, the caller must not hold locks that are held in
- * interrupt context. Even if the lock has nothing to do with the timer in
- * question.  Here's why::
- *
- *    CPU0                             CPU1
- *    ----                             ----
- *                                     <SOFTIRQ>
- *                                       call_timer_fn();
- *                                       base->running_timer = mytimer;
- *    spin_lock_irq(somelock);
- *                                     <IRQ>
- *                                        spin_lock(somelock);
- *    timer_delete_sync(mytimer);
- *    while (base->running_timer == mytimer);
- *
- * Now timer_delete_sync() will never return and never release somelock.
- * The interrupt on the other CPU is waiting to grab somelock but it has
- * interrupted the softirq that CPU0 is waiting to finish.
- *
- * This function cannot guarantee that the timer is not rearmed again by
- * some concurrent or preempting code, right after it dropped the base
- * lock. If there is the possibility of a concurrent rearm then the return
- * value of the function is meaningless.
- *
  * Return:
  * * %0	- The timer was not pending
  * * %1	- The timer was pending and deactivated
  */
-int timer_delete_sync(struct timer_list *timer)
+static int __timer_delete_sync(struct timer_list *timer)
 {
 	int ret;
 
@@ -1506,7 +1503,7 @@ int timer_delete_sync(struct timer_list *timer)
 		lockdep_assert_preemption_enabled();
 
 	do {
-		ret = try_to_del_timer_sync(timer);
+		ret = __try_to_del_timer_sync(timer);
 
 		if (unlikely(ret < 0)) {
 			del_timer_wait_running(timer);
@@ -1516,6 +1513,50 @@ int timer_delete_sync(struct timer_list *timer)
 
 	return ret;
 }
+
+/**
+ * timer_delete_sync - Deactivate a timer and wait for the handler to finish.
+ * @timer:	The timer to be deactivated
+ *
+ * Synchronization rules: Callers must prevent restarting of the timer,
+ * otherwise this function is meaningless. It must not be called from
+ * interrupt contexts unless the timer is an irqsafe one. The caller must
+ * not hold locks which would prevent completion of the timer's callback
+ * function. The timer's handler must not call add_timer_on(). Upon exit
+ * the timer is not queued and the handler is not running on any CPU.
+ *
+ * For !irqsafe timers, the caller must not hold locks that are held in
+ * interrupt context. Even if the lock has nothing to do with the timer in
+ * question.  Here's why::
+ *
+ *    CPU0                             CPU1
+ *    ----                             ----
+ *                                     <SOFTIRQ>
+ *                                       call_timer_fn();
+ *                                       base->running_timer = mytimer;
+ *    spin_lock_irq(somelock);
+ *                                     <IRQ>
+ *                                        spin_lock(somelock);
+ *    timer_delete_sync(mytimer);
+ *    while (base->running_timer == mytimer);
+ *
+ * Now timer_delete_sync() will never return and never release somelock.
+ * The interrupt on the other CPU is waiting to grab somelock but it has
+ * interrupted the softirq that CPU0 is waiting to finish.
+ *
+ * This function cannot guarantee that the timer is not rearmed again by
+ * some concurrent or preempting code, right after it dropped the base
+ * lock. If there is the possibility of a concurrent rearm then the return
+ * value of the function is meaningless.
+ *
+ * Return:
+ * * %0	- The timer was not pending
+ * * %1	- The timer was pending and deactivated
+ */
+int timer_delete_sync(struct timer_list *timer)
+{
+	return __timer_delete_sync(timer);
+}
 EXPORT_SYMBOL(timer_delete_sync);
 
 static void call_timer_fn(struct timer_list *timer,
--

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To: [email-masked]
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Subject: [PATCH 6.1.y 04/12] clocksource/drivers/sp804: Do not use timer namespace for timer_shutdown() function
Date: Sat, 11 Oct 2025 00:02:44 +0900
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From: "Steven Rostedt (Google)" <[email-masked]>

[ Upstream commit 6e1fc2591f116dfb20b65cf27356475461d61bd8 ]

A new "shutdown" timer state is being added to the generic timer code. One
of the functions to change the timer into the state is called
"timer_shutdown()". This means that there can not be other functions
called "timer_shutdown()" as the timer code owns the "timer_*" name space.

Rename timer_shutdown() to evt_timer_shutdown() to avoid this conflict.

Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]/
Link: https://lore.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 drivers/clocksource/timer-sp804.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c
index e6a87f4af2b5..cd1916c05325 100644
--- a/drivers/clocksource/timer-sp804.c
+++ b/drivers/clocksource/timer-sp804.c
@@ -155,14 +155,14 @@ static irqreturn_t sp804_timer_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static inline void timer_shutdown(struct clock_event_device *evt)
+static inline void evt_timer_shutdown(struct clock_event_device *evt)
 {
 	writel(0, common_clkevt->ctrl);
 }
 
 static int sp804_shutdown(struct clock_event_device *evt)
 {
-	timer_shutdown(evt);
+	evt_timer_shutdown(evt);
 	return 0;
 }
 
@@ -171,7 +171,7 @@ static int sp804_set_periodic(struct clock_event_device *evt)
 	unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE |
 			     TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
 
-	timer_shutdown(evt);
+	evt_timer_shutdown(evt);
 	writel(common_clkevt->reload, common_clkevt->load);
 	writel(ctrl, common_clkevt->ctrl);
 	return 0;
--

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Subject: [PATCH 6.1.y 06/12] Documentation: Replace del_timer/del_timer_sync()
Date: Sat, 11 Oct 2025 00:02:46 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit 87bdd932e85881895d4720255b40ac28749c4e32 ]

Adjust to the new preferred function names.

Suggested-by: Steven Rostedt <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 .../RCU/Design/Requirements/Requirements.rst          |  2 +-
 Documentation/core-api/local_ops.rst                  |  2 +-
 Documentation/kernel-hacking/locking.rst              | 11 +++++------
 Documentation/timers/hrtimers.rst                     |  2 +-
 .../translations/it_IT/kernel-hacking/locking.rst     | 10 +++++-----
 .../translations/zh_CN/core-api/local_ops.rst         |  2 +-
 6 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/Documentation/RCU/Design/Requirements/Requirements.rst b/Documentation/RCU/Design/Requirements/Requirements.rst
index a0f8164c8513..546f23abeca3 100644
--- a/Documentation/RCU/Design/Requirements/Requirements.rst
+++ b/Documentation/RCU/Design/Requirements/Requirements.rst
@@ -1858,7 +1858,7 @@ unloaded. After a given module has been unloaded, any attempt to call
 one of its functions results in a segmentation fault. The module-unload
 functions must therefore cancel any delayed calls to loadable-module
 functions, for example, any outstanding mod_timer() must be dealt
-with via del_timer_sync() or similar.
+with via timer_delete_sync() or similar.
 
 Unfortunately, there is no way to cancel an RCU callback; once you
 invoke call_rcu(), the callback function is eventually going to be
diff --git a/Documentation/core-api/local_ops.rst b/Documentation/core-api/local_ops.rst
index 2ac3f9f29845..a84f8b0c7ab2 100644
--- a/Documentation/core-api/local_ops.rst
+++ b/Documentation/core-api/local_ops.rst
@@ -191,7 +191,7 @@ Here is a sample module which implements a basic per cpu counter using
 
     static void __exit test_exit(void)
     {
-            del_timer_sync(&test_timer);
+            timer_delete_sync(&test_timer);
     }
 
     module_init(test_init);
diff --git a/Documentation/kernel-hacking/locking.rst b/Documentation/kernel-hacking/locking.rst
index b26e4a3a9b7e..c447d55fa080 100644
--- a/Documentation/kernel-hacking/locking.rst
+++ b/Documentation/kernel-hacking/locking.rst
@@ -967,7 +967,7 @@ you might do the following::
 
             while (list) {
                     struct foo *next = list->next;
-                    del_timer(&list->timer);
+                    timer_delete(&list->timer);
                     kfree(list);
                     list = next;
             }
@@ -981,7 +981,7 @@ the lock after we spin_unlock_bh(), and then try to free
 the element (which has already been freed!).
 
 This can be avoided by checking the result of
-del_timer(): if it returns 1, the timer has been deleted.
+timer_delete(): if it returns 1, the timer has been deleted.
 If 0, it means (in this case) that it is currently running, so we can
 do::
 
@@ -990,7 +990,7 @@ do::
 
                     while (list) {
                             struct foo *next = list->next;
-                            if (!del_timer(&list->timer)) {
+                            if (!timer_delete(&list->timer)) {
                                     /* Give timer a chance to delete this */
                                     spin_unlock_bh(&list_lock);
                                     goto retry;
@@ -1005,8 +1005,7 @@ do::
 Another common problem is deleting timers which restart themselves (by
 calling add_timer() at the end of their timer function).
 Because this is a fairly common case which is prone to races, you should
-use del_timer_sync() (``include/linux/timer.h``) to
-handle this case.
+use timer_delete_sync() (``include/linux/timer.h``) to
 
 Locking Speed
 =============
@@ -1334,7 +1333,7 @@ lock.
 
 -  kfree()
 
--  add_timer() and del_timer()
+-  add_timer() and timer_delete()
 
 Mutex API reference
 ===================
diff --git a/Documentation/timers/hrtimers.rst b/Documentation/timers/hrtimers.rst
index c1c20a693e8f..7ac448908d1f 100644
--- a/Documentation/timers/hrtimers.rst
+++ b/Documentation/timers/hrtimers.rst
@@ -118,7 +118,7 @@ existing timer wheel code, as it is mature and well suited. Sharing code
 was not really a win, due to the different data structures. Also, the
 hrtimer functions now have clearer behavior and clearer names - such as
 hrtimer_try_to_cancel() and hrtimer_cancel() [which are roughly
-equivalent to del_timer() and del_timer_sync()] - so there's no direct
+equivalent to timer_delete() and timer_delete_sync()] - so there's no direct
 1:1 mapping between them on the algorithmic level, and thus no real
 potential for code sharing either.
 
diff --git a/Documentation/translations/it_IT/kernel-hacking/locking.rst b/Documentation/translations/it_IT/kernel-hacking/locking.rst
index eddfba806e13..b8ecf41273c5 100644
--- a/Documentation/translations/it_IT/kernel-hacking/locking.rst
+++ b/Documentation/translations/it_IT/kernel-hacking/locking.rst
@@ -990,7 +990,7 @@ potreste fare come segue::
 
             while (list) {
                     struct foo *next = list->next;
-                    del_timer(&list->timer);
+                    timer_delete(&list->timer);
                     kfree(list);
                     list = next;
             }
@@ -1003,7 +1003,7 @@ e prenderà il *lock* solo dopo spin_unlock_bh(), e cercherà
 di eliminare il suo oggetto (che però è già stato eliminato).
 
 Questo può essere evitato controllando il valore di ritorno di
-del_timer(): se ritorna 1, il temporizzatore è stato già
+timer_delete(): se ritorna 1, il temporizzatore è stato già
 rimosso. Se 0, significa (in questo caso) che il temporizzatore è in
 esecuzione, quindi possiamo fare come segue::
 
@@ -1012,7 +1012,7 @@ esecuzione, quindi possiamo fare come segue::
 
                     while (list) {
                             struct foo *next = list->next;
-                            if (!del_timer(&list->timer)) {
+                            if (!timer_delete(&list->timer)) {
                                     /* Give timer a chance to delete this */
                                     spin_unlock_bh(&list_lock);
                                     goto retry;
@@ -1026,7 +1026,7 @@ esecuzione, quindi possiamo fare come segue::
 Un altro problema è l'eliminazione dei temporizzatori che si riavviano
 da soli (chiamando add_timer() alla fine della loro esecuzione).
 Dato che questo è un problema abbastanza comune con una propensione
-alle corse critiche, dovreste usare del_timer_sync()
+alle corse critiche, dovreste usare timer_delete_sync()
 (``include/linux/timer.h``) per gestire questo caso.
 
 Velocità della sincronizzazione
@@ -1372,7 +1372,7 @@ contesto, o trattenendo un qualsiasi *lock*.
 
 -  kfree()
 
--  add_timer() e del_timer()
+-  add_timer() e timer_delete()
 
 Riferimento per l'API dei Mutex
 ===============================
diff --git a/Documentation/translations/zh_CN/core-api/local_ops.rst b/Documentation/translations/zh_CN/core-api/local_ops.rst
index 41e4525038e8..22493b9b829c 100644
--- a/Documentation/translations/zh_CN/core-api/local_ops.rst
+++ b/Documentation/translations/zh_CN/core-api/local_ops.rst
@@ -185,7 +185,7 @@ UP之间没有不同的行为，在你的架构的 ``local.h`` 中包括 ``asm-g
 
     static void __exit test_exit(void)
     {
-            del_timer_sync(&test_timer);
+            timer_delete_sync(&test_timer);
     }
 
     module_init(test_init);
--

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Subject: [PATCH 6.1.y 05/12] timers: Replace BUG_ON()s
Date: Sat, 11 Oct 2025 00:02:45 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit 82ed6f7ef58f9634fe4462dd721902c580f01569 ]

The timer code still has a few BUG_ON()s left which are crashing the kernel
in situations where it still can recover or simply refuse to take an
action.

Remove the one in the hotplug callback which checks for the CPU being
offline. If that happens then the whole hotplug machinery will explode in
colourful ways.

Replace the rest with WARN_ON_ONCE() and conditional returns where
appropriate.

Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 kernel/time/timer.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index e09852be4e63..7094b916c854 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1208,7 +1208,8 @@ EXPORT_SYMBOL(timer_reduce);
  */
 void add_timer(struct timer_list *timer)
 {
-	BUG_ON(timer_pending(timer));
+	if (WARN_ON_ONCE(timer_pending(timer)))
+		return;
 	__mod_timer(timer, timer->expires, MOD_TIMER_NOTPENDING);
 }
 EXPORT_SYMBOL(add_timer);
@@ -1227,7 +1228,8 @@ void add_timer_on(struct timer_list *timer, int cpu)
 	struct timer_base *new_base, *base;
 	unsigned long flags;
 
-	BUG_ON(timer_pending(timer) || !timer->function);
+	if (WARN_ON_ONCE(timer_pending(timer) || !timer->function))
+		return;
 
 	new_base = get_timer_cpu_base(timer->flags, cpu);
 
@@ -2047,8 +2049,6 @@ int timers_dead_cpu(unsigned int cpu)
 	struct timer_base *new_base;
 	int b, i;
 
-	BUG_ON(cpu_online(cpu));
-
 	for (b = 0; b < NR_BASES; b++) {
 		old_base = per_cpu_ptr(&timer_bases[b], cpu);
 		new_base = get_cpu_ptr(&timer_bases[b]);
@@ -2065,7 +2065,8 @@ int timers_dead_cpu(unsigned int cpu)
 		 */
 		forward_timer_base(new_base);
 
-		BUG_ON(old_base->running_timer);
+		WARN_ON_ONCE(old_base->running_timer);
+		old_base->running_timer = NULL;
 
 		for (i = 0; i < WHEEL_SIZE; i++)
 			migrate_timer_list(new_base, old_base->vectors + i);
--

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From: Jeongjun Park <[email-masked]>
To: [email-masked]
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Subject: [PATCH 6.1.y 03/12] clocksource/drivers/arm_arch_timer: Do not use timer namespace for timer_shutdown() function
Date: Sat, 11 Oct 2025 00:02:43 +0900
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From: "Steven Rostedt (Google)" <[email-masked]>

[ Upstream commit 73737a5833ace25a8408b0d3b783637cb6bf29d1 ]

A new "shutdown" timer state is being added to the generic timer code. One
of the functions to change the timer into the state is called
"timer_shutdown()". This means that there can not be other functions
called "timer_shutdown()" as the timer code owns the "timer_*" name space.

Rename timer_shutdown() to arch_timer_shutdown() to avoid this conflict.

Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Acked-by: Marc Zyngier <[email-masked]>
Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]/
Link: https://lore.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 drivers/clocksource/arm_arch_timer.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index fee1c4bf1021..ddcbf2b19651 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -687,8 +687,8 @@ static irqreturn_t arch_timer_handler_virt_mem(int irq, void *dev_id)
 	return timer_handler(ARCH_TIMER_MEM_VIRT_ACCESS, evt);
 }
 
-static __always_inline int timer_shutdown(const int access,
-					  struct clock_event_device *clk)
+static __always_inline int arch_timer_shutdown(const int access,
+					       struct clock_event_device *clk)
 {
 	unsigned long ctrl;
 
@@ -701,22 +701,22 @@ static __always_inline int timer_shutdown(const int access,
 
 static int arch_timer_shutdown_virt(struct clock_event_device *clk)
 {
-	return timer_shutdown(ARCH_TIMER_VIRT_ACCESS, clk);
+	return arch_timer_shutdown(ARCH_TIMER_VIRT_ACCESS, clk);
 }
 
 static int arch_timer_shutdown_phys(struct clock_event_device *clk)
 {
-	return timer_shutdown(ARCH_TIMER_PHYS_ACCESS, clk);
+	return arch_timer_shutdown(ARCH_TIMER_PHYS_ACCESS, clk);
 }
 
 static int arch_timer_shutdown_virt_mem(struct clock_event_device *clk)
 {
-	return timer_shutdown(ARCH_TIMER_MEM_VIRT_ACCESS, clk);
+	return arch_timer_shutdown(ARCH_TIMER_MEM_VIRT_ACCESS, clk);
 }
 
 static int arch_timer_shutdown_phys_mem(struct clock_event_device *clk)
 {
-	return timer_shutdown(ARCH_TIMER_MEM_PHYS_ACCESS, clk);
+	return arch_timer_shutdown(ARCH_TIMER_MEM_PHYS_ACCESS, clk);
 }
 
 static __always_inline void set_next_event(const int access, unsigned long evt,
--

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Date: Fri, 10 Oct 2025 13:12:57 +0530
Subject: Re: [PATCH 0/4] drm/tidss: Fixes data edge sampling
To: Louis Chauvet <[email-masked]>, Jyri Sarha <[email-masked]>,
        Tomi Valkeinen <[email-masked]>,
        Maarten Lankhorst
	<[email-masked]>,
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CC: <[email-masked]>, Jyri Sarha <[email-masked]>,
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From: Swamil Jain <[email-masked]>
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Hi Louis,

On 30-07-2025 22:32, Louis Chauvet wrote:
> Currently the driver only configure the data edge sampling partially. The
> AM62 require it to be configured in two distincts registers: one in tidss
> and one in the general device registers.
> 
> Introduce a new dt property to link the proper syscon node from the main
> device registers into the tidss driver.
> 
> Fixes: 32a1795f57ee ("drm/tidss: New driver for TI Keystone platform Display SubSystem")
> ---
> Cc: [email-masked]
> 
> Signed-off-by: Louis Chauvet <[email-masked]>
> 
> ---

Just wanted to check if you're planning to send a v2?

Regards,
Swamil

> Louis Chauvet (4):
>        dt-bindings: display: ti,am65x-dss: Add clk property for data edge synchronization
>        dt-bindings: mfd: syscon: Add ti,am625-dss-clk-ctrl
>        arm64: dts: ti: k3-am62-main: Add tidss clk-ctrl property
>        drm/tidss: Fix sampling edge configuration
> 
>   .../devicetree/bindings/display/ti/ti,am65x-dss.yaml       |  6 ++++++
>   Documentation/devicetree/bindings/mfd/syscon.yaml          |  3 ++-
>   arch/arm64/boot/dts/ti/k3-am62-main.dtsi                   |  6 ++++++
>   drivers/gpu/drm/tidss/tidss_dispc.c                        | 14 ++++++++++++++
>   4 files changed, 28 insertions(+), 1 deletion(-)
> ---
> base-commit: 85c23f28905cf20a86ceec3cfd7a0a5572c9eb13
> change-id: 20250730-fix-edge-handling-9123f7438910
> 
> Best regards,

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Date: Fri, 10 Oct 2025 12:52:56 +0200
From: Greg KH <[email-masked]>
To: Shivani Agarwal <[email-masked]>, [email-masked],
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Subject: Re: [PATCH v6.1] smb: prevent use-after-free due to open_cached_dir
 error paths
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On Thu, Oct 09, 2025 at 08:00:33PM -0700, Paul Aurich wrote:
> Thanks for proposing this!  I think this backport has the problem I was
> concerned with when Cliff Liu proposed a backport in March [1].
> 
> The handling of the 'has_lease' field in this patch depends on work done by
> two other patches, and those should be backported before this one:
> 
> - 5c86919455c1 ("smb: client: fix use-after-free in
> smb2_query_info_compound()")
> - 7afb86733685 ("smb: Don't leak cfid when reconnect races with
> open_cached_dir")
> 
> I have (somewhere...) a backport of all three of these patches three patches
> to linux-6.1.y, but it was a while ago and I never found the time to _test_
> the backports.

Now dropped from the queue, thanks for the review.

greg k-h

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Subject: [PATCH 6.1.y 01/12] Documentation: Remove bogus claim about del_timer_sync()
Date: Sat, 11 Oct 2025 00:02:41 +0900
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From: Thomas Gleixner <[email-masked]>

[ Upstream commit b0b0aa5d858d4d2fe39a5e4486e0550e858108f6 ]

del_timer_sync() does not return the number of times it tried to delete the
timer which rearms itself. It's clearly documented:

 The function returns whether it has deactivated a pending timer or not.

This part of the documentation is from 2003 where del_timer_sync() really
returned the number of deletion attempts for unknown reasons. The code
was rewritten in 2005, but the documentation was not updated.

Signed-off-by: Thomas Gleixner <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 Documentation/kernel-hacking/locking.rst                    | 3 +--
 Documentation/translations/it_IT/kernel-hacking/locking.rst | 4 +---
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/Documentation/kernel-hacking/locking.rst b/Documentation/kernel-hacking/locking.rst
index 6805ae6e86e6..b26e4a3a9b7e 100644
--- a/Documentation/kernel-hacking/locking.rst
+++ b/Documentation/kernel-hacking/locking.rst
@@ -1006,8 +1006,7 @@ Another common problem is deleting timers which restart themselves (by
 calling add_timer() at the end of their timer function).
 Because this is a fairly common case which is prone to races, you should
 use del_timer_sync() (``include/linux/timer.h``) to
-handle this case. It returns the number of times the timer had to be
-deleted before we finally stopped it from adding itself back in.
+handle this case.
 
 Locking Speed
 =============
diff --git a/Documentation/translations/it_IT/kernel-hacking/locking.rst b/Documentation/translations/it_IT/kernel-hacking/locking.rst
index 51af37f2d621..eddfba806e13 100644
--- a/Documentation/translations/it_IT/kernel-hacking/locking.rst
+++ b/Documentation/translations/it_IT/kernel-hacking/locking.rst
@@ -1027,9 +1027,7 @@ Un altro problema è l'eliminazione dei temporizzatori che si riavviano
 da soli (chiamando add_timer() alla fine della loro esecuzione).
 Dato che questo è un problema abbastanza comune con una propensione
 alle corse critiche, dovreste usare del_timer_sync()
-(``include/linux/timer.h``) per gestire questo caso. Questa ritorna il
-numero di volte che il temporizzatore è stato interrotto prima che
-fosse in grado di fermarlo senza che si riavviasse.
+(``include/linux/timer.h``) per gestire questo caso.
 
 Velocità della sincronizzazione
 ===============================
--

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From: Jeongjun Park <[email-masked]>
To: [email-masked]
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Subject: [PATCH 6.1.y 02/12] ARM: spear: Do not use timer namespace for timer_shutdown() function
Date: Sat, 11 Oct 2025 00:02:42 +0900
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From: "Steven Rostedt (Google)" <[email-masked]>

[ Upstream commit 80b55772d41d8afec68dbc4ff0368a9fe5d1f390 ]

A new "shutdown" timer state is being added to the generic timer code. One
of the functions to change the timer into the state is called
"timer_shutdown()". This means that there can not be other functions called
"timer_shutdown()" as the timer code owns the "timer_*" name space.

Rename timer_shutdown() to spear_timer_shutdown() to avoid this conflict.

Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Thomas Gleixner <[email-masked]>
Tested-by: Guenter Roeck <[email-masked]>
Reviewed-by: Guenter Roeck <[email-masked]>
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Anna-Maria Behnsen <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Acked-by: Viresh Kumar <[email-masked]>
Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/all/[email-masked]/
Link: https://lore.kernel.org/r/[email-masked]
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 arch/arm/mach-spear/time.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c
index e979e2197f8e..5371c824786d 100644
--- a/arch/arm/mach-spear/time.c
+++ b/arch/arm/mach-spear/time.c
@@ -90,7 +90,7 @@ static void __init spear_clocksource_init(void)
 		200, 16, clocksource_mmio_readw_up);
 }
 
-static inline void timer_shutdown(struct clock_event_device *evt)
+static inline void spear_timer_shutdown(struct clock_event_device *evt)
 {
 	u16 val = readw(gpt_base + CR(CLKEVT));
 
@@ -101,7 +101,7 @@ static inline void timer_shutdown(struct clock_event_device *evt)
 
 static int spear_shutdown(struct clock_event_device *evt)
 {
-	timer_shutdown(evt);
+	spear_timer_shutdown(evt);
 
 	return 0;
 }
@@ -111,7 +111,7 @@ static int spear_set_oneshot(struct clock_event_device *evt)
 	u16 val;
 
 	/* stop the timer */
-	timer_shutdown(evt);
+	spear_timer_shutdown(evt);
 
 	val = readw(gpt_base + CR(CLKEVT));
 	val |= CTRL_ONE_SHOT;
@@ -126,7 +126,7 @@ static int spear_set_periodic(struct clock_event_device *evt)
 	u16 val;
 
 	/* stop the timer */
-	timer_shutdown(evt);
+	spear_timer_shutdown(evt);
 
 	period = clk_get_rate(gpt_clk) / HZ;
 	period >>= CTRL_PRESCALER16;
--

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Subject: [PATCH 6.1.y 00/12] timers: Provide timer_shutdown[_sync]()
Date: Sat, 11 Oct 2025 00:02:40 +0900
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The "timers: Provide timer_shutdown[_sync]()" patch series implemented a
useful feature that addresses various bugs caused by attempts to rearm
shutdown timers.

https://lore.kernel.org/all/[email-masked]/

However, this patch series was not fully backported to versions prior to
6.2, requiring separate patches for older kernels if these bugs were
encountered.

The biggest problem with this is that even if these bugs were discovered
and patched in the upstream kernel, if the maintainer or author didn't
create a separate backport patch for versions prior to 6.2, the bugs would
remain untouched in older kernels.

Therefore, to reduce the hassle of having to write a separate patch, we
should backport the remaining unbackported commits from the
"timers: Provide timer_shutdown[_sync]()" patch series to versions prior
to 6.2.

---
 Documentation/RCU/Design/Requirements/Requirements.rst      |   2 +-
 Documentation/core-api/local_ops.rst                        |   2 +-
 Documentation/kernel-hacking/locking.rst                    |  17 ++++---
 Documentation/timers/hrtimers.rst                           |   2 +-
 Documentation/translations/it_IT/kernel-hacking/locking.rst |  14 +++--
 Documentation/translations/zh_CN/core-api/local_ops.rst     |   2 +-
 arch/arm/mach-spear/time.c                                  |   8 +--
 drivers/bluetooth/hci_qca.c                                 |  10 +++-
 drivers/clocksource/arm_arch_timer.c                        |  12 ++---
 drivers/clocksource/timer-sp804.c                           |   6 +--
 include/linux/timer.h                                       |   2 +
 kernel/time/timer.c                                         | 311 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------
 12 files changed, 299 insertions(+), 89 deletions(-)

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From: Jeongjun Park <[email-masked]>
To: Namjae Jeon <[email-masked]>,
	Sungjong Seo <[email-masked]>
Cc: Yuezhang Mo <[email-masked]>,
	Al Viro <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Jeongjun Park <[email-masked]>
Subject: [PATCH v2] exfat: fix out-of-bounds in exfat_nls_to_ucs2()
Date: Fri, 10 Oct 2025 14:03:29 +0900
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In exfat_nls_to_ucs2(), if there is no NLS loss and the char-to-ucs2
conversion is successfully completed, the variable "i" will have the same
value as len. 

However, exfat_nls_to_ucs2() checks p_cstring[i] to determine whether nls
is lost immediately after the while loop ends, so if len is FSLABEL_MAX,
"i" will also be FSLABEL_MAX immediately after the while loop ends,
resulting in an out-of-bounds read of 1 byte from the p_cstring stack
memory.

Therefore, to prevent this and properly determine whether nls has been
lost, it should be modified to check if "i" and len are equal, rather than
dereferencing p_cstring.

Cc: <[email-masked]>
Reported-by: [email-masked]
Closes: https://syzkaller.appspot.com/bug?extid=98cc76a76de46b3714d4
Fixes: 370e812b3ec1 ("exfat: add nls operations")
Signed-off-by: Jeongjun Park <[email-masked]>
---
 fs/exfat/nls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
index 8243d94ceaf4..de06abe426d7 100644
--- a/fs/exfat/nls.c
+++ b/fs/exfat/nls.c
@@ -616,7 +616,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
 		unilen++;
 	}
 
-	if (p_cstring[i] != '\0')
+	if (i != len)
 		lossy |= NLS_NAME_OVERLEN;
 
 	*uniname = '\0';
--

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Date: Fri, 10 Oct 2025 00:18:03 -0500
From: Lucas De Marchi <[email-masked]>
To: Ilpo =?utf-8?B?SsOkcnZpbmVu?= <[email-masked]>
CC: <[email-masked]>, <[email-masked]>,
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Subject: Re: [PATCH 2/2] drm/xe: Move rebar to be done earlier
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On Mon, Sep 29, 2025 at 04:56:03PM +0300, Ilpo J�rvinen wrote:
>On Mon, 29 Sep 2025, Lucas De Marchi wrote:
>
>> Hi,
>>
>> On Thu, Sep 18, 2025 at 01:58:57PM -0700, Lucas De Marchi wrote:
>> > There may be cases in which the BAR0 also needs to move to accommodate
>> > the bigger BAR2. However if it's not released, the BAR2 resize fails.
>> > During the vram probe it can't be released as it's already in use by
>> > xe_mmio for early register access.
>> >
>> > Add a new function in xe_vram and let xe_pci call it directly before
>> > even early device probe. This allows the BAR2 to resize in cases BAR0
>> > also needs to move:
>> >
>> > 	[] xe 0000:03:00.0: vgaarb: deactivate vga console
>> > 	[] xe 0000:03:00.0: [drm] Attempting to resize bar from 8192MiB ->
>> > 16384MiB
>> > 	[] xe 0000:03:00.0: BAR 0 [mem 0x83000000-0x83ffffff 64bit]: releasing
>> > 	[] xe 0000:03:00.0: BAR 2 [mem 0x4000000000-0x41ffffffff 64bit pref]:
>> > releasing
>> > 	[] pcieport 0000:02:01.0: bridge window [mem 0x4000000000-0x41ffffffff
>> > 64bit pref]: releasing
>> > 	[] pcieport 0000:01:00.0: bridge window [mem 0x4000000000-0x41ffffffff
>> > 64bit pref]: releasing
>> > 	[] pcieport 0000:01:00.0: bridge window [mem 0x4000000000-0x43ffffffff
>> > 64bit pref]: assigned
>> > 	[] pcieport 0000:02:01.0: bridge window [mem 0x4000000000-0x43ffffffff
>> > 64bit pref]: assigned
>> > 	[] xe 0000:03:00.0: BAR 2 [mem 0x4000000000-0x43ffffffff 64bit pref]:
>> > assigned
>> > 	[] xe 0000:03:00.0: BAR 0 [mem 0x83000000-0x83ffffff 64bit]: assigned
>> > 	[] pcieport 0000:00:01.0: PCI bridge to [bus 01-04]
>> > 	[] pcieport 0000:00:01.0:   bridge window [mem 0x83000000-0x840fffff]
>> > 	[] pcieport 0000:00:01.0:   bridge window [mem
>> > 0x4000000000-0x44007fffff 64bit pref]
>> > 	[] pcieport 0000:01:00.0: PCI bridge to [bus 02-04]
>> > 	[] pcieport 0000:01:00.0:   bridge window [mem 0x83000000-0x840fffff]
>> > 	[] pcieport 0000:01:00.0:   bridge window [mem
>> > 0x4000000000-0x43ffffffff 64bit pref]
>> > 	[] pcieport 0000:02:01.0: PCI bridge to [bus 03]
>> > 	[] pcieport 0000:02:01.0:   bridge window [mem 0x83000000-0x83ffffff]
>> > 	[] pcieport 0000:02:01.0:   bridge window [mem
>> > 0x4000000000-0x43ffffffff 64bit pref]
>> > 	[] xe 0000:03:00.0: [drm] BAR2 resized to 16384M
>> > 	[] xe 0000:03:00.0: [drm:xe_pci_probe [xe]] BATTLEMAGE  e221:0000
>> > dgfx:1 gfx:Xe2_HPG (20.02) ...
>> >
>> > As shown above, it happens even before we try to read any register for
>> > platform identification.
>> >
>> > All the rebar logic is more pci-specific than xe-specific and can be
>> > done very early in the probe sequence. In future it would be good to
>> > move it out of xe_vram.c, but this refactor is left for later.
>>
>> Ilpo, can you take a look on this patch? It fixed the issue that I had
>> with BMG. It needs the first patch for the full fix, but the fixes are
>> more or less orthogonal.
>
>FWIW, it looks okay to me from PCI perspective,
>
>Reviewed-by: Ilpo J�rvinen <[email-masked]>

I'm pushing this to drm-xe-next. The first one may go through pci or drm
tree when it's reviewed.

Merged to drm-xe-next, thanks!

[2/2] drm/xe: Move rebar to be done earlier
       commit: 45e33f220fd625492c11e15733d8e9b4f9db82a4

thanks
Lucas De Marchi

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From: Jason Xing <[email-masked]>
Date: Fri, 10 Oct 2025 14:51:00 +0800
Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
To: Maciej Fijalkowski <[email-masked]>
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	Magnus Karlsson <[email-masked]>, Stanislav Fomichev <[email-masked]>, 
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On Thu, Oct 9, 2025 at 10:28=E2=80=AFPM Maciej Fijalkowski
<[email-masked]> wrote:
>
> On Wed, Oct 08, 2025 at 06:56:59PM +0200, Alexander Lobakin wrote:
> > Turned out certain clearly invalid values passed in &xdp_desc from
> > userspace can pass xp_{,un}aligned_validate_desc() and then lead
> > to UBs or just invalid frames to be queued for xmit.
> >
> > desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
> > can cause positive integer overflow and wraparound, the same way low
> > enough desc->addr with a non-zero pool->tx_metadata_len can cause
> > negative integer overflow. Both scenarios can then pass the
> > validation successfully.
>
> Hmm, when underflow happens the addr would be enormous, passing
> existing validation would really be rare. However let us fix it while at
> it.
>
> > This doesn't happen with valid XSk applications, but can be used
> > to perform attacks.
> >
> > Always promote desc->len to ``u64`` first to exclude positive
> > overflows of it. Use explicit check_{add,sub}_overflow() when
> > validating desc->addr (which is ``u64`` already).
> >
> > bloat-o-meter reports a little growth of the code size:
> >
> > add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
> > Function                                     old     new   delta
> > xskq_cons_peek_desc                          299     330     +31
> > xsk_tx_peek_release_desc_batch               973    1002     +29
> > xsk_generic_xmit                            3148    3132     -16
> >
> > but hopefully this doesn't hurt the performance much.
>
> Let us be fully transparent and link the previous discussion here?
>
> I was commenting that breaking up single statement to multiple branches
> might affect subtly performance as this code is executed per each
> descriptor. Jason tested copy+aligned mode, let us see if zc+unaligned
> mode is affected.
>
> <rant>
> I am also thinking about test side, but xsk tx metadata came with a
> separate test (xdp_hw_metadata), which was rather about testing positive
> cases. That is probably a separate discussion, but metadata negative
> tests should appear somewhere, I suppose xskxceiver would be a good fit,
> but then, should we merge the existing logic from xdp_hw_metadata?
> </rant>
>
> >
> > Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
> > Cc: [email-masked] # 6.8+
> > Signed-off-by: Alexander Lobakin <[email-masked]>
> > ---
> >  net/xdp/xsk_queue.h | 45 +++++++++++++++++++++++++++++++++++----------
> >  1 file changed, 35 insertions(+), 10 deletions(-)
> >
> > diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
> > index f16f390370dc..1eb8d9f8b104 100644
> > --- a/net/xdp/xsk_queue.h
> > +++ b/net/xdp/xsk_queue.h
> > @@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 opti=
ons)
> >  static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool=
,
> >                                           struct xdp_desc *desc)
> >  {
> > -     u64 addr =3D desc->addr - pool->tx_metadata_len;
> > -     u64 len =3D desc->len + pool->tx_metadata_len;
> > -     u64 offset =3D addr & (pool->chunk_size - 1);
> > +     u64 len =3D desc->len;
> > +     u64 addr, offset;
> >
> > -     if (!desc->len)
> > +     if (!len)
>
> This is yet another thing being fixed here as for non-zero tx_metadata_le=
n
> we were allowing 0 length descriptors... :< overall feels like we relied
> too much on contract with userspace WRT descriptor layout.
>
> If zc perf is fine, then:

Testing on IXGBE that can reach 10Gb/sec line rate, I didn't see any
impact either. This time I used -u to cover the unaligned case.

What I did was just like below:
# sysctl -w vm.nr_hugepages=3D1024
# taskset -c 1 ./xdpsock -i eth1 -t -z -u -s 64

Thanks,
Jason

> Reviewed-by: Maciej Fijalkowski <[email-masked]>
>
> >               return false;
> >
> > -     if (offset + len > pool->chunk_size)
> > +     /* Can overflow if desc->addr < pool->tx_metadata_len */
> > +     if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
> > +             return false;
> > +
> > +     offset =3D addr & (pool->chunk_size - 1);
> > +
> > +     /*
> > +      * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
> > +      * (pool->chunk_size is ``u32``), @len is guaranteed
> > +      * to be <=3D ``U32_MAX``.
> > +      */
> > +     if (offset + len + pool->tx_metadata_len > pool->chunk_size)
> >               return false;
> >
> >       if (addr >=3D pool->addrs_cnt)
> > @@ -158,27 +168,42 @@ static inline bool xp_aligned_validate_desc(struc=
t xsk_buff_pool *pool,
> >
> >       if (xp_unused_options_set(desc->options))
> >               return false;
> > +
> >       return true;
> >  }
> >
> >  static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *po=
ol,
> >                                             struct xdp_desc *desc)
> >  {
> > -     u64 addr =3D xp_unaligned_add_offset_to_addr(desc->addr) - pool->=
tx_metadata_len;
> > -     u64 len =3D desc->len + pool->tx_metadata_len;
> > +     u64 len =3D desc->len;
> > +     u64 addr, end;
> >
> > -     if (!desc->len)
> > +     if (!len)
> >               return false;
> >
> > +     /* Can't overflow: @len is guaranteed to be <=3D ``U32_MAX`` */
> > +     len +=3D pool->tx_metadata_len;
> >       if (len > pool->chunk_size)
> >               return false;
> >
> > -     if (addr >=3D pool->addrs_cnt || addr + len > pool->addrs_cnt ||
> > -         xp_desc_crosses_non_contig_pg(pool, addr, len))
> > +     /* Can overflow if desc->addr is close to 0 */
> > +     if (check_sub_overflow(xp_unaligned_add_offset_to_addr(desc->addr=
),
> > +                            pool->tx_metadata_len, &addr))
> > +             return false;
> > +
> > +     if (addr >=3D pool->addrs_cnt)
> > +             return false;
> > +
> > +     /* Can overflow if pool->addrs_cnt is high enough */
> > +     if (check_add_overflow(addr, len, &end) || end > pool->addrs_cnt)
> > +             return false;
> > +
> > +     if (xp_desc_crosses_non_contig_pg(pool, addr, len))
> >               return false;
> >
> >       if (xp_unused_options_set(desc->options))
> >               return false;
> > +
> >       return true;
> >  }
> >
> > --
> > 2.51.0
> >
>

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From: Jacob Keller <[email-masked]>
Date: Thu, 09 Oct 2025 17:03:49 -0700
Subject: [PATCH net v3 4/6] ixgbevf: fix mailbox API compatibility by
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To: Przemek Kitszel <[email-masked]>, 
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 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>, 
 Jedrzej Jagielski <[email-masked]>
Cc: Konstantin Ilichev <[email-masked]>, 
 Milena Olech <[email-masked]>, [email-masked], 
 [email-masked], Jacob Keller <[email-masked]>, 
 Aleksandr Loktionov <[email-masked]>, [email-masked], 
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From: Jedrzej Jagielski <[email-masked]>

There was backward compatibility in the terms of mailbox API. Various
drivers from various OSes supporting 10G adapters from Intel portfolio
could easily negotiate mailbox API.

This convention has been broken since introducing API 1.4.
Commit 0062e7cc955e ("ixgbevf: add VF IPsec offload code") added support
for IPSec which is specific only for the kernel ixgbe driver. None of the
rest of the Intel 10G PF/VF drivers supports it. And actually lack of
support was not included in the IPSec implementation - there were no such
code paths. No possibility to negotiate support for the feature was
introduced along with introduction of the feature itself.

Commit 339f28964147 ("ixgbevf: Add support for new mailbox communication
between PF and VF") increasing API version to 1.5 did the same - it
introduced code supported specifically by the PF ESX driver. It altered API
version for the VF driver in the same time not touching the version
defined for the PF ixgbe driver. It led to additional discrepancies,
as the code provided within API 1.6 cannot be supported for Linux ixgbe
driver as it causes crashes.

The issue was noticed some time ago and mitigated by Jake within the commit
d0725312adf5 ("ixgbevf: stop attempting IPSEC offload on Mailbox API 1.5").
As a result we have regression for IPsec support and after increasing API
to version 1.6 ixgbevf driver stopped to support ESX MBX.

To fix this mess add new mailbox op asking PF driver about supported
features. Basing on a response determine whether to set support for IPSec
and ESX-specific enhanced mailbox.

New mailbox op, for compatibility purposes, must be added within new API
revision, as API version of OOT PF & VF drivers is already increased to
1.6 and doesn't incorporate features negotiate op.

Features negotiation mechanism gives possibility to be extended with new
features when needed in the future.

Reported-by: Jacob Keller <[email-masked]>
Closes: https://lore.kernel.org/intel-wired-lan/[email-masked]/
Fixes: 0062e7cc955e ("ixgbevf: add VF IPsec offload code")
Fixes: 339f28964147 ("ixgbevf: Add support for new mailbox communication between PF and VF")
Reviewed-by: Jacob Keller <[email-masked]>
Reviewed-by: Przemek Kitszel <[email-masked]>
Reviewed-by: Aleksandr Loktionov <[email-masked]>
Cc: [email-masked]
Signed-off-by: Jedrzej Jagielski <[email-masked]>
Tested-by: Rafal Romanowski <[email-masked]>
Signed-off-by: Jacob Keller <[email-masked]>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf.h      |  7 ++++
 drivers/net/ethernet/intel/ixgbevf/mbx.h          |  4 ++
 drivers/net/ethernet/intel/ixgbevf/vf.h           |  1 +
 drivers/net/ethernet/intel/ixgbevf/ipsec.c        | 10 +++++
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 32 +++++++++++++++-
 drivers/net/ethernet/intel/ixgbevf/vf.c           | 45 ++++++++++++++++++++++-
 6 files changed, 96 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
index 3a379e6a3a2a..039187607e98 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
@@ -363,6 +363,13 @@ struct ixgbevf_adapter {
 	struct ixgbe_hw hw;
 	u16 msg_enable;
 
+	u32 pf_features;
+#define IXGBEVF_PF_SUP_IPSEC		BIT(0)
+#define IXGBEVF_PF_SUP_ESX_MBX		BIT(1)
+
+#define IXGBEVF_SUPPORTED_FEATURES	(IXGBEVF_PF_SUP_IPSEC | \
+					IXGBEVF_PF_SUP_ESX_MBX)
+
 	struct ixgbevf_hw_stats stats;
 
 	unsigned long state;
diff --git a/drivers/net/ethernet/intel/ixgbevf/mbx.h b/drivers/net/ethernet/intel/ixgbevf/mbx.h
index c1494fd1f67b..a8ed23ee66aa 100644
--- a/drivers/net/ethernet/intel/ixgbevf/mbx.h
+++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h
@@ -67,6 +67,7 @@ enum ixgbe_pfvf_api_rev {
 	ixgbe_mbox_api_14,	/* API version 1.4, linux/freebsd VF driver */
 	ixgbe_mbox_api_15,	/* API version 1.5, linux/freebsd VF driver */
 	ixgbe_mbox_api_16,      /* API version 1.6, linux/freebsd VF driver */
+	ixgbe_mbox_api_17,	/* API version 1.7, linux/freebsd VF driver */
 	/* This value should always be last */
 	ixgbe_mbox_api_unknown,	/* indicates that API version is not known */
 };
@@ -106,6 +107,9 @@ enum ixgbe_pfvf_api_rev {
 /* mailbox API, version 1.6 VF requests */
 #define IXGBE_VF_GET_PF_LINK_STATE	0x11 /* request PF to send link info */
 
+/* mailbox API, version 1.7 VF requests */
+#define IXGBE_VF_FEATURES_NEGOTIATE	0x12 /* get features supported by PF*/
+
 /* length of permanent address message returned from PF */
 #define IXGBE_VF_PERMADDR_MSG_LEN	4
 /* word in permanent address message with the current multicast type */
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h
index 2d791bc26ae4..4f19b8900c29 100644
--- a/drivers/net/ethernet/intel/ixgbevf/vf.h
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.h
@@ -26,6 +26,7 @@ struct ixgbe_mac_operations {
 	s32 (*stop_adapter)(struct ixgbe_hw *);
 	s32 (*get_bus_info)(struct ixgbe_hw *);
 	s32 (*negotiate_api_version)(struct ixgbe_hw *hw, int api);
+	int (*negotiate_features)(struct ixgbe_hw *hw, u32 *pf_features);
 
 	/* Link */
 	s32 (*setup_link)(struct ixgbe_hw *, ixgbe_link_speed, bool, bool);
diff --git a/drivers/net/ethernet/intel/ixgbevf/ipsec.c b/drivers/net/ethernet/intel/ixgbevf/ipsec.c
index 65580b9cb06f..fce35924ff8b 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ipsec.c
@@ -273,6 +273,9 @@ static int ixgbevf_ipsec_add_sa(struct net_device *dev,
 	adapter = netdev_priv(dev);
 	ipsec = adapter->ipsec;
 
+	if (!(adapter->pf_features & IXGBEVF_PF_SUP_IPSEC))
+		return -EOPNOTSUPP;
+
 	if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for IPsec offload");
 		return -EINVAL;
@@ -405,6 +408,9 @@ static void ixgbevf_ipsec_del_sa(struct net_device *dev,
 	adapter = netdev_priv(dev);
 	ipsec = adapter->ipsec;
 
+	if (!(adapter->pf_features & IXGBEVF_PF_SUP_IPSEC))
+		return;
+
 	if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) {
 		sa_idx = xs->xso.offload_handle - IXGBE_IPSEC_BASE_RX_INDEX;
 
@@ -612,6 +618,10 @@ void ixgbevf_init_ipsec_offload(struct ixgbevf_adapter *adapter)
 	size_t size;
 
 	switch (adapter->hw.api_version) {
+	case ixgbe_mbox_api_17:
+		if (!(adapter->pf_features & IXGBEVF_PF_SUP_IPSEC))
+			return;
+		break;
 	case ixgbe_mbox_api_14:
 		break;
 	default:
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 92671638b428..d5ce20f47def 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -2271,10 +2271,35 @@ static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
 	adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
 }
 
+/**
+ * ixgbevf_set_features - Set features supported by PF
+ * @adapter: pointer to the adapter struct
+ *
+ * Negotiate with PF supported features and then set pf_features accordingly.
+ */
+static void ixgbevf_set_features(struct ixgbevf_adapter *adapter)
+{
+	u32 *pf_features = &adapter->pf_features;
+	struct ixgbe_hw *hw = &adapter->hw;
+	int err;
+
+	err = hw->mac.ops.negotiate_features(hw, pf_features);
+	if (err && err != -EOPNOTSUPP)
+		netdev_dbg(adapter->netdev,
+			   "PF feature negotiation failed.\n");
+
+	/* Address also pre API 1.7 cases */
+	if (hw->api_version == ixgbe_mbox_api_14)
+		*pf_features |= IXGBEVF_PF_SUP_IPSEC;
+	else if (hw->api_version == ixgbe_mbox_api_15)
+		*pf_features |= IXGBEVF_PF_SUP_ESX_MBX;
+}
+
 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
 	static const int api[] = {
+		ixgbe_mbox_api_17,
 		ixgbe_mbox_api_16,
 		ixgbe_mbox_api_15,
 		ixgbe_mbox_api_14,
@@ -2295,8 +2320,9 @@ static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
 		idx++;
 	}
 
-	/* Following is not supported by API 1.6, it is specific for 1.5 */
-	if (hw->api_version == ixgbe_mbox_api_15) {
+	ixgbevf_set_features(adapter);
+
+	if (adapter->pf_features & IXGBEVF_PF_SUP_ESX_MBX) {
 		hw->mbx.ops.init_params(hw);
 		memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
 		       sizeof(struct ixgbe_mbx_operations));
@@ -2654,6 +2680,7 @@ static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
 		case ixgbe_mbox_api_14:
 		case ixgbe_mbox_api_15:
 		case ixgbe_mbox_api_16:
+		case ixgbe_mbox_api_17:
 			if (adapter->xdp_prog &&
 			    hw->mac.max_tx_queues == rss)
 				rss = rss > 3 ? 2 : 1;
@@ -4649,6 +4676,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_16:
+	case ixgbe_mbox_api_17:
 		netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
 				  (ETH_HLEN + ETH_FCS_LEN);
 		break;
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c
index f05246fb5a74..74d320879513 100644
--- a/drivers/net/ethernet/intel/ixgbevf/vf.c
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.c
@@ -313,6 +313,7 @@ int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
 	 * is not supported for this device type.
 	 */
 	switch (hw->api_version) {
+	case ixgbe_mbox_api_17:
 	case ixgbe_mbox_api_16:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_14:
@@ -383,6 +384,7 @@ int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
 	 * or if the operation is not supported for this device type.
 	 */
 	switch (hw->api_version) {
+	case ixgbe_mbox_api_17:
 	case ixgbe_mbox_api_16:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_14:
@@ -555,6 +557,7 @@ static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_16:
+	case ixgbe_mbox_api_17:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -646,6 +649,7 @@ static int ixgbevf_get_pf_link_state(struct ixgbe_hw *hw, ixgbe_link_speed *spee
 
 	switch (hw->api_version) {
 	case ixgbe_mbox_api_16:
+	case ixgbe_mbox_api_17:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -669,6 +673,42 @@ static int ixgbevf_get_pf_link_state(struct ixgbe_hw *hw, ixgbe_link_speed *spee
 	return err;
 }
 
+/**
+ * ixgbevf_negotiate_features_vf - negotiate supported features with PF driver
+ * @hw: pointer to the HW structure
+ * @pf_features: bitmask of features supported by PF
+ *
+ * Return: IXGBE_ERR_MBX in the  case of mailbox error,
+ * -EOPNOTSUPP if the op is not supported or 0 on success.
+ */
+static int ixgbevf_negotiate_features_vf(struct ixgbe_hw *hw, u32 *pf_features)
+{
+	u32 msgbuf[2] = {};
+	int err;
+
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_17:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	msgbuf[0] = IXGBE_VF_FEATURES_NEGOTIATE;
+	msgbuf[1] = IXGBEVF_SUPPORTED_FEATURES;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					 ARRAY_SIZE(msgbuf));
+
+	if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
+		err = IXGBE_ERR_MBX;
+		*pf_features = 0x0;
+	} else {
+		*pf_features = msgbuf[1];
+	}
+
+	return err;
+}
+
 /**
  *  ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
  *  @hw: pointer to the HW structure
@@ -799,6 +839,7 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 				     bool *link_up,
 				     bool autoneg_wait_to_complete)
 {
+	struct ixgbevf_adapter *adapter = hw->back;
 	struct ixgbe_mbx_info *mbx = &hw->mbx;
 	struct ixgbe_mac_info *mac = &hw->mac;
 	s32 ret_val = 0;
@@ -825,7 +866,7 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 	 * until we are called again and don't report an error
 	 */
 	if (mbx->ops.read(hw, &in_msg, 1)) {
-		if (hw->api_version >= ixgbe_mbox_api_15)
+		if (adapter->pf_features & IXGBEVF_PF_SUP_ESX_MBX)
 			mac->get_link_status = false;
 		goto out;
 	}
@@ -1026,6 +1067,7 @@ int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_16:
+	case ixgbe_mbox_api_17:
 		break;
 	default:
 		return 0;
@@ -1080,6 +1122,7 @@ static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
 	.setup_link		= ixgbevf_setup_mac_link_vf,
 	.check_link		= ixgbevf_check_mac_link_vf,
 	.negotiate_api_version	= ixgbevf_negotiate_api_version_vf,
+	.negotiate_features	= ixgbevf_negotiate_features_vf,
 	.set_rar		= ixgbevf_set_rar_vf,
 	.update_mc_addr_list	= ixgbevf_update_mc_addr_list_vf,
 	.update_xcast_mode	= ixgbevf_update_xcast_mode,

-- 
2.51.0.rc1.197.g6d975e95c9d7

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Date: Fri, 10 Oct 2025 02:35:48 +0200
Subject: Re: [PATCH v2 04/10] pmdomain: samsung: plug potential memleak during
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To: =?UTF-8?Q?Andr=C3=A9_Draszik?= <[email-masked]>,
 Alim Akhtar <[email-masked]>, Rob Herring <[email-masked]>,
 Conor Dooley <[email-masked]>, Krzysztof Kozlowski
 <[email-masked]>, Ulf Hansson <[email-masked]>,
 Marek Szyprowski <[email-masked]>
Cc: Peter Griffin <[email-masked]>,
 Tudor Ambarus <[email-masked]>,
 Will McVicker <[email-masked]>, [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked]
From: Krzysztof Kozlowski <[email-masked]>
Autocrypt: addr=[email-masked]; keydata=
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On 09/10/2025 00:25, André Draszik wrote:
> of_genpd_add_provider_simple() could fail, in which case this code
> leaks the domain name, pd->pd.name.
> 
> Use devm_kstrdup_const() to plug this leak. As a side-effect, we can
> simplify existing error handling.
> 
> Fixes: c09a3e6c97f0 ("soc: samsung: pm_domains: Convert to regular platform driver")
> Cc: [email-masked]
> Reviewed-by: Peter Griffin <[email-masked]>
> Signed-off-by: André Draszik <[email-masked]>

Reviewed-by: Krzysztof Kozlowski <[email-masked]>

Best regards,
Krzysztof

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Date: Thu, 9 Oct 2025 20:00:33 -0700
From: Paul Aurich <[email-masked]>
To: Shivani Agarwal <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked],
	Steve French <[email-masked]>,
	Cliff Liu <[email-masked]>,
	He Zhe <[email-masked]>
Subject: Re: [PATCH v6.1] smb: prevent use-after-free due to open_cached_dir
 error paths
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Thanks for proposing this!  I think this backport has the problem I was 
concerned with when Cliff Liu proposed a backport in March [1].

The handling of the 'has_lease' field in this patch depends on work done by 
two other patches, and those should be backported before this one:

- 5c86919455c1 ("smb: client: fix use-after-free in 
    smb2_query_info_compound()")
- 7afb86733685 ("smb: Don't leak cfid when reconnect races with 
    open_cached_dir")

I have (somewhere...) a backport of all three of these patches three patches 
to linux-6.1.y, but it was a while ago and I never found the time to _test_ 
the backports.

[1] https://lore.kernel.org/linux-cifs/[email-masked]/

On 2025-10-08 23:08:46 -0700, Shivani Agarwal wrote:
>From: Paul Aurich <[email-masked]>
>
>commit a9685b409a03b73d2980bbfa53eb47555802d0a9 upstream.
>
>If open_cached_dir() encounters an error parsing the lease from the
>server, the error handling may race with receiving a lease break,
>resulting in open_cached_dir() freeing the cfid while the queued work is
>pending.
>
>Update open_cached_dir() to drop refs rather than directly freeing the
>cfid.
>
>Have cached_dir_lease_break(), cfids_laundromat_worker(), and
>invalidate_all_cached_dirs() clear has_lease immediately while still
>holding cfids->cfid_list_lock, and then use this to also simplify the
>reference counting in cfids_laundromat_worker() and
>invalidate_all_cached_dirs().
>
>Fixes this KASAN splat (which manually injects an error and lease break
>in open_cached_dir()):
>
>==================================================================
>BUG: KASAN: slab-use-after-free in smb2_cached_lease_break+0x27/0xb0
>Read of size 8 at addr ffff88811cc24c10 by task kworker/3:1/65
>
>CPU: 3 UID: 0 PID: 65 Comm: kworker/3:1 Not tainted 6.12.0-rc6-g255cf264e6e5-dirty #87
>Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
>Workqueue: cifsiod smb2_cached_lease_break
>Call Trace:
> <TASK>
> dump_stack_lvl+0x77/0xb0
> print_report+0xce/0x660
> kasan_report+0xd3/0x110
> smb2_cached_lease_break+0x27/0xb0
> process_one_work+0x50a/0xc50
> worker_thread+0x2ba/0x530
> kthread+0x17c/0x1c0
> ret_from_fork+0x34/0x60
> ret_from_fork_asm+0x1a/0x30
> </TASK>
>
>Allocated by task 2464:
> kasan_save_stack+0x33/0x60
> kasan_save_track+0x14/0x30
> __kasan_kmalloc+0xaa/0xb0
> open_cached_dir+0xa7d/0x1fb0
> smb2_query_path_info+0x43c/0x6e0
> cifs_get_fattr+0x346/0xf10
> cifs_get_inode_info+0x157/0x210
> cifs_revalidate_dentry_attr+0x2d1/0x460
> cifs_getattr+0x173/0x470
> vfs_statx_path+0x10f/0x160
> vfs_statx+0xe9/0x150
> vfs_fstatat+0x5e/0xc0
> __do_sys_newfstatat+0x91/0xf0
> do_syscall_64+0x95/0x1a0
> entry_SYSCALL_64_after_hwframe+0x76/0x7e
>
>Freed by task 2464:
> kasan_save_stack+0x33/0x60
> kasan_save_track+0x14/0x30
> kasan_save_free_info+0x3b/0x60
> __kasan_slab_free+0x51/0x70
> kfree+0x174/0x520
> open_cached_dir+0x97f/0x1fb0
> smb2_query_path_info+0x43c/0x6e0
> cifs_get_fattr+0x346/0xf10
> cifs_get_inode_info+0x157/0x210
> cifs_revalidate_dentry_attr+0x2d1/0x460
> cifs_getattr+0x173/0x470
> vfs_statx_path+0x10f/0x160
> vfs_statx+0xe9/0x150
> vfs_fstatat+0x5e/0xc0
> __do_sys_newfstatat+0x91/0xf0
> do_syscall_64+0x95/0x1a0
> entry_SYSCALL_64_after_hwframe+0x76/0x7e
>
>Last potentially related work creation:
> kasan_save_stack+0x33/0x60
> __kasan_record_aux_stack+0xad/0xc0
> insert_work+0x32/0x100
> __queue_work+0x5c9/0x870
> queue_work_on+0x82/0x90
> open_cached_dir+0x1369/0x1fb0
> smb2_query_path_info+0x43c/0x6e0
> cifs_get_fattr+0x346/0xf10
> cifs_get_inode_info+0x157/0x210
> cifs_revalidate_dentry_attr+0x2d1/0x460
> cifs_getattr+0x173/0x470
> vfs_statx_path+0x10f/0x160
> vfs_statx+0xe9/0x150
> vfs_fstatat+0x5e/0xc0
> __do_sys_newfstatat+0x91/0xf0
> do_syscall_64+0x95/0x1a0
> entry_SYSCALL_64_after_hwframe+0x76/0x7e
>
>The buggy address belongs to the object at ffff88811cc24c00
> which belongs to the cache kmalloc-1k of size 1024
>The buggy address is located 16 bytes inside of
> freed 1024-byte region [ffff88811cc24c00, ffff88811cc25000)
>
>Cc: [email-masked]
>Signed-off-by: Paul Aurich <[email-masked]>
>Signed-off-by: Steve French <[email-masked]>
>[ Do not apply the change for cfids_laundromat_worker() since there is no
>  this function and related feature on 6.1.y. Update open_cached_dir()
>  according to method of upstream patch. ]
>Signed-off-by: Cliff Liu <[email-masked]>
>Signed-off-by: He Zhe <[email-masked]>
>[Shivani: Modified to apply on 6.1.y]
>Signed-off-by: Shivani Agarwal <[email-masked]>
>---
> fs/smb/client/cached_dir.c | 39 ++++++++++++++++----------------------
> 1 file changed, 16 insertions(+), 23 deletions(-)
>
>diff --git a/fs/smb/client/cached_dir.c b/fs/smb/client/cached_dir.c
>index 3d028b6a2..23a57a0c8 100644
>--- a/fs/smb/client/cached_dir.c
>+++ b/fs/smb/client/cached_dir.c
>@@ -320,17 +320,13 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
> 		/*
> 		 * We are guaranteed to have two references at this point.
> 		 * One for the caller and one for a potential lease.
>-		 * Release the Lease-ref so that the directory will be closed
>-		 * when the caller closes the cached handle.
>+		 * Release one here, and the second below.
> 		 */
> 		kref_put(&cfid->refcount, smb2_close_cached_fid);
> 	}
> 	if (rc) {
>-		if (cfid->is_open)
>-			SMB2_close(0, cfid->tcon, cfid->fid.persistent_fid,
>-				   cfid->fid.volatile_fid);
>-		free_cached_dir(cfid);
>-		cfid = NULL;
>+		cfid->has_lease = false;

cfid->has_lease needs to be cleared while holding cfids->cfid_list_lock.  (See 
my feedback to the stable backport in March)

>+		kref_put(&cfid->refcount, smb2_close_cached_fid);
> 	}
>
> 	if (rc == 0) {
>@@ -462,25 +458,24 @@ void invalidate_all_cached_dirs(struct cifs_tcon *tcon)
> 		cfids->num_entries--;
> 		cfid->is_open = false;
> 		cfid->on_list = false;
>-		/* To prevent race with smb2_cached_lease_break() */
>-		kref_get(&cfid->refcount);
>+		if (cfid->has_lease) {
>+			/*
>+			 * The lease was never cancelled from the server,
>+			 * so steal that reference.
>+			 */
>+			cfid->has_lease = false;
>+		} else
>+			kref_get(&cfid->refcount);
> 	}
> 	spin_unlock(&cfids->cfid_list_lock);
>
> 	list_for_each_entry_safe(cfid, q, &entry, entry) {
> 		list_del(&cfid->entry);
> 		cancel_work_sync(&cfid->lease_break);
>-		if (cfid->has_lease) {
>-			/*
>-			 * We lease was never cancelled from the server so we
>-			 * need to drop the reference.
>-			 */
>-			spin_lock(&cfids->cfid_list_lock);
>-			cfid->has_lease = false;
>-			spin_unlock(&cfids->cfid_list_lock);
>-			kref_put(&cfid->refcount, smb2_close_cached_fid);
>-		}
>-		/* Drop the extra reference opened above*/
>+		/*
>+		 * Drop the ref-count from above, either the lease-ref (if there
>+		 * was one) or the extra one acquired.
>+		 */
> 		kref_put(&cfid->refcount, smb2_close_cached_fid);
> 	}
> }
>@@ -491,9 +486,6 @@ smb2_cached_lease_break(struct work_struct *work)
> 	struct cached_fid *cfid = container_of(work,
> 				struct cached_fid, lease_break);
>
>-	spin_lock(&cfid->cfids->cfid_list_lock);
>-	cfid->has_lease = false;
>-	spin_unlock(&cfid->cfids->cfid_list_lock);
> 	kref_put(&cfid->refcount, smb2_close_cached_fid);
> }
>
>@@ -511,6 +503,7 @@ int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16])
> 		    !memcmp(lease_key,
> 			    cfid->fid.lease_key,
> 			    SMB2_LEASE_KEY_SIZE)) {
>+			cfid->has_lease = false;
> 			cfid->time = 0;
> 			/*
> 			 * We found a lease remove it from the list
>-- 
>2.40.4
>

~Paul

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From: Kairui Song <[email-masked]>
Date: Thu, 9 Oct 2025 23:32:31 +0800
Subject: Re: [PATCH 1/4] mm, swap: do not perform synchronous discard during allocation
To: Chris Li <[email-masked]>
Cc: [email-masked], Andrew Morton <[email-masked]>, 
	Kemeng Shi <[email-masked]>, Nhat Pham <[email-masked]>, 
	Baoquan He <[email-masked]>, Barry Song <[email-masked]>, 
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	[email-masked], [email-masked]
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On Thu, Oct 9, 2025 at 5:10=E2=80=AFAM Chris Li <[email-masked]> wrote:
>
> Hi Kairui,
>
> First of all, your title is a bit misleading:
> "do not perform synchronous discard during allocation"
>
> You still do the synchronous discard, just limited to order 0 failing.
>
> Also your commit did not describe the behavior change of this patch.
> The behavior change is that, it now prefers to allocate from the
> fragment list before waiting for the discard. Which I feel is not
> justified.
>
> After reading your patch, I feel that you still do the synchronous
> discard, just now you do it with less lock held.
> I suggest you just fix the lock held issue without changing the
> discard ordering behavior.
>
> On Mon, Oct 6, 2025 at 1:03=E2=80=AFPM Kairui Song <[email-masked]> wro=
te:
> >
> > From: Kairui Song <[email-masked]>
> >
> > Since commit 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation
> > fast path"), swap allocation is protected by a local lock, which means
> > we can't do any sleeping calls during allocation.
> >
> > However, the discard routine is not taken well care of. When the swap
> > allocator failed to find any usable cluster, it would look at the
> > pending discard cluster and try to issue some blocking discards. It may
> > not necessarily sleep, but the cond_resched at the bio layer indicates
> > this is wrong when combined with a local lock. And the bio GFP flag use=
d
> > for discard bio is also wrong (not atomic).
>
> If lock is the issue, let's fix the lock issue.
>
> > It's arguable whether this synchronous discard is helpful at all. In
> > most cases, the async discard is good enough. And the swap allocator is
> > doing very differently at organizing the clusters since the recent
> > change, so it is very rare to see discard clusters piling up.
>
> Very rare does not mean this never happens. If you have a cluster on
> the discarding queue, I think it is better to wait for the discard to
> complete before using the fragmented list, to reduce the
> fragmentation. So it seems the real issue is holding a lock while
> doing the block discard?
>
> > So far, no issues have been observed or reported with typical SSD setup=
s
> > under months of high pressure. This issue was found during my code
> > review. But by hacking the kernel a bit: adding a mdelay(100) in the
> > async discard path, this issue will be observable with WARNING triggere=
d
> > by the wrong GFP and cond_resched in the bio layer.
>
> I think that makes an assumption on how slow the SSD discard is. Some
> SSD can be really slow. We want our kernel to work for those slow
> discard SSD cases as well.
>
> > So let's fix this issue in a safe way: remove the synchronous discard i=
n
> > the swap allocation path. And when order 0 is failing with all cluster
> > list drained on all swap devices, try to do a discard following the swa=
p
>
> I don't feel that changing the discard behavior is justified here, the
> real fix is discarding with less lock held. Am I missing something?
> If I understand correctly, we should be able to keep the current
> discard ordering behavior, discard before the fragment list. But with
> less lock held as your current patch does.
>
> I suggest the allocation here detects there is a discard pending and
> running out of free blocks. Return there and indicate the need to
> discard. The caller performs the discard without holding the lock,
> similar to what you do with the order =3D=3D 0 case.

Thanks for the suggestion. Right, that sounds even better. My initial
though was that maybe we can just remove this discard completely since
it rarely helps, and if the SSD is really that slow, OOM under heavy
pressure might even be an acceptable behaviour. But to make it safer,
I made it do discard only when order 0 is failing so the code is
simpler.

Let me sent a V2 to handle the discard carefully to reduce potential impact=
.

> > device priority list. If any discards released some cluster, try the
> > allocation again. This way, we can still avoid OOM due to swap failure
> > if the hardware is very slow and memory pressure is extremely high.
> >
> > Cc: <[email-masked]>
> > Fixes: 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation fast =
path")
> > Signed-off-by: Kairui Song <[email-masked]>
> > ---
> >  mm/swapfile.c | 40 +++++++++++++++++++++++++++++++++-------
> >  1 file changed, 33 insertions(+), 7 deletions(-)
> >
> > diff --git a/mm/swapfile.c b/mm/swapfile.c
> > index cb2392ed8e0e..0d1924f6f495 100644
> > --- a/mm/swapfile.c
> > +++ b/mm/swapfile.c
> > @@ -1101,13 +1101,6 @@ static unsigned long cluster_alloc_swap_entry(st=
ruct swap_info_struct *si, int o
> >                         goto done;
> >         }
> >
> > -       /*
> > -        * We don't have free cluster but have some clusters in discard=
ing,
> > -        * do discard now and reclaim them.
> > -        */
> > -       if ((si->flags & SWP_PAGE_DISCARD) && swap_do_scheduled_discard=
(si))
> > -               goto new_cluster;
>
> Assume you follow my suggestion.
> Change this to some function to detect if there is a pending discard
> on this device. Return to the caller indicating that you need a
> discard for this device that has a pending discard.

Checking `!list_empty(si->discard_clusters)` should be good enough.

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From: Jacob Keller <[email-masked]>
Date: Thu, 09 Oct 2025 17:03:47 -0700
Subject: [PATCH net v3 2/6] ixgbevf: fix getting link speed data for E610
 devices
To: Przemek Kitszel <[email-masked]>, 
 Andrew Lunn <[email-masked]>, 
 "David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>, 
 Emil Tantilov <[email-masked]>, 
 Alexander Lobakin <[email-masked]>, 
 Willem de Bruijn <[email-masked]>, 
 Sridhar Samudrala <[email-masked]>, 
 Phani Burra <[email-masked]>, 
 Piotr Kwapulinski <[email-masked]>, 
 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>, 
 Jedrzej Jagielski <[email-masked]>
Cc: Konstantin Ilichev <[email-masked]>, 
 Milena Olech <[email-masked]>, [email-masked], 
 [email-masked], Jacob Keller <[email-masked]>, 
 Aleksandr Loktionov <[email-masked]>, [email-masked], 
 Rafal Romanowski <[email-masked]>
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From: Jedrzej Jagielski <[email-masked]>

E610 adapters no longer use the VFLINKS register to read PF's link
speed and linkup state. As a result VF driver cannot get actual link
state and it incorrectly reports 10G which is the default option.
It leads to a situation where even 1G adapters print 10G as actual
link speed. The same happens when PF driver set speed different than 10G.

Add new mailbox operation to let the VF driver request a PF driver
to provide actual link data. Update the mailbox api to v1.6.

Incorporate both ways of getting link status within the legacy
ixgbe_check_mac_link_vf() function.

Fixes: 4c44b450c69b ("ixgbevf: Add support for Intel(R) E610 device")
Co-developed-by: Andrzej Wilczynski <[email-masked]>
Signed-off-by: Andrzej Wilczynski <[email-masked]>
Reviewed-by: Przemek Kitszel <[email-masked]>
Reviewed-by: Aleksandr Loktionov <[email-masked]>
Cc: [email-masked]
Signed-off-by: Jedrzej Jagielski <[email-masked]>
Tested-by: Rafal Romanowski <[email-masked]>
Signed-off-by: Jacob Keller <[email-masked]>
---
 drivers/net/ethernet/intel/ixgbevf/defines.h      |   1 +
 drivers/net/ethernet/intel/ixgbevf/mbx.h          |   4 +
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |   6 +-
 drivers/net/ethernet/intel/ixgbevf/vf.c           | 137 +++++++++++++++++-----
 4 files changed, 116 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/defines.h b/drivers/net/ethernet/intel/ixgbevf/defines.h
index a9bc96f6399d..e177d1d58696 100644
--- a/drivers/net/ethernet/intel/ixgbevf/defines.h
+++ b/drivers/net/ethernet/intel/ixgbevf/defines.h
@@ -28,6 +28,7 @@
 
 /* Link speed */
 typedef u32 ixgbe_link_speed;
+#define IXGBE_LINK_SPEED_UNKNOWN	0
 #define IXGBE_LINK_SPEED_1GB_FULL	0x0020
 #define IXGBE_LINK_SPEED_10GB_FULL	0x0080
 #define IXGBE_LINK_SPEED_100_FULL	0x0008
diff --git a/drivers/net/ethernet/intel/ixgbevf/mbx.h b/drivers/net/ethernet/intel/ixgbevf/mbx.h
index 835bbcc5cc8e..c1494fd1f67b 100644
--- a/drivers/net/ethernet/intel/ixgbevf/mbx.h
+++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h
@@ -66,6 +66,7 @@ enum ixgbe_pfvf_api_rev {
 	ixgbe_mbox_api_13,	/* API version 1.3, linux/freebsd VF driver */
 	ixgbe_mbox_api_14,	/* API version 1.4, linux/freebsd VF driver */
 	ixgbe_mbox_api_15,	/* API version 1.5, linux/freebsd VF driver */
+	ixgbe_mbox_api_16,      /* API version 1.6, linux/freebsd VF driver */
 	/* This value should always be last */
 	ixgbe_mbox_api_unknown,	/* indicates that API version is not known */
 };
@@ -102,6 +103,9 @@ enum ixgbe_pfvf_api_rev {
 
 #define IXGBE_VF_GET_LINK_STATE 0x10 /* get vf link state */
 
+/* mailbox API, version 1.6 VF requests */
+#define IXGBE_VF_GET_PF_LINK_STATE	0x11 /* request PF to send link info */
+
 /* length of permanent address message returned from PF */
 #define IXGBE_VF_PERMADDR_MSG_LEN	4
 /* word in permanent address message with the current multicast type */
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 28e25641b167..92671638b428 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -2275,6 +2275,7 @@ static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
 	static const int api[] = {
+		ixgbe_mbox_api_16,
 		ixgbe_mbox_api_15,
 		ixgbe_mbox_api_14,
 		ixgbe_mbox_api_13,
@@ -2294,7 +2295,8 @@ static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
 		idx++;
 	}
 
-	if (hw->api_version >= ixgbe_mbox_api_15) {
+	/* Following is not supported by API 1.6, it is specific for 1.5 */
+	if (hw->api_version == ixgbe_mbox_api_15) {
 		hw->mbx.ops.init_params(hw);
 		memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
 		       sizeof(struct ixgbe_mbx_operations));
@@ -2651,6 +2653,7 @@ static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
 		case ixgbe_mbox_api_13:
 		case ixgbe_mbox_api_14:
 		case ixgbe_mbox_api_15:
+		case ixgbe_mbox_api_16:
 			if (adapter->xdp_prog &&
 			    hw->mac.max_tx_queues == rss)
 				rss = rss > 3 ? 2 : 1;
@@ -4645,6 +4648,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	case ixgbe_mbox_api_13:
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
+	case ixgbe_mbox_api_16:
 		netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
 				  (ETH_HLEN + ETH_FCS_LEN);
 		break;
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c
index dcaef34b88b6..f05246fb5a74 100644
--- a/drivers/net/ethernet/intel/ixgbevf/vf.c
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.c
@@ -313,6 +313,7 @@ int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
 	 * is not supported for this device type.
 	 */
 	switch (hw->api_version) {
+	case ixgbe_mbox_api_16:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_13:
@@ -382,6 +383,7 @@ int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
 	 * or if the operation is not supported for this device type.
 	 */
 	switch (hw->api_version) {
+	case ixgbe_mbox_api_16:
 	case ixgbe_mbox_api_15:
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_13:
@@ -552,6 +554,7 @@ static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
 	case ixgbe_mbox_api_13:
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
+	case ixgbe_mbox_api_16:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -624,6 +627,48 @@ static s32 ixgbevf_hv_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
 	return -EOPNOTSUPP;
 }
 
+/**
+ * ixgbevf_get_pf_link_state - Get PF's link status
+ * @hw: pointer to the HW structure
+ * @speed: link speed
+ * @link_up: indicate if link is up/down
+ *
+ * Ask PF to provide link_up state and speed of the link.
+ *
+ * Return: IXGBE_ERR_MBX in the case of mailbox error,
+ * -EOPNOTSUPP if the op is not supported or 0 on success.
+ */
+static int ixgbevf_get_pf_link_state(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
+				     bool *link_up)
+{
+	u32 msgbuf[3] = {};
+	int err;
+
+	switch (hw->api_version) {
+	case ixgbe_mbox_api_16:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	msgbuf[0] = IXGBE_VF_GET_PF_LINK_STATE;
+
+	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
+					 ARRAY_SIZE(msgbuf));
+	if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
+		err = IXGBE_ERR_MBX;
+		*speed = IXGBE_LINK_SPEED_UNKNOWN;
+		/* No need to set @link_up to false as it will be done by
+		 * ixgbe_check_mac_link_vf().
+		 */
+	} else {
+		*speed = msgbuf[1];
+		*link_up = msgbuf[2];
+	}
+
+	return err;
+}
+
 /**
  *  ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
  *  @hw: pointer to the HW structure
@@ -658,6 +703,58 @@ static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
 	return err;
 }
 
+/**
+ * ixgbe_read_vflinks - Read VFLINKS register
+ * @hw: pointer to the HW structure
+ * @speed: link speed
+ * @link_up: indicate if link is up/down
+ *
+ * Get linkup status and link speed from the VFLINKS register.
+ */
+static void ixgbe_read_vflinks(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
+			       bool *link_up)
+{
+	u32 vflinks = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+	/* if link status is down no point in checking to see if PF is up */
+	if (!(vflinks & IXGBE_LINKS_UP)) {
+		*link_up = false;
+		return;
+	}
+
+	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
+	 * before the link status is correct
+	 */
+	if (hw->mac.type == ixgbe_mac_82599_vf) {
+		for (int i = 0; i < 5; i++) {
+			udelay(100);
+			vflinks = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
+
+			if (!(vflinks & IXGBE_LINKS_UP)) {
+				*link_up = false;
+				return;
+			}
+		}
+	}
+
+	/* We reached this point so there's link */
+	*link_up = true;
+
+	switch (vflinks & IXGBE_LINKS_SPEED_82599) {
+	case IXGBE_LINKS_SPEED_10G_82599:
+		*speed = IXGBE_LINK_SPEED_10GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_1G_82599:
+		*speed = IXGBE_LINK_SPEED_1GB_FULL;
+		break;
+	case IXGBE_LINKS_SPEED_100_82599:
+		*speed = IXGBE_LINK_SPEED_100_FULL;
+		break;
+	default:
+		*speed = IXGBE_LINK_SPEED_UNKNOWN;
+	}
+}
+
 /**
  * ixgbevf_hv_set_vfta_vf - * Hyper-V variant - just a stub.
  * @hw: unused
@@ -705,7 +802,6 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 	struct ixgbe_mbx_info *mbx = &hw->mbx;
 	struct ixgbe_mac_info *mac = &hw->mac;
 	s32 ret_val = 0;
-	u32 links_reg;
 	u32 in_msg = 0;
 
 	/* If we were hit with a reset drop the link */
@@ -715,36 +811,14 @@ static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
 	if (!mac->get_link_status)
 		goto out;
 
-	/* if link status is down no point in checking to see if pf is up */
-	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
-	if (!(links_reg & IXGBE_LINKS_UP))
-		goto out;
-
-	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
-	 * before the link status is correct
-	 */
-	if (mac->type == ixgbe_mac_82599_vf) {
-		int i;
-
-		for (i = 0; i < 5; i++) {
-			udelay(100);
-			links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
-
-			if (!(links_reg & IXGBE_LINKS_UP))
-				goto out;
-		}
-	}
-
-	switch (links_reg & IXGBE_LINKS_SPEED_82599) {
-	case IXGBE_LINKS_SPEED_10G_82599:
-		*speed = IXGBE_LINK_SPEED_10GB_FULL;
-		break;
-	case IXGBE_LINKS_SPEED_1G_82599:
-		*speed = IXGBE_LINK_SPEED_1GB_FULL;
-		break;
-	case IXGBE_LINKS_SPEED_100_82599:
-		*speed = IXGBE_LINK_SPEED_100_FULL;
-		break;
+	if (hw->mac.type == ixgbe_mac_e610_vf) {
+		ret_val = ixgbevf_get_pf_link_state(hw, speed, link_up);
+		if (ret_val)
+			goto out;
+	} else {
+		ixgbe_read_vflinks(hw, speed, link_up);
+		if (*link_up == false)
+			goto out;
 	}
 
 	/* if the read failed it could just be a mailbox collision, best wait
@@ -951,6 +1025,7 @@ int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
 	case ixgbe_mbox_api_13:
 	case ixgbe_mbox_api_14:
 	case ixgbe_mbox_api_15:
+	case ixgbe_mbox_api_16:
 		break;
 	default:
 		return 0;

-- 
2.51.0.rc1.197.g6d975e95c9d7

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From: Jacob Keller <[email-masked]>
Subject: [PATCH net v3 0/6] Intel Wired LAN Driver Updates 2025-10-01
 (idpf, ixgbe, ixgbevf)
Date: Thu, 09 Oct 2025 17:03:45 -0700
To: Przemek Kitszel <[email-masked]>, 
 Andrew Lunn <[email-masked]>, 
 "David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>, 
 Emil Tantilov <[email-masked]>, 
 Alexander Lobakin <[email-masked]>, 
 Willem de Bruijn <[email-masked]>, 
 Sridhar Samudrala <[email-masked]>, 
 Phani Burra <[email-masked]>, 
 Piotr Kwapulinski <[email-masked]>, 
 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>, 
 Jedrzej Jagielski <[email-masked]>
Cc: Konstantin Ilichev <[email-masked]>, 
 Milena Olech <[email-masked]>, [email-masked], 
 [email-masked], Jacob Keller <[email-masked]>, 
 Aleksandr Loktionov <[email-masked]>, 
 Samuel Salin <[email-masked]>, [email-masked], 
 Rafal Romanowski <[email-masked]>, 
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 Paul Menzel <[email-masked]>
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For idpf:
Milena fixes a memory leak in the idpf reset logic when the driver resets
with an outstanding Tx timestamp.

For ixgbe and ixgbevf:
Jedrzej fixes an issue with reporting link speed on E610 VFs.

Jedrzej also fixes the VF mailbox API incompatibilities caused by the
confusion with API v1.4, v1.5, and v1.6. The v1.4 API introduced IPSEC
offload, but this was only supported on Linux hosts. The v1.5 API
introduced a new mailbox API which is necessary to resolve issues on ESX
hosts. The v1.6 API introduced a new link management API for E610. Jedrzej
introduces a new v1.7 API with a feature negotiation which enables properly
checking if features such as IPSEC or the ESX mailbox APIs are supported.
This resolves issues with compatibility on different hosts, and aligns the
API across hosts instead of having Linux require custom mailbox API
versions for IPSEC offload.

Koichiro fixes a KASAN use-after-free bug in ixgbe_remove().

Signed-off-by: Jacob Keller <[email-masked]>
---
Changes in v3:
- Rebase and verified compilation issues are resolved.
- Configured b4 to exclude undeliverable addresses.
- Link to v2: https://lore.kernel.org/r/[email-masked]

Changes in v2:
- Drop Emil's idpf_vport_open race fix for now.
- Add my signature.
- Link to v1: https://lore.kernel.org/r/[email-masked]

---
Jedrzej Jagielski (4):
      ixgbevf: fix getting link speed data for E610 devices
      ixgbe: handle IXGBE_VF_GET_PF_LINK_STATE mailbox operation
      ixgbevf: fix mailbox API compatibility by negotiating supported features
      ixgbe: handle IXGBE_VF_FEATURES_NEGOTIATE mbox cmd

Koichiro Den (1):
      ixgbe: fix too early devlink_free() in ixgbe_remove()

Milena Olech (1):
      idpf: cleanup remaining SKBs in PTP flows

 drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h       |  15 ++
 drivers/net/ethernet/intel/ixgbevf/defines.h       |   1 +
 drivers/net/ethernet/intel/ixgbevf/ixgbevf.h       |   7 +
 drivers/net/ethernet/intel/ixgbevf/mbx.h           |   8 +
 drivers/net/ethernet/intel/ixgbevf/vf.h            |   1 +
 drivers/net/ethernet/intel/idpf/idpf_ptp.c         |   3 +
 .../net/ethernet/intel/idpf/idpf_virtchnl_ptp.c    |   1 +
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c      |   3 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c     |  79 +++++++++
 drivers/net/ethernet/intel/ixgbevf/ipsec.c         |  10 ++
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c  |  34 +++-
 drivers/net/ethernet/intel/ixgbevf/vf.c            | 182 +++++++++++++++++----
 12 files changed, 310 insertions(+), 34 deletions(-)
---
base-commit: fea8cdf6738a8b25fccbb7b109b440795a0892cb
change-id: 20251001-jk-iwl-net-2025-10-01-92cd2a626ff7

Best regards,
--  
Jacob Keller <[email-masked]>

From - Fri Oct 17 14:26:24 2025
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Date: Thu, 09 Oct 2025 11:24:04 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
 [email-masked],
 Luo Gengkun <[email-masked]>,
 Wattson CI <[email-masked]>,
 Linus Torvalds <[email-masked]>,
 Runping Lai <[email-masked]>
Subject: [for-linus][PATCH 5/5] tracing: Have trace_marker use per-cpu data to read user space
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From: Steven Rostedt <[email-masked]>

It was reported that using __copy_from_user_inatomic() can actually
schedule. Which is bad when preemption is disabled. Even though there's
logic to check in_atomic() is set, but this is a nop when the kernel is
configured with PREEMPT_NONE. This is due to page faulting and the code
could schedule with preemption disabled.

Link: https://lore.kernel.org/all/[email-masked]/

The solution was to change the __copy_from_user_inatomic() to
copy_from_user_nofault(). But then it was reported that this caused a
regression in Android. There's several applications writing into
trace_marker() in Android, but now instead of showing the expected data,
it is showing:

  tracing_mark_write: <faulted>

After reverting the conversion to copy_from_user_nofault(), Android was
able to get the data again.

Writes to the trace_marker is a way to efficiently and quickly enter data
into the Linux tracing buffer. It takes no locks and was designed to be as
non-intrusive as possible. This means it cannot allocate memory, and must
use pre-allocated data.

A method that is actively being worked on to have faultable system call
tracepoints read user space data is to allocate per CPU buffers, and use
them in the callback. The method uses a technique similar to seqcount.
That is something like this:

	preempt_disable();
	cpu = smp_processor_id();
	buffer = this_cpu_ptr(&pre_allocated_cpu_buffers, cpu);
	do {
		cnt = nr_context_switches_cpu(cpu);
		migrate_disable();
		preempt_enable();
		ret = copy_from_user(buffer, ptr, size);
		preempt_disable();
		migrate_enable();
	} while (!ret && cnt != nr_context_switches_cpu(cpu));

	if (!ret)
		ring_buffer_write(buffer);
	preempt_enable();

It's a little more involved than that, but the above is the basic logic.
The idea is to acquire the current CPU buffer, disable migration, and then
enable preemption. At this moment, it can safely use copy_from_user().
After reading the data from user space, it disables preemption again. It
then checks to see if there was any new scheduling on this CPU. If there
was, it must assume that the buffer was corrupted by another task. If
there wasn't, then the buffer is still valid as only tasks in preemptable
context can write to this buffer and only those that are running on the
CPU.

By using this method, where trace_marker open allocates the per CPU
buffers, trace_marker writes can access user space and even fault it in,
without having to allocate or take any locks of its own.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Cc: Luo Gengkun <[email-masked]>
Cc: Wattson CI <[email-masked]>
Cc: Linus Torvalds <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: 3d62ab32df065 ("tracing: Fix tracing_marker may trigger page fault during preempt_disable")
Reported-by: Runping Lai <[email-masked]>
Tested-by: Runping Lai <[email-masked]>
Closes: https://lore.kernel.org/linux-trace-kernel/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace.c | 268 +++++++++++++++++++++++++++++++++++--------
 1 file changed, 220 insertions(+), 48 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b3c94fbaf002..0fd582651293 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4791,12 +4791,6 @@ int tracing_single_release_file_tr(struct inode *inode, struct file *filp)
 	return single_release(inode, filp);
 }
 
-static int tracing_mark_open(struct inode *inode, struct file *filp)
-{
-	stream_open(inode, filp);
-	return tracing_open_generic_tr(inode, filp);
-}
-
 static int tracing_release(struct inode *inode, struct file *file)
 {
 	struct trace_array *tr = inode->i_private;
@@ -7163,7 +7157,7 @@ tracing_free_buffer_release(struct inode *inode, struct file *filp)
 
 #define TRACE_MARKER_MAX_SIZE		4096
 
-static ssize_t write_marker_to_buffer(struct trace_array *tr, const char __user *ubuf,
+static ssize_t write_marker_to_buffer(struct trace_array *tr, const char *buf,
 				      size_t cnt, unsigned long ip)
 {
 	struct ring_buffer_event *event;
@@ -7173,20 +7167,11 @@ static ssize_t write_marker_to_buffer(struct trace_array *tr, const char __user
 	int meta_size;
 	ssize_t written;
 	size_t size;
-	int len;
-
-/* Used in tracing_mark_raw_write() as well */
-#define FAULTED_STR "<faulted>"
-#define FAULTED_SIZE (sizeof(FAULTED_STR) - 1) /* '\0' is already accounted for */
 
 	meta_size = sizeof(*entry) + 2;  /* add '\0' and possible '\n' */
  again:
 	size = cnt + meta_size;
 
-	/* If less than "<faulted>", then make sure we can still add that */
-	if (cnt < FAULTED_SIZE)
-		size += FAULTED_SIZE - cnt;
-
 	buffer = tr->array_buffer.buffer;
 	event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, size,
 					    tracing_gen_ctx());
@@ -7196,9 +7181,6 @@ static ssize_t write_marker_to_buffer(struct trace_array *tr, const char __user
 		 * make it smaller and try again.
 		 */
 		if (size > ring_buffer_max_event_size(buffer)) {
-			/* cnt < FAULTED size should never be bigger than max */
-			if (WARN_ON_ONCE(cnt < FAULTED_SIZE))
-				return -EBADF;
 			cnt = ring_buffer_max_event_size(buffer) - meta_size;
 			/* The above should only happen once */
 			if (WARN_ON_ONCE(cnt + meta_size == size))
@@ -7212,14 +7194,8 @@ static ssize_t write_marker_to_buffer(struct trace_array *tr, const char __user
 
 	entry = ring_buffer_event_data(event);
 	entry->ip = ip;
-
-	len = copy_from_user_nofault(&entry->buf, ubuf, cnt);
-	if (len) {
-		memcpy(&entry->buf, FAULTED_STR, FAULTED_SIZE);
-		cnt = FAULTED_SIZE;
-		written = -EFAULT;
-	} else
-		written = cnt;
+	memcpy(&entry->buf, buf, cnt);
+	written = cnt;
 
 	if (tr->trace_marker_file && !list_empty(&tr->trace_marker_file->triggers)) {
 		/* do not add \n before testing triggers, but add \0 */
@@ -7243,6 +7219,169 @@ static ssize_t write_marker_to_buffer(struct trace_array *tr, const char __user
 	return written;
 }
 
+struct trace_user_buf {
+	char		*buf;
+};
+
+struct trace_user_buf_info {
+	struct trace_user_buf __percpu	*tbuf;
+	int				ref;
+};
+
+
+static DEFINE_MUTEX(trace_user_buffer_mutex);
+static struct trace_user_buf_info *trace_user_buffer;
+
+static void trace_user_fault_buffer_free(struct trace_user_buf_info *tinfo)
+{
+	char *buf;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		buf = per_cpu_ptr(tinfo->tbuf, cpu)->buf;
+		kfree(buf);
+	}
+	free_percpu(tinfo->tbuf);
+	kfree(tinfo);
+}
+
+static int trace_user_fault_buffer_enable(void)
+{
+	struct trace_user_buf_info *tinfo;
+	char *buf;
+	int cpu;
+
+	guard(mutex)(&trace_user_buffer_mutex);
+
+	if (trace_user_buffer) {
+		trace_user_buffer->ref++;
+		return 0;
+	}
+
+	tinfo = kmalloc(sizeof(*tinfo), GFP_KERNEL);
+	if (!tinfo)
+		return -ENOMEM;
+
+	tinfo->tbuf = alloc_percpu(struct trace_user_buf);
+	if (!tinfo->tbuf) {
+		kfree(tinfo);
+		return -ENOMEM;
+	}
+
+	tinfo->ref = 1;
+
+	/* Clear each buffer in case of error */
+	for_each_possible_cpu(cpu) {
+		per_cpu_ptr(tinfo->tbuf, cpu)->buf = NULL;
+	}
+
+	for_each_possible_cpu(cpu) {
+		buf = kmalloc_node(TRACE_MARKER_MAX_SIZE, GFP_KERNEL,
+				   cpu_to_node(cpu));
+		if (!buf) {
+			trace_user_fault_buffer_free(tinfo);
+			return -ENOMEM;
+		}
+		per_cpu_ptr(tinfo->tbuf, cpu)->buf = buf;
+	}
+
+	trace_user_buffer = tinfo;
+
+	return 0;
+}
+
+static void trace_user_fault_buffer_disable(void)
+{
+	struct trace_user_buf_info *tinfo;
+
+	guard(mutex)(&trace_user_buffer_mutex);
+
+	tinfo = trace_user_buffer;
+
+	if (WARN_ON_ONCE(!tinfo))
+		return;
+
+	if (--tinfo->ref)
+		return;
+
+	trace_user_fault_buffer_free(tinfo);
+	trace_user_buffer = NULL;
+}
+
+/* Must be called with preemption disabled */
+static char *trace_user_fault_read(struct trace_user_buf_info *tinfo,
+				   const char __user *ptr, size_t size,
+				   size_t *read_size)
+{
+	int cpu = smp_processor_id();
+	char *buffer = per_cpu_ptr(tinfo->tbuf, cpu)->buf;
+	unsigned int cnt;
+	int trys = 0;
+	int ret;
+
+	if (size > TRACE_MARKER_MAX_SIZE)
+		size = TRACE_MARKER_MAX_SIZE;
+	*read_size = 0;
+
+	/*
+	 * This acts similar to a seqcount. The per CPU context switches are
+	 * recorded, migration is disabled and preemption is enabled. The
+	 * read of the user space memory is copied into the per CPU buffer.
+	 * Preemption is disabled again, and if the per CPU context switches count
+	 * is still the same, it means the buffer has not been corrupted.
+	 * If the count is different, it is assumed the buffer is corrupted
+	 * and reading must be tried again.
+	 */
+
+	do {
+		/*
+		 * If for some reason, copy_from_user() always causes a context
+		 * switch, this would then cause an infinite loop.
+		 * If this task is preempted by another user space task, it
+		 * will cause this task to try again. But just in case something
+		 * changes where the copying from user space causes another task
+		 * to run, prevent this from going into an infinite loop.
+		 * 100 tries should be plenty.
+		 */
+		if (WARN_ONCE(trys++ > 100, "Error: Too many tries to read user space"))
+			return NULL;
+
+		/* Read the current CPU context switch counter */
+		cnt = nr_context_switches_cpu(cpu);
+
+		/*
+		 * Preemption is going to be enabled, but this task must
+		 * remain on this CPU.
+		 */
+		migrate_disable();
+
+		/*
+		 * Now preemption is being enabed and another task can come in
+		 * and use the same buffer and corrupt our data.
+		 */
+		preempt_enable_notrace();
+
+		ret = __copy_from_user(buffer, ptr, size);
+
+		preempt_disable_notrace();
+		migrate_enable();
+
+		/* if it faulted, no need to test if the buffer was corrupted */
+		if (ret)
+			return NULL;
+
+		/*
+		 * Preemption is disabled again, now check the per CPU context
+		 * switch counter. If it doesn't match, then another user space
+		 * process may have schedule in and corrupted our buffer. In that
+		 * case the copying must be retried.
+		 */
+	} while (nr_context_switches_cpu(cpu) != cnt);
+
+	*read_size = size;
+	return buffer;
+}
+
 static ssize_t
 tracing_mark_write(struct file *filp, const char __user *ubuf,
 					size_t cnt, loff_t *fpos)
@@ -7250,6 +7389,8 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
 	struct trace_array *tr = filp->private_data;
 	ssize_t written = -ENODEV;
 	unsigned long ip;
+	size_t size;
+	char *buf;
 
 	if (tracing_disabled)
 		return -EINVAL;
@@ -7263,6 +7404,16 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
 	if (cnt > TRACE_MARKER_MAX_SIZE)
 		cnt = TRACE_MARKER_MAX_SIZE;
 
+	/* Must have preemption disabled while having access to the buffer */
+	guard(preempt_notrace)();
+
+	buf = trace_user_fault_read(trace_user_buffer, ubuf, cnt, &size);
+	if (!buf)
+		return -EFAULT;
+
+	if (cnt > size)
+		cnt = size;
+
 	/* The selftests expect this function to be the IP address */
 	ip = _THIS_IP_;
 
@@ -7270,32 +7421,27 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
 	if (tr == &global_trace) {
 		guard(rcu)();
 		list_for_each_entry_rcu(tr, &marker_copies, marker_list) {
-			written = write_marker_to_buffer(tr, ubuf, cnt, ip);
+			written = write_marker_to_buffer(tr, buf, cnt, ip);
 			if (written < 0)
 				break;
 		}
 	} else {
-		written = write_marker_to_buffer(tr, ubuf, cnt, ip);
+		written = write_marker_to_buffer(tr, buf, cnt, ip);
 	}
 
 	return written;
 }
 
 static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
-					  const char __user *ubuf, size_t cnt)
+					  const char *buf, size_t cnt)
 {
 	struct ring_buffer_event *event;
 	struct trace_buffer *buffer;
 	struct raw_data_entry *entry;
 	ssize_t written;
-	int size;
-	int len;
-
-#define FAULT_SIZE_ID (FAULTED_SIZE + sizeof(int))
+	size_t size;
 
 	size = sizeof(*entry) + cnt;
-	if (cnt < FAULT_SIZE_ID)
-		size += FAULT_SIZE_ID - cnt;
 
 	buffer = tr->array_buffer.buffer;
 
@@ -7309,14 +7455,8 @@ static ssize_t write_raw_marker_to_buffer(struct trace_array *tr,
 		return -EBADF;
 
 	entry = ring_buffer_event_data(event);
-
-	len = copy_from_user_nofault(&entry->id, ubuf, cnt);
-	if (len) {
-		entry->id = -1;
-		memcpy(&entry->buf, FAULTED_STR, FAULTED_SIZE);
-		written = -EFAULT;
-	} else
-		written = cnt;
+	memcpy(&entry->id, buf, cnt);
+	written = cnt;
 
 	__buffer_unlock_commit(buffer, event);
 
@@ -7329,8 +7469,8 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 {
 	struct trace_array *tr = filp->private_data;
 	ssize_t written = -ENODEV;
-
-#define FAULT_SIZE_ID (FAULTED_SIZE + sizeof(int))
+	size_t size;
+	char *buf;
 
 	if (tracing_disabled)
 		return -EINVAL;
@@ -7342,6 +7482,17 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 	if (cnt < sizeof(unsigned int))
 		return -EINVAL;
 
+	/* Must have preemption disabled while having access to the buffer */
+	guard(preempt_notrace)();
+
+	buf = trace_user_fault_read(trace_user_buffer, ubuf, cnt, &size);
+	if (!buf)
+		return -EFAULT;
+
+	/* raw write is all or nothing */
+	if (cnt > size)
+		return -EINVAL;
+
 	/* The global trace_marker_raw can go to multiple instances */
 	if (tr == &global_trace) {
 		guard(rcu)();
@@ -7357,6 +7508,27 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,
 	return written;
 }
 
+static int tracing_mark_open(struct inode *inode, struct file *filp)
+{
+	int ret;
+
+	ret = trace_user_fault_buffer_enable();
+	if (ret < 0)
+		return ret;
+
+	stream_open(inode, filp);
+	ret = tracing_open_generic_tr(inode, filp);
+	if (ret < 0)
+		trace_user_fault_buffer_disable();
+	return ret;
+}
+
+static int tracing_mark_release(struct inode *inode, struct file *file)
+{
+	trace_user_fault_buffer_disable();
+	return tracing_release_generic_tr(inode, file);
+}
+
 static int tracing_clock_show(struct seq_file *m, void *v)
 {
 	struct trace_array *tr = m->private;
@@ -7764,13 +7936,13 @@ static const struct file_operations tracing_free_buffer_fops = {
 static const struct file_operations tracing_mark_fops = {
 	.open		= tracing_mark_open,
 	.write		= tracing_mark_write,
-	.release	= tracing_release_generic_tr,
+	.release	= tracing_mark_release,
 };
 
 static const struct file_operations tracing_mark_raw_fops = {
 	.open		= tracing_mark_open,
 	.write		= tracing_mark_raw_write,
-	.release	= tracing_release_generic_tr,
+	.release	= tracing_mark_release,
 };
 
 static const struct file_operations trace_clock_fops = {
-- 
2.51.0

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From: =?utf-8?q?Andr=C3=A9_Draszik?= <[email-masked]>
Subject: [PATCH v2 00/10] pmdomain: samsung: add supoort for Google GS101
Date: Thu, 09 Oct 2025 16:25:02 +0100
To: Krzysztof Kozlowski <[email-masked]>, 
 Alim Akhtar <[email-masked]>, Rob Herring <[email-masked]>, 
 Conor Dooley <[email-masked]>, 
 Krzysztof Kozlowski <[email-masked]>, 
 Ulf Hansson <[email-masked]>, 
 Marek Szyprowski <[email-masked]>
Cc: Peter Griffin <[email-masked]>, 
 Tudor Ambarus <[email-masked]>, 
 Will McVicker <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], 
 =?utf-8?q?Andr=C3=A9_Draszik?= <[email-masked]>, 
 [email-masked], 
 Krzysztof Kozlowski <[email-masked]>
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Hi,

This series adds support for the power domains on Google GS101. It's
fairly similar to SoCs already supported by this driver, except that
register acces does not work via plain ioremap() / readl() / writel().
Instead, the regmap created by the PMU driver must be used (which uses
Arm SMCC calls under the hood).

The DT update to add the new required properties on gs101 will be
posted separately.

Signed-off-by: André Draszik <[email-masked]>
---
Changes in v2:
- Krzysztof:
  - move google,gs101-pmu binding into separate file
  - mark devm_kstrdup_const() patch as fix
  - use bool for need_early_sync_state
  - merge patches 8 and 10 from v1 series into one patch
- collect tags
- Link to v1: https://lore.kernel.org/r/[email-masked]

---
André Draszik (10):
      dt-bindings: power: samsung: add google,gs101-pd
      dt-bindings: soc: samsung: exynos-pmu: move gs101-pmu into separate binding
      dt-bindings: soc: samsung: gs101-pmu: allow power domains as children
      pmdomain: samsung: plug potential memleak during probe
      pmdomain: samsung: convert to using regmap
      pmdomain: samsung: convert to regmap_read_poll_timeout()
      pmdomain: samsung: don't hardcode offset for registers to 0 and 4
      pmdomain: samsung: selectively handle enforced sync_state
      pmdomain: samsung: add support for google,gs101-pd
      pmdomain: samsung: use dev_err() instead of pr_err()

 .../devicetree/bindings/power/pd-samsung.yaml      |   1 +
 .../bindings/soc/google/google,gs101-pmu.yaml      | 107 +++++++++++++++++
 .../bindings/soc/samsung/exynos-pmu.yaml           |  20 ----
 MAINTAINERS                                        |   1 +
 drivers/pmdomain/samsung/exynos-pm-domains.c       | 126 +++++++++++++++------
 5 files changed, 201 insertions(+), 54 deletions(-)
---
base-commit: a5f97c90e75f09f24ece2dca34168722b140a798
change-id: 20251001-gs101-pd-d4dc97d70a84

Best regards,
-- 
André Draszik <[email-masked]>

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From: =?utf-8?q?Andr=C3=A9_Draszik?= <[email-masked]>
Date: Thu, 09 Oct 2025 16:25:06 +0100
Subject: [PATCH v2 04/10] pmdomain: samsung: plug potential memleak during
 probe
To: Krzysztof Kozlowski <[email-masked]>, 
 Alim Akhtar <[email-masked]>, Rob Herring <[email-masked]>, 
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of_genpd_add_provider_simple() could fail, in which case this code
leaks the domain name, pd->pd.name.

Use devm_kstrdup_const() to plug this leak. As a side-effect, we can
simplify existing error handling.

Fixes: c09a3e6c97f0 ("soc: samsung: pm_domains: Convert to regular platform driver")
Cc: [email-masked]
Reviewed-by: Peter Griffin <[email-masked]>
Signed-off-by: André Draszik <[email-masked]>

---
v2:
reword commit message, as this isn't a pure simplification
---
 drivers/pmdomain/samsung/exynos-pm-domains.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/pmdomain/samsung/exynos-pm-domains.c b/drivers/pmdomain/samsung/exynos-pm-domains.c
index 5d478bb37ad68afc7aed7c6ae19b5fefc94a9035..f53e1bd2479807988f969774b4b7b4c5739c1aba 100644
--- a/drivers/pmdomain/samsung/exynos-pm-domains.c
+++ b/drivers/pmdomain/samsung/exynos-pm-domains.c
@@ -92,13 +92,14 @@ static const struct of_device_id exynos_pm_domain_of_match[] = {
 	{ },
 };
 
-static const char *exynos_get_domain_name(struct device_node *node)
+static const char *exynos_get_domain_name(struct device *dev,
+					  struct device_node *node)
 {
 	const char *name;
 
 	if (of_property_read_string(node, "label", &name) < 0)
 		name = kbasename(node->full_name);
-	return kstrdup_const(name, GFP_KERNEL);
+	return devm_kstrdup_const(dev, name, GFP_KERNEL);
 }
 
 static int exynos_pd_probe(struct platform_device *pdev)
@@ -115,15 +116,13 @@ static int exynos_pd_probe(struct platform_device *pdev)
 	if (!pd)
 		return -ENOMEM;
 
-	pd->pd.name = exynos_get_domain_name(np);
+	pd->pd.name = exynos_get_domain_name(dev, np);
 	if (!pd->pd.name)
 		return -ENOMEM;
 
 	pd->base = of_iomap(np, 0);
-	if (!pd->base) {
-		kfree_const(pd->pd.name);
+	if (!pd->base)
 		return -ENODEV;
-	}
 
 	pd->pd.power_off = exynos_pd_power_off;
 	pd->pd.power_on = exynos_pd_power_on;

-- 
2.51.0.710.ga91ca5db03-goog

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Date: Thu, 9 Oct 2025 17:05:52 +0200
Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
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From: Maciej Fijalkowski <[email-masked]>
Date: Thu, 9 Oct 2025 16:27:50 +0200

> On Wed, Oct 08, 2025 at 06:56:59PM +0200, Alexander Lobakin wrote:
>> Turned out certain clearly invalid values passed in &xdp_desc from
>> userspace can pass xp_{,un}aligned_validate_desc() and then lead
>> to UBs or just invalid frames to be queued for xmit.
>>
>> desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
>> can cause positive integer overflow and wraparound, the same way low
>> enough desc->addr with a non-zero pool->tx_metadata_len can cause
>> negative integer overflow. Both scenarios can then pass the
>> validation successfully.
> 
> Hmm, when underflow happens the addr would be enormous, passing
> existing validation would really be rare. However let us fix it while at
> it.

It depends on how big pool->addrs_cnt can be. I haven't dug deep into
the internals, is this value also userspace-supplied or generated by the
core code and is always valid?

Also see below (xp_aligned_validate_desc()).

> 
>> This doesn't happen with valid XSk applications, but can be used
>> to perform attacks.
>>
>> Always promote desc->len to ``u64`` first to exclude positive
>> overflows of it. Use explicit check_{add,sub}_overflow() when
>> validating desc->addr (which is ``u64`` already).
>>
>> bloat-o-meter reports a little growth of the code size:
>>
>> add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
>> Function                                     old     new   delta
>> xskq_cons_peek_desc                          299     330     +31
>> xsk_tx_peek_release_desc_batch               973    1002     +29
>> xsk_generic_xmit                            3148    3132     -16
>>
>> but hopefully this doesn't hurt the performance much.
> 
> Let us be fully transparent and link the previous discussion here?

As per a quick discussion with the maintainers yesterday, we would like
to not mention FSB-sponsored code/companies in any way...

> 
> I was commenting that breaking up single statement to multiple branches
> might affect subtly performance as this code is executed per each

The compilers successfully merge such stuff.

The only overhead introduced is the calls to
__builtin_{add,sub}_overflow(), they are definitely inlined (compiler
intrinsics), also check_{add,sub}_overflow() are wrapped with
unlikely(), but still may take a couple instructions.

> descriptor. Jason tested copy+aligned mode, let us see if zc+unaligned
> mode is affected.
> 
> <rant>
> I am also thinking about test side, but xsk tx metadata came with a
> separate test (xdp_hw_metadata), which was rather about testing positive
> cases. That is probably a separate discussion, but metadata negative
> tests should appear somewhere, I suppose xskxceiver would be a good fit,
> but then, should we merge the existing logic from xdp_hw_metadata?
> </rant>

I'd love to write a test that would prove that invalid descriptors are
successfully rejected, but rather separately from this particular fix.

[...]

>> @@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 options)
>>  static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>>  					    struct xdp_desc *desc)
>>  {
>> -	u64 addr = desc->addr - pool->tx_metadata_len;
>> -	u64 len = desc->len + pool->tx_metadata_len;
>> -	u64 offset = addr & (pool->chunk_size - 1);
>> +	u64 len = desc->len;
>> +	u64 addr, offset;
>>  
>> -	if (!desc->len)
>> +	if (!len)
> 
> This is yet another thing being fixed here as for non-zero tx_metadata_len
> we were allowing 0 length descriptors... :< overall feels like we relied
> too much on contract with userspace WRT descriptor layout.
> 
> If zc perf is fine, then:
> Reviewed-by: Maciej Fijalkowski <[email-masked]>
> 
>>  		return false;
>>  
>> -	if (offset + len > pool->chunk_size)
>> +	/* Can overflow if desc->addr < pool->tx_metadata_len */
>> +	if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
>> +		return false;
>> +
>> +	offset = addr & (pool->chunk_size - 1);

If there's an overflow and @addr went crazy, @offset can still be valid
as it's capped by pool->chunk_size here.

>> +
>> +	/*
>> +	 * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
>> +	 * (pool->chunk_size is ``u32``), @len is guaranteed
>> +	 * to be <= ``U32_MAX``.
>> +	 */
>> +	if (offset + len + pool->tx_metadata_len > pool->chunk_size)
>>  		return false;
>>  
>>  	if (addr >= pool->addrs_cnt)

But if pool->addrs_cnt is always valid, insanely big @addr would be
rejected here, right.

Thanks,
Olek

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Date: Thu, 09 Oct 2025 11:24:03 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
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Subject: [for-linus][PATCH 4/5] ring buffer: Propagate __rb_map_vma return value to caller
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From: Ankit Khushwaha <[email-masked]>

The return value from `__rb_map_vma()`, which rejects writable or
executable mappings (VM_WRITE, VM_EXEC, or !VM_MAYSHARE), was being
ignored. As a result the caller of `__rb_map_vma` always returned 0
even when the mapping had actually failed, allowing it to proceed
with an invalid VMA.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: 117c39200d9d7 ("ring-buffer: Introducing ring-buffer mapping functions")
Reported-by: [email-masked]
Closes: https://syzkaller.appspot.com/bug?id=194151be8eaebd826005329b2e123aecae714bdb
Signed-off-by: Ankit Khushwaha <[email-masked]>
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/ring_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 43460949ad3f..1244d2c5c384 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -7273,7 +7273,7 @@ int ring_buffer_map(struct trace_buffer *buffer, int cpu,
 		atomic_dec(&cpu_buffer->resize_disabled);
 	}
 
-	return 0;
+	return err;
 }
 
 int ring_buffer_unmap(struct trace_buffer *buffer, int cpu)
-- 
2.51.0

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Date: Thu, 09 Oct 2025 11:24:01 -0400
From: Steven Rostedt <[email-masked]>
To: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>,
 Mark Rutland <[email-masked]>,
 Mathieu Desnoyers <[email-masked]>,
 Andrew Morton <[email-masked]>,
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Subject: [for-linus][PATCH 2/5] tracing: Fix wakeup tracers on failure of acquiring calltime
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From: Steven Rostedt <[email-masked]>

The functions wakeup_graph_entry() and wakeup_graph_return() both call
func_prolog_preempt_disable() that will test if the data->disable is
already set and if not, increment it and disable preemption. If it was
set, it returns false and the caller exits.

The caller of this function must decrement the disable counter, but misses
doing so if the calltime fails to be acquired.

Instead of exiting out when calltime is NULL, change the logic to do the
work if it is not NULL and still do the clean up at the end of the
function if it is NULL.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: a485ea9e3ef3 ("tracing: Fix irqsoff and wakeup latency tracers when using function graph")
Reported-by: Sasha Levin <[email-masked]>
Closes: https://lore.kernel.org/linux-trace-kernel/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace_sched_wakeup.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index bf1cb80742ae..e3f2e4f56faa 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -138,12 +138,10 @@ static int wakeup_graph_entry(struct ftrace_graph_ent *trace,
 		return 0;
 
 	calltime = fgraph_reserve_data(gops->idx, sizeof(*calltime));
-	if (!calltime)
-		return 0;
-
-	*calltime = trace_clock_local();
-
-	ret = __trace_graph_entry(tr, trace, trace_ctx);
+	if (calltime) {
+		*calltime = trace_clock_local();
+		ret = __trace_graph_entry(tr, trace, trace_ctx);
+	}
 	local_dec(&data->disabled);
 	preempt_enable_notrace();
 
@@ -169,12 +167,10 @@ static void wakeup_graph_return(struct ftrace_graph_ret *trace,
 	rettime = trace_clock_local();
 
 	calltime = fgraph_retrieve_data(gops->idx, &size);
-	if (!calltime)
-		return;
+	if (calltime)
+		__trace_graph_return(tr, trace, trace_ctx, *calltime, rettime);
 
-	__trace_graph_return(tr, trace, trace_ctx, *calltime, rettime);
 	local_dec(&data->disabled);
-
 	preempt_enable_notrace();
 	return;
 }
-- 
2.51.0

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Date: Thu, 09 Oct 2025 11:24:02 -0400
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To: [email-masked]
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 Mark Rutland <[email-masked]>,
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Subject: [for-linus][PATCH 3/5] tracing: Fix irqoff tracers on failure of acquiring calltime
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From: Steven Rostedt <[email-masked]>

The functions irqsoff_graph_entry() and irqsoff_graph_return() both call
func_prolog_dec() that will test if the data->disable is already set and
if not, increment it and return. If it was set, it returns false and the
caller exits.

The caller of this function must decrement the disable counter, but misses
doing so if the calltime fails to be acquired.

Instead of exiting out when calltime is NULL, change the logic to do the
work if it is not NULL and still do the clean up at the end of the
function if it is NULL.

Cc: [email-masked]
Cc: Masami Hiramatsu <[email-masked]>
Cc: Mathieu Desnoyers <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Fixes: a485ea9e3ef3 ("tracing: Fix irqsoff and wakeup latency tracers when using function graph")
Reported-by: Sasha Levin <[email-masked]>
Closes: https://lore.kernel.org/linux-trace-kernel/[email-masked]/
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
---
 kernel/trace/trace_irqsoff.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 5496758b6c76..4c45c49b06c8 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -184,7 +184,7 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace,
 	unsigned long flags;
 	unsigned int trace_ctx;
 	u64 *calltime;
-	int ret;
+	int ret = 0;
 
 	if (ftrace_graph_ignore_func(gops, trace))
 		return 0;
@@ -202,13 +202,11 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace,
 		return 0;
 
 	calltime = fgraph_reserve_data(gops->idx, sizeof(*calltime));
-	if (!calltime)
-		return 0;
-
-	*calltime = trace_clock_local();
-
-	trace_ctx = tracing_gen_ctx_flags(flags);
-	ret = __trace_graph_entry(tr, trace, trace_ctx);
+	if (calltime) {
+		*calltime = trace_clock_local();
+		trace_ctx = tracing_gen_ctx_flags(flags);
+		ret = __trace_graph_entry(tr, trace, trace_ctx);
+	}
 	local_dec(&data->disabled);
 
 	return ret;
@@ -233,11 +231,10 @@ static void irqsoff_graph_return(struct ftrace_graph_ret *trace,
 
 	rettime = trace_clock_local();
 	calltime = fgraph_retrieve_data(gops->idx, &size);
-	if (!calltime)
-		return;
-
-	trace_ctx = tracing_gen_ctx_flags(flags);
-	__trace_graph_return(tr, trace, trace_ctx, *calltime, rettime);
+	if (calltime) {
+		trace_ctx = tracing_gen_ctx_flags(flags);
+		__trace_graph_return(tr, trace, trace_ctx, *calltime, rettime);
+	}
 	local_dec(&data->disabled);
 }
 
-- 
2.51.0

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Date: Thu, 9 Oct 2025 16:50:24 +0200
Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
To: Jason Xing <[email-masked]>
CC: Magnus Karlsson <[email-masked]>, Maciej Fijalkowski
	<[email-masked]>, Stanislav Fomichev <[email-masked]>, "Alexei
 Starovoitov" <[email-masked]>, Daniel Borkmann <[email-masked]>,
	"Jesper Dangaard Brouer" <[email-masked]>, John Fastabend
	<[email-masked]>, "David S. Miller" <[email-masked]>, Eric
 Dumazet <[email-masked]>, Jakub Kicinski <[email-masked]>, Paolo Abeni
	<[email-masked]>, "Simon Horman" <[email-masked]>, Kees Cook
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>
References: <[email-masked]>
 <[email-masked]>
From: Alexander Lobakin <[email-masked]>
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From: Jason Xing <[email-masked]>
Date: Thu, 9 Oct 2025 22:02:23 +0800

> On Thu, Oct 9, 2025 at 12:59 AM Alexander Lobakin
> <[email-masked]> wrote:
>>
>> Turned out certain clearly invalid values passed in &xdp_desc from
>> userspace can pass xp_{,un}aligned_validate_desc() and then lead
>> to UBs or just invalid frames to be queued for xmit.
>>
>> desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
>> can cause positive integer overflow and wraparound, the same way low
>> enough desc->addr with a non-zero pool->tx_metadata_len can cause
>> negative integer overflow. Both scenarios can then pass the
>> validation successfully.
>> This doesn't happen with valid XSk applications, but can be used
>> to perform attacks.
>>
>> Always promote desc->len to ``u64`` first to exclude positive
>> overflows of it. Use explicit check_{add,sub}_overflow() when
>> validating desc->addr (which is ``u64`` already).
>>
>> bloat-o-meter reports a little growth of the code size:
>>
>> add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
>> Function                                     old     new   delta
>> xskq_cons_peek_desc                          299     330     +31
>> xsk_tx_peek_release_desc_batch               973    1002     +29
>> xsk_generic_xmit                            3148    3132     -16
>>
>> but hopefully this doesn't hurt the performance much.
> 
> I don't see an evident point that might affect the performance. Since
> you said that, I tested by running './xdpsock -i eth1 -t -S -s 64' and
> didn't spot any degradation.

Thanks for testing!

> 
>>
>> Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
>> Cc: [email-masked] # 6.8+
>> Signed-off-by: Alexander Lobakin <[email-masked]>
> 
> Thanks for the fix!
> 
> Reviewed-by: Jason Xing <[email-masked]>
> 
>> ---
>>  net/xdp/xsk_queue.h | 45 +++++++++++++++++++++++++++++++++++----------
>>  1 file changed, 35 insertions(+), 10 deletions(-)
>>
>> diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
>> index f16f390370dc..1eb8d9f8b104 100644
>> --- a/net/xdp/xsk_queue.h
>> +++ b/net/xdp/xsk_queue.h
>> @@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 options)
>>  static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>>                                             struct xdp_desc *desc)
>>  {
>> -       u64 addr = desc->addr - pool->tx_metadata_len;
>> -       u64 len = desc->len + pool->tx_metadata_len;
>> -       u64 offset = addr & (pool->chunk_size - 1);
>> +       u64 len = desc->len;
>> +       u64 addr, offset;
>>
>> -       if (!desc->len)
>> +       if (!len)
>>                 return false;
>>
>> -       if (offset + len > pool->chunk_size)
>> +       /* Can overflow if desc->addr < pool->tx_metadata_len */
>> +       if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
>> +               return false;
>> +
>> +       offset = addr & (pool->chunk_size - 1);
>> +
>> +       /*
>> +        * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
>> +        * (pool->chunk_size is ``u32``), @len is guaranteed
>> +        * to be <= ``U32_MAX``.
>> +        */
>> +       if (offset + len + pool->tx_metadata_len > pool->chunk_size)
>>                 return false;
>>
>>         if (addr >= pool->addrs_cnt)
>> @@ -158,27 +168,42 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>>
>>         if (xp_unused_options_set(desc->options))
>>                 return false;
>> +
> 
> nit?

Yes, probably doesn't fit well for this particular fix. I have no strong
preference and can remove it if the community wishes.

> 
>>         return true;
>>  }
>>
>>  static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
>>                                               struct xdp_desc *desc)
>>  {
>> -       u64 addr = xp_unaligned_add_offset_to_addr(desc->addr) - pool->tx_metadata_len;
>> -       u64 len = desc->len + pool->tx_metadata_len;
>> +       u64 len = desc->len;
>> +       u64 addr, end;
>>
>> -       if (!desc->len)
>> +       if (!len)
>>                 return false;
>>
>> +       /* Can't overflow: @len is guaranteed to be <= ``U32_MAX`` */
>> +       len += pool->tx_metadata_len;
>>         if (len > pool->chunk_size)
>>                 return false;
>>
>> -       if (addr >= pool->addrs_cnt || addr + len > pool->addrs_cnt ||
>> -           xp_desc_crosses_non_contig_pg(pool, addr, len))
>> +       /* Can overflow if desc->addr is close to 0 */
>> +       if (check_sub_overflow(xp_unaligned_add_offset_to_addr(desc->addr),
>> +                              pool->tx_metadata_len, &addr))
>> +               return false;
>> +
>> +       if (addr >= pool->addrs_cnt)
>> +               return false;
>> +
>> +       /* Can overflow if pool->addrs_cnt is high enough */
>> +       if (check_add_overflow(addr, len, &end) || end > pool->addrs_cnt)
>> +               return false;
>> +
>> +       if (xp_desc_crosses_non_contig_pg(pool, addr, len))
>>                 return false;
>>
>>         if (xp_unused_options_set(desc->options))
>>                 return false;
>> +

Same here.

>>         return true;
>>  }

Thanks,
Olek

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From: Alex Deucher <[email-masked]>
Date: Thu, 9 Oct 2025 10:57:27 -0400
Subject: Re: [PATCH v2] Revert "drm/amd/display: Only restore backlight after
 amdgpu_dm_init or dm_resume"
To: Matthew Schwartz <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], 
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	[email-masked]
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Applied.  Thanks.

Alex

On Thu, Oct 9, 2025 at 8:51=E2=80=AFAM Matthew Schwartz
<[email-masked]> wrote:
>
> This fix regressed the original issue that commit d83c747a1225
> ("drm/amd/display: Fix brightness level not retained over reboot") solved=
,
> so revert it until a different approach to solve the regression that
> it caused with AMD_PRIVATE_COLOR is found.
>
> Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgp=
u_dm_init or dm_resume")
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
> Cc: [email-masked]
> Signed-off-by: Matthew Schwartz <[email-masked]>
> ---
> v1 -> v2:
> - Fix missing stable tag
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
>  2 files changed, 4 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/=
gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 8e1622bf7a42..21281e684b84 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -2081,8 +2081,6 @@ static int amdgpu_dm_init(struct amdgpu_device *ade=
v)
>
>         dc_hardware_init(adev->dm.dc);
>
> -       adev->dm.restore_backlight =3D true;
> -
>         adev->dm.hpd_rx_offload_wq =3D hpd_rx_irq_create_workqueue(adev);
>         if (!adev->dm.hpd_rx_offload_wq) {
>                 drm_err(adev_to_drm(adev), "failed to create hpd rx offlo=
ad workqueue.\n");
> @@ -3438,7 +3436,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_blo=
ck)
>                 dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
>
>                 dc_resume(dm->dc);
> -               adev->dm.restore_backlight =3D true;
>
>                 amdgpu_dm_irq_resume_early(adev);
>
> @@ -9965,6 +9962,7 @@ static void amdgpu_dm_commit_streams(struct drm_ato=
mic_state *state,
>         bool mode_set_reset_required =3D false;
>         u32 i;
>         struct dc_commit_streams_params params =3D {dc_state->streams, dc=
_state->stream_count};
> +       bool set_backlight_level =3D false;
>
>         /* Disable writeback */
>         for_each_old_connector_in_state(state, connector, old_con_state, =
i) {
> @@ -10084,6 +10082,7 @@ static void amdgpu_dm_commit_streams(struct drm_a=
tomic_state *state,
>                         acrtc->hw_mode =3D new_crtc_state->mode;
>                         crtc->hwmode =3D new_crtc_state->mode;
>                         mode_set_reset_required =3D true;
> +                       set_backlight_level =3D true;
>                 } else if (modereset_required(new_crtc_state)) {
>                         drm_dbg_atomic(dev,
>                                        "Atomic commit: RESET. crtc id %d:=
[%p]\n",
> @@ -10140,16 +10139,13 @@ static void amdgpu_dm_commit_streams(struct drm=
_atomic_state *state,
>          * to fix a flicker issue.
>          * It will cause the dm->actual_brightness is not the current pan=
el brightness
>          * level. (the dm->brightness is the correct panel level)
> -        * So we set the backlight level with dm->brightness value after =
initial
> -        * set mode. Use restore_backlight flag to avoid setting backligh=
t level
> -        * for every subsequent mode set.
> +        * So we set the backlight level with dm->brightness value after =
set mode
>          */
> -       if (dm->restore_backlight) {
> +       if (set_backlight_level) {
>                 for (i =3D 0; i < dm->num_of_edps; i++) {
>                         if (dm->backlight_dev[i])
>                                 amdgpu_dm_backlight_set_level(dm, i, dm->=
brightness[i]);
>                 }
> -               dm->restore_backlight =3D false;
>         }
>  }
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/=
gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> index 009f206226f0..db75e991ac7b 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> @@ -630,13 +630,6 @@ struct amdgpu_display_manager {
>          */
>         u32 actual_brightness[AMDGPU_DM_MAX_NUM_EDP];
>
> -       /**
> -        * @restore_backlight:
> -        *
> -        * Flag to indicate whether to restore backlight after modeset.
> -        */
> -       bool restore_backlight;
> -
>         /**
>          * @aux_hpd_discon_quirk:
>          *
> --
> 2.51.0
>

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From: Jason Xing <[email-masked]>
Date: Thu, 9 Oct 2025 22:02:23 +0800
Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
To: Alexander Lobakin <[email-masked]>
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	Maciej Fijalkowski <[email-masked]>, Stanislav Fomichev <[email-masked]>, 
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On Thu, Oct 9, 2025 at 12:59=E2=80=AFAM Alexander Lobakin
<[email-masked]> wrote:
>
> Turned out certain clearly invalid values passed in &xdp_desc from
> userspace can pass xp_{,un}aligned_validate_desc() and then lead
> to UBs or just invalid frames to be queued for xmit.
>
> desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
> can cause positive integer overflow and wraparound, the same way low
> enough desc->addr with a non-zero pool->tx_metadata_len can cause
> negative integer overflow. Both scenarios can then pass the
> validation successfully.
> This doesn't happen with valid XSk applications, but can be used
> to perform attacks.
>
> Always promote desc->len to ``u64`` first to exclude positive
> overflows of it. Use explicit check_{add,sub}_overflow() when
> validating desc->addr (which is ``u64`` already).
>
> bloat-o-meter reports a little growth of the code size:
>
> add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
> Function                                     old     new   delta
> xskq_cons_peek_desc                          299     330     +31
> xsk_tx_peek_release_desc_batch               973    1002     +29
> xsk_generic_xmit                            3148    3132     -16
>
> but hopefully this doesn't hurt the performance much.

I don't see an evident point that might affect the performance. Since
you said that, I tested by running './xdpsock -i eth1 -t -S -s 64' and
didn't spot any degradation.

>
> Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
> Cc: [email-masked] # 6.8+
> Signed-off-by: Alexander Lobakin <[email-masked]>

Thanks for the fix!

Reviewed-by: Jason Xing <[email-masked]>

> ---
>  net/xdp/xsk_queue.h | 45 +++++++++++++++++++++++++++++++++++----------
>  1 file changed, 35 insertions(+), 10 deletions(-)
>
> diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
> index f16f390370dc..1eb8d9f8b104 100644
> --- a/net/xdp/xsk_queue.h
> +++ b/net/xdp/xsk_queue.h
> @@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 option=
s)
>  static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>                                             struct xdp_desc *desc)
>  {
> -       u64 addr =3D desc->addr - pool->tx_metadata_len;
> -       u64 len =3D desc->len + pool->tx_metadata_len;
> -       u64 offset =3D addr & (pool->chunk_size - 1);
> +       u64 len =3D desc->len;
> +       u64 addr, offset;
>
> -       if (!desc->len)
> +       if (!len)
>                 return false;
>
> -       if (offset + len > pool->chunk_size)
> +       /* Can overflow if desc->addr < pool->tx_metadata_len */
> +       if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
> +               return false;
> +
> +       offset =3D addr & (pool->chunk_size - 1);
> +
> +       /*
> +        * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
> +        * (pool->chunk_size is ``u32``), @len is guaranteed
> +        * to be <=3D ``U32_MAX``.
> +        */
> +       if (offset + len + pool->tx_metadata_len > pool->chunk_size)
>                 return false;
>
>         if (addr >=3D pool->addrs_cnt)
> @@ -158,27 +168,42 @@ static inline bool xp_aligned_validate_desc(struct =
xsk_buff_pool *pool,
>
>         if (xp_unused_options_set(desc->options))
>                 return false;
> +

nit?

>         return true;
>  }
>
>  static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool=
,
>                                               struct xdp_desc *desc)
>  {
> -       u64 addr =3D xp_unaligned_add_offset_to_addr(desc->addr) - pool->=
tx_metadata_len;
> -       u64 len =3D desc->len + pool->tx_metadata_len;
> +       u64 len =3D desc->len;
> +       u64 addr, end;
>
> -       if (!desc->len)
> +       if (!len)
>                 return false;
>
> +       /* Can't overflow: @len is guaranteed to be <=3D ``U32_MAX`` */
> +       len +=3D pool->tx_metadata_len;
>         if (len > pool->chunk_size)
>                 return false;
>
> -       if (addr >=3D pool->addrs_cnt || addr + len > pool->addrs_cnt ||
> -           xp_desc_crosses_non_contig_pg(pool, addr, len))
> +       /* Can overflow if desc->addr is close to 0 */
> +       if (check_sub_overflow(xp_unaligned_add_offset_to_addr(desc->addr=
),
> +                              pool->tx_metadata_len, &addr))
> +               return false;
> +
> +       if (addr >=3D pool->addrs_cnt)
> +               return false;
> +
> +       /* Can overflow if pool->addrs_cnt is high enough */
> +       if (check_add_overflow(addr, len, &end) || end > pool->addrs_cnt)
> +               return false;
> +
> +       if (xp_desc_crosses_non_contig_pg(pool, addr, len))
>                 return false;
>
>         if (xp_unused_options_set(desc->options))
>                 return false;
> +
>         return true;
>  }
>
> --
> 2.51.0
>
>

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To: Greg Kroah-Hartman <[email-masked]>
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Subject: Re: [PATCH 6.12 00/10] 6.12.51-rc1 review
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--8dWd9aYyb2y9MZlB
Content-Type: text/plain; charset=us-ascii
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Hi!

> This is the start of the stable review cycle for the 6.12.51 release.
> There are 10 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.12.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--8dWd9aYyb2y9MZlB
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--8dWd9aYyb2y9MZlB--

From - Fri Oct 17 14:26:24 2025
Delivery-date: Thu, 09 Oct 2025 14:28:20 +0000
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Date: Thu, 9 Oct 2025 16:27:50 +0200
From: Maciej Fijalkowski <[email-masked]>
To: Alexander Lobakin <[email-masked]>
CC: Magnus Karlsson <[email-masked]>, Stanislav Fomichev
	<[email-masked]>, Alexei Starovoitov <[email-masked]>, Daniel Borkmann
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	<[email-masked]>, <[email-masked]>,
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Subject: Re: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
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On Wed, Oct 08, 2025 at 06:56:59PM +0200, Alexander Lobakin wrote:
> Turned out certain clearly invalid values passed in &xdp_desc from
> userspace can pass xp_{,un}aligned_validate_desc() and then lead
> to UBs or just invalid frames to be queued for xmit.
> 
> desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
> can cause positive integer overflow and wraparound, the same way low
> enough desc->addr with a non-zero pool->tx_metadata_len can cause
> negative integer overflow. Both scenarios can then pass the
> validation successfully.

Hmm, when underflow happens the addr would be enormous, passing
existing validation would really be rare. However let us fix it while at
it.

> This doesn't happen with valid XSk applications, but can be used
> to perform attacks.
> 
> Always promote desc->len to ``u64`` first to exclude positive
> overflows of it. Use explicit check_{add,sub}_overflow() when
> validating desc->addr (which is ``u64`` already).
> 
> bloat-o-meter reports a little growth of the code size:
> 
> add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
> Function                                     old     new   delta
> xskq_cons_peek_desc                          299     330     +31
> xsk_tx_peek_release_desc_batch               973    1002     +29
> xsk_generic_xmit                            3148    3132     -16
> 
> but hopefully this doesn't hurt the performance much.

Let us be fully transparent and link the previous discussion here?

I was commenting that breaking up single statement to multiple branches
might affect subtly performance as this code is executed per each
descriptor. Jason tested copy+aligned mode, let us see if zc+unaligned
mode is affected.

<rant>
I am also thinking about test side, but xsk tx metadata came with a
separate test (xdp_hw_metadata), which was rather about testing positive
cases. That is probably a separate discussion, but metadata negative
tests should appear somewhere, I suppose xskxceiver would be a good fit,
but then, should we merge the existing logic from xdp_hw_metadata?
</rant>

> 
> Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
> Cc: [email-masked] # 6.8+
> Signed-off-by: Alexander Lobakin <[email-masked]>
> ---
>  net/xdp/xsk_queue.h | 45 +++++++++++++++++++++++++++++++++++----------
>  1 file changed, 35 insertions(+), 10 deletions(-)
> 
> diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
> index f16f390370dc..1eb8d9f8b104 100644
> --- a/net/xdp/xsk_queue.h
> +++ b/net/xdp/xsk_queue.h
> @@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 options)
>  static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>  					    struct xdp_desc *desc)
>  {
> -	u64 addr = desc->addr - pool->tx_metadata_len;
> -	u64 len = desc->len + pool->tx_metadata_len;
> -	u64 offset = addr & (pool->chunk_size - 1);
> +	u64 len = desc->len;
> +	u64 addr, offset;
>  
> -	if (!desc->len)
> +	if (!len)

This is yet another thing being fixed here as for non-zero tx_metadata_len
we were allowing 0 length descriptors... :< overall feels like we relied
too much on contract with userspace WRT descriptor layout.

If zc perf is fine, then:
Reviewed-by: Maciej Fijalkowski <[email-masked]>

>  		return false;
>  
> -	if (offset + len > pool->chunk_size)
> +	/* Can overflow if desc->addr < pool->tx_metadata_len */
> +	if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
> +		return false;
> +
> +	offset = addr & (pool->chunk_size - 1);
> +
> +	/*
> +	 * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
> +	 * (pool->chunk_size is ``u32``), @len is guaranteed
> +	 * to be <= ``U32_MAX``.
> +	 */
> +	if (offset + len + pool->tx_metadata_len > pool->chunk_size)
>  		return false;
>  
>  	if (addr >= pool->addrs_cnt)
> @@ -158,27 +168,42 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>  
>  	if (xp_unused_options_set(desc->options))
>  		return false;
> +
>  	return true;
>  }
>  
>  static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
>  					      struct xdp_desc *desc)
>  {
> -	u64 addr = xp_unaligned_add_offset_to_addr(desc->addr) - pool->tx_metadata_len;
> -	u64 len = desc->len + pool->tx_metadata_len;
> +	u64 len = desc->len;
> +	u64 addr, end;
>  
> -	if (!desc->len)
> +	if (!len)
>  		return false;
>  
> +	/* Can't overflow: @len is guaranteed to be <= ``U32_MAX`` */
> +	len += pool->tx_metadata_len;
>  	if (len > pool->chunk_size)
>  		return false;
>  
> -	if (addr >= pool->addrs_cnt || addr + len > pool->addrs_cnt ||
> -	    xp_desc_crosses_non_contig_pg(pool, addr, len))
> +	/* Can overflow if desc->addr is close to 0 */
> +	if (check_sub_overflow(xp_unaligned_add_offset_to_addr(desc->addr),
> +			       pool->tx_metadata_len, &addr))
> +		return false;
> +
> +	if (addr >= pool->addrs_cnt)
> +		return false;
> +
> +	/* Can overflow if pool->addrs_cnt is high enough */
> +	if (check_add_overflow(addr, len, &end) || end > pool->addrs_cnt)
> +		return false;
> +
> +	if (xp_desc_crosses_non_contig_pg(pool, addr, len))
>  		return false;
>  
>  	if (xp_unused_options_set(desc->options))
>  		return false;
> +
>  	return true;
>  }
>  
> -- 
> 2.51.0
> 

From - Fri Oct 17 14:26:24 2025
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From: Lee Jones <[email-masked]>
To: Lee Jones <[email-masked]>, Johan Hovold <[email-masked]>
Cc: [email-masked], [email-masked]
Subject: Re: (subset) [PATCH] mfd: altera-sysmgr: fix device leak on sysmgr
 regmap lookup
Date: Thu, 09 Oct 2025 13:32:38 +0100
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On Thu, 25 Sep 2025 17:02:19 +0200, Johan Hovold wrote:
> Make sure to drop the reference taken to the sysmgr platform device when
> retrieving its driver data.
> 
> Note that holding a reference to a device does not prevent its driver
> data from going away.
> 
> 
> [...]

Applied, thanks!

[1/1] mfd: altera-sysmgr: fix device leak on sysmgr regmap lookup
      commit: e6ce75fac4a299805939e33f9f104829ba9ffdcc

--
Lee Jones [李琼斯]

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From: Alexey Charkov <[email-masked]>
Date: Thu, 09 Oct 2025 16:34:01 +0400
Subject: [PATCH] arm64: dts: rockchip: Remove non-functioning CPU OPPs from
 RK3576
To: Rob Herring <[email-masked]>, Krzysztof Kozlowski <[email-masked]>, 
 Conor Dooley <[email-masked]>, Heiko Stuebner <[email-masked]>, 
 Yifeng Zhao <[email-masked]>, 
 Finley Xiao <[email-masked]>, 
 Detlev Casanova <[email-masked]>, 
 Elaine Zhang <[email-masked]>, Liang Chen <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], 
 [email-masked], Alexey Charkov <[email-masked]>
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Drop the top-frequency OPPs from both the LITTLE and big CPU clusters on
RK3576, as neither the opensource TF-A [1] nor the recent (after v1.08)
binary BL31 images provided by Rockchip expose those.

This fixes the problem [2] when the cpufreq governor tries to jump
directly to the highest-frequency OPP, which results in a failed SCMI call
leaving the system stuck at the previous OPP before the attempted change.

[1] https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/rockchip/rk3576/scmi/rk3576_clk.c#L264-L304
[2] https://lore.kernel.org/linux-rockchip/[email-masked]/

Fixes: 57b1ce903966 ("arm64: dts: rockchip: Add rk3576 SoC base DT")
Cc: [email-masked]
Signed-off-by: Alexey Charkov <[email-masked]>
---
 arch/arm64/boot/dts/rockchip/rk3576.dtsi | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576.dtsi b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
index fc4e9e07f1cf35fb57f132c6d82c48c62bd6265d..f0c3ab00a7f3447a1dbf7874c7bf758e82e04f25 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
@@ -276,12 +276,6 @@ opp-2016000000 {
 			opp-microvolt = <900000 900000 950000>;
 			clock-latency-ns = <40000>;
 		};
-
-		opp-2208000000 {
-			opp-hz = /bits/ 64 <2208000000>;
-			opp-microvolt = <950000 950000 950000>;
-			clock-latency-ns = <40000>;
-		};
 	};
 
 	cluster1_opp_table: opp-table-cluster1 {
@@ -348,12 +342,6 @@ opp-2208000000 {
 			opp-microvolt = <925000 925000 950000>;
 			clock-latency-ns = <40000>;
 		};
-
-		opp-2304000000 {
-			opp-hz = /bits/ 64 <2304000000>;
-			opp-microvolt = <950000 950000 950000>;
-			clock-latency-ns = <40000>;
-		};
 	};
 
 	gpu_opp_table: opp-table-gpu {

---
base-commit: ec714e371f22f716a04e6ecb2a24988c92b26911
change-id: 20251009-rk3576_opp-7bafcadef820

Best regards,
-- 
Alexey Charkov <[email-masked]>

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From: Jeongjun Park <[email-masked]>
Date: Thu, 9 Oct 2025 21:42:04 +0900
Subject: Re: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio:
 Kill timer properly at removal
To: Greg KH <[email-masked]>
Cc: [email-masked], Takashi Iwai <[email-masked]>, 
	[email-masked], 
	Clemens Ladisch <[email-masked]>, Jaroslav Kysela <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
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Hi Greg,

Greg KH <[email-masked]> wrote:
>
> On Thu, Oct 09, 2025 at 08:23:42PM +0900, Jeongjun Park wrote:
> > Hi Greg,
> >
> > Greg KH <[email-masked]> wrote:
> > >
> > > On Wed, Oct 08, 2025 at 12:58:08AM +0900, Jeongjun Park wrote:
> > > > From: Takashi Iwai <[email-masked]>
> > > >
> > > > [ Upstream commit 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 ]
> > > >
> > > > The USB-audio MIDI code initializes the timer, but in a rare case, the
> > > > driver might be freed without the disconnect call.  This leaves the
> > > > timer in an active state while the assigned object is released via
> > > > snd_usbmidi_free(), which ends up with a kernel warning when the debug
> > > > configuration is enabled, as spotted by fuzzer.
> > > >
> > > > For avoiding the problem, put timer_shutdown_sync() at
> > > > snd_usbmidi_free(), so that the timer can be killed properly.
> > > > While we're at it, replace the existing timer_delete_sync() at the
> > > > disconnect callback with timer_shutdown_sync(), too.
> > > >
> > > > Reported-by: [email-masked]
> > > > Closes: https://lore.kernel.org/[email-masked]
> > > > Cc: <[email-masked]>
> > > > Link: https://patch.msgid.link/[email-masked]
> > > > Signed-off-by: Takashi Iwai <[email-masked]>
> > > > [ del_timer vs timer_delete differences ]
> > > > Signed-off-by: Jeongjun Park <[email-masked]>
> > > > ---
> > > >  sound/usb/midi.c | 3 ++-
> > > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/sound/usb/midi.c b/sound/usb/midi.c
> > > > index a792ada18863..c3de2b137435 100644
> > > > --- a/sound/usb/midi.c
> > > > +++ b/sound/usb/midi.c
> > > > @@ -1530,6 +1530,7 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
> > > >                       snd_usbmidi_in_endpoint_delete(ep->in);
> > > >       }
> > > >       mutex_destroy(&umidi->mutex);
> > > > +     timer_shutdown_sync(&umidi->error_timer);
> > >
> > > This function is not in older kernel versions, you did not test this
> > > build :(
> > >
> > > I've applied this to 6.6.y and newer, but for 6.1.y and older, please
> > > use the proper function.
> >
> > Sorry, I didn't realize that the timer_shutdown_sync() implementation
> > commit wasn't backported to versions prior to 6.2.
> >
> > But why wasn't this feature backported to previous versions? I understand
> > that most drivers write separate patches for pre-6.2 versions that don't
> > implement timer_shutdown_sync() to address this type of bug.
>
> Features are not backported to older kernels.  If you want this fix in
> an older kernel, then you need to either backport that feature, or fix
> up the driver to use whatever was used before that function existed.

I could write a separate patch to fix this bug, but I'm not happy that
great features like timer_shutdown_sync() haven't been backported.

So, I'll try to backport the "timers: Provide timer_shutdown[_sync]()"
patch series sometime soon.

>
> thanks,
>
> greg k-h

Regards,
Jeongjun Park

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Date: Thu, 9 Oct 2025 15:31:17 +0200
From: Greg KH <[email-masked]>
To: Vivian Wang <[email-masked]>
Cc: Albert Ou <[email-masked]>, Inochi Amaoto <[email-masked]>,
	Han Gao <[email-masked]>,
	Charlie Jenkins <[email-masked]>,
	[email-masked], [email-masked],
	Meng Zhuo <[email-masked]>, Yangyu Chen <[email-masked]>,
	Palmer Dabbelt <[email-masked]>,
	Palmer Dabbelt <[email-masked]>,
	Paul Walmsley <[email-masked]>,
	Guo Ren <[email-masked]>, Paul Walmsley <[email-masked]>,
	[email-masked], Yao Zi <[email-masked]>
Subject: Re: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
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On Thu, Oct 09, 2025 at 01:50:11PM +0800, Vivian Wang wrote:
> 
> On 10/9/25 13:00, Greg KH wrote:
> > On Thu, Oct 09, 2025 at 12:19:46PM +0800, Vivian Wang wrote:
> >> [...]
> > Ok, that makes a bit more sense, but again, why is this just showing up
> > now?  What changed to cause this to be noticed at and needed to be fixed
> > at this moment in time and not before?
> 
> As of why this came quite late in the lifetime of the 6.6.y branch, I
> believe it's a combination of two factors.
> 
> Firstly, actual Sv48-capable RISC-V hardware came fairly late. Milk-V
> Megrez (with Eswin EIC7700X), on which the Go TSAN thing ran, was
> shipped only early this year. The DC ROMA II laptop (EIC7702X) and
> Framework mainboard with the same SoC has not even shipped yet, or maybe
> only shipped to developers - I'm not so certain. Most other RISC-V
> machines only have Sv39.
> 
> Secondly, there is interest among some Chinese software vendors to ship
> Linux distros based on a 6.6.y LTS kernel. The "RISC-V Common Kernel"
> (RVCK) project [1], with support from openEuler and various HW vendors,
> maintains backports on top of a 6.6.y kernel. "RockOS" [2] is a distro
> maintained by PLCT Lab, ISCAS, for EIC770{0,2}X-based boards, and it has
> a 6.6.y kernel branch. Both have cherry-picked the mmap patches for now.
> 
> We operate with the understanding that the official stable kernel will
> not be accepting new major features and drivers, but fixes do belong in
> stable, and at least from the perspective of PLCT Lab we generally try
> to send patches instead of hoarding them. Hence, the earlier backport
> request and this backport series.
> 
> I hope this explanation is acceptable.

Thanks for the detailed explaination.  I've queued these up now.

But wow, shipping new products on a 2 year old kernel feels very risky
to me, but hey, what do I know?  :)

> PS: This 6.6 kernel thing isn't just a RISC-V thing, by the way. KylinOS
> V11 has shipped in August with a 6.6 kernel. Deepin and UOS will be
> shipping with 6.6, with UOS "25" shipping maybe late this year or early
> 2026.

That too is crazy.  They should know better.

Just to give a bit of context for this, for the latest 6.6.y release,
6.6.110, there are currently over 300 documented unfixed CVE items in
that branch.  Feels rough to be doing a new release based on that...

good luck!

greg k-h

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
	David Airlie <[email-masked]>,
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Cc: [email-masked]
Subject: [PATCH 5/6] drm/panic: Fix divide by 0 if the screen width < font width
Date: Thu,  9 Oct 2025 14:24:52 +0200
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In the unlikely case that the screen is tiny, and smaller than the
font width, it leads to a divide by 0:

draw_line_with_wrap()
chars_per_row = sb->width / font->width = 0
line_wrap.len = line->len % chars_per_row;

This will trigger a divide by 0

Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 69be9d835ccf..bc5158683b2b 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -523,7 +523,7 @@ static void draw_panic_static_kmsg(struct drm_scanout_buffer *sb)
 	struct drm_panic_line line;
 	int yoffset;
 
-	if (!font)
+	if (!font || font->width > sb->width)
 		return;
 
 	yoffset = sb->height - font->height - (sb->height % font->height) / 2;
-- 
2.51.0

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
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Subject: [PATCH 2/6] drm/panic: Fix overlap between qr code and logo
Date: Thu,  9 Oct 2025 14:24:49 +0200
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The borders of the qr code was not taken into account to check if it
overlap with the logo, leading to the logo being partially covered.

Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 23ba791c6131..179cbf21f22d 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -749,7 +749,7 @@ static int _draw_panic_static_qr_code(struct drm_scanout_buffer *sb)
 	/* Fill with the background color, and draw text on top */
 	drm_panic_fill(sb, &r_screen, bg_color);
 
-	if (!drm_rect_overlap(&r_logo, &r_msg) && !drm_rect_overlap(&r_logo, &r_qr))
+	if (!drm_rect_overlap(&r_logo, &r_msg) && !drm_rect_overlap(&r_logo, &r_qr_canvas))
 		drm_panic_logo_draw(sb, &r_logo, font, fg_color);
 
 	draw_txt_rectangle(sb, font, panic_msg, panic_msg_lines, true, &r_msg, fg_color);
-- 
2.51.0

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
	David Airlie <[email-masked]>,
	Simona Vetter <[email-masked]>,
	Jocelyn Falempe <[email-masked]>,
	Javier Martinez Canillas <[email-masked]>,
	[email-masked],
	[email-masked]
Cc: [email-masked]
Subject: [PATCH 3/6] drm/panic: Fix qr_code, ensure vmargin is positive
Date: Thu,  9 Oct 2025 14:24:50 +0200
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Depending on qr_code size and screen size, the vertical margin can
be negative, that means there is not enough room to draw the qr_code.

So abort early, to avoid a segfault by trying to draw at negative
coordinates.

Fixes: cb5164ac43d0f ("drm/panic: Add a QR code panic screen")
Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 179cbf21f22d..281bb2dabf81 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -736,7 +736,10 @@ static int _draw_panic_static_qr_code(struct drm_scanout_buffer *sb)
 	pr_debug("QR width %d and scale %d\n", qr_width, scale);
 	r_qr_canvas = DRM_RECT_INIT(0, 0, qr_canvas_width * scale, qr_canvas_width * scale);
 
-	v_margin = (sb->height - drm_rect_height(&r_qr_canvas) - drm_rect_height(&r_msg)) / 5;
+	v_margin = sb->height - drm_rect_height(&r_qr_canvas) - drm_rect_height(&r_msg);
+	if (v_margin < 0)
+		return -ENOSPC;
+	v_margin /= 5;
 
 	drm_rect_translate(&r_qr_canvas, (sb->width - r_qr_canvas.x2) / 2, 2 * v_margin);
 	r_qr = DRM_RECT_INIT(r_qr_canvas.x1 + QR_MARGIN * scale, r_qr_canvas.y1 + QR_MARGIN * scale,
-- 
2.51.0

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
	David Airlie <[email-masked]>,
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Cc: [email-masked]
Subject: [PATCH 4/6] drm/panic: Fix kmsg text drawing rectangle
Date: Thu,  9 Oct 2025 14:24:51 +0200
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The rectangle height was larger than the screen size. This has no
real impact.

Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 281bb2dabf81..69be9d835ccf 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -480,7 +480,7 @@ static int draw_line_with_wrap(struct drm_scanout_buffer *sb, const struct font_
 			       struct drm_panic_line *line, int yoffset, u32 fg_color)
 {
 	int chars_per_row = sb->width / font->width;
-	struct drm_rect r_txt = DRM_RECT_INIT(0, yoffset, sb->width, sb->height);
+	struct drm_rect r_txt = DRM_RECT_INIT(0, yoffset, sb->width, font->height);
 	struct drm_panic_line line_wrap;
 
 	if (line->len > chars_per_row) {
-- 
2.51.0

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To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
	David Airlie <[email-masked]>,
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Cc: [email-masked]
Subject: [PATCH 6/6] drm/panic: Fix 24bit pixel crossing page boundaries
Date: Thu,  9 Oct 2025 14:24:53 +0200
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When using page list framebuffer, and using RGB888 format, some
pixels can cross the page boundaries, and this case was not handled,
leading to writing 1 or 2 bytes on the next virtual address.

Add a check and a specific function to handle this case.

Fixes: c9ff2808790f0 ("drm/panic: Add support to scanout buffer as array of pages")
Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 46 +++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index bc5158683b2b..d4b6ea42db0f 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -174,6 +174,33 @@ static void drm_panic_write_pixel24(void *vaddr, unsigned int offset, u32 color)
 	*p = color & 0xff;
 }
 
+/*
+ * Special case if the pixel crosses page boundaries
+ */
+static void drm_panic_write_pixel24_xpage(void *vaddr, struct page *next_page,
+					  unsigned int offset, u32 color)
+{
+	u8 *vaddr2;
+	u8 *p = vaddr + offset;
+
+	vaddr2 = kmap_local_page_try_from_panic(next_page);
+
+	*p++ = color & 0xff;
+	color >>= 8;
+
+	if (offset == PAGE_SIZE - 1)
+		p = vaddr2;
+
+	*p++ = color & 0xff;
+	color >>= 8;
+
+	if (offset == PAGE_SIZE - 2)
+		p = vaddr2;
+
+	*p = color & 0xff;
+	kunmap_local(vaddr2);
+}
+
 static void drm_panic_write_pixel32(void *vaddr, unsigned int offset, u32 color)
 {
 	u32 *p = vaddr + offset;
@@ -231,7 +258,14 @@ static void drm_panic_blit_page(struct page **pages, unsigned int dpitch,
 					page = new_page;
 					vaddr = kmap_local_page_try_from_panic(pages[page]);
 				}
-				if (vaddr)
+				if (!vaddr)
+					continue;
+
+				// Special case for 24bit, as a pixel might cross page boundaries
+				if (cpp == 3 && offset + 3 > PAGE_SIZE)
+					drm_panic_write_pixel24_xpage(vaddr, pages[page + 1],
+								      offset, fg32);
+				else
 					drm_panic_write_pixel(vaddr, offset, fg32, cpp);
 			}
 		}
@@ -321,7 +355,15 @@ static void drm_panic_fill_page(struct page **pages, unsigned int dpitch,
 				page = new_page;
 				vaddr = kmap_local_page_try_from_panic(pages[page]);
 			}
-			drm_panic_write_pixel(vaddr, offset, color, cpp);
+			if (!vaddr)
+				continue;
+
+			// Special case for 24bit, as a pixel might cross page boundaries
+			if (cpp == 3 && offset + 3 > PAGE_SIZE)
+				drm_panic_write_pixel24_xpage(vaddr, pages[page + 1],
+							      offset, color);
+			else
+				drm_panic_write_pixel(vaddr, offset, color, cpp);
 		}
 	}
 	if (vaddr)
-- 
2.51.0

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Date: Thu, 9 Oct 2025 13:43:31 +0200
Subject: Re: [PATCH] fbdev: Fix logic error in "offb" name match
To: Finn Thain <[email-masked]>, Simona Vetter <[email-masked]>,
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Am 09.10.25 um 00:56 schrieb Finn Thain:
> A regression was reported to me recently whereby /dev/fb0 had disappeared
> from a PowerBook G3 Series "Wallstreet". The problem shows up when the
> "video=ofonly" parameter is passed to the kernel, which is what the
> bootloader does when "no video driver" is selected. The cause of the
> problem is the "offb" string comparison, which got mangled when it got
> refactored. Fix it.
>
> Cc: [email-masked]
> Fixes: 93604a5ade3a ("fbdev: Handle video= parameter in video/cmdline.c")
> Reported-and-tested-by: Stan Johnson <[email-masked]>
> Signed-off-by: Finn Thain <[email-masked]>

Acked-by: Thomas Zimmermann <[email-masked]>

> ---
>   drivers/video/fbdev/core/fb_cmdline.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/video/fbdev/core/fb_cmdline.c b/drivers/video/fbdev/core/fb_cmdline.c
> index 4d1634c492ec..594b60424d1c 100644
> --- a/drivers/video/fbdev/core/fb_cmdline.c
> +++ b/drivers/video/fbdev/core/fb_cmdline.c
> @@ -40,7 +40,7 @@ int fb_get_options(const char *name, char **option)
>   	bool enabled;
>   
>   	if (name)
> -		is_of = strncmp(name, "offb", 4);
> +		is_of = !strncmp(name, "offb", 4);
>   
>   	enabled = __video_get_options(name, &options, is_of);
>   

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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Subject: [PATCH v2] Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume"
Date: Thu,  9 Oct 2025 14:19:00 +0200
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This fix regressed the original issue that commit d83c747a1225
("drm/amd/display: Fix brightness level not retained over reboot") solved,
so revert it until a different approach to solve the regression that
it caused with AMD_PRIVATE_COLOR is found.

Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
Cc: [email-masked]
Signed-off-by: Matthew Schwartz <[email-masked]>
---
v1 -> v2:
- Fix missing stable tag
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
 2 files changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 8e1622bf7a42..21281e684b84 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2081,8 +2081,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	dc_hardware_init(adev->dm.dc);
 
-	adev->dm.restore_backlight = true;
-
 	adev->dm.hpd_rx_offload_wq = hpd_rx_irq_create_workqueue(adev);
 	if (!adev->dm.hpd_rx_offload_wq) {
 		drm_err(adev_to_drm(adev), "failed to create hpd rx offload workqueue.\n");
@@ -3438,7 +3436,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
 		dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
 
 		dc_resume(dm->dc);
-		adev->dm.restore_backlight = true;
 
 		amdgpu_dm_irq_resume_early(adev);
 
@@ -9965,6 +9962,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 	bool mode_set_reset_required = false;
 	u32 i;
 	struct dc_commit_streams_params params = {dc_state->streams, dc_state->stream_count};
+	bool set_backlight_level = false;
 
 	/* Disable writeback */
 	for_each_old_connector_in_state(state, connector, old_con_state, i) {
@@ -10084,6 +10082,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 			acrtc->hw_mode = new_crtc_state->mode;
 			crtc->hwmode = new_crtc_state->mode;
 			mode_set_reset_required = true;
+			set_backlight_level = true;
 		} else if (modereset_required(new_crtc_state)) {
 			drm_dbg_atomic(dev,
 				       "Atomic commit: RESET. crtc id %d:[%p]\n",
@@ -10140,16 +10139,13 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 	 * to fix a flicker issue.
 	 * It will cause the dm->actual_brightness is not the current panel brightness
 	 * level. (the dm->brightness is the correct panel level)
-	 * So we set the backlight level with dm->brightness value after initial
-	 * set mode. Use restore_backlight flag to avoid setting backlight level
-	 * for every subsequent mode set.
+	 * So we set the backlight level with dm->brightness value after set mode
 	 */
-	if (dm->restore_backlight) {
+	if (set_backlight_level) {
 		for (i = 0; i < dm->num_of_edps; i++) {
 			if (dm->backlight_dev[i])
 				amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]);
 		}
-		dm->restore_backlight = false;
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 009f206226f0..db75e991ac7b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -630,13 +630,6 @@ struct amdgpu_display_manager {
 	 */
 	u32 actual_brightness[AMDGPU_DM_MAX_NUM_EDP];
 
-	/**
-	 * @restore_backlight:
-	 *
-	 * Flag to indicate whether to restore backlight after modeset.
-	 */
-	bool restore_backlight;
-
 	/**
 	 * @aux_hpd_discon_quirk:
 	 *
-- 
2.51.0

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
	David Airlie <[email-masked]>,
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Cc: [email-masked]
Subject: [PATCH 0/6] drm/panic: Fixes found with kunit.
Date: Thu,  9 Oct 2025 14:24:47 +0200
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A few fixes for drm panic, that I found when writing unit tests with kunit.

Jocelyn Falempe (6):
  drm/panic: Fix drawing the logo on a small narrow screen
  drm/panic: Fix overlap between qr code and logo
  drm/panic: Fix qr_code, ensure vmargin is positive
  drm/panic: Fix kmsg text drawing rectangle
  drm/panic: Fix divide by 0 if the screen width < font width
  drm/panic: Fix 24bit pixel crossing page boundaries

 drivers/gpu/drm/drm_panic.c | 60 +++++++++++++++++++++++++++++++++----
 1 file changed, 54 insertions(+), 6 deletions(-)

base-commit: e4bea919584ff292c9156cf7d641a2ab3cbe27b0
-- 
2.51.0

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From: Jocelyn Falempe <[email-masked]>
To: Maarten Lankhorst <[email-masked]>,
	Maxime Ripard <[email-masked]>,
	Thomas Zimmermann <[email-masked]>,
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Subject: [PATCH 1/6] drm/panic: Fix drawing the logo on a small narrow screen
Date: Thu,  9 Oct 2025 14:24:48 +0200
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If the logo width is bigger than the framebuffer width, and the
height is big enough to hold the logo and the message, it will draw
at x coordinate that are higher than the width, and ends up in a
corrupted image.

Fixes: 4b570ac2eb54 ("drm/rect: Add drm_rect_overlap()")
Signed-off-by: Jocelyn Falempe <[email-masked]>
---
 drivers/gpu/drm/drm_panic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 1d6312fa1429..23ba791c6131 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -429,6 +429,9 @@ static void drm_panic_logo_rect(struct drm_rect *rect, const struct font_desc *f
 static void drm_panic_logo_draw(struct drm_scanout_buffer *sb, struct drm_rect *rect,
 				const struct font_desc *font, u32 fg_color)
 {
+	if (rect->x2 > sb->width || rect->y2 > sb->height)
+		return;
+
 	if (logo_mono)
 		drm_panic_blit(sb, rect, logo_mono->data,
 			       DIV_ROUND_UP(drm_rect_width(rect), 8), 1, fg_color);
-- 
2.51.0

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Date: Thu, 9 Oct 2025 12:15:57 +0200
From: Thierry Reding <[email-masked]>
To: Johan Hovold <[email-masked]>
Cc: Joerg Roedel <[email-masked]>, Will Deacon <[email-masked]>, 
	Robin Murphy <[email-masked]>, Sven Peter <[email-masked]>, Janne Grunau <[email-masked]>, 
	Rob Clark <[email-masked]>, Marek Szyprowski <[email-masked]>, 
	Yong Wu <[email-masked]>, Matthias Brugger <[email-masked]>, 
	AngeloGioacchino Del Regno <[email-masked]>, Chen-Yu Tsai <[email-masked]>, Krishna Reddy <[email-masked]>, 
	[email-masked], [email-masked], [email-masked], 
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Subject: Re: [PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()
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--c3sygtlebt6s3awu
Content-Type: text/plain; protected-headers=v1; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
Subject: Re: [PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()
MIME-Version: 1.0

On Thu, Oct 09, 2025 at 10:27:55AM +0200, Johan Hovold wrote:
> On Thu, Oct 09, 2025 at 09:56:18AM +0200, Thierry Reding wrote:
> > On Tue, Oct 07, 2025 at 11:43:27AM +0200, Johan Hovold wrote:
>=20
> > > @@ -830,10 +830,9 @@ static struct tegra_smmu *tegra_smmu_find(struct=
 device_node *np)
> > >  		return NULL;
> > > =20
> > >  	mc =3D platform_get_drvdata(pdev);
> > > -	if (!mc) {
> > > -		put_device(&pdev->dev);
> > > +	put_device(&pdev->dev);
> > > +	if (!mc)
> > >  		return NULL;
> > > -	}
> > > =20
> > >  	return mc->smmu;
> >=20
> > pdev->dev is what's backing mc, so if we use put_device() here, then the
> > MC could go away at any time, right?
>=20
> Holding a reference to a device does not prevent its driver data from
> going away so there is no point in keeping the reference.
>=20
> But from what I can tell, you don't need to worry about that anyway
> since it's the memory controller driver that registers the iommu (and
> the driver can't be unbound).

That's true. It'd be nice to at least conceptually do the right thing
here, but not sure it's worth it. As you said, driver data going away
would need special handling and it's not even clear what that would
mean in terms of the clients...

Acked-by: Thierry Reding <[email-masked]>

--c3sygtlebt6s3awu
Content-Type: application/pgp-signature; name="signature.asc"

--c3sygtlebt6s3awu--

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 10:49:19 +0000
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Date: Thu, 9 Oct 2025 12:49:06 +0200
From: Greg KH <[email-masked]>
To: Matthew Schwartz <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] Revert "drm/amd/display: Only restore backlight after
 amdgpu_dm_init or dm_resume"
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On Thu, Oct 09, 2025 at 12:00:29PM +0200, Matthew Schwartz wrote:
> 
> > 
> > On Oct 9, 2025, at 11:51 AM, Greg KH <[email-masked]> wrote:
> > 
> > On Thu, Oct 09, 2025 at 11:23:01AM +0200, Matthew Schwartz wrote:
> >> This fix regressed the original issue that commit d83c747a1225
> >> ("drm/amd/display: Fix brightness level not retained over reboot") solved,
> >> so revert it until a different approach to solve the regression that
> >> it caused with AMD_PRIVATE_COLOR is found.
> >> 
> >> Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
> >> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
> >> Signed-off-by: Matthew Schwartz <[email-masked]>
> >> ---
> >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
> >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
> >> 2 files changed, 4 insertions(+), 15 deletions(-)
> > 
> > <formletter>
> > 
> > This is not the correct way to submit patches for inclusion in the
> > stable kernel tree.  Please read:
> >    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> > for how to do this properly.
> 
> Apologies, I was a bit confused by:
> 
> If a regression made it into a proper mainline release during the past twelve months, ensure to tag the fix with “Cc: [email-masked]”
> 
> in the regressions page, but I see now the way I did it via email cc was incorrect.
> 
> Should I resend with that fixed?

Please do.

thanks!

greg k-h

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 10:51:14 +0000
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From: Denis Arefev <[email-masked]>
To: David Rhodes <[email-masked]>
Cc: Richard Fitzgerald <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	Takashi Iwai <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH v2] ALSA: hda: Fix missing pointer check in hda_component_manager_init function
Date: Thu,  9 Oct 2025 13:50:47 +0300
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The __component_match_add function may assign the 'matchptr' pointer
the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced.

The call stack leading to the error looks like this:

hda_component_manager_init
|-> component_match_add
    |-> component_match_add_release
        |-> __component_match_add ( ... ,**matchptr, ... )
            |-> *matchptr = ERR_PTR(-ENOMEM);       // assign
|-> component_master_add_with_match( ...  match)
    |-> component_match_realloc(match, match->num); // dereference

Add IS_ERR() check to prevent the crash.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: ae7abe36e352 ("ALSA: hda/realtek: Add CS35L41 support for Thinkpad laptops")
Cc: [email-masked]
Signed-off-by: Denis Arefev <[email-masked]>
---
V1 -> V2:
Changed tag Fixes
Add print to log an error it as Stefan Binding <[email-masked]> suggested

 sound/hda/codecs/side-codecs/hda_component.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/hda/codecs/side-codecs/hda_component.c b/sound/hda/codecs/side-codecs/hda_component.c
index bcf47a301697..603a9b8ca481 100644
--- a/sound/hda/codecs/side-codecs/hda_component.c
+++ b/sound/hda/codecs/side-codecs/hda_component.c
@@ -174,6 +174,10 @@ int hda_component_manager_init(struct hda_codec *cdc,
 		sm->match_str = match_str;
 		sm->index = i;
 		component_match_add(dev, &match, hda_comp_match_dev_name, sm);
+		if (IS_ERR(match)) {
+			codec_err(cdc, "Fail to add component %ld\n", PTR_ERR(match));
+			return PTR_ERR(match);
+		}
 	}
 
 	ret = component_master_add_with_match(dev, ops, match);
-- 
2.43.0

From - Fri Oct 17 14:26:25 2025
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From: Jeongjun Park <[email-masked]>
Date: Thu, 9 Oct 2025 20:23:42 +0900
Subject: Re: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio:
 Kill timer properly at removal
To: Greg KH <[email-masked]>
Cc: [email-masked], Takashi Iwai <[email-masked]>, 
	[email-masked], 
	Clemens Ladisch <[email-masked]>, Jaroslav Kysela <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
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Hi Greg,

Greg KH <[email-masked]> wrote:
>
> On Wed, Oct 08, 2025 at 12:58:08AM +0900, Jeongjun Park wrote:
> > From: Takashi Iwai <[email-masked]>
> >
> > [ Upstream commit 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 ]
> >
> > The USB-audio MIDI code initializes the timer, but in a rare case, the
> > driver might be freed without the disconnect call.  This leaves the
> > timer in an active state while the assigned object is released via
> > snd_usbmidi_free(), which ends up with a kernel warning when the debug
> > configuration is enabled, as spotted by fuzzer.
> >
> > For avoiding the problem, put timer_shutdown_sync() at
> > snd_usbmidi_free(), so that the timer can be killed properly.
> > While we're at it, replace the existing timer_delete_sync() at the
> > disconnect callback with timer_shutdown_sync(), too.
> >
> > Reported-by: [email-masked]
> > Closes: https://lore.kernel.org/[email-masked]
> > Cc: <[email-masked]>
> > Link: https://patch.msgid.link/[email-masked]
> > Signed-off-by: Takashi Iwai <[email-masked]>
> > [ del_timer vs timer_delete differences ]
> > Signed-off-by: Jeongjun Park <[email-masked]>
> > ---
> >  sound/usb/midi.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/sound/usb/midi.c b/sound/usb/midi.c
> > index a792ada18863..c3de2b137435 100644
> > --- a/sound/usb/midi.c
> > +++ b/sound/usb/midi.c
> > @@ -1530,6 +1530,7 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
> >                       snd_usbmidi_in_endpoint_delete(ep->in);
> >       }
> >       mutex_destroy(&umidi->mutex);
> > +     timer_shutdown_sync(&umidi->error_timer);
>
> This function is not in older kernel versions, you did not test this
> build :(
>
> I've applied this to 6.6.y and newer, but for 6.1.y and older, please
> use the proper function.

Sorry, I didn't realize that the timer_shutdown_sync() implementation
commit wasn't backported to versions prior to 6.2.

But why wasn't this feature backported to previous versions? I understand
that most drivers write separate patches for pre-6.2 versions that don't
implement timer_shutdown_sync() to address this type of bug.

Is there some other, unavoidable reason I'm unaware of?

>
> thanks,
>
> greg k-h

Regards,
Jeongjun Park

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Date: Thu, 9 Oct 2025 13:26:22 +0200
From: Greg KH <[email-masked]>
To: Jeongjun Park <[email-masked]>
Cc: [email-masked], Takashi Iwai <[email-masked]>,
	[email-masked],
	Clemens Ladisch <[email-masked]>,
	Jaroslav Kysela <[email-masked]>, [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio:
 Kill timer properly at removal
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On Thu, Oct 09, 2025 at 08:23:42PM +0900, Jeongjun Park wrote:
> Hi Greg,
> 
> Greg KH <[email-masked]> wrote:
> >
> > On Wed, Oct 08, 2025 at 12:58:08AM +0900, Jeongjun Park wrote:
> > > From: Takashi Iwai <[email-masked]>
> > >
> > > [ Upstream commit 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 ]
> > >
> > > The USB-audio MIDI code initializes the timer, but in a rare case, the
> > > driver might be freed without the disconnect call.  This leaves the
> > > timer in an active state while the assigned object is released via
> > > snd_usbmidi_free(), which ends up with a kernel warning when the debug
> > > configuration is enabled, as spotted by fuzzer.
> > >
> > > For avoiding the problem, put timer_shutdown_sync() at
> > > snd_usbmidi_free(), so that the timer can be killed properly.
> > > While we're at it, replace the existing timer_delete_sync() at the
> > > disconnect callback with timer_shutdown_sync(), too.
> > >
> > > Reported-by: [email-masked]
> > > Closes: https://lore.kernel.org/[email-masked]
> > > Cc: <[email-masked]>
> > > Link: https://patch.msgid.link/[email-masked]
> > > Signed-off-by: Takashi Iwai <[email-masked]>
> > > [ del_timer vs timer_delete differences ]
> > > Signed-off-by: Jeongjun Park <[email-masked]>
> > > ---
> > >  sound/usb/midi.c | 3 ++-
> > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/sound/usb/midi.c b/sound/usb/midi.c
> > > index a792ada18863..c3de2b137435 100644
> > > --- a/sound/usb/midi.c
> > > +++ b/sound/usb/midi.c
> > > @@ -1530,6 +1530,7 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
> > >                       snd_usbmidi_in_endpoint_delete(ep->in);
> > >       }
> > >       mutex_destroy(&umidi->mutex);
> > > +     timer_shutdown_sync(&umidi->error_timer);
> >
> > This function is not in older kernel versions, you did not test this
> > build :(
> >
> > I've applied this to 6.6.y and newer, but for 6.1.y and older, please
> > use the proper function.
> 
> Sorry, I didn't realize that the timer_shutdown_sync() implementation
> commit wasn't backported to versions prior to 6.2.
> 
> But why wasn't this feature backported to previous versions? I understand
> that most drivers write separate patches for pre-6.2 versions that don't
> implement timer_shutdown_sync() to address this type of bug.

Features are not backported to older kernels.  If you want this fix in
an older kernel, then you need to either backport that feature, or fix
up the driver to use whatever was used before that function existed.

thanks,

greg k-h

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Date: Thu, 9 Oct 2025 10:27:55 +0200
From: Johan Hovold <[email-masked]>
To: Thierry Reding <[email-masked]>
Cc: Joerg Roedel <[email-masked]>, Will Deacon <[email-masked]>,
	Robin Murphy <[email-masked]>, Sven Peter <[email-masked]>,
	Janne Grunau <[email-masked]>,
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	[email-masked], [email-masked],
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Subject: Re: [PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()
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--KFWfMBBEp9y0HjZa
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On Thu, Oct 09, 2025 at 09:56:18AM +0200, Thierry Reding wrote:
> On Tue, Oct 07, 2025 at 11:43:27AM +0200, Johan Hovold wrote:

> > @@ -830,10 +830,9 @@ static struct tegra_smmu *tegra_smmu_find(struct d=
evice_node *np)
> >  		return NULL;
> > =20
> >  	mc =3D platform_get_drvdata(pdev);
> > -	if (!mc) {
> > -		put_device(&pdev->dev);
> > +	put_device(&pdev->dev);
> > +	if (!mc)
> >  		return NULL;
> > -	}
> > =20
> >  	return mc->smmu;
>=20
> pdev->dev is what's backing mc, so if we use put_device() here, then the
> MC could go away at any time, right?

Holding a reference to a device does not prevent its driver data from
going away so there is no point in keeping the reference.

But from what I can tell, you don't need to worry about that anyway
since it's the memory controller driver that registers the iommu (and
the driver can't be unbound).

Johan

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Date: Thu, 9 Oct 2025 09:32:17 +0100
From: Simon Horman <[email-masked]>
To: Bhanu Seshu Kumar Valluri <[email-masked]>
Cc: Thangaraj Samynathan <[email-masked]>,
	Rengarajan Sundararajan <[email-masked]>,
	[email-masked], Andrew Lunn <[email-masked]>,
	"David S . Miller" <[email-masked]>,
	Eric Dumazet <[email-masked]>,
	Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>,
	Oleksij Rempel <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] net: usb: lan78xx: Fix lost EEPROM write timeout
 error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
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On Thu, Oct 09, 2025 at 11:00:09AM +0530, Bhanu Seshu Kumar Valluri wrote:
> The function lan78xx_write_raw_eeprom failed to properly propagate EEPROM
> write timeout errors (-ETIMEDOUT). In the timeout  fallthrough path, it first
> attempted to restore the pin configuration for LED outputs and then
> returned only the status of that restore operation, discarding the
> original timeout error saved in ret.
> 
> As a result, callers could mistakenly treat EEPROM write operation as
> successful even though the EEPROM write had actually timed out with no
> or partial data write.
> 
> To fix this, handle errors in restoring the LED pin configuration separately.
> If the restore succeeds, return any prior EEPROM write timeout error saved
> in ret to the caller.
> 
> Suggested-by: Oleksij Rempel <[email-masked]>
> Fixes: 8b1b2ca83b20 ("net: usb: lan78xx: Improve error handling in EEPROM and OTP operations")
> cc: [email-masked]
> Signed-off-by: Bhanu Seshu Kumar Valluri <[email-masked]>
> ---
>  Note:
>  The patch is compiled and tested using EVB-LAN7800LC.
>  The patch was suggested by Oleksij Rempel while reviewing a fix to a bug
>  found by syzbot earlier.
>  The review mail chain where this fix was suggested is given below.
>  https://lore.kernel.org/all/[email-masked]/
> 
>  ChangeLog:
>  v1->v2:
>   Added cc:stable tag as asked during v1 review.
>   V1 Link : https://lore.kernel.org/all/[email-masked]/

Thanks,

This patch seems consistent with the discussion at the link under Note.
I believe it addresses the review of v1.
And that the Fixes tag corresponds to the commit that introduced this problem.

Reviewed-by: Simon Horman <[email-masked]>

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Subject: [PATCH] Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume"
Date: Thu,  9 Oct 2025 11:23:01 +0200
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This fix regressed the original issue that commit d83c747a1225
("drm/amd/display: Fix brightness level not retained over reboot") solved,
so revert it until a different approach to solve the regression that
it caused with AMD_PRIVATE_COLOR is found.

Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
Signed-off-by: Matthew Schwartz <[email-masked]>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
 2 files changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 8e1622bf7a42..21281e684b84 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2081,8 +2081,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	dc_hardware_init(adev->dm.dc);
 
-	adev->dm.restore_backlight = true;
-
 	adev->dm.hpd_rx_offload_wq = hpd_rx_irq_create_workqueue(adev);
 	if (!adev->dm.hpd_rx_offload_wq) {
 		drm_err(adev_to_drm(adev), "failed to create hpd rx offload workqueue.\n");
@@ -3438,7 +3436,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
 		dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
 
 		dc_resume(dm->dc);
-		adev->dm.restore_backlight = true;
 
 		amdgpu_dm_irq_resume_early(adev);
 
@@ -9965,6 +9962,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 	bool mode_set_reset_required = false;
 	u32 i;
 	struct dc_commit_streams_params params = {dc_state->streams, dc_state->stream_count};
+	bool set_backlight_level = false;
 
 	/* Disable writeback */
 	for_each_old_connector_in_state(state, connector, old_con_state, i) {
@@ -10084,6 +10082,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 			acrtc->hw_mode = new_crtc_state->mode;
 			crtc->hwmode = new_crtc_state->mode;
 			mode_set_reset_required = true;
+			set_backlight_level = true;
 		} else if (modereset_required(new_crtc_state)) {
 			drm_dbg_atomic(dev,
 				       "Atomic commit: RESET. crtc id %d:[%p]\n",
@@ -10140,16 +10139,13 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 	 * to fix a flicker issue.
 	 * It will cause the dm->actual_brightness is not the current panel brightness
 	 * level. (the dm->brightness is the correct panel level)
-	 * So we set the backlight level with dm->brightness value after initial
-	 * set mode. Use restore_backlight flag to avoid setting backlight level
-	 * for every subsequent mode set.
+	 * So we set the backlight level with dm->brightness value after set mode
 	 */
-	if (dm->restore_backlight) {
+	if (set_backlight_level) {
 		for (i = 0; i < dm->num_of_edps; i++) {
 			if (dm->backlight_dev[i])
 				amdgpu_dm_backlight_set_level(dm, i, dm->brightness[i]);
 		}
-		dm->restore_backlight = false;
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 009f206226f0..db75e991ac7b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -630,13 +630,6 @@ struct amdgpu_display_manager {
 	 */
 	u32 actual_brightness[AMDGPU_DM_MAX_NUM_EDP];
 
-	/**
-	 * @restore_backlight:
-	 *
-	 * Flag to indicate whether to restore backlight after modeset.
-	 */
-	bool restore_backlight;
-
 	/**
 	 * @aux_hpd_discon_quirk:
 	 *
-- 
2.51.0

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From: Greg KH <[email-masked]>
To: Matthew Schwartz <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] Revert "drm/amd/display: Only restore backlight after
 amdgpu_dm_init or dm_resume"
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On Thu, Oct 09, 2025 at 11:23:01AM +0200, Matthew Schwartz wrote:
> This fix regressed the original issue that commit d83c747a1225
> ("drm/amd/display: Fix brightness level not retained over reboot") solved,
> so revert it until a different approach to solve the regression that
> it caused with AMD_PRIVATE_COLOR is found.
> 
> Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume")
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
> Signed-off-by: Matthew Schwartz <[email-masked]>
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
>  2 files changed, 4 insertions(+), 15 deletions(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 10:01:05 +0000
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From: Matthew Schwartz <[email-masked]>
Subject: Re: [PATCH] Revert "drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume"
Date: Thu, 9 Oct 2025 12:00:29 +0200
Cc: [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked]
To: Greg KH <[email-masked]>
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>=20
> On Oct 9, 2025, at 11:51=E2=80=AFAM, Greg KH <[email-masked]> w=
rote:
>=20
> =EF=BB=BFOn Thu, Oct 09, 2025 at 11:23:01AM +0200, Matthew Schwartz wrote:=

>> This fix regressed the original issue that commit d83c747a1225
>> ("drm/amd/display: Fix brightness level not retained over reboot") solved=
,
>> so revert it until a different approach to solve the regression that
>> it caused with AMD_PRIVATE_COLOR is found.
>>=20
>> Fixes: a490c8d77d50 ("drm/amd/display: Only restore backlight after amdgp=
u_dm_init or dm_resume")
>> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4620
>> Signed-off-by: Matthew Schwartz <[email-masked]>
>> ---
>> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 ++++--------
>> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 -------
>> 2 files changed, 4 insertions(+), 15 deletions(-)
>=20
> <formletter>
>=20
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree.  Please read:
>    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html=

> for how to do this properly.

Apologies, I was a bit confused by:

If a regression made it into a proper mainline release during the past twelv=
e months, ensure to tag the fix with =E2=80=9CCc: [email-masked]=E2=80=
=9D

in the regressions page, but I see now the way I did it via email cc was inc=
orrect.

Should I resend with that fixed?

>=20
> </formletter>

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 07:18:10 +0000
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From: Geert Uytterhoeven <[email-masked]>
Date: Thu, 9 Oct 2025 09:11:06 +0200
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers
To: Andrew Morton <[email-masked]>
Cc: Lance Yang <[email-masked]>, Eero Tamminen <[email-masked]>, 
	Kent Overstreet <[email-masked]>, [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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	[email-masked], Finn Thain <[email-masked]>, [email-masked], 
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Hi Andrew,

On Thu, 9 Oct 2025 at 06:04, Andrew Morton <[email-masked]> wrote:
> On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang <[email-masked]> wrote:
> > I think we fundamentally disagree on whether this fix for known
> > false-positive warnings is needed for -stable.
>
> Having the kernel send scary warnings to our users is really bad
> behavior.  And if we don't fix it, people will keep reporting it.

As the issue is present in v6.16 and v6.17, I think that warrants -stable.

> And removing a WARN_ON is a perfectly good way of fixing it.  The
> kernel has 19,000 WARNs, probably seven of which are useful :(

Right. And there is panic_on_warn...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email-masked]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 07:56:30 +0000
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Date: Thu, 9 Oct 2025 09:56:18 +0200
From: Thierry Reding <[email-masked]>
To: Johan Hovold <[email-masked]>
Cc: Joerg Roedel <[email-masked]>, Will Deacon <[email-masked]>, 
	Robin Murphy <[email-masked]>, Sven Peter <[email-masked]>, Janne Grunau <[email-masked]>, 
	Rob Clark <[email-masked]>, Marek Szyprowski <[email-masked]>, 
	Yong Wu <[email-masked]>, Matthias Brugger <[email-masked]>, 
	AngeloGioacchino Del Regno <[email-masked]>, Chen-Yu Tsai <[email-masked]>, Krishna Reddy <[email-masked]>, 
	[email-masked], [email-masked], [email-masked], 
	Thierry Reding <[email-masked]>, Miaoqian Lin <[email-masked]>
Subject: Re: [PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()
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--wgvpzj7uzsv4xh6z
Content-Type: text/plain; protected-headers=v1; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
Subject: Re: [PATCH v2 14/14] iommu/tegra: fix device leak on probe_device()
MIME-Version: 1.0

On Tue, Oct 07, 2025 at 11:43:27AM +0200, Johan Hovold wrote:
> Make sure to drop the reference taken to the iommu platform device when
> looking up its driver data during probe_device().
>=20
> Note that commit 9826e393e4a8 ("iommu/tegra-smmu: Fix missing
> put_device() call in tegra_smmu_find") fixed the leak in an error path,
> but the reference is still leaking on success.
>=20
> Fixes: 891846516317 ("memory: Add NVIDIA Tegra memory controller support")
> Cc: [email-masked]	# 3.19: 9826e393e4a8
> Cc: Thierry Reding <[email-masked]>
> Cc: Miaoqian Lin <[email-masked]>
> Acked-by: Robin Murphy <[email-masked]>
> Signed-off-by: Johan Hovold <[email-masked]>
> ---
>  drivers/iommu/tegra-smmu.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>=20
> diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
> index 36cdd5fbab07..f6f26a072820 100644
> --- a/drivers/iommu/tegra-smmu.c
> +++ b/drivers/iommu/tegra-smmu.c
> @@ -830,10 +830,9 @@ static struct tegra_smmu *tegra_smmu_find(struct dev=
ice_node *np)
>  		return NULL;
> =20
>  	mc =3D platform_get_drvdata(pdev);
> -	if (!mc) {
> -		put_device(&pdev->dev);
> +	put_device(&pdev->dev);
> +	if (!mc)
>  		return NULL;
> -	}
> =20
>  	return mc->smmu;

pdev->dev is what's backing mc, so if we use put_device() here, then the
MC could go away at any time, right?

So the goal here was to make sure that the MC stays around during the
entire lifetime of the IOMMU attachment. We don't currently release that
reference, ever, so there is a leak, but wouldn't it be more appropriate
to release it in a .release_device implementation?

Thierry

--wgvpzj7uzsv4xh6z
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Date: Thu, 9 Oct 2025 10:02:42 +0200
Subject: Re: [PATCH] net: usb: lan78xx: Fix lost EEPROM write timeout
 error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
To: Bhanu Seshu Kumar Valluri <[email-masked]>,
 Thangaraj Samynathan <[email-masked]>,
 Rengarajan Sundararajan <[email-masked]>,
 [email-masked], Andrew Lunn <[email-masked]>,
 "David S . Miller" <[email-masked]>, Eric Dumazet
 <[email-masked]>, Jakub Kicinski <[email-masked]>,
 Oleksij Rempel <[email-masked]>
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked]
From: Paolo Abeni <[email-masked]>
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Hello,

On 10/9/25 7:41 AM, Bhanu Seshu Kumar Valluri wrote:
> On 09/10/25 11:00, Bhanu Seshu Kumar Valluri wrote:
>> The function lan78xx_write_raw_eeprom failed to properly propagate EEPROM
>> write timeout errors (-ETIMEDOUT). In the timeout  fallthrough path, it first
>> attempted to restore the pin configuration for LED outputs and then
>> returned only the status of that restore operation, discarding the
>> original timeout error saved in ret.
>>
>> As a result, callers could mistakenly treat EEPROM write operation as
>> successful even though the EEPROM write had actually timed out with no
>> or partial data write.
>>
>> To fix this, handle errors in restoring the LED pin configuration separately.
>> If the restore succeeds, return any prior EEPROM write timeout error saved
>> in ret to the caller.
>>
>> Suggested-by: Oleksij Rempel <[email-masked]>
>> Fixes: 8b1b2ca83b20 ("net: usb: lan78xx: Improve error handling in EEPROM and OTP operations")
>> cc: [email-masked]
>> Signed-off-by: Bhanu Seshu Kumar Valluri <[email-masked]>
>> ---
>>  Note:
>>  The patch is compiled and tested using EVB-LAN7800LC.
>>  The patch was suggested by Oleksij Rempel while reviewing a fix to a bug
>>  found by syzbot earlier.
>>  The review mail chain where this fix was suggested is given below.
>>  https://lore.kernel.org/all/[email-masked]/
>>
>>  ChangeLog:
>>  v1->v2:
>>   Added cc:stable tag as asked during v1 review.
>>   V1 Link : https://lore.kernel.org/all/[email-masked]/
>>
>>  drivers/net/usb/lan78xx.c | 11 +++++++----
>>  1 file changed, 7 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
>> index d75502ebbc0d..5ccbe6ae2ebe 100644
>> --- a/drivers/net/usb/lan78xx.c
>> +++ b/drivers/net/usb/lan78xx.c
>> @@ -1174,10 +1174,13 @@ static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset,
>>  	}
>>  
>>  write_raw_eeprom_done:
>> -	if (dev->chipid == ID_REV_CHIP_ID_7800_)
>> -		return lan78xx_write_reg(dev, HW_CFG, saved);
>> -
>> -	return 0;
>> +	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
>> +		int rc = lan78xx_write_reg(dev, HW_CFG, saved);
>> +		/* If USB fails, there is nothing to do */
>> +		if (rc < 0)
>> +			return rc;
>> +	}
>> +	return ret;
>>  }
>>  
>>  static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset,
> 
> Hi,
> 
> The subject prefix must be [PATCH v2] instead. I overlooked it. Should I resend it?

This is not a review, and given the current amount of queued patches a
real one will not follow soon, but please do not send a new version just
for this.

Thanks,

Paolo

From - Fri Oct 17 14:26:25 2025
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From: Bhanu Seshu Kumar Valluri <[email-masked]>
To: Thangaraj Samynathan <[email-masked]>,
	Rengarajan Sundararajan <[email-masked]>,
	[email-masked],
	Andrew Lunn <[email-masked]>,
	"David S . Miller" <[email-masked]>,
	Eric Dumazet <[email-masked]>,
	Jakub Kicinski <[email-masked]>,
	Paolo Abeni <[email-masked]>,
	Oleksij Rempel <[email-masked]>
Cc: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
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	[email-masked]
Subject: [PATCH] net: usb: lan78xx: Fix lost EEPROM write timeout error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
Date: Thu,  9 Oct 2025 11:00:09 +0530
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The function lan78xx_write_raw_eeprom failed to properly propagate EEPROM
write timeout errors (-ETIMEDOUT). In the timeout  fallthrough path, it first
attempted to restore the pin configuration for LED outputs and then
returned only the status of that restore operation, discarding the
original timeout error saved in ret.

As a result, callers could mistakenly treat EEPROM write operation as
successful even though the EEPROM write had actually timed out with no
or partial data write.

To fix this, handle errors in restoring the LED pin configuration separately.
If the restore succeeds, return any prior EEPROM write timeout error saved
in ret to the caller.

Suggested-by: Oleksij Rempel <[email-masked]>
Fixes: 8b1b2ca83b20 ("net: usb: lan78xx: Improve error handling in EEPROM and OTP operations")
cc: [email-masked]
Signed-off-by: Bhanu Seshu Kumar Valluri <[email-masked]>
---
 Note:
 The patch is compiled and tested using EVB-LAN7800LC.
 The patch was suggested by Oleksij Rempel while reviewing a fix to a bug
 found by syzbot earlier.
 The review mail chain where this fix was suggested is given below.
 https://lore.kernel.org/all/[email-masked]/

 ChangeLog:
 v1->v2:
  Added cc:stable tag as asked during v1 review.
  V1 Link : https://lore.kernel.org/all/[email-masked]/

 drivers/net/usb/lan78xx.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index d75502ebbc0d..5ccbe6ae2ebe 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -1174,10 +1174,13 @@ static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset,
 	}
 
 write_raw_eeprom_done:
-	if (dev->chipid == ID_REV_CHIP_ID_7800_)
-		return lan78xx_write_reg(dev, HW_CFG, saved);
-
-	return 0;
+	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
+		int rc = lan78xx_write_reg(dev, HW_CFG, saved);
+		/* If USB fails, there is nothing to do */
+		if (rc < 0)
+			return rc;
+	}
+	return ret;
 }
 
 static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset,
-- 
2.34.1

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 05:41:23 +0000
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Date: Thu, 9 Oct 2025 11:11:08 +0530
Subject: Re: [PATCH] net: usb: lan78xx: Fix lost EEPROM write timeout
 error(-ETIMEDOUT) in lan78xx_write_raw_eeprom
To: Thangaraj Samynathan <[email-masked]>,
 Rengarajan Sundararajan <[email-masked]>,
 [email-masked], Andrew Lunn <[email-masked]>,
 "David S . Miller" <[email-masked]>, Eric Dumazet
 <[email-masked]>, Jakub Kicinski <[email-masked]>,
 Paolo Abeni <[email-masked]>, Oleksij Rempel <[email-masked]>
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked]
From: Bhanu Seshu Kumar Valluri <[email-masked]>
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On 09/10/25 11:00, Bhanu Seshu Kumar Valluri wrote:
> The function lan78xx_write_raw_eeprom failed to properly propagate EEPROM
> write timeout errors (-ETIMEDOUT). In the timeout  fallthrough path, it first
> attempted to restore the pin configuration for LED outputs and then
> returned only the status of that restore operation, discarding the
> original timeout error saved in ret.
> 
> As a result, callers could mistakenly treat EEPROM write operation as
> successful even though the EEPROM write had actually timed out with no
> or partial data write.
> 
> To fix this, handle errors in restoring the LED pin configuration separately.
> If the restore succeeds, return any prior EEPROM write timeout error saved
> in ret to the caller.
> 
> Suggested-by: Oleksij Rempel <[email-masked]>
> Fixes: 8b1b2ca83b20 ("net: usb: lan78xx: Improve error handling in EEPROM and OTP operations")
> cc: [email-masked]
> Signed-off-by: Bhanu Seshu Kumar Valluri <[email-masked]>
> ---
>  Note:
>  The patch is compiled and tested using EVB-LAN7800LC.
>  The patch was suggested by Oleksij Rempel while reviewing a fix to a bug
>  found by syzbot earlier.
>  The review mail chain where this fix was suggested is given below.
>  https://lore.kernel.org/all/[email-masked]/
> 
>  ChangeLog:
>  v1->v2:
>   Added cc:stable tag as asked during v1 review.
>   V1 Link : https://lore.kernel.org/all/[email-masked]/
> 
>  drivers/net/usb/lan78xx.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
> index d75502ebbc0d..5ccbe6ae2ebe 100644
> --- a/drivers/net/usb/lan78xx.c
> +++ b/drivers/net/usb/lan78xx.c
> @@ -1174,10 +1174,13 @@ static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset,
>  	}
>  
>  write_raw_eeprom_done:
> -	if (dev->chipid == ID_REV_CHIP_ID_7800_)
> -		return lan78xx_write_reg(dev, HW_CFG, saved);
> -
> -	return 0;
> +	if (dev->chipid == ID_REV_CHIP_ID_7800_) {
> +		int rc = lan78xx_write_reg(dev, HW_CFG, saved);
> +		/* If USB fails, there is nothing to do */
> +		if (rc < 0)
> +			return rc;
> +	}
> +	return ret;
>  }
>  
>  static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset,

Hi,

The subject prefix must be [PATCH v2] instead. I overlooked it. Should I resend it?

Regards,
Bhanu Seshu Kumar Valluri

From - Fri Oct 17 14:26:25 2025
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Date: Thu, 9 Oct 2025 13:50:11 +0800
Subject: Re: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
To: Greg KH <[email-masked]>
Cc: Albert Ou <[email-masked]>, Inochi Amaoto <[email-masked]>,
 Han Gao <[email-masked]>, Charlie Jenkins <[email-masked]>,
 [email-masked], [email-masked],
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 Yao Zi <[email-masked]>
From: Vivian Wang <[email-masked]>
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On 10/9/25 13:00, Greg KH wrote:
> On Thu, Oct 09, 2025 at 12:19:46PM +0800, Vivian Wang wrote:
>> [...]
> Ok, that makes a bit more sense, but again, why is this just showing up
> now?  What changed to cause this to be noticed at and needed to be fixed
> at this moment in time and not before?

As of why this came quite late in the lifetime of the 6.6.y branch, I
believe it's a combination of two factors.

Firstly, actual Sv48-capable RISC-V hardware came fairly late. Milk-V
Megrez (with Eswin EIC7700X), on which the Go TSAN thing ran, was
shipped only early this year. The DC ROMA II laptop (EIC7702X) and
Framework mainboard with the same SoC has not even shipped yet, or maybe
only shipped to developers - I'm not so certain. Most other RISC-V
machines only have Sv39.

Secondly, there is interest among some Chinese software vendors to ship
Linux distros based on a 6.6.y LTS kernel. The "RISC-V Common Kernel"
(RVCK) project [1], with support from openEuler and various HW vendors,
maintains backports on top of a 6.6.y kernel. "RockOS" [2] is a distro
maintained by PLCT Lab, ISCAS, for EIC770{0,2}X-based boards, and it has
a 6.6.y kernel branch. Both have cherry-picked the mmap patches for now.

We operate with the understanding that the official stable kernel will
not be accepting new major features and drivers, but fixes do belong in
stable, and at least from the perspective of PLCT Lab we generally try
to send patches instead of hoarding them. Hence, the earlier backport
request and this backport series.

I hope this explanation is acceptable.

Thanks,
Vivian "dramforever" Wang

PS: This 6.6 kernel thing isn't just a RISC-V thing, by the way. KylinOS
V11 has shipped in August with a 6.6 kernel. Deepin and UOS will be
shipping with 6.6, with UOS "25" shipping maybe late this year or early
2026.

[1]: https://github.com/RVCK-Project/rvck
[2]: https://docs.rockos.dev/

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From: Paul Aurich <[email-masked]>

commit a9685b409a03b73d2980bbfa53eb47555802d0a9 upstream.

If open_cached_dir() encounters an error parsing the lease from the
server, the error handling may race with receiving a lease break,
resulting in open_cached_dir() freeing the cfid while the queued work is
pending.

Update open_cached_dir() to drop refs rather than directly freeing the
cfid.

Have cached_dir_lease_break(), cfids_laundromat_worker(), and
invalidate_all_cached_dirs() clear has_lease immediately while still
holding cfids->cfid_list_lock, and then use this to also simplify the
reference counting in cfids_laundromat_worker() and
invalidate_all_cached_dirs().

Fixes this KASAN splat (which manually injects an error and lease break
in open_cached_dir()):

==================================================================
BUG: KASAN: slab-use-after-free in smb2_cached_lease_break+0x27/0xb0
Read of size 8 at addr ffff88811cc24c10 by task kworker/3:1/65

CPU: 3 UID: 0 PID: 65 Comm: kworker/3:1 Not tainted 6.12.0-rc6-g255cf264e6e5-dirty #87
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
Workqueue: cifsiod smb2_cached_lease_break
Call Trace:
 <TASK>
 dump_stack_lvl+0x77/0xb0
 print_report+0xce/0x660
 kasan_report+0xd3/0x110
 smb2_cached_lease_break+0x27/0xb0
 process_one_work+0x50a/0xc50
 worker_thread+0x2ba/0x530
 kthread+0x17c/0x1c0
 ret_from_fork+0x34/0x60
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Allocated by task 2464:
 kasan_save_stack+0x33/0x60
 kasan_save_track+0x14/0x30
 __kasan_kmalloc+0xaa/0xb0
 open_cached_dir+0xa7d/0x1fb0
 smb2_query_path_info+0x43c/0x6e0
 cifs_get_fattr+0x346/0xf10
 cifs_get_inode_info+0x157/0x210
 cifs_revalidate_dentry_attr+0x2d1/0x460
 cifs_getattr+0x173/0x470
 vfs_statx_path+0x10f/0x160
 vfs_statx+0xe9/0x150
 vfs_fstatat+0x5e/0xc0
 __do_sys_newfstatat+0x91/0xf0
 do_syscall_64+0x95/0x1a0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Freed by task 2464:
 kasan_save_stack+0x33/0x60
 kasan_save_track+0x14/0x30
 kasan_save_free_info+0x3b/0x60
 __kasan_slab_free+0x51/0x70
 kfree+0x174/0x520
 open_cached_dir+0x97f/0x1fb0
 smb2_query_path_info+0x43c/0x6e0
 cifs_get_fattr+0x346/0xf10
 cifs_get_inode_info+0x157/0x210
 cifs_revalidate_dentry_attr+0x2d1/0x460
 cifs_getattr+0x173/0x470
 vfs_statx_path+0x10f/0x160
 vfs_statx+0xe9/0x150
 vfs_fstatat+0x5e/0xc0
 __do_sys_newfstatat+0x91/0xf0
 do_syscall_64+0x95/0x1a0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Last potentially related work creation:
 kasan_save_stack+0x33/0x60
 __kasan_record_aux_stack+0xad/0xc0
 insert_work+0x32/0x100
 __queue_work+0x5c9/0x870
 queue_work_on+0x82/0x90
 open_cached_dir+0x1369/0x1fb0
 smb2_query_path_info+0x43c/0x6e0
 cifs_get_fattr+0x346/0xf10
 cifs_get_inode_info+0x157/0x210
 cifs_revalidate_dentry_attr+0x2d1/0x460
 cifs_getattr+0x173/0x470
 vfs_statx_path+0x10f/0x160
 vfs_statx+0xe9/0x150
 vfs_fstatat+0x5e/0xc0
 __do_sys_newfstatat+0x91/0xf0
 do_syscall_64+0x95/0x1a0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The buggy address belongs to the object at ffff88811cc24c00
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 16 bytes inside of
 freed 1024-byte region [ffff88811cc24c00, ffff88811cc25000)

Cc: [email-masked]
Signed-off-by: Paul Aurich <[email-masked]>
Signed-off-by: Steve French <[email-masked]>
[ Do not apply the change for cfids_laundromat_worker() since there is no
  this function and related feature on 6.1.y. Update open_cached_dir()
  according to method of upstream patch. ]
Signed-off-by: Cliff Liu <[email-masked]>
Signed-off-by: He Zhe <[email-masked]>
[Shivani: Modified to apply on 6.1.y]
Signed-off-by: Shivani Agarwal <[email-masked]>
---
 fs/smb/client/cached_dir.c | 39 ++++++++++++++++----------------------
 1 file changed, 16 insertions(+), 23 deletions(-)

diff --git a/fs/smb/client/cached_dir.c b/fs/smb/client/cached_dir.c
index 3d028b6a2..23a57a0c8 100644
--- a/fs/smb/client/cached_dir.c
+++ b/fs/smb/client/cached_dir.c
@@ -320,17 +320,13 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 		/*
 		 * We are guaranteed to have two references at this point.
 		 * One for the caller and one for a potential lease.
-		 * Release the Lease-ref so that the directory will be closed
-		 * when the caller closes the cached handle.
+		 * Release one here, and the second below.
 		 */
 		kref_put(&cfid->refcount, smb2_close_cached_fid);
 	}
 	if (rc) {
-		if (cfid->is_open)
-			SMB2_close(0, cfid->tcon, cfid->fid.persistent_fid,
-				   cfid->fid.volatile_fid);
-		free_cached_dir(cfid);
-		cfid = NULL;
+		cfid->has_lease = false;
+		kref_put(&cfid->refcount, smb2_close_cached_fid);
 	}
 
 	if (rc == 0) {
@@ -462,25 +458,24 @@ void invalidate_all_cached_dirs(struct cifs_tcon *tcon)
 		cfids->num_entries--;
 		cfid->is_open = false;
 		cfid->on_list = false;
-		/* To prevent race with smb2_cached_lease_break() */
-		kref_get(&cfid->refcount);
+		if (cfid->has_lease) {
+			/*
+			 * The lease was never cancelled from the server,
+			 * so steal that reference.
+			 */
+			cfid->has_lease = false;
+		} else
+			kref_get(&cfid->refcount);
 	}
 	spin_unlock(&cfids->cfid_list_lock);
 
 	list_for_each_entry_safe(cfid, q, &entry, entry) {
 		list_del(&cfid->entry);
 		cancel_work_sync(&cfid->lease_break);
-		if (cfid->has_lease) {
-			/*
-			 * We lease was never cancelled from the server so we
-			 * need to drop the reference.
-			 */
-			spin_lock(&cfids->cfid_list_lock);
-			cfid->has_lease = false;
-			spin_unlock(&cfids->cfid_list_lock);
-			kref_put(&cfid->refcount, smb2_close_cached_fid);
-		}
-		/* Drop the extra reference opened above*/
+		/*
+		 * Drop the ref-count from above, either the lease-ref (if there
+		 * was one) or the extra one acquired.
+		 */
 		kref_put(&cfid->refcount, smb2_close_cached_fid);
 	}
 }
@@ -491,9 +486,6 @@ smb2_cached_lease_break(struct work_struct *work)
 	struct cached_fid *cfid = container_of(work,
 				struct cached_fid, lease_break);
 
-	spin_lock(&cfid->cfids->cfid_list_lock);
-	cfid->has_lease = false;
-	spin_unlock(&cfid->cfids->cfid_list_lock);
 	kref_put(&cfid->refcount, smb2_close_cached_fid);
 }
 
@@ -511,6 +503,7 @@ int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16])
 		    !memcmp(lease_key,
 			    cfid->fid.lease_key,
 			    SMB2_LEASE_KEY_SIZE)) {
+			cfid->has_lease = false;
 			cfid->time = 0;
 			/*
 			 * We found a lease remove it from the list
-- 
2.40.4

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Date: Thu, 9 Oct 2025 11:53:28 +0800
Cc: [email-masked], [email-masked]
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix wrong block mapping for
 multi-devices
To: Jaegeuk Kim <[email-masked]>, [email-masked],
 [email-masked]
From: Chao Yu <[email-masked]>
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On 10/7/2025 11:53 AM, Jaegeuk Kim via Linux-f2fs-devel wrote:
> Assuming the disk layout as below,
> 
> disk0: 0            --- 0x00035abfff
> disk1: 0x00035ac000 --- 0x00037abfff
> disk2: 0x00037ac000 --- 0x00037ebfff
> 
> and we want to read data from offset=13568 having len=128 across the block
> devices, we can illustrate the block addresses like below.
> 
> 0 .. 0x00037ac000 ------------------- 0x00037ebfff, 0x00037ec000 -------
>            |          ^            ^                                ^
>            |   fofs   0            13568                            13568+128
>            |       ------------------------------------------------------
>            |   LBA    0x37e8aa9    0x37ebfa9                        0x37ec029
>            --- map    0x3caa9      0x3ffa9
> 
> In this example, we should give the relative map of the target block device
> ranging from 0x3caa9 to 0x3ffa9 where the length should be calculated by
> 0x37ebfff + 1 - 0x37ebfa9.
> 
> In the below equation, however, map->m_pblk was supposed to be the original
> address instead of the one from the target block address.
> 
>   - map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk);
> 
> Cc: [email-masked]
> Fixes: 71f2c8206202 ("f2fs: multidevice: support direct IO")
> Signed-off-by: Jaegeuk Kim <[email-masked]>

Looks good to me, thanks for the fix!

Reviewed-by: Chao Yu <[email-masked]>

Thanks,

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Date: Wed, 8 Oct 2025 21:04:53 -0700
From: Andrew Morton <[email-masked]>
To: Lance Yang <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>, Eero Tamminen
 <[email-masked]>, Kent Overstreet <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
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 [email-masked], [email-masked],
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 [email-masked], [email-masked], [email-masked],
 [email-masked], Finn Thain <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Thu, 9 Oct 2025 10:01:18 +0800 Lance Yang <[email-masked]> wrote:

> I think we fundamentally disagree on whether this fix for known
> false-positive warnings is needed for -stable.

Having the kernel send scary warnings to our users is really bad
behavior.  And if we don't fix it, people will keep reporting it.

And removing a WARN_ON is a perfectly good way of fixing it.  The
kernel has 19,000 WARNs, probably seven of which are useful :(

From: Lance Yang <[email-masked]>
Subject: hung_task: fix warnings caused by unaligned lock pointers
Date: Tue, 9 Sep 2025 22:52:43 +0800

From: Lance Yang <[email-masked]>

The blocker tracking mechanism assumes that lock pointers are at least
4-byte aligned to use their lower bits for type encoding.

However, as reported by Eero Tamminen, some architectures like m68k
only guarantee 2-byte alignment of 32-bit values. This breaks the
assumption and causes two related WARN_ON_ONCE checks to trigger.

To fix this, the runtime checks are adjusted to silently ignore any lock
that is not 4-byte aligned, effectively disabling the feature in such
cases and avoiding the related warnings.

Thanks to Geert Uytterhoeven for bisecting!

Link: https://lkml.kernel.org/r/[email-masked]
Fixes: e711faaafbe5 ("hung_task: replace blocker_mutex with encoded blocker")
Signed-off-by: Lance Yang <[email-masked]>
Reported-by: Eero Tamminen <[email-masked]>
Closes: https://lore.kernel.org/lkml/[email-masked]
Reviewed-by: Masami Hiramatsu (Google) <[email-masked]>
Cc: John Paul Adrian Glaubitz <[email-masked]>
Cc: Anna Schumaker <[email-masked]>
Cc: Boqun Feng <[email-masked]>
Cc: Finn Thain <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>
Cc: Ingo Molnar <[email-masked]>
Cc: Joel Granados <[email-masked]>
Cc: John Stultz <[email-masked]>
Cc: Kent Overstreet <[email-masked]>
Cc: Lance Yang <[email-masked]>
Cc: Mingzhe Yang <[email-masked]>
Cc: Peter Zijlstra <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>
Cc: Steven Rostedt <[email-masked]>
Cc: Tomasz Figa <[email-masked]>
Cc: Waiman Long <[email-masked]>
Cc: Will Deacon <[email-masked]>
Cc: Yongliang Gao <[email-masked]>
Cc: <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
---

 include/linux/hung_task.h |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/include/linux/hung_task.h~hung_task-fix-warnings-caused-by-unaligned-lock-pointers
+++ a/include/linux/hung_task.h
@@ -20,6 +20,10 @@
  * always zero. So we can use these bits to encode the specific blocking
  * type.
  *
+ * Note that on architectures where this is not guaranteed, or for any
+ * unaligned lock, this tracking mechanism is silently skipped for that
+ * lock.
+ *
  * Type encoding:
  * 00 - Blocked on mutex			(BLOCKER_TYPE_MUTEX)
  * 01 - Blocked on semaphore			(BLOCKER_TYPE_SEM)
@@ -45,7 +49,7 @@ static inline void hung_task_set_blocker
 	 * If the lock pointer matches the BLOCKER_TYPE_MASK, return
 	 * without writing anything.
 	 */
-	if (WARN_ON_ONCE(lock_ptr & BLOCKER_TYPE_MASK))
+	if (lock_ptr & BLOCKER_TYPE_MASK)
 		return;
 
 	WRITE_ONCE(current->blocker, lock_ptr | type);
@@ -53,8 +57,6 @@ static inline void hung_task_set_blocker
 
 static inline void hung_task_clear_blocker(void)
 {
-	WARN_ON_ONCE(!READ_ONCE(current->blocker));
-
 	WRITE_ONCE(current->blocker, 0UL);
 }
 
_

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Date: Thu, 9 Oct 2025 12:19:46 +0800
Subject: Re: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
To: Greg KH <[email-masked]>
Cc: [email-masked], Paul Walmsley <[email-masked]>,
 Palmer Dabbelt <[email-masked]>, Albert Ou <[email-masked]>,
 Paul Walmsley <[email-masked]>, [email-masked],
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 Charlie Jenkins <[email-masked]>, Yangyu Chen <[email-masked]>,
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From: Vivian Wang <[email-masked]>
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On 10/8/25 18:20, Greg KH wrote:
> On Wed, Oct 08, 2025 at 03:50:15PM +0800, Vivian Wang wrote:
>> Backport of the two riscv mmap patches from master. In effect, these two
>> patches removes arch_get_mmap_{base,end} for riscv.
> Why is this needed?  What bug does this fix?

The behavior of mmap hint address in current 6.6.y is broken when > 39
bits of virtual address is available (i.e. Sv48 or Sv57, having 48 and
57 bits of VA available, respectively). The man-pages mmap(2) page
states, for the hint address [1]:

       If addr is NULL, then the kernel chooses the (page-aligned)
       address at which to create the mapping; this is the most portable
       method of creating a new mapping.  If addr is not NULL, then the
       kernel takes it as a hint about where to place the mapping; on
       Linux, the kernel will pick a nearby page boundary (but always
       above or equal to the value specified by
       /proc/sys/vm/mmap_min_addr) and attempt to create the mapping
       there.  If another mapping already exists there, the kernel picks
       a new address that may or may not depend on the hint.  The address
       of the new mapping is returned as the result of the call.

Therefore, if a userspace program specifies a large hint address of e.g.
1<<50, and both the kernel and the hardware supports it, it should be
used even if MAP_FIXED is not specified. This is also the behavior
implemented in x86_64, arm64, and, on a recent enough (> 6.10) kernel,
riscv64.

However, current 6.6.y for riscv64 implements a bizarre behavior, where
the hint address is treated as an upper bound instead. Therefore,
passing 1<<50 would actually return a VA in 48-bit space.

To reproduce, call mmap with arguments like:

       mmap(hint, 4096, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);

Comparison:

        hint = 0x4000000000000 i.e. 1 << 50

                    6.6.106             6.6.106 + patch
            sv48    0x7fff90223000      0x7fff93b4e000
            sv57    0x7fffb7d49000      0x4000000000000

When the hint is not used, the exact address is of course random, which
is expected. However, since the address 1<<50 is supported under Sv57,
it should be usable by mmap, but with current 6.6.y behavior it is not
used, and some other address from 48-bit space used instead.

There's not yet real riscv64 hardware with Sv57, but an analogous
problem arises on Sv48 with an address like 1<<40.

One real userspace program that runs into this is the Go programming
language runtime with TSAN enabled. Excerpt from a test log [2], which
was run on an Eswin EIC7700x, which supports Sv48:

fatal error: too many address space collisions for -race mode
runtime stack:
runtime.throw({0x257eaa?, 0x4000000?})
    /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:1246 +0x38 fp=0x7ffff84af758 sp=0x7ffff84af730 pc=0xc9310
runtime.(*mheap).sysAlloc(0x3e3c20, 0x81cc8?, 0x3f3e28, 0x3f3e50)
    /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/malloc.go:799 +0x56c fp=0x7ffff84af7f8 sp=0x7ffff84af758 pc=0x67944
runtime.(*mheap).grow(0x3e3c20, 0x7fffb69fee00?)
    /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mheap.go:1568 +0x9c fp=0x7ffff84af870 sp=0x7ffff84af7f8 pc=0x824c4
runtime.(*mheap).allocSpan(0x3e3c20, 0x1, 0x0, 0x10)
[...]
FAIL    runtime/race    0.285s

With TSAN enabled, the Go runtime allocates a lot of virtual address
space. As the message suggests, if the return value of mmap is not equal
to a non-zero hint, the runtime assumes that mmap is failing to allocate
the address because some other mapping is already there (in other words,
it assumes the man-pages documented behavior), and unmaps it and tries a
different address, until it tries too many times and gives up. This
means Go with TSAN fails to initialize on Sv48 and current 6.6.y.

(cc Meng Zhuo, in case of any questions about the Go runtime here.)

Patch 1 here addresses the above issue, but introduced regressions (see
replies in "Link"). Patch 2 addresses those regressions.

Thanks,
Vivian "dramforever" Wang

[1]: https://man7.org/linux/man-pages/man2/mmap.2.html
[2]: https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8708301310656989281/+/u/step/22/log/2

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Date: Thu, 9 Oct 2025 07:00:46 +0200
From: Greg KH <[email-masked]>
To: Vivian Wang <[email-masked]>
Cc: [email-masked], Paul Walmsley <[email-masked]>,
	Palmer Dabbelt <[email-masked]>,
	Albert Ou <[email-masked]>,
	Paul Walmsley <[email-masked]>,
	[email-masked], [email-masked],
	Guo Ren <[email-masked]>, Charlie Jenkins <[email-masked]>,
	Yangyu Chen <[email-masked]>, Han Gao <[email-masked]>,
	Icenowy Zheng <[email-masked]>, Inochi Amaoto <[email-masked]>,
	Yao Zi <[email-masked]>, Palmer Dabbelt <[email-masked]>,
	Meng Zhuo <[email-masked]>
Subject: Re: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
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On Thu, Oct 09, 2025 at 12:19:46PM +0800, Vivian Wang wrote:
> 
> On 10/8/25 18:20, Greg KH wrote:
> > On Wed, Oct 08, 2025 at 03:50:15PM +0800, Vivian Wang wrote:
> >> Backport of the two riscv mmap patches from master. In effect, these two
> >> patches removes arch_get_mmap_{base,end} for riscv.
> > Why is this needed?  What bug does this fix?
> 
> The behavior of mmap hint address in current 6.6.y is broken when > 39
> bits of virtual address is available (i.e. Sv48 or Sv57, having 48 and
> 57 bits of VA available, respectively). The man-pages mmap(2) page
> states, for the hint address [1]:
> 
> � � � �If addr is NULL, then the kernel chooses the (page-aligned)
> � � � �address at which to create the mapping; this is the most portable
> � � � �method of creating a new mapping.� If addr is not NULL, then the
> � � � �kernel takes it as a hint about where to place the mapping; on
> � � � �Linux, the kernel will pick a nearby page boundary (but always
> � � � �above or equal to the value specified by
> � � � �/proc/sys/vm/mmap_min_addr) and attempt to create the mapping
> � � � �there.� If another mapping already exists there, the kernel picks
> � � � �a new address that may or may not depend on the hint.� The address
> � � � �of the new mapping is returned as the result of the call.
> 
> Therefore, if a userspace program specifies a large hint address of e.g.
> 1<<50, and both the kernel and the hardware supports it, it should be
> used even if MAP_FIXED is not specified. This is also the behavior
> implemented in x86_64, arm64, and, on a recent enough (> 6.10) kernel,
> riscv64.
> 
> However, current 6.6.y for riscv64 implements a bizarre behavior, where
> the hint address is treated as an upper bound instead. Therefore,
> passing 1<<50 would actually return a VA in 48-bit space.
> 
> To reproduce, call mmap with arguments like:
> 
>        mmap(hint, 4096, PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
> 
> Comparison:
> 
> � � � � hint = 0x4000000000000 i.e. 1 << 50
> 
> � � � � � � � � � � 6.6.106� � � � � � �6.6.106 + patch
> � � � � � � sv48� � 0x7fff90223000� � � 0x7fff93b4e000
> � � � � � � sv57� � 0x7fffb7d49000� � � 0x4000000000000
> 
> When the hint is not used, the exact address is of course random, which
> is expected. However, since the address 1<<50 is supported under Sv57,
> it should be usable by mmap, but with current 6.6.y behavior it is not
> used, and some other address from 48-bit space used instead.
> 
> There's not yet real riscv64 hardware with Sv57, but an analogous
> problem arises on Sv48 with an address like 1<<40.

As this issue has been fixed for many years now, why is it just showing
up now?  Shouldn't you be using 6.12.y for new hardware?

> One real userspace program that runs into this is the Go programming
> language runtime with TSAN enabled. Excerpt from a test log [2], which
> was run on an Eswin EIC7700x, which supports Sv48:
> 
> fatal error: too many address space collisions for -race mode
> runtime stack:
> runtime.throw({0x257eaa?, 0x4000000?})
> � � /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:1246 +0x38 fp=0x7ffff84af758 sp=0x7ffff84af730 pc=0xc9310
> runtime.(*mheap).sysAlloc(0x3e3c20, 0x81cc8?, 0x3f3e28, 0x3f3e50)
> � � /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/malloc.go:799 +0x56c fp=0x7ffff84af7f8 sp=0x7ffff84af758 pc=0x67944
> runtime.(*mheap).grow(0x3e3c20, 0x7fffb69fee00?)
> � � /home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/mheap.go:1568 +0x9c fp=0x7ffff84af870 sp=0x7ffff84af7f8 pc=0x824c4
> runtime.(*mheap).allocSpan(0x3e3c20, 0x1, 0x0, 0x10)
> [...]
> FAIL� � runtime/race� � 0.285s
> 
> With TSAN enabled, the Go runtime allocates a lot of virtual address
> space. As the message suggests, if the return value of mmap is not equal
> to a non-zero hint, the runtime assumes that mmap is failing to allocate
> the address because some other mapping is already there (in other words,
> it assumes the man-pages documented behavior), and unmaps it and tries a
> different address, until it tries too many times and gives up. This
> means Go with TSAN fails to initialize on Sv48 and current 6.6.y.
> 
> (cc Meng Zhuo, in case of any questions about the Go runtime here.)
> 
> Patch 1 here addresses the above issue, but introduced regressions (see
> replies in "Link"). Patch 2 addresses those regressions.

Ok, that makes a bit more sense, but again, why is this just showing up
now?  What changed to cause this to be noticed at and needed to be fixed
at this moment in time and not before?

thanks,

greg k-h

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Feedback-ID: i58a146ae:Fastmail
To: Simona Vetter <[email-masked]>,
    Helge Deller <[email-masked]>,
    Thomas Zimmermann <[email-masked]>,
    Javier Martinez Canillas <[email-masked]>
Cc: [email-masked],
    [email-masked],
    [email-masked],
    [email-masked]
From: Finn Thain <[email-masked]>
Subject: [PATCH] fbdev: Fix logic error in "offb" name match
Date: Thu, 09 Oct 2025 09:56:25 +1100
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A regression was reported to me recently whereby /dev/fb0 had disappeared
from a PowerBook G3 Series "Wallstreet". The problem shows up when the
"video=ofonly" parameter is passed to the kernel, which is what the
bootloader does when "no video driver" is selected. The cause of the
problem is the "offb" string comparison, which got mangled when it got
refactored. Fix it.

Cc: [email-masked]
Fixes: 93604a5ade3a ("fbdev: Handle video= parameter in video/cmdline.c")
Reported-and-tested-by: Stan Johnson <[email-masked]>
Signed-off-by: Finn Thain <[email-masked]>
---
 drivers/video/fbdev/core/fb_cmdline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/core/fb_cmdline.c b/drivers/video/fbdev/core/fb_cmdline.c
index 4d1634c492ec..594b60424d1c 100644
--- a/drivers/video/fbdev/core/fb_cmdline.c
+++ b/drivers/video/fbdev/core/fb_cmdline.c
@@ -40,7 +40,7 @@ int fb_get_options(const char *name, char **option)
 	bool enabled;
 
 	if (name)
-		is_of = strncmp(name, "offb", 4);
+		is_of = !strncmp(name, "offb", 4);
 
 	enabled = __video_get_options(name, &options, is_of);
 
-- 
2.49.1

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Date: Thu, 9 Oct 2025 01:02:58 +0200
Subject: Re: [PATCH] fbdev: Fix logic error in "offb" name match
To: Finn Thain <[email-masked]>, Simona Vetter <[email-masked]>,
 Thomas Zimmermann <[email-masked]>,
 Javier Martinez Canillas <[email-masked]>
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SpamTally: Final spam score: 4

On 10/9/25 00:56, Finn Thain wrote:
> A regression was reported to me recently whereby /dev/fb0 had disappeare=
d
> from a PowerBook G3 Series "Wallstreet". The problem shows up when the
> "video=3Dofonly" parameter is passed to the kernel, which is what the
> bootloader does when "no video driver" is selected. The cause of the
> problem is the "offb" string comparison, which got mangled when it got
> refactored. Fix it.
>=20
> Cc: [email-masked]
> Fixes: 93604a5ade3a ("fbdev: Handle video=3D parameter in video/cmdline.=
c")
> Reported-and-tested-by: Stan Johnson <[email-masked]>
> Signed-off-by: Finn Thain <[email-masked]>
> ---
>   drivers/video/fbdev/core/fb_cmdline.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

applied.

Thanks!
Helge

From - Fri Oct 17 14:26:25 2025
Delivery-date: Thu, 09 Oct 2025 02:02:51 +0000
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Date: Thu, 9 Oct 2025 10:01:18 +0800
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
To: Andrew Morton <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>,
 Eero Tamminen <[email-masked]>,
 Kent Overstreet <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 Finn Thain <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked]
From: Lance Yang <[email-masked]>
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@Andrew, what's your call on this?

I think we fundamentally disagree on whether this fix for known
false-positive warnings is needed for -stable.

Rather than continuing this thread, let's just ask the maintainer.

Thanks,
Lance

On 2025/10/9 05:55, Finn Thain wrote:
> 
> On Wed, 8 Oct 2025, Lance Yang wrote:
> 
>> On 2025/10/8 18:12, Finn Thain wrote:
>>>
>>> On Wed, 8 Oct 2025, Lance Yang wrote:
>>>
>>>>
>>>> In other words, we are not just fixing the bug reported by Eero and
>>>> Geert, but correcting the blocker tracking mechanism's flawed
>>>> assumption for -stable ;)
>>>>
>>>> If you feel this doesn't qualify as a fix, I can change the Fixes:
>>>> tag to point to the original commit that introduced this flawed
>>>> mechanism instead.
>>>>
>>>
>>> That's really a question for the bug reporters. I don't personally
>>> have a problem with CONFIG_DETECT_HUNG_TASK_BLOCKER so I can't say
>>> whether the fix meets the requirements set in
>>> Documentation/process/stable-kernel-rules.rst. And I still don't know
>>
>> I'm a bit confused, as I recall you previously stating that "It's wrong
>> and should be fixed"[1].
>>
> 
> You took that quote out of context. Please go and read it again.
> 
>> To clarify, is your current position that it should be fixed in general,
>> but the fix should not be backported to -stable?
>>
> 
> To clarify, what do you mean by "it"? Is it the commentary discussed in
> [1]? The misalignment of atomics? The misalignment of locks? The alignment
> assumptions in your code? The WARN reported by Eero and Geert?
> 
>> If so, then I have nothing further to add to this thread and am happy to
>> let the maintainer @Andrew decide.
>>
>>> what's meant by "unnecessary warnings in a few unexpected cases".
>>
>> The blocker tracking mechanism will trigger a warning when it encounters
>> any unaligned lock pointer (e.g., from a packed struct). I don't think
>> that is the expected behavior.
> 
> Sure, no-one was expecting false positives.
> 
> I think you are conflating "misaligned" with "not 4-byte aligned". Your
> algorithm does not strictly require natural alignment, it requires 4-byte
> alignment of locks.
> 
> Regarding your concern about packed structs, please re-read this message:
> https://lore.kernel.org/all/CAMuHMdV-AtPm-W-QUC1HixJ8Koy_HdESwCCOhRs3Q26=[email-masked]/
> 
> AFAIK the problem with your code is nothing more than the usual difficulty
> encountered when porting between architectures that have different
> alignment rules for scalar variables.
> 
> Therefore, my question about the theoretical nature of the problem comes
> down to this.
> 
> Is the m68k architecture the only one producing actual false positives?
> 
> Do you know of actual instances of locks in packed structs?
> 
>> Instead, it should simply skip any unaligned pointer it cannot handle.
>> For the stable kernels, at least, this is the correct behavior.
>>
> 
> Why? Are users of the stable branch actually affected?
> 
>> [1]
>> https://lore.kernel.org/lkml/[email-masked]/
>>
>>

From - Fri Oct 17 14:26:26 2025
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Date: Wed, 8 Oct 2025 21:38:40 +0530
Subject: Re: [PATCH v1] ASoC: soc-pcm: Fix mute and unmute control for
 non-dynamic DAI links
To: Srinivas Kandagatla <[email-masked]>,
        Liam Girdwood <[email-masked]>, Mark Brown <[email-masked]>,
        Jaroslav Kysela <[email-masked]>, Takashi Iwai <[email-masked]>
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked],
        [email-masked], [email-masked]
From: Mohammad Rafi Shaik <[email-masked]>
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On 10/8/2025 7:16 PM, Srinivas Kandagatla wrote:
> 
> 
> On 10/7/25 3:33 AM, Mohammad Rafi Shaik wrote:
>> In setups where the same codec DAI is reused across multiple DAI
>> links, mute controls via `snd_soc_dai_digital_mute()` is skipped for
> 
> Please explain the problem.
> 
In Qualcomm audioreach setup, if platform dai not specified in DT, then
cpu dai using as platform and initialize as static dai-link and created
pcm device and link-dynamic == false by default.

In existing setup if dynamic==false, it's skipping trigger snd-ops and 
the codec is always on mute state.

>> non-dynamic links. The trigger operations are not invoked when
>> `dai_link->dynamic == 0`, and mute controls is currently conditioned
> 
> I dont think any of the Qualcomm upstream platforms use this flag.
> 

Yes, we are using dynamic flag and it's set to true in Qualcomm platforms.

Please check: 
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/tree/sound/soc/qcom/qdsp6/topology.c#n1093

>> only on `snd_soc_dai_mute_is_ctrled_at_trigger()`. This patch ensures
>> that mute and unmute is applied explicitly for non-dynamic links.
> How is this resolving the issue, mute on these codecs happens at trigger
> level instead of prepare.
> 
yes agree, but if link->dynamic==false the trigger ops not getting 
called, which leading to codec always on mute state.

Thanks & Regards,
Rafi.

> --srini
>>
>> Fixes: f0220575e65a ("ASoC: soc-dai: add flag to mute and unmute stream during trigger")
>> Cc: [email-masked]
>> Signed-off-by: Mohammad Rafi Shaik <[email-masked]>
>> ---
>>   sound/soc/soc-pcm.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
>> index 2c21fd528afd..4ed829b49bc2 100644
>> --- a/sound/soc/soc-pcm.c
>> +++ b/sound/soc/soc-pcm.c
>> @@ -949,7 +949,7 @@ static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
>>   			SND_SOC_DAPM_STREAM_START);
>>   
>>   	for_each_rtd_dais(rtd, i, dai) {
>> -		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
>> +		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
>>   			snd_soc_dai_digital_mute(dai, 0, substream->stream);
>>   	}
>>   
>> @@ -1007,7 +1007,7 @@ static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
>>   			soc_pcm_set_dai_params(dai, NULL);
>>   
>>   		if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
>> -			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
>> +			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
>>   				snd_soc_dai_digital_mute(dai, 1, substream->stream);
>>   		}
>>   	}
> 

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Date: Wed, 8 Oct 2025 17:12:37 +0100
Subject: Re: [PATCH v1] ASoC: soc-pcm: Fix mute and unmute control for
 non-dynamic DAI links
To: Mohammad Rafi Shaik <[email-masked]>,
 Srinivas Kandagatla <[email-masked]>, Liam Girdwood <[email-masked]>,
 Mark Brown <[email-masked]>, Jaroslav Kysela <[email-masked]>,
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Cc: [email-masked], [email-masked],
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 [email-masked], [email-masked]
From: Srinivas Kandagatla <[email-masked]>
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On 10/8/25 5:08 PM, Mohammad Rafi Shaik wrote:
> 
> 
> On 10/8/2025 7:16 PM, Srinivas Kandagatla wrote:
>>
>>
>> On 10/7/25 3:33 AM, Mohammad Rafi Shaik wrote:
>>> In setups where the same codec DAI is reused across multiple DAI
>>> links, mute controls via `snd_soc_dai_digital_mute()` is skipped for
>>
>> Please explain the problem.
>>
> In Qualcomm audioreach setup, if platform dai not specified in DT, then
> cpu dai using as platform and initialize as static dai-link and created
> pcm device and link-dynamic == false by default.
> 
> In existing setup if dynamic==false, it's skipping trigger snd-ops and
> the codec is always on mute state.
> 
>>> non-dynamic links. The trigger operations are not invoked when
>>> `dai_link->dynamic == 0`, and mute controls is currently conditioned
>>
>> I dont think any of the Qualcomm upstream platforms use this flag.
>>
> 
> Yes, we are using dynamic flag and it's set to true in Qualcomm platforms.
> 
> Please check: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/
> sound.git/tree/sound/soc/qcom/qdsp6/topology.c#n1093
> 
>>> only on `snd_soc_dai_mute_is_ctrled_at_trigger()`. This patch ensures
>>> that mute and unmute is applied explicitly for non-dynamic links.
>> How is this resolving the issue, mute on these codecs happens at trigger
>> level instead of prepare.
>>
> yes agree, but if link->dynamic==false the trigger ops not getting
> called, which leading to codec always on mute state.

This is because you are using something very different solution to what
ASoC kernel provides.

I dont think this is a problem with as long as you use kernel ABI..

This patch looks totally a hack from something that does not belong to
kernel, so is  NAK  from my side on this.

--srini

> 
> Thanks & Regards,
> Rafi.
> 
>> --srini
>>>
>>> Fixes: f0220575e65a ("ASoC: soc-dai: add flag to mute and unmute
>>> stream during trigger")
>>> Cc: [email-masked]
>>> Signed-off-by: Mohammad Rafi Shaik
>>> <[email-masked]>
>>> ---
>>>   sound/soc/soc-pcm.c | 4 ++--
>>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
>>> index 2c21fd528afd..4ed829b49bc2 100644
>>> --- a/sound/soc/soc-pcm.c
>>> +++ b/sound/soc/soc-pcm.c
>>> @@ -949,7 +949,7 @@ static int __soc_pcm_prepare(struct
>>> snd_soc_pcm_runtime *rtd,
>>>               SND_SOC_DAPM_STREAM_START);
>>>         for_each_rtd_dais(rtd, i, dai) {
>>> -        if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
>>> +        if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd-
>>> >dai_link->dynamic)
>>>               snd_soc_dai_digital_mute(dai, 0, substream->stream);
>>>       }
>>>   @@ -1007,7 +1007,7 @@ static int soc_pcm_hw_clean(struct
>>> snd_soc_pcm_runtime *rtd,
>>>               soc_pcm_set_dai_params(dai, NULL);
>>>             if (snd_soc_dai_stream_active(dai, substream->stream) ==
>>> 1) {
>>> -            if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
>>> +            if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd-
>>> >dai_link->dynamic)
>>>                   snd_soc_dai_digital_mute(dai, 1, substream->stream);
>>>           }
>>>       }
>>
> 

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From: Alexander Lobakin <[email-masked]>
To: Magnus Karlsson <[email-masked]>,
	Maciej Fijalkowski <[email-masked]>
Cc: Alexander Lobakin <[email-masked]>,
	Stanislav Fomichev <[email-masked]>,
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Subject: [PATCH bpf] xsk: harden userspace-supplied &xdp_desc validation
Date: Wed,  8 Oct 2025 18:56:59 +0200
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Turned out certain clearly invalid values passed in &xdp_desc from
userspace can pass xp_{,un}aligned_validate_desc() and then lead
to UBs or just invalid frames to be queued for xmit.

desc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len
can cause positive integer overflow and wraparound, the same way low
enough desc->addr with a non-zero pool->tx_metadata_len can cause
negative integer overflow. Both scenarios can then pass the
validation successfully.
This doesn't happen with valid XSk applications, but can be used
to perform attacks.

Always promote desc->len to ``u64`` first to exclude positive
overflows of it. Use explicit check_{add,sub}_overflow() when
validating desc->addr (which is ``u64`` already).

bloat-o-meter reports a little growth of the code size:

add/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)
Function                                     old     new   delta
xskq_cons_peek_desc                          299     330     +31
xsk_tx_peek_release_desc_batch               973    1002     +29
xsk_generic_xmit                            3148    3132     -16

but hopefully this doesn't hurt the performance much.

Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Cc: [email-masked] # 6.8+
Signed-off-by: Alexander Lobakin <[email-masked]>
---
 net/xdp/xsk_queue.h | 45 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 35 insertions(+), 10 deletions(-)

diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index f16f390370dc..1eb8d9f8b104 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -143,14 +143,24 @@ static inline bool xp_unused_options_set(u32 options)
 static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
 					    struct xdp_desc *desc)
 {
-	u64 addr = desc->addr - pool->tx_metadata_len;
-	u64 len = desc->len + pool->tx_metadata_len;
-	u64 offset = addr & (pool->chunk_size - 1);
+	u64 len = desc->len;
+	u64 addr, offset;
 
-	if (!desc->len)
+	if (!len)
 		return false;
 
-	if (offset + len > pool->chunk_size)
+	/* Can overflow if desc->addr < pool->tx_metadata_len */
+	if (check_sub_overflow(desc->addr, pool->tx_metadata_len, &addr))
+		return false;
+
+	offset = addr & (pool->chunk_size - 1);
+
+	/*
+	 * Can't overflow: @offset is guaranteed to be < ``U32_MAX``
+	 * (pool->chunk_size is ``u32``), @len is guaranteed
+	 * to be <= ``U32_MAX``.
+	 */
+	if (offset + len + pool->tx_metadata_len > pool->chunk_size)
 		return false;
 
 	if (addr >= pool->addrs_cnt)
@@ -158,27 +168,42 @@ static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
 
 	if (xp_unused_options_set(desc->options))
 		return false;
+
 	return true;
 }
 
 static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
 					      struct xdp_desc *desc)
 {
-	u64 addr = xp_unaligned_add_offset_to_addr(desc->addr) - pool->tx_metadata_len;
-	u64 len = desc->len + pool->tx_metadata_len;
+	u64 len = desc->len;
+	u64 addr, end;
 
-	if (!desc->len)
+	if (!len)
 		return false;
 
+	/* Can't overflow: @len is guaranteed to be <= ``U32_MAX`` */
+	len += pool->tx_metadata_len;
 	if (len > pool->chunk_size)
 		return false;
 
-	if (addr >= pool->addrs_cnt || addr + len > pool->addrs_cnt ||
-	    xp_desc_crosses_non_contig_pg(pool, addr, len))
+	/* Can overflow if desc->addr is close to 0 */
+	if (check_sub_overflow(xp_unaligned_add_offset_to_addr(desc->addr),
+			       pool->tx_metadata_len, &addr))
+		return false;
+
+	if (addr >= pool->addrs_cnt)
+		return false;
+
+	/* Can overflow if pool->addrs_cnt is high enough */
+	if (check_add_overflow(addr, len, &end) || end > pool->addrs_cnt)
+		return false;
+
+	if (xp_desc_crosses_non_contig_pg(pool, addr, len))
 		return false;
 
 	if (xp_unused_options_set(desc->options))
 		return false;
+
 	return true;
 }
 
-- 
2.51.0

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Date: Thu, 9 Oct 2025 08:55:21 +1100 (AEDT)
From: Finn Thain <[email-masked]>
To: Lance Yang <[email-masked]>
cc: Andrew Morton <[email-masked]>, 
    Geert Uytterhoeven <[email-masked]>, 
    Eero Tamminen <[email-masked]>, 
    Kent Overstreet <[email-masked]>, [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
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    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Wed, 8 Oct 2025, Lance Yang wrote:

> On 2025/10/8 18:12, Finn Thain wrote:
> > 
> > On Wed, 8 Oct 2025, Lance Yang wrote:
> > 
> >>
> >> In other words, we are not just fixing the bug reported by Eero and 
> >> Geert, but correcting the blocker tracking mechanism's flawed 
> >> assumption for -stable ;)
> >>
> >> If you feel this doesn't qualify as a fix, I can change the Fixes: 
> >> tag to point to the original commit that introduced this flawed 
> >> mechanism instead.
> >>
> > 
> > That's really a question for the bug reporters. I don't personally 
> > have a problem with CONFIG_DETECT_HUNG_TASK_BLOCKER so I can't say 
> > whether the fix meets the requirements set in 
> > Documentation/process/stable-kernel-rules.rst. And I still don't know
> 
> I'm a bit confused, as I recall you previously stating that "It's wrong 
> and should be fixed"[1].
> 

You took that quote out of context. Please go and read it again.

> To clarify, is your current position that it should be fixed in general, 
> but the fix should not be backported to -stable?
> 

To clarify, what do you mean by "it"? Is it the commentary discussed in 
[1]? The misalignment of atomics? The misalignment of locks? The alignment 
assumptions in your code? The WARN reported by Eero and Geert?

> If so, then I have nothing further to add to this thread and am happy to 
> let the maintainer @Andrew decide.
> 
> > what's meant by "unnecessary warnings in a few unexpected cases".
> 
> The blocker tracking mechanism will trigger a warning when it encounters 
> any unaligned lock pointer (e.g., from a packed struct). I don't think 
> that is the expected behavior.

Sure, no-one was expecting false positives.

I think you are conflating "misaligned" with "not 4-byte aligned". Your 
algorithm does not strictly require natural alignment, it requires 4-byte 
alignment of locks.

Regarding your concern about packed structs, please re-read this message: 
https://lore.kernel.org/all/CAMuHMdV-AtPm-W-QUC1HixJ8Koy_HdESwCCOhRs3Q26=[email-masked]/

AFAIK the problem with your code is nothing more than the usual difficulty 
encountered when porting between architectures that have different 
alignment rules for scalar variables.

Therefore, my question about the theoretical nature of the problem comes 
down to this.

Is the m68k architecture the only one producing actual false positives? 

Do you know of actual instances of locks in packed structs?

> Instead, it should simply skip any unaligned pointer it cannot handle. 
> For the stable kernels, at least, this is the correct behavior.
> 

Why? Are users of the stable branch actually affected?

> [1]
> https://lore.kernel.org/lkml/[email-masked]/
> 
> 

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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
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	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
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Subject: [PATCH v3 17/19 5.15.y] minmax.h: move all the clamp() definitions after the min/max() ones
Date: Wed, 8 Oct 2025 15:29:42 +0000
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From: David Laight <[email-masked]>

[ Upstream commit c3939872ee4a6b8bdcd0e813c66823b31e6e26f7 ]

At some point the definitions for clamp() got added in the middle of the
ones for min() and max().  Re-order the definitions so they are more
sensibly grouped.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 109 +++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 58 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 91aa1b90c1bb..75fb7a6ad4c6 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -99,22 +99,6 @@
 #define __careful_cmp(op, x, y) \
 	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __clamp(val, lo, hi)	\
-	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
-	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
-		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
-		"clamp("#val", "#lo", "#hi") signedness error");		\
-	__clamp(uval, ulo, uhi); })
-
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
-
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -170,6 +154,22 @@
 #define max3(x, y, z) \
 	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
+/**
+ * min_t - return minimum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
+
+/**
+ * max_t - return maximum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
@@ -180,6 +180,22 @@
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
@@ -191,28 +207,30 @@
  */
 #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
-/*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max/clamp at all, of course.
- */
-
 /**
- * min_t - return minimum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_t - return a value clamped to a given range using a given type
+ * @type: the type of variable to use
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of type
+ * @type to make all the comparisons.
  */
-#define min_t(type, x, y) __cmp_once(min, type, x, y)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
- * max_t - return maximum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_val - return a value clamped to a given range using val's type
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of whatever
+ * type the input argument @val is.  This is useful when @val is an unsigned
+ * type and @lo and @hi are literals that will otherwise be assigned a signed
+ * integer type.
  */
-#define max_t(type, x, y) __cmp_once(max, type, x, y)
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
@@ -257,31 +275,6 @@
  */
 #define max_array(array, len) __minmax_array(max, array, len)
 
-/**
- * clamp_t - return a value clamped to a given range using a given type
- * @type: the type of variable to use
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of type
- * @type to make all the comparisons.
- */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
-
-/**
- * clamp_val - return a value clamped to a given range using val's type
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of whatever
- * type the input argument @val is.  This is useful when @val is an unsigned
- * type and @lo and @hi are literals that will otherwise be assigned a signed
- * integer type.
- */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
-
 static inline bool in_range64(u64 val, u64 start, u64 len)
 {
 	return (val - start) < len;
-- 
2.47.3

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Subject: [PATCH v3 18/19 5.15.y] minmax.h: simplify the variants of clamp()
Date: Wed, 8 Oct 2025 15:29:43 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ]

Always pass a 'type' through to __clamp_once(), pass '__auto_type' from
clamp() itself.

The expansion of __types_ok3() is reasonable so it isn't worth the added
complexity of avoiding it when a fixed type is used for all three values.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 75fb7a6ad4c6..2bbdd5b5e07e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -183,29 +183,29 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
+#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({			\
+	type uval = (val);							\
+	type ulo = (lo);							\
+	type uhi = (hi);							\
 	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+#define __careful_clamp(type, val, lo, hi) \
+	__clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
- * clamp - return a value clamped to a given range with strict typechecking
+ * clamp - return a value clamped to a given range with typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
- * same type as @val.  See the unnecessary pointer comparisons.
+ * This macro checks @val/@lo/@hi to make sure they have compatible
+ * signedness.
  */
-#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
+#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
 
 /**
  * clamp_t - return a value clamped to a given range using a given type
@@ -217,7 +217,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
+#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
@@ -230,7 +230,7 @@
  * type and @lo and @hi are literals that will otherwise be assigned a signed
  * integer type.
  */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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 Falcato" <[email-masked]>
Subject: [PATCH v3 19/19 5.15.y] minmax.h: remove some #defines that are only expanded once
Date: Wed, 8 Oct 2025 15:29:44 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 2b97aaf74ed534fb838d09867d09a3ca5d795208 ]

The bodies of __signed_type_use() and __unsigned_type_use() are much the
same size as their names - so put the bodies in the only line that expands
them.

Similarly __signed_type() is defined separately for 64bit and then used
exactly once just below.

Change the test for __signed_type from CONFIG_64BIT to one based on gcc
defined macros so that the code is valid if it gets used outside of a
kernel build.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2bbdd5b5e07e..eaaf5c008e4d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,8 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(ux) (2 + __is_nonneg(ux))
-#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
 #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(ux) : __unsigned_type_use(ux))
+	(2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -57,7 +55,7 @@
  * A cast is needed to avoid any warnings from values that aren't signed
  * integer types (in which case the result doesn't matter).
  *
- * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * On 64-bit any integer or pointer type can safely be cast to 'long long'.
  * But on 32-bit we need to avoid warnings about casting pointers to integers
  * of different sizes without truncating 64-bit values so 'long' or 'long long'
  * must be used depending on the size of the value.
@@ -66,12 +64,12 @@
  * them, but we do not use s128 types in the kernel (we do use 'u128',
  * but they are handled by the !is_signed_type() case).
  */
-#ifdef CONFIG_64BIT
-  #define __signed_type(ux) long
+#if __SIZEOF_POINTER__ == __SIZEOF_LONG_LONG__
+#define __is_nonneg(ux) statically_true((long long)(ux) >= 0)
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
+#define __is_nonneg(ux) statically_true( \
+	(typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
 #endif
-#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
 #define __types_ok(ux, uy) \
 	(__sign_use(ux) & __sign_use(uy))
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH v3 15/19 5.15.y] minmax.h: reduce the #define expansion of min(), max() and clamp()
Date: Wed, 8 Oct 2025 15:29:40 +0000
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From: David Laight <[email-masked]>

[ Upstream commit b280bb27a9f7c91ddab730e1ad91a9c18a051f41 ]

Since the test for signed values being non-negative only relies on
__builtion_constant_p() (not is_constexpr()) it can use the 'ux' variable
instead of the caller supplied expression.  This means that the #define
parameters are only expanded twice.  Once in the code and once quoted in
the error message.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 24e4b372649a..6f7ea669d305 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,10 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
-#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
-#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
+#define __signed_type_use(ux) (2 + __is_nonneg(ux))
+#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(ux) : __unsigned_type_use(ux))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -71,13 +71,13 @@
 #else
   #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
+#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
-#define __types_ok(x, y, ux, uy) \
-	(__sign_use(x, ux) & __sign_use(y, uy))
+#define __types_ok(ux, uy) \
+	(__sign_use(ux) & __sign_use(uy))
 
-#define __types_ok3(x, y, z, ux, uy, uz) \
-	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
+#define __types_ok3(ux, uy, uz) \
+	(__sign_use(ux) & __sign_use(uy) & __sign_use(uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -92,7 +92,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(ux, uy),		\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -109,7 +109,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -149,7 +149,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(ux, uy, uz),			\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
-- 
2.47.3

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	<[email-masked]>, <[email-masked]>
CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
	Dan Carpenter <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH v3 16/19 5.15.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
Date: Wed, 8 Oct 2025 15:29:41 +0000
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From: David Laight <[email-masked]>

[ Upstream commit a5743f32baec4728711bbc01d6ac2b33d4c67040 ]

Use BUILD_BUG_ON_MSG(statically_true(ulo > uhi), ...) for the sanity check
of the bounds in clamp().  Gives better error coverage and one less
expansion of the arguments.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 6f7ea669d305..91aa1b90c1bb 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -106,8 +106,7 @@
 	__auto_type uval = (val);						\
 	__auto_type ulo = (lo);							\
 	__auto_type uhi = (hi);							\
-	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-			(lo) <= (hi), true),					\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
-- 
2.47.3

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Subject: [PATCH v3 14/19 5.15.y] minmax.h: update some comments
Date: Wed, 8 Oct 2025 15:29:39 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 10666e99204818ef45c702469488353b5bb09ec7 ]

- Change three to several.
- Remove the comment about retaining constant expressions, no longer true.
- Realign to nearer 80 columns and break on major punctiation.
- Add a leading comment to the block before __signed_type() and __is_nonneg()
  Otherwise the block explaining the cast is a bit 'floating'.
  Reword the rest of that comment to improve readability.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 53 +++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 51b0d988e322..24e4b372649a 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 
 /*
- * min()/max()/clamp() macros must accomplish three things:
+ * min()/max()/clamp() macros must accomplish several things:
  *
  * - Avoid multiple evaluations of the arguments (so side-effects like
  *   "x++" happen only once) when non-constant.
- * - Retain result as a constant expressions when called with only
- *   constant expressions (to avoid tripping VLA warnings in stack
- *   allocation usage).
  * - Perform signed v unsigned type-checking (to generate compile
  *   errors instead of nasty runtime surprises).
  * - Unsigned char/short are always promoted to signed int and can be
@@ -31,25 +28,23 @@
  *   bit #0 set if ok for unsigned comparisons
  *   bit #1 set if ok for signed comparisons
  *
- * In particular, statically non-negative signed integer
- * expressions are ok for both.
+ * In particular, statically non-negative signed integer expressions
+ * are ok for both.
  *
- * NOTE! Unsigned types smaller than 'int' are implicitly
- * converted to 'int' in expressions, and are accepted for
- * signed conversions for now. This is debatable.
+ * NOTE! Unsigned types smaller than 'int' are implicitly converted to 'int'
+ * in expressions, and are accepted for signed conversions for now.
+ * This is debatable.
  *
- * Note that 'x' is the original expression, and 'ux' is
- * the unique variable that contains the value.
+ * Note that 'x' is the original expression, and 'ux' is the unique variable
+ * that contains the value.
  *
- * We use 'ux' for pure type checking, and 'x' for when
- * we need to look at the value (but without evaluating
- * it for side effects! Careful to only ever evaluate it
- * with sizeof() or __builtin_constant_p() etc).
+ * We use 'ux' for pure type checking, and 'x' for when we need to look at the
+ * value (but without evaluating it for side effects!
+ * Careful to only ever evaluate it with sizeof() or __builtin_constant_p() etc).
  *
- * Pointers end up being checked by the normal C type
- * rules at the actual comparison, and these expressions
- * only need to be careful to not cause warnings for
- * pointer use.
+ * Pointers end up being checked by the normal C type rules at the actual
+ * comparison, and these expressions only need to be careful to not cause
+ * warnings for pointer use.
  */
 #define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
 #define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
@@ -57,19 +52,19 @@
 	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
- * To avoid warnings about casting pointers to integers
- * of different sizes, we need that special sign type.
+ * Check whether a signed value is always non-negative.
  *
- * On 64-bit we can just always use 'long', since any
- * integer or pointer type can just be cast to that.
+ * A cast is needed to avoid any warnings from values that aren't signed
+ * integer types (in which case the result doesn't matter).
  *
- * This does not work for 128-bit signed integers since
- * the cast would truncate them, but we do not use s128
- * types in the kernel (we do use 'u128', but they will
- * be handled by the !is_signed_type() case).
+ * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * But on 32-bit we need to avoid warnings about casting pointers to integers
+ * of different sizes without truncating 64-bit values so 'long' or 'long long'
+ * must be used depending on the size of the value.
  *
- * NOTE! The cast is there only to avoid any warnings
- * from when values that aren't signed integer types.
+ * This does not work for 128-bit signed integers since the cast would truncate
+ * them, but we do not use s128 types in the kernel (we do use 'u128',
+ * but they are handled by the !is_signed_type() case).
  */
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, Arnd Bergmann
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	<[email-masked]>
Subject: [PATCH v3 11/19 5.15.y] minmax: improve macro expansion and type checking
Date: Wed, 8 Oct 2025 15:29:36 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 22f5468731491e53356ba7c028f0fdea20b18e2c ]

This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.

In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:

 - an expression with a signed type can be used for
    (1) signed comparisons
    (2) unsigned comparisons if it is statically known to have a
        non-negative value

 - an expression with an unsigned type can be used for
    (3) unsigned comparison
    (4) signed comparisons if the type is smaller than 'int' and thus
        the C integer promotion rules will make it signed anyway

Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.

Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel.  Notably with
bcachefs having an expression like

	min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)

where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.

Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.

However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.

But at least for now the rule is in place for backwards compatibility.

Also note that rule (2) existed before, but is hugely relaxed by this
commit.  It used to be true only for the simplest compile-time
non-negative integer constants.  The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.

For example, the amdgpu driver does

	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));

because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.

Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.

Cc: Arnd Bergmann <[email-masked]>
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/compiler.h |  9 +++++
 include/linux/minmax.h   | 74 ++++++++++++++++++++++++++++++++--------
 2 files changed, 68 insertions(+), 15 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 4f03dfb6de0d..ee9e39d315c8 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -258,6 +258,15 @@ static inline void *offset_to_ptr(const int *off)
  */
 #define is_signed_type(type) (((type)(-1)) < (__force type)1)
 
+/*
+ * Useful shorthand for "is this condition known at compile-time?"
+ *
+ * Note that the condition may involve non-constant values,
+ * but the compiler may know enough about the details of the
+ * values to determine that the condition is statically true.
+ */
+#define statically_true(x) (__builtin_constant_p(x) && (x))
+
 /*
  * This is needed in functions which generate the stack canary, see
  * arch/x86/kernel/smpboot.c::start_secondary() for an example.
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index e3e4353df983..41da6f85a407 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -26,19 +26,63 @@
 #define __typecheck(x, y) \
 	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
 
-/* is_signed_type() isn't a constexpr for pointer types */
-#define __is_signed(x) 								\
-	__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))),	\
-		is_signed_type(typeof(x)), 0)
+/*
+ * __sign_use for integer expressions:
+ *   bit #0 set if ok for unsigned comparisons
+ *   bit #1 set if ok for signed comparisons
+ *
+ * In particular, statically non-negative signed integer
+ * expressions are ok for both.
+ *
+ * NOTE! Unsigned types smaller than 'int' are implicitly
+ * converted to 'int' in expressions, and are accepted for
+ * signed conversions for now. This is debatable.
+ *
+ * Note that 'x' is the original expression, and 'ux' is
+ * the unique variable that contains the value.
+ *
+ * We use 'ux' for pure type checking, and 'x' for when
+ * we need to look at the value (but without evaluating
+ * it for side effects! Careful to only ever evaluate it
+ * with sizeof() or __builtin_constant_p() etc).
+ *
+ * Pointers end up being checked by the normal C type
+ * rules at the actual comparison, and these expressions
+ * only need to be careful to not cause warnings for
+ * pointer use.
+ */
+#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
+#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
+#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
+	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+
+/*
+ * To avoid warnings about casting pointers to integers
+ * of different sizes, we need that special sign type.
+ *
+ * On 64-bit we can just always use 'long', since any
+ * integer or pointer type can just be cast to that.
+ *
+ * This does not work for 128-bit signed integers since
+ * the cast would truncate them, but we do not use s128
+ * types in the kernel (we do use 'u128', but they will
+ * be handled by the !is_signed_type() case).
+ *
+ * NOTE! The cast is there only to avoid any warnings
+ * from when values that aren't signed integer types.
+ */
+#ifdef CONFIG_64BIT
+  #define __signed_type(ux) long
+#else
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+#endif
+#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
 
-/* True for a non-negative signed int constant */
-#define __is_noneg_int(x)	\
-	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
+#define __types_ok(x,y,ux,uy) \
+	(__sign_use(x,ux) & __sign_use(y,uy))
 
-#define __types_ok(x, y, ux, uy) 				\
-	(__is_signed(ux) == __is_signed(uy) ||			\
-	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
-	 __is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok3(x,y,z,ux,uy,uz) \
+	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -53,8 +97,8 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	static_assert(__types_ok(x, y, ux, uy),		\
-		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
 #define __careful_cmp(op, x, y) \
@@ -70,8 +114,8 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
 #define __careful_clamp(val, lo, hi) \
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
	Dan Carpenter <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH v3 13/19 5.15.y] minmax.h: add whitespace around operators and after commas
Date: Wed, 8 Oct 2025 15:29:38 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 71ee9b16251ea4bf7c1fe222517c82bdb3220acc ]

Patch series "minmax.h: Cleanups and minor optimisations".

Some tidyups and minor changes to minmax.h.

This patch (of 7):

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 98008dd92153..51b0d988e322 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -51,10 +51,10 @@
  * only need to be careful to not cause warnings for
  * pointer use.
  */
-#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
-#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
-#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
-	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
+#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
  * To avoid warnings about casting pointers to integers
@@ -74,15 +74,15 @@
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
+#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
 
-#define __types_ok(x,y,ux,uy) \
-	(__sign_use(x,ux) & __sign_use(y,uy))
+#define __types_ok(x, y, ux, uy) \
+	(__sign_use(x, ux) & __sign_use(y, uy))
 
-#define __types_ok3(x,y,z,ux,uy,uz) \
-	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
+#define __types_ok3(x, y, z, ux, uy, uz) \
+	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -97,7 +97,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -114,7 +114,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -154,7 +154,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
@@ -326,9 +326,9 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
-#define MIN(a,b) __cmp(min,a,b)
-#define MAX(a,b) __cmp(max,a,b)
-#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
-#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+#define MIN(a, b) __cmp(min, a, b)
+#define MAX(a, b) __cmp(max, a, b)
+#define MIN_T(type, a, b) __cmp(min, (type)(a), (type)(b))
+#define MAX_T(type, a, b) __cmp(max, (type)(a), (type)(b))
 
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Arnd Bergmann <[email-masked]>
Subject: [PATCH v3 12/19 5.15.y] minmax: fix up min3() and max3() too
Date: Wed, 8 Oct 2025 15:29:37 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 21b136cc63d2a9ddd60d4699552b69c214b32964 ]

David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.

And our current macros are actually rather broken.

In particular, the macros did this:

  #define min3(x, y, z) min((typeof(x))min(x, y), z)
  #define max3(x, y, z) max((typeof(x))max(x, y), z)

and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.

For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'.  The types are
compatible, and there's no warning - but the result is just random
garbage.

No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.

Requested-by: David Laight <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 41da6f85a407..98008dd92153 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -152,13 +152,20 @@
 #define umax(x, y)	\
 	__careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
 
+#define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
+	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
+	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+		#op"3("#x", "#y", "#z") signedness error");		\
+	__cmp(op, ux, __cmp(op, uy, uz)); })
+
 /**
  * min3 - return minimum of three values
  * @x: first value
  * @y: second value
  * @z: third value
  */
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
+#define min3(x, y, z) \
+	__careful_op3(min, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * max3 - return maximum of three values
@@ -166,7 +173,8 @@
  * @y: second value
  * @z: third value
  */
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
+#define max3(x, y, z) \
+	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 09/19 5.15.y] minmax: don't use max() in situations that want a C constant expression
Date: Wed, 8 Oct 2025 15:29:34 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 drivers/md/dm-integrity.c                | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index 4cd3e533740b..74b1bd331425 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -268,7 +268,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 8e2b00536c3e..9e2bbfe328f0 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1705,7 +1705,7 @@ static void integrity_metadata(struct work_struct *w)
 		struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
 		char *checksums;
 		unsigned extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0;
-		char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+		char checksums_onstack[MAX(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 		sector_t sector;
 		unsigned sectors_to_process;
 
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 51e04efe3e20..8f96ddaceb9a 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d86abdc77c26..e46eb93c115d 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1100,7 +1100,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3

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Subject: [PATCH v3 10/19 5.15.y] minmax: simplify min()/max()/clamp() implementation
Date: Wed, 8 Oct 2025 15:29:35 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit dc1c8034e31b14a2e5e212104ec508aec44ce1b9 ]

Now that we no longer have any C constant expression contexts (ie array
size declarations or static initializers) that use min() or max(), we
can simpify the implementation by not having to worry about the result
staying as a C constant expression.

So now we can unconditionally just use temporary variables of the right
type, and get rid of the excessive expansion that used to come from the
use of

   __builtin_choose_expr(__is_constexpr(...), ..

to pick the specialized code for constant expressions.

Another expansion simplification is to pass the temporary variables (in
addition to the original expression) to our __types_ok() macro.  That
may superficially look like it complicates the macro, but when we only
want the type of the expression, expanding the temporary variable names
is much simpler and smaller than expanding the potentially complicated
original expression.

As a result, on my machine, doing a

  $ time make drivers/staging/media/atomisp/pci/isp/kernels/ynr/ynr_1.0/ia_css_ynr.host.i

goes from

	real	0m16.621s
	user	0m15.360s
	sys	0m1.221s

to

	real	0m2.532s
	user	0m2.091s
	sys	0m0.452s

because the token expansion goes down dramatically.

In particular, the longest line expansion (which was line 71 of that
'ia_css_ynr.host.c' file) shrinks from 23,338kB (yes, 23MB for one
single line) to "just" 1,444kB (now "only" 1.4MB).

And yes, that line is still the line from hell, because it's doing
multiple levels of "min()/max()" expansion thanks to some of them being
hidden inside the uDIGIT_FITTING() macro.

Lorenzo has a nice cleanup patch that makes that driver use inline
functions instead of macros for sDIGIT_FITTING() and uDIGIT_FITTING(),
which will fix that line once and for all, but the 16-fold reduction in
this case does show why we need to simplify these helpers.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 43 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index fc384714da45..e3e4353df983 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -35,10 +35,10 @@
 #define __is_noneg_int(x)	\
 	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
 
-#define __types_ok(x, y) 					\
-	(__is_signed(x) == __is_signed(y) ||			\
-		__is_signed((x) + 0) == __is_signed((y) + 0) ||	\
-		__is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok(x, y, ux, uy) 				\
+	(__is_signed(ux) == __is_signed(uy) ||			\
+	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
+	 __is_noneg_int(x) || __is_noneg_int(y))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -51,34 +51,31 @@
 #define __cmp_once(op, type, x, y) \
 	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __careful_cmp_once(op, x, y) ({			\
-	static_assert(__types_ok(x, y),			\
+#define __careful_cmp_once(op, x, y, ux, uy) ({		\
+	__auto_type ux = (x); __auto_type uy = (y);	\
+	static_assert(__types_ok(x, y, ux, uy),		\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp_once(op, __auto_type, x, y); })
+	__cmp(op, ux, uy); })
 
-#define __careful_cmp(op, x, y)					\
-	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y), __careful_cmp_once(op, x, y))
+#define __careful_cmp(op, x, y) \
+	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
-	typeof(val) unique_val = (val);						\
-	typeof(lo) unique_lo = (lo);						\
-	typeof(hi) unique_hi = (hi);						\
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-	__clamp(unique_val, unique_lo, unique_hi); })
-
-#define __careful_clamp(val, lo, hi) ({					\
-	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-		__clamp(val, lo, hi),					\
-		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
-			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
  * min - return minimum of two values of the same or compatible types
-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 07/19 5.15.y] minmax: simplify and clarify min_t()/max_t() implementation
Date: Wed, 8 Oct 2025 15:29:32 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 017fa3e89187848fd056af757769c9e66ac3e93d ]

This simplifies the min_t() and max_t() macros by no longer making them
work in the context of a C constant expression.

That means that you can no longer use them for static initializers or
for array sizes in type definitions, but there were only a couple of
such uses, and all of them were converted (famous last words) to use
MIN_T/MAX_T instead.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
V1 -> V2:
Use `[ Upstream commit <HASH> ]` instead of `commit <HASH> upstream.`
like in all other patches.

 include/linux/minmax.h | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index a7ef65f78933..9c2848abc804 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -45,17 +45,20 @@
 
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
-#define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-	typeof(x) unique_x = (x);			\
-	typeof(y) unique_y = (y);			\
+#define __cmp_once_unique(op, type, x, y, ux, uy) \
+	({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
+
+#define __cmp_once(op, type, x, y) \
+	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
+
+#define __careful_cmp_once(op, x, y) ({			\
 	static_assert(__types_ok(x, y),			\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp(op, unique_x, unique_y); })
+	__cmp_once(op, __auto_type, x, y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y),				\
-		__cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y)))
+		__cmp(op, x, y), __careful_cmp_once(op, x, y))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
@@ -158,7 +161,7 @@
  * @x: first value
  * @y: second value
  */
-#define min_t(type, x, y)	__careful_cmp(min, (type)(x), (type)(y))
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
 
 /**
  * max_t - return maximum of two values, using the specified type
@@ -166,7 +169,7 @@
  * @x: first value
  * @y: second value
  */
-#define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 08/19 5.15.y] minmax: make generic MIN() and MAX() macros available everywhere
Date: Wed, 8 Oct 2025 15:29:33 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 1a251f52cfdc417c84411a056bc142cbd77baef4 ]

This just standardizes the use of MIN() and MAX() macros, with the very
traditional semantics.  The goal is to use these for C constant
expressions and for top-level / static initializers, and so be able to
simplify the min()/max() macros.

These macro names were used by various kernel code - they are very
traditional, after all - and all such users have been fixed up, with a
few different approaches:

 - trivial duplicated macro definitions have been removed

   Note that 'trivial' here means that it's obviously kernel code that
   already included all the major kernel headers, and thus gets the new
   generic MIN/MAX macros automatically.

 - non-trivial duplicated macro definitions are guarded with #ifndef

   This is the "yes, they define their own versions, but no, the include
   situation is not entirely obvious, and maybe they don't get the
   generic version automatically" case.

 - strange use case #1

   A couple of drivers decided that the way they want to describe their
   versioning is with

	#define MAJ 1
	#define MIN 2
	#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)

   which adds zero value and I just did my Alexander the Great
   impersonation, and rewrote that pointless Gordian knot as

	#define DRV_VERSION "1.2"

   instead.

 - strange use case #2

   A couple of drivers thought that it's a good idea to have a random
   'MIN' or 'MAX' define for a value or index into a table, rather than
   the traditional macro that takes arguments.

   These values were re-written as C enum's instead. The new
   function-line macros only expand when followed by an open
   parenthesis, and thus don't clash with enum use.

Happily, there weren't really all that many of these cases, and a lot of
users already had the pattern of using '#ifndef' guarding (or in one
case just using '#undef MIN') before defining their own private version
that does the same thing. I left such cases alone.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/um/drivers/mconsole_user.c               |  2 ++
 drivers/edac/skx_common.h                     |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  2 ++
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |  2 ++
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    | 14 +++++++----
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |  2 ++
 drivers/gpu/drm/radeon/evergreen_cs.c         |  2 ++
 drivers/hwmon/adt7475.c                       | 24 +++++++++----------
 drivers/media/dvb-frontends/stv0367_priv.h    |  3 +++
 drivers/net/fjes/fjes_main.c                  |  4 +---
 drivers/nfc/pn544/i2c.c                       |  2 --
 drivers/platform/x86/sony-laptop.c            |  1 -
 drivers/scsi/isci/init.c                      |  6 +----
 .../pci/hive_isp_css_include/math_support.h   |  5 ----
 include/linux/minmax.h                        |  2 ++
 kernel/trace/preemptirq_delay_test.c          |  2 --
 lib/btree.c                                   |  1 -
 lib/decompress_unlzma.c                       |  2 ++
 lib/zstd/zstd_internal.h                      |  2 --
 mm/zsmalloc.c                                 |  1 -
 tools/testing/selftests/vm/mremap_test.c      |  2 ++
 21 files changed, 43 insertions(+), 39 deletions(-)

diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
index e24298a734be..a04cd13c6315 100644
--- a/arch/um/drivers/mconsole_user.c
+++ b/arch/um/drivers/mconsole_user.c
@@ -71,7 +71,9 @@ static struct mconsole_command *mconsole_parse(struct mc_request *req)
 	return NULL;
 }
 
+#ifndef MIN
 #define MIN(a,b) ((a)<(b) ? (a):(b))
+#endif
 
 #define STRINGX(x) #x
 #define STRING(x) STRINGX(x)
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index 13f761930b4f..1a78f18cf7fe 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -44,7 +44,6 @@
 #define I10NM_NUM_CHANNELS	MAX(I10NM_NUM_DDR_CHANNELS, I10NM_NUM_HBM_CHANNELS)
 #define I10NM_NUM_DIMMS		MAX(I10NM_NUM_DDR_DIMMS, I10NM_NUM_HBM_DIMMS)
 
-#define MAX(a, b)	((a) > (b) ? (a) : (b))
 #define NUM_IMC		MAX(SKX_NUM_IMC, I10NM_NUM_IMC)
 #define NUM_CHANNELS	MAX(SKX_NUM_CHANNELS, I10NM_NUM_CHANNELS)
 #define NUM_DIMMS	MAX(SKX_NUM_DIMMS, I10NM_NUM_DIMMS)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index dbef22f56482..1ee8663fd866 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1277,7 +1277,9 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 
 #define amdgpu_inc_vram_lost(adev) atomic_inc(&((adev)->vram_lost_counter));
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 /* Common functions */
 bool amdgpu_device_has_job_running(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
index 1b2df97226a3..40286e8dd4e1 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
@@ -25,7 +25,9 @@
 
 #include "hdcp.h"
 
+#ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
 #define HDCP_I2C_ADDR 0x3a	/* 0x74 >> 1*/
 #define KSV_READ_SIZE 0xf	/* 0x6803b - 0x6802c */
 #define HDCP_MAX_AUX_TRANSACTION_SIZE 16
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
index dac29fe6cfc6..abbdb7731996 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
@@ -22,12 +22,18 @@
  */
 #include <asm/div64.h>
 
-#define SHIFT_AMOUNT 16 /* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+enum ppevvmath_constants {
+	/* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+	SHIFT_AMOUNT	= 16,
 
-#define PRECISION 5 /* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	/* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	PRECISION	=  5,
 
-#define SHIFTED_2 (2 << SHIFT_AMOUNT)
-#define MAX (1 << (SHIFT_AMOUNT - 1)) - 1 /* 32767 - Might change in the future */
+	SHIFTED_2	= (2 << SHIFT_AMOUNT),
+
+	/* 32767 - Might change in the future */
+	MAX		= (1 << (SHIFT_AMOUNT - 1)) - 1,
+};
 
 /* -------------------------------------------------------------------------------
  * NEW TYPE - fINT
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index d4fde146bd4c..95894c25881a 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -1964,7 +1964,9 @@ static void sienna_cichlid_get_override_pcie_settings(struct smu_context *smu,
 	}
 }
 
+#ifndef MAX
 #define MAX(a, b)	((a) > (b) ? (a) : (b))
+#endif
 
 static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
 					 uint32_t pcie_gen_cap,
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 820c2c3641d3..1311f10fad66 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -33,8 +33,10 @@
 #include "evergreen_reg_safe.h"
 #include "cayman_reg_safe.h"
 
+#ifndef MIN
 #define MAX(a,b)                   (((a)>(b))?(a):(b))
 #define MIN(a,b)                   (((a)<(b))?(a):(b))
+#endif
 
 #define REG_SAFE_BM_SIZE ARRAY_SIZE(evergreen_reg_safe_bm)
 
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index b4c0f01f52c4..1e0678eb0077 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -23,23 +23,23 @@
 #include <linux/util_macros.h>
 
 /* Indexes for the sysfs hooks */
-
-#define INPUT		0
-#define MIN		1
-#define MAX		2
-#define CONTROL		3
-#define OFFSET		3
-#define AUTOMIN		4
-#define THERM		5
-#define HYSTERSIS	6
-
+enum adt_sysfs_id {
+	INPUT		= 0,
+	MIN		= 1,
+	MAX		= 2,
+	CONTROL		= 3,
+	OFFSET		= 3,	// Dup
+	AUTOMIN		= 4,
+	THERM		= 5,
+	HYSTERSIS	= 6,
 /*
  * These are unique identifiers for the sysfs functions - unlike the
  * numbers above, these are not also indexes into an array
  */
+	ALARM		= 9,
+	FAULT		= 10,
+};
 
-#define ALARM		9
-#define FAULT		10
 
 /* 7475 Common Registers */
 
diff --git a/drivers/media/dvb-frontends/stv0367_priv.h b/drivers/media/dvb-frontends/stv0367_priv.h
index 617f605947b2..7f056d1cce82 100644
--- a/drivers/media/dvb-frontends/stv0367_priv.h
+++ b/drivers/media/dvb-frontends/stv0367_priv.h
@@ -25,8 +25,11 @@
 #endif
 
 /* MACRO definitions */
+#ifndef MIN
 #define MAX(X, Y) ((X) >= (Y) ? (X) : (Y))
 #define MIN(X, Y) ((X) <= (Y) ? (X) : (Y))
+#endif
+
 #define INRANGE(X, Y, Z) \
 	((((X) <= (Y)) && ((Y) <= (Z))) || \
 	(((Z) <= (Y)) && ((Y) <= (X))) ? 1 : 0)
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 1d1808afd529..792c22ba5b00 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -14,9 +14,7 @@
 #include "fjes.h"
 #include "fjes_trace.h"
 
-#define MAJ 1
-#define MIN 2
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
+#define DRV_VERSION "1.2"
 #define DRV_NAME	"fjes"
 char fjes_driver_name[] = DRV_NAME;
 char fjes_driver_version[] = DRV_VERSION;
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index 37d26f01986b..fd7026206f58 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -126,8 +126,6 @@ struct pn544_i2c_fw_secure_blob {
 #define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0
 #define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6
 
-#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
-
 #define PN544_FW_WRITE_BUFFER_MAX_LEN 0x9f7
 #define PN544_FW_I2C_MAX_PAYLOAD PN544_HCI_I2C_LLC_MAX_SIZE
 #define PN544_FW_I2C_WRITE_FRAME_HEADER_LEN 8
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 336dee9485d4..3c27d6b66bb4 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -757,7 +757,6 @@ static union acpi_object *__call_snc_method(acpi_handle handle, char *method,
 	return result;
 }
 
-#define MIN(a, b)	(a > b ? b : a)
 static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
 		void *buffer, size_t buflen)
 {
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index bd73f6925a9d..73144b2966ba 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -65,11 +65,7 @@
 #include "task.h"
 #include "probe_roms.h"
 
-#define MAJ 1
-#define MIN 2
-#define BUILD 0
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
-	__stringify(BUILD)
+#define DRV_VERSION "1.2.0"
 
 MODULE_VERSION(DRV_VERSION);
 
diff --git a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
index a444ec14ff9d..1c17a87a8572 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
@@ -31,11 +31,6 @@
 /* A => B */
 #define IMPLIES(a, b)        (!(a) || (b))
 
-/* for preprocessor and array sizing use MIN and MAX
-   otherwise use min and max */
-#define MAX(a, b)            (((a) > (b)) ? (a) : (b))
-#define MIN(a, b)            (((a) < (b)) ? (a) : (b))
-
 #define ROUND_DIV(a, b)      (((b) != 0) ? ((a) + ((b) >> 1)) / (b) : 0)
 #define CEIL_DIV(a, b)       (((b) != 0) ? ((a) + (b) - 1) / (b) : 0)
 #define CEIL_MUL(a, b)       (CEIL_DIV(a, b) * (b))
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 9c2848abc804..fc384714da45 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -277,6 +277,8 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
+#define MIN(a,b) __cmp(min,a,b)
+#define MAX(a,b) __cmp(max,a,b)
 #define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
 #define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
 
diff --git a/kernel/trace/preemptirq_delay_test.c b/kernel/trace/preemptirq_delay_test.c
index 8af92dbe98f0..acb0c971a408 100644
--- a/kernel/trace/preemptirq_delay_test.c
+++ b/kernel/trace/preemptirq_delay_test.c
@@ -34,8 +34,6 @@ MODULE_PARM_DESC(cpu_affinity, "Cpu num test is running on");
 
 static struct completion done;
 
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
 static void busy_wait(ulong time)
 {
 	u64 start, end;
diff --git a/lib/btree.c b/lib/btree.c
index b4cf08a5c267..b12f99d4c45c 100644
--- a/lib/btree.c
+++ b/lib/btree.c
@@ -43,7 +43,6 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define NODESIZE MAX(L1_CACHE_BYTES, 128)
 
 struct btree_geo {
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 20a858031f12..9d34d35908da 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -37,7 +37,9 @@
 
 #include <linux/decompress/mm.h>
 
+#ifndef MIN
 #define	MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
 
 static long long INIT read_int(unsigned char *ptr, int size)
 {
diff --git a/lib/zstd/zstd_internal.h b/lib/zstd/zstd_internal.h
index dac753397f86..927ed4e8c11c 100644
--- a/lib/zstd/zstd_internal.h
+++ b/lib/zstd/zstd_internal.h
@@ -36,8 +36,6 @@
 /*-*************************************
 *  shared macros
 ***************************************/
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define CHECK_F(f)                       \
 	{                                \
 		size_t const errcod = f; \
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 79f389d620c9..fd01f6922874 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -126,7 +126,6 @@
 #define ISOLATED_BITS	3
 #define MAGIC_VAL_BITS	8
 
-#define MAX(a, b) ((a) >= (b) ? (a) : (b))
 /* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */
 #define ZS_MIN_ALLOC_SIZE \
 	MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS))
diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c
index 58775dab3cc6..92fb74865f26 100644
--- a/tools/testing/selftests/vm/mremap_test.c
+++ b/tools/testing/selftests/vm/mremap_test.c
@@ -22,7 +22,9 @@
 #define VALIDATION_DEFAULT_THRESHOLD 4	/* 4MB */
 #define VALIDATION_NO_THRESHOLD 0	/* Verify the entire region */
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 struct config {
 	unsigned long long src_alignment;
-- 
2.47.3

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CC: Christoph Hellwig <[email-masked]>, "Jason A. Donenfeld"
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Subject: [PATCH v3 04/19 5.15.y] minmax: fix indentation of __cmp_once() and __clamp_once()
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From: David Laight <[email-masked]>

[ Upstream commit f4b84b2ff851f01d0fac619eadef47eb41648534 ]

Remove the extra indentation and align continuation markers.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Linus Torvalds <[email-masked]>
Cc: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 62b0c0a3cf30..2ec559284a9f 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,11 +46,11 @@
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
 #define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-		typeof(x) unique_x = (x);		\
-		typeof(y) unique_y = (y);		\
-		static_assert(__types_ok(x, y),		\
-			#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-		__cmp(op, unique_x, unique_y); })
+	typeof(x) unique_x = (x);			\
+	typeof(y) unique_y = (y);			\
+	static_assert(__types_ok(x, y),			\
+		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	__cmp(op, unique_x, unique_y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
@@ -60,16 +60,16 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({	\
-		typeof(val) unique_val = (val);				\
-		typeof(lo) unique_lo = (lo);				\
-		typeof(hi) unique_hi = (hi);				\
-		static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-				(lo) <= (hi), true),					\
-			"clamp() low limit " #lo " greater than high limit " #hi);	\
-		static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-		static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-		__clamp(unique_val, unique_lo, unique_hi); })
+#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
+	typeof(val) unique_val = (val);						\
+	typeof(lo) unique_lo = (lo);						\
+	typeof(hi) unique_hi = (hi);						\
+	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
+			(lo) <= (hi), true),					\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
+	__clamp(unique_val, unique_lo, unique_hi); })
 
 #define __careful_clamp(val, lo, hi) ({					\
 	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, David Laight <[email-masked]>
Subject: [PATCH v3 05/19 5.15.y] minmax: avoid overly complicated constant expressions in VM code
Date: Wed, 8 Oct 2025 15:29:30 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 3a7e02c040b130b5545e4b115aada7bacd80a2b6 ]

The minmax infrastructure is overkill for simple constants, and can
cause huge expansions because those simple constants are then used by
other things.

For example, 'pageblock_order' is a core VM constant, but because it was
implemented using 'min_t()' and all the type-checking that involves, it
actually expanded to something like 2.5kB of preprocessor noise.

And when that simple constant was then used inside other expansions:

  #define pageblock_nr_pages      (1UL << pageblock_order)
  #define pageblock_start_pfn(pfn)  ALIGN_DOWN((pfn), pageblock_nr_pages)

and we then use that inside a 'max()' macro:

	case ISOLATE_SUCCESS:
		update_cached = false;
		last_migrated_pfn = max(cc->zone->zone_start_pfn,
			pageblock_start_pfn(cc->migrate_pfn - 1));

the end result was that one statement expanding to 253kB in size.

There are probably other cases of this, but this one case certainly
stood out.

I've added 'MIN_T()' and 'MAX_T()' macros for this kind of "core simple
constant with specific type" use.  These macros skip the type checking,
and as such need to be very sparingly used only for obvious cases that
have active issues like this.

Reported-by: Lorenzo Stoakes <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2ec559284a9f..a7ef65f78933 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -270,4 +270,11 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
 #define swap(a, b) \
 	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
 
+/*
+ * Use these carefully: no type checking, and uses the arguments
+ * multiple times. Use for obvious constants only.
+ */
+#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
+#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 06/19 5.15.y] minmax: add a few more MIN_T/MAX_T users
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 4477b39c32fdc03363affef4b11d48391e6dc9ff ]

Commit 3a7e02c040b1 ("minmax: avoid overly complicated constant
expressions in VM code") added the simpler MIN_T/MAX_T macros in order
to avoid some excessive expansion from the rather complicated regular
min/max macros.

The complexity of those macros stems from two issues:

 (a) trying to use them in situations that require a C constant
     expression (in static initializers and for array sizes)

 (b) the type sanity checking

and MIN_T/MAX_T avoids both of these issues.

Now, in the whole (long) discussion about all this, it was pointed out
that the whole type sanity checking is entirely unnecessary for
min_t/max_t which get a fixed type that the comparison is done in.

But that still leaves min_t/max_t unnecessarily complicated due to
worries about the C constant expression case.

However, it turns out that there really aren't very many cases that use
min_t/max_t for this, and we can just force-convert those.

This does exactly that.

Which in turn will then allow for much simpler implementations of
min_t()/max_t().  All the usual "macros in all upper case will evaluate
the arguments multiple times" rules apply.

We should do all the same things for the regular min/max() vs MIN/MAX()
cases, but that has the added complexity of various drivers defining
their own local versions of MIN/MAX, so that needs another level of
fixes first.

Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
V2 -> V3:
Fix fs/erofs/zdata.h to use MIN_T instead of min_t to fix build on the
following patch:
In file included from ./include/linux/kernel.h:16,
                 from ./include/linux/list.h:9,
                 from ./include/linux/wait.h:7,
                 from ./include/linux/wait_bit.h:8,
                 from ./include/linux/fs.h:6,
                 from fs/erofs/internal.h:10,
                 from fs/erofs/zdata.h:9,
                 from fs/erofs/zdata.c:6:
fs/erofs/zdata.c: In function ‘z_erofs_decompress_pcluster’:
fs/erofs/zdata.h:185:61: error: ISO C90 forbids variable length array ‘pages_onstack’ [-Werror=vla]
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |                                                             ^~~~
./include/linux/minmax.h:49:23: note: in definition of macro ‘__cmp_once_unique’
   49 |         ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
      |                       ^
./include/linux/minmax.h:164:27: note: in expansion of macro ‘__cmp_once’
  164 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
      |                           ^~~~~~~~~~
fs/erofs/zdata.h:185:9: note: in expansion of macro ‘min_t’
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |         ^~~~~
fs/erofs/zdata.c:847:36: note: in expansion of macro ‘Z_EROFS_VMAP_ONSTACK_PAGES’
  847 |         struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES];
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

V1 -> V2:
Use `[ Upstream commit <HASH> ]` instead of `commit <HASH> upstream.`
like in all other patches.

 arch/x86/mm/pgtable.c                             | 2 +-
 drivers/edac/sb_edac.c                            | 4 ++--
 drivers/gpu/drm/drm_color_mgmt.c                  | 2 +-
 drivers/md/dm-integrity.c                         | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 fs/erofs/zdata.h                                  | 2 +-
 net/ipv4/proc.c                                   | 2 +-
 net/ipv6/proc.c                                   | 2 +-
 8 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 3481b35cb4ec..e649161eb6fc 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -107,7 +107,7 @@ static inline void pgd_list_del(pgd_t *pgd)
 #define UNSHARED_PTRS_PER_PGD				\
 	(SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)
 #define MAX_UNSHARED_PTRS_PER_PGD			\
-	max_t(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)
+	MAX_T(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)

 static void pgd_set_mm(pgd_t *pgd, struct mm_struct *mm)
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 1522d4aa2ca6..714020e7405a 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -109,8 +109,8 @@ static const u32 knl_interleave_list[] = {
 	0x104, 0x10c, 0x114, 0x11c,   /* 20-23 */
 };
 #define MAX_INTERLEAVE							\
-	(max_t(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
-	       max_t(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
+	(MAX_T(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
+	       MAX_T(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
 		     ARRAY_SIZE(knl_interleave_list))))
 
 struct interleave_pkg {
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index bb14f488c8f6..1ff572d8744e 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -528,7 +528,7 @@ int drm_plane_create_color_properties(struct drm_plane *plane,
 {
 	struct drm_device *dev = plane->dev;
 	struct drm_property *prop;
-	struct drm_prop_enum_list enum_list[max_t(int, DRM_COLOR_ENCODING_MAX,
+	struct drm_prop_enum_list enum_list[MAX_T(int, DRM_COLOR_ENCODING_MAX,
 						       DRM_COLOR_RANGE_MAX)];
 	int i, len;
 
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e9d553eea9cd..8e2b00536c3e 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2536,7 +2536,7 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
 				    unlikely(from_replay) &&
 #endif
 				    ic->internal_hash) {
-					char test_tag[max_t(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+					char test_tag[MAX_T(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 
 					integrity_sector_checksum(ic, sec + ((l - j) << ic->sb->log2_sectors_per_block),
 								  (char *)access_journal_data(ic, i, l), test_tag);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 2478caeec763..21cc8cd9e023 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2805,7 +2805,7 @@ static void stmmac_dma_interrupt(struct stmmac_priv *priv)
 	u32 channels_to_check = tx_channel_count > rx_channel_count ?
 				tx_channel_count : rx_channel_count;
 	u32 chan;
-	int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
+	int status[MAX_T(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
 
 	/* Make sure we never check beyond our status buffer. */
 	if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status)))
diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h
index 3a008f1b9f78..43876fd8a2cb 100644
--- a/fs/erofs/zdata.h
+++ b/fs/erofs/zdata.h
@@ -182,7 +182,7 @@ static inline void z_erofs_onlinepage_endio(struct page *page)
 }
 
 #define Z_EROFS_VMAP_ONSTACK_PAGES	\
-	min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
+	MIN_T(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
 #define Z_EROFS_VMAP_GLOBAL_PAGES	2048
 
 #endif
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 4b9280a3b673..d849f61b7519 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -43,7 +43,7 @@
 #include <net/sock.h>
 #include <net/raw.h>
 
-#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
+#define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX)
 
 /*
  *	Report socket allocation statistics [[email-masked]]
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index d6306aa46bb1..e07c43bd5cb0 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -27,7 +27,7 @@
 #include <net/ipv6.h>
 
 #define MAX4(a, b, c, d) \
-	max_t(u32, max_t(u32, a, b), max_t(u32, c, d))
+	MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d))
 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
 			IPSTATS_MIB_MAX, ICMP_MIB_MAX)
 
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Andy Shevchenko <[email-masked]>, Christophe Leroy
	<[email-masked]>
Subject: [PATCH v3 02/19 5.15.y] minmax: Introduce {min,max}_array()
Date: Wed, 8 Oct 2025 15:29:27 +0000
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From: Herve Codina <[email-masked]>

[ Upstream commit c952c748c7a983a8bda9112984e6f2c1f6e441a5 ]

Introduce min_array() (resp max_array()) in order to get the
minimal (resp maximum) of values present in an array.

Signed-off-by: Herve Codina <[email-masked]>
Reviewed-by: Andy Shevchenko <[email-masked]>
Reviewed-by: Christophe Leroy <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Mark Brown <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index d4bc394b449e..aac0b7d23768 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,6 +168,70 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
+/*
+ * Remove a const qualifier from integer types
+ * _Generic(foo, type-name: association, ..., default: association) performs a
+ * comparison against the foo type (not the qualified type).
+ * Do not use the const keyword in the type-name as it will not match the
+ * unqualified type of foo.
+ */
+#define __unconst_integer_type_cases(type)	\
+	unsigned type:  (unsigned type)0,	\
+	signed type:    (signed type)0
+
+#define __unconst_integer_typeof(x) typeof(			\
+	_Generic((x),						\
+		char: (char)0,					\
+		__unconst_integer_type_cases(char),		\
+		__unconst_integer_type_cases(short),		\
+		__unconst_integer_type_cases(int),		\
+		__unconst_integer_type_cases(long),		\
+		__unconst_integer_type_cases(long long),	\
+		default: (x)))
+
+/*
+ * Do not check the array parameter using __must_be_array().
+ * In the following legit use-case where the "array" passed is a simple pointer,
+ * __must_be_array() will return a failure.
+ * --- 8< ---
+ * int *buff
+ * ...
+ * min = min_array(buff, nb_items);
+ * --- 8< ---
+ *
+ * The first typeof(&(array)[0]) is needed in order to support arrays of both
+ * 'int *buff' and 'int buff[N]' types.
+ *
+ * The array can be an array of const items.
+ * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * to discard the const qualifier for the __element variable.
+ */
+#define __minmax_array(op, array, len) ({				\
+	typeof(&(array)[0]) __array = (array);				\
+	typeof(len) __len = (len);					\
+	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	while (__len--)							\
+		__element = op(__element, __array[__len]);		\
+	__element; })
+
+/**
+ * min_array - return minimum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define min_array(array, len) __minmax_array(min, array, len)
+
+/**
+ * max_array - return maximum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define max_array(array, len) __minmax_array(max, array, len)
+
 /**
  * clamp_t - return a value clamped to a given range using a given type
  * @type: the type of variable to use
-- 
2.47.3

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Subject: [PATCH v3 03/19 5.15.y] minmax: deduplicate __unconst_integer_typeof()
Date: Wed, 8 Oct 2025 15:29:28 +0000
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From: Andy Shevchenko <[email-masked]>

[ Upstream commit 5e57418a2031cd5e1863efdf3d7447a16a368172 ]

It appears that compiler_types.h already have an implementation of the
__unconst_integer_typeof() called __unqual_scalar_typeof().  Use it
instead of the copy.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Andy Shevchenko <[email-masked]>
Acked-by: Herve Codina <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 25 ++-----------------------
 1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index aac0b7d23768..62b0c0a3cf30 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,27 +168,6 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
-/*
- * Remove a const qualifier from integer types
- * _Generic(foo, type-name: association, ..., default: association) performs a
- * comparison against the foo type (not the qualified type).
- * Do not use the const keyword in the type-name as it will not match the
- * unqualified type of foo.
- */
-#define __unconst_integer_type_cases(type)	\
-	unsigned type:  (unsigned type)0,	\
-	signed type:    (signed type)0
-
-#define __unconst_integer_typeof(x) typeof(			\
-	_Generic((x),						\
-		char: (char)0,					\
-		__unconst_integer_type_cases(char),		\
-		__unconst_integer_type_cases(short),		\
-		__unconst_integer_type_cases(int),		\
-		__unconst_integer_type_cases(long),		\
-		__unconst_integer_type_cases(long long),	\
-		default: (x)))
-
 /*
  * Do not check the array parameter using __must_be_array().
  * In the following legit use-case where the "array" passed is a simple pointer,
@@ -203,13 +182,13 @@
  * 'int *buff' and 'int buff[N]' types.
  *
  * The array can be an array of const items.
- * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * typeof() keeps the const qualifier. Use __unqual_scalar_typeof() in order
  * to discard the const qualifier for the __element variable.
  */
 #define __minmax_array(op, array, len) ({				\
 	typeof(&(array)[0]) __array = (array);				\
 	typeof(len) __len = (len);					\
-	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	__unqual_scalar_typeof(__array[0]) __element = __array[--__len];\
 	while (__len--)							\
 		__element = op(__element, __array[__len]);		\
 	__element; })
-- 
2.47.3

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Subject: [PATCH v3 00/19 5.15.y] Backport minmax.h updates from v6.17-rc7
Date: Wed, 8 Oct 2025 15:29:25 +0000
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This series backports 19 patches to update minmax.h in the 5.15.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes.

6.12.y was already backported and changes are part of v6.12.49.
6.6.y was already backported and changes are part of v6.6.109.
6.1.y was already backported and changes are currently in the 6.1-stable
tree.

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in kernel 5.10.y.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Changes in v3:
- Fix fs/erofs/zdata.h in patch 06/19 to use MIN_T instead of min_t to
  fix build on the following patch (07/19):
In file included from ./include/linux/kernel.h:16,
                 from ./include/linux/list.h:9,
                 from ./include/linux/wait.h:7,
                 from ./include/linux/wait_bit.h:8,
                 from ./include/linux/fs.h:6,
                 from fs/erofs/internal.h:10,
                 from fs/erofs/zdata.h:9,
                 from fs/erofs/zdata.c:6:
fs/erofs/zdata.c: In function ‘z_erofs_decompress_pcluster’:
fs/erofs/zdata.h:185:61: error: ISO C90 forbids variable length array ‘pages_onstack’ [-Werror=vla]
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |                                                             ^~~~
./include/linux/minmax.h:49:23: note: in definition of macro ‘__cmp_once_unique’
   49 |         ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
      |                       ^
./include/linux/minmax.h:164:27: note: in expansion of macro ‘__cmp_once’
  164 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
      |                           ^~~~~~~~~~
fs/erofs/zdata.h:185:9: note: in expansion of macro ‘min_t’
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |         ^~~~~
fs/erofs/zdata.c:847:36: note: in expansion of macro ‘Z_EROFS_VMAP_ONSTACK_PAGES’
  847 |         struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES];
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

- Increase test coverage using `make allyesconfig` and
  `make allmodconfig` for arm64, arm, x86_64 and i386 architectures.

Changes in v2:
- Fix the order of patches 6 - 10 according to order in mainline branch.
- Use same style of [ Upstream commit <HASH> ] in all patches.

Andy Shevchenko (1):
  minmax: deduplicate __unconst_integer_typeof()

David Laight (8):
  minmax: fix indentation of __cmp_once() and __clamp_once()
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Herve Codina (1):
  minmax: Introduce {min,max}_array()

Linus Torvalds (8):
  minmax: avoid overly complicated constant expressions in VM code
  minmax: add a few more MIN_T/MAX_T users
  minmax: simplify and clarify min_t()/max_t() implementation
  minmax: make generic MIN() and MAX() macros available everywhere
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: simplify min()/max()/clamp() implementation
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

Matthew Wilcox (Oracle) (1):
  minmax: add in_range() macro

 arch/arm/mm/pageattr.c                        |   6 +-
 arch/um/drivers/mconsole_user.c               |   2 +
 arch/x86/mm/pgtable.c                         |   2 +-
 drivers/edac/sb_edac.c                        |   4 +-
 drivers/edac/skx_common.h                     |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |   2 +
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |   2 +
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    |  14 +-
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |   2 +
 .../drm/arm/display/include/malidp_utils.h    |   2 +-
 .../display/komeda/komeda_pipeline_state.c    |  24 +-
 drivers/gpu/drm/drm_color_mgmt.c              |   2 +-
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |   6 -
 drivers/gpu/drm/radeon/evergreen_cs.c         |   2 +
 drivers/hwmon/adt7475.c                       |  24 +-
 drivers/input/touchscreen/cyttsp4_core.c      |   2 +-
 drivers/irqchip/irq-sun6i-r.c                 |   2 +-
 drivers/md/dm-integrity.c                     |   4 +-
 drivers/media/dvb-frontends/stv0367_priv.h    |   3 +
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   |  18 +-
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   2 +-
 drivers/net/fjes/fjes_main.c                  |   4 +-
 drivers/nfc/pn544/i2c.c                       |   2 -
 drivers/platform/x86/sony-laptop.c            |   1 -
 drivers/scsi/isci/init.c                      |   6 +-
 .../pci/hive_isp_css_include/math_support.h   |   5 -
 drivers/virt/acrn/ioreq.c                     |   4 +-
 fs/btrfs/misc.h                               |   2 -
 fs/btrfs/tree-checker.c                       |   2 +-
 fs/erofs/zdata.h                              |   2 +-
 fs/ext2/balloc.c                              |   2 -
 fs/ext4/ext4.h                                |   2 -
 fs/ufs/util.h                                 |   6 -
 include/linux/compiler.h                      |   9 +
 include/linux/minmax.h                        | 264 +++++++++++++-----
 kernel/trace/preemptirq_delay_test.c          |   2 -
 lib/btree.c                                   |   1 -
 lib/decompress_unlzma.c                       |   2 +
 lib/logic_pio.c                               |   3 -
 lib/vsprintf.c                                |   2 +-
 lib/zstd/zstd_internal.h                      |   2 -
 mm/zsmalloc.c                                 |   1 -
 net/ipv4/proc.c                               |   2 +-
 net/ipv6/proc.c                               |   2 +-
 net/netfilter/nf_nat_core.c                   |   6 +-
 net/tipc/core.h                               |   2 +-
 net/tipc/link.c                               |  10 +-
 tools/testing/selftests/vm/mremap_test.c      |   2 +
 48 files changed, 290 insertions(+), 184 deletions(-)

-- 
2.47.3

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Subject: [PATCH v3 01/19 5.15.y] minmax: add in_range() macro
Date: Wed, 8 Oct 2025 15:29:26 +0000
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From: "Matthew Wilcox (Oracle)" <[email-masked]>

[ Upstream commit f9bff0e31881d03badf191d3b0005839391f5f2b ]

Patch series "New page table range API", v6.

This patchset changes the API used by the MM to set up page table entries.
The four APIs are:

    set_ptes(mm, addr, ptep, pte, nr)
    update_mmu_cache_range(vma, addr, ptep, nr)
    flush_dcache_folio(folio)
    flush_icache_pages(vma, page, nr)

flush_dcache_folio() isn't technically new, but no architecture
implemented it, so I've done that for them.  The old APIs remain around
but are mostly implemented by calling the new interfaces.

The new APIs are based around setting up N page table entries at once.
The N entries belong to the same PMD, the same folio and the same VMA, so
ptep++ is a legitimate operation, and locking is taken care of for you.
Some architectures can do a better job of it than just a loop, but I have
hesitated to make too deep a change to architectures I don't understand
well.

One thing I have changed in every architecture is that PG_arch_1 is now a
per-folio bit instead of a per-page bit when used for dcache clean/dirty
tracking.  This was something that would have to happen eventually, and it
makes sense to do it now rather than iterate over every page involved in a
cache flush and figure out if it needs to happen.

The point of all this is better performance, and Fengwei Yin has measured
improvement on x86.  I suspect you'll see improvement on your architecture
too.  Try the new will-it-scale test mentioned here:
https://lore.kernel.org/linux-mm/[email-masked]/
You'll need to run it on an XFS filesystem and have
CONFIG_TRANSPARENT_HUGEPAGE set.

This patchset is the basis for much of the anonymous large folio work
being done by Ryan, so it's received quite a lot of testing over the last
few months.

This patch (of 38):

Determine if a value lies within a range more efficiently (subtraction +
comparison vs two comparisons and an AND).  It also has useful (under some
circumstances) behaviour if the range exceeds the maximum value of the
type.  Convert all the conflicting definitions of in_range() within the
kernel; some can use the generic definition while others need their own
definition.

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/arm/mm/pageattr.c                        |  6 ++---
 .../drm/arm/display/include/malidp_utils.h    |  2 +-
 .../display/komeda/komeda_pipeline_state.c    | 24 ++++++++---------
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |  6 -----
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   | 18 ++++++-------
 drivers/virt/acrn/ioreq.c                     |  4 +--
 fs/btrfs/misc.h                               |  2 --
 fs/ext2/balloc.c                              |  2 --
 fs/ext4/ext4.h                                |  2 --
 fs/ufs/util.h                                 |  6 -----
 include/linux/minmax.h                        | 27 +++++++++++++++++++
 lib/logic_pio.c                               |  3 ---
 net/netfilter/nf_nat_core.c                   |  6 ++---
 net/tipc/core.h                               |  2 +-
 net/tipc/link.c                               | 10 +++----
 15 files changed, 63 insertions(+), 57 deletions(-)

diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
index 9790ae3a8c68..3b3bfa825fad 100644
--- a/arch/arm/mm/pageattr.c
+++ b/arch/arm/mm/pageattr.c
@@ -25,7 +25,7 @@ static int change_page_range(pte_t *ptep, unsigned long addr, void *data)
 	return 0;
 }
 
-static bool in_range(unsigned long start, unsigned long size,
+static bool range_in_range(unsigned long start, unsigned long size,
 	unsigned long range_start, unsigned long range_end)
 {
 	return start >= range_start && start < range_end &&
@@ -46,8 +46,8 @@ static int change_memory_common(unsigned long addr, int numpages,
 	if (!size)
 		return 0;
 
-	if (!in_range(start, size, MODULES_VADDR, MODULES_END) &&
-	    !in_range(start, size, VMALLOC_START, VMALLOC_END))
+	if (!range_in_range(start, size, MODULES_VADDR, MODULES_END) &&
+	    !range_in_range(start, size, VMALLOC_START, VMALLOC_END))
 		return -EINVAL;
 
 	data.set_mask = set_mask;
diff --git a/drivers/gpu/drm/arm/display/include/malidp_utils.h b/drivers/gpu/drm/arm/display/include/malidp_utils.h
index 49a1d7f3539c..9f83baac6ed8 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_utils.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h
@@ -35,7 +35,7 @@ static inline void set_range(struct malidp_range *rg, u32 start, u32 end)
 	rg->end   = end;
 }
 
-static inline bool in_range(struct malidp_range *rg, u32 v)
+static inline bool malidp_in_range(struct malidp_range *rg, u32 v)
 {
 	return (v >= rg->start) && (v <= rg->end);
 }
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
index c956fda918be..4aa527ca765b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -305,12 +305,12 @@ komeda_layer_check_cfg(struct komeda_layer *layer,
 	if (komeda_fb_check_src_coords(kfb, src_x, src_y, src_w, src_h))
 		return -EINVAL;
 
-	if (!in_range(&layer->hsize_in, src_w)) {
+	if (!malidp_in_range(&layer->hsize_in, src_w)) {
 		DRM_DEBUG_ATOMIC("invalidate src_w %d.\n", src_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&layer->vsize_in, src_h)) {
+	if (!malidp_in_range(&layer->vsize_in, src_h)) {
 		DRM_DEBUG_ATOMIC("invalidate src_h %d.\n", src_h);
 		return -EINVAL;
 	}
@@ -452,14 +452,14 @@ komeda_scaler_check_cfg(struct komeda_scaler *scaler,
 	hsize_out = dflow->out_w;
 	vsize_out = dflow->out_h;
 
-	if (!in_range(&scaler->hsize, hsize_in) ||
-	    !in_range(&scaler->hsize, hsize_out)) {
+	if (!malidp_in_range(&scaler->hsize, hsize_in) ||
+	    !malidp_in_range(&scaler->hsize, hsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid horizontal sizes");
 		return -EINVAL;
 	}
 
-	if (!in_range(&scaler->vsize, vsize_in) ||
-	    !in_range(&scaler->vsize, vsize_out)) {
+	if (!malidp_in_range(&scaler->vsize, vsize_in) ||
+	    !malidp_in_range(&scaler->vsize, vsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid vertical sizes");
 		return -EINVAL;
 	}
@@ -574,13 +574,13 @@ komeda_splitter_validate(struct komeda_splitter *splitter,
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->hsize, dflow->in_w)) {
+	if (!malidp_in_range(&splitter->hsize, dflow->in_w)) {
 		DRM_DEBUG_ATOMIC("split in_w:%d is out of the acceptable range.\n",
 				 dflow->in_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->vsize, dflow->in_h)) {
+	if (!malidp_in_range(&splitter->vsize, dflow->in_h)) {
 		DRM_DEBUG_ATOMIC("split in_h: %d exceeds the acceptable range.\n",
 				 dflow->in_h);
 		return -EINVAL;
@@ -624,13 +624,13 @@ komeda_merger_validate(struct komeda_merger *merger,
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->hsize_merged, output->out_w)) {
+	if (!malidp_in_range(&merger->hsize_merged, output->out_w)) {
 		DRM_DEBUG_ATOMIC("merged_w: %d is out of the accepted range.\n",
 				 output->out_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->vsize_merged, output->out_h)) {
+	if (!malidp_in_range(&merger->vsize_merged, output->out_h)) {
 		DRM_DEBUG_ATOMIC("merged_h: %d is out of the accepted range.\n",
 				 output->out_h);
 		return -EINVAL;
@@ -866,8 +866,8 @@ void komeda_complete_data_flow_cfg(struct komeda_layer *layer,
 	 * input/output range.
 	 */
 	if (dflow->en_scaling && scaler)
-		dflow->en_split = !in_range(&scaler->hsize, dflow->in_w) ||
-				  !in_range(&scaler->hsize, dflow->out_w);
+		dflow->en_split = !malidp_in_range(&scaler->hsize, dflow->in_w) ||
+				  !malidp_in_range(&scaler->hsize, dflow->out_w);
 }
 
 static bool merger_is_available(struct komeda_pipeline *pipe,
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index f1daa923f346..9215322fc915 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -676,12 +676,6 @@ struct block_header {
 	u32 data[];
 };
 
-/* this should be a general kernel helper */
-static int in_range(u32 addr, u32 start, u32 size)
-{
-	return addr >= start && addr < start + size;
-}
-
 static bool fw_block_mem(struct a6xx_gmu_bo *bo, const struct block_header *blk)
 {
 	if (!in_range(blk->addr, bo->iova, bo->size))
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 07568aa15873..3c3d8ffc3c8b 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -2135,7 +2135,7 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
 	.set_link_ksettings = set_link_ksettings,
 };
 
-static int in_range(int val, int lo, int hi)
+static int cxgb_in_range(int val, int lo, int hi)
 {
 	return val < 0 || (val <= hi && val >= lo);
 }
@@ -2171,19 +2171,19 @@ static int cxgb_siocdevprivate(struct net_device *dev,
 			return -EINVAL;
 		if (t.qset_idx >= SGE_QSETS)
 			return -EINVAL;
-		if (!in_range(t.intr_lat, 0, M_NEWTIMER) ||
-		    !in_range(t.cong_thres, 0, 255) ||
-		    !in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
+		if (!cxgb_in_range(t.intr_lat, 0, M_NEWTIMER) ||
+		    !cxgb_in_range(t.cong_thres, 0, 255) ||
+		    !cxgb_in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
 			      MAX_CTRL_TXQ_ENTRIES) ||
-		    !in_range(t.fl_size[0], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[0], MIN_FL_ENTRIES,
 			      MAX_RX_BUFFERS) ||
-		    !in_range(t.fl_size[1], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[1], MIN_FL_ENTRIES,
 			      MAX_RX_JUMBO_BUFFERS) ||
-		    !in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
+		    !cxgb_in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
 			      MAX_RSPQ_ENTRIES))
 			return -EINVAL;
 
diff --git a/drivers/virt/acrn/ioreq.c b/drivers/virt/acrn/ioreq.c
index 80b2e3f0e276..5446e5bbbff8 100644
--- a/drivers/virt/acrn/ioreq.c
+++ b/drivers/virt/acrn/ioreq.c
@@ -356,7 +356,7 @@ static bool handle_cf8cfc(struct acrn_vm *vm,
 	return is_handled;
 }
 
-static bool in_range(struct acrn_ioreq_range *range,
+static bool acrn_in_range(struct acrn_ioreq_range *range,
 		     struct acrn_io_request *req)
 {
 	bool ret = false;
@@ -394,7 +394,7 @@ static struct acrn_ioreq_client *find_ioreq_client(struct acrn_vm *vm,
 	list_for_each_entry(client, &vm->ioreq_clients, list) {
 		read_lock_bh(&client->range_lock);
 		list_for_each_entry(range, &client->range_list, list) {
-			if (in_range(range, req)) {
+			if (acrn_in_range(range, req)) {
 				found = client;
 				break;
 			}
diff --git a/fs/btrfs/misc.h b/fs/btrfs/misc.h
index 340f995652f2..5269923c8a7d 100644
--- a/fs/btrfs/misc.h
+++ b/fs/btrfs/misc.h
@@ -8,8 +8,6 @@
 #include <linux/math64.h>
 #include <linux/rbtree.h>
 
-#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
-
 static inline void cond_wake_up(struct wait_queue_head *wq)
 {
 	/*
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9bf086821eb3..1d9380c5523b 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -36,8 +36,6 @@
  */

-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
 					     unsigned int block_group,
 					     struct buffer_head ** bh)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ed477af15b6b..3e5c91e8b036 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3830,8 +3830,6 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
 	set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
 }
 
-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 /* For ioend & aio unwritten conversion wait queues */
 #define EXT4_WQ_HASH_SZ		37
 #define ext4_ioend_wq(v)   (&ext4__ioend_wq[((unsigned long)(v)) %\
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 4931bec1a01c..89247193d96d 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -11,12 +11,6 @@
 #include <linux/fs.h>
 #include "swab.h"
 
-
-/*
- * some useful macros
- */
-#define in_range(b,first,len)	((b)>=(first)&&(b)<(first)+(len))
-
 /*
  * functions used for retyping
  */
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index dd52969698f7..d4bc394b449e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -5,6 +5,7 @@
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
 #include <linux/const.h>
+#include <linux/types.h>
 
 /*
  * min()/max()/clamp() macros must accomplish three things:
@@ -192,6 +193,32 @@
  */
 #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
+static inline bool in_range64(u64 val, u64 start, u64 len)
+{
+	return (val - start) < len;
+}
+
+static inline bool in_range32(u32 val, u32 start, u32 len)
+{
+	return (val - start) < len;
+}
+
+/**
+ * in_range - Determine if a value lies within a range.
+ * @val: Value to test.
+ * @start: First value in range.
+ * @len: Number of values in range.
+ *
+ * This is more efficient than "if (start <= val && val < (start + len))".
+ * It also gives a different answer if @start + @len overflows the size of
+ * the type by a sufficient amount to encompass @val.  Decide for yourself
+ * which behaviour you want, or prove that start + len never overflow.
+ * Do not blindly replace one form with the other.
+ */
+#define in_range(val, start, len)					\
+	((sizeof(start) | sizeof(len) | sizeof(val)) <= sizeof(u32) ?	\
+		in_range32(val, start, len) : in_range64(val, start, len))
+
 /**
  * swap - swap values of @a and @b
  * @a: first value
diff --git a/lib/logic_pio.c b/lib/logic_pio.c
index 07b4b9a1f54b..2ea564a40064 100644
--- a/lib/logic_pio.c
+++ b/lib/logic_pio.c
@@ -20,9 +20,6 @@
 static LIST_HEAD(io_range_list);
 static DEFINE_MUTEX(io_range_mutex);
 
-/* Consider a kernel general helper for this */
-#define in_range(b, first, len)        ((b) >= (first) && (b) < (first) + (len))
-
 /**
  * logic_pio_register_range - register logical PIO range for a host
  * @new_range: pointer to the IO range to be registered.
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index b776b3af78ca..1dd160b84d05 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -242,7 +242,7 @@ static bool l4proto_in_range(const struct nf_conntrack_tuple *tuple,
 /* If we source map this tuple so reply looks like reply_tuple, will
  * that meet the constraints of range.
  */
-static int in_range(const struct nf_conntrack_tuple *tuple,
+static int nf_in_range(const struct nf_conntrack_tuple *tuple,
 		    const struct nf_nat_range2 *range)
 {
 	/* If we are supposed to map IPs, then we must be in the
@@ -291,7 +291,7 @@ find_appropriate_src(struct net *net,
 				       &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
 			result->dst = tuple->dst;
 
-			if (in_range(result, range))
+			if (nf_in_range(result, range))
 				return 1;
 		}
 	}
@@ -523,7 +523,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
 	if (maniptype == NF_NAT_MANIP_SRC &&
 	    !(range->flags & NF_NAT_RANGE_PROTO_RANDOM_ALL)) {
 		/* try the original tuple first */
-		if (in_range(orig_tuple, range)) {
+		if (nf_in_range(orig_tuple, range)) {
 			if (!nf_nat_used_tuple(orig_tuple, ct)) {
 				*tuple = *orig_tuple;
 				return;
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 0a3f7a70a50a..7eccd97e0609 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -197,7 +197,7 @@ static inline int less(u16 left, u16 right)
 	return less_eq(left, right) && (mod(right) != mod(left));
 }
 
-static inline int in_range(u16 val, u16 min, u16 max)
+static inline int tipc_in_range(u16 val, u16 min, u16 max)
 {
 	return !less(val, min) && !more(val, max);
 }
diff --git a/net/tipc/link.c b/net/tipc/link.c
index b098b74516d1..c8433ec7661d 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1623,7 +1623,7 @@ static int tipc_link_advance_transmq(struct tipc_link *l, struct tipc_link *r,
 					  last_ga->bgack_cnt);
 			}
 			/* Check against the last Gap ACK block */
-			if (in_range(seqno, start, end))
+			if (tipc_in_range(seqno, start, end))
 				continue;
 			/* Update/release the packet peer is acking */
 			bc_has_acked = true;
@@ -2251,12 +2251,12 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		strncpy(if_name, data, TIPC_MAX_IF_NAME);
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own priority if peer's priority is higher */
-		if (in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
+		if (tipc_in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
 			l->priority = peers_prio;
 
 		/* If peer is going down we want full re-establish cycle */
@@ -2299,13 +2299,13 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		l->rcv_nxt_state = msg_seqno(hdr) + 1;
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own prio if peer indicates a different value */
 		if ((peers_prio != l->priority) &&
-		    in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
+		    tipc_in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
 			l->priority = peers_prio;
 			rc = tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
 		}
-- 
2.47.3

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Date: Wed, 8 Oct 2025 14:46:38 +0100
Subject: Re: [PATCH v1] ASoC: soc-pcm: Fix mute and unmute control for
 non-dynamic DAI links
To: Mohammad Rafi Shaik <[email-masked]>,
 Liam Girdwood <[email-masked]>, Mark Brown <[email-masked]>,
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Cc: [email-masked], [email-masked],
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From: Srinivas Kandagatla <[email-masked]>
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On 10/7/25 3:33 AM, Mohammad Rafi Shaik wrote:
> In setups where the same codec DAI is reused across multiple DAI
> links, mute controls via `snd_soc_dai_digital_mute()` is skipped for

Please explain the problem.

> non-dynamic links. The trigger operations are not invoked when
> `dai_link->dynamic == 0`, and mute controls is currently conditioned

I dont think any of the Qualcomm upstream platforms use this flag.

> only on `snd_soc_dai_mute_is_ctrled_at_trigger()`. This patch ensures
> that mute and unmute is applied explicitly for non-dynamic links.
How is this resolving the issue, mute on these codecs happens at trigger
level instead of prepare.

--srini
> 
> Fixes: f0220575e65a ("ASoC: soc-dai: add flag to mute and unmute stream during trigger")
> Cc: [email-masked]
> Signed-off-by: Mohammad Rafi Shaik <[email-masked]>
> ---
>  sound/soc/soc-pcm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
> index 2c21fd528afd..4ed829b49bc2 100644
> --- a/sound/soc/soc-pcm.c
> +++ b/sound/soc/soc-pcm.c
> @@ -949,7 +949,7 @@ static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
>  			SND_SOC_DAPM_STREAM_START);
>  
>  	for_each_rtd_dais(rtd, i, dai) {
> -		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
> +		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
>  			snd_soc_dai_digital_mute(dai, 0, substream->stream);
>  	}
>  
> @@ -1007,7 +1007,7 @@ static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
>  			soc_pcm_set_dai_params(dai, NULL);
>  
>  		if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
> -			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
> +			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
>  				snd_soc_dai_digital_mute(dai, 1, substream->stream);
>  		}
>  	}

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Date: Wed, 8 Oct 2025 21:48:36 +0800
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
To: Finn Thain <[email-masked]>,
 Andrew Morton <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>,
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From: Lance Yang <[email-masked]>
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On 2025/10/8 18:12, Finn Thain wrote:
> 
> On Wed, 8 Oct 2025, Lance Yang wrote:
> 
>>
>> In other words, we are not just fixing the bug reported by Eero and
>> Geert, but correcting the blocker tracking mechanism's flawed assumption
>> for -stable ;)
>>
>> If you feel this doesn't qualify as a fix, I can change the Fixes: tag
>> to point to the original commit that introduced this flawed mechanism
>> instead.
>>
> 
> That's really a question for the bug reporters. I don't personally have a
> problem with CONFIG_DETECT_HUNG_TASK_BLOCKER so I can't say whether the
> fix meets the requirements set in
> Documentation/process/stable-kernel-rules.rst. And I still don't know

I'm a bit confused, as I recall you previously stating that "It's wrong
and should be fixed"[1].

To clarify, is your current position that it should be fixed in general,
but the fix should not be backported to -stable?

If so, then I have nothing further to add to this thread and am happy
to let the maintainer @Andrew decide.

> what's meant by "unnecessary warnings in a few unexpected cases".

The blocker tracking mechanism will trigger a warning when it
encounters any unaligned lock pointer (e.g., from a packed struct). I
don't think that is the expected behavior. Instead, it should simply
skip any unaligned pointer it cannot handle. For the stable kernels,
at least, this is the correct behavior.

[1] 
https://lore.kernel.org/lkml/[email-masked]/

From - Fri Oct 17 14:26:27 2025
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From: Heiko Stuebner <[email-masked]>
To: [email-masked]
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Subject: [PATCH] clk: rockchip: rk3588: Don't change PLL rates when setting dclk_vop2_src
Date: Wed,  8 Oct 2025 15:31:35 +0200
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dclk_vop2_src currently has CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT
flags set, which is vastly different than dclk_vop0_src or dclk_vop1_src,
which have none of those.

With these flags in dclk_vop2_src, actually setting the clock then results
in a lot of other peripherals breaking, because setting the rate results
in the PLL source getting changed:

[   14.898718] clk_core_set_rate_nolock: setting rate for dclk_vop2 to 152840000
[   15.155017] clk_change_rate: setting rate for pll_gpll to 1680000000
[ clk adjusting every gpll user ]

This includes possibly the other vops, i2s, spdif and even the uarts.
Among other possible things, this breaks the uart console on a board
I use. Sometimes it recovers later on, but there will be a big block
of garbled output for a while at least.

Shared PLLs should not be changed by individual users, so drop these
flags from dclk_vop2_src and make the flags the same as on dclk_vop0
and dclk_vop1.

Fixes: f1c506d152ff ("clk: rockchip: add clock controller for the RK3588")
Cc: [email-masked]
Signed-off-by: Heiko Stuebner <[email-masked]>
---
 drivers/clk/rockchip/clk-rk3588.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk-rk3588.c b/drivers/clk/rockchip/clk-rk3588.c
index 1694223f4f84..cf83242d1726 100644
--- a/drivers/clk/rockchip/clk-rk3588.c
+++ b/drivers/clk/rockchip/clk-rk3588.c
@@ -2094,7 +2094,7 @@ static struct rockchip_clk_branch rk3588_early_clk_branches[] __initdata = {
 	COMPOSITE(DCLK_VOP1_SRC, "dclk_vop1_src", gpll_cpll_v0pll_aupll_p, 0,
 			RK3588_CLKSEL_CON(111), 14, 2, MFLAGS, 9, 5, DFLAGS,
 			RK3588_CLKGATE_CON(52), 11, GFLAGS),
-	COMPOSITE(DCLK_VOP2_SRC, "dclk_vop2_src", gpll_cpll_v0pll_aupll_p, CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
+	COMPOSITE(DCLK_VOP2_SRC, "dclk_vop2_src", gpll_cpll_v0pll_aupll_p, 0,
 			RK3588_CLKSEL_CON(112), 5, 2, MFLAGS, 0, 5, DFLAGS,
 			RK3588_CLKGATE_CON(52), 12, GFLAGS),
 	COMPOSITE_NODIV(DCLK_VOP0, "dclk_vop0", dclk_vop0_p,
-- 
2.47.2

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From: Benjamin Tissoires <[email-masked]>
Subject: [PATCH 0/2] HID: multitouch: fix sticky-fingers quirks
Date: Wed, 08 Oct 2025 16:06:57 +0200
To: Jiri Kosina <[email-masked]>, Shuah Khan <[email-masked]>
Cc: Peter Hutterer <[email-masked]>, [email-masked], 
 [email-masked], [email-masked], 
 Benjamin Tissoires <[email-masked]>, [email-masked]
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According to Peter, we've had for a very long time an issue on some
mutltiouch touchpads where the fingers were stuck in a scrolling mode,
or 3 fingers gesture mode. I was unable to debug it because it was
rather hard to reproduce.

Recently, some people raised the issue again on libinput, and this time
added a recording of the actual bug.

It turns out that the sticky finger quirk that was introduced back in
2017 was only checking the last report, and that those missing releases
also happen when moving from 3 to 1 finger (only 1 is released instead
of 2).

This solution seems to me to be the most sensible, because we could also
add the NSMU quirk to win8 multitouch touchpads, but this would involve
a lot more computations at each report for rather annoying corner cases.

Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/1194
Signed-off-by: Benjamin Tissoires <[email-masked]>
---
Benjamin Tissoires (2):
      HID: multitouch: fix sticky fingers
      selftests/hid: add tests for missing release on the Dell Synaptics

 drivers/hid/hid-multitouch.c                       | 27 ++++++-----
 .../testing/selftests/hid/tests/test_multitouch.py | 55 ++++++++++++++++++++++
 2 files changed, 69 insertions(+), 13 deletions(-)
---
base-commit: 54ba6d9b1393a0061600c0e49c8ebef65d60a8b2
change-id: 20250926-fix-sticky-fingers-8ae88436ae82

Best regards,
-- 
Benjamin Tissoires <[email-masked]>

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From: Benjamin Tissoires <[email-masked]>
Date: Wed, 08 Oct 2025 16:06:58 +0200
Subject: [PATCH 1/2] HID: multitouch: fix sticky fingers
To: Jiri Kosina <[email-masked]>, Shuah Khan <[email-masked]>
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The sticky fingers quirk (MT_QUIRK_STICKY_FINGERS) was only considering
the case when slots were not released during the last report.
This can be problematic if the firmware forgets to release a finger
while others are still present.

This was observed on the Synaptics DLL0945 touchpad found on the Dell
XPS 9310 and the Dell Inspiron 5406.

Fixes: 4f4001bc76fd ("HID: multitouch: fix rare Win 8 cases when the touch up event gets missing")
Cc: [email-masked]
Signed-off-by: Benjamin Tissoires <[email-masked]>
---
 drivers/hid/hid-multitouch.c | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 2879e65cf303b1456311ac06115adda5a78a2600..e1a5c7f3a25132094ed643910337474025852b22 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -94,9 +94,8 @@ enum report_mode {
 	TOUCHPAD_REPORT_ALL = TOUCHPAD_REPORT_BUTTONS | TOUCHPAD_REPORT_CONTACTS,
 };
 
-#define MT_IO_FLAGS_RUNNING		0
-#define MT_IO_FLAGS_ACTIVE_SLOTS	1
-#define MT_IO_FLAGS_PENDING_SLOTS	2
+#define MT_IO_SLOTS_MASK		GENMASK(7, 0) /* reserve first 8 bits for slot tracking */
+#define MT_IO_FLAGS_RUNNING		32
 
 static const bool mtrue = true;		/* default for true */
 static const bool mfalse;		/* default for false */
@@ -172,7 +171,11 @@ struct mt_device {
 	struct timer_list release_timer;	/* to release sticky fingers */
 	struct hid_haptic_device *haptic;	/* haptic related configuration */
 	struct hid_device *hdev;	/* hid_device we're attached to */
-	unsigned long mt_io_flags;	/* mt flags (MT_IO_FLAGS_*) */
+	unsigned long mt_io_flags;	/* mt flags (MT_IO_FLAGS_RUNNING)
+					 * first 8 bits are reserved for keeping the slot
+					 * states, this is fine because we only support up
+					 * to 250 slots (MT_MAX_MAXCONTACT)
+					 */
 	__u8 inputmode_value;	/* InputMode HID feature value */
 	__u8 maxcontacts;
 	bool is_buttonpad;	/* is this device a button pad? */
@@ -986,6 +989,7 @@ static void mt_release_pending_palms(struct mt_device *td,
 
 	for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
 		clear_bit(slotnum, app->pending_palm_slots);
+		clear_bit(slotnum, &td->mt_io_flags);
 
 		input_mt_slot(input, slotnum);
 		input_mt_report_slot_inactive(input);
@@ -1019,12 +1023,6 @@ static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
 	app->left_button_state = 0;
 	if (td->is_haptic_touchpad)
 		hid_haptic_pressure_reset(td->haptic);
-
-	if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
-		set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
-	else
-		clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
-	clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 }
 
 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
@@ -1202,7 +1200,9 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input,
 		input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 		input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 
-		set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
+		set_bit(slotnum, &td->mt_io_flags);
+	} else {
+		clear_bit(slotnum, &td->mt_io_flags);
 	}
 
 	return 0;
@@ -1337,7 +1337,7 @@ static void mt_touch_report(struct hid_device *hid,
 	 * defect.
 	 */
 	if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
-		if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
+		if (td->mt_io_flags & MT_IO_SLOTS_MASK)
 			mod_timer(&td->release_timer,
 				  jiffies + msecs_to_jiffies(100));
 		else
@@ -1813,6 +1813,7 @@ static void mt_release_contacts(struct hid_device *hid)
 			for (i = 0; i < mt->num_slots; i++) {
 				input_mt_slot(input_dev, i);
 				input_mt_report_slot_inactive(input_dev);
+				clear_bit(i, &td->mt_io_flags);
 			}
 			input_mt_sync_frame(input_dev);
 			input_sync(input_dev);
@@ -1835,7 +1836,7 @@ static void mt_expired_timeout(struct timer_list *t)
 	 */
 	if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
 		return;
-	if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
+	if (td->mt_io_flags & MT_IO_SLOTS_MASK)
 		mt_release_contacts(hdev);
 	clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
 }

-- 
2.51.0

From - Fri Oct 17 14:26:27 2025
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From: Ard Biesheuvel <[email-masked]>
Date: Wed, 8 Oct 2025 05:44:25 -0700
Subject: Re: [PATCH v2 01/20] arm64: Revert support for generic kernel mode FPU
To: Mark Brown <[email-masked]>
Cc: Ard Biesheuvel <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
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	Eric Biggers <[email-masked]>, [email-masked]
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On Thu, 2 Oct 2025 at 09:23, Mark Brown <[email-masked]> wrote:
>
> On Wed, Oct 01, 2025 at 11:02:03PM +0200, Ard Biesheuvel wrote:
>
> > However, dropping that flag allows the compiler to use FPU and SIMD
> > registers in other ways too, and for this reason, arm64 only permits
> > doing so in strictly controlled contexts, i.e., isolated compilation
> > units that get called from inside a kernel_neon_begin() and
> > kernel_neon_end() pair.
>
> > The users of the generic kernel mode FPU API lack such strict checks,
> > and this may result in userland FP/SIMD state to get corrupted, given
> > that touching FP/SIMD registers outside of a kernel_neon_begin/end pair
> > does not fault, but silently operates on the userland state without
> > preserving it.
>
> Oh dear, that's nasty - I didn't see the patch when it was going in:
>

Actually, there is a check, it just wasn't wired up correctly by the
amdgpu driver, due to the fact that it wraps kernel_fpu_begin()/end()
calls into its own API, which are therefore always made from a
compilation unit where it is supported.

The trick is to #include <linux/fpu.h> into the definition of their
own wrapper API, so that using /that/ from FP/SIMD code also triggers
a build error.

So I'll drop this patch.

From - Fri Oct 17 14:26:27 2025
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From: Christian Hitz <[email-masked]>
To: Lee Jones <[email-masked]>,
	Pavel Machek <[email-masked]>
Cc: Christian Hitz <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH] leds: leds-lp50xx: LP5009 supports 3 modules for a total of 9 LEDs
Date: Wed,  8 Oct 2025 14:50:30 +0200
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From: Christian Hitz <[email-masked]>

Signed-off-by: Christian Hitz <[email-masked]>
Cc: [email-masked]
---
 drivers/leds/leds-lp50xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
index 94f8ef6b482c..05229e2f2e7e 100644
--- a/drivers/leds/leds-lp50xx.c
+++ b/drivers/leds/leds-lp50xx.c
@@ -54,7 +54,7 @@
 /* There are 3 LED outputs per bank */
 #define LP50XX_LEDS_PER_MODULE	3
 
-#define LP5009_MAX_LED_MODULES	2
+#define LP5009_MAX_LED_MODULES	3
 #define LP5012_MAX_LED_MODULES	4
 #define LP5018_MAX_LED_MODULES	6
 #define LP5024_MAX_LED_MODULES	8
-- 
2.51.0

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	Pavel Machek <[email-masked]>
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	[email-masked],
	[email-masked],
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Subject: [PATCH] leds: leds-lp50xx: allow LED 0 to be added to module bank
Date: Wed,  8 Oct 2025 14:32:21 +0200
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From: Christian Hitz <[email-masked]>

led_banks contains LED module number(s) that should be grouped into the
module bank. led_banks is 0-initialized.
By checking the led_banks entries for 0, un-set entries are detected.
But a 0-entry also indicates that LED module 0 should be grouped into the
module bank.

By only iterating over the available entries no check for unused entries
is required and LED module 0 can be added to bank.

Signed-off-by: Christian Hitz <[email-masked]>
Cc: [email-masked]
---
 drivers/leds/leds-lp50xx.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/leds/leds-lp50xx.c b/drivers/leds/leds-lp50xx.c
index 94f8ef6b482c..d50c7f3e8f99 100644
--- a/drivers/leds/leds-lp50xx.c
+++ b/drivers/leds/leds-lp50xx.c
@@ -341,17 +341,15 @@ static int lp50xx_brightness_set(struct led_classdev *cdev,
 	return ret;
 }
 
-static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[])
+static int lp50xx_set_banks(struct lp50xx *priv, u32 led_banks[], int num_leds)
 {
 	u8 led_config_lo, led_config_hi;
 	u32 bank_enable_mask = 0;
 	int ret;
 	int i;
 
-	for (i = 0; i < priv->chip_info->max_modules; i++) {
-		if (led_banks[i])
-			bank_enable_mask |= (1 << led_banks[i]);
-	}
+	for (i = 0; i < num_leds; i++)
+		bank_enable_mask |= (1 << led_banks[i]);
 
 	led_config_lo = bank_enable_mask;
 	led_config_hi = bank_enable_mask >> 8;
@@ -405,7 +403,7 @@ static int lp50xx_probe_leds(struct fwnode_handle *child, struct lp50xx *priv,
 			return ret;
 		}
 
-		ret = lp50xx_set_banks(priv, led_banks);
+		ret = lp50xx_set_banks(priv, led_banks, num_leds);
 		if (ret) {
 			dev_err(priv->dev, "Cannot setup banked LEDs\n");
 			return ret;
-- 
2.51.0

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Date: Wed, 8 Oct 2025 22:00:35 +0900
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Subject: Re: kvm: arm64: stable commit "Fix kernel BUG() due to bad backport
 of FPSIMD/SVE/SME fix" deadlocks host kernel
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On (25/10/08 09:45), Will Deacon wrote:
[..]
> > We found out a similar report at [1], but it doesn't seem like a formal
> > patch was ever posted.  Will, can you please send a formal patch so that
> > stable kernels can run VMs again?
> 
> Yup, already queued up for stable:
> 
> https://lore.kernel.org/r/[email-masked]
> https://lore.kernel.org/r/[email-masked]
> https://lore.kernel.org/r/[email-masked]

Splendid!

> Sorry for the breakage.

No worries!

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Date: Wed, 8 Oct 2025 15:56:20 +0300
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
To: Finn Thain <[email-masked]>,
 Andrew Morton <[email-masked]>,
 Geert Uytterhoeven <[email-masked]>
Cc: Kent Overstreet <[email-masked]>,
 Lance Yang <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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From: Eero Tamminen <[email-masked]>
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Hi,

On 10/8/25 03:40, Finn Thain wrote:
> On Tue, 7 Oct 2025, Andrew Morton wrote:
>> Getting back to the $Subject at hand, are people OK with proceeding
>> with Lance's original fix?
> 
> Lance's patch is probably more appropriate for -stable than the patch I
> proposed -- assuming a fix is needed for -stable.
> 
> Besides those two alternatives, there is also a workaround:
> $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
> which may be acceptable to the interested parties (i.e. m68k users).
> 
> I don't have a preference. I'll leave it up to the bug reporters (Eero and
> Geert).

It's good for me.

	- Eero

From - Fri Oct 17 14:26:27 2025
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From: Haoxiang Li <[email-masked]>
To: [email-masked],
	[email-masked],
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Cc: [email-masked],
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	[email-masked]
Subject: [PATCH] media: mtk-mdp: Fix a reference leak bug in mtk_mdp_remove()
Date: Wed,  8 Oct 2025 17:01:56 +0800
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In mtk_mdp_probe(), vpu_get_plat_device() increases the reference
count of the returned platform device. Add platform_device_put()
to prevent reference leak.

Fixes: c8eb2d7e8202 ("[media] media: Add Mediatek MDP Driver")
Cc: [email-masked]
Signed-off-by: Haoxiang Li <[email-masked]>
---
 drivers/media/platform/mediatek/mdp/mtk_mdp_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
index 80fdc6ff57e0..eb212ca1a083 100644
--- a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
@@ -242,6 +242,7 @@ static void mtk_mdp_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 	vb2_dma_contig_clear_max_seg_size(&pdev->dev);
+	platform_device_put(mdp->vpu_dev);
 	mtk_mdp_unregister_m2m_device(mdp);
 	v4l2_device_unregister(&mdp->v4l2_dev);
 
-- 
2.25.1

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Date: Wed, 8 Oct 2025 21:12:24 +1100 (AEDT)
From: Finn Thain <[email-masked]>
To: Lance Yang <[email-masked]>
cc: Andrew Morton <[email-masked]>, 
    Geert Uytterhoeven <[email-masked]>, 
    Eero Tamminen <[email-masked]>, 
    Kent Overstreet <[email-masked]>, [email-masked], 
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    [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Wed, 8 Oct 2025, Lance Yang wrote:

> 
> In other words, we are not just fixing the bug reported by Eero and 
> Geert, but correcting the blocker tracking mechanism's flawed assumption 
> for -stable ;)
> 
> If you feel this doesn't qualify as a fix, I can change the Fixes: tag 
> to point to the original commit that introduced this flawed mechanism 
> instead.
> 

That's really a question for the bug reporters. I don't personally have a 
problem with CONFIG_DETECT_HUNG_TASK_BLOCKER so I can't say whether the 
fix meets the requirements set in 
Documentation/process/stable-kernel-rules.rst. And I still don't know 
what's meant by "unnecessary warnings in a few unexpected cases".

From - Fri Oct 17 14:26:27 2025
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Date: Wed, 8 Oct 2025 12:20:26 +0200
From: Greg KH <[email-masked]>
To: Vivian Wang <[email-masked]>
Cc: [email-masked], Paul Walmsley <[email-masked]>,
	Palmer Dabbelt <[email-masked]>,
	Albert Ou <[email-masked]>,
	Paul Walmsley <[email-masked]>,
	[email-masked], [email-masked],
	Guo Ren <[email-masked]>, Charlie Jenkins <[email-masked]>,
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	Icenowy Zheng <[email-masked]>, Inochi Amaoto <[email-masked]>,
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Subject: Re: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
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On Wed, Oct 08, 2025 at 03:50:15PM +0800, Vivian Wang wrote:
> Backport of the two riscv mmap patches from master. In effect, these two
> patches removes arch_get_mmap_{base,end} for riscv.

Why is this needed?  What bug does this fix?

thanks,

greg k-h

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On Tegra platforms using ACPI, the SMCCC driver already registers the
SoC device. This makes the registration performed by the Tegra fuse
driver redundant.

When booted via ACPI, skip registering the SoC device and suppress
printing SKU information from the Tegra fuse driver, as this information
is already provided by the SMCCC driver.

Fixes: 972167c69080 ("soc/tegra: fuse: Add ACPI support for Tegra194 and Tegra234")
Cc: [email-masked]
Signed-off-by: Kartik Rajput <[email-masked]>
---
 drivers/soc/tegra/fuse/fuse-tegra.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index d27667283846..74d2fedea71c 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -182,8 +182,6 @@ static int tegra_fuse_probe(struct platform_device *pdev)
 		}
 
 		fuse->soc->init(fuse);
-		tegra_fuse_print_sku_info(&tegra_sku_info);
-		tegra_soc_device_register();
 
 		err = tegra_fuse_add_lookups(fuse);
 		if (err)
-- 
2.43.0

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From: Vivian Wang <[email-masked]>
Subject: [PATCH 6.6.y 0/2] riscv: mm: Backport of mmap hint address fixes
Date: Wed, 08 Oct 2025 15:50:15 +0800
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 Icenowy Zheng <[email-masked]>, Inochi Amaoto <[email-masked]>, 
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Backport of the two riscv mmap patches from master. In effect, these two
patches removes arch_get_mmap_{base,end} for riscv.

Guo Ren: Please take a look. Patch 1 has a slightly non-trivial conflict
with your commit 97b7ac69be2e ("riscv: mm: Fixup compat
arch_get_mmap_end"), which changed STACK_TOP_MAX from TASK_SIZE_64 to
TASK_SIZE when CONFIG_64BIT=y. This shouldn't be a problem, but, well,
just to be safe.

---
Charlie Jenkins (2):
      riscv: mm: Use hint address in mmap if available
      riscv: mm: Do not restrict mmap address based on hint

 arch/riscv/include/asm/processor.h | 33 +++++----------------------------
 1 file changed, 5 insertions(+), 28 deletions(-)
---
base-commit: 60a9e718726fa7019ae00916e4b1c52498da5b60
change-id: 20250917-riscv-mmap-addr-space-6-6-15e7db6b5db6

Best regards,
-- 
Vivian "dramforever" Wang

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From: Vivian Wang <[email-masked]>
Date: Wed, 08 Oct 2025 15:50:17 +0800
Subject: [PATCH 6.6.y 2/2] riscv: mm: Do not restrict mmap address based on
 hint
To: [email-masked], Paul Walmsley <[email-masked]>, 
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Cc: [email-masked], [email-masked], 
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From: Charlie Jenkins <[email-masked]>

[ Upstream commit 2116988d5372aec51f8c4fb85bf8e305ecda47a0 ]

The hint address should not forcefully restrict the addresses returned
by mmap as this causes mmap to report ENOMEM when there is memory still
available.

Signed-off-by: Charlie Jenkins <[email-masked]>
Fixes: b5b4287accd7 ("riscv: mm: Use hint address in mmap if available")
Fixes: add2cc6b6515 ("RISC-V: mm: Restrict address space for sv39,sv48,sv57")
Closes: https://lore.kernel.org/linux-kernel/ZbxTNjQPFKBatMq+@ghost/T/#mccb1890466bf5a488c9ce7441e57e42271895765
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Palmer Dabbelt <[email-masked]>
[ Adjust removed lines ]
Signed-off-by: Vivian Wang <[email-masked]>
Tested-by: Han Gao <[email-masked]>
---
 arch/riscv/include/asm/processor.h | 22 ++--------------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 938aef30dfb42ee477b7c59b5d2afc3871d8004d..4747277983ad1a2a9666c03a4e69758f56d22dbc 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -15,30 +15,12 @@
 
 #define arch_get_mmap_end(addr, len, flags)			\
 ({								\
-	unsigned long mmap_end;					\
-	typeof(addr) _addr = (addr);				\
-	if ((_addr) == 0 ||					\
-	    (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) ||	\
-	    ((_addr + len) > BIT(VA_BITS - 1)))			\
-		mmap_end = STACK_TOP_MAX;			\
-	else							\
-		mmap_end = (_addr + len);			\
-	mmap_end;						\
+	STACK_TOP_MAX;						\
 })
 
 #define arch_get_mmap_base(addr, base)				\
 ({								\
-	unsigned long mmap_base;				\
-	typeof(addr) _addr = (addr);				\
-	typeof(base) _base = (base);				\
-	unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base);	\
-	if ((_addr) == 0 ||					\
-	    (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) ||	\
-	    ((_addr + len) > BIT(VA_BITS - 1)))			\
-		mmap_base = (_base);				\
-	else							\
-		mmap_base = (_addr + len) - rnd_gap;		\
-	mmap_base;						\
+	base;							\
 })
 
 #ifdef CONFIG_64BIT

-- 
2.50.1

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From: Vivian Wang <[email-masked]>
Date: Wed, 08 Oct 2025 15:50:16 +0800
Subject: [PATCH 6.6.y 1/2] riscv: mm: Use hint address in mmap if available
To: [email-masked], Paul Walmsley <[email-masked]>, 
 Palmer Dabbelt <[email-masked]>, Albert Ou <[email-masked]>, 
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Cc: [email-masked], [email-masked], 
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From: Charlie Jenkins <[email-masked]>

[ Upstream commit b5b4287accd702f562a49a60b10dbfaf7d40270f ]

On riscv it is guaranteed that the address returned by mmap is less than
the hint address. Allow mmap to return an address all the way up to
addr, if provided, rather than just up to the lower address space.

This provides a performance benefit as well, allowing mmap to exit after
checking that the address is in range rather than searching for a valid
address.

It is possible to provide an address that uses at most the same number
of bits, however it is significantly more computationally expensive to
provide that number rather than setting the max to be the hint address.
There is the instruction clz/clzw in Zbb that returns the highest set bit
which could be used to performantly implement this, but it would still
be slower than the current implementation. At worst case, half of the
address would not be able to be allocated when a hint address is
provided.

Signed-off-by: Charlie Jenkins <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Palmer Dabbelt <[email-masked]>
[ Adjust TASK_SIZE64 -> TASK_SIZE in moved lines ]
Signed-off-by: Vivian Wang <[email-masked]>
Tested-by: Han Gao <[email-masked]>
---
 arch/riscv/include/asm/processor.h | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h
index 4f6af8c6cfa060380594c6d0e727af6b02d08d70..938aef30dfb42ee477b7c59b5d2afc3871d8004d 100644
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -13,22 +13,16 @@
 
 #include <asm/ptrace.h>
 
-#ifdef CONFIG_64BIT
-#define DEFAULT_MAP_WINDOW	(UL(1) << (MMAP_VA_BITS - 1))
-#define STACK_TOP_MAX		TASK_SIZE
-
 #define arch_get_mmap_end(addr, len, flags)			\
 ({								\
 	unsigned long mmap_end;					\
 	typeof(addr) _addr = (addr);				\
-	if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && is_compat_task())) \
+	if ((_addr) == 0 ||					\
+	    (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) ||	\
+	    ((_addr + len) > BIT(VA_BITS - 1)))			\
 		mmap_end = STACK_TOP_MAX;			\
-	else if ((_addr) >= VA_USER_SV57)			\
-		mmap_end = STACK_TOP_MAX;			\
-	else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= VA_BITS_SV48)) \
-		mmap_end = VA_USER_SV48;			\
 	else							\
-		mmap_end = VA_USER_SV39;			\
+		mmap_end = (_addr + len);			\
 	mmap_end;						\
 })
 
@@ -38,17 +32,18 @@
 	typeof(addr) _addr = (addr);				\
 	typeof(base) _base = (base);				\
 	unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base);	\
-	if ((_addr) == 0 || (IS_ENABLED(CONFIG_COMPAT) && is_compat_task())) \
+	if ((_addr) == 0 ||					\
+	    (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) ||	\
+	    ((_addr + len) > BIT(VA_BITS - 1)))			\
 		mmap_base = (_base);				\
-	else if (((_addr) >= VA_USER_SV57) && (VA_BITS >= VA_BITS_SV57)) \
-		mmap_base = VA_USER_SV57 - rnd_gap;		\
-	else if ((((_addr) >= VA_USER_SV48)) && (VA_BITS >= VA_BITS_SV48)) \
-		mmap_base = VA_USER_SV48 - rnd_gap;		\
 	else							\
-		mmap_base = VA_USER_SV39 - rnd_gap;		\
+		mmap_base = (_addr + len) - rnd_gap;		\
 	mmap_base;						\
 })
 
+#ifdef CONFIG_64BIT
+#define DEFAULT_MAP_WINDOW	(UL(1) << (MMAP_VA_BITS - 1))
+#define STACK_TOP_MAX		TASK_SIZE
 #else
 #define DEFAULT_MAP_WINDOW	TASK_SIZE
 #define STACK_TOP_MAX		TASK_SIZE

-- 
2.50.1

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Date: Wed, 8 Oct 2025 09:45:45 +0100
From: Will Deacon <[email-masked]>
To: Sergey Senozhatsky <[email-masked]>
Cc: Greg Kroah-Hartman <[email-masked]>,
	Catalin Marinas <[email-masked]>,
	Mark Brown <[email-masked]>,
	Mark Rutland <[email-masked]>,
	Tomasz Figa <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: kvm: arm64: stable commit "Fix kernel BUG() due to bad backport
 of FPSIMD/SVE/SME fix" deadlocks host kernel
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On Wed, Oct 08, 2025 at 01:45:32PM +0900, Sergey Senozhatsky wrote:
> Commits 8f4dc4e54eed4 (6.1.y) and 23249dade24e6 (5.15.y) (maybe other
> stable kernels as well) deadlock the host kernel (presumably a
> recursive spinlock):
> 
>  queued_spin_lock_slowpath+0x274/0x358
>  raw_spin_rq_lock_nested+0x2c/0x48
>  _raw_spin_rq_lock_irqsave+0x30/0x4c
>  run_rebalance_domains+0x808/0x2e18
>  __do_softirq+0x104/0x550
>  irq_exit+0x88/0xe0
>  handle_domain_irq+0x7c/0xb0
>  gic_handle_irq+0x1cc/0x420
>  call_on_irq_stack+0x20/0x48
>  do_interrupt_handler+0x3c/0x50
>  el1_interrupt+0x30/0x58
>  el1h_64_irq_handler+0x18/0x24
>  el1h_64_irq+0x7c/0x80
>  kvm_arch_vcpu_ioctl_run+0x24c/0x49c
>  kvm_vcpu_ioctl+0xc4/0x614
> 
> We found out a similar report at [1], but it doesn't seem like a formal
> patch was ever posted.  Will, can you please send a formal patch so that
> stable kernels can run VMs again?

Yup, already queued up for stable:

https://lore.kernel.org/r/[email-masked]
https://lore.kernel.org/r/[email-masked]
https://lore.kernel.org/r/[email-masked]

Sorry for the breakage.

Will

From - Fri Oct 17 14:26:27 2025
Delivery-date: Wed, 08 Oct 2025 08:56:21 +0000
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From: Haoxiang Li <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Haoxiang Li <[email-masked]>,
	[email-masked]
Subject: [PATCH v3] media: mtk-mdp: Fix error handling in probe function
Date: Wed,  8 Oct 2025 16:55:03 +0800
X-CM-TRANSID:_____wDXL7fpJuZoLo0ZCw--.24071S4
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Add mtk_mdp_unregister_m2m_device() on the error handling path to prevent
resource leak.

Add check for the return value of vpu_get_plat_device() to prevent null
pointer dereference. And vpu_get_plat_device() increases the reference
count of the returned platform device. Add platform_device_put() to
prevent reference leak.

Fixes: c8eb2d7e8202 ("[media] media: Add Mediatek MDP Driver")
Cc: [email-masked]
Signed-off-by: Haoxiang Li <[email-masked]>
---
Changes in v3:
- Modify the patch subject and description.
- Patch v2 is a little bit verbose and trivial, so I changed the
  subject and moved the fixes of mtk_mdp_remove to a separate patch.
  Thanks, Nicolas!
Changes in v2:
- Add check for vpu_get_plat_device()
- Add platform_device_put() in mtk_mdp_remove()
- Add mtk_mdp_unregister_m2m_device() on the error handling path.
- Modify the patch title and description. I think you are right.
  Thanks, CJ!
---
 .../media/platform/mediatek/mdp/mtk_mdp_core.c   | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
index 80fdc6ff57e0..f78fa30f1864 100644
--- a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
+++ b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
@@ -194,11 +194,17 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 	}
 
 	mdp->vpu_dev = vpu_get_plat_device(pdev);
+	if (!mdp->vpu_dev) {
+		dev_err(&pdev->dev, "Failed to get vpu device\n");
+		ret = -ENODEV;
+		goto err_vpu_get_dev;
+	}
+
 	ret = vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
 				  VPU_RST_MDP);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register reset handler\n");
-		goto err_m2m_register;
+		goto err_reg_handler;
 	}
 
 	platform_set_drvdata(pdev, mdp);
@@ -206,7 +212,7 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 	ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
-		goto err_m2m_register;
+		goto err_reg_handler;
 	}
 
 	pm_runtime_enable(dev);
@@ -214,6 +220,12 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_reg_handler:
+	platform_device_put(mdp->vpu_dev);
+
+err_vpu_get_dev:
+	mtk_mdp_unregister_m2m_device(mdp);
+
 err_m2m_register:
 	v4l2_device_unregister(&mdp->v4l2_dev);
 
-- 
2.25.1

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Date: Wed, 8 Oct 2025 06:58:54 +0200
From: Greg KH <[email-masked]>
To: pip-izony <[email-masked]>
Cc: Dmitry Torokhov <[email-masked]>,
	Kyungtae Kim <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] Input: pegasus-notetaker - fix out-of-bounds access
 vulnerability in pegasus_parse_packet() function of the pegasus driver
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On Tue, Oct 07, 2025 at 05:41:32PM -0400, pip-izony wrote:
> From: Seungjin Bae <[email-masked]>
> 
> In the pegasus_notetaker driver, the pegasus_probe() function allocates
> the URB transfer buffer using the wMaxPacketSize value from
> the endpoint descriptor. An attacker can use a malicious USB descriptor
> to force the allocation of a very small buffer.
> 
> Subsequently, if the device sends an interrupt packet with a specific
> pattern (e.g., where the first byte is 0x80 or 0x42),
> the pegasus_parse_packet() function parses the packet without checking
> the allocated buffer size. This leads to an out-of-bounds memory access,
> which could result in a system panic.
> 
> Fixes: 948bf18 ("Input: remove third argument of usb_maxpacket()")
> Signed-off-by: Seungjin Bae <[email-masked]>
> ---
>  drivers/input/tablet/pegasus_notetaker.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c
> index 8d6b71d59793..6c4199712a4e 100644
> --- a/drivers/input/tablet/pegasus_notetaker.c
> +++ b/drivers/input/tablet/pegasus_notetaker.c
> @@ -311,6 +311,11 @@ static int pegasus_probe(struct usb_interface *intf,
>  	}
>  
>  	pegasus->data_len = usb_maxpacket(dev, pipe);
> +    if (pegasus->data_len < 5) {
> +		dev_err(&intf->dev, "Invalid number of wMaxPacketSize\n");
> +		error = -EINVAL;
> +		goto err_free_mem;
> +	}
>  
>  	pegasus->data = usb_alloc_coherent(dev, pegasus->data_len, GFP_KERNEL,
>  					   &pegasus->data_dma);
> -- 
> 2.43.0
> 
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

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Date: Wed, 8 Oct 2025 07:54:02 +0200
From: Greg KH <[email-masked]>
To: Jeongjun Park <[email-masked]>
Cc: [email-masked], Takashi Iwai <[email-masked]>,
	[email-masked],
	Clemens Ladisch <[email-masked]>,
	Jaroslav Kysela <[email-masked]>, [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio:
 Kill timer properly at removal
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On Wed, Oct 08, 2025 at 12:58:08AM +0900, Jeongjun Park wrote:
> From: Takashi Iwai <[email-masked]>
> 
> [ Upstream commit 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 ]
> 
> The USB-audio MIDI code initializes the timer, but in a rare case, the
> driver might be freed without the disconnect call.  This leaves the
> timer in an active state while the assigned object is released via
> snd_usbmidi_free(), which ends up with a kernel warning when the debug
> configuration is enabled, as spotted by fuzzer.
> 
> For avoiding the problem, put timer_shutdown_sync() at
> snd_usbmidi_free(), so that the timer can be killed properly.
> While we're at it, replace the existing timer_delete_sync() at the
> disconnect callback with timer_shutdown_sync(), too.
> 
> Reported-by: [email-masked]
> Closes: https://lore.kernel.org/[email-masked]
> Cc: <[email-masked]>
> Link: https://patch.msgid.link/[email-masked]
> Signed-off-by: Takashi Iwai <[email-masked]>
> [ del_timer vs timer_delete differences ]
> Signed-off-by: Jeongjun Park <[email-masked]>
> ---
>  sound/usb/midi.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/usb/midi.c b/sound/usb/midi.c
> index a792ada18863..c3de2b137435 100644
> --- a/sound/usb/midi.c
> +++ b/sound/usb/midi.c
> @@ -1530,6 +1530,7 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
>  			snd_usbmidi_in_endpoint_delete(ep->in);
>  	}
>  	mutex_destroy(&umidi->mutex);
> +	timer_shutdown_sync(&umidi->error_timer);

This function is not in older kernel versions, you did not test this
build :(

I've applied this to 6.6.y and newer, but for 6.1.y and older, please
use the proper function.

thanks,

greg k-h

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Feedback-ID: i58a146ae:Fastmail
Date: Wed, 8 Oct 2025 17:14:51 +1100 (AEDT)
From: Finn Thain <[email-masked]>
To: Lance Yang <[email-masked]>
cc: Andrew Morton <[email-masked]>, 
    Geert Uytterhoeven <[email-masked]>, 
    Eero Tamminen <[email-masked]>, 
    Kent Overstreet <[email-masked]>, [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Wed, 8 Oct 2025, Lance Yang wrote:

> On 2025/10/8 08:40, Finn Thain wrote:
> > 
> > On Tue, 7 Oct 2025, Andrew Morton wrote:
> > 
> >> Getting back to the $Subject at hand, are people OK with proceeding
> >> with Lance's original fix?
> >>
> > 
> > Lance's patch is probably more appropriate for -stable than the patch I
> > proposed -- assuming a fix is needed for -stable.
> 
> Thanks!
> 
> Apart from that, I believe this fix is still needed for the hung task 
> detector itself, to prevent unnecessary warnings in a few unexpected 
> cases.
> 

Can you be more specific about those cases? A fix for a theoretical bug 
doesn't qualify for -stable branches. But if it's a fix for a real bug, I 
have misunderstood Andrew's question...

> > 
> > Besides those two alternatives, there is also a workaround:
> > $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
> > which may be acceptable to the interested parties (i.e. m68k users).
> > 
> > I don't have a preference. I'll leave it up to the bug reporters (Eero 
> > and Geert).
> 

From - Fri Oct 17 14:26:27 2025
Delivery-date: Wed, 08 Oct 2025 07:10:14 +0000
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Date: Wed, 8 Oct 2025 15:09:43 +0800
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
To: Finn Thain <[email-masked]>
Cc: Andrew Morton <[email-masked]>,
 Geert Uytterhoeven <[email-masked]>, Eero Tamminen
 <[email-masked]>, Kent Overstreet <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked]
From: Lance Yang <[email-masked]>
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On 2025/10/8 14:14, Finn Thain wrote:
> 
> On Wed, 8 Oct 2025, Lance Yang wrote:
> 
>> On 2025/10/8 08:40, Finn Thain wrote:
>>>
>>> On Tue, 7 Oct 2025, Andrew Morton wrote:
>>>
>>>> Getting back to the $Subject at hand, are people OK with proceeding
>>>> with Lance's original fix?
>>>>
>>>
>>> Lance's patch is probably more appropriate for -stable than the patch I
>>> proposed -- assuming a fix is needed for -stable.
>>
>> Thanks!
>>
>> Apart from that, I believe this fix is still needed for the hung task
>> detector itself, to prevent unnecessary warnings in a few unexpected
>> cases.
>>
> 
> Can you be more specific about those cases? A fix for a theoretical bug
> doesn't qualify for -stable branches. But if it's a fix for a real bug, I
> have misunderstood Andrew's question...

I believe it is a real bug, as it was reported by Eero and Geert[1].

The blocker tracking mechanism in -stable assumes that lock pointers
are at least 4-byte aligned. As I mentioned previously[2], this
assumption fails for packed structs on architectures that don't trap
on unaligned access.

Of course, we could always improve the mechanism to not make
assumptions. But for -stable, this fix completely resolves the issue
by ignoring any unaligned pointer, whatever the cause (e.g., packed
structs, non-native alignment, etc.).

So we can all sleep well at night again :)

[1] 
https://lore.kernel.org/lkml/[email-masked]/
[2] 
https://lore.kernel.org/lkml/[email-masked]/

> 
>>>
>>> Besides those two alternatives, there is also a workaround:
>>> $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
>>> which may be acceptable to the interested parties (i.e. m68k users).
>>>
>>> I don't have a preference. I'll leave it up to the bug reporters (Eero
>>> and Geert).
>>

From - Fri Oct 17 14:26:27 2025
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Date: Wed, 8 Oct 2025 15:23:05 +0800
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
From: Lance Yang <[email-masked]>
To: Finn Thain <[email-masked]>
Cc: Andrew Morton <[email-masked]>,
 Geert Uytterhoeven <[email-masked]>, Eero Tamminen
 <[email-masked]>, Kent Overstreet <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked]
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On 2025/10/8 15:09, Lance Yang wrote:
> 
> 
> On 2025/10/8 14:14, Finn Thain wrote:
>>
>> On Wed, 8 Oct 2025, Lance Yang wrote:
>>
>>> On 2025/10/8 08:40, Finn Thain wrote:
>>>>
>>>> On Tue, 7 Oct 2025, Andrew Morton wrote:
>>>>
>>>>> Getting back to the $Subject at hand, are people OK with proceeding
>>>>> with Lance's original fix?
>>>>>
>>>>
>>>> Lance's patch is probably more appropriate for -stable than the patch I
>>>> proposed -- assuming a fix is needed for -stable.
>>>
>>> Thanks!
>>>
>>> Apart from that, I believe this fix is still needed for the hung task
>>> detector itself, to prevent unnecessary warnings in a few unexpected
>>> cases.
>>>
>>
>> Can you be more specific about those cases? A fix for a theoretical bug
>> doesn't qualify for -stable branches. But if it's a fix for a real bug, I
>> have misunderstood Andrew's question...
> 
> I believe it is a real bug, as it was reported by Eero and Geert[1].
> 
> The blocker tracking mechanism in -stable assumes that lock pointers
> are at least 4-byte aligned. As I mentioned previously[2], this
> assumption fails for packed structs on architectures that don't trap
> on unaligned access.
> 
> Of course, we could always improve the mechanism to not make
> assumptions. But for -stable, this fix completely resolves the issue
> by ignoring any unaligned pointer, whatever the cause (e.g., packed
> structs, non-native alignment, etc.).
> 
> So we can all sleep well at night again :)
> 
> [1] https://lore.kernel.org/lkml/ 
> [email-masked]/
> [2] https://lore.kernel.org/lkml/cfb62b9d-9cbd-47dd- 
> [email-masked]/

Forgot to add:

In other words, we are not just fixing the bug reported by Eero
and Geert, but correcting the blocker tracking mechanism's flawed
assumption for -stable ;)

If you feel this doesn't qualify as a fix, I can change the Fixes:
tag to point to the original commit that introduced this flawed
mechanism instead.

> 
>>
>>>>
>>>> Besides those two alternatives, there is also a workaround:
>>>> $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
>>>> which may be acceptable to the interested parties (i.e. m68k users).
>>>>
>>>> I don't have a preference. I'll leave it up to the bug reporters (Eero
>>>> and Geert).
>>>
> 

From - Fri Oct 17 14:26:27 2025
Delivery-date: Wed, 08 Oct 2025 03:20:46 +0000
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Date: Wed, 8 Oct 2025 11:20:03 +0800
From: Shuhao Fu <[email-masked]>
To: Lyude Paul <[email-masked]>, Danilo Krummrich <[email-masked]>
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked]
Subject: [PATCH v3] drm/nouveau: Fix refcount leak in nouveau_connector_detect
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A possible inconsistent refcount update has been identified in function
`nouveau_connector_detect`, which may cause a resource leak.

After calling `pm_runtime_get_*(dev->dev)`, the usage counter of `dev->dev`
gets increased. In case function `nvif_outp_edid_get` returns negative,
function `nouveau_connector_detect` returns without decreasing the usage
counter of `dev->dev`, causing a refcount inconsistency.

Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/450
Fixes: 0cd7e0718139 ("drm/nouveau/disp: add output method to fetch edid")
Signed-off-by: Shuhao Fu <[email-masked]>
Cc: [email-masked]

Change in v3:
- Cc stable
Change in v2:
- Add "Fixes" and "Cc" tags
---
 drivers/gpu/drm/nouveau/nouveau_connector.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 63621b151..45caccade 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -600,8 +600,10 @@ nouveau_connector_detect(struct drm_connector *connector, bool force)
                                new_edid = drm_get_edid(connector, nv_encoder->i2c);
                } else {
                        ret = nvif_outp_edid_get(&nv_encoder->outp, (u8 **)&new_edid);
-                       if (ret < 0)
-                               return connector_status_disconnected;
+                       if (ret < 0) {
+                               conn_status = connector_status_disconnected;
+                               goto out;
+                       }
                }

                nouveau_connector_set_edid(nv_connector, new_edid);
--
2.39.5

From - Fri Oct 17 14:26:27 2025
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From: Gui-Dong Han <[email-masked]>
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	[email-masked],
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	[email-masked]
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	[email-masked],
	Gui-Dong Han <[email-masked]>,
	[email-masked]
Subject: [PATCH] drm/amdgpu: use atomic functions with memory barriers for vm fault info
Date: Wed,  8 Oct 2025 03:43:27 +0000
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The atomic variable vm_fault_info_updated is used to synchronize access to
adev->gmc.vm_fault_info between the interrupt handler and
get_vm_fault_info().

The default atomic functions like atomic_set() and atomic_read() do not
provide memory barriers. This allows for CPU instruction reordering,
meaning the memory accesses to vm_fault_info and the vm_fault_info_updated
flag are not guaranteed to occur in the intended order. This creates a
race condition that can lead to inconsistent or stale data being used.

The previous implementation, which used an explicit mb(), was incomplete
and inefficient. It failed to account for all potential CPU reorderings,
such as the access of vm_fault_info being reordered before the atomic_read
of the flag. This approach is also more verbose and less performant than
using the proper atomic functions with acquire/release semantics.

Fix this by switching to atomic_set_release() and atomic_read_acquire().
These functions provide the necessary acquire and release semantics,
which act as memory barriers to ensure the correct order of operations.
It is also more efficient and idiomatic than using explicit full memory
barriers.

Fixes: b97dfa27ef3a ("drm/amdgpu: save vm fault information for amdkfd")
Cc: [email-masked]
Signed-off-by: Gui-Dong Han <[email-masked]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 5 ++---
 drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c            | 7 +++----
 drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c            | 7 +++----
 3 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index b16cce7c22c3..ac09bbe51634 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2325,10 +2325,9 @@ void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct kgd_mem *mem)
 int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct amdgpu_device *adev,
 					  struct kfd_vm_fault_info *mem)
 {
-	if (atomic_read(&adev->gmc.vm_fault_info_updated) == 1) {
+	if (atomic_read_acquire(&adev->gmc.vm_fault_info_updated) == 1) {
 		*mem = *adev->gmc.vm_fault_info;
-		mb(); /* make sure read happened */
-		atomic_set(&adev->gmc.vm_fault_info_updated, 0);
+		atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
 	}
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index a8d5795084fc..cf30d3332050 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -1066,7 +1066,7 @@ static int gmc_v7_0_sw_init(struct amdgpu_ip_block *ip_block)
 					GFP_KERNEL);
 	if (!adev->gmc.vm_fault_info)
 		return -ENOMEM;
-	atomic_set(&adev->gmc.vm_fault_info_updated, 0);
+	atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
 
 	return 0;
 }
@@ -1288,7 +1288,7 @@ static int gmc_v7_0_process_interrupt(struct amdgpu_device *adev,
 	vmid = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
 			     VMID);
 	if (amdgpu_amdkfd_is_kfd_vmid(adev, vmid)
-		&& !atomic_read(&adev->gmc.vm_fault_info_updated)) {
+		&& !atomic_read_acquire(&adev->gmc.vm_fault_info_updated)) {
 		struct kfd_vm_fault_info *info = adev->gmc.vm_fault_info;
 		u32 protections = REG_GET_FIELD(status,
 					VM_CONTEXT1_PROTECTION_FAULT_STATUS,
@@ -1304,8 +1304,7 @@ static int gmc_v7_0_process_interrupt(struct amdgpu_device *adev,
 		info->prot_read = protections & 0x8 ? true : false;
 		info->prot_write = protections & 0x10 ? true : false;
 		info->prot_exec = protections & 0x20 ? true : false;
-		mb();
-		atomic_set(&adev->gmc.vm_fault_info_updated, 1);
+		atomic_set_release(&adev->gmc.vm_fault_info_updated, 1);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index b45fa0cea9d2..0d4c93ff6f74 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -1179,7 +1179,7 @@ static int gmc_v8_0_sw_init(struct amdgpu_ip_block *ip_block)
 					GFP_KERNEL);
 	if (!adev->gmc.vm_fault_info)
 		return -ENOMEM;
-	atomic_set(&adev->gmc.vm_fault_info_updated, 0);
+	atomic_set_release(&adev->gmc.vm_fault_info_updated, 0);
 
 	return 0;
 }
@@ -1474,7 +1474,7 @@ static int gmc_v8_0_process_interrupt(struct amdgpu_device *adev,
 	vmid = REG_GET_FIELD(status, VM_CONTEXT1_PROTECTION_FAULT_STATUS,
 			     VMID);
 	if (amdgpu_amdkfd_is_kfd_vmid(adev, vmid)
-		&& !atomic_read(&adev->gmc.vm_fault_info_updated)) {
+		&& !atomic_read_acquire(&adev->gmc.vm_fault_info_updated)) {
 		struct kfd_vm_fault_info *info = adev->gmc.vm_fault_info;
 		u32 protections = REG_GET_FIELD(status,
 					VM_CONTEXT1_PROTECTION_FAULT_STATUS,
@@ -1490,8 +1490,7 @@ static int gmc_v8_0_process_interrupt(struct amdgpu_device *adev,
 		info->prot_read = protections & 0x8 ? true : false;
 		info->prot_write = protections & 0x10 ? true : false;
 		info->prot_exec = protections & 0x20 ? true : false;
-		mb();
-		atomic_set(&adev->gmc.vm_fault_info_updated, 1);
+		atomic_set_release(&adev->gmc.vm_fault_info_updated, 1);
 	}
 
 	return 0;
-- 
2.25.1

From - Fri Oct 17 14:26:27 2025
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Date: Wed, 8 Oct 2025 05:51:52 +0200
Subject: Re: [PATCH v2] Bluetooth: bfusb: Fix buffer over-read in rx
 processing loop
To: Seungjin Bae <[email-masked]>
Cc: Marcel Holtmann <[email-masked]>,
 Kyungtae Kim <[email-masked]>,
 Luiz Augusto von Dentz <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
From: Paul Menzel <[email-masked]>
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                             [URIs: checkpatch.pl]
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Dear Seungjin,

Thank you for the patch.

Am 08.10.25 um 03:56 schrieb pip-izony:
> From: Seungjin Bae <[email-masked]>
> 
> The bfusb_rx_complete() function parses incoming URB data in while loop.

… in *a* while loop.

> The logic does not sufficiently validate the remaining buffer size(count)
> accross loop iterations, which can lead to a buffer over-read.

across

> For example, with 4-bytes remaining buffer, if the first iteration takes
> the `hdr & 0x4000` branch, 2-bytes are consumed. On the next iteration,
> only 2-bytes remain, but the else branch is trying to access the third
> byte(buf[2]). This causes an out-of-bounds read and a potential kernel panic.

Please re-flow for 75 characters per line.

> This patch fixes the vulnerability by adding checks to ensure enough
> data remains in the buffer before it is accessed.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Seungjin Bae <[email-masked]>
> ---
>   v1 -> v2: Fixing the error function name
>   
>   drivers/bluetooth/bfusb.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
> index 8df310983bf6..45f4ec5b6860 100644
> --- a/drivers/bluetooth/bfusb.c
> +++ b/drivers/bluetooth/bfusb.c
> @@ -360,6 +360,10 @@ static void bfusb_rx_complete(struct urb *urb)
>   			count -= 2;
>   			buf   += 2;
>   		} else {
> +            if (count < 3) {
> +                bt_dev_err(data->hdev, "block header is too short");

Please print count and 3.

> +                break;
> +            }

Please use tabs for alignment. `scripts/checkpatch.pl` should have 
warned about this.

>   			len = (buf[2] == 0) ? 256 : buf[2];
>   			count -= 3;
>   			buf   += 3;

Kind regards,

Paul

From - Fri Oct 17 14:26:27 2025
Delivery-date: Wed, 08 Oct 2025 04:45:45 +0000
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Date: Wed, 8 Oct 2025 13:45:32 +0900
From: Sergey Senozhatsky <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>, 
	Will Deacon <[email-masked]>
Cc: Catalin Marinas <[email-masked]>, 
	Mark Brown <[email-masked]>, Mark Rutland <[email-masked]>, 
	Tomasz Figa <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
	Sergey Senozhatsky <[email-masked]>
Subject: kvm: arm64: stable commit "Fix kernel BUG() due to bad backport of
 FPSIMD/SVE/SME fix" deadlocks host kernel
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Commits 8f4dc4e54eed4 (6.1.y) and 23249dade24e6 (5.15.y) (maybe other
stable kernels as well) deadlock the host kernel (presumably a
recursive spinlock):

 queued_spin_lock_slowpath+0x274/0x358
 raw_spin_rq_lock_nested+0x2c/0x48
 _raw_spin_rq_lock_irqsave+0x30/0x4c
 run_rebalance_domains+0x808/0x2e18
 __do_softirq+0x104/0x550
 irq_exit+0x88/0xe0
 handle_domain_irq+0x7c/0xb0
 gic_handle_irq+0x1cc/0x420
 call_on_irq_stack+0x20/0x48
 do_interrupt_handler+0x3c/0x50
 el1_interrupt+0x30/0x58
 el1h_64_irq_handler+0x18/0x24
 el1h_64_irq+0x7c/0x80
 kvm_arch_vcpu_ioctl_run+0x24c/0x49c
 kvm_vcpu_ioctl+0xc4/0x614

We found out a similar report at [1], but it doesn't seem like a formal
patch was ever posted.  Will, can you please send a formal patch so that
stable kernels can run VMs again?

[1] https://lists.linaro.org/archives/list/[email-masked]/thread/3FQHC4GVN57SM2CNST3EMVEBUXMSFOGR/#AQB4LMHLGTUO73GVCVV5QLCEJT3MRTN4

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Date: Wed, 8 Oct 2025 06:58:22 +0200
From: Greg KH <[email-masked]>
To: pip-izony <[email-masked]>
Cc: Marcel Holtmann <[email-masked]>,
	Kyungtae Kim <[email-masked]>,
	Luiz Augusto von Dentz <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] Bluetooth: bfusb: Fix buffer over-read in rx processing
 loop
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On Tue, Oct 07, 2025 at 07:29:42PM -0400, pip-izony wrote:
> From: Seungjin Bae <[email-masked]>
> 
> The bfusb_rx_complete() function parses incoming URB data in while loop.
> The logic does not sufficiently validate the remaining buffer size(count)
> accross loop iterations, which can lead to a buffer over-read.
> 
> For example, with 4-bytes remaining buffer, if the first iteration takes
> the `hdr & 0x4000` branch, 2-bytes are consumed. On the next iteration,
> only 2-bytes remain, but the else branch is trying to access the third
> byte(buf[2]). This causes an out-of-bounds read and a potential kernel panic.
> 
> This patch fixes the vulnerability by adding checks to ensure enough
> data remains in the buffer before it is accessed.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Seungjin Bae <[email-masked]>
> ---
>  drivers/bluetooth/bfusb.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
> index 8df310983bf6..f17eae6dbd7d 100644
> --- a/drivers/bluetooth/bfusb.c
> +++ b/drivers/bluetooth/bfusb.c
> @@ -360,6 +360,10 @@ static void bfusb_rx_complete(struct urb *urb)
>  			count -= 2;
>  			buf   += 2;
>  		} else {
> +            if (count < 3) {
> +                bf_dev_err(data->hdev, "block header is too short");
> +                break;
> +            }
>  			len = (buf[2] == 0) ? 256 : buf[2];
>  			count -= 3;
>  			buf   += 3;
> -- 
> 2.43.0
> 
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

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From: Nhat Pham <[email-masked]>
Date: Tue, 7 Oct 2025 16:52:43 -0700
Subject: Re: [PATCH 1/4] mm, swap: do not perform synchronous discard during allocation
To: Kairui Song <[email-masked]>
Cc: [email-masked], Andrew Morton <[email-masked]>, 
	Kemeng Shi <[email-masked]>, Kairui Song <[email-masked]>, 
	Baoquan He <[email-masked]>, Barry Song <[email-masked]>, Chris Li <[email-masked]>, 
	Baolin Wang <[email-masked]>, David Hildenbrand <[email-masked]>, 
	"Matthew Wilcox (Oracle)" <[email-masked]>, Ying Huang <[email-masked]>, 
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On Mon, Oct 6, 2025 at 1:03=E2=80=AFPM Kairui Song <[email-masked]> wrote=
:
>
> From: Kairui Song <[email-masked]>
>
> Since commit 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation
> fast path"), swap allocation is protected by a local lock, which means
> we can't do any sleeping calls during allocation.
>
> However, the discard routine is not taken well care of. When the swap
> allocator failed to find any usable cluster, it would look at the
> pending discard cluster and try to issue some blocking discards. It may
> not necessarily sleep, but the cond_resched at the bio layer indicates
> this is wrong when combined with a local lock. And the bio GFP flag used
> for discard bio is also wrong (not atomic).
>
> It's arguable whether this synchronous discard is helpful at all. In
> most cases, the async discard is good enough. And the swap allocator is
> doing very differently at organizing the clusters since the recent
> change, so it is very rare to see discard clusters piling up.
>
> So far, no issues have been observed or reported with typical SSD setups
> under months of high pressure. This issue was found during my code
> review. But by hacking the kernel a bit: adding a mdelay(100) in the
> async discard path, this issue will be observable with WARNING triggered
> by the wrong GFP and cond_resched in the bio layer.
>
> So let's fix this issue in a safe way: remove the synchronous discard in
> the swap allocation path. And when order 0 is failing with all cluster
> list drained on all swap devices, try to do a discard following the swap
> device priority list. If any discards released some cluster, try the
> allocation again. This way, we can still avoid OOM due to swap failure
> if the hardware is very slow and memory pressure is extremely high.
>
> Cc: <[email-masked]>
> Fixes: 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation fast pa=
th")
> Signed-off-by: Kairui Song <[email-masked]>
> ---

Seems reasonable to me.

Acked-by: Nhat Pham <[email-masked]>

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Feedback-ID: i58a146ae:Fastmail
Date: Wed, 8 Oct 2025 11:40:09 +1100 (AEDT)
From: Finn Thain <[email-masked]>
To: Andrew Morton <[email-masked]>, 
    Geert Uytterhoeven <[email-masked]>, 
    Eero Tamminen <[email-masked]>
cc: Kent Overstreet <[email-masked]>, 
    Lance Yang <[email-masked]>, [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked], [email-masked], [email-masked], 
    [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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On Tue, 7 Oct 2025, Andrew Morton wrote:

> 
> Getting back to the $Subject at hand, are people OK with proceeding
> with Lance's original fix?
> 

Lance's patch is probably more appropriate for -stable than the patch I 
proposed -- assuming a fix is needed for -stable.

Besides those two alternatives, there is also a workaround:
$ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
which may be acceptable to the interested parties (i.e. m68k users).

I don't have a preference. I'll leave it up to the bug reporters (Eero and 
Geert).

From - Fri Oct 17 14:26:27 2025
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From: pip-izony <[email-masked]>
To: Marcel Holtmann <[email-masked]>
Cc: Seungjin Bae <[email-masked]>,
	Kyungtae Kim <[email-masked]>,
	Luiz Augusto von Dentz <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH v2] Bluetooth: bfusb: Fix buffer over-read in rx processing loop
Date: Tue,  7 Oct 2025 21:56:41 -0400
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From: Seungjin Bae <[email-masked]>

The bfusb_rx_complete() function parses incoming URB data in while loop.
The logic does not sufficiently validate the remaining buffer size(count)
accross loop iterations, which can lead to a buffer over-read.

For example, with 4-bytes remaining buffer, if the first iteration takes
the `hdr & 0x4000` branch, 2-bytes are consumed. On the next iteration,
only 2-bytes remain, but the else branch is trying to access the third
byte(buf[2]). This causes an out-of-bounds read and a potential kernel panic.

This patch fixes the vulnerability by adding checks to ensure enough
data remains in the buffer before it is accessed.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Seungjin Bae <[email-masked]>
---
 v1 -> v2: Fixing the error function name
 
 drivers/bluetooth/bfusb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
index 8df310983bf6..45f4ec5b6860 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -360,6 +360,10 @@ static void bfusb_rx_complete(struct urb *urb)
 			count -= 2;
 			buf   += 2;
 		} else {
+            if (count < 3) {
+                bt_dev_err(data->hdev, "block header is too short");
+                break;
+            }
 			len = (buf[2] == 0) ? 256 : buf[2];
 			count -= 3;
 			buf   += 3;
-- 
2.43.0

From - Fri Oct 17 14:26:27 2025
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Date: Wed, 8 Oct 2025 11:03:18 +0800
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
To: Finn Thain <[email-masked]>,
 Andrew Morton <[email-masked]>,
 Geert Uytterhoeven <[email-masked]>, Eero Tamminen <[email-masked]>
Cc: Kent Overstreet <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked]
From: Lance Yang <[email-masked]>
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On 2025/10/8 08:40, Finn Thain wrote:
> 
> On Tue, 7 Oct 2025, Andrew Morton wrote:
> 
>>
>> Getting back to the $Subject at hand, are people OK with proceeding
>> with Lance's original fix?
>>
> 
> Lance's patch is probably more appropriate for -stable than the patch I
> proposed -- assuming a fix is needed for -stable.

Thanks!

Apart from that, I believe this fix is still needed for the hung task
detector itself, to prevent unnecessary warnings in a few unexpected
cases.

> 
> Besides those two alternatives, there is also a workaround:
> $ ./scripts/config -d DETECT_HUNG_TASK_BLOCKER
> which may be acceptable to the interested parties (i.e. m68k users).
> 
> I don't have a preference. I'll leave it up to the bug reporters (Eero and
> Geert).

From - Fri Oct 17 14:26:27 2025
Delivery-date: Tue, 07 Oct 2025 20:56:10 +0000
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Date: Tue, 7 Oct 2025 13:56:00 -0700
From: Andrew Morton <[email-masked]>
To: Kent Overstreet <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>, Finn Thain
 <[email-masked]>, Lance Yang <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock
 pointers
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Getting back to the $Subject at hand, are people OK with proceeding
with Lance's original fix?

From: Lance Yang <[email-masked]>
Subject: hung_task: fix warnings caused by unaligned lock pointers
Date: Tue, 9 Sep 2025 22:52:43 +0800

From: Lance Yang <[email-masked]>

The blocker tracking mechanism assumes that lock pointers are at least
4-byte aligned to use their lower bits for type encoding.

However, as reported by Eero Tamminen, some architectures like m68k
only guarantee 2-byte alignment of 32-bit values. This breaks the
assumption and causes two related WARN_ON_ONCE checks to trigger.

To fix this, the runtime checks are adjusted to silently ignore any lock
that is not 4-byte aligned, effectively disabling the feature in such
cases and avoiding the related warnings.

Thanks to Geert Uytterhoeven for bisecting!

Link: https://lkml.kernel.org/r/[email-masked]
Fixes: e711faaafbe5 ("hung_task: replace blocker_mutex with encoded blocker")
Signed-off-by: Lance Yang <[email-masked]>
Reported-by: Eero Tamminen <[email-masked]>
Closes: https://lore.kernel.org/lkml/[email-masked]
Reviewed-by: Masami Hiramatsu (Google) <[email-masked]>
Cc: John Paul Adrian Glaubitz <[email-masked]>
Cc: Anna Schumaker <[email-masked]>
Cc: Boqun Feng <[email-masked]>
Cc: Finn Thain <[email-masked]>
Cc: Geert Uytterhoeven <[email-masked]>
Cc: Ingo Molnar <[email-masked]>
Cc: Joel Granados <[email-masked]>
Cc: John Stultz <[email-masked]>
Cc: Kent Overstreet <[email-masked]>
Cc: Lance Yang <[email-masked]>
Cc: Mingzhe Yang <[email-masked]>
Cc: Peter Zijlstra <[email-masked]>
Cc: Sergey Senozhatsky <[email-masked]>
Cc: Steven Rostedt <[email-masked]>
Cc: Tomasz Figa <[email-masked]>
Cc: Waiman Long <[email-masked]>
Cc: Will Deacon <[email-masked]>
Cc: Yongliang Gao <[email-masked]>
Cc: <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
---

 include/linux/hung_task.h |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/include/linux/hung_task.h~hung_task-fix-warnings-caused-by-unaligned-lock-pointers
+++ a/include/linux/hung_task.h
@@ -20,6 +20,10 @@
  * always zero. So we can use these bits to encode the specific blocking
  * type.
  *
+ * Note that on architectures where this is not guaranteed, or for any
+ * unaligned lock, this tracking mechanism is silently skipped for that
+ * lock.
+ *
  * Type encoding:
  * 00 - Blocked on mutex			(BLOCKER_TYPE_MUTEX)
  * 01 - Blocked on semaphore			(BLOCKER_TYPE_SEM)
@@ -45,7 +49,7 @@ static inline void hung_task_set_blocker
 	 * If the lock pointer matches the BLOCKER_TYPE_MASK, return
 	 * without writing anything.
 	 */
-	if (WARN_ON_ONCE(lock_ptr & BLOCKER_TYPE_MASK))
+	if (lock_ptr & BLOCKER_TYPE_MASK)
 		return;
 
 	WRITE_ONCE(current->blocker, lock_ptr | type);
@@ -53,8 +57,6 @@ static inline void hung_task_set_blocker
 
 static inline void hung_task_clear_blocker(void)
 {
-	WARN_ON_ONCE(!READ_ONCE(current->blocker));
-
 	WRITE_ONCE(current->blocker, 0UL);
 }
 
_

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From: pip-izony <[email-masked]>
To: Dmitry Torokhov <[email-masked]>
Cc: Seungjin Bae <[email-masked]>,
	Kyungtae Kim <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH] Input: pegasus-notetaker - fix out-of-bounds access vulnerability in pegasus_parse_packet() function of the pegasus driver
Date: Tue,  7 Oct 2025 17:41:32 -0400
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From: Seungjin Bae <[email-masked]>

In the pegasus_notetaker driver, the pegasus_probe() function allocates
the URB transfer buffer using the wMaxPacketSize value from
the endpoint descriptor. An attacker can use a malicious USB descriptor
to force the allocation of a very small buffer.

Subsequently, if the device sends an interrupt packet with a specific
pattern (e.g., where the first byte is 0x80 or 0x42),
the pegasus_parse_packet() function parses the packet without checking
the allocated buffer size. This leads to an out-of-bounds memory access,
which could result in a system panic.

Fixes: 948bf18 ("Input: remove third argument of usb_maxpacket()")
Signed-off-by: Seungjin Bae <[email-masked]>
---
 drivers/input/tablet/pegasus_notetaker.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c
index 8d6b71d59793..6c4199712a4e 100644
--- a/drivers/input/tablet/pegasus_notetaker.c
+++ b/drivers/input/tablet/pegasus_notetaker.c
@@ -311,6 +311,11 @@ static int pegasus_probe(struct usb_interface *intf,
 	}
 
 	pegasus->data_len = usb_maxpacket(dev, pipe);
+    if (pegasus->data_len < 5) {
+		dev_err(&intf->dev, "Invalid number of wMaxPacketSize\n");
+		error = -EINVAL;
+		goto err_free_mem;
+	}
 
 	pegasus->data = usb_alloc_coherent(dev, pegasus->data_len, GFP_KERNEL,
 					   &pegasus->data_dma);
-- 
2.43.0

From - Fri Oct 17 14:26:27 2025
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Date: Tue, 7 Oct 2025 15:20:36 -0700
From: Andrew Morton <[email-masked]>
To: Kairui Song <[email-masked]>
Cc: [email-masked], Kemeng Shi <[email-masked]>, Kairui Song
 <[email-masked]>, Nhat Pham <[email-masked]>, Baoquan He
 <[email-masked]>, Barry Song <[email-masked]>, Chris Li
 <[email-masked]>, Baolin Wang <[email-masked]>, David
 Hildenbrand <[email-masked]>, "Matthew Wilcox (Oracle)"
 <[email-masked]>, Ying Huang <[email-masked]>,
 [email-masked], [email-masked]
Subject: Re: [PATCH 0/4] mm, swap: misc cleanup and bugfix
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On Tue, 07 Oct 2025 04:02:32 +0800 Kairui Song <[email-masked]> wrote:

> A few cleanups and a bugfix that are either suitable after the swap
> table phase I or found during code review.
> 
> Patch 1 is a bugfix and needs to be included in the stable branch,
> the rest have no behavior change.

fyi, the presentation of the series suggests that [1/4] is not a hotfix
- that it won't hit mainline (and then -stable) until after 6.19-rc1.

Which sounds OK given this:

> So far, no issues have been observed or reported with typical SSD setups
> under months of high pressure. This issue was found during my code
> review. But by hacking the kernel a bit: adding a mdelay(100) in the
> async discard path, this issue will be observable with WARNING triggered
> by the wrong GFP and cond_resched in the bio layer.

From - Fri Oct 17 14:26:27 2025
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From: pip-izony <[email-masked]>
To: Marcel Holtmann <[email-masked]>
Cc: Seungjin Bae <[email-masked]>,
	Kyungtae Kim <[email-masked]>,
	Luiz Augusto von Dentz <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH] Bluetooth: bfusb: Fix buffer over-read in rx processing loop
Date: Tue,  7 Oct 2025 19:29:42 -0400
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SpamTally: Final spam score: 4

From: Seungjin Bae <[email-masked]>

The bfusb_rx_complete() function parses incoming URB data in while loop.
The logic does not sufficiently validate the remaining buffer size(count)
accross loop iterations, which can lead to a buffer over-read.

For example, with 4-bytes remaining buffer, if the first iteration takes
the `hdr & 0x4000` branch, 2-bytes are consumed. On the next iteration,
only 2-bytes remain, but the else branch is trying to access the third
byte(buf[2]). This causes an out-of-bounds read and a potential kernel panic.

This patch fixes the vulnerability by adding checks to ensure enough
data remains in the buffer before it is accessed.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Seungjin Bae <[email-masked]>
---
 drivers/bluetooth/bfusb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
index 8df310983bf6..f17eae6dbd7d 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -360,6 +360,10 @@ static void bfusb_rx_complete(struct urb *urb)
 			count -= 2;
 			buf   += 2;
 		} else {
+            if (count < 3) {
+                bf_dev_err(data->hdev, "block header is too short");
+                break;
+            }
 			len = (buf[2] == 0) ? 256 : buf[2];
 			count -= 3;
 			buf   += 3;
-- 
2.43.0

From - Fri Oct 17 14:26:27 2025
Delivery-date: Tue, 07 Oct 2025 17:32:51 +0000
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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: Takashi Iwai <[email-masked]>,
	[email-masked],
	Clemens Ladisch <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	[email-masked],
	[email-masked],
	Jeongjun Park <[email-masked]>
Subject: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free
Date: Wed,  8 Oct 2025 02:31:34 +0900
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SpamTally: Final spam score: 4

From: Jeongjun Park <[email-masked]>

[ Upstream commit 9f2c0ac1423d5f267e7f1d1940780fc764b0fee3 ]

The previous commit 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at
removal") patched a UAF issue caused by the error timer.

However, because the error timer kill added in this patch occurs after the
endpoint delete, a race condition to UAF still occurs, albeit rarely.

Additionally, since kill-cleanup for urb is also missing, freed memory can
be accessed in interrupt context related to urb, which can cause UAF.

Therefore, to prevent this, error timer and urb must be killed before
freeing the heap memory.

Cc: <[email-masked]>
Reported-by: [email-masked]
Closes: https://syzkaller.appspot.com/bug?extid=f02665daa2abeef4a947
Fixes: 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at removal")
Signed-off-by: Jeongjun Park <[email-masked]>
Signed-off-by: Takashi Iwai <[email-masked]>
---
 sound/usb/midi.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index c3de2b137435..461e183680da 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1522,15 +1522,14 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
 {
 	int i;
 
+	if (!umidi->disconnected)
+		snd_usbmidi_disconnect(&umidi->list);
+
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
-		if (ep->out)
-			snd_usbmidi_out_endpoint_delete(ep->out);
-		if (ep->in)
-			snd_usbmidi_in_endpoint_delete(ep->in);
+		kfree(ep->out);
 	}
 	mutex_destroy(&umidi->mutex);
-	timer_shutdown_sync(&umidi->error_timer);
 	kfree(umidi);
 }
 
--

From - Fri Oct 17 14:26:27 2025
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From: Peter Griffin <[email-masked]>
Date: Tue, 7 Oct 2025 21:18:36 +0100
Subject: Re: [PATCH] phy: exynos5-usbdrd: fix clock prepare imbalance
To: =?UTF-8?Q?Andr=C3=A9_Draszik?= <[email-masked]>
Cc: Vinod Koul <[email-masked]>, Kishon Vijay Abraham I <[email-masked]>, 
	Krzysztof Kozlowski <[email-masked]>, Alim Akhtar <[email-masked]>, 
	Tudor Ambarus <[email-masked]>, Will McVicker <[email-masked]>, 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked]
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On Mon, 6 Oct 2025 at 09:07, Andr=C3=A9 Draszik <[email-masked]> =
wrote:
>
> Commit f4fb9c4d7f94 ("phy: exynos5-usbdrd: allow DWC3 runtime suspend
> with UDC bound (E850+)") incorrectly added clk_bulk_disable() as the
> inverse of clk_bulk_prepare_enable() while it should have of course
> used clk_bulk_disable_unprepare(). This means incorrect reference
> counts to the CMU driver remain.
>
> Update the code accordingly.
>
> Fixes: f4fb9c4d7f94 ("phy: exynos5-usbdrd: allow DWC3 runtime suspend wit=
h UDC bound (E850+)")
> CC: [email-masked]
> Signed-off-by: Andr=C3=A9 Draszik <[email-masked]>
> ---

Reviewed-by: Peter Griffin <[email-masked]>

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Subject: RE: [PATCH v2 07/19 5.15.y] minmax: simplify and clarify
 min_t()/max_t() implementation
Date: Tue, 7 Oct 2025 20:43:19 +0000
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From: Ilia Gavrilov <[email-masked]>
To: Magnus Karlsson <[email-masked]>
CC: Maciej Fijalkowski <[email-masked]>, Stanislav Fomichev
	<[email-masked]>, "David S. Miller" <[email-masked]>, Eric Dumazet
	<[email-masked]>, Jakub Kicinski <[email-masked]>, Paolo Abeni
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Subject: [PATCH net v2] xsk: Fix overflow in descriptor validation
Date: Tue, 7 Oct 2025 14:06:45 +0000
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The desc->len value can be set up to U32_MAX. If umem tx_metadata_len
option is also set, the value of the expression
'desc->len + pool->tx_metadata_len' can overflow and validation
of the incorrect descriptor will be successfully passed.
This can lead to a subsequent chain of arithmetic overflows
in the xsk_build_skb() function and incorrect sk_buff allocation.

To reproduce the overflow, this piece of userspace code can be used:
       struct xdp_umem_reg umem_reg;
       umem_reg.addr =3D (__u64)(void *)umem;
       ...
       umem_reg.chunk_size =3D 4096;
       umem_reg.tx_metadata_len =3D 16;
       umem_reg.flags =3D XDP_UMEM_TX_METADATA_LEN;
       setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &umem_reg, sizeof(umem_reg));
       ...

       xsk_ring_prod__reserve(tq, batch_size, &idx);

       for (i =3D 0; i < nr_packets; ++i) {
               struct xdp_desc *tx_desc =3D xsk_ring_prod__tx_desc(tq, idx =
+ i);
               tx_desc->addr =3D packets[i].addr;
               tx_desc->addr +=3D umem->tx_metadata_len;
               tx_desc->options =3D XDP_TX_METADATA;
               tx_desc->len =3D UINT32_MAX;
       }

       xsk_ring_prod__submit(tq, nr_packets);
       ...
       sendto(sfd, NULL, 0, MSG_DONTWAIT, NULL, 0);

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Cc: [email-masked]
Signed-off-by: Ilia Gavrilov <[email-masked]>
---
v2: Add a repro
 net/xdp/xsk_queue.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index f16f390370dc..b206a8839b39 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -144,7 +144,7 @@ static inline bool xp_aligned_validate_desc(struct xsk_=
buff_pool *pool,
 					    struct xdp_desc *desc)
 {
 	u64 addr =3D desc->addr - pool->tx_metadata_len;
-	u64 len =3D desc->len + pool->tx_metadata_len;
+	u64 len =3D (u64)desc->len + pool->tx_metadata_len;
 	u64 offset =3D addr & (pool->chunk_size - 1);
=20
 	if (!desc->len)
@@ -165,7 +165,7 @@ static inline bool xp_unaligned_validate_desc(struct xs=
k_buff_pool *pool,
 					      struct xdp_desc *desc)
 {
 	u64 addr =3D xp_unaligned_add_offset_to_addr(desc->addr) - pool->tx_metad=
ata_len;
-	u64 len =3D desc->len + pool->tx_metadata_len;
+	u64 len =3D (u64)desc->len + pool->tx_metadata_len;
=20
 	if (!desc->len)
 		return false;
--=20
2.39.5

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Date: Tue, 7 Oct 2025 16:08:05 +0200
Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor
 validation@@
To: Ilia Gavrilov <[email-masked]>
CC: Magnus Karlsson <[email-masked]>, Song Yoong Siang
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From: Magnus Karlsson <[email-masked]>
Date: Tue, 7 Oct 2025 15:52:52 +0200

> On Tue, 7 Oct 2025 at 15:34, Ilia Gavrilov <[email-masked]> wrote:
>>
>> On 10/7/25 15:44, Magnus Karlsson wrote:
>>> On Tue, 7 Oct 2025 at 14:11, Alexander Lobakin
>>> <[email-masked]> wrote:
>>>>
>>>> From: Ilia Gavrilov <[email-masked]>
>>>> Date: Tue, 7 Oct 2025 11:19:19 +0000
>>>>
>>>>> On 10/6/25 18:19, Alexander Lobakin wrote:
>>>>>> From: Ilia Gavrilov <[email-masked]>
>>>>>> Date: Mon, 6 Oct 2025 08:53:17 +0000
>>>>>>
>>>>>>> The desc->len value can be set up to U32_MAX. If umem tx_metadata_len
>>>>>>
>>>>>> In theory. Never in practice.
>>>>>>
>>>>>
>>>>> Hi Alexander,
>>>>> Thank you for the review.
>>>>>
>>>>> It seems to me that this problem should be considered not from the point of view of practical use,
>>>>> but from the point of view of security. An attacker can set any length of the packet in the descriptor
>>>>> from the user space and descriptor validation will pass.
>>>>>
>>>>>
>>>>>>> option is also set, then the value of the expression
>>>>>>> 'desc->len + pool->tx_metadata_len' can overflow and validation
>>>>>>> of the incorrect descriptor will be successfully passed.
>>>>>>> This can lead to a subsequent chain of arithmetic overflows
>>>>>>> in the xsk_build_skb() function and incorrect sk_buff allocation.
>>>>>>>
>>>>>>> Found by InfoTeCS on behalf of Linux Verification Center
>>>>>>> (linuxtesting.org) with SVACE.
>>>>>>
>>>>>> I think the general rule for sending fixes is that a fix must fix a real
>>>>>> bug which can be reproduced in real life scenarios.
>>>>>
>>>>> I agree with that, so I make a test program (PoC). Something like that:
>>>>>
>>>>>       struct xdp_umem_reg umem_reg;
>>>>>       umem_reg.addr = (__u64)(void *)umem;
>>>>>       ...
>>>>>       umem_reg.chunk_size = 4096;
>>>>>       umem_reg.tx_metadata_len = 16;
>>>>>       umem_reg.flags = XDP_UMEM_TX_METADATA_LEN;
>>>>>       setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &umem_reg, sizeof(umem_reg));
>>>>>       ...
>>>>>
>>>>>       xsk_ring_prod__reserve(tq, batch_size, &idx);
>>>>>
>>>>>       for (i = 0; i < nr_packets; ++i) {
>>>>>               struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(tq, idx + i);
>>>>>               tx_desc->addr = packets[i].addr;
>>>>>               tx_desc->addr += umem->tx_metadata_len;
>>>>>               tx_desc->options = XDP_TX_METADATA;
>>>>>               tx_desc->len = UINT32_MAX;
>>>>>       }
>>>>>
>>>>>       xsk_ring_prod__submit(tq, nr_packets);
>>>>>       ...
>>>>>       sendto(sfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
>>>>>
>>>>> Since the check of an invalid descriptor has passed, kernel try to allocate
>>>>> a skb with size of 'hr + len + tr' in the sock_alloc_send_pskb() function
>>>>> and this is where the next overflow occurs.
>>>>> skb allocates with a size of 63. Next the skb_put() is called, which adds U32_MAX to skb->tail and skb->end.
>>>>> Next the skb_store_bits() tries to copy -1 bytes, but fails.
>>>>>
>>>>>  __xsk_generic_xmit
>>>>>       xsk_build_skb
>>>>>               len = desc->len; // from descriptor
>>>>>               sock_alloc_send_skb(..., hr + len + tr, ...) // the next overflow
>>>>>                       sock_alloc_send_pskb
>>>>>                               alloc_skb_with_frags
>>>>>               skb_put(skb, len)  // len casts to int
>>>>>               skb_store_bits(skb, 0, buffer, len)
>>>>
>>>> Oh, so you actually have a repro for this. This is good. I suggest you
>>>> resubmitting the patch and include this repro in the commit message, so
>>>> that it will be clear that it's actually possible to trigger the problem
>>>> in the kernel using a malicious/broken userspace application.
>>>>
>>
>> I'll add the repro from this e-mail in the next patch version,
>> the full source is too long.
>>
>>>> (also pls remove those double `@@` from the subject next time)
>>>>
>>
>> ok
>>
>>>> I'd also like to hear from Maciej and/or others what they think about
>>>> this problem (that the userspace can set packet len to U32_MAX). Should
>>>> we just go with this proposed u64 propagation or maybe we need to limit
>>>> the maximum length which could be sent from the userspace?
>>>
>>> I prefer that we do not set a limit on it and go with the proposed
>>> solution since I do not know what a future proof size limit would be.
>>> Somebody could come up with a new virtual device that can send really
>>> large packets, who knows.
>>>
>>
>> The limit is already checked in the xp_aligned_validate_desc() function:
> 
> What I meant was, let us not introduce a new limit. I like your
> proposed solution.

[to Ilia]

The netdev and XSk maintainers prefer to fix this themselves after a
quick discussion.
Let us take over this topic. Thanks for finding this.

Olek

From - Fri Oct 17 14:26:28 2025
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From: Jeongjun Park <[email-masked]>
To: [email-masked]
Cc: Takashi Iwai <[email-masked]>,
	[email-masked],
	Clemens Ladisch <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	[email-masked],
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	Jeongjun Park <[email-masked]>
Subject: [PATCH 6.12.y 6.6.y 6.1.y 5.15.y 5.10.y 5.4.y] ALSA: usb-audio: Kill timer properly at removal
Date: Wed,  8 Oct 2025 00:58:08 +0900
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From: Takashi Iwai <[email-masked]>

[ Upstream commit 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 ]

The USB-audio MIDI code initializes the timer, but in a rare case, the
driver might be freed without the disconnect call.  This leaves the
timer in an active state while the assigned object is released via
snd_usbmidi_free(), which ends up with a kernel warning when the debug
configuration is enabled, as spotted by fuzzer.

For avoiding the problem, put timer_shutdown_sync() at
snd_usbmidi_free(), so that the timer can be killed properly.
While we're at it, replace the existing timer_delete_sync() at the
disconnect callback with timer_shutdown_sync(), too.

Reported-by: [email-masked]
Closes: https://lore.kernel.org/[email-masked]
Cc: <[email-masked]>
Link: https://patch.msgid.link/[email-masked]
Signed-off-by: Takashi Iwai <[email-masked]>
[ del_timer vs timer_delete differences ]
Signed-off-by: Jeongjun Park <[email-masked]>
---
 sound/usb/midi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index a792ada18863..c3de2b137435 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1530,6 +1530,7 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
 			snd_usbmidi_in_endpoint_delete(ep->in);
 	}
 	mutex_destroy(&umidi->mutex);
+	timer_shutdown_sync(&umidi->error_timer);
 	kfree(umidi);
 }
 
@@ -1553,7 +1554,7 @@ void snd_usbmidi_disconnect(struct list_head *p)
 	spin_unlock_irq(&umidi->disc_lock);
 	up_write(&umidi->disc_rwsem);
 
-	del_timer_sync(&umidi->error_timer);
+	timer_shutdown_sync(&umidi->error_timer);
 
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
--

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From: Magnus Karlsson <[email-masked]>
Date: Tue, 7 Oct 2025 14:44:45 +0200
Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor validation@@
To: Alexander Lobakin <[email-masked]>
Cc: Ilia Gavrilov <[email-masked]>, 
	Song Yoong Siang <[email-masked]>, 
	Maciej Fijalkowski <[email-masked]>, Jesper Dangaard Brouer <[email-masked]>, 
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	"[email-masked]" <[email-masked]>, Paolo Abeni <[email-masked]>, 
	"David S. Miller" <[email-masked]>, Magnus Karlsson <[email-masked]>, 
	"[email-masked]" <[email-masked]>
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On Tue, 7 Oct 2025 at 14:11, Alexander Lobakin
<[email-masked]> wrote:
>
> From: Ilia Gavrilov <[email-masked]>
> Date: Tue, 7 Oct 2025 11:19:19 +0000
>
> > On 10/6/25 18:19, Alexander Lobakin wrote:
> >> From: Ilia Gavrilov <[email-masked]>
> >> Date: Mon, 6 Oct 2025 08:53:17 +0000
> >>
> >>> The desc->len value can be set up to U32_MAX. If umem tx_metadata_len
> >>
> >> In theory. Never in practice.
> >>
> >
> > Hi Alexander,
> > Thank you for the review.
> >
> > It seems to me that this problem should be considered not from the point of view of practical use,
> > but from the point of view of security. An attacker can set any length of the packet in the descriptor
> > from the user space and descriptor validation will pass.
> >
> >
> >>> option is also set, then the value of the expression
> >>> 'desc->len + pool->tx_metadata_len' can overflow and validation
> >>> of the incorrect descriptor will be successfully passed.
> >>> This can lead to a subsequent chain of arithmetic overflows
> >>> in the xsk_build_skb() function and incorrect sk_buff allocation.
> >>>
> >>> Found by InfoTeCS on behalf of Linux Verification Center
> >>> (linuxtesting.org) with SVACE.
> >>
> >> I think the general rule for sending fixes is that a fix must fix a real
> >> bug which can be reproduced in real life scenarios.
> >
> > I agree with that, so I make a test program (PoC). Something like that:
> >
> >       struct xdp_umem_reg umem_reg;
> >       umem_reg.addr = (__u64)(void *)umem;
> >       ...
> >       umem_reg.chunk_size = 4096;
> >       umem_reg.tx_metadata_len = 16;
> >       umem_reg.flags = XDP_UMEM_TX_METADATA_LEN;
> >       setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &umem_reg, sizeof(umem_reg));
> >       ...
> >
> >       xsk_ring_prod__reserve(tq, batch_size, &idx);
> >
> >       for (i = 0; i < nr_packets; ++i) {
> >               struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(tq, idx + i);
> >               tx_desc->addr = packets[i].addr;
> >               tx_desc->addr += umem->tx_metadata_len;
> >               tx_desc->options = XDP_TX_METADATA;
> >               tx_desc->len = UINT32_MAX;
> >       }
> >
> >       xsk_ring_prod__submit(tq, nr_packets);
> >       ...
> >       sendto(sfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
> >
> > Since the check of an invalid descriptor has passed, kernel try to allocate
> > a skb with size of 'hr + len + tr' in the sock_alloc_send_pskb() function
> > and this is where the next overflow occurs.
> > skb allocates with a size of 63. Next the skb_put() is called, which adds U32_MAX to skb->tail and skb->end.
> > Next the skb_store_bits() tries to copy -1 bytes, but fails.
> >
> >  __xsk_generic_xmit
> >       xsk_build_skb
> >               len = desc->len; // from descriptor
> >               sock_alloc_send_skb(..., hr + len + tr, ...) // the next overflow
> >                       sock_alloc_send_pskb
> >                               alloc_skb_with_frags
> >               skb_put(skb, len)  // len casts to int
> >               skb_store_bits(skb, 0, buffer, len)
>
> Oh, so you actually have a repro for this. This is good. I suggest you
> resubmitting the patch and include this repro in the commit message, so
> that it will be clear that it's actually possible to trigger the problem
> in the kernel using a malicious/broken userspace application.
>
> (also pls remove those double `@@` from the subject next time)
>
> I'd also like to hear from Maciej and/or others what they think about
> this problem (that the userspace can set packet len to U32_MAX). Should
> we just go with this proposed u64 propagation or maybe we need to limit
> the maximum length which could be sent from the userspace?

I prefer that we do not set a limit on it and go with the proposed
solution since I do not know what a future proof size limit would be.
Somebody could come up with a new virtual device that can send really
large packets, who knows.

> In any case, you raised a good topic.
>
> >
> >> Static Analysis Tools have no idea that nobody sends 4 Gb sized network
> >> packets.
> >>
> >
> > That's right. Static analyzer is only a tool, but in this case, the overflow
> > highlighted by the static analyzer can be used for malicious purposes.
>
> +1
>
> Also I really do hope Infotecs stayed independent from the govs and
> doesn't take part in any dual-purpose/gov-related projects.
>
> Thanks,
> Olek
>

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From: Ilia Gavrilov <[email-masked]>
To: Magnus Karlsson <[email-masked]>, Alexander Lobakin
	<[email-masked]>
CC: Song Yoong Siang <[email-masked]>, Maciej Fijalkowski
	<[email-masked]>, Jesper Dangaard Brouer <[email-masked]>,
	Daniel Borkmann <[email-masked]>, "[email-masked]"
	<[email-masked]>, John Fastabend <[email-masked]>, "Alexei
 Starovoitov" <[email-masked]>, "[email-masked]"
	<[email-masked]>, "[email-masked]"
	<[email-masked]>, Eric Dumazet <[email-masked]>,
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	<[email-masked]>, Magnus Karlsson <[email-masked]>,
	"[email-masked]" <[email-masked]>
Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor
 validation@@
Date: Tue, 7 Oct 2025 13:34:11 +0000
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From: Magnus Karlsson <[email-masked]>
Date: Tue, 7 Oct 2025 15:52:52 +0200
Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor validation@@
To: Ilia Gavrilov <[email-masked]>
Cc: Alexander Lobakin <[email-masked]>, 
	Song Yoong Siang <[email-masked]>, 
	Maciej Fijalkowski <[email-masked]>, Jesper Dangaard Brouer <[email-masked]>, 
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	"[email-masked]" <[email-masked]>, Paolo Abeni <[email-masked]>, 
	"David S. Miller" <[email-masked]>, Magnus Karlsson <[email-masked]>, 
	"[email-masked]" <[email-masked]>
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On Tue, 7 Oct 2025 at 15:34, Ilia Gavrilov <[email-masked]> wrote:
>
> On 10/7/25 15:44, Magnus Karlsson wrote:
> > On Tue, 7 Oct 2025 at 14:11, Alexander Lobakin
> > <[email-masked]> wrote:
> >>
> >> From: Ilia Gavrilov <[email-masked]>
> >> Date: Tue, 7 Oct 2025 11:19:19 +0000
> >>
> >>> On 10/6/25 18:19, Alexander Lobakin wrote:
> >>>> From: Ilia Gavrilov <[email-masked]>
> >>>> Date: Mon, 6 Oct 2025 08:53:17 +0000
> >>>>
> >>>>> The desc->len value can be set up to U32_MAX. If umem tx_metadata_len
> >>>>
> >>>> In theory. Never in practice.
> >>>>
> >>>
> >>> Hi Alexander,
> >>> Thank you for the review.
> >>>
> >>> It seems to me that this problem should be considered not from the point of view of practical use,
> >>> but from the point of view of security. An attacker can set any length of the packet in the descriptor
> >>> from the user space and descriptor validation will pass.
> >>>
> >>>
> >>>>> option is also set, then the value of the expression
> >>>>> 'desc->len + pool->tx_metadata_len' can overflow and validation
> >>>>> of the incorrect descriptor will be successfully passed.
> >>>>> This can lead to a subsequent chain of arithmetic overflows
> >>>>> in the xsk_build_skb() function and incorrect sk_buff allocation.
> >>>>>
> >>>>> Found by InfoTeCS on behalf of Linux Verification Center
> >>>>> (linuxtesting.org) with SVACE.
> >>>>
> >>>> I think the general rule for sending fixes is that a fix must fix a real
> >>>> bug which can be reproduced in real life scenarios.
> >>>
> >>> I agree with that, so I make a test program (PoC). Something like that:
> >>>
> >>>       struct xdp_umem_reg umem_reg;
> >>>       umem_reg.addr = (__u64)(void *)umem;
> >>>       ...
> >>>       umem_reg.chunk_size = 4096;
> >>>       umem_reg.tx_metadata_len = 16;
> >>>       umem_reg.flags = XDP_UMEM_TX_METADATA_LEN;
> >>>       setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &umem_reg, sizeof(umem_reg));
> >>>       ...
> >>>
> >>>       xsk_ring_prod__reserve(tq, batch_size, &idx);
> >>>
> >>>       for (i = 0; i < nr_packets; ++i) {
> >>>               struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(tq, idx + i);
> >>>               tx_desc->addr = packets[i].addr;
> >>>               tx_desc->addr += umem->tx_metadata_len;
> >>>               tx_desc->options = XDP_TX_METADATA;
> >>>               tx_desc->len = UINT32_MAX;
> >>>       }
> >>>
> >>>       xsk_ring_prod__submit(tq, nr_packets);
> >>>       ...
> >>>       sendto(sfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
> >>>
> >>> Since the check of an invalid descriptor has passed, kernel try to allocate
> >>> a skb with size of 'hr + len + tr' in the sock_alloc_send_pskb() function
> >>> and this is where the next overflow occurs.
> >>> skb allocates with a size of 63. Next the skb_put() is called, which adds U32_MAX to skb->tail and skb->end.
> >>> Next the skb_store_bits() tries to copy -1 bytes, but fails.
> >>>
> >>>  __xsk_generic_xmit
> >>>       xsk_build_skb
> >>>               len = desc->len; // from descriptor
> >>>               sock_alloc_send_skb(..., hr + len + tr, ...) // the next overflow
> >>>                       sock_alloc_send_pskb
> >>>                               alloc_skb_with_frags
> >>>               skb_put(skb, len)  // len casts to int
> >>>               skb_store_bits(skb, 0, buffer, len)
> >>
> >> Oh, so you actually have a repro for this. This is good. I suggest you
> >> resubmitting the patch and include this repro in the commit message, so
> >> that it will be clear that it's actually possible to trigger the problem
> >> in the kernel using a malicious/broken userspace application.
> >>
>
> I'll add the repro from this e-mail in the next patch version,
> the full source is too long.
>
> >> (also pls remove those double `@@` from the subject next time)
> >>
>
> ok
>
> >> I'd also like to hear from Maciej and/or others what they think about
> >> this problem (that the userspace can set packet len to U32_MAX). Should
> >> we just go with this proposed u64 propagation or maybe we need to limit
> >> the maximum length which could be sent from the userspace?
> >
> > I prefer that we do not set a limit on it and go with the proposed
> > solution since I do not know what a future proof size limit would be.
> > Somebody could come up with a new virtual device that can send really
> > large packets, who knows.
> >
>
> The limit is already checked in the xp_aligned_validate_desc() function:

What I meant was, let us not introduce a new limit. I like your
proposed solution.

> static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
>                                             struct xdp_desc *desc)
> {
>
> ...
>         if (offset + len > pool->chunk_size)
>                 return false;
> ...
> }
>
> and pool->chunk_size can't be more than PAGE_SIZE:
>
> static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
> {
>         u32 chunk_size = mr->chunk_size, headroom = mr->headroom;
>         ...
>
>         if (chunk_size < XDP_UMEM_MIN_CHUNK_SIZE || chunk_size > PAGE_SIZE) {
>                 /* Strictly speaking we could support this, if:
>                  * - huge pages, or*
>                  * - using an IOMMU, or
>                  * - making sure the memory area is consecutive
>                  * but for now, we simply say "computer says no".
>                  */
>
>                 return -EINVAL;
>         }
>         ...
> }
>
> The problem is exactly the overflow.
>
> >> In any case, you raised a good topic.
> >>
> >>>
> >>>> Static Analysis Tools have no idea that nobody sends 4 Gb sized network
> >>>> packets.
> >>>>
> >>>
> >>> That's right. Static analyzer is only a tool, but in this case, the overflow
> >>> highlighted by the static analyzer can be used for malicious purposes.
> >>
> >> +1
> >>
> >> Also I really do hope Infotecs stayed independent from the govs and
> >> doesn't take part in any dual-purpose/gov-related projects.
> >>
> >> Thanks,
> >> Olek
> >>
>

From - Fri Oct 17 14:26:28 2025
Delivery-date: Tue, 07 Oct 2025 11:38:38 +0000
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Date: Tue, 7 Oct 2025 17:08:13 +0530
Subject: Re: [PATCH] media: iris: Fix ffmpeg corrupted frame error
To: Vishnu Reddy <[email-masked]>, [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked]
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked]
From: Dikshita Agarwal <[email-masked]>
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On 10/6/2025 2:48 PM, Vishnu Reddy wrote:
> When the ffmpeg decoder is running, the driver receives the
> V4L2_BUF_FLAG_KEYFRAME flag in the input buffer. The driver then forwards
> this flag information to the firmware. The firmware, in turn, copies the
> input buffer flags directly into the output buffer flags. Upon receiving
> the output buffer from the firmware, the driver observes that the buffer
> contains the HFI_BUFFERFLAG_DATACORRUPT flag. The root cause is that both
> V4L2_BUF_FLAG_KEYFRAME and HFI_BUFFERFLAG_DATACORRUPT are the same value.
> As a result, the driver incorrectly interprets the output frame as
> corrupted, even though the frame is actually valid. This misinterpretation
> causes the driver to report an error and skip good frames, leading to
> missing frames in the final video output and triggering ffmpeg's "corrupt
> decoded frame" error.
> 
> To resolve this issue, the input buffer flags should not be sent to the
> firmware during decoding, since the firmware does not require this
> information.
> 
> Fixes: 17f2a485ca67 ("media: iris: implement vb2 ops for buf_queue and firmware response")
> Cc: [email-masked]
> Signed-off-by: Vishnu Reddy <[email-masked]>
> ---
>  drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> index e1788c266bb1..4de03f31eaf3 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> @@ -282,7 +282,7 @@ static int iris_hfi_gen1_queue_input_buffer(struct iris_inst *inst, struct iris_
>  		com_ip_pkt.shdr.session_id = inst->session_id;
>  		com_ip_pkt.time_stamp_hi = upper_32_bits(buf->timestamp);
>  		com_ip_pkt.time_stamp_lo = lower_32_bits(buf->timestamp);
> -		com_ip_pkt.flags = buf->flags;
> +		com_ip_pkt.flags = 0;
>  		com_ip_pkt.mark_target = 0;
>  		com_ip_pkt.mark_data = 0;
>  		com_ip_pkt.offset = buf->data_offset;

Reviewed-by: Dikshita Agarwal <[email-masked]>

Thanks,
Dikshita

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Date: Tue, 7 Oct 2025 14:09:52 +0200
Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor
 validation@@
To: Ilia Gavrilov <[email-masked]>
CC: Song Yoong Siang <[email-masked]>, Maciej Fijalkowski
	<[email-masked]>, Jesper Dangaard Brouer <[email-masked]>,
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	<[email-masked]>, "[email-masked]"
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References: <[email-masked]>
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From: Ilia Gavrilov <[email-masked]>
Date: Tue, 7 Oct 2025 11:19:19 +0000

> On 10/6/25 18:19, Alexander Lobakin wrote:
>> From: Ilia Gavrilov <[email-masked]>
>> Date: Mon, 6 Oct 2025 08:53:17 +0000
>>
>>> The desc->len value can be set up to U32_MAX. If umem tx_metadata_len
>>
>> In theory. Never in practice.
>>
> 
> Hi Alexander,
> Thank you for the review.
> 
> It seems to me that this problem should be considered not from the point of view of practical use, 
> but from the point of view of security. An attacker can set any length of the packet in the descriptor 
> from the user space and descriptor validation will pass.
> 
> 
>>> option is also set, then the value of the expression
>>> 'desc->len + pool->tx_metadata_len' can overflow and validation
>>> of the incorrect descriptor will be successfully passed.
>>> This can lead to a subsequent chain of arithmetic overflows
>>> in the xsk_build_skb() function and incorrect sk_buff allocation.
>>>
>>> Found by InfoTeCS on behalf of Linux Verification Center
>>> (linuxtesting.org) with SVACE.
>>
>> I think the general rule for sending fixes is that a fix must fix a real
>> bug which can be reproduced in real life scenarios.
> 
> I agree with that, so I make a test program (PoC). Something like that:
> 
> 	struct xdp_umem_reg umem_reg;
> 	umem_reg.addr = (__u64)(void *)umem;
> 	...
> 	umem_reg.chunk_size = 4096;
> 	umem_reg.tx_metadata_len = 16;
> 	umem_reg.flags = XDP_UMEM_TX_METADATA_LEN;
> 	setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &umem_reg, sizeof(umem_reg));
> 	...
> 	
> 	xsk_ring_prod__reserve(tq, batch_size, &idx);
> 
> 	for (i = 0; i < nr_packets; ++i) {
> 		struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(tq, idx + i);
> 		tx_desc->addr = packets[i].addr;
> 		tx_desc->addr += umem->tx_metadata_len;
> 		tx_desc->options = XDP_TX_METADATA;
> 		tx_desc->len = UINT32_MAX;
> 	}
> 
> 	xsk_ring_prod__submit(tq, nr_packets);
> 	...
> 	sendto(sfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
> 
> Since the check of an invalid descriptor has passed, kernel try to allocate
> a skb with size of 'hr + len + tr' in the sock_alloc_send_pskb() function
> and this is where the next overflow occurs.
> skb allocates with a size of 63. Next the skb_put() is called, which adds U32_MAX to skb->tail and skb->end.
> Next the skb_store_bits() tries to copy -1 bytes, but fails.
> 
>  __xsk_generic_xmit
> 	xsk_build_skb
> 		len = desc->len; // from descriptor
> 		sock_alloc_send_skb(..., hr + len + tr, ...) // the next overflow
> 			sock_alloc_send_pskb
> 				alloc_skb_with_frags
> 		skb_put(skb, len)  // len casts to int
> 		skb_store_bits(skb, 0, buffer, len)

Oh, so you actually have a repro for this. This is good. I suggest you
resubmitting the patch and include this repro in the commit message, so
that it will be clear that it's actually possible to trigger the problem
in the kernel using a malicious/broken userspace application.

(also pls remove those double `@@` from the subject next time)

I'd also like to hear from Maciej and/or others what they think about
this problem (that the userspace can set packet len to U32_MAX). Should
we just go with this proposed u64 propagation or maybe we need to limit
the maximum length which could be sent from the userspace?

In any case, you raised a good topic.

> 
>> Static Analysis Tools have no idea that nobody sends 4 Gb sized network
>> packets.
>>
> 
> That's right. Static analyzer is only a tool, but in this case, the overflow
> highlighted by the static analyzer can be used for malicious purposes.

+1

Also I really do hope Infotecs stayed independent from the govs and
doesn't take part in any dual-purpose/gov-related projects.

Thanks,
Olek

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Date: Tue, 07 Oct 2025 14:14:22 +0200
From: Takashi Iwai <[email-masked]>
To: Shenghao Ding <[email-masked]>
Cc: <[email-masked]>,
	<[email-masked]>,
	<[email-masked]>,
	<[email-masked]>,
	<[email-masked]>,
	<[email-masked]>,
	<[email-masked]>,
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Subject: Re: [PATCH v1] ALSA: hda/tas2781: Enable init_profile_id for device initialization
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On Tue, 07 Oct 2025 12:37:08 +0200,
Shenghao Ding wrote:
> 
> Optimize the time consumption of profile switching, init_profile saves
> the common settings of different profiles, such as the dsp coefficients,
> etc, which can greatly reduce the profile switching time comsumption and
> remove the repetitive settings.
> 
> Fixes: e83dcd139e77 ("ASoC: tas2781: Add keyword "init" in profile section")
> Signed-off-by: Shenghao Ding <[email-masked]>

Applied now.  Thanks.

Takashi

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From: Ilia Gavrilov <[email-masked]>
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CC: Song Yoong Siang <[email-masked]>, Maciej Fijalkowski
	<[email-masked]>, Jesper Dangaard Brouer <[email-masked]>,
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Subject: Re: [lvc-project] [PATCH net] xsk: Fix overflow in descriptor
 validation@@
Date: Tue, 7 Oct 2025 11:19:19 +0000
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Date: Tue, 7 Oct 2025 12:32:21 +0100
Subject: Re: [PATCH] media: iris: Fix ffmpeg corrupted frame error
To: Vishnu Reddy <[email-masked]>,
 [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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Cc: [email-masked], [email-masked],
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From: Bryan O'Donoghue <[email-masked]>
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On 06/10/2025 10:18, Vishnu Reddy wrote:
> When the ffmpeg decoder is running, the driver receives the
> V4L2_BUF_FLAG_KEYFRAME flag in the input buffer. The driver then forwards
> this flag information to the firmware. The firmware, in turn, copies the
> input buffer flags directly into the output buffer flags. Upon receiving
> the output buffer from the firmware, the driver observes that the buffer
> contains the HFI_BUFFERFLAG_DATACORRUPT flag. The root cause is that both
> V4L2_BUF_FLAG_KEYFRAME and HFI_BUFFERFLAG_DATACORRUPT are the same value.
> As a result, the driver incorrectly interprets the output frame as
> corrupted, even though the frame is actually valid. This misinterpretation
> causes the driver to report an error and skip good frames, leading to
> missing frames in the final video output and triggering ffmpeg's "corrupt
> decoded frame" error.
> 
> To resolve this issue, the input buffer flags should not be sent to the
> firmware during decoding, since the firmware does not require this
> information.
> 
> Fixes: 17f2a485ca67 ("media: iris: implement vb2 ops for buf_queue and firmware response")
> Cc: [email-masked]
> Signed-off-by: Vishnu Reddy <[email-masked]>
> ---
>   drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> index e1788c266bb1..4de03f31eaf3 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> @@ -282,7 +282,7 @@ static int iris_hfi_gen1_queue_input_buffer(struct iris_inst *inst, struct iris_
>   		com_ip_pkt.shdr.session_id = inst->session_id;
>   		com_ip_pkt.time_stamp_hi = upper_32_bits(buf->timestamp);
>   		com_ip_pkt.time_stamp_lo = lower_32_bits(buf->timestamp);
> -		com_ip_pkt.flags = buf->flags;
> +		com_ip_pkt.flags = 0;
>   		com_ip_pkt.mark_target = 0;
>   		com_ip_pkt.mark_data = 0;
>   		com_ip_pkt.offset = buf->data_offset;
> --
> 2.34.1
> 

Reviewed-by: Bryan O'Donoghue <[email-masked]>

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From: Amir Goldstein <[email-masked]>
Date: Tue, 7 Oct 2025 13:08:10 +0200
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: Jan Kara <[email-masked]>
Cc: Ryan Roberts <[email-masked]>, David Hildenbrand <[email-masked]>, 
	Andrew Morton <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
	"Liam R. Howlett" <[email-masked]>, Vlastimil Babka <[email-masked]>, 
	Mike Rapoport <[email-masked]>, Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>, 
	[email-masked], [email-masked], [email-masked]
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                             [142.0.200.124 listed in sa-accredit.habeas.com]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
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                             [amir73il[at]gmail.com]
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                             author's domain
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                             valid
  0.0 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and
                             EnvelopeFrom freemail headers are
                             different
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                             manager
SpamTally: Final spam score: 4

On Mon, Oct 6, 2025 at 4:40=E2=80=AFPM Amir Goldstein <[email-masked]> =
wrote:
>
> On Mon, Oct 6, 2025 at 3:53=E2=80=AFPM David Hildenbrand <[email-masked]=
m> wrote:
> >
> > On 06.10.25 14:14, Ryan Roberts wrote:
> > > On 06/10/2025 12:36, David Hildenbrand wrote:
> > >> On 03.10.25 17:52, Ryan Roberts wrote:
> > >>> fsnotify_mmap_perm() requires a byte offset for the file about to b=
e
> > >>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page of=
fset.
> > >>> Previously the conversion was done incorrectly so let's fix it, bei=
ng
> > >>> careful not to overflow on 32-bit platforms.
> > >>>
> > >>> Discovered during code review.
> > >>>
> > >>> Cc: <[email-masked]>
> > >>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> > >>> Signed-off-by: Ryan Roberts <[email-masked]>
> > >>> ---
> > >>> Applies against today's mm-unstable (aa05a436eca8).
> > >>>
> > >>
> > >> Curious: is there some easy way to write a reproducer? Did you look =
into that?
> > >
> > > I didn't; this was just a drive-by discovery.
> > >
> > > It looks like there are some fanotify tests in the filesystems selfte=
sts; I
> > > guess they could be extended to add a regression test?
> > >
> > > But FWIW, I think the kernel is just passing the ofset/length info of=
f to user
> > > space and isn't acting on it itself. So there is no kernel vulnerabil=
ity here.
> >
> > Right, I'm rather wondering if this could have been caught earlier and
> > how we could have caught it earlier :)
>
> Ha! you would have thought we either have no test for it or we test
> only mmap with offset 0.
>
> But we have LTP test fanotify24 which does mmap with offset page_sz*100
> and indeed it prints the info and info says offset 0, only we do not veri=
fy the
> offset info in this test...
>
> Will be fixed.

Jan,

FYI test enhanced and verified the bug and the fix:
https://github.com/amir73il/ltp/commits/fsnotify-fixes/

Will wait with posting the test until you merge the fix to make sure that t=
he
commit id is not changed.

Thanks,
Amir.

From - Fri Oct 17 14:26:28 2025
Delivery-date: Tue, 07 Oct 2025 11:11:06 +0000
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Date: Tue, 7 Oct 2025 13:10:10 +0200
From: Benoit Panizzon <[email-masked]>
To: Salvatore Bonaccorso <[email-masked]>
Cc: [email-masked], [email-masked],
        [email-masked], Benoit Panizzon <[email-masked]>,
        Max
 Kellermann <[email-masked]>,
        David Howells <[email-masked]>,
        Paulo Alcantara <[email-masked]>, [email-masked],
        [email-masked], [email-masked],
        [email-masked], [email-masked]
Subject: Re: Bug#1111455: [[email-masked]: Bug#1111455:
 linux-image-6.12.41+deb13-amd64: kernel BUG at fs/netfs/read_collect.c:316
 netfs: Can't donate prior to front]
Organization: ImproWare AG
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                             The query to Validity was blocked.  See
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                             [142.0.200.124 listed in sa-accredit.habeas.com]
  1.5 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                             mail domains are different
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 -0.1 DKIM_VALID_AU          Message has a valid DKIM or DK signature from
                             author's domain
  0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily
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 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
SpamTally: Final spam score: 4

Hi Salvatore

> Can you still reproduce this with a more current 6.12.y version? Can
> you test as well the newest version of the 6.16.y version (even there
> was a major refactoring to see if it affects only the 6.12.y series)?

Sorry for the delay.

6.16 from experimental is working finde.

Just booted into:

6.12.48+deb13-amd64

/home on nfs - claws-mail / chromium so lots of small i/o

NFS server is: FreeBSD 13.2-RELEASE-p1

nfshome:/home on /home type nfs (rw,relatime,vers=3D3,rsize=3D8192,wsize=3D=
8192,namlen=3D255,hard,proto=3Dtcp,timeo=3D600,retrans=3D2,sec=3Dsys,mounta=
ddr=3Dx.x.x.x,mountvers=3D3,mountport=3D689,mountproto=3Dtcp,fsc,local_lock=
=3Dnone,addr=3Dx.x.x.x)

And after a couple of minutes I get:

[Di Okt  7 13:03:30 2025] netfs: Can't donate prior to front
[Di Okt  7 13:03:30 2025] R=3D000017d2[10] s=3Dda000-dbfff 0/2000/2000
[Di Okt  7 13:03:30 2025] folio: d8000-dbfff
[Di Okt  7 13:03:30 2025] donated: prev=3D0 next=3D0
[Di Okt  7 13:03:30 2025] s=3Dda000 av=3D2000 part=3D2000
[Di Okt  7 13:03:30 2025] ------------[ cut here ]------------
[Di Okt  7 13:03:30 2025] kernel BUG at fs/netfs/read_collect.c:316!
[Di Okt  7 13:03:30 2025] Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[Di Okt  7 13:03:30 2025] CPU: 14 UID: 0 PID: 121 Comm: kworker/u64:7 Not t=
ainted 6.12.48+deb13-amd64 #1  Debian 6.12.48-1
[Di Okt  7 13:03:30 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS M47KT=
26A 11/23/2022
[Di Okt  7 13:03:30 2025] Workqueue: nfsiod rpc_async_release [sunrpc]
[Di Okt  7 13:03:30 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:30 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:30 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:30 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:30 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:30 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:30 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:30 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:30 2025] FS:  0000000000000000(0000) GS:ffff8c098e900000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:30 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:30 2025] CR2: 00007efd8421a000 CR3: 000000019b756000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:30 2025] PKRU: 55555554
[Di Okt  7 13:03:30 2025] Call Trace:
[Di Okt  7 13:03:30 2025]  <TASK>
[Di Okt  7 13:03:30 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 [netfs]
[Di Okt  7 13:03:30 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs]
[Di Okt  7 13:03:30 2025]  nfs_read_completion+0xf6/0x130 [nfs]
[Di Okt  7 13:03:30 2025]  rpc_free_task+0x39/0x60 [sunrpc]
[Di Okt  7 13:03:30 2025]  rpc_async_release+0x2f/0x40 [sunrpc]
[Di Okt  7 13:03:30 2025]  process_one_work+0x177/0x330
[Di Okt  7 13:03:30 2025]  worker_thread+0x251/0x390
[Di Okt  7 13:03:30 2025]  ? __pfx_worker_thread+0x10/0x10
[Di Okt  7 13:03:30 2025]  kthread+0xd2/0x100
[Di Okt  7 13:03:30 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:30 2025]  ret_from_fork+0x34/0x50
[Di Okt  7 13:03:30 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:30 2025]  ret_from_fork_asm+0x1a/0x30
[Di Okt  7 13:03:30 2025]  </TASK>
[Di Okt  7 13:03:30 2025] Modules linked in: cachefiles nfsv3 rpcsec_gss_kr=
b5 nfsv4 dns_resolver nfs netfs nft_chain_nat xt_MASQUERADE nf_nat nf_connt=
rack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c wireguard=
 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 curve25519_x86_64 libcur=
ve25519_generic libchacha vxlan ip6_udp_tunnel udp_tunnel bridge stp llc bt=
usb btrtl btintel btbcm btmtk bluetooth joydev qrtr nfsd auth_rpcgss binfmt=
_misc nfs_acl lockd grace nls_ascii nls_cp437 sunrpc vfat fat amd_atl intel=
_rapl_msr intel_rapl_common rtw88_8822ce rtw88_8822c edac_mce_amd rtw88_pci=
 snd_sof_amd_rembrandt rtw88_core kvm_amd snd_sof_amd_acp snd_sof_pci snd_s=
of_xtensa_dsp mac80211 snd_hda_codec_realtek snd_sof kvm snd_hda_codec_gene=
ric snd_sof_utils snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core =
snd_hda_intel snd_intel_dspcfg libarc4 snd_compress irqbypass snd_intel_sdw=
_acpi snd_pcm_dmaengine crct10dif_pclmul snd_hda_codec snd_pci_ps ghash_clm=
ulni_intel snd_rpl_pci_acp6x cfg80211 sha512_ssse3 snd_hda_core
[Di Okt  7 13:03:30 2025]  snd_acp_pci snd_acp_legacy_common sha256_ssse3 s=
nd_hwdep snd_pci_acp6x sha1_ssse3 snd_pcm aesni_intel ee1004 gf128mul wmi_b=
mof snd_pci_acp5x crypto_simd think_lmi snd_timer snd_rn_pci_acp3x cryptd f=
irmware_attributes_class snd_acp_config rapl snd snd_soc_acpi k10temp ccp p=
cspkr snd_pci_acp3x rfkill soundcore evdev parport_pc ppdev lp parport efi_=
pstore configfs nfnetlink efivarfs ip_tables x_tables autofs4 ext4 mbcache =
jbd2 crc32c_generic hid_plantronics hid_generic usbhid hid amdgpu dm_mod am=
dxcp drm_exec gpu_sched drm_buddy i2c_algo_bit drm_suballoc_helper drm_disp=
lay_helper cec rc_core drm_ttm_helper xhci_pci ttm xhci_hcd drm_kms_helper =
drm r8169 nvme usbcore realtek nvme_core sp5100_tco mdio_devres watchdog vi=
deo libphy crc32_pclmul i2c_piix4 crc16 usb_common nvme_auth crc32c_intel i=
2c_smbus wmi button
[Di Okt  7 13:03:30 2025] ---[ end trace 0000000000000000 ]---
[Di Okt  7 13:03:30 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:30 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:30 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:30 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:30 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:30 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:30 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:30 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:30 2025] FS:  0000000000000000(0000) GS:ffff8c098e900000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:30 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:30 2025] CR2: 00007efd8421a000 CR3: 000000019b756000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:30 2025] PKRU: 55555554
[Di Okt  7 13:03:35 2025] netfs: Can't donate prior to front
[Di Okt  7 13:03:35 2025] R=3D00001e80[4] s=3D6000-7fff 0/2000/2000
[Di Okt  7 13:03:35 2025] folio: 4000-7fff
[Di Okt  7 13:03:35 2025] donated: prev=3D0 next=3D0
[Di Okt  7 13:03:35 2025] s=3D6000 av=3D2000 part=3D2000
[Di Okt  7 13:03:35 2025] ------------[ cut here ]------------
[Di Okt  7 13:03:35 2025] kernel BUG at fs/netfs/read_collect.c:316!
[Di Okt  7 13:03:35 2025] Oops: invalid opcode: 0000 [#2] PREEMPT SMP NOPTI
[Di Okt  7 13:03:35 2025] CPU: 6 UID: 0 PID: 3979 Comm: kworker/u64:17 Tain=
ted: G      D            6.12.48+deb13-amd64 #1  Debian 6.12.48-1
[Di Okt  7 13:03:35 2025] Tainted: [D]=3DDIE
[Di Okt  7 13:03:35 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS M47KT=
26A 11/23/2022
[Di Okt  7 13:03:35 2025] Workqueue: nfsiod rpc_async_release [sunrpc]
[Di Okt  7 13:03:35 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:35 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:35 2025] RSP: 0018:ffff97b3c76e7d58 EFLAGS: 00010246
[Di Okt  7 13:03:35 2025] RAX: 0000000000000018 RBX: ffff8c068b3dc3c0 RCX: =
0000000000000027
[Di Okt  7 13:03:35 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e521780
[Di Okt  7 13:03:35 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c76e7be8
[Di Okt  7 13:03:35 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c0686c24468
[Di Okt  7 13:03:35 2025] R13: 0000000000004000 R14: ffff8c0686c24468 R15: =
0000000000006000
[Di Okt  7 13:03:35 2025] FS:  0000000000000000(0000) GS:ffff8c098e500000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:35 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:35 2025] CR2: 00003394003da080 CR3: 000000010c8d8000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:35 2025] PKRU: 55555554
[Di Okt  7 13:03:35 2025] Call Trace:
[Di Okt  7 13:03:35 2025]  <TASK>
[Di Okt  7 13:03:35 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 [netfs]
[Di Okt  7 13:03:35 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs]
[Di Okt  7 13:03:35 2025]  nfs_read_completion+0xf6/0x130 [nfs]
[Di Okt  7 13:03:35 2025]  rpc_free_task+0x39/0x60 [sunrpc]
[Di Okt  7 13:03:35 2025]  rpc_async_release+0x2f/0x40 [sunrpc]
[Di Okt  7 13:03:35 2025]  process_one_work+0x177/0x330
[Di Okt  7 13:03:35 2025]  worker_thread+0x251/0x390
[Di Okt  7 13:03:35 2025]  ? __pfx_worker_thread+0x10/0x10
[Di Okt  7 13:03:35 2025]  kthread+0xd2/0x100
[Di Okt  7 13:03:35 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:35 2025]  ret_from_fork+0x34/0x50
[Di Okt  7 13:03:35 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:35 2025]  ret_from_fork_asm+0x1a/0x30
[Di Okt  7 13:03:35 2025]  </TASK>
[Di Okt  7 13:03:35 2025] Modules linked in: cachefiles nfsv3 rpcsec_gss_kr=
b5 nfsv4 dns_resolver nfs netfs nft_chain_nat xt_MASQUERADE nf_nat nf_connt=
rack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c wireguard=
 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 curve25519_x86_64 libcur=
ve25519_generic libchacha vxlan ip6_udp_tunnel udp_tunnel bridge stp llc bt=
usb btrtl btintel btbcm btmtk bluetooth joydev qrtr nfsd auth_rpcgss binfmt=
_misc nfs_acl lockd grace nls_ascii nls_cp437 sunrpc vfat fat amd_atl intel=
_rapl_msr intel_rapl_common rtw88_8822ce rtw88_8822c edac_mce_amd rtw88_pci=
 snd_sof_amd_rembrandt rtw88_core kvm_amd snd_sof_amd_acp snd_sof_pci snd_s=
of_xtensa_dsp mac80211 snd_hda_codec_realtek snd_sof kvm snd_hda_codec_gene=
ric snd_sof_utils snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core =
snd_hda_intel snd_intel_dspcfg libarc4 snd_compress irqbypass snd_intel_sdw=
_acpi snd_pcm_dmaengine crct10dif_pclmul snd_hda_codec snd_pci_ps ghash_clm=
ulni_intel snd_rpl_pci_acp6x cfg80211 sha512_ssse3 snd_hda_core
[Di Okt  7 13:03:35 2025]  snd_acp_pci snd_acp_legacy_common sha256_ssse3 s=
nd_hwdep snd_pci_acp6x sha1_ssse3 snd_pcm aesni_intel ee1004 gf128mul wmi_b=
mof snd_pci_acp5x crypto_simd think_lmi snd_timer snd_rn_pci_acp3x cryptd f=
irmware_attributes_class snd_acp_config rapl snd snd_soc_acpi k10temp ccp p=
cspkr snd_pci_acp3x rfkill soundcore evdev parport_pc ppdev lp parport efi_=
pstore configfs nfnetlink efivarfs ip_tables x_tables autofs4 ext4 mbcache =
jbd2 crc32c_generic hid_plantronics hid_generic usbhid hid amdgpu dm_mod am=
dxcp drm_exec gpu_sched drm_buddy i2c_algo_bit drm_suballoc_helper drm_disp=
lay_helper cec rc_core drm_ttm_helper xhci_pci ttm xhci_hcd drm_kms_helper =
drm r8169 nvme usbcore realtek nvme_core sp5100_tco mdio_devres watchdog vi=
deo libphy crc32_pclmul i2c_piix4 crc16 usb_common nvme_auth crc32c_intel i=
2c_smbus wmi button
[Di Okt  7 13:03:35 2025] ---[ end trace 0000000000000000 ]---
[Di Okt  7 13:03:35 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:35 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:35 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:35 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:35 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:35 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:35 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:35 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:35 2025] FS:  0000000000000000(0000) GS:ffff8c098e500000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:35 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:35 2025] CR2: 00003394003da080 CR3: 000000010c8d8000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:35 2025] PKRU: 55555554
[Di Okt  7 13:03:47 2025] netfs: Can't donate prior to front
[Di Okt  7 13:03:47 2025] R=3D00002f1f[4] s=3D6000-7fff 0/2000/2000
[Di Okt  7 13:03:47 2025] folio: 4000-7fff
[Di Okt  7 13:03:47 2025] donated: prev=3D0 next=3D0
[Di Okt  7 13:03:47 2025] s=3D6000 av=3D2000 part=3D2000
[Di Okt  7 13:03:47 2025] ------------[ cut here ]------------
[Di Okt  7 13:03:47 2025] kernel BUG at fs/netfs/read_collect.c:316!
[Di Okt  7 13:03:47 2025] Oops: invalid opcode: 0000 [#3] PREEMPT SMP NOPTI
[Di Okt  7 13:03:47 2025] CPU: 4 UID: 0 PID: 127 Comm: kworker/u64:13 Taint=
ed: G      D            6.12.48+deb13-amd64 #1  Debian 6.12.48-1
[Di Okt  7 13:03:47 2025] Tainted: [D]=3DDIE
[Di Okt  7 13:03:47 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS M47KT=
26A 11/23/2022
[Di Okt  7 13:03:47 2025] Workqueue: nfsiod rpc_async_release [sunrpc]
[Di Okt  7 13:03:47 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:47 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:47 2025] RSP: 0018:ffff97b3c05dbd58 EFLAGS: 00010246
[Di Okt  7 13:03:47 2025] RAX: 0000000000000018 RBX: ffff8c0686b7b140 RCX: =
0000000000000027
[Di Okt  7 13:03:47 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e421780
[Di Okt  7 13:03:47 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05dbbe8
[Di Okt  7 13:03:47 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c0686baeee8
[Di Okt  7 13:03:47 2025] R13: 0000000000004000 R14: ffff8c0686baeee8 R15: =
0000000000006000
[Di Okt  7 13:03:47 2025] FS:  0000000000000000(0000) GS:ffff8c098e400000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:47 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:47 2025] CR2: 00000be400a7b020 CR3: 00000001cee22000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:47 2025] PKRU: 55555554
[Di Okt  7 13:03:47 2025] Call Trace:
[Di Okt  7 13:03:47 2025]  <TASK>
[Di Okt  7 13:03:47 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 [netfs]
[Di Okt  7 13:03:47 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs]
[Di Okt  7 13:03:47 2025]  nfs_read_completion+0xf6/0x130 [nfs]
[Di Okt  7 13:03:47 2025]  rpc_free_task+0x39/0x60 [sunrpc]
[Di Okt  7 13:03:47 2025]  rpc_async_release+0x2f/0x40 [sunrpc]
[Di Okt  7 13:03:47 2025]  process_one_work+0x177/0x330
[Di Okt  7 13:03:47 2025]  worker_thread+0x251/0x390
[Di Okt  7 13:03:47 2025]  ? __pfx_worker_thread+0x10/0x10
[Di Okt  7 13:03:47 2025]  kthread+0xd2/0x100
[Di Okt  7 13:03:47 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:47 2025]  ret_from_fork+0x34/0x50
[Di Okt  7 13:03:47 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:47 2025]  ret_from_fork_asm+0x1a/0x30
[Di Okt  7 13:03:47 2025]  </TASK>
[Di Okt  7 13:03:47 2025] Modules linked in: cachefiles nfsv3 rpcsec_gss_kr=
b5 nfsv4 dns_resolver nfs netfs nft_chain_nat xt_MASQUERADE nf_nat nf_connt=
rack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c wireguard=
 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 curve25519_x86_64 libcur=
ve25519_generic libchacha vxlan ip6_udp_tunnel udp_tunnel bridge stp llc bt=
usb btrtl btintel btbcm btmtk bluetooth joydev qrtr nfsd auth_rpcgss binfmt=
_misc nfs_acl lockd grace nls_ascii nls_cp437 sunrpc vfat fat amd_atl intel=
_rapl_msr intel_rapl_common rtw88_8822ce rtw88_8822c edac_mce_amd rtw88_pci=
 snd_sof_amd_rembrandt rtw88_core kvm_amd snd_sof_amd_acp snd_sof_pci snd_s=
of_xtensa_dsp mac80211 snd_hda_codec_realtek snd_sof kvm snd_hda_codec_gene=
ric snd_sof_utils snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core =
snd_hda_intel snd_intel_dspcfg libarc4 snd_compress irqbypass snd_intel_sdw=
_acpi snd_pcm_dmaengine crct10dif_pclmul snd_hda_codec snd_pci_ps ghash_clm=
ulni_intel snd_rpl_pci_acp6x cfg80211 sha512_ssse3 snd_hda_core
[Di Okt  7 13:03:47 2025]  snd_acp_pci snd_acp_legacy_common sha256_ssse3 s=
nd_hwdep snd_pci_acp6x sha1_ssse3 snd_pcm aesni_intel ee1004 gf128mul wmi_b=
mof snd_pci_acp5x crypto_simd think_lmi snd_timer snd_rn_pci_acp3x cryptd f=
irmware_attributes_class snd_acp_config rapl snd snd_soc_acpi k10temp ccp p=
cspkr snd_pci_acp3x rfkill soundcore evdev parport_pc ppdev lp parport efi_=
pstore configfs nfnetlink efivarfs ip_tables x_tables autofs4 ext4 mbcache =
jbd2 crc32c_generic hid_plantronics hid_generic usbhid hid amdgpu dm_mod am=
dxcp drm_exec gpu_sched drm_buddy i2c_algo_bit drm_suballoc_helper drm_disp=
lay_helper cec rc_core drm_ttm_helper xhci_pci ttm xhci_hcd drm_kms_helper =
drm r8169 nvme usbcore realtek nvme_core sp5100_tco mdio_devres watchdog vi=
deo libphy crc32_pclmul i2c_piix4 crc16 usb_common nvme_auth crc32c_intel i=
2c_smbus wmi button
[Di Okt  7 13:03:47 2025] ---[ end trace 0000000000000000 ]---
[Di Okt  7 13:03:49 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:49 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:49 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:49 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:49 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:49 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:49 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:49 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:49 2025] FS:  0000000000000000(0000) GS:ffff8c098e400000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:49 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:49 2025] CR2: 00000be400a7b020 CR3: 0000000210e8c000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:49 2025] PKRU: 55555554
[Di Okt  7 13:03:51 2025] netfs: Can't donate prior to front
[Di Okt  7 13:03:51 2025] R=3D0000300a[e] s=3D72000-77fff 0/6000/6000
[Di Okt  7 13:03:51 2025] folio: 70000-77fff
[Di Okt  7 13:03:51 2025] donated: prev=3D0 next=3D0
[Di Okt  7 13:03:51 2025] s=3D72000 av=3D6000 part=3D6000
[Di Okt  7 13:03:51 2025] ------------[ cut here ]------------
[Di Okt  7 13:03:51 2025] kernel BUG at fs/netfs/read_collect.c:316!
[Di Okt  7 13:03:51 2025] Oops: invalid opcode: 0000 [#4] PREEMPT SMP NOPTI
[Di Okt  7 13:03:51 2025] CPU: 5 UID: 0 PID: 118 Comm: kworker/u64:4 Tainte=
d: G      D            6.12.48+deb13-amd64 #1  Debian 6.12.48-1
[Di Okt  7 13:03:51 2025] Tainted: [D]=3DDIE
[Di Okt  7 13:03:51 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS M47KT=
26A 11/23/2022
[Di Okt  7 13:03:51 2025] Workqueue: nfsiod rpc_async_release [sunrpc]
[Di Okt  7 13:03:51 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:51 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:51 2025] RSP: 0018:ffff97b3c0593d58 EFLAGS: 00010246
[Di Okt  7 13:03:51 2025] RAX: 0000000000000019 RBX: ffff8c069193a480 RCX: =
0000000000000027
[Di Okt  7 13:03:51 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e4a1780
[Di Okt  7 13:03:51 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c0593be8
[Di Okt  7 13:03:51 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c068246a4e8
[Di Okt  7 13:03:51 2025] R13: 0000000000008000 R14: ffff8c068246a4e8 R15: =
0000000000072000
[Di Okt  7 13:03:51 2025] FS:  0000000000000000(0000) GS:ffff8c098e480000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:51 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:51 2025] CR2: 00007f62f83d2000 CR3: 00000001ba55a000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:51 2025] PKRU: 55555554
[Di Okt  7 13:03:51 2025] Call Trace:
[Di Okt  7 13:03:51 2025]  <TASK>
[Di Okt  7 13:03:51 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 [netfs]
[Di Okt  7 13:03:51 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs]
[Di Okt  7 13:03:51 2025]  nfs_read_completion+0xf6/0x130 [nfs]
[Di Okt  7 13:03:51 2025]  rpc_free_task+0x39/0x60 [sunrpc]
[Di Okt  7 13:03:51 2025]  rpc_async_release+0x2f/0x40 [sunrpc]
[Di Okt  7 13:03:51 2025]  process_one_work+0x177/0x330
[Di Okt  7 13:03:51 2025]  worker_thread+0x251/0x390
[Di Okt  7 13:03:51 2025]  ? __pfx_worker_thread+0x10/0x10
[Di Okt  7 13:03:51 2025]  kthread+0xd2/0x100
[Di Okt  7 13:03:51 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:51 2025]  ret_from_fork+0x34/0x50
[Di Okt  7 13:03:51 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:51 2025]  ret_from_fork_asm+0x1a/0x30
[Di Okt  7 13:03:51 2025]  </TASK>
[Di Okt  7 13:03:51 2025] Modules linked in: cachefiles nfsv3 rpcsec_gss_kr=
b5 nfsv4 dns_resolver nfs netfs nft_chain_nat xt_MASQUERADE nf_nat nf_connt=
rack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c wireguard=
 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 curve25519_x86_64 libcur=
ve25519_generic libchacha vxlan ip6_udp_tunnel udp_tunnel bridge stp llc bt=
usb btrtl btintel btbcm btmtk bluetooth joydev qrtr nfsd auth_rpcgss binfmt=
_misc nfs_acl lockd grace nls_ascii nls_cp437 sunrpc vfat fat amd_atl intel=
_rapl_msr intel_rapl_common rtw88_8822ce rtw88_8822c edac_mce_amd rtw88_pci=
 snd_sof_amd_rembrandt rtw88_core kvm_amd snd_sof_amd_acp snd_sof_pci snd_s=
of_xtensa_dsp mac80211 snd_hda_codec_realtek snd_sof kvm snd_hda_codec_gene=
ric snd_sof_utils snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core =
snd_hda_intel snd_intel_dspcfg libarc4 snd_compress irqbypass snd_intel_sdw=
_acpi snd_pcm_dmaengine crct10dif_pclmul snd_hda_codec snd_pci_ps ghash_clm=
ulni_intel snd_rpl_pci_acp6x cfg80211 sha512_ssse3 snd_hda_core
[Di Okt  7 13:03:51 2025]  snd_acp_pci snd_acp_legacy_common sha256_ssse3 s=
nd_hwdep snd_pci_acp6x sha1_ssse3 snd_pcm aesni_intel ee1004 gf128mul wmi_b=
mof snd_pci_acp5x crypto_simd think_lmi snd_timer snd_rn_pci_acp3x cryptd f=
irmware_attributes_class snd_acp_config rapl snd snd_soc_acpi k10temp ccp p=
cspkr snd_pci_acp3x rfkill soundcore evdev parport_pc ppdev lp parport efi_=
pstore configfs nfnetlink efivarfs ip_tables x_tables autofs4 ext4 mbcache =
jbd2 crc32c_generic hid_plantronics hid_generic usbhid hid amdgpu dm_mod am=
dxcp drm_exec gpu_sched drm_buddy i2c_algo_bit drm_suballoc_helper drm_disp=
lay_helper cec rc_core drm_ttm_helper xhci_pci ttm xhci_hcd drm_kms_helper =
drm r8169 nvme usbcore realtek nvme_core sp5100_tco mdio_devres watchdog vi=
deo libphy crc32_pclmul i2c_piix4 crc16 usb_common nvme_auth crc32c_intel i=
2c_smbus wmi button
[Di Okt  7 13:03:51 2025] ---[ end trace 0000000000000000 ]---
[Di Okt  7 13:03:51 2025] netfs: Can't donate prior to front
[Di Okt  7 13:03:51 2025] R=3D00003014[e] s=3D52000-57fff 0/6000/6000
[Di Okt  7 13:03:51 2025] folio: 50000-57fff
[Di Okt  7 13:03:51 2025] donated: prev=3D0 next=3D0
[Di Okt  7 13:03:51 2025] s=3D52000 av=3D6000 part=3D6000
[Di Okt  7 13:03:51 2025] ------------[ cut here ]------------
[Di Okt  7 13:03:51 2025] kernel BUG at fs/netfs/read_collect.c:316!
[Di Okt  7 13:03:51 2025] Oops: invalid opcode: 0000 [#5] PREEMPT SMP NOPTI
[Di Okt  7 13:03:51 2025] CPU: 8 UID: 0 PID: 129 Comm: kworker/u64:15 Taint=
ed: G      D            6.12.48+deb13-amd64 #1  Debian 6.12.48-1
[Di Okt  7 13:03:51 2025] Tainted: [D]=3DDIE
[Di Okt  7 13:03:51 2025] Hardware name: LENOVO 11JN000JGE/32E4, BIOS M47KT=
26A 11/23/2022
[Di Okt  7 13:03:51 2025] Workqueue: nfsiod rpc_async_release [sunrpc]
[Di Okt  7 13:03:51 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:51 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:51 2025] RSP: 0018:ffff97b3c05ebd58 EFLAGS: 00010246
[Di Okt  7 13:03:51 2025] RAX: 0000000000000019 RBX: ffff8c068a065140 RCX: =
0000000000000027
[Di Okt  7 13:03:51 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e621780
[Di Okt  7 13:03:51 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05ebbe8
[Di Okt  7 13:03:51 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c0686c273e8
[Di Okt  7 13:03:51 2025] R13: 0000000000008000 R14: ffff8c0686c273e8 R15: =
0000000000052000
[Di Okt  7 13:03:51 2025] FS:  0000000000000000(0000) GS:ffff8c098e600000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:51 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:51 2025] CR2: 00000be403e34fe0 CR3: 000000015a2c2000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:51 2025] PKRU: 55555554
[Di Okt  7 13:03:51 2025] Call Trace:
[Di Okt  7 13:03:51 2025]  <TASK>
[Di Okt  7 13:03:51 2025]  netfs_read_subreq_terminated+0x2ab/0x3e0 [netfs]
[Di Okt  7 13:03:51 2025]  nfs_netfs_read_completion+0x9c/0xc0 [nfs]
[Di Okt  7 13:03:51 2025]  nfs_read_completion+0xf6/0x130 [nfs]
[Di Okt  7 13:03:51 2025]  rpc_free_task+0x39/0x60 [sunrpc]
[Di Okt  7 13:03:51 2025]  rpc_async_release+0x2f/0x40 [sunrpc]
[Di Okt  7 13:03:51 2025]  process_one_work+0x177/0x330
[Di Okt  7 13:03:51 2025]  worker_thread+0x251/0x390
[Di Okt  7 13:03:51 2025]  ? __pfx_worker_thread+0x10/0x10
[Di Okt  7 13:03:51 2025]  kthread+0xd2/0x100
[Di Okt  7 13:03:51 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:51 2025]  ret_from_fork+0x34/0x50
[Di Okt  7 13:03:51 2025]  ? __pfx_kthread+0x10/0x10
[Di Okt  7 13:03:51 2025]  ret_from_fork_asm+0x1a/0x30
[Di Okt  7 13:03:51 2025]  </TASK>
[Di Okt  7 13:03:51 2025] Modules linked in: cachefiles nfsv3 rpcsec_gss_kr=
b5 nfsv4 dns_resolver nfs netfs nft_chain_nat xt_MASQUERADE nf_nat nf_connt=
rack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c wireguard=
 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 curve25519_x86_64 libcur=
ve25519_generic libchacha vxlan ip6_udp_tunnel udp_tunnel bridge stp llc bt=
usb btrtl btintel btbcm btmtk bluetooth joydev qrtr nfsd auth_rpcgss binfmt=
_misc nfs_acl lockd grace nls_ascii nls_cp437 sunrpc vfat fat amd_atl intel=
_rapl_msr intel_rapl_common rtw88_8822ce rtw88_8822c edac_mce_amd rtw88_pci=
 snd_sof_amd_rembrandt rtw88_core kvm_amd snd_sof_amd_acp snd_sof_pci snd_s=
of_xtensa_dsp mac80211 snd_hda_codec_realtek snd_sof kvm snd_hda_codec_gene=
ric snd_sof_utils snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core =
snd_hda_intel snd_intel_dspcfg libarc4 snd_compress irqbypass snd_intel_sdw=
_acpi snd_pcm_dmaengine crct10dif_pclmul snd_hda_codec snd_pci_ps ghash_clm=
ulni_intel snd_rpl_pci_acp6x cfg80211 sha512_ssse3 snd_hda_core
[Di Okt  7 13:03:51 2025]  snd_acp_pci snd_acp_legacy_common sha256_ssse3 s=
nd_hwdep snd_pci_acp6x sha1_ssse3 snd_pcm aesni_intel ee1004 gf128mul wmi_b=
mof snd_pci_acp5x crypto_simd think_lmi snd_timer snd_rn_pci_acp3x cryptd f=
irmware_attributes_class snd_acp_config rapl snd snd_soc_acpi k10temp ccp p=
cspkr snd_pci_acp3x rfkill soundcore evdev parport_pc ppdev lp parport efi_=
pstore configfs nfnetlink efivarfs ip_tables x_tables autofs4 ext4 mbcache =
jbd2 crc32c_generic hid_plantronics hid_generic usbhid hid amdgpu dm_mod am=
dxcp drm_exec gpu_sched drm_buddy i2c_algo_bit drm_suballoc_helper drm_disp=
lay_helper cec rc_core drm_ttm_helper xhci_pci ttm xhci_hcd drm_kms_helper =
drm r8169 nvme usbcore realtek nvme_core sp5100_tco mdio_devres watchdog vi=
deo libphy crc32_pclmul i2c_piix4 crc16 usb_common nvme_auth crc32c_intel i=
2c_smbus wmi button
[Di Okt  7 13:03:51 2025] ---[ end trace 0000000000000000 ]---
[Di Okt  7 13:03:51 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:51 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:51 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:51 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:51 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:51 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:51 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:51 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:51 2025] FS:  0000000000000000(0000) GS:ffff8c098e480000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:51 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:51 2025] CR2: 00007f62f83d2000 CR3: 00000001ba55a000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:51 2025] PKRU: 55555554
[Di Okt  7 13:03:51 2025] RIP: 0010:netfs_consume_read_data.isra.0+0xb79/0x=
b80 [netfs]
[Di Okt  7 13:03:51 2025] Code: 48 89 ea 31 f6 48 c7 c7 96 d5 61 c2 e8 30 8=
e 7f d2 48 8b 4c 24 10 4c 89 fe 48 8b 54 24 20 48 c7 c7 b2 d5 61 c2 e8 17 8=
e 7f d2 <0f> 0b 90 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
[Di Okt  7 13:03:51 2025] RSP: 0018:ffff97b3c05abd58 EFLAGS: 00010246
[Di Okt  7 13:03:51 2025] RAX: 0000000000000019 RBX: ffff8c071b60cfc0 RCX: =
0000000000000027
[Di Okt  7 13:03:51 2025] RDX: 0000000000000000 RSI: 0000000000000001 RDI: =
ffff8c098e921780
[Di Okt  7 13:03:51 2025] RBP: 0000000000000000 R08: 0000000000000000 R09: =
ffff97b3c05abbe8
[Di Okt  7 13:03:51 2025] R10: ffffffff95eb43a8 R11: 0000000000000003 R12: =
ffff8c06c6c23168
[Di Okt  7 13:03:51 2025] R13: 0000000000004000 R14: ffff8c06c6c23168 R15: =
00000000000da000
[Di Okt  7 13:03:51 2025] FS:  0000000000000000(0000) GS:ffff8c098e600000(0=
000) knlGS:0000000000000000
[Di Okt  7 13:03:51 2025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Di Okt  7 13:03:51 2025] CR2: 00000be403e34fe0 CR3: 000000015a2c2000 CR4: =
0000000000f50ef0
[Di Okt  7 13:03:51 2025] PKRU: 55555554

Mit freundlichen Gr=C3=BCssen

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From: xu xin <[email-masked]>

To reproduce the issue mentioned by [1], this add a setting of pages_to_scan
and sleep_millisecs at the start of test_prctl_fork_exec(). The main change
is just raise the scanning frequency of ksmd.

[1] https://lore.kernel.org/all/[email-masked]/

Signed-off-by: xu xin <[email-masked]>
---
 .../selftests/mm/ksm_functional_tests.c       | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c
index ac136f04b8d6..95afa5cfc062 100644
--- a/tools/testing/selftests/mm/ksm_functional_tests.c
+++ b/tools/testing/selftests/mm/ksm_functional_tests.c
@@ -38,6 +38,8 @@ enum ksm_merge_mode {
 };

 static int mem_fd;
+static int pages_to_scan_fd;
+static int sleep_millisecs_fd;
 static int pagemap_fd;
 static size_t pagesize;

@@ -493,6 +495,46 @@ static void test_prctl_fork(void)
 	ksft_test_result_pass("PR_SET_MEMORY_MERGE value is inherited\n");
 }

+static int start_ksmd_and_set_frequency(char *pages_to_scan, char *sleep_ms)
+{
+	int ksm_fd;
+
+	ksm_fd = open("/sys/kernel/mm/ksm/run", O_RDWR);
+	if (ksm_fd < 0)
+		return -errno;
+
+	if (write(ksm_fd, "1", 1) != 1)
+		return -errno;
+
+	if (write(pages_to_scan_fd, pages_to_scan, strlen(pages_to_scan)) <= 0)
+		return -errno;
+
+	if (write(sleep_millisecs_fd, sleep_ms, strlen(sleep_ms)) <= 0)
+		return -errno;
+
+	return 0;
+}
+
+static int stop_ksmd_and_restore_frequency(void)
+{
+	int ksm_fd;
+
+	ksm_fd = open("/sys/kernel/mm/ksm/run", O_RDWR);
+	if (ksm_fd < 0)
+		return -errno;
+
+	if (write(ksm_fd, "2", 1) != 1)
+		return -errno;
+
+	if (write(pages_to_scan_fd, "100", 3) <= 0)
+		return -errno;
+
+	if (write(sleep_millisecs_fd, "20", 2) <= 0)
+		return -errno;
+
+	return 0;
+}
+
 static void test_prctl_fork_exec(void)
 {
 	int ret, status;
@@ -500,6 +542,9 @@ static void test_prctl_fork_exec(void)

 	ksft_print_msg("[RUN] %s\n", __func__);

+	if (start_ksmd_and_set_frequency("2000", "0"))
+		ksft_test_result_fail("set ksmd's scanning frequency failed\n");
+
 	ret = prctl(PR_SET_MEMORY_MERGE, 1, 0, 0, 0);
 	if (ret < 0 && errno == EINVAL) {
 		ksft_test_result_skip("PR_SET_MEMORY_MERGE not supported\n");
@@ -542,6 +587,11 @@ static void test_prctl_fork_exec(void)
 		return;
 	}

+	if (stop_ksmd_and_restore_frequency()) {
+		ksft_test_result_fail("restore ksmd frequency failed\n");
+		return;
+	}
+
 	ksft_test_result_pass("PR_SET_MEMORY_MERGE value is inherited\n");
 }

@@ -656,6 +706,13 @@ static void init_global_file_handles(void)
 		ksft_exit_skip("open(\"/proc/self/pagemap\") failed\n");
 	if (ksm_get_self_merging_pages() < 0)
 		ksft_exit_skip("accessing \"/proc/self/ksm_merging_pages\") failed\n");
+
+	pages_to_scan_fd = open("/sys/kernel/mm/ksm/pages_to_scan", O_RDWR);
+	if (pages_to_scan_fd < 0)
+		ksft_exit_fail_msg("opening /sys/kernel/mm/ksm/pages_to_scan failed\n");
+	sleep_millisecs_fd = open("/sys/kernel/mm/ksm/sleep_millisecs", O_RDWR);
+	if (sleep_millisecs_fd < 0)
+		ksft_exit_fail_msg("opening /sys/kernel/mm/ksm/sleep_millisecs failed\n");
 }

 int main(int argc, char **argv)
-- 
2.25.1

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From: Shenghao Ding <[email-masked]>
To: <[email-masked]>
CC: <[email-masked]>, <[email-masked]>,
        <[email-masked]>, <[email-masked]>,
        <[email-masked]>, <[email-masked]>,
        <[email-masked]>, <[email-masked]>, <[email-masked]>,
        Shenghao Ding
	<[email-masked]>
Subject: [PATCH v1] ALSA: hda/tas2781: Enable init_profile_id for device initialization
Date: Tue, 7 Oct 2025 18:37:08 +0800
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                             author's domain
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SpamTally: Final spam score: 0

Optimize the time consumption of profile switching, init_profile saves
the common settings of different profiles, such as the dsp coefficients,
etc, which can greatly reduce the profile switching time comsumption and
remove the repetitive settings.

Fixes: e83dcd139e77 ("ASoC: tas2781: Add keyword "init" in profile section")
Signed-off-by: Shenghao Ding <[email-masked]>
---
 sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
index 4dea442d8c30..a126f04c3ed7 100644
--- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
+++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
@@ -474,6 +474,12 @@ static void tasdevice_dspfw_init(void *context)
 	if (tas_priv->fmw->nr_configurations > 0)
 		tas_priv->cur_conf = 0;
 
+	/* Init common setting for different audio profiles */
+	if (tas_priv->rcabin.init_profile_id >= 0)
+		tasdevice_select_cfg_blk(tas_priv,
+			tas_priv->rcabin.init_profile_id,
+			TASDEVICE_BIN_BLK_PRE_POWER_UP);
+
 	/* If calibrated data occurs error, dsp will still works with default
 	 * calibrated data inside algo.
 	 */
@@ -770,6 +776,12 @@ static int tas2781_system_resume(struct device *dev)
 	tasdevice_reset(tas_hda->priv);
 	tasdevice_prmg_load(tas_hda->priv, tas_hda->priv->cur_prog);
 
+	/* Init common setting for different audio profiles */
+	if (tas_hda->priv->rcabin.init_profile_id >= 0)
+		tasdevice_select_cfg_blk(tas_hda->priv,
+			tas_hda->priv->rcabin.init_profile_id,
+			TASDEVICE_BIN_BLK_PRE_POWER_UP);
+
 	if (tas_hda->priv->playback_started)
 		tasdevice_tuning_switch(tas_hda->priv, 0);
 
-- 
2.43.0

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Subject: Re: [PATCH net v3 1/1] net: usb: asix: hold PM usage ref to avoid
 PM/MDIO
 + RTNL deadlock
From: [email-masked]
Date: Tue, 07 Oct 2025 11:00:07 +0000
To: Oleksij Rempel <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <[email-masked]>:

On Sun,  5 Oct 2025 10:12:03 +0200 you wrote:
> Prevent USB runtime PM (autosuspend) for AX88772* in bind.
> 
> usbnet enables runtime PM (autosuspend) by default, so disabling it via
> the usb_driver flag is ineffective. On AX88772B, autosuspend shows no
> measurable power saving with current driver (no link partner, admin
> up/down). The ~0.453 W -> ~0.248 W drop on v6.1 comes from phylib powering
> the PHY off on admin-down, not from USB autosuspend.
> 
> [...]

Here is the summary with links:
  - [net,v3,1/1] net: usb: asix: hold PM usage ref to avoid PM/MDIO + RTNL deadlock
    https://git.kernel.org/netdev/net/c/3d3c4cd5c62f

You are awesome, thank you!
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Deet-doot-dot, I am a bot.
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Date: Tue, 7 Oct 2025 11:57:17 +0100
Subject: Re: [PATCH] ALSA: hda: Fix missing pointer check in
 hda_component_manager_init function
To: Denis Arefev <[email-masked]>, David Rhodes <[email-masked]>
Cc: Richard Fitzgerald <[email-masked]>,
        Jaroslav Kysela <[email-masked]>, Takashi Iwai <[email-masked]>,
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From: Stefan Binding <[email-masked]>
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On 07/10/2025 09:39, Denis Arefev wrote:
> The __component_match_add function may assign the 'matchptr' pointer
> the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced.
>
> The call stack leading to the error looks like this: 
>
> hda_component_manager_init
> |-> component_match_add
>     |-> component_match_add_release
>         |-> __component_match_add ( ... ,**matchptr, ... )
>             |-> *matchptr = ERR_PTR(-ENOMEM);       // assign 
> |-> component_master_add_with_match( ...  match)
>     |-> component_match_realloc(match, match->num); // dereference
>
> Add IS_ERR() check to prevent the crash.
>
> Found by Linux Verification Center (linuxtesting.org) with SVACE.          
>
> Fixes: fd895a74dc1d ("ALSA: hda: realtek: Move hda_component implementation to module")
> Cc: [email-masked]
> Signed-off-by: Denis Arefev <[email-masked]>
> ---
>  sound/hda/codecs/side-codecs/hda_component.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/sound/hda/codecs/side-codecs/hda_component.c b/sound/hda/codecs/side-codecs/hda_component.c
> index 71860e2d6377..84ddbab660e3 100644
> --- a/sound/hda/codecs/side-codecs/hda_component.c
> +++ b/sound/hda/codecs/side-codecs/hda_component.c
> @@ -181,6 +181,8 @@ int hda_component_manager_init(struct hda_codec *cdc,
>  		sm->match_str = match_str;
>  		sm->index = i;
>  		component_match_add(dev, &match, hda_comp_match_dev_name, sm);
> +		if (IS_ERR(match))
> +			return PTR_ERR(match);

Would be good to print something to log an error, since otherwise this fails silently.

Thanks,

Stefan

>  	}
>  
>  	ret = component_master_add_with_match(dev, ops, match);

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To: David Rhodes <[email-masked]>
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Subject: [PATCH] ALSA: hda: Fix missing pointer check in hda_component_manager_init function
Date: Tue,  7 Oct 2025 11:39:57 +0300
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The __component_match_add function may assign the 'matchptr' pointer
the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced.

The call stack leading to the error looks like this: 

hda_component_manager_init
|-> component_match_add
    |-> component_match_add_release
        |-> __component_match_add ( ... ,**matchptr, ... )
            |-> *matchptr = ERR_PTR(-ENOMEM);       // assign 
|-> component_master_add_with_match( ...  match)
    |-> component_match_realloc(match, match->num); // dereference

Add IS_ERR() check to prevent the crash.

Found by Linux Verification Center (linuxtesting.org) with SVACE.          

Fixes: fd895a74dc1d ("ALSA: hda: realtek: Move hda_component implementation to module")
Cc: [email-masked]
Signed-off-by: Denis Arefev <[email-masked]>
---
 sound/hda/codecs/side-codecs/hda_component.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/hda/codecs/side-codecs/hda_component.c b/sound/hda/codecs/side-codecs/hda_component.c
index 71860e2d6377..84ddbab660e3 100644
--- a/sound/hda/codecs/side-codecs/hda_component.c
+++ b/sound/hda/codecs/side-codecs/hda_component.c
@@ -181,6 +181,8 @@ int hda_component_manager_init(struct hda_codec *cdc,
 		sm->match_str = match_str;
 		sm->index = i;
 		component_match_add(dev, &match, hda_comp_match_dev_name, sm);
+		if (IS_ERR(match))
+			return PTR_ERR(match);
 	}
 
 	ret = component_master_add_with_match(dev, ops, match);
-- 
2.43.0

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Date: Tue, 07 Oct 2025 10:48:17 +0200
From: Takashi Iwai <[email-masked]>
To: Denis Arefev <[email-masked]>
Cc: David Rhodes <[email-masked]>,
	Richard Fitzgerald <[email-masked]>,
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Subject: Re: [PATCH] ALSA: hda: Fix missing pointer check in hda_component_manager_init function
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On Tue, 07 Oct 2025 10:39:57 +0200,
Denis Arefev wrote:
> 
> The __component_match_add function may assign the 'matchptr' pointer
> the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced.
> 
> The call stack leading to the error looks like this: 
> 
> hda_component_manager_init
> |-> component_match_add
>     |-> component_match_add_release
>         |-> __component_match_add ( ... ,**matchptr, ... )
>             |-> *matchptr = ERR_PTR(-ENOMEM);       // assign 
> |-> component_master_add_with_match( ...  match)
>     |-> component_match_realloc(match, match->num); // dereference
> 
> Add IS_ERR() check to prevent the crash.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.          
> 
> Fixes: fd895a74dc1d ("ALSA: hda: realtek: Move hda_component implementation to module")
> Cc: [email-masked]
> Signed-off-by: Denis Arefev <[email-masked]>

Thanks for the patch.

The Fixes tag isn't 100% correct, though; the given commit just moves
the code into another file, and the lack of the return value from
component_match_add() was present even before that commit, too.

Takashi

> ---
>  sound/hda/codecs/side-codecs/hda_component.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/hda/codecs/side-codecs/hda_component.c b/sound/hda/codecs/side-codecs/hda_component.c
> index 71860e2d6377..84ddbab660e3 100644
> --- a/sound/hda/codecs/side-codecs/hda_component.c
> +++ b/sound/hda/codecs/side-codecs/hda_component.c
> @@ -181,6 +181,8 @@ int hda_component_manager_init(struct hda_codec *cdc,
>  		sm->match_str = match_str;
>  		sm->index = i;
>  		component_match_add(dev, &match, hda_comp_match_dev_name, sm);
> +		if (IS_ERR(match))
> +			return PTR_ERR(match);
>  	}
>  
>  	ret = component_master_add_with_match(dev, ops, match);
> -- 
> 2.43.0
> 

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Date: Tue, 7 Oct 2025 11:49:16 +0200
Subject: Re: [PATCH v2 03/14] iommu/exynos: fix device leak on of_xlate()
To: Johan Hovold <[email-masked]>, Joerg Roedel <[email-masked]>, Will
	Deacon <[email-masked]>
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From: Marek Szyprowski <[email-masked]>
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On 07.10.2025 11:43, Johan Hovold wrote:
> Make sure to drop the reference taken to the iommu platform device when
> looking up its driver data during of_xlate().
>
> Note that commit 1a26044954a6 ("iommu/exynos: add missing put_device()
> call in exynos_iommu_of_xlate()") fixed the leak in a couple of error
> paths, but the reference is still leaking on success.
>
> Fixes: aa759fd376fb ("iommu/exynos: Add callback for initializing devices from device tree")
> Cc: [email-masked]	# 4.2: 1a26044954a6
> Cc: Marek Szyprowski <[email-masked]>
> Cc: Yu Kuai <[email-masked]>
> Acked-by: Robin Murphy <[email-masked]>
> Signed-off-by: Johan Hovold <[email-masked]>
Acked-by: Marek Szyprowski <[email-masked]>
> ---
>   drivers/iommu/exynos-iommu.c | 9 +++------
>   1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index b6edd178fe25..ce9e935cb84c 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -1446,17 +1446,14 @@ static int exynos_iommu_of_xlate(struct device *dev,
>   		return -ENODEV;
>   
>   	data = platform_get_drvdata(sysmmu);
> -	if (!data) {
> -		put_device(&sysmmu->dev);
> +	put_device(&sysmmu->dev);
> +	if (!data)
>   		return -ENODEV;
> -	}
>   
>   	if (!owner) {
>   		owner = kzalloc(sizeof(*owner), GFP_KERNEL);
> -		if (!owner) {
> -			put_device(&sysmmu->dev);
> +		if (!owner)
>   			return -ENOMEM;
> -		}
>   
>   		INIT_LIST_HEAD(&owner->controllers);
>   		mutex_init(&owner->rpm_lock);

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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From: xu xin <[email-masked]>

This series aim to fix exec/fork inheritance. See the detailed description
of issue at the following patch.

PATCH 1: the patch to fix the issue.
PATCH 2: a reproduce program or testcase.

xu xin (2):
  mm/ksm: fix exec/fork inheritance support for prctl
  selftests: update ksm inheritation tests for prctl fork/exec

 include/linux/ksm.h                           |  4 +-
 mm/ksm.c                                      | 20 ++++++-
 .../selftests/mm/ksm_functional_tests.c       | 57 +++++++++++++++++++
 3 files changed, 76 insertions(+), 5 deletions(-)

-- 
2.25.1

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From: xu xin <[email-masked]>

Background
==========

The commit d7597f59d1d33 ("mm: add new api to enable ksm per process") introduce
MMF_VM_MERGE_ANY for mm->flags, and allow user to set it by prctl() so that the
process's VMAs are forcely scanned by ksmd. Sequently, the commit 3c6f33b7273a
("mm/ksm: support fork/exec for prctl") support inheritsingMMF_VM_MERGE_ANY flag
when a task calls execve(). Lastly, The commit 3a9e567ca45fb
("mm/ksm: fix ksm exec support for prctl") fixed the issue that ksmd doesn't scan
the mm_struct with MMF_VM_MERGE_ANY by adding the mm_slot to ksm_mm_head
in __bprm_mm_init().

Problem
=======

In some extreme scenarios, however, this inheritance of MMF_VM_MERGE_ANY during
exec/fork can fail. For example, when the scanning frequency of ksmd is tuned
extremely high, a process carrying MMF_VM_MERGE_ANY may still fail to pass it to
the newly exec'd process. This happens because ksm_execve() is executed too early
in the do_execve flow (prematurely adding the new mm_struct to the ksm_mm_slot list).

As a result, before do_execve completes, ksmd may have already performed a scan and
found that this new mm_struct has no VM_MERGEABLE VMAs, thus clearing its
MMF_VM_MERGE_ANY flag. Consequently, when the new program executes, the flag
MMF_VM_MERGE_ANY inheritance missed.

Root reason
===========

The commit d7597f59d1d33 ("mm: add new api to enable ksm per process") clear the
flag MMF_VM_MERGE_ANY when ksmd found no VM_MERGEABLE VMAs.

Solution
========

First, Don't clear MMF_VM_MERGE_ANY when ksmd found no VM_MERGEABLE VMAs, because perhaps
their mm_struct has just been added to ksm_mm_slot list, and its process has not yet
officially started running or has not yet performed mmap/brk to allocate anonymous VMAS.

Second, recheck MMF_VM_MERGEABLE again if a process takes MMF_VM_MERGE_ANY, and create
a mm_slot and join it into ksm_scan_list again.

Fixes: 3c6f33b7273a ("mm/ksm: support fork/exec for prctl")
Fixes: d7597f59d1d3 ("mm: add new api to enable ksm per process")
Signed-off-by: xu xin <[email-masked]>
Cc: [email-masked]
Cc: Stefan Roesch <[email-masked]>
Cc: David Hildenbrand <[email-masked]>
Cc: Jinjiang Tu <[email-masked]>
Cc: Wang Yaxin <[email-masked]>
---
 include/linux/ksm.h |  4 ++--
 mm/ksm.c            | 20 +++++++++++++++++---
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 067538fc4d58..c982694c987b 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -17,7 +17,7 @@
 #ifdef CONFIG_KSM
 int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
 		unsigned long end, int advice, vm_flags_t *vm_flags);
-vm_flags_t ksm_vma_flags(const struct mm_struct *mm, const struct file *file,
+vm_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file,
 			 vm_flags_t vm_flags);
 int ksm_enable_merge_any(struct mm_struct *mm);
 int ksm_disable_merge_any(struct mm_struct *mm);
@@ -103,7 +103,7 @@ bool ksm_process_mergeable(struct mm_struct *mm);

 #else  /* !CONFIG_KSM */

-static inline vm_flags_t ksm_vma_flags(const struct mm_struct *mm,
+static inline vm_flags_t ksm_vma_flags(struct mm_struct *mm,
 		const struct file *file, vm_flags_t vm_flags)
 {
 	return vm_flags;
diff --git a/mm/ksm.c b/mm/ksm.c
index 04019a15b25d..19efe3d41c75 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2617,8 +2617,14 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
 		spin_unlock(&ksm_mmlist_lock);

 		mm_slot_free(mm_slot_cache, mm_slot);
+		/*
+		 * Only clear MMF_VM_MERGEABLE. We must not clear
+		 * MMF_VM_MERGE_ANY, because for those MMF_VM_MERGE_ANY process,
+		 * perhaps their mm_struct has just been added to ksm_mm_slot
+		 * list, and its process has not yet officially started running
+		 * or has not yet performed mmap/brk to allocate anonymous VMAS.
+		 */
 		mm_flags_clear(MMF_VM_MERGEABLE, mm);
-		mm_flags_clear(MMF_VM_MERGE_ANY, mm);
 		mmap_read_unlock(mm);
 		mmdrop(mm);
 	} else {
@@ -2736,12 +2742,20 @@ static int __ksm_del_vma(struct vm_area_struct *vma)
  *
  * Returns: @vm_flags possibly updated to mark mergeable.
  */
-vm_flags_t ksm_vma_flags(const struct mm_struct *mm, const struct file *file,
+vm_flags_t ksm_vma_flags(struct mm_struct *mm, const struct file *file,
 			 vm_flags_t vm_flags)
 {
 	if (mm_flags_test(MMF_VM_MERGE_ANY, mm) &&
-	    __ksm_should_add_vma(file, vm_flags))
+	    __ksm_should_add_vma(file, vm_flags)) {
 		vm_flags |= VM_MERGEABLE;
+		/*
+		 * Generally, the flags here always include MMF_VM_MERGEABLE.
+		 * However, in rare cases, this flag may be cleared by ksmd who
+		 * scans a cycle without finding any mergeable vma.
+		 */
+		if (unlikely(!mm_flags_test(MMF_VM_MERGEABLE, mm)))
+			__ksm_enter(mm);
+	}

 	return vm_flags;
 }
-- 
2.25.1

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Date: Mon, 6 Oct 2025 21:42:04 -0400
Subject: Re: [PATCH] scsi: fix shift out-of-bounds in sg_build_indirect The
 num variable is set to 0. The variable num gets its value from
 scatter_elem_sz. However the minimum value of scatter_elem_sz is PAGE_SHIFT.
 So setting num to PAGE_SIZE when num < PAGE_SIZE.
To: Kshitij Paranjape <[email-masked]>,
 "Martin K . Petersen" <[email-masked]>
Cc: Doug Gilbert <[email-masked]>,
 "James E . J . Bottomley" <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked]
From: David Hunter <[email-masked]>
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On 10/6/25 13:46, Kshitij Paranjape wrote:
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=270f1c719ee7baab9941
> Signed-off-by: Kshitij Paranjape <[email-masked]>

Hey Kshitij,

the formatting didn't quite work out the way you intended. For the next
version, please try to send it to Shuah and I first.

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From: Mohammad Rafi Shaik <[email-masked]>
To: Liam Girdwood <[email-masked]>, Mark Brown <[email-masked]>,
        Jaroslav Kysela <[email-masked]>, Takashi Iwai <[email-masked]>,
        Srinivas Kandagatla <[email-masked]>
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked],
        [email-masked], [email-masked]
Subject: [PATCH v1] ASoC: soc-pcm: Fix mute and unmute control for non-dynamic DAI links
Date: Tue,  7 Oct 2025 08:03:25 +0530
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In setups where the same codec DAI is reused across multiple DAI
links, mute controls via `snd_soc_dai_digital_mute()` is skipped for
non-dynamic links. The trigger operations are not invoked when
`dai_link->dynamic == 0`, and mute controls is currently conditioned
only on `snd_soc_dai_mute_is_ctrled_at_trigger()`. This patch ensures
that mute and unmute is applied explicitly for non-dynamic links.

Fixes: f0220575e65a ("ASoC: soc-dai: add flag to mute and unmute stream during trigger")
Cc: [email-masked]
Signed-off-by: Mohammad Rafi Shaik <[email-masked]>
---
 sound/soc/soc-pcm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 2c21fd528afd..4ed829b49bc2 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -949,7 +949,7 @@ static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
 			SND_SOC_DAPM_STREAM_START);
 
 	for_each_rtd_dais(rtd, i, dai) {
-		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
+		if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
 			snd_soc_dai_digital_mute(dai, 0, substream->stream);
 	}
 
@@ -1007,7 +1007,7 @@ static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
 			soc_pcm_set_dai_params(dai, NULL);
 
 		if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
-			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai))
+			if (!snd_soc_dai_mute_is_ctrled_at_trigger(dai) || !rtd->dai_link->dynamic)
 				snd_soc_dai_digital_mute(dai, 1, substream->stream);
 		}
 	}
-- 
2.34.1

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Subject: [PATCH] f2fs: fix wrong block mapping for multi-devices
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Assuming the disk layout as below,

disk0: 0            --- 0x00035abfff
disk1: 0x00035ac000 --- 0x00037abfff
disk2: 0x00037ac000 --- 0x00037ebfff

and we want to read data from offset=13568 having len=128 across the block
devices, we can illustrate the block addresses like below.

0 .. 0x00037ac000 ------------------- 0x00037ebfff, 0x00037ec000 -------
          |          ^            ^                                ^
          |   fofs   0            13568                            13568+128
          |       ------------------------------------------------------
          |   LBA    0x37e8aa9    0x37ebfa9                        0x37ec029
          --- map    0x3caa9      0x3ffa9

In this example, we should give the relative map of the target block device
ranging from 0x3caa9 to 0x3ffa9 where the length should be calculated by
0x37ebfff + 1 - 0x37ebfa9.

In the below equation, however, map->m_pblk was supposed to be the original
address instead of the one from the target block address.

 - map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk);

Cc: [email-masked]
Fixes: 71f2c8206202 ("f2fs: multidevice: support direct IO")
Signed-off-by: Jaegeuk Kim <[email-masked]>
---
 fs/f2fs/data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ef38e62cda8f..775aa4f63aa3 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1497,8 +1497,8 @@ static bool f2fs_map_blocks_cached(struct inode *inode,
 		struct f2fs_dev_info *dev = &sbi->devs[bidx];
 
 		map->m_bdev = dev->bdev;
-		map->m_pblk -= dev->start_blk;
 		map->m_len = min(map->m_len, dev->end_blk + 1 - map->m_pblk);
+		map->m_pblk -= dev->start_blk;
 	} else {
 		map->m_bdev = inode->i_sb->s_bdev;
 	}
-- 
2.51.0.710.ga91ca5db03-goog

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Date: Tue, 7 Oct 2025 07:00:08 +0200
From: Mika Westerberg <[email-masked]>
To: Brian Norris <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
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Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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Hi,

On Mon, Oct 06, 2025 at 11:32:38AM -0700, Brian Norris wrote:
> Hi Mika,
> 
> On Mon, Oct 06, 2025 at 03:52:22PM +0200, Mika Westerberg wrote:
> > On Fri, Oct 03, 2025 at 03:40:09PM -0700, Brian Norris wrote:
> > > From: Brian Norris <[email-masked]>
> > > 
> > > When transitioning to D3cold, __pci_set_power_state() will first
> > > transition a device to D3hot. If the device was already in D3hot, this
> > > will add excess work:
> > > (a) read/modify/write PMCSR; and
> > > (b) excess delay (pci_dev_d3_sleep()).
> > 
> > How come the device is already in D3hot when __pci_set_power_state() is
> > called? IIRC PCI core will transition the device to low power state so that
> > it passes there the deepest possible state, and at that point the device is
> > still in D0. Then __pci_set_power_state() puts it into D3hot and then turns
> > if the power resource -> D3cold.
> > 
> > What I'm missing here?
> 
> Some PCI drivers call pci_set_power_state(..., PCI_D3hot) on their own
> when preparing for runtime or system suspend, so by the time they hit
> pci_finish_runtime_suspend(), they're in D3hot. Then, pci_target_state()
> may still pick a lower state (D3cold).

Ah, right. Thanks for clarification.

Yeah, I agree with Bjorn and Mani that those calls should go away (PCI core
does that already). That makes driver writes life simpler wrt. PCI PM.

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From: Denis Arefev <[email-masked]>
To: David Rhodes <[email-masked]>
Cc: Richard Fitzgerald <[email-masked]>,
	Jaroslav Kysela <[email-masked]>,
	Takashi Iwai <[email-masked]>,
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	[email-masked],
	[email-masked]
Subject: [PATCH] ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()
Date: Tue,  7 Oct 2025 10:38:31 +0300
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Return value of a function acpi_evaluate_dsm() is dereferenced  without
checking for NULL, but it is usually checked for this function.

acpi_evaluate_dsm() may return NULL, when acpi_evaluate_object() returns
acpi_status other than ACPI_SUCCESS, so add a check to prevent the crach.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 447106e92a0c ("ALSA: hda: cs35l41: Support mute notifications for CS35L41 HDA")
Cc: [email-masked]
Signed-off-by: Denis Arefev <[email-masked]>
---
 sound/hda/codecs/side-codecs/cs35l41_hda.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/hda/codecs/side-codecs/cs35l41_hda.c b/sound/hda/codecs/side-codecs/cs35l41_hda.c
index 37f2cdc8ce82..890ddb8cc66c 100644
--- a/sound/hda/codecs/side-codecs/cs35l41_hda.c
+++ b/sound/hda/codecs/side-codecs/cs35l41_hda.c
@@ -1426,6 +1426,8 @@ static int cs35l41_get_acpi_mute_state(struct cs35l41_hda *cs35l41, acpi_handle
 
 	if (cs35l41_dsm_supported(handle, CS35L41_DSM_GET_MUTE)) {
 		ret = acpi_evaluate_dsm(handle, &guid, 0, CS35L41_DSM_GET_MUTE, NULL);
+		if (!ret)
+			return -EINVAL;
 		mute = *ret->buffer.pointer;
 		dev_dbg(cs35l41->dev, "CS35L41_DSM_GET_MUTE: %d\n", mute);
 	}
-- 
2.43.0

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Date: Mon, 6 Oct 2025 16:13:26 -0700
From: Manivannan Sadhasivam <[email-masked]>
To: Bjorn Helgaas <[email-masked]>
Cc: Brian Norris <[email-masked]>, 
	Mika Westerberg <[email-masked]>, Bjorn Helgaas <[email-masked]>, 
	"Rafael J . Wysocki" <[email-masked]>, [email-masked], [email-masked], 
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Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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On Mon, Oct 06, 2025 at 02:33:33PM -0500, Bjorn Helgaas wrote:
> On Mon, Oct 06, 2025 at 11:32:38AM -0700, Brian Norris wrote:
> > On Mon, Oct 06, 2025 at 03:52:22PM +0200, Mika Westerberg wrote:
> > > On Fri, Oct 03, 2025 at 03:40:09PM -0700, Brian Norris wrote:
> > > > From: Brian Norris <[email-masked]>
> > > > 
> > > > When transitioning to D3cold, __pci_set_power_state() will first
> > > > transition a device to D3hot. If the device was already in D3hot, this
> > > > will add excess work:
> > > > (a) read/modify/write PMCSR; and
> > > > (b) excess delay (pci_dev_d3_sleep()).
> > > 
> > > How come the device is already in D3hot when __pci_set_power_state() is
> > > called? IIRC PCI core will transition the device to low power state so that
> > > it passes there the deepest possible state, and at that point the device is
> > > still in D0. Then __pci_set_power_state() puts it into D3hot and then turns
> > > if the power resource -> D3cold.
> > > 
> > > What I'm missing here?
> > 
> > Some PCI drivers call pci_set_power_state(..., PCI_D3hot) on their own
> > when preparing for runtime or system suspend, so by the time they hit
> > pci_finish_runtime_suspend(), they're in D3hot. Then, pci_target_state()
> > may still pick a lower state (D3cold).
> 
> We might need this change, but maybe this is also an opportunity to
> remove some of those pci_set_power_state(..., PCI_D3hot) calls from
> drivers.
> 

Agree. The PCI client drivers should have no business in opting for D3Hot in the
suspend path. It should be the other way around, they should opt-out if they
want by calling pci_save_state(), but that is also subject to discussion.

- Mani

-- 
மணிவண்ணன் சதாசிவம்

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Subject: Re: [PATCH AUTOSEL 6.17-5.4] x86/build: Remove cc-option from stack
 alignment flags
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On Mon, Oct 06, 2025 at 02:55:05PM -0700, Nathan Chancellor wrote:
>On Mon, Oct 06, 2025 at 02:17:33PM -0400, Sasha Levin wrote:
>> From: Nathan Chancellor <[email-masked]>
>>
>> [ Upstream commit d87208128a3330c0eab18301ab39bdb419647730 ]
>>
>> '-mpreferred-stack-boundary' (the GCC option) and '-mstack-alignment'
>> (the clang option) have been supported in their respective compilers for
>> some time, so it is unnecessary to check for support for them via
>> cc-option. '-mpreferred-stack-boundary=3' had a restriction on
>> '-mno-sse' until GCC 7.1 but that is irrelevant for most of the kernel,
>> which includes '-mno-sse'.
>>
>> Move to simple Kconfig checks to avoid querying the compiler for the
>> flags that it supports.
>>
>> Signed-off-by: Nathan Chancellor <[email-masked]>
>> Signed-off-by: Borislav Petkov (AMD) <[email-masked]>
>> Link: https://lore.kernel.org/[email-masked]
>> Signed-off-by: Sasha Levin <[email-masked]>
>...
>> ## Backport Status: NO
>...
>> **Dependency Analysis:**
>> - Requires minimum GCC 8.1 for x86 (introduced in v6.15 via commit
>>   a3e8fe814ad1)
>> - Requires minimum Clang 15.0.0 for x86 (commit 7861640aac52b)
>> - Both requirements are satisfied in 6.17 stable tree (verified via
>>   scripts/min-tool-version.sh)
>> - GCC 7.1+ supports `-mpreferred-stack-boundary=3` with `-msse` (per GCC
>>   commit 34fac449e121)
>...
>> ### Conclusion
>>
>> While this commit is technically safe and provides a marginal build-time
>> performance improvement by eliminating unnecessary runtime compiler
>> checks, **it does not meet the fundamental requirement for stable kernel
>> backporting**: it does not fix a bug that affects users.
>>
>> The commit is purely a cleanup that removes obsolete code after compiler
>> minimum version requirements were raised. Such cleanups belong in
>> mainline development, not stable trees, which should focus exclusively
>> on fixing bugs that impact users.
>>
>> The fact that it was auto-selected by AUTOSEL does not override the
>> documented stable kernel rules. This commit should be **rejected** from
>> stable backporting or **reverted** if already applied.
>
>Based on all of this, I would agree that it is not really suitable for
>backporting (at least not beyond 6.15, whereas the subject says back to
>5.4), so why was this still sent for review?

Sorry for the noise, I thought I dropped this one :(

-- 
Thanks,
Sasha

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Date: Mon, 6 Oct 2025 16:58:41 -0700
Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
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To: Alexander Lobakin <[email-masked]>
CC: Przemek Kitszel <[email-masked]>, Andrew Lunn
	<[email-masked]>, "David S. Miller" <[email-masked]>, "Eric
 Dumazet" <[email-masked]>, Jakub Kicinski <[email-masked]>, Paolo Abeni
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References: <[email-masked]>
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Content-Language: en-US
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--------------F5A6abojKOgN7iAzE40edZj0
Content-Type: multipart/mixed; boundary="------------9Egxja0bdnlkz5XaDO6j69mB";
 protected-headers="v1"
From: Jacob Keller <[email-masked]>
To: Alexander Lobakin <[email-masked]>
Cc: Przemek Kitszel <[email-masked]>,
 Andrew Lunn <[email-masked]>, "David S. Miller"
 <[email-masked]>, Eric Dumazet <[email-masked]>,
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>,
 Emil Tantilov <[email-masked]>,
 Willem de Bruijn <[email-masked]>,
 Sridhar Samudrala <[email-masked]>,
 Phani Burra <[email-masked]>,
 Piotr Kwapulinski <[email-masked]>,
 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>,
 Jedrzej Jagielski <[email-masked]>,
 Mateusz Polchlopek <[email-masked]>,
 Anton Nadezhdin <[email-masked]>,
 Konstantin Ilichev <[email-masked]>,
 Milena Olech <[email-masked]>, [email-masked],
 [email-masked],
 Aleksandr Loktionov <[email-masked]>,
 Samuel Salin <[email-masked]>,
 Chittim Madhu <[email-masked]>, Joshua Hay
 <[email-masked]>, [email-masked],
 Rafal Romanowski <[email-masked]>,
 Koichiro Den <[email-masked]>, Rinitha S <[email-masked]>,
 Paul Menzel <[email-masked]>
Message-ID: <[email-masked]>
Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
 ixgbe, ixgbevf)
References: <[email-masked]>
 <[email-masked]>
In-Reply-To: <[email-masked]>

--------------9Egxja0bdnlkz5XaDO6j69mB
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On 10/6/2025 8:27 AM, Alexander Lobakin wrote:
> From: Jacob Keller <[email-masked]>
> Date: Wed, 01 Oct 2025 17:14:10 -0700
>=20
>> For idpf:
>> Milena fixes a memory leak in the idpf reset logic when the driver res=
ets
>> with an outstanding Tx timestamp.
>>
>> Emil fixes a race condition in idpf_vport_stop() by using
>> test_and_clear_bit() to ensure we execute idpf_vport_stop() once.
> Patches 2-3 (at least) triggered a good bunch of compiler errors in
> Tony's queue due to that XDP and XSk support for idpf went into net-nex=
t
> already, but these patches weren't rebased and retested after that.
>=20
> Thanks,
> Olek

I've at least fixed the compile failures on whats published in Tony's
dev-queue for net and next now. Thanks for letting me know.

--------------9Egxja0bdnlkz5XaDO6j69mB--

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Subject: Re: [PATCH net v2 0/6] Intel Wired LAN Driver Updates 2025-10-01
 (idpf, ixgbe, ixgbevf)
To: Simon Horman <[email-masked]>
CC: Przemek Kitszel <[email-masked]>, Andrew Lunn
	<[email-masked]>, "David S. Miller" <[email-masked]>, "Eric
 Dumazet" <[email-masked]>, Jakub Kicinski <[email-masked]>, Paolo Abeni
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References: <[email-masked]>
 <[email-masked]>
Content-Language: en-US
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--------------kK3LN2YzGnwcDKfCxs8s50L3
Content-Type: multipart/mixed; boundary="------------qGzjPgfVbiCNeXjU5a0XsxxM";
 protected-headers="v1"
From: Jacob Keller <[email-masked]>
To: Simon Horman <[email-masked]>
Cc: Przemek Kitszel <[email-masked]>,
 Andrew Lunn <[email-masked]>, "David S. Miller"
 <[email-masked]>, Eric Dumazet <[email-masked]>,
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>,
 Emil Tantilov <[email-masked]>,
 Alexander Lobakin <[email-masked]>,
 Willem de Bruijn <[email-masked]>,
 Sridhar Samudrala <[email-masked]>,
 Phani Burra <[email-masked]>,
 Piotr Kwapulinski <[email-masked]>,
 Radoslaw Tyl <[email-masked]>,
 Jedrzej Jagielski <[email-masked]>,
 Anton Nadezhdin <[email-masked]>,
 Konstantin Ilichev <[email-masked]>,
 Milena Olech <[email-masked]>, [email-masked],
 [email-masked],
 Aleksandr Loktionov <[email-masked]>,
 Samuel Salin <[email-masked]>,
 Andrzej Wilczynski <[email-masked]>, [email-masked],
 Rafal Romanowski <[email-masked]>,
 Koichiro Den <[email-masked]>, Rinitha S <[email-masked]>,
 Paul Menzel <[email-masked]>
Message-ID: <[email-masked]>
Subject: Re: [PATCH net v2 0/6] Intel Wired LAN Driver Updates 2025-10-01
 (idpf, ixgbe, ixgbevf)
References: <[email-masked]>
 <[email-masked]>
In-Reply-To: <[email-masked]>

--------------qGzjPgfVbiCNeXjU5a0XsxxM
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

On 10/4/2025 9:56 AM, Simon Horman wrote:
> On Fri, Oct 03, 2025 at 06:09:43PM -0700, Jacob Keller wrote:
>> For idpf:
>> Milena fixes a memory leak in the idpf reset logic when the driver res=
ets
>> with an outstanding Tx timestamp.
>>
>> For ixgbe and ixgbevf:
>> Jedrzej fixes an issue with reporting link speed on E610 VFs.
>>
>> Jedrzej also fixes the VF mailbox API incompatibilities caused by the
>> confusion with API v1.4, v1.5, and v1.6. The v1.4 API introduced IPSEC=

>> offload, but this was only supported on Linux hosts. The v1.5 API
>> introduced a new mailbox API which is necessary to resolve issues on E=
SX
>> hosts. The v1.6 API introduced a new link management API for E610. Jed=
rzej
>> introduces a new v1.7 API with a feature negotiation which enables pro=
perly
>> checking if features such as IPSEC or the ESX mailbox APIs are support=
ed.
>> This resolves issues with compatibility on different hosts, and aligns=
 the
>> API across hosts instead of having Linux require custom mailbox API
>> versions for IPSEC offload.
>>
>> Koichiro fixes a KASAN use-after-free bug in ixgbe_remove().
>>
>> Signed-off-by: Jacob Keller <[email-masked]>
>> ---
>> Changes in v2:
>> - Drop Emil's idpf_vport_open race fix for now.
>> - Add my signature.
>> - Link to v1: https://lore.kernel.org/r/20251001-jk-iwl-net-2025-10-01=
[email-masked]
>=20
> Hi Jake,
>=20
> Maybe I'm missing something simple here.
>=20
> But this series doesn't seem to apply to net due to the presence of
> commit 7a5a03869801 ("idpf: add HW timestamping statistics")

Hm. I based this on net when I created it, but I guess I was too early,
probably before a tree merge happened.

Will fix.

Thanks,
Jake

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Date: Mon, 6 Oct 2025 14:59:17 -0700
Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
 ixgbe, ixgbevf)
To: Alexander Lobakin <[email-masked]>
CC: Przemek Kitszel <[email-masked]>, Andrew Lunn
	<[email-masked]>, "David S. Miller" <[email-masked]>, "Eric
 Dumazet" <[email-masked]>, Jakub Kicinski <[email-masked]>, Paolo Abeni
	<[email-masked]>, Emil Tantilov <[email-masked]>, "Pavan Kumar
 Linga" <[email-masked]>, Willem de Bruijn <[email-masked]>,
	Sridhar Samudrala <[email-masked]>, Phani Burra
	<[email-masked]>, Piotr Kwapulinski <[email-masked]>,
	Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>,
	Jedrzej Jagielski <[email-masked]>, Mateusz Polchlopek
	<[email-masked]>, Anton Nadezhdin <[email-masked]>,
	Konstantin Ilichev <[email-masked]>, Milena Olech
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	Andrzej Wilczynski <[email-masked]>, <[email-masked]>,
	Rafal Romanowski <[email-masked]>, Koichiro Den
	<[email-masked]>, Rinitha S <[email-masked]>, Paul Menzel
	<[email-masked]>
References: <[email-masked]>
 <[email-masked]>
Content-Language: en-US
From: Jacob Keller <[email-masked]>
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--------------utoYGtJEtFrjLNN7GVSNcmxG
Content-Type: multipart/mixed; boundary="------------Wst0Vol44sAeE9RCTW4QdU6E";
 protected-headers="v1"
From: Jacob Keller <[email-masked]>
To: Alexander Lobakin <[email-masked]>
Cc: Przemek Kitszel <[email-masked]>,
 Andrew Lunn <[email-masked]>, "David S. Miller"
 <[email-masked]>, Eric Dumazet <[email-masked]>,
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>,
 Emil Tantilov <[email-masked]>,
 Pavan Kumar Linga <[email-masked]>,
 Willem de Bruijn <[email-masked]>,
 Sridhar Samudrala <[email-masked]>,
 Phani Burra <[email-masked]>,
 Piotr Kwapulinski <[email-masked]>,
 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>,
 Jedrzej Jagielski <[email-masked]>,
 Mateusz Polchlopek <[email-masked]>,
 Anton Nadezhdin <[email-masked]>,
 Konstantin Ilichev <[email-masked]>,
 Milena Olech <[email-masked]>, [email-masked],
 [email-masked],
 Aleksandr Loktionov <[email-masked]>,
 Samuel Salin <[email-masked]>,
 Chittim Madhu <[email-masked]>, Joshua Hay
 <[email-masked]>, Andrzej Wilczynski
 <[email-masked]>, [email-masked],
 Rafal Romanowski <[email-masked]>,
 Koichiro Den <[email-masked]>, Rinitha S <[email-masked]>,
 Paul Menzel <[email-masked]>
Message-ID: <[email-masked]>
Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
 ixgbe, ixgbevf)
References: <[email-masked]>
 <[email-masked]>
In-Reply-To: <[email-masked]>

--------------Wst0Vol44sAeE9RCTW4QdU6E
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

On 10/6/2025 8:27 AM, Alexander Lobakin wrote:
> From: Jacob Keller <[email-masked]>
> Date: Wed, 01 Oct 2025 17:14:10 -0700
>=20
>> For idpf:
>> Milena fixes a memory leak in the idpf reset logic when the driver res=
ets
>> with an outstanding Tx timestamp.
>>
>> Emil fixes a race condition in idpf_vport_stop() by using
>> test_and_clear_bit() to ensure we execute idpf_vport_stop() once.
> Patches 2-3 (at least) triggered a good bunch of compiler errors in
> Tony's queue due to that XDP and XSk support for idpf went into net-nex=
t
> already, but these patches weren't rebased and retested after that.
>=20
> Thanks,
> Olek

Yep, I thought I had based on this after the merge with the XDP support,
but apparently I was too early.

We have outstanding comments from Jakub on the flags changes, so I
dropped them from v2, but still have conflicts. Working on a v3 to fix th=
at.

--------------Wst0Vol44sAeE9RCTW4QdU6E--

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From - Fri Oct 17 14:26:29 2025
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From: Kairui Song <[email-masked]>
Subject: [PATCH 0/4] mm, swap: misc cleanup and bugfix
Date: Tue, 07 Oct 2025 04:02:32 +0800
To: [email-masked]
Cc: Andrew Morton <[email-masked]>, 
 Kemeng Shi <[email-masked]>, Kairui Song <[email-masked]>, 
 Nhat Pham <[email-masked]>, Baoquan He <[email-masked]>, 
 Barry Song <[email-masked]>, Chris Li <[email-masked]>, 
 Baolin Wang <[email-masked]>, 
 David Hildenbrand <[email-masked]>, 
 "Matthew Wilcox (Oracle)" <[email-masked]>, 
 Ying Huang <[email-masked]>, Kairui Song <[email-masked]>, 
 [email-masked], [email-masked]
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A few cleanups and a bugfix that are either suitable after the swap
table phase I or found during code review.

Patch 1 is a bugfix and needs to be included in the stable branch,
the rest have no behavior change.

---
Kairui Song (4):
      mm, swap: do not perform synchronous discard during allocation
      mm, swap: rename helper for setup bad slots
      mm, swap: cleanup swap entry allocation parameter
      mm/migrate, swap: drop usage of folio_index

 include/linux/swap.h |  4 ++--
 mm/migrate.c         |  4 ++--
 mm/shmem.c           |  2 +-
 mm/swap.h            | 21 -----------------
 mm/swapfile.c        | 64 ++++++++++++++++++++++++++++++++++++----------------
 mm/vmscan.c          |  4 ++--
 6 files changed, 52 insertions(+), 47 deletions(-)
---
base-commit: 53e573001f2b5168f9b65d2b79e9563a3b479c17
change-id: 20251007-swap-clean-after-swap-table-p1-b9a7635ee3fa

Best regards,
-- 
Kairui Song <[email-masked]>

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From: Kairui Song <[email-masked]>
Date: Tue, 07 Oct 2025 04:02:33 +0800
Subject: [PATCH 1/4] mm, swap: do not perform synchronous discard during
 allocation
To: [email-masked]
Cc: Andrew Morton <[email-masked]>, 
 Kemeng Shi <[email-masked]>, Kairui Song <[email-masked]>, 
 Nhat Pham <[email-masked]>, Baoquan He <[email-masked]>, 
 Barry Song <[email-masked]>, Chris Li <[email-masked]>, 
 Baolin Wang <[email-masked]>, 
 David Hildenbrand <[email-masked]>, 
 "Matthew Wilcox (Oracle)" <[email-masked]>, 
 Ying Huang <[email-masked]>, Kairui Song <[email-masked]>, 
 [email-masked], [email-masked]
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From: Kairui Song <[email-masked]>

Since commit 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation
fast path"), swap allocation is protected by a local lock, which means
we can't do any sleeping calls during allocation.

However, the discard routine is not taken well care of. When the swap
allocator failed to find any usable cluster, it would look at the
pending discard cluster and try to issue some blocking discards. It may
not necessarily sleep, but the cond_resched at the bio layer indicates
this is wrong when combined with a local lock. And the bio GFP flag used
for discard bio is also wrong (not atomic).

It's arguable whether this synchronous discard is helpful at all. In
most cases, the async discard is good enough. And the swap allocator is
doing very differently at organizing the clusters since the recent
change, so it is very rare to see discard clusters piling up.

So far, no issues have been observed or reported with typical SSD setups
under months of high pressure. This issue was found during my code
review. But by hacking the kernel a bit: adding a mdelay(100) in the
async discard path, this issue will be observable with WARNING triggered
by the wrong GFP and cond_resched in the bio layer.

So let's fix this issue in a safe way: remove the synchronous discard in
the swap allocation path. And when order 0 is failing with all cluster
list drained on all swap devices, try to do a discard following the swap
device priority list. If any discards released some cluster, try the
allocation again. This way, we can still avoid OOM due to swap failure
if the hardware is very slow and memory pressure is extremely high.

Cc: <[email-masked]>
Fixes: 1b7e90020eb77 ("mm, swap: use percpu cluster as allocation fast path")
Signed-off-by: Kairui Song <[email-masked]>
---
 mm/swapfile.c | 40 +++++++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 7 deletions(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index cb2392ed8e0e..0d1924f6f495 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1101,13 +1101,6 @@ static unsigned long cluster_alloc_swap_entry(struct swap_info_struct *si, int o
 			goto done;
 	}
 
-	/*
-	 * We don't have free cluster but have some clusters in discarding,
-	 * do discard now and reclaim them.
-	 */
-	if ((si->flags & SWP_PAGE_DISCARD) && swap_do_scheduled_discard(si))
-		goto new_cluster;
-
 	if (order)
 		goto done;
 
@@ -1394,6 +1387,33 @@ static bool swap_alloc_slow(swp_entry_t *entry,
 	return false;
 }
 
+/*
+ * Discard pending clusters in a synchronized way when under high pressure.
+ * Return: true if any cluster is discarded.
+ */
+static bool swap_sync_discard(void)
+{
+	bool ret = false;
+	int nid = numa_node_id();
+	struct swap_info_struct *si, *next;
+
+	spin_lock(&swap_avail_lock);
+	plist_for_each_entry_safe(si, next, &swap_avail_heads[nid], avail_lists[nid]) {
+		spin_unlock(&swap_avail_lock);
+		if (get_swap_device_info(si)) {
+			if (si->flags & SWP_PAGE_DISCARD)
+				ret = swap_do_scheduled_discard(si);
+			put_swap_device(si);
+		}
+		if (ret)
+			break;
+		spin_lock(&swap_avail_lock);
+	}
+	spin_unlock(&swap_avail_lock);
+
+	return ret;
+}
+
 /**
  * folio_alloc_swap - allocate swap space for a folio
  * @folio: folio we want to move to swap
@@ -1432,11 +1452,17 @@ int folio_alloc_swap(struct folio *folio, gfp_t gfp)
 		}
 	}
 
+again:
 	local_lock(&percpu_swap_cluster.lock);
 	if (!swap_alloc_fast(&entry, order))
 		swap_alloc_slow(&entry, order);
 	local_unlock(&percpu_swap_cluster.lock);
 
+	if (unlikely(!order && !entry.val)) {
+		if (swap_sync_discard())
+			goto again;
+	}
+
 	/* Need to call this even if allocation failed, for MEMCG_SWAP_FAIL. */
 	if (mem_cgroup_try_charge_swap(folio, entry))
 		goto out_free;

-- 
2.51.0

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Date: Mon, 6 Oct 2025 21:35:03 +0100
From: David Laight <[email-masked]>
To: Greg KH <[email-masked]>
Cc: Eliav Farber <[email-masked]>, [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked],
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 [email-masked], [email-masked], [email-masked],
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 [email-masked], [email-masked],
 [email-masked], [email-masked],
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 [email-masked], [email-masked],
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 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked], Linus Torvalds
 <[email-masked]>, Lorenzo Stoakes
 <[email-masked]>
Subject: Re: [PATCH v2 07/19 5.15.y] minmax: simplify and clarify
 min_t()/max_t() implementation
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On Mon, 6 Oct 2025 12:47:45 +0200
Greg KH <[email-masked]> wrote:

(I've had to trim the 'To' list to send this...)

> On Fri, Oct 03, 2025 at 12:59:54PM +0000, Eliav Farber wrote:
> > From: Linus Torvalds <[email-masked]>
> >=20
> > [ Upstream commit 017fa3e89187848fd056af757769c9e66ac3e93d ]
> >=20
> > This simplifies the min_t() and max_t() macros by no longer making them
> > work in the context of a C constant expression.
> >=20
> > That means that you can no longer use them for static initializers or
> > for array sizes in type definitions, but there were only a couple of
> > such uses, and all of them were converted (famous last words) to use
> > MIN_T/MAX_T instead.
> >=20
> > Cc: David Laight <[email-masked]>
> > Cc: Lorenzo Stoakes <[email-masked]>
> > Signed-off-by: Linus Torvalds <[email-masked]>
> > Signed-off-by: Eliav Farber <[email-masked]> =20
>=20
> Eliav, your testing infrastructure needs some work, this patch breaks
> the build on this kernel tree:
>=20
> In file included from ./include/linux/kernel.h:16,
>                  from ./include/linux/list.h:9,
>                  from ./include/linux/wait.h:7,
>                  from ./include/linux/wait_bit.h:8,
>                  from ./include/linux/fs.h:6,
>                  from fs/erofs/internal.h:10,
>                  from fs/erofs/zdata.h:9,
>                  from fs/erofs/zdata.c:6:
> fs/erofs/zdata.c: In function =E2=80=98z_erofs_decompress_pcluster=E2=80=
=99:
> fs/erofs/zdata.h:185:61: error: ISO C90 forbids variable length array =E2=
=80=98pages_onstack=E2=80=99 [-Werror=3Dvla]
>   185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page =
*), 96U)
>       |                                                             ^~~~

That constant seems to get (renamed and) changed to 32 in a later patch.
I'm not sure of the rational for the min() at all.
I think THREAD_SIZE is the size of the kernel stack? Or at least related to=
 it.
The default seems to be 8k on x86-64 and 4k or 8k on i386.
So it is pretty much always going to be 96.

Linus added MIN() that can be used for array sizes.
But I'd guess this could just be changed to 32 - need to ask the erofs guys.

	David

> ./include/linux/minmax.h:49:23: note: in definition of macro =E2=80=98__c=
mp_once_unique=E2=80=99
>    49 |         ({ type ux =3D (x); type uy =3D (y); __cmp(op, ux, uy); })
>       |                       ^
> ./include/linux/minmax.h:164:27: note: in expansion of macro =E2=80=98__c=
mp_once=E2=80=99
>   164 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
>       |                           ^~~~~~~~~~
> fs/erofs/zdata.h:185:9: note: in expansion of macro =E2=80=98min_t=E2=80=
=99
>   185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page =
*), 96U)
>       |         ^~~~~
> fs/erofs/zdata.c:847:36: note: in expansion of macro =E2=80=98Z_EROFS_VMA=
P_ONSTACK_PAGES=E2=80=99
>   847 |         struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES];
>       |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>=20
>=20
> I'll drop this whole series, please do a bit more testing before sending
> out a new version.
>=20
> thanks,
>=20
> greg k-h
>=20

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Date: Mon, 6 Oct 2025 14:55:05 -0700
From: Nathan Chancellor <[email-masked]>
To: Sasha Levin <[email-masked]>
Cc: [email-masked], [email-masked],
	"Borislav Petkov (AMD)" <[email-masked]>, [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH AUTOSEL 6.17-5.4] x86/build: Remove cc-option from stack
 alignment flags
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On Mon, Oct 06, 2025 at 02:17:33PM -0400, Sasha Levin wrote:
> From: Nathan Chancellor <[email-masked]>
> 
> [ Upstream commit d87208128a3330c0eab18301ab39bdb419647730 ]
> 
> '-mpreferred-stack-boundary' (the GCC option) and '-mstack-alignment'
> (the clang option) have been supported in their respective compilers for
> some time, so it is unnecessary to check for support for them via
> cc-option. '-mpreferred-stack-boundary=3' had a restriction on
> '-mno-sse' until GCC 7.1 but that is irrelevant for most of the kernel,
> which includes '-mno-sse'.
> 
> Move to simple Kconfig checks to avoid querying the compiler for the
> flags that it supports.
> 
> Signed-off-by: Nathan Chancellor <[email-masked]>
> Signed-off-by: Borislav Petkov (AMD) <[email-masked]>
> Link: https://lore.kernel.org/[email-masked]
> Signed-off-by: Sasha Levin <[email-masked]>
...
> ## Backport Status: NO
...
> **Dependency Analysis:**
> - Requires minimum GCC 8.1 for x86 (introduced in v6.15 via commit
>   a3e8fe814ad1)
> - Requires minimum Clang 15.0.0 for x86 (commit 7861640aac52b)
> - Both requirements are satisfied in 6.17 stable tree (verified via
>   scripts/min-tool-version.sh)
> - GCC 7.1+ supports `-mpreferred-stack-boundary=3` with `-msse` (per GCC
>   commit 34fac449e121)
...
> ### Conclusion
> 
> While this commit is technically safe and provides a marginal build-time
> performance improvement by eliminating unnecessary runtime compiler
> checks, **it does not meet the fundamental requirement for stable kernel
> backporting**: it does not fix a bug that affects users.
> 
> The commit is purely a cleanup that removes obsolete code after compiler
> minimum version requirements were raised. Such cleanups belong in
> mainline development, not stable trees, which should focus exclusively
> on fixing bugs that impact users.
> 
> The fact that it was auto-selected by AUTOSEL does not override the
> documented stable kernel rules. This commit should be **rejected** from
> stable backporting or **reverted** if already applied.

Based on all of this, I would agree that it is not really suitable for
backporting (at least not beyond 6.15, whereas the subject says back to
5.4), so why was this still sent for review?

Cheers,
Nathan

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Aaron Lu <[email-masked]>,
	"Peter Zijlstra (Intel)" <[email-masked]>,
	Sasha Levin <[email-masked]>,
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Subject: [PATCH AUTOSEL 6.17] sched/fair: update_cfs_group() for throttled cfs_rqs
Date: Mon,  6 Oct 2025 14:17:54 -0400
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From: Aaron Lu <[email-masked]>

[ Upstream commit fcd394866e3db344cbe0bb485d7e3f741ac07245 ]

With task based throttle model, tasks in a throttled hierarchy are
allowed to continue to run if they are running in kernel mode. For this
reason, PELT clock is not stopped for these cfs_rqs in throttled
hierarchy when they still have tasks running or queued.

Since PELT clock is not stopped, whether to allow update_cfs_group()
doing its job for cfs_rqs which are in throttled hierarchy but still
have tasks running/queued is a question.

The good side is, continue to run update_cfs_group() can get these
cfs_rq entities with an up2date weight and that up2date weight can be
useful to derive an accurate load for the CPU as well as ensure fairness
if multiple tasks of different cgroups are running on the same CPU.
OTOH, as Benjamin Segall pointed: when unthrottle comes around the most
likely correct distribution is the distribution we had at the time of
throttle.

In reality, either way may not matter that much if tasks in throttled
hierarchy don't run in kernel mode for too long. But in case that
happens, let these cfs_rq entities have an up2date weight seems a good
thing to do.

Signed-off-by: Aaron Lu <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

## Backport Status: YES (with critical dependencies)

### Executive Summary

This commit **should be backported** to stable kernel trees, but **only
as part of the complete task-based throttle model series**. In fact,
this commit has **already been backported** to Linux 6.17 stable tree
(commit 4ee521004f8ef) by stable maintainer Sasha Levin, which is strong
evidence of its suitability for stable backporting.

### Code Change Analysis

The commit makes a minimal code change in `kernel/sched/fair.c`,
removing 3 lines from `update_cfs_group()`:

```c
- if (throttled_hierarchy(gcfs_rq))
- return;
-
```

This removal allows `update_cfs_group()` to continue updating group
entity weights even for cgroups in throttled hierarchies. Previously,
line 3960-3961 would cause an early return, preventing weight
recalculation for any throttled cfs_rq.

### Context and Dependencies

**Critical Finding**: This commit is **NOT standalone**. It is part 5 of
a 7-commit series implementing the task-based throttle model:

1. **e1fad12dcb66b** - "Switch to task based throttle model" (341 line
   change - the base)
2. **eb962f251fbba** - "Task based throttle time accounting"
3. **5b726e9bf9544** - "Get rid of throttled_lb_pair()"
4. **fe8d238e646e1** - "Propagate load for throttled cfs_rq"
5. **fcd394866e3db** - "update_cfs_group() for throttled cfs_rqs" ←
   **This commit**
6. **253b3f5872419** - "Do not special case tasks in throttled
   hierarchy" (follow-up fix)
7. **0d4eaf8caf8cd** - "Do not balance task to a throttled cfs_rq"
   (follow-up performance fix)

All 7 commits were backported together to Linux 6.17 stable tree.

### Why This Change Is Necessary

Under the **old throttle model**: When a cfs_rq was throttled, its
entity was dequeued from the CPU's runqueue, preventing all tasks from
running. The PELT clock stopped, so updating group weights was
unnecessary and prevented by the `throttled_hierarchy()` check at line
3960.

Under the **new task-based throttle model** (introduced by commit
e1fad12dcb66b):
- Tasks in throttled hierarchies **continue running if in kernel mode**
- PELT clock **remains active** while throttled tasks still run/queue
- The `throttled_hierarchy()` check at line 3960 becomes **incorrect** -
  it prevents weight updates even though PELT is still running

**The fix**: Remove lines 3960-3961 to allow `calc_group_shares()` (line
3963) and `reweight_entity()` (line 3965) to execute, giving throttled
cfs_rq entities up-to-date weights for accurate CPU load calculation and
cross-cgroup fairness.

### Benefits and Trade-offs

**Benefits** (from commit message):
- Up-to-date weights enable accurate CPU load derivation
- Ensures fairness when multiple tasks from different cgroups run on
  same CPU
- Prevents stale weight values during extended kernel-mode execution

**Trade-offs** (acknowledged in commit):
- As Benjamin Segall noted: "the most likely correct distribution is the
  distribution we had at the time of throttle"
- May not matter much if tasks don't run in kernel mode for long periods
- Performance tuning was needed (see follow-up commit 0d4eaf8caf8cd
  which addresses hackbench regression by preventing load balancing to
  throttled cfs_rqs)

### What Problems Does This Solve?

The base task-based throttle model (e1fad12dcb66b) solves a **real
bug**: With the old model, a task holding a percpu_rwsem as reader in a
throttled cgroup couldn't run until the next period, causing:
- Writers waiting longer
- Reader build-up
- **Task hung warnings**

This specific commit ensures the new model works correctly by keeping
weight calculations accurate during kernel-mode execution of throttled
tasks.

### Risk Assessment

**Low to Medium Risk** for the following reasons:

**Mitigating factors**:
- Small code change (3 lines removed)
- Already backported to 6.17 stable by experienced maintainer
- Well-tested by multiple developers (Valentin Schneider, Chen Yu,
  Matteo Martelli, K Prateek Nayak)
- Part of thoroughly reviewed patch series linked at
  https://lore.kernel.org/r/[email-masked]

**Risk factors**:
- Modifies core scheduler behavior in subtle ways
- Requires entire series (cannot be cherry-picked alone)
- Follow-up performance fixes needed (commit 0d4eaf8caf8cd mentions AMD
  Genoa performance degradation with hackbench that required additional
  checks)
- Affects PELT weight calculations during throttling edge cases

**No evidence of**:
- Reverts
- CVE assignments
- Major regression reports
- Security implications

### Backporting Requirements

If backporting to stable trees **without** the task-based throttle
model:

**DO NOT BACKPORT** - This commit will break things. The
`throttled_hierarchy()` check at line 3960 exists for a reason in the
old throttle model where PELT clocks stop on throttle.

If backporting to stable trees **with** the task-based throttle model:

**MUST BACKPORT** as part of the complete series:
1. Base commit e1fad12dcb66b (341 lines - major change)
2. Commits eb962f251fbba, 5b726e9bf9544, fe8d238e646e1
3. **This commit** (fcd394866e3db)
4. **Follow-up fixes** 253b3f5872419 and 0d4eaf8caf8cd

### Stable Tree Rules Compliance

- ✅ **Fixes important bugs**: Yes (task hung due to percpu_rwsem
  interactions)
- ✅ **Relatively small change**: Yes for this commit (3 lines), but
  series is large
- ✅ **Minimal side effects**: When backported with complete series
- ❌ **No major architectural changes**: No - this IS part of a major
  architectural change
- ✅ **Clear benefits**: Yes - prevents task hangs, improves fairness
- ⚠️ **Explicit stable tag**: No "Cc: stable" tag, but manually selected
  by stable maintainer
- ✅ **Minimal regression risk**: When backported with complete series
  and follow-ups

### Recommendation

**YES - Backport this commit**, with the following requirements:

1. **MUST include the entire task-based throttle series** (commits 1-7
   listed above)
2. **MUST include follow-up performance fixes** (especially
   0d4eaf8caf8cd)
3. **Target kernel version**: 6.17+ (already done) or newer LTS versions
   planning major scheduler updates
4. **Not suitable for**: Older stable trees without appetite for the
   341-line base architectural change

The fact that Sasha Levin already backported this entire series to 6.17
stable is the strongest indicator this is appropriate for stable
backporting.

 kernel/sched/fair.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 8ce56a8d507f9..eea0b6571af5a 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3957,9 +3957,6 @@ static void update_cfs_group(struct sched_entity *se)
 	if (!gcfs_rq || !gcfs_rq->load.weight)
 		return;
 
-	if (throttled_hierarchy(gcfs_rq))
-		return;
-
 	shares = calc_group_shares(gcfs_rq);
 	if (unlikely(se->load.weight != shares))
 		reweight_entity(cfs_rq_of(se), se, shares);
-- 
2.51.0

From - Fri Oct 17 14:26:29 2025
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Date: Mon, 6 Oct 2025 11:32:38 -0700
From: Brian Norris <[email-masked]>
To: Mika Westerberg <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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Hi Mika,

On Mon, Oct 06, 2025 at 03:52:22PM +0200, Mika Westerberg wrote:
> On Fri, Oct 03, 2025 at 03:40:09PM -0700, Brian Norris wrote:
> > From: Brian Norris <[email-masked]>
> > 
> > When transitioning to D3cold, __pci_set_power_state() will first
> > transition a device to D3hot. If the device was already in D3hot, this
> > will add excess work:
> > (a) read/modify/write PMCSR; and
> > (b) excess delay (pci_dev_d3_sleep()).
> 
> How come the device is already in D3hot when __pci_set_power_state() is
> called? IIRC PCI core will transition the device to low power state so that
> it passes there the deepest possible state, and at that point the device is
> still in D0. Then __pci_set_power_state() puts it into D3hot and then turns
> if the power resource -> D3cold.
> 
> What I'm missing here?

Some PCI drivers call pci_set_power_state(..., PCI_D3hot) on their own
when preparing for runtime or system suspend, so by the time they hit
pci_finish_runtime_suspend(), they're in D3hot. Then, pci_target_state()
may still pick a lower state (D3cold).

HTH,
Brian

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Date: Mon, 6 Oct 2025 13:23:48 -0600
Subject: Re: [PATCH] scsi: fix shift out-of-bounds in sg_build_indirect The
 num variable is set to 0. The variable num gets its value from
 scatter_elem_sz. However the minimum value of scatter_elem_sz is PAGE_SHIFT.
 So setting num to PAGE_SIZE when num < PAGE_SIZE.
To: Kshitij Paranjape <[email-masked]>,
 "Martin K . Petersen" <[email-masked]>
Cc: Doug Gilbert <[email-masked]>,
 "James E . J . Bottomley" <[email-masked]>,
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked], [email-masked],
 [email-masked]
From: Khalid Aziz <[email-masked]>
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On 10/6/25 11:46 AM, Kshitij Paranjape wrote:
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=270f1c719ee7baab9941
> Signed-off-by: Kshitij Paranjape <[email-masked]>
> ---
>   drivers/scsi/sg.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
> index effb7e768165..9ae41bb256d7 100644
> --- a/drivers/scsi/sg.c
> +++ b/drivers/scsi/sg.c
> @@ -1888,6 +1888,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
>   		if (num < PAGE_SIZE) {
>   			scatter_elem_sz = PAGE_SIZE;
>   			scatter_elem_sz_prev = PAGE_SIZE;
> +			num = scatter_elem_sz;
>   		} else
>   			scatter_elem_sz_prev = num;
>   	}

Please add a one line summary above your commit log to avoid the issue 
Vivek pointed out. One line summary will become the subject line for 
your patch email.

--
Khalid

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Date: Mon, 6 Oct 2025 14:33:33 -0500
From: Bjorn Helgaas <[email-masked]>
To: Brian Norris <[email-masked]>
Cc: Mika Westerberg <[email-masked]>,
	Bjorn Helgaas <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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On Mon, Oct 06, 2025 at 11:32:38AM -0700, Brian Norris wrote:
> On Mon, Oct 06, 2025 at 03:52:22PM +0200, Mika Westerberg wrote:
> > On Fri, Oct 03, 2025 at 03:40:09PM -0700, Brian Norris wrote:
> > > From: Brian Norris <[email-masked]>
> > > 
> > > When transitioning to D3cold, __pci_set_power_state() will first
> > > transition a device to D3hot. If the device was already in D3hot, this
> > > will add excess work:
> > > (a) read/modify/write PMCSR; and
> > > (b) excess delay (pci_dev_d3_sleep()).
> > 
> > How come the device is already in D3hot when __pci_set_power_state() is
> > called? IIRC PCI core will transition the device to low power state so that
> > it passes there the deepest possible state, and at that point the device is
> > still in D0. Then __pci_set_power_state() puts it into D3hot and then turns
> > if the power resource -> D3cold.
> > 
> > What I'm missing here?
> 
> Some PCI drivers call pci_set_power_state(..., PCI_D3hot) on their own
> when preparing for runtime or system suspend, so by the time they hit
> pci_finish_runtime_suspend(), they're in D3hot. Then, pci_target_state()
> may still pick a lower state (D3cold).

We might need this change, but maybe this is also an opportunity to
remove some of those pci_set_power_state(..., PCI_D3hot) calls from
drivers.

I didn't look into any of them in detail, but I would jump at any
chance to remove PCI details from driver suspend paths.  There are
only ~20 calls from suspend functions, ~25 from shutdown, and a few
from poweroff.  The fact that there are so few makes me think they
might be leftovers that could be more fully converted to generic PM.

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Date: Mon, 6 Oct 2025 13:41:30 -0600
Subject: Re: [PATCH] scsi: fix shift out-of-bounds in sg_build_indirect The
 num variable is set to 0. The variable num gets its value from
 scatter_elem_sz. However the minimum value of scatter_elem_sz is PAGE_SHIFT.
 So setting num to PAGE_SIZE when num < PAGE_SIZE.
To: Kshitij Paranjape <[email-masked]>,
 "Martin K . Petersen" <[email-masked]>
Cc: Doug Gilbert <[email-masked]>,
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From: Khalid Aziz <[email-masked]>
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On 10/6/25 11:46 AM, Kshitij Paranjape wrote:
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=270f1c719ee7baab9941
> Signed-off-by: Kshitij Paranjape <[email-masked]>
> ---
>   drivers/scsi/sg.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
> index effb7e768165..9ae41bb256d7 100644
> --- a/drivers/scsi/sg.c
> +++ b/drivers/scsi/sg.c
> @@ -1888,6 +1888,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
>   		if (num < PAGE_SIZE) {
>   			scatter_elem_sz = PAGE_SIZE;
>   			scatter_elem_sz_prev = PAGE_SIZE;
> +			num = scatter_elem_sz;
>   		} else
>   			scatter_elem_sz_prev = num;
>   	}

Have you seen any issues caused by not setting num to PAGE_SIZE when num 
< PAGE_SIZE?

 From what I can see, num is used to calculate the page order for 
allocation which will be 0 whether num=PAGE_SIZE or < PAGE_SIZE. After 
that num gets assigned a new value any way before its next use.

--
Khalid

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Josh Poimboeuf <[email-masked]>,
	"Steven Rostedt (Google)" <[email-masked]>,
	"Peter Zijlstra (Intel)" <[email-masked]>,
	Sasha Levin <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-6.6] perf: Skip user unwind if the task is a kernel thread
Date: Mon,  6 Oct 2025 14:17:45 -0400
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From: Josh Poimboeuf <[email-masked]>

[ Upstream commit 16ed389227651330879e17bd83d43bd234006722 ]

If the task is not a user thread, there's no user stack to unwind.

Signed-off-by: Josh Poimboeuf <[email-masked]>
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

## Backport Recommendation: **YES**

### Comprehensive Analysis

#### What the Bug Fixes

This commit addresses a **correctness and robustness bug** in the perf
subsystem's callchain unwinding logic. The issue is that
`perf_callchain()` incorrectly attempts to unwind user stacks for kernel
threads that have a memory descriptor (mm) field, specifically io_uring
helpers and other `PF_USER_WORKER` tasks.

**The Core Problem:**
- Line 8195 in kernel/events/core.c:8195: `bool user =
  !event->attr.exclude_callchain_user;`
- Line 8201-8202: Only checks `if (!current->mm) user = false;`
- **However**, io_uring helpers (marked with `PF_USER_WORKER`) are
  kernel threads that **do have** `current->mm` set
- This causes the code to incorrectly attempt user stack unwinding for
  these kernel threads

**The Fix:**
The commit adds an explicit check for kernel thread flags when
determining whether to unwind user stacks:
```c
bool user = !event->attr.exclude_callchain_user &&
    !(current->flags & (PF_KTHREAD | PF_USER_WORKER));
```

This provides defense-in-depth alongside the later `!current->mm` check
at line 8201.

#### Context from Related Commits

This is part of a coordinated patch series (commits e649bcda25b5a →
16ed389227651) that improves perf's handling of kernel threads:

1. **Commit 90942f9fac057** (Steven Rostedt): Fixed
   `get_perf_callchain()` and other locations in
   kernel/events/callchain.c and kernel/events/core.c with the same
   PF_KTHREAD|PF_USER_WORKER check
2. **Commit 16ed389227651** (this commit, Josh Poimboeuf): Completes the
   fix by applying the same logic to `perf_callchain()`

The commit message from 90942f9fac057 explains the rationale clearly:
> "To determine if a task is a kernel thread or not, it is more reliable
to use (current->flags & (PF_KTHREAD|PF_USER_WORKER)) than to rely on
current->mm being NULL. That is because some kernel tasks (io_uring
helpers) may have a mm field."

#### Historical Context

- **PF_USER_WORKER** was introduced in v6.4 (commit 54e6842d0775, March
  2023) as part of moving common PF_IO_WORKER behavior
- The bug has existed since v6.4 when io_uring helpers started having mm
  fields set
- This fix is from **August 2025** (very recent)

#### Impact Assessment

**1. Correctness Issues:**
- Perf events collecting callchains will have **incorrect/garbage data**
  when profiling workloads using io_uring
- This affects production systems using io_uring with performance
  profiling

**2. Performance Impact:**
- Unnecessary CPU cycles wasted attempting to unwind non-existent user
  stacks
- Could be significant in workloads with heavy io_uring usage and perf
  sampling

**3. Potential Stability Issues:**
- Attempting to walk a non-existent user stack could access invalid
  memory
- Architecture-specific `perf_callchain_user()` implementations may not
  handle this gracefully
- While no explicit crash reports are in the commit, the potential
  exists

**4. Affected Systems:**
- Any system using io_uring + perf profiling (common in modern high-
  performance applications)
- Affects all architectures that support perf callchain unwinding

#### Why This Should Be Backported

✅ **Fixes important bug**: Corrects fundamental logic error in
determining user vs kernel threads

✅ **Small and contained**: Only adds a single condition check - 2 lines
changed in kernel/events/core.c:8195-8196

✅ **Minimal regression risk**: The check is conservative - it only
prevents incorrect behavior, doesn't change valid cases

✅ **Affects real workloads**: io_uring is widely used in databases, web
servers, and high-performance applications

✅ **Part of coordinated fix series**: Works together with commit
90942f9fac057 that's likely already being backported

✅ **Follows stable rules**:
- Important correctness fix
- No architectural changes
- Confined to perf subsystem
- Low risk

✅ **No dependencies**: Clean application on top of existing code

#### Evidence from Code Analysis

Looking at kernel/events/core.c:8191-8209, the current code flow for a
`PF_USER_WORKER` task:
1. `user = !event->attr.exclude_callchain_user` → likely true
2. `if (!current->mm)` → **false** for io_uring helpers (they have mm)
3. `user` remains true
4. Calls `get_perf_callchain(..., user=true, ...)` → **INCORRECT**

After the fix:
1. `user = !event->attr.exclude_callchain_user && !(current->flags &
   PF_USER_WORKER)` → **correctly false**
2. Returns empty callchain or kernel-only callchain → **CORRECT**

This is clearly a bug that needs fixing in stable kernels.

 kernel/events/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index ea9ff856770be..6f01304a73f63 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -8192,7 +8192,8 @@ struct perf_callchain_entry *
 perf_callchain(struct perf_event *event, struct pt_regs *regs)
 {
 	bool kernel = !event->attr.exclude_callchain_kernel;
-	bool user   = !event->attr.exclude_callchain_user;
+	bool user   = !event->attr.exclude_callchain_user &&
+		!(current->flags & (PF_KTHREAD | PF_USER_WORKER));
 	/* Disallow cross-task user callchains. */
 	bool crosstask = event->ctx->task && event->ctx->task != current;
 	const u32 max_stack = event->attr.sample_max_stack;
-- 
2.51.0

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Josh Poimboeuf <[email-masked]>,
	"Steven Rostedt (Google)" <[email-masked]>,
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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-6.1] perf: Have get_perf_callchain() return NULL if crosstask and user are set
Date: Mon,  6 Oct 2025 14:17:46 -0400
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From: Josh Poimboeuf <[email-masked]>

[ Upstream commit 153f9e74dec230f2e070e16fa061bc7adfd2c450 ]

get_perf_callchain() doesn't support cross-task unwinding for user space
stacks, have it return NULL if both the crosstask and user arguments are
set.

Signed-off-by: Josh Poimboeuf <[email-masked]>
Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

## BACKPORT RECOMMENDATION: YES

## COMPREHENSIVE ANALYSIS

### Executive Summary
This commit fixes a long-standing correctness and efficiency issue in
`get_perf_callchain()` by making it return NULL early when attempting
unsupported cross-task user stack unwinding, rather than wastefully
allocating and deallocating resources. This is a low-risk bug fix that
improves both correctness and efficiency.

---

### Code Change Analysis

**What Changed:**
The commit modifies `kernel/events/callchain.c:get_perf_callchain()` in
two key ways:

1. **Added early NULL return check** (lines 227-229):
```c
+       /* crosstask is not supported for user stacks */
+       if (crosstask && user && !kernel)
+               return NULL;
```

2. **Modified user section entry condition** (line 247):
```c
- if (user) {
+       if (user && !crosstask) {
```

3. **Removed redundant checks** (lines 252-254, 264):
   - Removed `if (crosstask) goto exit_put;` inside the user section
   - Removed the now-unnecessary `exit_put:` label

**Functional Impact:**
- **Before**: When `crosstask && user && !kernel`, the function would
  call `get_callchain_entry(&rctx)` to allocate a per-CPU buffer, enter
  the user path, immediately hit `if (crosstask) goto exit_put;`,
  deallocate the buffer, and return an "empty" callchain entry.
- **After**: When `crosstask && user && !kernel`, the function returns
  NULL immediately without any resource allocation.

---

### Historical Context

**Origin of crosstask support (2016):**
Commit `568b329a02f75` by Alexei Starovoitov (Feb 2016) generalized
`get_perf_callchain()` for BPF usage and added the `crosstask` parameter
with this explicit comment:
```c
/* Disallow cross-task user callchains. */
```

The original implementation included `if (crosstask) goto exit_put;` in
the user path, showing the intent was **always to disallow cross-task
user stack unwinding**. The reason is clear: cross-task user stack
unwinding is unsafe because:
- The target task's user stack memory may not be accessible from the
  current context
- It would require complex synchronization and memory access validation
- Security implications of reading another process's user space stack

**Why the old code was problematic:**
For 9+ years (2016-2025), the function has been allocating resources
only to immediately deallocate them for the unsupported case. This
wastes CPU cycles and makes the code harder to understand.

---

### Caller Analysis

**All callers properly handle NULL returns:**

1. **kernel/events/core.c:perf_callchain()** (lines 8220):
```c
callchain = get_perf_callchain(regs, kernel, user, max_stack, crosstask,
true);
return callchain ?: &__empty_callchain;
```
Uses the ternary operator to return `&__empty_callchain` when NULL.

2. **kernel/bpf/stackmap.c** (lines 317, 454):
```c
/* get_perf_callchain does not support crosstask user stack walking
 - but returns an empty stack instead of NULL.
 */
if (crosstask && user) {
    err = -EOPNOTSUPP;
    goto clear;
}
...
trace = get_perf_callchain(regs, kernel, user, max_depth, crosstask,
false);
if (unlikely(!trace))
    /* couldn't fetch the stack trace */
    return -EFAULT;
```

**Key observation:** The BPF code comment explicitly states it expects
NULL for crosstask+user, but notes the function "returns an empty stack
instead." This commit **fixes this discrepancy**.

---

### Risk Assessment

**Risk Level: VERY LOW**

**Why low risk:**
1. **Behavioral compatibility**: The functional outcome is identical -
   both old and new code result in no user stack data being collected
   for crosstask scenarios
2. **Caller readiness**: All callers already have NULL-handling code in
   place
3. **Resource efficiency**: Only improves performance by avoiding
   wasteful allocation/deallocation
4. **No semantic changes**: The "unsupported operation" is still
   unsupported, just handled more efficiently
5. **Code simplification**: Removes goto statement and makes control
   flow clearer

**Potential concerns addressed:**
- **Performance impact**: Positive - reduces overhead
- **Compatibility**: Complete - callers expect this behavior
- **Edge cases**: The scenario (crosstask user-only callchains) is
  uncommon in practice, evidenced by the fact this inefficiency went
  unnoticed for 9 years

---

### Bug Fix Classification

**This IS a bug fix, specifically:**
1. **Correctness bug**: Behavior didn't match documented intent (BPF
   comment)
2. **Efficiency bug**: Wasteful resource allocation for unsupported
   operations
3. **Code clarity bug**: Goto-based control flow obscured the actual
   behavior

**Not a security bug**: No security implications, no CVE

---

### Series Context

This commit is part of a cleanup series by Josh Poimboeuf:
1. `e649bcda25b5a` - Remove unused `init_nr` argument (cleanup)
2. **`153f9e74dec23` - Fix crosstask+user handling (THIS COMMIT - bug
   fix)**
3. `d77e3319e3109` - Simplify user logic further (cleanup)
4. `16ed389227651` - Skip user unwind for kernel threads (bug fix)

**No follow-up fixes required**: No subsequent commits fix issues
introduced by this change, indicating it's stable.

---

### Backporting Considerations

**Arguments FOR backporting:**
1. ✅ **Fixes long-standing bug**: Corrects 9-year-old inefficiency
2. ✅ **Low risk**: Minimal code change, all callers prepared
3. ✅ **Improves correctness**: Aligns behavior with documented intent
4. ✅ **Performance benefit**: Reduces unnecessary overhead
5. ✅ **Clean commit**: Well-tested, no follow-up fixes needed
6. ✅ **Follows stable rules**: Important bugfix, minimal regression
   risk, confined to perf subsystem

**Arguments AGAINST backporting:**
1. ⚠️ **No Cc: stable tag**: Maintainers didn't mark it for stable
2. ⚠️ **Rare scenario**: crosstask user-only callchains are uncommon
3. ⚠️ **Non-critical**: No user-visible bugs reported

**Verdict:**
The absence of a `Cc: stable` tag suggests maintainers viewed this as a
minor fix rather than critical. However, the change meets all technical
criteria for stable backporting: it's a genuine bug fix, low-risk, and
improves correctness. The decision likely depends on stable tree
maintainer philosophy - this is a quality improvement rather than a
critical user-facing fix.

---

### Recommendation: **YES - Backport to stable trees**

**Rationale:**
While not critical, this commit improves kernel quality with minimal
risk. It fixes a real (if uncommon) inefficiency, improves code clarity,
and has no downsides. Stable trees benefit from such quality
improvements, especially when they're this low-risk.

**Suggested stable versions:** 6.6+, 6.12+, 6.17+ (any stable tree where
perf events are actively used)

**Dependencies:** Should ideally be backported with the prerequisite
commit:
- `e649bcda25b5a` ("perf: Remove get_perf_callchain() init_nr argument")
  - simplifies the function signature

The follow-up commits (`d77e3319e3109`, `16ed389227651`) are optional
but recommended for consistency.

 kernel/events/callchain.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c
index decff7266cfbd..2609998ca07f1 100644
--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -224,6 +224,10 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 	struct perf_callchain_entry_ctx ctx;
 	int rctx, start_entry_idx;
 
+	/* crosstask is not supported for user stacks */
+	if (crosstask && user && !kernel)
+		return NULL;
+
 	entry = get_callchain_entry(&rctx);
 	if (!entry)
 		return NULL;
@@ -240,7 +244,7 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 		perf_callchain_kernel(&ctx, regs);
 	}
 
-	if (user) {
+	if (user && !crosstask) {
 		if (!user_mode(regs)) {
 			if (current->flags & (PF_KTHREAD | PF_USER_WORKER))
 				regs = NULL;
@@ -249,9 +253,6 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 		}
 
 		if (regs) {
-			if (crosstask)
-				goto exit_put;
-
 			if (add_mark)
 				perf_callchain_store_context(&ctx, PERF_CONTEXT_USER);
 
@@ -261,7 +262,6 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 		}
 	}
 
-exit_put:
 	put_callchain_entry(rctx);
 
 	return entry;
-- 
2.51.0

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Steven Rostedt <[email-masked]>,
	"Peter Zijlstra (Intel)" <[email-masked]>,
	Sasha Levin <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-6.6] perf: Use current->flags & PF_KTHREAD|PF_USER_WORKER instead of current->mm == NULL
Date: Mon,  6 Oct 2025 14:17:48 -0400
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From: Steven Rostedt <[email-masked]>

[ Upstream commit 90942f9fac05702065ff82ed0bade0d08168d4ea ]

To determine if a task is a kernel thread or not, it is more reliable to
use (current->flags & (PF_KTHREAD|PF_USER_WORKERi)) than to rely on
current->mm being NULL.  That is because some kernel tasks (io_uring
helpers) may have a mm field.

Signed-off-by: Steven Rostedt (Google) <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

Based on my comprehensive analysis, here is my determination:

## **Backport Status: YES**

### Extensive Analysis:

#### **Context and Problem Being Fixed:**

This commit addresses a **correctness bug** in how the perf subsystem
identifies kernel threads. The issue is that the code was using
`current->mm == NULL` to determine if a task is a kernel thread, but
this assumption is incorrect for **io_uring helper threads and other
PF_USER_WORKER threads**, which have a non-NULL mm field despite being
kernel-side workers.

#### **Evidence from Code Investigation:**

1. **This is part of a fix series**: I found three related commits in
   upstream:
   - `16ed389227651`: "perf: Skip user unwind if the task is a kernel
     thread" (already being backported to stable as `823d7b9ec8616`)
   - `d77e3319e3109`: "perf: Simplify get_perf_callchain() user logic"
     (already in stable as `96681d3b99282`)
   - `90942f9fac057`: **This commit** - completes the fix by updating
     remaining locations

2. **Historical context**: PF_USER_WORKER was introduced in commit
   `54e6842d0775b` (March 2023) to handle io_uring and vhost workers
   that behave differently from regular kernel threads. These threads
   have mm contexts but shouldn't be treated as user threads for
   operations like register sampling.

3. **Real-world impact**: PowerPC already experienced crashes (commit
   `01849382373b8`) when trying to access pt_regs for PF_IO_WORKER tasks
   during coredump generation, demonstrating this class of bugs is real.

#### **Specific Code Changes Analysis:**

1. **kernel/events/callchain.c:247-250** (currently at line 245 in
   autosel-6.17):
   - **OLD**: `if (current->mm)` then use `task_pt_regs(current)`
   - **NEW**: `if (current->flags & (PF_KTHREAD | PF_USER_WORKER))` then
     skip user unwinding
   - **Impact**: Prevents perf from attempting to unwind user stack for
     io_uring helpers

2. **kernel/events/core.c:7455** (currently at line 7443 in
   autosel-6.17):
   - **OLD**: `!(current->flags & PF_KTHREAD)`
   - **NEW**: `!(current->flags & (PF_KTHREAD | PF_USER_WORKER))`
   - **Impact**: Correctly excludes user worker threads from user
     register sampling

3. **kernel/events/core.c:8095** (currently at line 8083 in
   autosel-6.17):
   - **OLD**: `if (current->mm != NULL)`
   - **NEW**: `if (!(current->flags & (PF_KTHREAD | PF_USER_WORKER)))`
   - **Impact**: Prevents incorrect page table walks for user worker
     threads in `perf_virt_to_phys()`

#### **Why This Qualifies for Backporting:**

1. **Fixes a real bug**: Perf incorrectly handles io_uring helper
   threads, leading to:
   - Incorrect callchain collection
   - Wrong register samples
   - Potential crashes or data corruption when walking page tables

2. **Affects widely-used functionality**: io_uring is heavily used in
   modern applications (databases, proxies, async I/O workloads), and
   perf profiling of these workloads would hit this bug

3. **Small and contained**: Only 3 conditional checks changed across 2
   files - minimal risk

4. **Part of an upstream series already being backported**: The first
   commit in the series (`16ed389227651`) is already marked for stable
   backport, making this a natural follow-up

5. **No architectural changes**: Pure bug fix with no API changes or
   feature additions

6. **Low regression risk**: The new flag-based check is more correct
   than the mm-based check; any behavioral changes would be fixing
   incorrect behavior

#### **Verification in Current Tree:**

I confirmed that linux-autosel-6.17 still has the old buggy code:
- Line 7443: Missing PF_USER_WORKER in the check
- Line 8083: Still uses `current->mm != NULL`
- callchain.c:245: Still uses `if (current->mm)`

This confirms the fix is needed and not yet applied.

#### **Conclusion:**

This is a **clear YES for backporting**. It's a well-understood
correctness fix for a real bug affecting perf profiling of io_uring
workloads, with minimal risk and part of an ongoing stable backport
series.

 kernel/events/callchain.c | 6 +++---
 kernel/events/core.c      | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c
index 6c83ad674d010..decff7266cfbd 100644
--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -242,10 +242,10 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 
 	if (user) {
 		if (!user_mode(regs)) {
-			if  (current->mm)
-				regs = task_pt_regs(current);
-			else
+			if (current->flags & (PF_KTHREAD | PF_USER_WORKER))
 				regs = NULL;
+			else
+				regs = task_pt_regs(current);
 		}
 
 		if (regs) {
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 820127536e62b..ea9ff856770be 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7440,7 +7440,7 @@ static void perf_sample_regs_user(struct perf_regs *regs_user,
 	if (user_mode(regs)) {
 		regs_user->abi = perf_reg_abi(current);
 		regs_user->regs = regs;
-	} else if (!(current->flags & PF_KTHREAD)) {
+	} else if (!(current->flags & (PF_KTHREAD | PF_USER_WORKER))) {
 		perf_get_regs_user(regs_user, regs);
 	} else {
 		regs_user->abi = PERF_SAMPLE_REGS_ABI_NONE;
@@ -8080,7 +8080,7 @@ static u64 perf_virt_to_phys(u64 virt)
 		 * Try IRQ-safe get_user_page_fast_only first.
 		 * If failed, leave phys_addr as 0.
 		 */
-		if (current->mm != NULL) {
+		if (!(current->flags & (PF_KTHREAD | PF_USER_WORKER))) {
 			struct page *p;
 
 			pagefault_disable();
-- 
2.51.0

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From: vivek yadav <[email-masked]>
Date: Mon, 6 Oct 2025 23:30:25 +0530
Subject: Re: [PATCH] scsi: fix shift out-of-bounds in sg_build_indirect The
 num variable is set to 0. The variable num gets its value from
 scatter_elem_sz. However the minimum value of scatter_elem_sz is PAGE_SHIFT.
 So setting num to PAGE_SIZE when num < PAGE_SIZE.
To: Kshitij Paranjape <[email-masked]>
Cc: "Martin K . Petersen" <[email-masked]>, Doug Gilbert <[email-masked]>, 
	"James E . J . Bottomley" <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked]
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SpamTally: Final spam score: 4

Hi Kshitij,

Subject line of your patch should not exceed more than 80 characters
[recommended]
Please check your patch format.

~~vivek

On Mon, Oct 6, 2025 at 11:17=E2=80=AFPM Kshitij Paranjape
<[email-masked]> wrote:
>
> Cc: <[email-masked]>
> Reported-by: [email-masked]
> Closes: https://syzkaller.appspot.com/bug?extid=3D270f1c719ee7baab9941
> Signed-off-by: Kshitij Paranjape <[email-masked]>
> ---
>  drivers/scsi/sg.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
> index effb7e768165..9ae41bb256d7 100644
> --- a/drivers/scsi/sg.c
> +++ b/drivers/scsi/sg.c
> @@ -1888,6 +1888,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * s=
fp, int buff_size)
>                 if (num < PAGE_SIZE) {
>                         scatter_elem_sz =3D PAGE_SIZE;
>                         scatter_elem_sz_prev =3D PAGE_SIZE;
> +                       num =3D scatter_elem_sz;
>                 } else
>                         scatter_elem_sz_prev =3D num;
>         }
> --
> 2.43.0
>
>

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Nathan Chancellor <[email-masked]>,
	"Borislav Petkov (AMD)" <[email-masked]>,
	Sasha Levin <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-5.4] x86/build: Remove cc-option from stack alignment flags
Date: Mon,  6 Oct 2025 14:17:33 -0400
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From: Nathan Chancellor <[email-masked]>

[ Upstream commit d87208128a3330c0eab18301ab39bdb419647730 ]

'-mpreferred-stack-boundary' (the GCC option) and '-mstack-alignment'
(the clang option) have been supported in their respective compilers for
some time, so it is unnecessary to check for support for them via
cc-option. '-mpreferred-stack-boundary=3' had a restriction on
'-mno-sse' until GCC 7.1 but that is irrelevant for most of the kernel,
which includes '-mno-sse'.

Move to simple Kconfig checks to avoid querying the compiler for the
flags that it supports.

Signed-off-by: Nathan Chancellor <[email-masked]>
Signed-off-by: Borislav Petkov (AMD) <[email-masked]>
Link: https://lore.kernel.org/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

Based on my comprehensive analysis of this commit, here is my
determination:

## Backport Status: NO

### Extensive Analysis

**Commit Context:**
- Upstream commit: d87208128a3330c0eab18301ab39bdb419647730 (August 14,
  2025)
- Author: Nathan Chancellor
- Part of patch series: "x86-min-ver-cleanups-v1"
- Already backported to 6.17 stable as 8be33f616f1c4 via AUTOSEL
  (Automatic Stable Election)
- Target tree: linux-autosel-6.17 (kernel 6.17)

**What the Commit Does:**
The commit removes runtime compiler capability checks (`cc-option`) for
stack alignment flags and replaces them with build-time Kconfig checks:
- For GCC: Uses `CONFIG_CC_IS_GCC` to unconditionally set `-mpreferred-
  stack-boundary=2/3`
- For Clang: Uses `CONFIG_CC_IS_CLANG` to unconditionally set `-mstack-
  alignment=4/8`

**Code Changes Analysis:**
```makefile
# OLD: Runtime check if compiler supports the flags
-ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
+ifdef CONFIG_CC_IS_GCC
       cc_stack_align4 := -mpreferred-stack-boundary=2
       cc_stack_align8 := -mpreferred-stack-boundary=3
-else ifneq ($(call cc-option, -mstack-alignment=16),)
+endif
+ifdef CONFIG_CC_IS_CLANG
       cc_stack_align4 := -mstack-alignment=4
       cc_stack_align8 := -mstack-alignment=8
 endif
```

**Dependency Analysis:**
- Requires minimum GCC 8.1 for x86 (introduced in v6.15 via commit
  a3e8fe814ad1)
- Requires minimum Clang 15.0.0 for x86 (commit 7861640aac52b)
- Both requirements are satisfied in 6.17 stable tree (verified via
  scripts/min-tool-version.sh)
- GCC 7.1+ supports `-mpreferred-stack-boundary=3` with `-msse` (per GCC
  commit 34fac449e121)

**Evaluation Against Stable Kernel Rules:**

According to Documentation/process/stable-kernel-rules.rst, stable
patches must:

1. ✅ **Already exist in mainline**: YES -
   d87208128a3330c0eab18301ab39bdb419647730
2. ✅ **Obviously correct and tested**: YES - simple Makefile change, no
   issues found
3. ✅ **Not bigger than 100 lines**: YES - only 5 lines changed (3
   insertions, 2 deletions)
4. ✅ **Follow submitting-patches.rst rules**: YES
5. ❌ **Fix a real bug or add device ID**: **NO - This is the critical
   failure**

The rules explicitly state (lines 15-31 of stable-kernel-rules.rst):
> "It must either fix a real bug that bothers people or just add a
device ID."

This commit:
- Does **NOT** fix a bug (no oops, hang, data corruption, security
  issue, build error, etc.)
- Is a **cleanup/optimization** to improve build performance
- Provides **no user-visible bug fix**
- Falls under "trivial fixes without benefit for users" category (rule
  line 30-31)
- The original author did **NOT** tag it with `Cc:
  [email-masked]`

**Search for Issues/Regressions:**
- Searched Linux kernel mailing lists: No issues found
- Searched for reverts: None found
- Searched for build failures: None reported
- Part of systematic cleanup series with no reported problems

**Risk Assessment:**
- **Technical risk**: Very low - simple change, dependencies satisfied
- **Regression risk**: Very low - no functionality change, just build
  system optimization
- **Policy compliance**: **Does not meet stable kernel criteria**

### Conclusion

While this commit is technically safe and provides a marginal build-time
performance improvement by eliminating unnecessary runtime compiler
checks, **it does not meet the fundamental requirement for stable kernel
backporting**: it does not fix a bug that affects users.

The commit is purely a cleanup that removes obsolete code after compiler
minimum version requirements were raised. Such cleanups belong in
mainline development, not stable trees, which should focus exclusively
on fixing bugs that impact users.

The fact that it was auto-selected by AUTOSEL does not override the
documented stable kernel rules. This commit should be **rejected** from
stable backporting or **reverted** if already applied.

 arch/x86/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1913d342969ba..7cfc1b31f17e1 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -37,10 +37,11 @@ export RETPOLINE_VDSO_CFLAGS
 
 # For gcc stack alignment is specified with -mpreferred-stack-boundary,
 # clang has the option -mstack-alignment for that purpose.
-ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
+ifdef CONFIG_CC_IS_GCC
       cc_stack_align4 := -mpreferred-stack-boundary=2
       cc_stack_align8 := -mpreferred-stack-boundary=3
-else ifneq ($(call cc-option, -mstack-alignment=16),)
+endif
+ifdef CONFIG_CC_IS_CLANG
       cc_stack_align4 := -mstack-alignment=4
       cc_stack_align8 := -mstack-alignment=8
 endif
-- 
2.51.0

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Dapeng Mi <[email-masked]>,
	"Peter Zijlstra (Intel)" <[email-masked]>,
	Kan Liang <[email-masked]>,
	Yi Lai <[email-masked]>,
	Sasha Levin <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-6.12] perf/x86/intel: Add ICL_FIXED_0_ADAPTIVE bit into INTEL_FIXED_BITS_MASK
Date: Mon,  6 Oct 2025 14:17:40 -0400
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From: Dapeng Mi <[email-masked]>

[ Upstream commit 2676dbf9f4fb7f6739d1207c0f1deaf63124642a ]

ICL_FIXED_0_ADAPTIVE is missed to be added into INTEL_FIXED_BITS_MASK,
add it.

With help of this new INTEL_FIXED_BITS_MASK, intel_pmu_enable_fixed() can
be optimized. The old fixed counter control bits can be unconditionally
cleared with INTEL_FIXED_BITS_MASK and then set new control bits base on
new configuration.

Signed-off-by: Dapeng Mi <[email-masked]>
Signed-off-by: Peter Zijlstra (Intel) <[email-masked]>
Reviewed-by: Kan Liang <[email-masked]>
Tested-by: Yi Lai <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

**YES**

This commit should definitely be backported to stable kernel trees.

## Extensive Analysis

### Nature of the Bug

This commit fixes a **real and significant bug** in the Intel PMU
(Performance Monitoring Unit) fixed counter handling. The bug has
existed since kernel v6.5 when `INTEL_FIXED_BITS_MASK` was introduced in
commit 10d95a317ec12 (May 2023).

### Technical Details of the Bug

**In arch/x86/include/asm/perf_event.h:18-35:**

The original `INTEL_FIXED_BITS_MASK` was defined as `0xFULL` (binary
1111), covering only bits 0-3:
```c
-#define INTEL_FIXED_BITS_MASK                          0xFULL
```

However, the mask was missing `ICL_FIXED_0_ADAPTIVE` (bit 32), which has
existed since 2019 for Ice Lake adaptive PEBS v4 support (commit
c22497f5838c2). The fix correctly includes all relevant bits:
```c
+#define INTEL_FIXED_BITS_MASK                                  \
+       (INTEL_FIXED_0_KERNEL | INTEL_FIXED_0_USER |            \
+        INTEL_FIXED_0_ANYTHREAD | INTEL_FIXED_0_ENABLE_PMI |   \
+        ICL_FIXED_0_ADAPTIVE)
```

**In arch/x86/events/intel/core.c:2844-2896:**

The bug manifests in `intel_pmu_enable_fixed()` at lines 2888-2895. When
reconfiguring a fixed counter:

**Before the fix:**
- Line 2888 creates `mask` with only bits 0-3
- Lines 2890-2893 conditionally add `ICL_FIXED_0_ADAPTIVE` to both
  `bits` and `mask` only if PEBS is enabled
- Line 2895 clears bits using the incomplete mask
- **Problem:** If a counter previously had `ICL_FIXED_0_ADAPTIVE` set
  but the new configuration doesn't need it, the bit won't be cleared
  because it's not in the mask

**After the fix:**
- The mask always includes `ICL_FIXED_0_ADAPTIVE`
- Line 2890 unconditionally clears all relevant bits (including
  `ICL_FIXED_0_ADAPTIVE`)
- Lines 2890-2891 set `ICL_FIXED_0_ADAPTIVE` only when needed
- The code is cleaner and bug-free

### Impact Analysis

1. **Affected Hardware:** Intel Ice Lake (ICL) and newer processors with
   adaptive PEBS support

2. **Symptom:** The `ICL_FIXED_0_ADAPTIVE` bit can remain incorrectly
   set after reconfiguring performance counters, causing:
   - Incorrect PMU behavior
   - Adaptive PEBS being enabled when it should be disabled
   - Performance monitoring data corruption

3. **Severity:** This bug was explicitly identified as **"Bug #3"** in
   KVM commit 9e985cbf2942a (March 2024), which stated:
  > "Bug #3 is in perf. intel_pmu_disable_fixed() doesn't clear the
  upper bits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, and
  intel_pmu_enable_fixed() effectively doesn't clear
  ICL_FIXED_0_ADAPTIVE either. I.e. perf _always_ enables ADAPTIVE
  counters, regardless of what KVM requests."

4. **Security Context:** KVM had to **completely disable adaptive PEBS
   support** (with a Cc: stable tag) as a workaround for multiple bugs,
   including this one. The KVM commit mentioned potential security
   implications including LBR leaks.

### Why This Should Be Backported

1. ✅ **Fixes an important bug** affecting Intel processors since 2019
   (Ice Lake)
2. ✅ **Small, contained change** - only modifies a constant definition
   and simplifies existing code
3. ✅ **Low regression risk** - the change makes the mask complete and
   correct
4. ✅ **Well-reviewed and tested** - Reviewed-by: Kan Liang, Tested-by:
   Yi Lai (both from Intel)
5. ✅ **Addresses known issue** - this was explicitly identified in a
   previous security-related commit
6. ✅ **Affects both enable and disable paths** - also fixes
   `intel_pmu_disable_fixed()` at line 2562 which uses the same mask
7. ✅ **No architectural changes** - pure bug fix
8. ✅ **Stable since v6.5** - applies cleanly to all kernels since the
   mask was introduced

### Dependencies

This fix requires that `INTEL_FIXED_BITS_MASK` exists, which was
introduced in kernel v6.5. The fix should be backported to all stable
trees from **v6.5 onwards**.

### Conclusion

This is a textbook example of a commit suitable for stable backporting:
it fixes a real bug with clear symptoms, is small and low-risk, and has
been properly reviewed and tested. The fact that it addresses an issue
severe enough to warrant disabling an entire feature in KVM further
underscores its importance.

 arch/x86/events/intel/core.c      | 10 +++-------
 arch/x86/include/asm/perf_event.h |  6 +++++-
 arch/x86/kvm/pmu.h                |  2 +-
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index c2fb729c270ec..af47d266f8064 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -2845,8 +2845,8 @@ static void intel_pmu_enable_fixed(struct perf_event *event)
 {
 	struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
 	struct hw_perf_event *hwc = &event->hw;
-	u64 mask, bits = 0;
 	int idx = hwc->idx;
+	u64 bits = 0;
 
 	if (is_topdown_idx(idx)) {
 		struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
@@ -2885,14 +2885,10 @@ static void intel_pmu_enable_fixed(struct perf_event *event)
 
 	idx -= INTEL_PMC_IDX_FIXED;
 	bits = intel_fixed_bits_by_idx(idx, bits);
-	mask = intel_fixed_bits_by_idx(idx, INTEL_FIXED_BITS_MASK);
-
-	if (x86_pmu.intel_cap.pebs_baseline && event->attr.precise_ip) {
+	if (x86_pmu.intel_cap.pebs_baseline && event->attr.precise_ip)
 		bits |= intel_fixed_bits_by_idx(idx, ICL_FIXED_0_ADAPTIVE);
-		mask |= intel_fixed_bits_by_idx(idx, ICL_FIXED_0_ADAPTIVE);
-	}
 
-	cpuc->fixed_ctrl_val &= ~mask;
+	cpuc->fixed_ctrl_val &= ~intel_fixed_bits_by_idx(idx, INTEL_FIXED_BITS_MASK);
 	cpuc->fixed_ctrl_val |= bits;
 }
 
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 70d1d94aca7e6..ee943bd1595af 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -35,7 +35,6 @@
 #define ARCH_PERFMON_EVENTSEL_EQ			(1ULL << 36)
 #define ARCH_PERFMON_EVENTSEL_UMASK2			(0xFFULL << 40)
 
-#define INTEL_FIXED_BITS_MASK				0xFULL
 #define INTEL_FIXED_BITS_STRIDE			4
 #define INTEL_FIXED_0_KERNEL				(1ULL << 0)
 #define INTEL_FIXED_0_USER				(1ULL << 1)
@@ -48,6 +47,11 @@
 #define ICL_EVENTSEL_ADAPTIVE				(1ULL << 34)
 #define ICL_FIXED_0_ADAPTIVE				(1ULL << 32)
 
+#define INTEL_FIXED_BITS_MASK					\
+	(INTEL_FIXED_0_KERNEL | INTEL_FIXED_0_USER |		\
+	 INTEL_FIXED_0_ANYTHREAD | INTEL_FIXED_0_ENABLE_PMI |	\
+	 ICL_FIXED_0_ADAPTIVE)
+
 #define intel_fixed_bits_by_idx(_idx, _bits)			\
 	((_bits) << ((_idx) * INTEL_FIXED_BITS_STRIDE))
 
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index ad89d0bd60058..103604c4b33b5 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -13,7 +13,7 @@
 #define MSR_IA32_MISC_ENABLE_PMU_RO_MASK (MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL |	\
 					  MSR_IA32_MISC_ENABLE_BTS_UNAVAIL)
 
-/* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
+/* retrieve a fixed counter bits out of IA32_FIXED_CTR_CTRL */
 #define fixed_ctrl_field(ctrl_reg, idx) \
 	(((ctrl_reg) >> ((idx) * INTEL_FIXED_BITS_STRIDE)) & INTEL_FIXED_BITS_MASK)
 
-- 
2.51.0

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From: Sasha Levin <[email-masked]>
To: [email-masked],
	[email-masked]
Cc: Tejun Heo <[email-masked]>,
	Andrea Righi <[email-masked]>,
	Sasha Levin <[email-masked]>,
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	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH AUTOSEL 6.17-6.16] sched_ext: Keep bypass on between enable failure and scx_disable_workfn()
Date: Mon,  6 Oct 2025 14:17:39 -0400
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From: Tejun Heo <[email-masked]>

[ Upstream commit 4a1d9d73aabc8f97f48c4f84f936de3b265ffd6f ]

scx_enable() turns on the bypass mode while enable is in progress. If
enabling fails, it turns off the bypass mode and then triggers scx_error().
scx_error() will trigger scx_disable_workfn() which will turn on the bypass
mode again and unload the failed scheduler.

This moves the system out of bypass mode between the enable error path and
the disable path, which is unnecessary and can be brittle - e.g. the thread
running scx_enable() may already be on the failed scheduler and can be
switched out before it triggers scx_error() leading to a stall. The watchdog
would eventually kick in, so the situation isn't critical but is still
suboptimal.

There is nothing to be gained by turning off the bypass mode between
scx_enable() failure and scx_disable_workfn(). Keep bypass on.

Signed-off-by: Tejun Heo <[email-masked]>
Acked-by: Andrea Righi <[email-masked]>
Signed-off-by: Sasha Levin <[email-masked]>
---

LLM Generated explanations, may be completely bogus:

Based on my comprehensive analysis, here is my determination:

## **YES**

This commit should be backported to stable kernel trees.

### Detailed Analysis:

#### **Context and Timing:**
- **sched_ext introduction**: This feature was first introduced in
  kernel **v6.12** (confirmed via git tag analysis)
- **Applicability**: This commit is only relevant for kernels **v6.12
  and later** that include sched_ext
- **Current status**: The commit has **already been selected** for
  backporting to 6.17 (commit 2d013fc03f11a with Sasha Levin's sign-off)

#### **Bug Description and Impact:**
The code change addresses a **race condition in the error handling
path** during BPF scheduler enablement:

**Old behavior (buggy):**
1. Line 4580: `scx_bypass(true)` - Enable bypass mode during scheduler
   initialization
2. On error → Line 4708-4711: `scx_bypass(false)` - **Disable bypass
   mode**
3. Call `scx_error()` which triggers `scx_disable_workfn()`
4. Line 3873 in `scx_disable_workfn()`: `scx_bypass(true)` - Re-enable
   bypass mode

**Problem:** Between steps 2 and 4, the system is **out of bypass mode**
with a failed scheduler. The commit message explicitly states: *"the
thread running scx_enable() may already be on the failed scheduler and
can be switched out before it triggers scx_error() **leading to a
stall**"*

**New behavior (fixed):**
Simply **removes** the `scx_bypass(false)` call at line 4710, keeping
bypass mode continuously enabled from the failure point through the
entire disable sequence.

#### **Why This Should Be Backported:**

1. **Real Bug**: This fixes an actual stall condition (confirmed by
   author Tejun Heo and acked by Andrea Righi)

2. **User Impact**: While the watchdog eventually recovers, users
   experience **unnecessary stalls** when BPF schedulers fail to load -
   a real-world scenario

3. **Minimal Risk**:
   - **1-line change** (removal only)
   - Makes error path **more conservative** (keeps bypass on longer)
   - No new logic introduced
   - Only affects **error conditions**, not normal operation

4. **Stable Tree Criteria Met**:
   - ✅ Fixes important bug affecting users
   - ✅ Doesn't introduce new features
   - ✅ No architectural changes
   - ✅ Minimal regression risk
   - ✅ Confined to sched_ext subsystem

5. **Already Validated**: The autosel process has already selected this
   for 6.17, indicating automated analysis confirms its suitability

6. **Active Subsystem**: Multiple sched_ext fixes show this is under
   active maintenance and bug discovery

#### **Code Change Details:**
```c
// kernel/sched/ext.c, line 4708-4712
err_disable_unlock_all:
    scx_cgroup_unlock();
    percpu_up_write(&scx_fork_rwsem);
- scx_bypass(false);  // REMOVED
+   /* we'll soon enter disable path, keep bypass on */  // ADDED
COMMENT
err_disable:
```

This single-line removal prevents the problematic window where the
system exits bypass mode between error detection and cleanup,
eliminating the potential for stalls during scheduler enable failures.

 kernel/sched/ext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 088ceff38c8a4..2ccc885a229d5 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -5795,7 +5795,7 @@ static int scx_enable(struct sched_ext_ops *ops, struct bpf_link *link)
 err_disable_unlock_all:
 	scx_cgroup_unlock();
 	percpu_up_write(&scx_fork_rwsem);
-	scx_bypass(false);
+	/* we'll soon enter disable path, keep bypass on */
 err_disable:
 	mutex_unlock(&scx_enable_mutex);
 	/*
-- 
2.51.0

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Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
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From: Jacob Keller <[email-masked]>
Date: Wed, 01 Oct 2025 17:14:10 -0700

> For idpf:
> Milena fixes a memory leak in the idpf reset logic when the driver resets
> with an outstanding Tx timestamp.
> 
> Emil fixes a race condition in idpf_vport_stop() by using
> test_and_clear_bit() to ensure we execute idpf_vport_stop() once.
Patches 2-3 (at least) triggered a good bunch of compiler errors in
Tony's queue due to that XDP and XSk support for idpf went into net-next
already, but these patches weren't rebased and retested after that.

Thanks,
Olek

From - Fri Oct 17 14:26:29 2025
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Date: Mon, 6 Oct 2025 11:14:47 -0500
From: Bjorn Helgaas <[email-masked]>
To: Victor Paul <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>,
	Manivannan Sadhasivam <[email-masked]>,
	Lukas Wunner <[email-masked]>,
	Greg KH <[email-masked]>,
	Daniel Martin <[email-masked]>, [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH] PCI: probe: fix typo: CONFIG_PCI_PWRCTRL ->
 CONFIG_PCI_PWRCTL
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On Mon, Oct 06, 2025 at 06:37:14PM +0400, Victor Paul wrote:
> The commit
> 	8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
> introduced a typo, it uses CONFIG_PCI_PWRCTRL while the correct symbol
> is CONFIG_PCI_PWRCTL. As reported by Daniel Martin, it causes device
> initialization failures on some arm boards.
> I encountered it on sm8250-xiaomi-pipa after rebasing from v6.15.8
> to v6.15.11, with the following error:
> [    6.035321] pcieport 0000:00:00.0: Failed to create device link (0x180) with supplier qca6390-pmu for /soc@0/pcie@1c00000/pcie@0/wifi@0
> 
> Fix the typo to use the correct CONFIG_PCI_PWRCTL symbol.
> 
> Fixes: 8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
> Cc: [email-masked]
> Reported-by: Daniel Martin <[email-masked]>
> Closes: https://lore.kernel.org/linux-pci/2025081053-expectant-observant-6268@gregkh/
> Signed-off-by: Victor Paul <[email-masked]>

Might this be a stale .config file?

I think 13bbf6a5f065 ("PCI/pwrctrl: Rename pwrctrl Kconfig symbols and
slot module") should have resolved this. 

In the current upstream tree (fd94619c4336 ("Merge tag 'zonefs-6.18-rc1'
of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs"),
git grep "\<CONFIG_PCI_PWRCTL\>" finds nothing at all.

> ---
>  drivers/pci/probe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 19010c382864..7e97e33b3fb5 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -2508,7 +2508,7 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
>  }
>  EXPORT_SYMBOL(pci_bus_read_dev_vendor_id);
>  
> -#if IS_ENABLED(CONFIG_PCI_PWRCTRL)
> +#if IS_ENABLED(CONFIG_PCI_PWRCTL)
>  static struct platform_device *pci_pwrctrl_create_device(struct pci_bus *bus, int devfn)
>  {
>  	struct pci_host_bridge *host = pci_find_host_bridge(bus);
> -- 
> 2.51.0
> 

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Date: Mon, 6 Oct 2025 10:43:53 -0700
From: Manivannan Sadhasivam <[email-masked]>
To: Bjorn Helgaas <[email-masked]>
Cc: Victor Paul <[email-masked]>, 
	Bjorn Helgaas <[email-masked]>, Manivannan Sadhasivam <[email-masked]>, 
	Lukas Wunner <[email-masked]>, Greg KH <[email-masked]>, 
	Daniel Martin <[email-masked]>, [email-masked], [email-masked], 
	[email-masked]
Subject: Re: [PATCH] PCI: probe: fix typo: CONFIG_PCI_PWRCTRL ->
 CONFIG_PCI_PWRCTL
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On Mon, Oct 06, 2025 at 11:14:47AM -0500, Bjorn Helgaas wrote:
> On Mon, Oct 06, 2025 at 06:37:14PM +0400, Victor Paul wrote:
> > The commit
> > 	8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
> > introduced a typo, it uses CONFIG_PCI_PWRCTRL while the correct symbol
> > is CONFIG_PCI_PWRCTL. As reported by Daniel Martin, it causes device
> > initialization failures on some arm boards.
> > I encountered it on sm8250-xiaomi-pipa after rebasing from v6.15.8
> > to v6.15.11, with the following error:
> > [    6.035321] pcieport 0000:00:00.0: Failed to create device link (0x180) with supplier qca6390-pmu for /soc@0/pcie@1c00000/pcie@0/wifi@0
> > 
> > Fix the typo to use the correct CONFIG_PCI_PWRCTL symbol.
> > 
> > Fixes: 8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
> > Cc: [email-masked]
> > Reported-by: Daniel Martin <[email-masked]>
> > Closes: https://lore.kernel.org/linux-pci/2025081053-expectant-observant-6268@gregkh/
> > Signed-off-by: Victor Paul <[email-masked]>
> 
> Might this be a stale .config file?
> 
> I think 13bbf6a5f065 ("PCI/pwrctrl: Rename pwrctrl Kconfig symbols and
> slot module") should have resolved this. 
> 

Looks like 13bbf6a5f065 was not backported to 6.15 (since it is not a fix), but
8c493cc91f3a was (since it is a fix). But 6.15 is not LTS and the stable release
has been stopped with 6.15.11, we can't backport any fixes now.

So I think you should move on to 6.16 based kernel where the issue is not
present, or carry the fix in your tree.

- Mani

> In the current upstream tree (fd94619c4336 ("Merge tag 'zonefs-6.18-rc1'
> of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs"),
> git grep "\<CONFIG_PCI_PWRCTL\>" finds nothing at all.
> 
> > ---
> >  drivers/pci/probe.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> > index 19010c382864..7e97e33b3fb5 100644
> > --- a/drivers/pci/probe.c
> > +++ b/drivers/pci/probe.c
> > @@ -2508,7 +2508,7 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
> >  }
> >  EXPORT_SYMBOL(pci_bus_read_dev_vendor_id);
> >  
> > -#if IS_ENABLED(CONFIG_PCI_PWRCTRL)
> > +#if IS_ENABLED(CONFIG_PCI_PWRCTL)
> >  static struct platform_device *pci_pwrctrl_create_device(struct pci_bus *bus, int devfn)
> >  {
> >  	struct pci_host_bridge *host = pci_find_host_bridge(bus);
> > -- 
> > 2.51.0
> > 
> 

-- 
மணிவண்ணன் சதாசிவம்

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From: Kshitij Paranjape <[email-masked]>
To: "Martin K . Petersen" <[email-masked]>
Cc: Doug Gilbert <[email-masked]>,
	"James E . J . Bottomley" <[email-masked]>,
	[email-masked],
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	Kshitij Paranjape <[email-masked]>,
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	[email-masked]
Subject: [PATCH] scsi: fix shift out-of-bounds in sg_build_indirect The num variable is set to 0. The variable num gets its value from scatter_elem_sz.  However the minimum value of scatter_elem_sz is PAGE_SHIFT. So setting num to PAGE_SIZE when num < PAGE_SIZE.
Date: Mon,  6 Oct 2025 23:16:58 +0530
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Cc: <[email-masked]>
Reported-by: [email-masked]
Closes: https://syzkaller.appspot.com/bug?extid=270f1c719ee7baab9941
Signed-off-by: Kshitij Paranjape <[email-masked]>
---
 drivers/scsi/sg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index effb7e768165..9ae41bb256d7 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1888,6 +1888,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
 		if (num < PAGE_SIZE) {
 			scatter_elem_sz = PAGE_SIZE;
 			scatter_elem_sz_prev = PAGE_SIZE;
+			num = scatter_elem_sz;
 		} else
 			scatter_elem_sz_prev = num;
 	}
-- 
2.43.0

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Date: Mon, 6 Oct 2025 16:04:23 +0100
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: Jan Kara <[email-masked]>
Cc: Andrew Morton <[email-masked]>,
 David Hildenbrand <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>, Vlastimil Babka
 <[email-masked]>, Mike Rapoport <[email-masked]>,
 Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
 Amir Goldstein <[email-masked]>, [email-masked],
 [email-masked], [email-masked]
From: Ryan Roberts <[email-masked]>
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On 06/10/2025 15:55, Jan Kara wrote:
> On Fri 03-10-25 16:52:36, Ryan Roberts wrote:
>> fsnotify_mmap_perm() requires a byte offset for the file about to be
>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
>> Previously the conversion was done incorrectly so let's fix it, being
>> careful not to overflow on 32-bit platforms.
>>
>> Discovered during code review.
>>
>> Cc: <[email-masked]>
>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
>> Signed-off-by: Ryan Roberts <[email-masked]>
>> ---
>> Applies against today's mm-unstable (aa05a436eca8).
> 
> Thanks Ryan! I've added the patch to my tree. As a side note, I know the
> callsite is in mm/ but since this is clearly impacting fsnotify, it would
> be good to add to CC relevant people (I'm not following linux-mm nor
> linux-kernel) and discovered this only because of Kiryl's link...

Ahh good point... Sorry I was sleepwalking through the process on Friday
afternoon and blindly sent it to the maintainers and reviewers that
get_maintainer.pl spat out. It didn't even occur to me that this wasn't an mm
thing. :-|

> 
> 								Honza
> 
>>  mm/util.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/util.c b/mm/util.c
>> index 6c1d64ed0221..8989d5767528 100644
>> --- a/mm/util.c
>> +++ b/mm/util.c
>> @@ -566,6 +566,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>>  	unsigned long len, unsigned long prot,
>>  	unsigned long flag, unsigned long pgoff)
>>  {
>> +	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
>>  	unsigned long ret;
>>  	struct mm_struct *mm = current->mm;
>>  	unsigned long populate;
>> @@ -573,7 +574,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>>
>>  	ret = security_mmap_file(file, prot, flag);
>>  	if (!ret)
>> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
>> +		ret = fsnotify_mmap_perm(file, prot, off, len);
>>  	if (!ret) {
>>  		if (mmap_write_lock_killable(mm))
>>  			return -EINTR;
>> --
>> 2.43.0
>>

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Date: Mon, 6 Oct 2025 17:16:53 +0200
From: Jan Kara <[email-masked]>
To: Ryan Roberts <[email-masked]>
Cc: Jan Kara <[email-masked]>, Andrew Morton <[email-masked]>, 
	David Hildenbrand <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
	"Liam R. Howlett" <[email-masked]>, Vlastimil Babka <[email-masked]>, 
	Mike Rapoport <[email-masked]>, Suren Baghdasaryan <[email-masked]>, 
	Michal Hocko <[email-masked]>, Amir Goldstein <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
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On Mon 06-10-25 16:04:23, Ryan Roberts wrote:
> On 06/10/2025 15:55, Jan Kara wrote:
> > On Fri 03-10-25 16:52:36, Ryan Roberts wrote:
> >> fsnotify_mmap_perm() requires a byte offset for the file about to be
> >> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> >> Previously the conversion was done incorrectly so let's fix it, being
> >> careful not to overflow on 32-bit platforms.
> >>
> >> Discovered during code review.
> >>
> >> Cc: <[email-masked]>
> >> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> >> Signed-off-by: Ryan Roberts <[email-masked]>
> >> ---
> >> Applies against today's mm-unstable (aa05a436eca8).
> > 
> > Thanks Ryan! I've added the patch to my tree. As a side note, I know the
> > callsite is in mm/ but since this is clearly impacting fsnotify, it would
> > be good to add to CC relevant people (I'm not following linux-mm nor
> > linux-kernel) and discovered this only because of Kiryl's link...
> 
> Ahh good point... Sorry I was sleepwalking through the process on Friday
> afternoon and blindly sent it to the maintainers and reviewers that
> get_maintainer.pl spat out. It didn't even occur to me that this wasn't an mm
> thing. :-|

No harm done really. The change is an obvious fix and it would find its way
to the kernel sooner or later. As I wrote above, this is just a note for
the future to think a bit about patch recipients before hitting send :) It
may help to get the patch merged faster.

								Honza

> >>  mm/util.c | 3 ++-
> >>  1 file changed, 2 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/mm/util.c b/mm/util.c
> >> index 6c1d64ed0221..8989d5767528 100644
> >> --- a/mm/util.c
> >> +++ b/mm/util.c
> >> @@ -566,6 +566,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
> >>  	unsigned long len, unsigned long prot,
> >>  	unsigned long flag, unsigned long pgoff)
> >>  {
> >> +	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
> >>  	unsigned long ret;
> >>  	struct mm_struct *mm = current->mm;
> >>  	unsigned long populate;
> >> @@ -573,7 +574,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
> >>
> >>  	ret = security_mmap_file(file, prot, flag);
> >>  	if (!ret)
> >> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
> >> +		ret = fsnotify_mmap_perm(file, prot, off, len);
> >>  	if (!ret) {
> >>  		if (mmap_write_lock_killable(mm))
> >>  			return -EINTR;
> >> --
> >> 2.43.0
> >>
> 
-- 
Jan Kara <[email-masked]>
SUSE Labs, CR

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Date: Mon, 6 Oct 2025 17:19:42 +0200
Subject: Re: [PATCH net] xsk: Fix overflow in descriptor validation@@
To: Ilia Gavrilov <[email-masked]>
CC: Magnus Karlsson <[email-masked]>, Maciej Fijalkowski
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References: <[email-masked]>
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From: Ilia Gavrilov <[email-masked]>
Date: Mon, 6 Oct 2025 08:53:17 +0000

> The desc->len value can be set up to U32_MAX. If umem tx_metadata_len

In theory. Never in practice.

> option is also set, then the value of the expression
> 'desc->len + pool->tx_metadata_len' can overflow and validation
> of the incorrect descriptor will be successfully passed.
> This can lead to a subsequent chain of arithmetic overflows
> in the xsk_build_skb() function and incorrect sk_buff allocation.
> 
> Found by InfoTeCS on behalf of Linux Verification Center
> (linuxtesting.org) with SVACE.

I think the general rule for sending fixes is that a fix must fix a real
bug which can be reproduced in real life scenarios.
Static Analysis Tools have no idea that nobody sends 4 Gb sized network
packets.

> 
> Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
> Cc: [email-masked]
> Signed-off-by: Ilia Gavrilov <[email-masked]>
> ---
>  net/xdp/xsk_queue.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
Thanks,
Olek

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From: Hugo Villeneuve <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>,
	Jiri Slaby <[email-masked]>,
	Florian Vallee <[email-masked]>
Cc: [email-masked],
	Hugo Villeneuve <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Date: Mon,  6 Oct 2025 10:20:02 -0400
Subject: [PATCH] serial: sc16is7xx: remove useless enable of enhanced features
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From: Hugo Villeneuve <[email-masked]>

Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once
probed") permanently enabled access to the enhanced features in
sc16is7xx_probe(), and it is never disabled after that.

Therefore, remove re-enable of enhanced features in
sc16is7xx_set_baud(). This eliminates a potential useless read + write
cycle each time the baud rate is reconfigured.

Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed")
Cc: [email-masked]
Signed-off-by: Hugo Villeneuve <[email-masked]>
---
This patch was originally part of this series:
https://lore.kernel.org/linux-serial/[email-masked]/raw
and it is now separate as suggested by Greg to facilitate stable backporting.
---
 drivers/tty/serial/sc16is7xx.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 1a2c4c14f6aac..c7435595dce13 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud)
 		div /= prescaler;
 	}
 
-	/* Enable enhanced features */
-	sc16is7xx_efr_lock(port);
-	sc16is7xx_port_update(port, SC16IS7XX_EFR_REG,
-			      SC16IS7XX_EFR_ENABLE_BIT,
-			      SC16IS7XX_EFR_ENABLE_BIT);
-	sc16is7xx_efr_unlock(port);
-
 	/* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */
 	sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
 			      SC16IS7XX_MCR_CLKSEL_BIT,

base-commit: fd94619c43360eb44d28bd3ef326a4f85c600a07
-- 
2.39.5

From - Fri Oct 17 14:26:29 2025
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From: Amir Goldstein <[email-masked]>
Date: Mon, 6 Oct 2025 16:40:00 +0200
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: David Hildenbrand <[email-masked]>
Cc: Ryan Roberts <[email-masked]>, Andrew Morton <[email-masked]>, 
	Lorenzo Stoakes <[email-masked]>, "Liam R. Howlett" <[email-masked]>, 
	Vlastimil Babka <[email-masked]>, Mike Rapoport <[email-masked]>, Suren Baghdasaryan <[email-masked]>, 
	Michal Hocko <[email-masked]>, [email-masked], [email-masked], 
	[email-masked], Jan Kara <[email-masked]>
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                             [amir73il[at]gmail.com]
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On Mon, Oct 6, 2025 at 3:53=E2=80=AFPM David Hildenbrand <[email-masked]>=
 wrote:
>
> On 06.10.25 14:14, Ryan Roberts wrote:
> > On 06/10/2025 12:36, David Hildenbrand wrote:
> >> On 03.10.25 17:52, Ryan Roberts wrote:
> >>> fsnotify_mmap_perm() requires a byte offset for the file about to be
> >>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offs=
et.
> >>> Previously the conversion was done incorrectly so let's fix it, being
> >>> careful not to overflow on 32-bit platforms.
> >>>
> >>> Discovered during code review.
> >>>
> >>> Cc: <[email-masked]>
> >>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> >>> Signed-off-by: Ryan Roberts <[email-masked]>
> >>> ---
> >>> Applies against today's mm-unstable (aa05a436eca8).
> >>>
> >>
> >> Curious: is there some easy way to write a reproducer? Did you look in=
to that?
> >
> > I didn't; this was just a drive-by discovery.
> >
> > It looks like there are some fanotify tests in the filesystems selftest=
s; I
> > guess they could be extended to add a regression test?
> >
> > But FWIW, I think the kernel is just passing the ofset/length info off =
to user
> > space and isn't acting on it itself. So there is no kernel vulnerabilit=
y here.
>
> Right, I'm rather wondering if this could have been caught earlier and
> how we could have caught it earlier :)

Ha! you would have thought we either have no test for it or we test
only mmap with offset 0.

But we have LTP test fanotify24 which does mmap with offset page_sz*100
and indeed it prints the info and info says offset 0, only we do not verify=
 the
offset info in this test...

Will be fixed.

Thanks Ryan for being alert!
Amir.

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From: Victor Paul <[email-masked]>
To: Bjorn Helgaas <[email-masked]>
Cc: Manivannan Sadhasivam <[email-masked]>,
	Lukas Wunner <[email-masked]>,
	Greg KH <[email-masked]>,
	Daniel Martin <[email-masked]>,
	[email-masked],
	[email-masked],
	Victor Paul <[email-masked]>,
	[email-masked]
Subject: [PATCH] PCI: probe: fix typo: CONFIG_PCI_PWRCTRL -> CONFIG_PCI_PWRCTL
Date: Mon,  6 Oct 2025 18:37:14 +0400
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The commit
	8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
introduced a typo, it uses CONFIG_PCI_PWRCTRL while the correct symbol
is CONFIG_PCI_PWRCTL. As reported by Daniel Martin, it causes device
initialization failures on some arm boards.
I encountered it on sm8250-xiaomi-pipa after rebasing from v6.15.8
to v6.15.11, with the following error:
[    6.035321] pcieport 0000:00:00.0: Failed to create device link (0x180) with supplier qca6390-pmu for /soc@0/pcie@1c00000/pcie@0/wifi@0

Fix the typo to use the correct CONFIG_PCI_PWRCTL symbol.

Fixes: 8c493cc91f3a ("PCI/pwrctrl: Create pwrctrl devices only when CONFIG_PCI_PWRCTRL is enabled")
Cc: [email-masked]
Reported-by: Daniel Martin <[email-masked]>
Closes: https://lore.kernel.org/linux-pci/2025081053-expectant-observant-6268@gregkh/
Signed-off-by: Victor Paul <[email-masked]>
---
 drivers/pci/probe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 19010c382864..7e97e33b3fb5 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2508,7 +2508,7 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
 }
 EXPORT_SYMBOL(pci_bus_read_dev_vendor_id);
 
-#if IS_ENABLED(CONFIG_PCI_PWRCTRL)
+#if IS_ENABLED(CONFIG_PCI_PWRCTL)
 static struct platform_device *pci_pwrctrl_create_device(struct pci_bus *bus, int devfn)
 {
 	struct pci_host_bridge *host = pci_find_host_bridge(bus);
-- 
2.51.0

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Date: Mon, 6 Oct 2025 16:55:14 +0200
From: Jan Kara <[email-masked]>
To: Ryan Roberts <[email-masked]>
Cc: Andrew Morton <[email-masked]>, 
	David Hildenbrand <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
	"Liam R. Howlett" <[email-masked]>, Vlastimil Babka <[email-masked]>, 
	Mike Rapoport <[email-masked]>, Suren Baghdasaryan <[email-masked]>, 
	Michal Hocko <[email-masked]>, Amir Goldstein <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
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On Fri 03-10-25 16:52:36, Ryan Roberts wrote:
> fsnotify_mmap_perm() requires a byte offset for the file about to be
> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> Previously the conversion was done incorrectly so let's fix it, being
> careful not to overflow on 32-bit platforms.
> 
> Discovered during code review.
> 
> Cc: <[email-masked]>
> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> Signed-off-by: Ryan Roberts <[email-masked]>
> ---
> Applies against today's mm-unstable (aa05a436eca8).

Thanks Ryan! I've added the patch to my tree. As a side note, I know the
callsite is in mm/ but since this is clearly impacting fsnotify, it would
be good to add to CC relevant people (I'm not following linux-mm nor
linux-kernel) and discovered this only because of Kiryl's link...

								Honza

>  mm/util.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/util.c b/mm/util.c
> index 6c1d64ed0221..8989d5767528 100644
> --- a/mm/util.c
> +++ b/mm/util.c
> @@ -566,6 +566,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>  	unsigned long len, unsigned long prot,
>  	unsigned long flag, unsigned long pgoff)
>  {
> +	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
>  	unsigned long ret;
>  	struct mm_struct *mm = current->mm;
>  	unsigned long populate;
> @@ -573,7 +574,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
> 
>  	ret = security_mmap_file(file, prot, flag);
>  	if (!ret)
> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
> +		ret = fsnotify_mmap_perm(file, prot, off, len);
>  	if (!ret) {
>  		if (mmap_write_lock_killable(mm))
>  			return -EINTR;
> --
> 2.43.0
> 
-- 
Jan Kara <[email-masked]>
SUSE Labs, CR

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From: John Paul Adrian Glaubitz <[email-masked]>
To: Jens Axboe <[email-masked]>,
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	[email-masked],
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	[email-masked]
Subject: [PATCH v3] Revert "sunvdc: Do not spin in an infinite loop when vio_ldc_send() returns EAGAIN"
Date: Mon,  6 Oct 2025 15:05:42 +0200
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In a11f6ca9aef9 ("sunvdc: Do not spin in an infinite loop when vio_ldc_send()
returns EAGAIN"), a maximum retry count was added to __vdc_tx_trigger().

After this change, several users reported disk I/O errors when running Linux
inside a logical domain on Solaris 11.4:

[19095.192532] sunvdc: vdc_tx_trigger() failure, err=-11
[19095.192605] I/O error, dev vdiskc, sector 368208928 op 0x1:(WRITE) flags 0x1000 phys_seg 2 prio class 2
[19095.205681] XFS (vdiskc1): metadata I/O error in "xfs_buf_ioend+0x28c/0x600 [xfs]" at daddr 0x15f26420 len 32 error 5
[19432.043471] sunvdc: vdc_tx_trigger() failure, err=-11
[19432.043529] I/O error, dev vdiskc, sector 3732568 op 0x1:(WRITE) flags 0x1000 phys_seg 1 prio class 2
[19432.058821] sunvdc: vdc_tx_trigger() failure, err=-11
[19432.058843] I/O error, dev vdiskc, sector 3736256 op 0x1:(WRITE) flags 0x1000 phys_seg 4 prio class 2
[19432.074109] sunvdc: vdc_tx_trigger() failure, err=-11
[19432.074128] I/O error, dev vdiskc, sector 3736512 op 0x1:(WRITE) flags 0x1000 phys_seg 4 prio class 2
[19432.089425] sunvdc: vdc_tx_trigger() failure, err=-11
[19432.089443] I/O error, dev vdiskc, sector 3737024 op 0x1:(WRITE) flags 0x1000 phys_seg 1 prio class 2
[19432.100964] XFS (vdiskc1): metadata I/O error in "xfs_buf_ioend+0x28c/0x600 [xfs]" at daddr 0x38ec58 len 8 error 5

Since this change seems to have only been justified by reading the code which
becomes evident by the reference to adddc32d6fde ("sunvnet: Do not spin in an
infinite loop when vio_ldc_send() returns EAGAIN") in the commit message, it
can be safely assumed that the change was neither properly tested nor motivated
by any actual bug reports.

Thus, let's revert this change to address the disk I/O errors above.

Cc: [email-masked]
Fixes: a11f6ca9aef9 ("sunvdc: Do not spin in an infinite loop when vio_ldc_send() returns EAGAIN")

Signed-off-by: John Paul Adrian Glaubitz <[email-masked]>
---
Changes since v1:
- Rephrase commit message
Changes since v2:
- Add missing CC and Fixes tags
---
 drivers/block/sunvdc.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 282f81616a78..f56023c2b033 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -45,8 +45,6 @@ MODULE_VERSION(DRV_MODULE_VERSION);
 #define WAITING_FOR_GEN_CMD	0x04
 #define WAITING_FOR_ANY		-1
 
-#define	VDC_MAX_RETRIES	10
-
 static struct workqueue_struct *sunvdc_wq;
 
 struct vdc_req_entry {
@@ -437,7 +435,6 @@ static int __vdc_tx_trigger(struct vdc_port *port)
 		.end_idx		= dr->prod,
 	};
 	int err, delay;
-	int retries = 0;
 
 	hdr.seq = dr->snd_nxt;
 	delay = 1;
@@ -450,8 +447,6 @@ static int __vdc_tx_trigger(struct vdc_port *port)
 		udelay(delay);
 		if ((delay <<= 1) > 128)
 			delay = 128;
-		if (retries++ > VDC_MAX_RETRIES)
-			break;
 	} while (err == -EAGAIN);
 
 	if (err == -ENOTCONN)
-- 
2.47.3

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Date: Mon, 6 Oct 2025 15:52:22 +0200
From: Mika Westerberg <[email-masked]>
To: Brian Norris <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
	[email-masked], [email-masked],
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Subject: Re: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
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Hi,

On Fri, Oct 03, 2025 at 03:40:09PM -0700, Brian Norris wrote:
> From: Brian Norris <[email-masked]>
> 
> When transitioning to D3cold, __pci_set_power_state() will first
> transition a device to D3hot. If the device was already in D3hot, this
> will add excess work:
> (a) read/modify/write PMCSR; and
> (b) excess delay (pci_dev_d3_sleep()).

How come the device is already in D3hot when __pci_set_power_state() is
called? IIRC PCI core will transition the device to low power state so that
it passes there the deepest possible state, and at that point the device is
still in D0. Then __pci_set_power_state() puts it into D3hot and then turns
if the power resource -> D3cold.

What I'm missing here?

> For (b), we already performed the necessary delay on the previous D3hot
> entry; this was extra noticeable when evaluating runtime PM transition
> latency.
> 
> Check whether we're already in the target state before continuing.
> 
> Note that __pci_set_power_state() already does this same check for other
> state transitions, but D3cold is special because __pci_set_power_state()
> converts it to D3hot for the purposes of PMCSR.
> 
> This seems to be an oversight in commit 0aacdc957401 ("PCI/PM: Clean up
> pci_set_low_power_state()").
> 
> Fixes: 0aacdc957401 ("PCI/PM: Clean up pci_set_low_power_state()")
> Cc: <[email-masked]>
> Signed-off-by: Brian Norris <[email-masked]>
> Signed-off-by: Brian Norris <[email-masked]>

BTW, I think only one SoB from you is enough ;-)

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Date: Mon, 6 Oct 2025 15:53:46 +0200
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: Ryan Roberts <[email-masked]>,
 Andrew Morton <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>, Vlastimil Babka
 <[email-masked]>, Mike Rapoport <[email-masked]>,
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Cc: [email-masked], [email-masked], [email-masked]
From: David Hildenbrand <[email-masked]>
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On 06.10.25 14:14, Ryan Roberts wrote:
> On 06/10/2025 12:36, David Hildenbrand wrote:
>> On 03.10.25 17:52, Ryan Roberts wrote:
>>> fsnotify_mmap_perm() requires a byte offset for the file about to be
>>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
>>> Previously the conversion was done incorrectly so let's fix it, being
>>> careful not to overflow on 32-bit platforms.
>>>
>>> Discovered during code review.
>>>
>>> Cc: <[email-masked]>
>>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
>>> Signed-off-by: Ryan Roberts <[email-masked]>
>>> ---
>>> Applies against today's mm-unstable (aa05a436eca8).
>>>
>>
>> Curious: is there some easy way to write a reproducer? Did you look into that?
> 
> I didn't; this was just a drive-by discovery.
> 
> It looks like there are some fanotify tests in the filesystems selftests; I
> guess they could be extended to add a regression test?
> 
> But FWIW, I think the kernel is just passing the ofset/length info off to user
> space and isn't acting on it itself. So there is no kernel vulnerability here.

Right, I'm rather wondering if this could have been caught earlier and 
how we could have caught it earlier :)

-- 
Cheers

David / dhildenb

From - Fri Oct 17 14:26:30 2025
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Date: Mon, 6 Oct 2025 19:39:28 +0530
Subject: Re: [PATCH] media: iris: Fix ffmpeg corrupted frame error
To: Vishnu Reddy <[email-masked]>,
        [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked]
Cc: [email-masked], [email-masked],
        [email-masked], [email-masked]
From: Vikash Garodia <[email-masked]>
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On 10/6/2025 2:48 PM, Vishnu Reddy wrote:
> When the ffmpeg decoder is running, the driver receives the
> V4L2_BUF_FLAG_KEYFRAME flag in the input buffer. The driver then forwards
> this flag information to the firmware. The firmware, in turn, copies the
> input buffer flags directly into the output buffer flags. Upon receiving
> the output buffer from the firmware, the driver observes that the buffer
> contains the HFI_BUFFERFLAG_DATACORRUPT flag. The root cause is that both
> V4L2_BUF_FLAG_KEYFRAME and HFI_BUFFERFLAG_DATACORRUPT are the same value.
> As a result, the driver incorrectly interprets the output frame as
> corrupted, even though the frame is actually valid. This misinterpretation
> causes the driver to report an error and skip good frames, leading to
> missing frames in the final video output and triggering ffmpeg's "corrupt
> decoded frame" error.
> 
> To resolve this issue, the input buffer flags should not be sent to the
> firmware during decoding, since the firmware does not require this
> information.
> 
> Fixes: 17f2a485ca67 ("media: iris: implement vb2 ops for buf_queue and firmware response")
> Cc: [email-masked]
> Signed-off-by: Vishnu Reddy <[email-masked]>
> ---
>  drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> index e1788c266bb1..4de03f31eaf3 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> @@ -282,7 +282,7 @@ static int iris_hfi_gen1_queue_input_buffer(struct iris_inst *inst, struct iris_
>  		com_ip_pkt.shdr.session_id = inst->session_id;
>  		com_ip_pkt.time_stamp_hi = upper_32_bits(buf->timestamp);
>  		com_ip_pkt.time_stamp_lo = lower_32_bits(buf->timestamp);
> -		com_ip_pkt.flags = buf->flags;
> +		com_ip_pkt.flags = 0;
>  		com_ip_pkt.mark_target = 0;
>  		com_ip_pkt.mark_data = 0;
>  		com_ip_pkt.offset = buf->data_offset;

Reviewed-by: Vikash Garodia <[email-masked]>

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Subject: Re: Linux 6.17.1
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Date: Mon, 6 Oct 2025 12:19:54 +0200
Subject: Re: [PATCH] drm/mediatek: fix device use-after-free on unbind
To: Johan Hovold <[email-masked]>, Chun-Kuang Hu <[email-masked]>,
 Philipp Zabel <[email-masked]>
Cc: David Airlie <[email-masked]>, Simona Vetter <[email-masked]>,
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 Ma Ke <[email-masked]>, Sjoerd Simons <[email-masked]>,
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From: AngeloGioacchino Del Regno <[email-masked]>
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Il 06/10/25 11:39, Johan Hovold ha scritto:
> A recent change fixed device reference leaks when looking up drm
> platform device driver data during bind() but failed to remove a partial
> fix which had been added by commit 80805b62ea5b ("drm/mediatek: Fix
> kobject put for component sub-drivers").
> 
> This results in a reference imbalance on component bind() failures and
> on unbind() which could lead to a user-after-free.
> 
> Make sure to only drop the references after retrieving the driver data
> by effectively reverting the previous partial fix.
> 
> Note that holding a reference to a device does not prevent its driver
> data from going away so there is no point in keeping the reference.
> 
> Fixes: 1f403699c40f ("drm/mediatek: Fix device/node reference count leaks in mtk_drm_get_all_drm_priv")
> Reported-by: Sjoerd Simons <[email-masked]>
> Link: https://lore.kernel.org/r/[email-masked]
> Cc: [email-masked]
> Cc: Ma Ke <[email-masked]>
> Cc: AngeloGioacchino Del Regno <[email-masked]>
> Signed-off-by: Johan Hovold <[email-masked]>

Heh, nice!

Reviewed-by: AngeloGioacchino Del Regno <[email-masked]>

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Date: Mon, 6 Oct 2025 12:47:45 +0200
From: Greg KH <[email-masked]>
To: Eliav Farber <[email-masked]>
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	[email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH v2 07/19 5.15.y] minmax: simplify and clarify
 min_t()/max_t() implementation
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On Fri, Oct 03, 2025 at 12:59:54PM +0000, Eliav Farber wrote:
> From: Linus Torvalds <[email-masked]>
> 
> [ Upstream commit 017fa3e89187848fd056af757769c9e66ac3e93d ]
> 
> This simplifies the min_t() and max_t() macros by no longer making them
> work in the context of a C constant expression.
> 
> That means that you can no longer use them for static initializers or
> for array sizes in type definitions, but there were only a couple of
> such uses, and all of them were converted (famous last words) to use
> MIN_T/MAX_T instead.
> 
> Cc: David Laight <[email-masked]>
> Cc: Lorenzo Stoakes <[email-masked]>
> Signed-off-by: Linus Torvalds <[email-masked]>
> Signed-off-by: Eliav Farber <[email-masked]>

Eliav, your testing infrastructure needs some work, this patch breaks
the build on this kernel tree:

In file included from ./include/linux/kernel.h:16,
                 from ./include/linux/list.h:9,
                 from ./include/linux/wait.h:7,
                 from ./include/linux/wait_bit.h:8,
                 from ./include/linux/fs.h:6,
                 from fs/erofs/internal.h:10,
                 from fs/erofs/zdata.h:9,
                 from fs/erofs/zdata.c:6:
fs/erofs/zdata.c: In function ‘z_erofs_decompress_pcluster’:
fs/erofs/zdata.h:185:61: error: ISO C90 forbids variable length array ‘pages_onstack’ [-Werror=vla]
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |                                                             ^~~~
./include/linux/minmax.h:49:23: note: in definition of macro ‘__cmp_once_unique’
   49 |         ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
      |                       ^
./include/linux/minmax.h:164:27: note: in expansion of macro ‘__cmp_once’
  164 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
      |                           ^~~~~~~~~~
fs/erofs/zdata.h:185:9: note: in expansion of macro ‘min_t’
  185 |         min_t(unsigned int, THREAD_SIZE / 8 / sizeof(struct page *), 96U)
      |         ^~~~~
fs/erofs/zdata.c:847:36: note: in expansion of macro ‘Z_EROFS_VMAP_ONSTACK_PAGES’
  847 |         struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES];
      |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

I'll drop this whole series, please do a bit more testing before sending
out a new version.

thanks,

greg k-h

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Date: Mon, 6 Oct 2025 13:36:40 +0200
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: Ryan Roberts <[email-masked]>,
 Andrew Morton <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>, Vlastimil Babka
 <[email-masked]>, Mike Rapoport <[email-masked]>,
 Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
 Amir Goldstein <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked]
From: David Hildenbrand <[email-masked]>
Autocrypt: addr=[email-masked]; keydata=
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On 03.10.25 17:52, Ryan Roberts wrote:
> fsnotify_mmap_perm() requires a byte offset for the file about to be
> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> Previously the conversion was done incorrectly so let's fix it, being
> careful not to overflow on 32-bit platforms.
> 
> Discovered during code review.
> 
> Cc: <[email-masked]>
> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> Signed-off-by: Ryan Roberts <[email-masked]>
> ---
> Applies against today's mm-unstable (aa05a436eca8).
>

Curious: is there some easy way to write a reproducer? Did you look into 
that?

LGTM, thanks

Acked-by: David Hildenbrand <[email-masked]>

-- 
Cheers

David / dhildenb

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Date: Mon, 6 Oct 2025 13:14:02 +0100
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: David Hildenbrand <[email-masked]>,
 Andrew Morton <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>, Vlastimil Babka
 <[email-masked]>, Mike Rapoport <[email-masked]>,
 Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
 Amir Goldstein <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked]
From: Ryan Roberts <[email-masked]>
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On 06/10/2025 12:36, David Hildenbrand wrote:
> On 03.10.25 17:52, Ryan Roberts wrote:
>> fsnotify_mmap_perm() requires a byte offset for the file about to be
>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
>> Previously the conversion was done incorrectly so let's fix it, being
>> careful not to overflow on 32-bit platforms.
>>
>> Discovered during code review.
>>
>> Cc: <[email-masked]>
>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
>> Signed-off-by: Ryan Roberts <[email-masked]>
>> ---
>> Applies against today's mm-unstable (aa05a436eca8).
>>
> 
> Curious: is there some easy way to write a reproducer? Did you look into that?

I didn't; this was just a drive-by discovery.

It looks like there are some fanotify tests in the filesystems selftests; I
guess they could be extended to add a regression test?

But FWIW, I think the kernel is just passing the ofset/length info off to user
space and isn't acting on it itself. So there is no kernel vulnerability here.

> 
> LGTM, thanks
> 
> Acked-by: David Hildenbrand <[email-masked]>
> 

From - Fri Oct 17 14:26:30 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
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	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.17.1
Date: Mon,  6 Oct 2025 11:56:32 +0200
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I'm announcing the release of the 6.17.1 kernel.

All users of the 6.17 kernel series must upgrade.

The updated 6.17.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.17.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                       |    2 
 block/blk-mq-tag.c                             |    1 
 drivers/media/i2c/tc358743.c                   |    4 -
 drivers/media/pci/b2c2/flexcop-pci.c           |    2 
 drivers/media/platform/qcom/iris/iris_buffer.c |   10 +++
 drivers/media/platform/st/stm32/stm32-csi.c    |    4 -
 drivers/media/rc/imon.c                        |   27 ++++++---
 drivers/media/tuners/xc5000.c                  |    2 
 drivers/media/usb/uvc/uvc_driver.c             |   73 +++++++++++++++----------
 drivers/media/usb/uvc/uvcvideo.h               |    2 
 drivers/net/wireless/ath/ath11k/qmi.c          |    2 
 drivers/net/wireless/realtek/rtw89/core.c      |   30 ++++++++--
 drivers/net/wireless/realtek/rtw89/core.h      |   35 +++++++++++
 drivers/net/wireless/realtek/rtw89/pci.c       |    3 -
 drivers/net/wireless/realtek/rtw89/ser.c       |    2 
 drivers/target/target_core_configfs.c          |    2 
 mm/swapfile.c                                  |    3 +
 scripts/gcc-plugins/gcc-common.h               |    7 ++
 sound/soc/qcom/qdsp6/topology.c                |    4 -
 sound/usb/midi.c                               |    9 +--
 20 files changed, 165 insertions(+), 59 deletions(-)

Chandra Mohan Sundar (1):
      media: stm32-csi: Fix dereference before NULL check

Charan Teja Kalla (1):
      mm: swap: check for stable address space before operating on the VMA

Dikshita Agarwal (1):
      media: iris: Fix memory leak by freeing untracked persist buffer

Duoming Zhou (3):
      media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove
      media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe
      media: tuner: xc5000: Fix use-after-free in xc5000_release

Fedor Pchelkin (1):
      wifi: rtw89: fix use-after-free in rtw89_core_tx_kick_off_and_wait()

Greg Kroah-Hartman (1):
      Linux 6.17.1

Jeongjun Park (1):
      ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

Kees Cook (1):
      gcc-plugins: Remove TODO_verify_il for GCC >= 16

Larshin Sergey (1):
      media: rc: fix races with imon_disconnect()

Matvey Kovalev (1):
      wifi: ath11k: fix NULL dereference in ath11k_qmi_m3_load()

Srinivas Kandagatla (1):
      ASoC: qcom: audioreach: fix potential null pointer dereference

Thadeu Lima de Souza Cascardo (1):
      media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID

Wang Haoran (1):
      scsi: target: target_core_configfs: Add length check to avoid buffer overflow

Yu Kuai (1):
      blk-mq: fix blk_mq_tags double free while nr_requests grown

From - Fri Oct 17 14:26:30 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.16.11
Date: Mon,  6 Oct 2025 11:56:25 +0200
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I'm announcing the release of the 6.16.11 kernel.

All users of the 6.16 kernel series must upgrade.

The updated 6.16.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.16.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                       |    2 
 block/blk-mq-tag.c                             |    1 
 drivers/media/i2c/tc358743.c                   |    4 -
 drivers/media/pci/b2c2/flexcop-pci.c           |    2 
 drivers/media/platform/qcom/iris/iris_buffer.c |   10 +++
 drivers/media/platform/st/stm32/stm32-csi.c    |    4 -
 drivers/media/rc/imon.c                        |   27 ++++++---
 drivers/media/tuners/xc5000.c                  |    2 
 drivers/media/usb/uvc/uvc_driver.c             |   73 +++++++++++++++----------
 drivers/media/usb/uvc/uvcvideo.h               |    2 
 drivers/net/wireless/ath/ath11k/qmi.c          |    2 
 drivers/target/target_core_configfs.c          |    2 
 mm/swapfile.c                                  |    3 +
 scripts/gcc-plugins/gcc-common.h               |    7 ++
 sound/soc/qcom/qdsp6/topology.c                |    4 -
 sound/usb/midi.c                               |    9 +--
 16 files changed, 104 insertions(+), 50 deletions(-)

Chandra Mohan Sundar (1):
      media: stm32-csi: Fix dereference before NULL check

Charan Teja Kalla (1):
      mm: swap: check for stable address space before operating on the VMA

Dikshita Agarwal (1):
      media: iris: Fix memory leak by freeing untracked persist buffer

Duoming Zhou (3):
      media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove
      media: i2c: tc358743: Fix use-after-free bugs caused by orphan timer in probe
      media: tuner: xc5000: Fix use-after-free in xc5000_release

Greg Kroah-Hartman (1):
      Linux 6.16.11

Jeongjun Park (1):
      ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free

Kees Cook (1):
      gcc-plugins: Remove TODO_verify_il for GCC >= 16

Larshin Sergey (1):
      media: rc: fix races with imon_disconnect()

Matvey Kovalev (1):
      wifi: ath11k: fix NULL dereference in ath11k_qmi_m3_load()

Srinivas Kandagatla (1):
      ASoC: qcom: audioreach: fix potential null pointer dereference

Thadeu Lima de Souza Cascardo (1):
      media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID

Wang Haoran (1):
      scsi: target: target_core_configfs: Add length check to avoid buffer overflow

Yu Kuai (1):
      blk-mq: fix blk_mq_tags double free while nr_requests grown

From - Fri Oct 17 14:26:30 2025
Delivery-date: Mon, 06 Oct 2025 09:57:57 +0000
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Re: Linux 6.16.11
Date: Mon,  6 Oct 2025 11:56:26 +0200
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SpamTally: Final spam score: -22

diff --git a/Makefile b/Makefile
index 19856af4819a..0d1e19ef28b9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 16
-SUBLEVEL = 10
+SUBLEVEL = 11
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index d880c50629d6..5cffa5668d0c 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -622,6 +622,7 @@ int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
 			return -ENOMEM;
 
 		blk_mq_free_map_and_rqs(set, *tagsptr, hctx->queue_num);
+		hctx->queue->elevator->et->tags[hctx->queue_num] = new;
 		*tagsptr = new;
 	} else {
 		/*
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index 1c7546d2ada4..87130ccd2fbe 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -2225,10 +2225,10 @@ static int tc358743_probe(struct i2c_client *client)
 err_work_queues:
 	cec_unregister_adapter(state->cec_adap);
 	if (!state->i2c_client->irq) {
-		timer_delete(&state->timer);
+		timer_delete_sync(&state->timer);
 		flush_work(&state->work_i2c_poll);
 	}
-	cancel_delayed_work(&state->delayed_work_enable_hotplug);
+	cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
 	mutex_destroy(&state->confctl_mutex);
 err_hdl:
 	media_entity_cleanup(&sd->entity);
diff --git a/drivers/media/pci/b2c2/flexcop-pci.c b/drivers/media/pci/b2c2/flexcop-pci.c
index 486c8ec0fa60..ab53c5b02c48 100644
--- a/drivers/media/pci/b2c2/flexcop-pci.c
+++ b/drivers/media/pci/b2c2/flexcop-pci.c
@@ -411,7 +411,7 @@ static void flexcop_pci_remove(struct pci_dev *pdev)
 	struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
 
 	if (irq_chk_intv > 0)
-		cancel_delayed_work(&fc_pci->irq_check_work);
+		cancel_delayed_work_sync(&fc_pci->irq_check_work);
 
 	flexcop_pci_dma_exit(fc_pci);
 	flexcop_device_exit(fc_pci->fc_dev);
diff --git a/drivers/media/platform/qcom/iris/iris_buffer.c b/drivers/media/platform/qcom/iris/iris_buffer.c
index 018334512bae..5e6c34c6b080 100644
--- a/drivers/media/platform/qcom/iris/iris_buffer.c
+++ b/drivers/media/platform/qcom/iris/iris_buffer.c
@@ -410,6 +410,16 @@ static int iris_destroy_internal_buffers(struct iris_inst *inst, u32 plane, bool
 		}
 	}
 
+	if (force) {
+		buffers = &inst->buffers[BUF_PERSIST];
+
+		list_for_each_entry_safe(buf, next, &buffers->list, list) {
+			ret = iris_destroy_internal_buffer(inst, buf);
+			if (ret)
+				return ret;
+		}
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index b69048144cc1..fd2b6dfbd44c 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -443,8 +443,7 @@ static void stm32_csi_phy_reg_write(struct stm32_csi_dev *csidev,
 static int stm32_csi_start(struct stm32_csi_dev *csidev,
 			   struct v4l2_subdev_state *state)
 {
-	struct media_pad *src_pad =
-		&csidev->s_subdev->entity.pads[csidev->s_subdev_pad_nb];
+	struct media_pad *src_pad;
 	const struct stm32_csi_mbps_phy_reg *phy_regs = NULL;
 	struct v4l2_mbus_framefmt *sink_fmt;
 	const struct stm32_csi_fmts *fmt;
@@ -466,6 +465,7 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 	if (!csidev->s_subdev)
 		return -EIO;
 
+	src_pad = &csidev->s_subdev->entity.pads[csidev->s_subdev_pad_nb];
 	link_freq = v4l2_get_link_freq(src_pad,
 				       fmt->bpp, 2 * csidev->num_lanes);
 	if (link_freq < 0)
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index f5221b018808..cf3e6e43c0c7 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -536,7 +536,9 @@ static int display_open(struct inode *inode, struct file *file)
 
 	mutex_lock(&ictx->lock);
 
-	if (!ictx->display_supported) {
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+	} else if (!ictx->display_supported) {
 		pr_err("display not supported by device\n");
 		retval = -ENODEV;
 	} else if (ictx->display_isopen) {
@@ -598,6 +600,9 @@ static int send_packet(struct imon_context *ictx)
 	int retval = 0;
 	struct usb_ctrlrequest *control_req = NULL;
 
+	if (ictx->disconnected)
+		return -ENODEV;
+
 	/* Check if we need to use control or interrupt urb */
 	if (!ictx->tx_control) {
 		pipe = usb_sndintpipe(ictx->usbdev_intf0,
@@ -949,12 +954,14 @@ static ssize_t vfd_write(struct file *file, const char __user *buf,
 	static const unsigned char vfd_packet6[] = {
 		0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	if (mutex_lock_interruptible(&ictx->lock))
 		return -ERESTARTSYS;
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->dev_present_intf0) {
 		pr_err_ratelimited("no iMON device present\n");
 		retval = -ENODEV;
@@ -1029,11 +1036,13 @@ static ssize_t lcd_write(struct file *file, const char __user *buf,
 	int retval = 0;
 	struct imon_context *ictx = file->private_data;
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	mutex_lock(&ictx->lock);
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->display_supported) {
 		pr_err_ratelimited("no iMON display present\n");
 		retval = -ENODEV;
@@ -2499,7 +2508,11 @@ static void imon_disconnect(struct usb_interface *interface)
 	int ifnum;
 
 	ictx = usb_get_intfdata(interface);
+
+	mutex_lock(&ictx->lock);
 	ictx->disconnected = true;
+	mutex_unlock(&ictx->lock);
+
 	dev = ictx->dev;
 	ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
 
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 30aa4ee958bd..ec9a3cd4784e 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -1304,7 +1304,7 @@ static void xc5000_release(struct dvb_frontend *fe)
 	mutex_lock(&xc5000_list_mutex);
 
 	if (priv) {
-		cancel_delayed_work(&priv->timer_sleep);
+		cancel_delayed_work_sync(&priv->timer_sleep);
 		hybrid_tuner_release_state(priv);
 	}
 
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 5c7bf142fb21..56a77a05efc1 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -137,6 +137,9 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
 {
 	struct uvc_entity *entity;
 
+	if (id == UVC_INVALID_ENTITY_ID)
+		return NULL;
+
 	list_for_each_entry(entity, &dev->entities, list) {
 		if (entity->id == id)
 			return entity;
@@ -795,14 +798,27 @@ static const u8 uvc_media_transport_input_guid[16] =
 	UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
 static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
 
-static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
-		unsigned int num_pads, unsigned int extra_size)
+static struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type,
+					       u16 id, unsigned int num_pads,
+					       unsigned int extra_size)
 {
 	struct uvc_entity *entity;
 	unsigned int num_inputs;
 	unsigned int size;
 	unsigned int i;
 
+	/* Per UVC 1.1+ spec 3.7.2, the ID should be non-zero. */
+	if (id == 0) {
+		dev_err(&dev->intf->dev, "Found Unit with invalid ID 0\n");
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
+	/* Per UVC 1.1+ spec 3.7.2, the ID is unique. */
+	if (uvc_entity_by_id(dev, id)) {
+		dev_err(&dev->intf->dev, "Found multiple Units with ID %u\n", id);
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
 	extra_size = roundup(extra_size, sizeof(*entity->pads));
 	if (num_pads)
 		num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
@@ -812,7 +828,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
 	     + num_inputs;
 	entity = kzalloc(size, GFP_KERNEL);
 	if (entity == NULL)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	entity->id = id;
 	entity->type = type;
@@ -924,10 +940,10 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
 			break;
 		}
 
-		unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
-					p + 1, 2*n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, UVC_VC_EXTENSION_UNIT,
+					    buffer[3], p + 1, 2 * n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1036,10 +1052,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
-					1, n + p);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_INPUT,
+					    buffer[3], 1, n + p);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
 			term->camera.bControlSize = n;
@@ -1095,10 +1111,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return 0;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
-					1, 0);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_OUTPUT,
+					    buffer[3], 1, 0);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		memcpy(term->baSourceID, &buffer[7], 1);
 
@@ -1117,9 +1133,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, 0);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[5], p);
 
@@ -1139,9 +1156,9 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], 2, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[4], 1);
 		unit->processing.wMaxMultiplier =
@@ -1168,9 +1185,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1315,9 +1333,10 @@ static int uvc_gpio_parse(struct uvc_device *dev)
 		return dev_err_probe(&dev->intf->dev, irq,
 				     "No IRQ for privacy GPIO\n");
 
-	unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1);
-	if (!unit)
-		return -ENOMEM;
+	unit = uvc_alloc_new_entity(dev, UVC_EXT_GPIO_UNIT,
+				    UVC_EXT_GPIO_UNIT_ID, 0, 1);
+	if (IS_ERR(unit))
+		return PTR_ERR(unit);
 
 	unit->gpio.gpio_privacy = gpio_privacy;
 	unit->gpio.irq = irq;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 11d6e3c2ebdf..63b87c5ff919 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -41,6 +41,8 @@
 #define UVC_EXT_GPIO_UNIT		0x7ffe
 #define UVC_EXT_GPIO_UNIT_ID		0x100
 
+#define UVC_INVALID_ENTITY_ID          0xffff
+
 /* ------------------------------------------------------------------------
  * Driver specific constants.
  */
diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index 2782f4723e41..6a2600054a1f 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2555,7 +2555,7 @@ static int ath11k_qmi_m3_load(struct ath11k_base *ab)
 					   GFP_KERNEL);
 	if (!m3_mem->vaddr) {
 		ath11k_err(ab, "failed to allocate memory for M3 with size %zu\n",
-			   fw->size);
+			   m3_len);
 		ret = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 0904ecae253a..b19acd662726 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -2774,7 +2774,7 @@ static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
 			config_item_name(&dev->dev_group.cg_item));
 		cur_len++; /* Extra byte for NULL terminator */
 
-		if ((cur_len + len) > PAGE_SIZE) {
+		if ((cur_len + len) > PAGE_SIZE || cur_len > LU_GROUP_NAME_BUF) {
 			pr_warn("Ran out of lu_gp_show_attr"
 				"_members buffer\n");
 			break;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4f47ec9118f8..671d17b7b0e8 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2244,6 +2244,8 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 	VMA_ITERATOR(vmi, mm, 0);
 
 	mmap_read_lock(mm);
+	if (check_stable_address_space(mm))
+		goto unlock;
 	for_each_vma(vmi, vma) {
 		if (vma->anon_vma && !is_vm_hugetlb_page(vma)) {
 			ret = unuse_vma(vma, type);
@@ -2253,6 +2255,7 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 
 		cond_resched();
 	}
+unlock:
 	mmap_read_unlock(mm);
 	return ret;
 }
diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
index 6cb6d1051815..8f1b3500f8e2 100644
--- a/scripts/gcc-plugins/gcc-common.h
+++ b/scripts/gcc-plugins/gcc-common.h
@@ -173,10 +173,17 @@ static inline opt_pass *get_pass_for_id(int id)
 	return g->get_passes()->get_pass_for_id(id);
 }
 
+#if BUILDING_GCC_VERSION < 16000
 #define TODO_verify_ssa TODO_verify_il
 #define TODO_verify_flow TODO_verify_il
 #define TODO_verify_stmts TODO_verify_il
 #define TODO_verify_rtl_sharing TODO_verify_il
+#else
+#define TODO_verify_ssa 0
+#define TODO_verify_flow 0
+#define TODO_verify_stmts 0
+#define TODO_verify_rtl_sharing 0
+#endif
 
 #define INSN_DELETED_P(insn) (insn)->deleted()
 
diff --git a/sound/soc/qcom/qdsp6/topology.c b/sound/soc/qcom/qdsp6/topology.c
index 83319a928f29..01bb1bdee5ce 100644
--- a/sound/soc/qcom/qdsp6/topology.c
+++ b/sound/soc/qcom/qdsp6/topology.c
@@ -587,8 +587,8 @@ static int audioreach_widget_load_module_common(struct snd_soc_component *compon
 		return PTR_ERR(cont);
 
 	mod = audioreach_parse_common_tokens(apm, cont, &tplg_w->priv, w);
-	if (IS_ERR(mod))
-		return PTR_ERR(mod);
+	if (IS_ERR_OR_NULL(mod))
+		return mod ? PTR_ERR(mod) : -ENODEV;
 
 	dobj = &w->dobj;
 	dobj->private = mod;
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index 866e613fee4f..bcfdb75e5757 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -1522,15 +1522,14 @@ static void snd_usbmidi_free(struct snd_usb_midi *umidi)
 {
 	int i;
 
+	if (!umidi->disconnected)
+		snd_usbmidi_disconnect(&umidi->list);
+
 	for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
 		struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
-		if (ep->out)
-			snd_usbmidi_out_endpoint_delete(ep->out);
-		if (ep->in)
-			snd_usbmidi_in_endpoint_delete(ep->in);
+		kfree(ep->out);
 	}
 	mutex_destroy(&umidi->mutex);
-	timer_shutdown_sync(&umidi->error_timer);
 	kfree(umidi);
 }

From - Fri Oct 17 14:26:30 2025
Delivery-date: Mon, 06 Oct 2025 09:56:34 +0000
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.12.51
Date: Mon,  6 Oct 2025 11:56:17 +0200
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                             [147.75.80.249 listed in list.dnswl.org]
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I'm announcing the release of the 6.12.51 kernel.

All users of the 6.12 kernel series must upgrade.

The updated 6.12.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.12.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                              |    2 
 drivers/media/pci/b2c2/flexcop-pci.c  |    2 
 drivers/media/rc/imon.c               |   27 +++++++++---
 drivers/media/tuners/xc5000.c         |    2 
 drivers/media/usb/uvc/uvc_driver.c    |   73 +++++++++++++++++++++-------------
 drivers/media/usb/uvc/uvcvideo.h      |    2 
 drivers/net/wireless/ath/ath11k/qmi.c |    2 
 drivers/target/target_core_configfs.c |    2 
 include/crypto/sha256_base.h          |    2 
 mm/swapfile.c                         |    3 +
 scripts/gcc-plugins/gcc-common.h      |    7 +++
 sound/soc/qcom/qdsp6/topology.c       |    4 -
 12 files changed, 86 insertions(+), 42 deletions(-)

Breno Leitao (1):
      crypto: sha256 - fix crash at kexec

Charan Teja Kalla (1):
      mm: swap: check for stable address space before operating on the VMA

Duoming Zhou (2):
      media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove
      media: tuner: xc5000: Fix use-after-free in xc5000_release

Greg Kroah-Hartman (1):
      Linux 6.12.51

Kees Cook (1):
      gcc-plugins: Remove TODO_verify_il for GCC >= 16

Larshin Sergey (1):
      media: rc: fix races with imon_disconnect()

Matvey Kovalev (1):
      wifi: ath11k: fix NULL dereference in ath11k_qmi_m3_load()

Srinivas Kandagatla (1):
      ASoC: qcom: audioreach: fix potential null pointer dereference

Thadeu Lima de Souza Cascardo (1):
      media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID

Wang Haoran (1):
      scsi: target: target_core_configfs: Add length check to avoid buffer overflow

From - Fri Oct 17 14:26:30 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Re: Linux 6.6.110
Date: Mon,  6 Oct 2025 11:56:12 +0200
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                             valid
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                             author's domain
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 -1.0 MAILING_LIST_MULTI     Multiple indicators imply a widely-seen list
                             manager
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SpamTally: Final spam score: 0

diff --git a/Makefile b/Makefile
index afeacf5efc95..196343089737 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 109
+SUBLEVEL = 110
 EXTRAVERSION =
 NAME = Pinguïn Aangedreven
 
diff --git a/drivers/media/pci/b2c2/flexcop-pci.c b/drivers/media/pci/b2c2/flexcop-pci.c
index 486c8ec0fa60..ab53c5b02c48 100644
--- a/drivers/media/pci/b2c2/flexcop-pci.c
+++ b/drivers/media/pci/b2c2/flexcop-pci.c
@@ -411,7 +411,7 @@ static void flexcop_pci_remove(struct pci_dev *pdev)
 	struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
 
 	if (irq_chk_intv > 0)
-		cancel_delayed_work(&fc_pci->irq_check_work);
+		cancel_delayed_work_sync(&fc_pci->irq_check_work);
 
 	flexcop_pci_dma_exit(fc_pci);
 	flexcop_device_exit(fc_pci->fc_dev);
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index e5590a708f1c..f4deca8894e0 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -536,7 +536,9 @@ static int display_open(struct inode *inode, struct file *file)
 
 	mutex_lock(&ictx->lock);
 
-	if (!ictx->display_supported) {
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+	} else if (!ictx->display_supported) {
 		pr_err("display not supported by device\n");
 		retval = -ENODEV;
 	} else if (ictx->display_isopen) {
@@ -598,6 +600,9 @@ static int send_packet(struct imon_context *ictx)
 	int retval = 0;
 	struct usb_ctrlrequest *control_req = NULL;
 
+	if (ictx->disconnected)
+		return -ENODEV;
+
 	/* Check if we need to use control or interrupt urb */
 	if (!ictx->tx_control) {
 		pipe = usb_sndintpipe(ictx->usbdev_intf0,
@@ -949,12 +954,14 @@ static ssize_t vfd_write(struct file *file, const char __user *buf,
 	static const unsigned char vfd_packet6[] = {
 		0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	if (mutex_lock_interruptible(&ictx->lock))
 		return -ERESTARTSYS;
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->dev_present_intf0) {
 		pr_err_ratelimited("no iMON device present\n");
 		retval = -ENODEV;
@@ -1029,11 +1036,13 @@ static ssize_t lcd_write(struct file *file, const char __user *buf,
 	int retval = 0;
 	struct imon_context *ictx = file->private_data;
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	mutex_lock(&ictx->lock);
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->display_supported) {
 		pr_err_ratelimited("no iMON display present\n");
 		retval = -ENODEV;
@@ -2499,7 +2508,11 @@ static void imon_disconnect(struct usb_interface *interface)
 	int ifnum;
 
 	ictx = usb_get_intfdata(interface);
+
+	mutex_lock(&ictx->lock);
 	ictx->disconnected = true;
+	mutex_unlock(&ictx->lock);
+
 	dev = ictx->dev;
 	ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
 
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 09753993068a..c7cee6b18526 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -135,6 +135,9 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
 {
 	struct uvc_entity *entity;
 
+	if (id == UVC_INVALID_ENTITY_ID)
+		return NULL;
+
 	list_for_each_entry(entity, &dev->entities, list) {
 		if (entity->id == id)
 			return entity;
@@ -778,14 +781,27 @@ static const u8 uvc_media_transport_input_guid[16] =
 	UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
 static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
 
-static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
-		unsigned int num_pads, unsigned int extra_size)
+static struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type,
+					       u16 id, unsigned int num_pads,
+					       unsigned int extra_size)
 {
 	struct uvc_entity *entity;
 	unsigned int num_inputs;
 	unsigned int size;
 	unsigned int i;
 
+	/* Per UVC 1.1+ spec 3.7.2, the ID should be non-zero. */
+	if (id == 0) {
+		dev_err(&dev->intf->dev, "Found Unit with invalid ID 0\n");
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
+	/* Per UVC 1.1+ spec 3.7.2, the ID is unique. */
+	if (uvc_entity_by_id(dev, id)) {
+		dev_err(&dev->intf->dev, "Found multiple Units with ID %u\n", id);
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
 	extra_size = roundup(extra_size, sizeof(*entity->pads));
 	if (num_pads)
 		num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
@@ -795,7 +811,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
 	     + num_inputs;
 	entity = kzalloc(size, GFP_KERNEL);
 	if (entity == NULL)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	entity->id = id;
 	entity->type = type;
@@ -907,10 +923,10 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
 			break;
 		}
 
-		unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
-					p + 1, 2*n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, UVC_VC_EXTENSION_UNIT,
+					    buffer[3], p + 1, 2 * n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1019,10 +1035,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
-					1, n + p);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_INPUT,
+					    buffer[3], 1, n + p);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
 			term->camera.bControlSize = n;
@@ -1078,10 +1094,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return 0;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
-					1, 0);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_OUTPUT,
+					    buffer[3], 1, 0);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		memcpy(term->baSourceID, &buffer[7], 1);
 
@@ -1100,9 +1116,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, 0);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[5], p);
 
@@ -1122,9 +1139,9 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], 2, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[4], 1);
 		unit->processing.wMaxMultiplier =
@@ -1151,9 +1168,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1293,9 +1311,10 @@ static int uvc_gpio_parse(struct uvc_device *dev)
 		return dev_err_probe(&dev->intf->dev, irq,
 				     "No IRQ for privacy GPIO\n");
 
-	unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1);
-	if (!unit)
-		return -ENOMEM;
+	unit = uvc_alloc_new_entity(dev, UVC_EXT_GPIO_UNIT,
+				    UVC_EXT_GPIO_UNIT_ID, 0, 1);
+	if (IS_ERR(unit))
+		return PTR_ERR(unit);
 
 	unit->gpio.gpio_privacy = gpio_privacy;
 	unit->gpio.irq = irq;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index e99bfaa62266..cbb5ce963cd0 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -41,6 +41,8 @@
 #define UVC_EXT_GPIO_UNIT		0x7ffe
 #define UVC_EXT_GPIO_UNIT_ID		0x100
 
+#define UVC_INVALID_ENTITY_ID          0xffff
+
 /* ------------------------------------------------------------------------
  * Driver specific constants.
  */
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 9a88774836c9..eddcfd09c05b 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -2738,7 +2738,7 @@ static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
 			config_item_name(&dev->dev_group.cg_item));
 		cur_len++; /* Extra byte for NULL terminator */
 
-		if ((cur_len + len) > PAGE_SIZE) {
+		if ((cur_len + len) > PAGE_SIZE || cur_len > LU_GROUP_NAME_BUF) {
 			pr_warn("Ran out of lu_gp_show_attr"
 				"_members buffer\n");
 			break;
diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
index ab904d82236f..0f5f3a6f79f0 100644
--- a/include/crypto/sha256_base.h
+++ b/include/crypto/sha256_base.h
@@ -44,7 +44,7 @@ static inline int lib_sha256_base_do_update(struct sha256_state *sctx,
 	sctx->count += len;
 
 	if (unlikely((partial + len) >= SHA256_BLOCK_SIZE)) {
-		int blocks;
+		unsigned int blocks;
 
 		if (partial) {
 			int p = SHA256_BLOCK_SIZE - partial;
diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
index 90e83d62adb5..de1e4c927cbc 100644
--- a/scripts/gcc-plugins/gcc-common.h
+++ b/scripts/gcc-plugins/gcc-common.h
@@ -196,10 +196,17 @@ inline bool is_a_helper<const gassign *>::test(const_gimple gs)
 }
 #endif
 
+#if BUILDING_GCC_VERSION < 16000
 #define TODO_verify_ssa TODO_verify_il
 #define TODO_verify_flow TODO_verify_il
 #define TODO_verify_stmts TODO_verify_il
 #define TODO_verify_rtl_sharing TODO_verify_il
+#else
+#define TODO_verify_ssa 0
+#define TODO_verify_flow 0
+#define TODO_verify_stmts 0
+#define TODO_verify_rtl_sharing 0
+#endif
 
 #define INSN_DELETED_P(insn) (insn)->deleted()
 
diff --git a/sound/soc/qcom/qdsp6/topology.c b/sound/soc/qcom/qdsp6/topology.c
index 70572c83e101..d4c3bc85fb35 100644
--- a/sound/soc/qcom/qdsp6/topology.c
+++ b/sound/soc/qcom/qdsp6/topology.c
@@ -586,8 +586,8 @@ static int audioreach_widget_load_module_common(struct snd_soc_component *compon
 		return PTR_ERR(cont);
 
 	mod = audioreach_parse_common_tokens(apm, cont, &tplg_w->priv, w);
-	if (IS_ERR(mod))
-		return PTR_ERR(mod);
+	if (IS_ERR_OR_NULL(mod))
+		return mod ? PTR_ERR(mod) : -ENODEV;
 
 	dobj = &w->dobj;
 	dobj->private = mod;

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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Re: Linux 6.12.51
Date: Mon,  6 Oct 2025 11:56:18 +0200
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diff --git a/Makefile b/Makefile
index 7b0a94828fdb..05b7983b56ed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 12
-SUBLEVEL = 50
+SUBLEVEL = 51
 EXTRAVERSION =
 NAME = Baby Opossum Posse
 
diff --git a/drivers/media/pci/b2c2/flexcop-pci.c b/drivers/media/pci/b2c2/flexcop-pci.c
index 486c8ec0fa60..ab53c5b02c48 100644
--- a/drivers/media/pci/b2c2/flexcop-pci.c
+++ b/drivers/media/pci/b2c2/flexcop-pci.c
@@ -411,7 +411,7 @@ static void flexcop_pci_remove(struct pci_dev *pdev)
 	struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
 
 	if (irq_chk_intv > 0)
-		cancel_delayed_work(&fc_pci->irq_check_work);
+		cancel_delayed_work_sync(&fc_pci->irq_check_work);
 
 	flexcop_pci_dma_exit(fc_pci);
 	flexcop_device_exit(fc_pci->fc_dev);
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c
index 8f1361bcce3a..1e7f80070133 100644
--- a/drivers/media/rc/imon.c
+++ b/drivers/media/rc/imon.c
@@ -536,7 +536,9 @@ static int display_open(struct inode *inode, struct file *file)
 
 	mutex_lock(&ictx->lock);
 
-	if (!ictx->display_supported) {
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+	} else if (!ictx->display_supported) {
 		pr_err("display not supported by device\n");
 		retval = -ENODEV;
 	} else if (ictx->display_isopen) {
@@ -598,6 +600,9 @@ static int send_packet(struct imon_context *ictx)
 	int retval = 0;
 	struct usb_ctrlrequest *control_req = NULL;
 
+	if (ictx->disconnected)
+		return -ENODEV;
+
 	/* Check if we need to use control or interrupt urb */
 	if (!ictx->tx_control) {
 		pipe = usb_sndintpipe(ictx->usbdev_intf0,
@@ -949,12 +954,14 @@ static ssize_t vfd_write(struct file *file, const char __user *buf,
 	static const unsigned char vfd_packet6[] = {
 		0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	if (mutex_lock_interruptible(&ictx->lock))
 		return -ERESTARTSYS;
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->dev_present_intf0) {
 		pr_err_ratelimited("no iMON device present\n");
 		retval = -ENODEV;
@@ -1029,11 +1036,13 @@ static ssize_t lcd_write(struct file *file, const char __user *buf,
 	int retval = 0;
 	struct imon_context *ictx = file->private_data;
 
-	if (ictx->disconnected)
-		return -ENODEV;
-
 	mutex_lock(&ictx->lock);
 
+	if (ictx->disconnected) {
+		retval = -ENODEV;
+		goto exit;
+	}
+
 	if (!ictx->display_supported) {
 		pr_err_ratelimited("no iMON display present\n");
 		retval = -ENODEV;
@@ -2499,7 +2508,11 @@ static void imon_disconnect(struct usb_interface *interface)
 	int ifnum;
 
 	ictx = usb_get_intfdata(interface);
+
+	mutex_lock(&ictx->lock);
 	ictx->disconnected = true;
+	mutex_unlock(&ictx->lock);
+
 	dev = ictx->dev;
 	ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
 
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 30aa4ee958bd..ec9a3cd4784e 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -1304,7 +1304,7 @@ static void xc5000_release(struct dvb_frontend *fe)
 	mutex_lock(&xc5000_list_mutex);
 
 	if (priv) {
-		cancel_delayed_work(&priv->timer_sleep);
+		cancel_delayed_work_sync(&priv->timer_sleep);
 		hybrid_tuner_release_state(priv);
 	}
 
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index fde5cc70bf79..9c2dd64be6d3 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -135,6 +135,9 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
 {
 	struct uvc_entity *entity;
 
+	if (id == UVC_INVALID_ENTITY_ID)
+		return NULL;
+
 	list_for_each_entry(entity, &dev->entities, list) {
 		if (entity->id == id)
 			return entity;
@@ -778,14 +781,27 @@ static const u8 uvc_media_transport_input_guid[16] =
 	UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
 static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
 
-static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
-		unsigned int num_pads, unsigned int extra_size)
+static struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type,
+					       u16 id, unsigned int num_pads,
+					       unsigned int extra_size)
 {
 	struct uvc_entity *entity;
 	unsigned int num_inputs;
 	unsigned int size;
 	unsigned int i;
 
+	/* Per UVC 1.1+ spec 3.7.2, the ID should be non-zero. */
+	if (id == 0) {
+		dev_err(&dev->intf->dev, "Found Unit with invalid ID 0\n");
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
+	/* Per UVC 1.1+ spec 3.7.2, the ID is unique. */
+	if (uvc_entity_by_id(dev, id)) {
+		dev_err(&dev->intf->dev, "Found multiple Units with ID %u\n", id);
+		id = UVC_INVALID_ENTITY_ID;
+	}
+
 	extra_size = roundup(extra_size, sizeof(*entity->pads));
 	if (num_pads)
 		num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
@@ -795,7 +811,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
 	     + num_inputs;
 	entity = kzalloc(size, GFP_KERNEL);
 	if (entity == NULL)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	entity->id = id;
 	entity->type = type;
@@ -907,10 +923,10 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
 			break;
 		}
 
-		unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
-					p + 1, 2*n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, UVC_VC_EXTENSION_UNIT,
+					    buffer[3], p + 1, 2 * n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1019,10 +1035,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
-					1, n + p);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_INPUT,
+					    buffer[3], 1, n + p);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
 			term->camera.bControlSize = n;
@@ -1078,10 +1094,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return 0;
 		}
 
-		term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
-					1, 0);
-		if (term == NULL)
-			return -ENOMEM;
+		term = uvc_alloc_new_entity(dev, type | UVC_TERM_OUTPUT,
+					    buffer[3], 1, 0);
+		if (IS_ERR(term))
+			return PTR_ERR(term);
 
 		memcpy(term->baSourceID, &buffer[7], 1);
 
@@ -1100,9 +1116,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, 0);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[5], p);
 
@@ -1122,9 +1139,9 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], 2, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->baSourceID, &buffer[4], 1);
 		unit->processing.wMaxMultiplier =
@@ -1151,9 +1168,10 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
 			return -EINVAL;
 		}
 
-		unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
-		if (unit == NULL)
-			return -ENOMEM;
+		unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3],
+					    p + 1, n);
+		if (IS_ERR(unit))
+			return PTR_ERR(unit);
 
 		memcpy(unit->guid, &buffer[4], 16);
 		unit->extension.bNumControls = buffer[20];
@@ -1293,9 +1311,10 @@ static int uvc_gpio_parse(struct uvc_device *dev)
 		return dev_err_probe(&dev->intf->dev, irq,
 				     "No IRQ for privacy GPIO\n");
 
-	unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1);
-	if (!unit)
-		return -ENOMEM;
+	unit = uvc_alloc_new_entity(dev, UVC_EXT_GPIO_UNIT,
+				    UVC_EXT_GPIO_UNIT_ID, 0, 1);
+	if (IS_ERR(unit))
+		return PTR_ERR(unit);
 
 	unit->gpio.gpio_privacy = gpio_privacy;
 	unit->gpio.irq = irq;
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 74ac2106f08e..62d6129c88ec 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -41,6 +41,8 @@
 #define UVC_EXT_GPIO_UNIT		0x7ffe
 #define UVC_EXT_GPIO_UNIT_ID		0x100
 
+#define UVC_INVALID_ENTITY_ID          0xffff
+
 /* ------------------------------------------------------------------------
  * Driver specific constants.
  */
diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
index a5555c959dec..3ffb7723b673 100644
--- a/drivers/net/wireless/ath/ath11k/qmi.c
+++ b/drivers/net/wireless/ath/ath11k/qmi.c
@@ -2550,7 +2550,7 @@ static int ath11k_qmi_m3_load(struct ath11k_base *ab)
 					   GFP_KERNEL);
 	if (!m3_mem->vaddr) {
 		ath11k_err(ab, "failed to allocate memory for M3 with size %zu\n",
-			   fw->size);
+			   m3_len);
 		ret = -ENOMEM;
 		goto out;
 	}
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index c40217f44b1b..3188bca17e1b 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -2776,7 +2776,7 @@ static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
 			config_item_name(&dev->dev_group.cg_item));
 		cur_len++; /* Extra byte for NULL terminator */
 
-		if ((cur_len + len) > PAGE_SIZE) {
+		if ((cur_len + len) > PAGE_SIZE || cur_len > LU_GROUP_NAME_BUF) {
 			pr_warn("Ran out of lu_gp_show_attr"
 				"_members buffer\n");
 			break;
diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
index e0418818d63c..e3e610cfe8d3 100644
--- a/include/crypto/sha256_base.h
+++ b/include/crypto/sha256_base.h
@@ -44,7 +44,7 @@ static inline int lib_sha256_base_do_update(struct sha256_state *sctx,
 	sctx->count += len;
 
 	if (unlikely((partial + len) >= SHA256_BLOCK_SIZE)) {
-		int blocks;
+		unsigned int blocks;
 
 		if (partial) {
 			int p = SHA256_BLOCK_SIZE - partial;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index c02493d9c7be..883333a87a45 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2337,6 +2337,8 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 	VMA_ITERATOR(vmi, mm, 0);
 
 	mmap_read_lock(mm);
+	if (check_stable_address_space(mm))
+		goto unlock;
 	for_each_vma(vmi, vma) {
 		if (vma->anon_vma && !is_vm_hugetlb_page(vma)) {
 			ret = unuse_vma(vma, type);
@@ -2346,6 +2348,7 @@ static int unuse_mm(struct mm_struct *mm, unsigned int type)
 
 		cond_resched();
 	}
+unlock:
 	mmap_read_unlock(mm);
 	return ret;
 }
diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
index ef12c8f929ed..70c67061cc44 100644
--- a/scripts/gcc-plugins/gcc-common.h
+++ b/scripts/gcc-plugins/gcc-common.h
@@ -191,10 +191,17 @@ inline bool is_a_helper<const gassign *>::test(const_gimple gs)
 }
 #endif
 
+#if BUILDING_GCC_VERSION < 16000
 #define TODO_verify_ssa TODO_verify_il
 #define TODO_verify_flow TODO_verify_il
 #define TODO_verify_stmts TODO_verify_il
 #define TODO_verify_rtl_sharing TODO_verify_il
+#else
+#define TODO_verify_ssa 0
+#define TODO_verify_flow 0
+#define TODO_verify_stmts 0
+#define TODO_verify_rtl_sharing 0
+#endif
 
 #define INSN_DELETED_P(insn) (insn)->deleted()
 
diff --git a/sound/soc/qcom/qdsp6/topology.c b/sound/soc/qcom/qdsp6/topology.c
index 83319a928f29..01bb1bdee5ce 100644
--- a/sound/soc/qcom/qdsp6/topology.c
+++ b/sound/soc/qcom/qdsp6/topology.c
@@ -587,8 +587,8 @@ static int audioreach_widget_load_module_common(struct snd_soc_component *compon
 		return PTR_ERR(cont);
 
 	mod = audioreach_parse_common_tokens(apm, cont, &tplg_w->priv, w);
-	if (IS_ERR(mod))
-		return PTR_ERR(mod);
+	if (IS_ERR_OR_NULL(mod))
+		return mod ? PTR_ERR(mod) : -ENODEV;
 
 	dobj = &w->dobj;
 	dobj->private = mod;

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From: Alexey Charkov <[email-masked]>
Date: Sun, 5 Oct 2025 14:55:07 +0400
Subject: Re: [PATCH] arm64: dts: rockchip: Fix broken tsadc pinctrl binding
 for rk3588
To: Laurent Pinchart <[email-masked]>
Cc: Dragan Simic <[email-masked]>, Alexander Shiyan <[email-masked]>, 
	Rob Herring <[email-masked]>, Conor Dooley <[email-masked]>, Heiko Stuebner <[email-masked]>, 
	[email-masked], 
	Sebastian Reichel <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], 
	Krzysztof Kozlowski <[email-masked]>, [email-masked]
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On Sun, Oct 5, 2025 at 2:03=E2=80=AFAM Laurent Pinchart
<[email-masked]> wrote:
>
> On Sat, Oct 04, 2025 at 03:41:41PM +0400, Alexey Charkov wrote:
> > On Sat, Oct 4, 2025 at 3:29=E2=80=AFAM Laurent Pinchart wrote:
> > > On Fri, Oct 03, 2025 at 06:55:26PM +0400, Alexey Charkov wrote:
> > > > On Fri, Oct 3, 2025 at 6:13=E2=80=AFPM Alexey Charkov wrote:
> > > > > On Fri, Oct 3, 2025 at 5:33=E2=80=AFPM Laurent Pinchart wrote:
> > > > > > On Fri, Jan 24, 2025 at 11:44:34PM +0400, Alexey Charkov wrote:
> > > > > > > On Fri, Jan 24, 2025 at 9:23=E2=80=AFPM Alexey Charkov wrote:
> > > > > > > > On Fri, Jan 24, 2025 at 2:37=E2=80=AFPM Dragan Simic wrote:
> > > > > > > > > On 2025-01-24 11:25, Alexey Charkov wrote:
> > > > > > > > > > On Fri, Jan 24, 2025 at 2:06=E2=80=AFPM Dragan Simic wr=
ote:
> > > > > > > > > >> On 2025-01-24 09:33, Alexey Charkov wrote:
> > > > > > > > > >> > On Fri, Jan 24, 2025 at 9:26=E2=80=AFAM Alexander Sh=
iyan wrote:
> > > > > > > > > >> >>
> > > > > > > > > >> >> There is no pinctrl "gpio" and "otpout" (probably d=
esigned as
> > > > > > > > > >> >> "output")
> > > > > > > > > >> >> handling in the tsadc driver.
> > > > > > > > > >> >> Let's use proper binding "default" and "sleep".
> > > > > > > > > >> >
> > > > > > > > > >> > This looks reasonable, however I've tried it on my R=
adxa Rock 5C and
> > > > > > > > > >> > the driver still doesn't claim GPIO0 RK_PA1 even wit=
h this change. As
> > > > > > > > > >> > a result, a simulated thermal runaway condition (I'v=
e changed the
> > > > > > > > > >> > tshut temperature to 65000 and tshut mode to 1) does=
n't trigger a PMIC
> > > > > > > > > >> > reset, even though a direct `gpioset 0 1=3D0` does.
> > > > > > > > > >> >
> > > > > > > > > >> > Are any additional changes needed to the driver itse=
lf?
> > > > > > > > > >>
> > > > > > > > > >> I've been digging through this patch the whole TSADC/O=
TP thing in the
> > > > > > > > > >> last couple of hours, and AFAIK some parts of the upst=
ream driver are
> > > > > > > > > >> still missing, in comparison with the downstream drive=
r.
> > > > > > > > > >>
> > > > > > > > > >> I've got some small suggestions for the patch itself, =
but the issue
> > > > > > > > > >> you observed is obviously of higher priority, and I've=
 singled it out
> > > > > > > > > >> as well while digging through the code.
> > > > > > > > > >>
> > > > > > > > > >> Could you, please, try the patch below quickly, to see=
 is it going to
> > > > > > > > > >> fix the issue you observed?  I've got some "IRL stuff"=
 to take care of
> > > > > > > > > >> today, so I can't test it myself, and it would be grea=
t to know is it
> > > > > > > > > >> the right path to the proper fix.
> > > > > > > > > >>
> > > > > > > > > >> diff --git i/drivers/thermal/rockchip_thermal.c
> > > > > > > > > >> w/drivers/thermal/rockchip_thermal.c
> > > > > > > > > >> index f551df48eef9..62f0e14a8d98 100644
> > > > > > > > > >> --- i/drivers/thermal/rockchip_thermal.c
> > > > > > > > > >> +++ w/drivers/thermal/rockchip_thermal.c
> > > > > > > > > >> @@ -1568,6 +1568,11 @@ static int rockchip_thermal_pro=
be(struct
> > > > > > > > > >> platform_device *pdev)
> > > > > > > > > >>          thermal->chip->initialize(thermal->grf, therm=
al->regs,
> > > > > > > > > >>                                    thermal->tshut_pola=
rity);
> > > > > > > > > >>
> > > > > > > > > >> +       if (thermal->tshut_mode =3D=3D TSHUT_MODE_GPIO=
)
> > > > > > > > > >> +               pinctrl_select_default_state(dev);
> > > > > > > > > >> +       else
> > > > > > > > > >> +               pinctrl_select_sleep_state(dev);
> > > > > > > > > >
> > > > > > > > > > I believe no 'else' block is needed here, because if ts=
hut_mode is not
> > > > > > > > > > TSHUT_MODE_GPIO then the TSADC doesn't use this pin at =
all, so there's
> > > > > > > > > > no reason for the driver to mess with its pinctrl state=
. I'd rather
> > > > > > > > > > put a mirroring block to put the pin back to its 'sleep=
' state in the
> > > > > > > > > > removal function for the TSHUT_MODE_GPIO case.
> > > > > > > > >
> > > > > > > > > You're right, but the "else block" is what the downstream=
 driver does,
> > > > > > > >
> > > > > > > > Does it though? It only handles the TSHUT_MODE_GPIO case as=
 far as I
> > > > > > > > can tell (or TSHUT_MODE_OTP in downstream driver lingo) [1]
> > > > > > > >
> > > > > > > > [1] https://github.com/radxa/kernel/blob/edb3eeeaa4643ecac6=
f4185d6d391c574735fca1/drivers/thermal/rockchip_thermal.c#L2564
> > > > > > > >
> > > > > > > > > so I think it's better to simply stay on the safe side an=
d follow that
> > > > > > > > > logic in the upstream driver.  Is it really needed?  Perh=
aps not, but
> > > > > > > > > it also shouldn't hurt.
> > > > > > > > >
> > > > > > > > > > Will try and revert.
> > > > > > > > >
> > > > > > > > > Awesome, thanks!
> > > > > > > > >
> > > > > > > > > > P.S. Just looked at the downstream driver, and it actua=
lly calls
> > > > > > > > > > TSHUT_MODE_GPIO TSHUT_MODE_OTP instead, so it seems tha=
t "otpout" was
> > > > > > > > > > not a typo in the first place. So maybe the right appro=
ach here is not
> > > > > > > > > > to change the device tree but rather fix the "gpio" / "=
otpout" pinctrl
> > > > > > > > > > state handling in the driver.
> > > > > > > > >
> > > > > > > > > Indeed, "otpout" wasn't a typo, and I've already addresse=
d that in my
> > > > > > > > > comments to Alexander's patch.  Will send that response a=
 bit later.
> > > > > > > > >
> > > > > > > > > I think it's actually better to accept the approach in Al=
exander's
> > > > > > > > > patch, because the whole thing applies to other Rockchip =
SoCs as well,
> > > > > > > > > not just to the RK3588(S).
> > > > > > > >
> > > > > > > > Anyway, I've just tried it after including the changes belo=
w, and
> > > > > > > > while /sys/kernel/debug/pinctrl/pinctrl-handles shows the e=
xpected
> > > > > > > > pinctrls under tsadc, the driver still doesn't seem to be t=
riggering a
> > > > > > > > PMIC reset. Weird. Any thoughts welcome.
> > > > > > >
> > > > > > > I found the culprit. "otpout" (or "default" if we follow Alex=
ander's
> > > > > > > suggested approach) pinctrl state should refer to the &tsadc_=
shut_org
> > > > > > > config instead of &tsadc_shut - then the PMIC reset works.
> > > > > >
> > > > > > I've recently brought up an RK3588S-based Orange Pi CM5 Base bo=
ard, made
> > > > > > of a compute module (CM5, see [1]) and a carrier board (Base, s=
ee [2]).
> > > > > > The carrier board has a reset button which pulls the PMIC_RESET=
_L signal
> > > > > > of the CM5 to GND (see page 3 of the schematics in [3]).
> > > > > >
> > > > > > With &tsadc_shut_org the reset button has absolutely no effect.=
 With
> > > > > > &tsadc_shut it resets the board as expected.
> > > > >
> > > > > Interesting. The TSADC shouldn't affect the physical button opera=
tion
> > > > > at all, if it's really wired to the PMIC as the signal name impli=
es.
> > > > > There isn't even any default pull value associated with the TSHUT=
 pin
> > > > > config.
> > > >
> > > > On a second thought, I've got another hypothesis. Your baseboard on=
ly
> > > > pulls the reset line through  a 100 Ohm resistor when the button is
> > > > pressed. So if the TSHUT pin is in its default push-pull mode and
> > > > stays high when no thermal runaway reset is requested, the reset
> > > > button won't pull the line fully to zero, as the TSHUT line pulls i=
t
> > > > high at the same time.
> > >
> > > That's the most likely cause, I agree.
> > >
> > > > If you switch it from &tsadc_shut_org to &tsadc_shut, then it stops
> > > > working properly as the thermal protection reset, and GPIO0_A1 rema=
ins
> > > > high-impendance, thus allowing the reset button to function even
> > > > though its pull is too weak.
> > >
> > > By the way, what is the difference between tsadc_shut_org and tsadc_s=
hut
> > > ? I haven't seen it being clearly documented in the TRM.
> >
> > No idea frankly. Looks like a half-finished design change to me, which
> > left the non-"org" version unconnected internally.
>
> :-/
>
> > > > So maybe change the pin configuration of &tsadc_shut_org in
> > > > rk3588-base-pinctrl.dtsi to open drain and retry?
> > >
> > > That's a good idea, but... how ? The pinctrl-rockchip driver doesn't
> > > seem to support generic open-drain configuration.
> >
> > I thought I saw open-drain configurations here, but after reviewing
> > the TRM, bindings and the driver it turns out I must have been
> > daydreaming :( Sorry.
> >
> > Looks like the best we can try is a lower drive strength while keeping
> > the push-pull mode, but I'm afraid this 100 Ohm pulldown is too weak,
> > because the lowest TSHUT drive strength Rockchip offers is 100 Ohm,
> > while the PMIC would only count anything below 30% reference voltage
> > as logical low. Maybe adding a pulldown to the pin config can help,
> > but most likely this board will require switching the pin to GPIO
> > input for high-z, and switching the TSHUT mode to CRU.
>
> I agree with you, going through the CRU seems the best solution for this
> board. This is actually the default mode in
> arch/arm64/boot/dts/rockchip/rk3588-base.dtsi:
>
>         rockchip,hw-tshut-mode =3D <0>; /* tshut mode 0:CRU 1:GPIO */
>         rockchip,hw-tshut-polarity =3D <0>; /* tshut polarity 0:LOW 1:HIG=
H */
>         pinctrl-0 =3D <&tsadc_shut_org>;
>         pinctrl-1 =3D <&tsadc_gpio_func>;
>
> If hw-tshut-mode defaults to 0, why do we need to setup the GPIO0_A1 pin
> to output the TSADC_SHUT signal ?

I believe the thinking was along the lines of "it can't hurt, so let's
provide a default that's likely to work both for the boards where
TSHUT is routed to the PMIC and those where it's not, with an added
benefit of hogging the pin to prevent anyone from accidentally
triggering it to a low level from user space thus suddenly resetting
the board".

But this case of "TSHUT is routed, but with a deviation from the
reference schematic which makes it impossible to use as designed" was
likely never envisaged.

Technically, there is no reason to switch the pin to tsadc_shut_org
when CRU mode is used, and the boottime default for this pin is
high-impedance.

Heiko, shall we remove the pinctrl properties from the common .dtsi
and move them to board specific .dts for those boards that use
PMIC-assisted thermal resets? Happy to produce a patch to that effect.

Best regards,
Alexey

From - Fri Oct 17 14:26:30 2025
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Date: Sun, 5 Oct 2025 21:29:03 +0300
From: Laurent Pinchart <[email-masked]>
To: Alexey Charkov <[email-masked]>
Cc: Dragan Simic <[email-masked]>,
	Alexander Shiyan <[email-masked]>,
	Rob Herring <[email-masked]>, Conor Dooley <[email-masked]>,
	Heiko Stuebner <[email-masked]>, [email-masked],
	Sebastian Reichel <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked],
	Krzysztof Kozlowski <[email-masked]>,
	[email-masked]
Subject: Re: [PATCH] arm64: dts: rockchip: Fix broken tsadc pinctrl binding
 for rk3588
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On Sun, Oct 05, 2025 at 02:55:07PM +0400, Alexey Charkov wrote:
> On Sun, Oct 5, 2025 at 2:03 AM Laurent Pinchart wrote:
> > On Sat, Oct 04, 2025 at 03:41:41PM +0400, Alexey Charkov wrote:
> > > On Sat, Oct 4, 2025 at 3:29 AM Laurent Pinchart wrote:
> > > > On Fri, Oct 03, 2025 at 06:55:26PM +0400, Alexey Charkov wrote:
> > > > > On Fri, Oct 3, 2025 at 6:13 PM Alexey Charkov wrote:
> > > > > > On Fri, Oct 3, 2025 at 5:33 PM Laurent Pinchart wrote:
> > > > > > > On Fri, Jan 24, 2025 at 11:44:34PM +0400, Alexey Charkov wrote:
> > > > > > > > On Fri, Jan 24, 2025 at 9:23 PM Alexey Charkov wrote:
> > > > > > > > > On Fri, Jan 24, 2025 at 2:37 PM Dragan Simic wrote:
> > > > > > > > > > On 2025-01-24 11:25, Alexey Charkov wrote:
> > > > > > > > > > > On Fri, Jan 24, 2025 at 2:06 PM Dragan Simic wrote:
> > > > > > > > > > >> On 2025-01-24 09:33, Alexey Charkov wrote:
> > > > > > > > > > >> > On Fri, Jan 24, 2025 at 9:26 AM Alexander Shiyan wrote:
> > > > > > > > > > >> >>
> > > > > > > > > > >> >> There is no pinctrl "gpio" and "otpout" (probably designed as
> > > > > > > > > > >> >> "output")
> > > > > > > > > > >> >> handling in the tsadc driver.
> > > > > > > > > > >> >> Let's use proper binding "default" and "sleep".
> > > > > > > > > > >> >
> > > > > > > > > > >> > This looks reasonable, however I've tried it on my Radxa Rock 5C and
> > > > > > > > > > >> > the driver still doesn't claim GPIO0 RK_PA1 even with this change. As
> > > > > > > > > > >> > a result, a simulated thermal runaway condition (I've changed the
> > > > > > > > > > >> > tshut temperature to 65000 and tshut mode to 1) doesn't trigger a PMIC
> > > > > > > > > > >> > reset, even though a direct `gpioset 0 1=0` does.
> > > > > > > > > > >> >
> > > > > > > > > > >> > Are any additional changes needed to the driver itself?
> > > > > > > > > > >>
> > > > > > > > > > >> I've been digging through this patch the whole TSADC/OTP thing in the
> > > > > > > > > > >> last couple of hours, and AFAIK some parts of the upstream driver are
> > > > > > > > > > >> still missing, in comparison with the downstream driver.
> > > > > > > > > > >>
> > > > > > > > > > >> I've got some small suggestions for the patch itself, but the issue
> > > > > > > > > > >> you observed is obviously of higher priority, and I've singled it out
> > > > > > > > > > >> as well while digging through the code.
> > > > > > > > > > >>
> > > > > > > > > > >> Could you, please, try the patch below quickly, to see is it going to
> > > > > > > > > > >> fix the issue you observed?  I've got some "IRL stuff" to take care of
> > > > > > > > > > >> today, so I can't test it myself, and it would be great to know is it
> > > > > > > > > > >> the right path to the proper fix.
> > > > > > > > > > >>
> > > > > > > > > > >> diff --git i/drivers/thermal/rockchip_thermal.c
> > > > > > > > > > >> w/drivers/thermal/rockchip_thermal.c
> > > > > > > > > > >> index f551df48eef9..62f0e14a8d98 100644
> > > > > > > > > > >> --- i/drivers/thermal/rockchip_thermal.c
> > > > > > > > > > >> +++ w/drivers/thermal/rockchip_thermal.c
> > > > > > > > > > >> @@ -1568,6 +1568,11 @@ static int rockchip_thermal_probe(struct
> > > > > > > > > > >> platform_device *pdev)
> > > > > > > > > > >>          thermal->chip->initialize(thermal->grf, thermal->regs,
> > > > > > > > > > >>                                    thermal->tshut_polarity);
> > > > > > > > > > >>
> > > > > > > > > > >> +       if (thermal->tshut_mode == TSHUT_MODE_GPIO)
> > > > > > > > > > >> +               pinctrl_select_default_state(dev);
> > > > > > > > > > >> +       else
> > > > > > > > > > >> +               pinctrl_select_sleep_state(dev);
> > > > > > > > > > >
> > > > > > > > > > > I believe no 'else' block is needed here, because if tshut_mode is not
> > > > > > > > > > > TSHUT_MODE_GPIO then the TSADC doesn't use this pin at all, so there's
> > > > > > > > > > > no reason for the driver to mess with its pinctrl state. I'd rather
> > > > > > > > > > > put a mirroring block to put the pin back to its 'sleep' state in the
> > > > > > > > > > > removal function for the TSHUT_MODE_GPIO case.
> > > > > > > > > >
> > > > > > > > > > You're right, but the "else block" is what the downstream driver does,
> > > > > > > > >
> > > > > > > > > Does it though? It only handles the TSHUT_MODE_GPIO case as far as I
> > > > > > > > > can tell (or TSHUT_MODE_OTP in downstream driver lingo) [1]
> > > > > > > > >
> > > > > > > > > [1] https://github.com/radxa/kernel/blob/edb3eeeaa4643ecac6f4185d6d391c574735fca1/drivers/thermal/rockchip_thermal.c#L2564
> > > > > > > > >
> > > > > > > > > > so I think it's better to simply stay on the safe side and follow that
> > > > > > > > > > logic in the upstream driver.  Is it really needed?  Perhaps not, but
> > > > > > > > > > it also shouldn't hurt.
> > > > > > > > > >
> > > > > > > > > > > Will try and revert.
> > > > > > > > > >
> > > > > > > > > > Awesome, thanks!
> > > > > > > > > >
> > > > > > > > > > > P.S. Just looked at the downstream driver, and it actually calls
> > > > > > > > > > > TSHUT_MODE_GPIO TSHUT_MODE_OTP instead, so it seems that "otpout" was
> > > > > > > > > > > not a typo in the first place. So maybe the right approach here is not
> > > > > > > > > > > to change the device tree but rather fix the "gpio" / "otpout" pinctrl
> > > > > > > > > > > state handling in the driver.
> > > > > > > > > >
> > > > > > > > > > Indeed, "otpout" wasn't a typo, and I've already addressed that in my
> > > > > > > > > > comments to Alexander's patch.  Will send that response a bit later.
> > > > > > > > > >
> > > > > > > > > > I think it's actually better to accept the approach in Alexander's
> > > > > > > > > > patch, because the whole thing applies to other Rockchip SoCs as well,
> > > > > > > > > > not just to the RK3588(S).
> > > > > > > > >
> > > > > > > > > Anyway, I've just tried it after including the changes below, and
> > > > > > > > > while /sys/kernel/debug/pinctrl/pinctrl-handles shows the expected
> > > > > > > > > pinctrls under tsadc, the driver still doesn't seem to be triggering a
> > > > > > > > > PMIC reset. Weird. Any thoughts welcome.
> > > > > > > >
> > > > > > > > I found the culprit. "otpout" (or "default" if we follow Alexander's
> > > > > > > > suggested approach) pinctrl state should refer to the &tsadc_shut_org
> > > > > > > > config instead of &tsadc_shut - then the PMIC reset works.
> > > > > > >
> > > > > > > I've recently brought up an RK3588S-based Orange Pi CM5 Base board, made
> > > > > > > of a compute module (CM5, see [1]) and a carrier board (Base, see [2]).
> > > > > > > The carrier board has a reset button which pulls the PMIC_RESET_L signal
> > > > > > > of the CM5 to GND (see page 3 of the schematics in [3]).
> > > > > > >
> > > > > > > With &tsadc_shut_org the reset button has absolutely no effect. With
> > > > > > > &tsadc_shut it resets the board as expected.
> > > > > >
> > > > > > Interesting. The TSADC shouldn't affect the physical button operation
> > > > > > at all, if it's really wired to the PMIC as the signal name implies.
> > > > > > There isn't even any default pull value associated with the TSHUT pin
> > > > > > config.
> > > > >
> > > > > On a second thought, I've got another hypothesis. Your baseboard only
> > > > > pulls the reset line through  a 100 Ohm resistor when the button is
> > > > > pressed. So if the TSHUT pin is in its default push-pull mode and
> > > > > stays high when no thermal runaway reset is requested, the reset
> > > > > button won't pull the line fully to zero, as the TSHUT line pulls it
> > > > > high at the same time.
> > > >
> > > > That's the most likely cause, I agree.
> > > >
> > > > > If you switch it from &tsadc_shut_org to &tsadc_shut, then it stops
> > > > > working properly as the thermal protection reset, and GPIO0_A1 remains
> > > > > high-impendance, thus allowing the reset button to function even
> > > > > though its pull is too weak.
> > > >
> > > > By the way, what is the difference between tsadc_shut_org and tsadc_shut
> > > > ? I haven't seen it being clearly documented in the TRM.
> > >
> > > No idea frankly. Looks like a half-finished design change to me, which
> > > left the non-"org" version unconnected internally.
> >
> > :-/
> >
> > > > > So maybe change the pin configuration of &tsadc_shut_org in
> > > > > rk3588-base-pinctrl.dtsi to open drain and retry?
> > > >
> > > > That's a good idea, but... how ? The pinctrl-rockchip driver doesn't
> > > > seem to support generic open-drain configuration.
> > >
> > > I thought I saw open-drain configurations here, but after reviewing
> > > the TRM, bindings and the driver it turns out I must have been
> > > daydreaming :( Sorry.
> > >
> > > Looks like the best we can try is a lower drive strength while keeping
> > > the push-pull mode, but I'm afraid this 100 Ohm pulldown is too weak,
> > > because the lowest TSHUT drive strength Rockchip offers is 100 Ohm,
> > > while the PMIC would only count anything below 30% reference voltage
> > > as logical low. Maybe adding a pulldown to the pin config can help,
> > > but most likely this board will require switching the pin to GPIO
> > > input for high-z, and switching the TSHUT mode to CRU.
> >
> > I agree with you, going through the CRU seems the best solution for this
> > board. This is actually the default mode in
> > arch/arm64/boot/dts/rockchip/rk3588-base.dtsi:
> >
> >         rockchip,hw-tshut-mode = <0>; /* tshut mode 0:CRU 1:GPIO */
> >         rockchip,hw-tshut-polarity = <0>; /* tshut polarity 0:LOW 1:HIGH */
> >         pinctrl-0 = <&tsadc_shut_org>;
> >         pinctrl-1 = <&tsadc_gpio_func>;
> >
> > If hw-tshut-mode defaults to 0, why do we need to setup the GPIO0_A1 pin
> > to output the TSADC_SHUT signal ?
> 
> I believe the thinking was along the lines of "it can't hurt, so let's
> provide a default that's likely to work both for the boards where
> TSHUT is routed to the PMIC and those where it's not, with an added
> benefit of hogging the pin to prevent anyone from accidentally
> triggering it to a low level from user space thus suddenly resetting
> the board".
> 
> But this case of "TSHUT is routed, but with a deviation from the
> reference schematic which makes it impossible to use as designed" was
> likely never envisaged.
> 
> Technically, there is no reason to switch the pin to tsadc_shut_org
> when CRU mode is used, and the boottime default for this pin is
> high-impedance.

I tried to trigger an over-temperature condition by setting
rockchip,hw-tshut-temp to 40°C (yes, it's getting cold in Finland). With
pinctrl-0 set to <&tsadc_shut_org>, the system reset when the trip point
was reached, regardless of rockchip,hw-tshut-mode.

With pinctrl-0 set to <&tsadc_gpio_func>, reaching 40°C caused a reset
with rockchip,hw-tshut-mode set to 0 (CRU), and no action occurred when
rockchip,hw-tshut-mode was set to 1 (GPIO).

I've also tested <&tsadc_shut>. It resulted in a reset in CRU mode and
no action in GPIO mode.

> Heiko, shall we remove the pinctrl properties from the common .dtsi
> and move them to board specific .dts for those boards that use
> PMIC-assisted thermal resets? Happy to produce a patch to that effect.

-- 
Regards,

Laurent Pinchart

From - Fri Oct 17 14:26:30 2025
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
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Cc: [email-masked],
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	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.6.110
Date: Mon,  6 Oct 2025 11:56:11 +0200
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I'm announcing the release of the 6.6.110 kernel.

All users of the 6.6 kernel series must upgrade.

The updated 6.6.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.6.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                              |    2 
 drivers/media/pci/b2c2/flexcop-pci.c  |    2 
 drivers/media/rc/imon.c               |   27 +++++++++---
 drivers/media/usb/uvc/uvc_driver.c    |   73 +++++++++++++++++++++-------------
 drivers/media/usb/uvc/uvcvideo.h      |    2 
 drivers/target/target_core_configfs.c |    2 
 include/crypto/sha256_base.h          |    2 
 scripts/gcc-plugins/gcc-common.h      |    7 +++
 sound/soc/qcom/qdsp6/topology.c       |    4 -
 9 files changed, 81 insertions(+), 40 deletions(-)

Breno Leitao (1):
      crypto: sha256 - fix crash at kexec

Duoming Zhou (1):
      media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove

Greg Kroah-Hartman (1):
      Linux 6.6.110

Kees Cook (1):
      gcc-plugins: Remove TODO_verify_il for GCC >= 16

Larshin Sergey (1):
      media: rc: fix races with imon_disconnect()

Srinivas Kandagatla (1):
      ASoC: qcom: audioreach: fix potential null pointer dereference

Thadeu Lima de Souza Cascardo (1):
      media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID

Wang Haoran (1):
      scsi: target: target_core_configfs: Add length check to avoid buffer overflow

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Date: Sat, 4 Oct 2025 23:04:35 +0530
From: Manivannan Sadhasivam <[email-masked]>
To: Robin Murphy <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>, 
	[email-masked], Bjorn Helgaas <[email-masked]>, 
	Joerg Roedel <[email-masked]>, Will Deacon <[email-masked]>, 
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Subject: Re: [PATCH 2/2] iommu/of: Call pci_request_acs() before enumerating
 the Root Port device
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On Wed, Sep 24, 2025 at 08:49:26PM +0100, Robin Murphy wrote:

[...]

> > I don't doubt that the current code doesn't detect presence or use of
> > IOMMU until later.  But that feels like an implementation defect
> > because logically the IOMMU is upstream of any PCI device that uses
> > it, so architecturally I would expect it to be *possible* to detect it
> > before PCI enumeration.
> > 
> > More to the point, it's not at all obvious how to infer that
> > 'iommu-map' in the devicetree means the IOMMU will be used.
> 
> Indeed, I would say the way to go down that route would be to echo what we
> do for "iommus", and defer probing the entire host controller driver until
> the targets of an "iommu-map" are either present or assumed to never be
> appearing. (And of course an ACPI equivalent for that would be tricky...)
> 

Maybe we should just call pci_enable_acs() only when the iommu is detected for
the device? But ofc, this is not possible for non-OF platforms as they tend to
call pci_request_acs() pretty early.

> However, even that isn't necessarily the full solution, as just as it's not
> really appropriate for PCI to force ACS without knowing whether an IOMMU is
> actually present to make it meaningful, it's also not strictly appropriate
> for an IOMMU driver to request ACS globally without knowing that it actually
> serves any relevant PCIe devices. Even in the ideal scenario, I think the
> point of actually knowing is still a bit too late for the current API
> design:
> 
>   pci_device_add
>     pci_init_capabilities
>       pci_acs_init
>         pci_enable_acs
>     device_add
>       iommu_bus_notifier
>         iommu_probe_device
>           //logically, request ACS for dev here
> 
> (at the moment, iommu_probe_device() will actually end up calling into the
> same of_iommu_configure()->pci_request_acs() path, but the plan is still to
> eventually shorten and streamline that.)
> 

What is worrying me is that of_iommu_configure() is called for each PCI device,
as opposed to just one time on other platforms. But I think that's a good thing
to have as the IOMMU driver can have a per-device ACS policy, instead of a
global one.

> I guess we might want to separate the actual ACS enablement from the basic
> capability init, or at least perhaps just call pci_enable_acs() again after
> the IOMMU notifier may have changed the policy?
> 

Is this applicable to other platforms as well? Not just OF?

- Mani

-- 
மணிவண்ணன் சதாசிவம்

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On Fri, Sep 26, 2025 at 4:25=E2=80=AFPM Johan Hovold <[email-masked]> wro=
te:
>
> Make sure to drop the reference taken to the canvas platform device when
> looking up its driver data.
>
> Note that holding a reference to a device does not prevent its driver
> data from going away so there is no point in keeping the reference.
>
> Also note that commit 28f851e6afa8 ("soc: amlogic: canvas: add missing
> put_device() call in meson_canvas_get()") fixed the leak in a lookup
> error path, but the reference is still leaking on success.
>
> Fixes: d4983983d987 ("soc: amlogic: add meson-canvas driver")
> Cc: [email-masked]      # 4.20: 28f851e6afa8
> Cc: Yu Kuai <[email-masked]>
> Signed-off-by: Johan Hovold <[email-masked]>
Reviewed-by: Martin Blumenstingl <[email-masked]>

I haven't used the scope-based resource management myself as pointed
out by Markus.
That said, as far as I understand it's a feature in newer kernels and
this patch may be backported until 5.4 (oldest -stable kernel still
supported).
So let's go with this simple approach from Johan - we can still
improve this (without having to worry about backports).

Best regards,
Martin

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Date: Sun, 5 Oct 2025 01:03:26 +0300
From: Laurent Pinchart <[email-masked]>
To: Alexey Charkov <[email-masked]>
Cc: Dragan Simic <[email-masked]>,
	Alexander Shiyan <[email-masked]>,
	Rob Herring <[email-masked]>, Conor Dooley <[email-masked]>,
	Heiko Stuebner <[email-masked]>, [email-masked],
	Sebastian Reichel <[email-masked]>,
	[email-masked], [email-masked],
	[email-masked],
	Krzysztof Kozlowski <[email-masked]>,
	[email-masked]
Subject: Re: [PATCH] arm64: dts: rockchip: Fix broken tsadc pinctrl binding
 for rk3588
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On Sat, Oct 04, 2025 at 03:41:41PM +0400, Alexey Charkov wrote:
> On Sat, Oct 4, 2025 at 3:29 AM Laurent Pinchart wrote:
> > On Fri, Oct 03, 2025 at 06:55:26PM +0400, Alexey Charkov wrote:
> > > On Fri, Oct 3, 2025 at 6:13 PM Alexey Charkov wrote:
> > > > On Fri, Oct 3, 2025 at 5:33 PM Laurent Pinchart wrote:
> > > > > On Fri, Jan 24, 2025 at 11:44:34PM +0400, Alexey Charkov wrote:
> > > > > > On Fri, Jan 24, 2025 at 9:23 PM Alexey Charkov wrote:
> > > > > > > On Fri, Jan 24, 2025 at 2:37 PM Dragan Simic wrote:
> > > > > > > > On 2025-01-24 11:25, Alexey Charkov wrote:
> > > > > > > > > On Fri, Jan 24, 2025 at 2:06 PM Dragan Simic wrote:
> > > > > > > > >> On 2025-01-24 09:33, Alexey Charkov wrote:
> > > > > > > > >> > On Fri, Jan 24, 2025 at 9:26 AM Alexander Shiyan wrote:
> > > > > > > > >> >>
> > > > > > > > >> >> There is no pinctrl "gpio" and "otpout" (probably designed as
> > > > > > > > >> >> "output")
> > > > > > > > >> >> handling in the tsadc driver.
> > > > > > > > >> >> Let's use proper binding "default" and "sleep".
> > > > > > > > >> >
> > > > > > > > >> > This looks reasonable, however I've tried it on my Radxa Rock 5C and
> > > > > > > > >> > the driver still doesn't claim GPIO0 RK_PA1 even with this change. As
> > > > > > > > >> > a result, a simulated thermal runaway condition (I've changed the
> > > > > > > > >> > tshut temperature to 65000 and tshut mode to 1) doesn't trigger a PMIC
> > > > > > > > >> > reset, even though a direct `gpioset 0 1=0` does.
> > > > > > > > >> >
> > > > > > > > >> > Are any additional changes needed to the driver itself?
> > > > > > > > >>
> > > > > > > > >> I've been digging through this patch the whole TSADC/OTP thing in the
> > > > > > > > >> last couple of hours, and AFAIK some parts of the upstream driver are
> > > > > > > > >> still missing, in comparison with the downstream driver.
> > > > > > > > >>
> > > > > > > > >> I've got some small suggestions for the patch itself, but the issue
> > > > > > > > >> you observed is obviously of higher priority, and I've singled it out
> > > > > > > > >> as well while digging through the code.
> > > > > > > > >>
> > > > > > > > >> Could you, please, try the patch below quickly, to see is it going to
> > > > > > > > >> fix the issue you observed?  I've got some "IRL stuff" to take care of
> > > > > > > > >> today, so I can't test it myself, and it would be great to know is it
> > > > > > > > >> the right path to the proper fix.
> > > > > > > > >>
> > > > > > > > >> diff --git i/drivers/thermal/rockchip_thermal.c
> > > > > > > > >> w/drivers/thermal/rockchip_thermal.c
> > > > > > > > >> index f551df48eef9..62f0e14a8d98 100644
> > > > > > > > >> --- i/drivers/thermal/rockchip_thermal.c
> > > > > > > > >> +++ w/drivers/thermal/rockchip_thermal.c
> > > > > > > > >> @@ -1568,6 +1568,11 @@ static int rockchip_thermal_probe(struct
> > > > > > > > >> platform_device *pdev)
> > > > > > > > >>          thermal->chip->initialize(thermal->grf, thermal->regs,
> > > > > > > > >>                                    thermal->tshut_polarity);
> > > > > > > > >>
> > > > > > > > >> +       if (thermal->tshut_mode == TSHUT_MODE_GPIO)
> > > > > > > > >> +               pinctrl_select_default_state(dev);
> > > > > > > > >> +       else
> > > > > > > > >> +               pinctrl_select_sleep_state(dev);
> > > > > > > > >
> > > > > > > > > I believe no 'else' block is needed here, because if tshut_mode is not
> > > > > > > > > TSHUT_MODE_GPIO then the TSADC doesn't use this pin at all, so there's
> > > > > > > > > no reason for the driver to mess with its pinctrl state. I'd rather
> > > > > > > > > put a mirroring block to put the pin back to its 'sleep' state in the
> > > > > > > > > removal function for the TSHUT_MODE_GPIO case.
> > > > > > > >
> > > > > > > > You're right, but the "else block" is what the downstream driver does,
> > > > > > >
> > > > > > > Does it though? It only handles the TSHUT_MODE_GPIO case as far as I
> > > > > > > can tell (or TSHUT_MODE_OTP in downstream driver lingo) [1]
> > > > > > >
> > > > > > > [1] https://github.com/radxa/kernel/blob/edb3eeeaa4643ecac6f4185d6d391c574735fca1/drivers/thermal/rockchip_thermal.c#L2564
> > > > > > >
> > > > > > > > so I think it's better to simply stay on the safe side and follow that
> > > > > > > > logic in the upstream driver.  Is it really needed?  Perhaps not, but
> > > > > > > > it also shouldn't hurt.
> > > > > > > >
> > > > > > > > > Will try and revert.
> > > > > > > >
> > > > > > > > Awesome, thanks!
> > > > > > > >
> > > > > > > > > P.S. Just looked at the downstream driver, and it actually calls
> > > > > > > > > TSHUT_MODE_GPIO TSHUT_MODE_OTP instead, so it seems that "otpout" was
> > > > > > > > > not a typo in the first place. So maybe the right approach here is not
> > > > > > > > > to change the device tree but rather fix the "gpio" / "otpout" pinctrl
> > > > > > > > > state handling in the driver.
> > > > > > > >
> > > > > > > > Indeed, "otpout" wasn't a typo, and I've already addressed that in my
> > > > > > > > comments to Alexander's patch.  Will send that response a bit later.
> > > > > > > >
> > > > > > > > I think it's actually better to accept the approach in Alexander's
> > > > > > > > patch, because the whole thing applies to other Rockchip SoCs as well,
> > > > > > > > not just to the RK3588(S).
> > > > > > >
> > > > > > > Anyway, I've just tried it after including the changes below, and
> > > > > > > while /sys/kernel/debug/pinctrl/pinctrl-handles shows the expected
> > > > > > > pinctrls under tsadc, the driver still doesn't seem to be triggering a
> > > > > > > PMIC reset. Weird. Any thoughts welcome.
> > > > > >
> > > > > > I found the culprit. "otpout" (or "default" if we follow Alexander's
> > > > > > suggested approach) pinctrl state should refer to the &tsadc_shut_org
> > > > > > config instead of &tsadc_shut - then the PMIC reset works.
> > > > >
> > > > > I've recently brought up an RK3588S-based Orange Pi CM5 Base board, made
> > > > > of a compute module (CM5, see [1]) and a carrier board (Base, see [2]).
> > > > > The carrier board has a reset button which pulls the PMIC_RESET_L signal
> > > > > of the CM5 to GND (see page 3 of the schematics in [3]).
> > > > >
> > > > > With &tsadc_shut_org the reset button has absolutely no effect. With
> > > > > &tsadc_shut it resets the board as expected.
> > > >
> > > > Interesting. The TSADC shouldn't affect the physical button operation
> > > > at all, if it's really wired to the PMIC as the signal name implies.
> > > > There isn't even any default pull value associated with the TSHUT pin
> > > > config.
> > >
> > > On a second thought, I've got another hypothesis. Your baseboard only
> > > pulls the reset line through  a 100 Ohm resistor when the button is
> > > pressed. So if the TSHUT pin is in its default push-pull mode and
> > > stays high when no thermal runaway reset is requested, the reset
> > > button won't pull the line fully to zero, as the TSHUT line pulls it
> > > high at the same time.
> >
> > That's the most likely cause, I agree.
> >
> > > If you switch it from &tsadc_shut_org to &tsadc_shut, then it stops
> > > working properly as the thermal protection reset, and GPIO0_A1 remains
> > > high-impendance, thus allowing the reset button to function even
> > > though its pull is too weak.
> >
> > By the way, what is the difference between tsadc_shut_org and tsadc_shut
> > ? I haven't seen it being clearly documented in the TRM.
> 
> No idea frankly. Looks like a half-finished design change to me, which
> left the non-"org" version unconnected internally.

:-/

> > > So maybe change the pin configuration of &tsadc_shut_org in
> > > rk3588-base-pinctrl.dtsi to open drain and retry?
> >
> > That's a good idea, but... how ? The pinctrl-rockchip driver doesn't
> > seem to support generic open-drain configuration.
> 
> I thought I saw open-drain configurations here, but after reviewing
> the TRM, bindings and the driver it turns out I must have been
> daydreaming :( Sorry.
> 
> Looks like the best we can try is a lower drive strength while keeping
> the push-pull mode, but I'm afraid this 100 Ohm pulldown is too weak,
> because the lowest TSHUT drive strength Rockchip offers is 100 Ohm,
> while the PMIC would only count anything below 30% reference voltage
> as logical low. Maybe adding a pulldown to the pin config can help,
> but most likely this board will require switching the pin to GPIO
> input for high-z, and switching the TSHUT mode to CRU.

I agree with you, going through the CRU seems the best solution for this
board. This is actually the default mode in
arch/arm64/boot/dts/rockchip/rk3588-base.dtsi:

	rockchip,hw-tshut-mode = <0>; /* tshut mode 0:CRU 1:GPIO */
	rockchip,hw-tshut-polarity = <0>; /* tshut polarity 0:LOW 1:HIGH */
	pinctrl-0 = <&tsadc_shut_org>;
	pinctrl-1 = <&tsadc_gpio_func>;

If hw-tshut-mode defaults to 0, why do we need to setup the GPIO0_A1 pin
to output the TSADC_SHUT signal ?

> So how about something like this first:
> 
> &tsadc_shut_org {
>         rockchip,pins = <0 RK_PA1 1 &pcfg_pull_down_drv_level_0>;
> };

I've tested that and it's indeed not enough, the reset button still
doesn't work.

-- 
Regards,

Laurent Pinchart

From - Fri Oct 17 14:26:30 2025
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From: Oleksij Rempel <[email-masked]>
To: Andrew Lunn <[email-masked]>,
	"David S. Miller" <[email-masked]>,
	Eric Dumazet <[email-masked]>,
	Jakub Kicinski <[email-masked]>,
	Paolo Abeni <[email-masked]>
Cc: Oleksij Rempel <[email-masked]>,
	=?UTF-8?q?Hubert=20Wi=C5=9Bniewski?= <[email-masked]>,
	Marek Szyprowski <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked],
	Lukas Wunner <[email-masked]>,
	Russell King <[email-masked]>,
	Xu Yang <[email-masked]>,
	[email-masked]
Subject: [PATCH net v3 1/1] net: usb: asix: hold PM usage ref to avoid PM/MDIO + RTNL deadlock
Date: Sun,  5 Oct 2025 10:12:03 +0200
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Prevent USB runtime PM (autosuspend) for AX88772* in bind.

usbnet enables runtime PM (autosuspend) by default, so disabling it via
the usb_driver flag is ineffective. On AX88772B, autosuspend shows no
measurable power saving with current driver (no link partner, admin
up/down). The ~0.453 W -> ~0.248 W drop on v6.1 comes from phylib powering
the PHY off on admin-down, not from USB autosuspend.

The real hazard is that with runtime PM enabled, ndo_open() (under RTNL)
may synchronously trigger autoresume (usb_autopm_get_interface()) into
asix_resume() while the USB PM lock is held. Resume paths then invoke
phylink/phylib and MDIO, which also expect RTNL, leading to possible
deadlocks or PM lock vs MDIO wake issues.

To avoid this, keep the device runtime-PM active by taking a usage
reference in ax88772_bind() and dropping it in unbind(). A non-zero PM
usage count blocks runtime suspend regardless of userspace policy
(.../power/control - pm_runtime_allow/forbid), making this approach
robust against sysfs overrides.

Holding a runtime-PM usage ref does not affect system-wide suspend;
system sleep/resume callbacks continue to run as before.

Fixes: 4a2c7217cd5a ("net: usb: asix: ax88772: manage PHY PM from MAC")
Reported-by: Hubert Wiśniewski <[email-masked]>
Closes: https://lore.kernel.org/all/[email-masked]
Tested-by: Hubert Wiśniewski <[email-masked]>
Reported-by: Marek Szyprowski <[email-masked]>
Closes: https://lore.kernel.org/all/[email-masked]
Cc: [email-masked]
Signed-off-by: Oleksij Rempel <[email-masked]>
---
changes v3
- update comments and commit message
changes v2:
- Switch from pm_runtime_forbid()/allow() to pm_runtime_get_noresume()/put()
  as suggested by Alan Stern, to block autosuspend robustly.
- Reword commit message to clarify the actual deadlock condition
  (autoresume under RTNL) as pointed out by Oliver Neukum.
- Keep explanation in commit message, shorten in-code comment.

Link to the measurement results:
https://lore.kernel.org/all/[email-masked]/
---
 drivers/net/usb/asix_devices.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
index 792ddda1ad49..85bd5d845409 100644
--- a/drivers/net/usb/asix_devices.c
+++ b/drivers/net/usb/asix_devices.c
@@ -625,6 +625,21 @@ static void ax88772_suspend(struct usbnet *dev)
 		   asix_read_medium_status(dev, 1));
 }
 
+/* Notes on PM callbacks and locking context:
+ *
+ * - asix_suspend()/asix_resume() are invoked for both runtime PM and
+ *   system-wide suspend/resume. For struct usb_driver the ->resume()
+ *   callback does not receive pm_message_t, so the resume type cannot
+ *   be distinguished here.
+ *
+ * - The MAC driver must hold RTNL when calling phylink interfaces such as
+ *   phylink_suspend()/resume(). Those calls will also perform MDIO I/O.
+ *
+ * - Taking RTNL and doing MDIO from a runtime-PM resume callback (while
+ *   the USB PM lock is held) is fragile. Since autosuspend brings no
+ *   measurable power saving here, we block it by holding a PM usage
+ *   reference in ax88772_bind().
+ */
 static int asix_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct usbnet *dev = usb_get_intfdata(intf);
@@ -919,6 +934,13 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 	if (ret)
 		goto initphy_err;
 
+	/* Keep this interface runtime-PM active by taking a usage ref.
+	 * Prevents runtime suspend while bound and avoids resume paths
+	 * that could deadlock (autoresume under RTNL while USB PM lock
+	 * is held, phylink/MDIO wants RTNL).
+	 */
+	pm_runtime_get_noresume(&intf->dev);
+
 	return 0;
 
 initphy_err:
@@ -948,6 +970,8 @@ static void ax88772_unbind(struct usbnet *dev, struct usb_interface *intf)
 	phylink_destroy(priv->phylink);
 	ax88772_mdio_unregister(priv);
 	asix_rx_fixup_common_free(dev->driver_priv);
+	/* Drop the PM usage ref taken in bind() */
+	pm_runtime_put(&intf->dev);
 }
 
 static void ax88178_unbind(struct usbnet *dev, struct usb_interface *intf)
@@ -1600,6 +1624,11 @@ static struct usb_driver asix_driver = {
 	.resume =	asix_resume,
 	.reset_resume =	asix_resume,
 	.disconnect =	usbnet_disconnect,
+	/* usbnet enables autosuspend by default (supports_autosuspend=1).
+	 * We keep runtime-PM active for AX88772* by taking a PM usage
+	 * reference in ax88772_bind() (pm_runtime_get_noresume()) and
+	 * dropping it in unbind(), which effectively blocks autosuspend.
+	 */
 	.supports_autosuspend = 1,
 	.disable_hub_initiated_lpm = 1,
 };
-- 
2.47.3

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From: Naresh Kamboju <[email-masked]>
Date: Sat, 4 Oct 2025 17:23:12 +0530
Subject: Re: [PATCH 6.6 0/7] 6.6.110-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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	[email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked]
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On Fri, 3 Oct 2025 at 21:39, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.6.110 release.
> There are 7 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 05 Oct 2025 16:02:25 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.6.110-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.6.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.6.110-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: c901132c8088afd41cf7eaa3298b62c8cc5874b6
* git describe: v6.6.109-8-gc901132c8088
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.1=
09-8-gc901132c8088

## Test Regressions (compared to v6.6.108-92-g583cf4b0ea80)

## Metric Regressions (compared to v6.6.108-92-g583cf4b0ea80)

## Test Fixes (compared to v6.6.108-92-g583cf4b0ea80)

## Metric Fixes (compared to v6.6.108-92-g583cf4b0ea80)

## Test result summary
total: 121371, pass: 103471, fail: 4150, skip: 13306, xfail: 444

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 129 total, 128 passed, 1 failed
* arm64: 44 total, 40 passed, 4 failed
* i386: 23 total, 23 passed, 0 failed
* mips: 26 total, 25 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 32 total, 31 passed, 1 failed
* riscv: 15 total, 14 passed, 1 failed
* s390: 14 total, 13 passed, 1 failed
* sh: 10 total, 10 passed, 0 failed
* sparc: 7 total, 7 passed, 0 failed
* x86_64: 37 total, 34 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture

--
Linaro LKFT
https://lkft.linaro.org

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From: Naresh Kamboju <[email-masked]>
Date: Sat, 4 Oct 2025 17:35:44 +0530
Subject: Re: [PATCH 6.17 00/15] 6.17.1-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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	Arnd Bergmann <[email-masked]>, Anders Roxell <[email-masked]>, 
	Ben Copeland <[email-masked]>, Joanne Koong <[email-masked]>, 
	"Darrick J. Wong" <[email-masked]>, Miklos Szeredi <[email-masked]>, LTP List <[email-masked]>
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On Fri, 3 Oct 2025 at 21:37, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.17.1 release.
> There are 15 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 05 Oct 2025 16:02:25 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.1-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

LTP syscalls swapon01, swapon02, swapon03, swapoff01 and swapoff02 test failing
on 16K and 64K page arm64 devices and passed with default 4K page size.

These failures are noticed on Linux next and mainline master (v6.17).

This test failed on 16K page size builds and 64K page size builds.
 * CONFIG_ARM64_64K_PAGES=y
 * CONFIG_ARM64_16K_PAGES=y

Test regression: LTP swapon/off 16K and 64K page size LTP
libswap.c:230: TFAIL: swapon() on fuse failed: EINVAL (22)

Reported-by: Linux Kernel Functional Testing <[email-masked]>

Anders, bisected this on the Linux next and found the,
# first bad commit:
  [bd24d2108e9c8459d2c9f3d6d910b0053887df57]
  fuse: fix fuseblk i_blkbits for iomap partial writes

## Test logs
### swapon01

libswap.c:230: TFAIL: swapon() on fuse failed: EINVAL (22)
swapon01.c:39: TINFO: create a swapfile size of 128 megabytes (MB)
swapon01.c:25: TFAIL: tst_syscall(__NR_swapon, SWAP_FILE, 0) failed: EINVAL (22)

Lore link,
- https://lore.kernel.org/all/[email-masked]/

## Build
* kernel: 6.17.1-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git commit: e7da5b86b53db5f0fb8e2a4e0936eab2e6491ec7
* git describe: v6.17-16-ge7da5b86b53d
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.17.y/build/v6.17-16-ge7da5b86b53d

## Test Regressions (compared to v6.17-16-ge7da5b86b53d)
* qemu-arm64, ltp-syscalls
  - swapoff01
  - swapoff02
  - swapon01
  - swapon02
  - swapon03

## Metric Regressions (compared to v6.17-16-ge7da5b86b53d)

## Test Fixes (compared to v6.17-16-ge7da5b86b53d)

## Metric Fixes (compared to v6.17-16-ge7da5b86b53d)

## Test result summary
total: 162823, pass: 136895, fail: 4815, skip: 21113, xfail: 0

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 138 passed, 1 failed
* arm64: 57 total, 51 passed, 6 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 24 passed, 1 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-rust
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

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Date: Sat, 4 Oct 2025 08:52:57 -0700
From: "Darrick J. Wong" <[email-masked]>
To: Naresh Kamboju <[email-masked]>
Cc: Greg Kroah-Hartman <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], Kalesh Singh <[email-masked]>,
	Juan Yescas <[email-masked]>,
	Dan Carpenter <[email-masked]>,
	Arnd Bergmann <[email-masked]>,
	Anders Roxell <[email-masked]>,
	Ben Copeland <[email-masked]>,
	Joanne Koong <[email-masked]>,
	Miklos Szeredi <[email-masked]>, LTP List <[email-masked]>
Subject: Re: [PATCH 6.17 00/15] 6.17.1-rc1 review
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On Sat, Oct 04, 2025 at 05:35:44PM +0530, Naresh Kamboju wrote:
> On Fri, 3 Oct 2025 at 21:37, Greg Kroah-Hartman
> <[email-masked]> wrote:
> >
> > This is the start of the stable review cycle for the 6.17.1 release.
> > There are 15 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Sun, 05 Oct 2025 16:02:25 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> >         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.17.1-rc1.gz
> > or in the git tree and branch at:
> >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.17.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> 
> LTP syscalls swapon01, swapon02, swapon03, swapoff01 and swapoff02 test failing
> on 16K and 64K page arm64 devices and passed with default 4K page size.
> 
> These failures are noticed on Linux next and mainline master (v6.17).
> 
> This test failed on 16K page size builds and 64K page size builds.
>  * CONFIG_ARM64_64K_PAGES=y
>  * CONFIG_ARM64_16K_PAGES=y
> 
> Test regression: LTP swapon/off 16K and 64K page size LTP
> libswap.c:230: TFAIL: swapon() on fuse failed: EINVAL (22)
> 
> Reported-by: Linux Kernel Functional Testing <[email-masked]>
> 
> Anders, bisected this on the Linux next and found the,
> # first bad commit:
>   [bd24d2108e9c8459d2c9f3d6d910b0053887df57]
>   fuse: fix fuseblk i_blkbits for iomap partial writes

[now that this has come up twice I'm replying]

Yikes, you can do swap over FUSE?  Ohhhh, that's why fuse implements
bmap in the aops.

The last I heard from Joanne, the workaround in that bd24d2108 commit
will go away when she lands iomap for read{,ahead} in 6.19.  Not sure
what the solution is in the meantime.

I speculate that the problem here is that the superblock
s_blocksize_bits always gets reset to PAGE_SHIFT even if the fuse server
had set another value, and now there's a mismatch and the swapfile code
rejects?

<shrug> I dunno how much people care about swap over fuse, but it /is/ a
breaking change.

--D

> ## Test logs
> ### swapon01
> 
> libswap.c:230: TFAIL: swapon() on fuse failed: EINVAL (22)
> swapon01.c:39: TINFO: create a swapfile size of 128 megabytes (MB)
> swapon01.c:25: TFAIL: tst_syscall(__NR_swapon, SWAP_FILE, 0) failed: EINVAL (22)
> 
> Lore link,
> - https://lore.kernel.org/all/[email-masked]/
> 
> ## Build
> * kernel: 6.17.1-rc1
> * git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> * git commit: e7da5b86b53db5f0fb8e2a4e0936eab2e6491ec7
> * git describe: v6.17-16-ge7da5b86b53d
> * test details:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.17.y/build/v6.17-16-ge7da5b86b53d
> 
> ## Test Regressions (compared to v6.17-16-ge7da5b86b53d)
> * qemu-arm64, ltp-syscalls
>   - swapoff01
>   - swapoff02
>   - swapon01
>   - swapon02
>   - swapon03
> 
> ## Metric Regressions (compared to v6.17-16-ge7da5b86b53d)
> 
> ## Test Fixes (compared to v6.17-16-ge7da5b86b53d)
> 
> ## Metric Fixes (compared to v6.17-16-ge7da5b86b53d)
> 
> ## Test result summary
> total: 162823, pass: 136895, fail: 4815, skip: 21113, xfail: 0
> 
> ## Build Summary
> * arc: 5 total, 5 passed, 0 failed
> * arm: 139 total, 138 passed, 1 failed
> * arm64: 57 total, 51 passed, 6 failed
> * i386: 18 total, 18 passed, 0 failed
> * mips: 34 total, 33 passed, 1 failed
> * parisc: 4 total, 4 passed, 0 failed
> * powerpc: 40 total, 39 passed, 1 failed
> * riscv: 25 total, 24 passed, 1 failed
> * s390: 22 total, 21 passed, 1 failed
> * sh: 5 total, 5 passed, 0 failed
> * sparc: 4 total, 3 passed, 1 failed
> * x86_64: 49 total, 46 passed, 3 failed
> 
> ## Test suites summary
> * boot
> * commands
> * kselftest-arm64
> * kselftest-breakpoints
> * kselftest-capabilities
> * kselftest-cgroup
> * kselftest-clone3
> * kselftest-core
> * kselftest-cpu-hotplug
> * kselftest-cpufreq
> * kselftest-efivarfs
> * kselftest-exec
> * kselftest-fpu
> * kselftest-ftrace
> * kselftest-futex
> * kselftest-gpio
> * kselftest-intel_pstate
> * kselftest-ipc
> * kselftest-kcmp
> * kselftest-kvm
> * kselftest-livepatch
> * kselftest-membarrier
> * kselftest-memfd
> * kselftest-mincore
> * kselftest-mm
> * kselftest-mqueue
> * kselftest-net
> * kselftest-net-mptcp
> * kselftest-openat2
> * kselftest-ptrace
> * kselftest-rseq
> * kselftest-rtc
> * kselftest-rust
> * kselftest-seccomp
> * kselftest-sigaltstack
> * kselftest-size
> * kselftest-tc-testing
> * kselftest-timers
> * kselftest-tmpfs
> * kselftest-tpm2
> * kselftest-user_events
> * kselftest-vDSO
> * kselftest-x86
> * kunit
> * kvm-unit-tests
> * lava
> * libgpiod
> * libhugetlbfs
> * log-parser-boot
> * log-parser-build-clang
> * log-parser-build-gcc
> * log-parser-test
> * ltp-capability
> * ltp-commands
> * ltp-containers
> * ltp-controllers
> * ltp-cpuhotplug
> * ltp-crypto
> * ltp-cve
> * ltp-dio
> * ltp-fcntl-locktests
> * ltp-fs
> * ltp-fs_bind
> * ltp-fs_perms_simple
> * ltp-hugetlb
> * ltp-math
> * ltp-mm
> * ltp-nptl
> * ltp-pty
> * ltp-sched
> * ltp-smoke
> * ltp-syscalls
> * ltp-tracing
> * perf
> * rcutorture
> * rt-tests-cyclicdeadline
> * rt-tests-pi-stress
> * rt-tests-pmqtest
> * rt-tests-rt-migrate-test
> * rt-tests-signaltest
> 
> --
> Linaro LKFT
> https://lkft.linaro.org

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From: Deepanshu Kartikey <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
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Subject: Re: [PATCH v2] comedi: fix divide-by-zero in comedi_buf_munge()
Date: Sat,  4 Oct 2025 06:45:22 +0530
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Hello Ian and maintainers,

Just a gentle ping on this patch. It's been 10 days since v2 was sent
incorporating Ian's feedback to merge the chanlist_len check with the 
existing early return.

Please let me know if any further changes are needed.

Thank you,
Deepanshu

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Date: Sat, 4 Oct 2025 07:46:24 +0200
From: Greg KH <[email-masked]>
To: Deepanshu Kartikey <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH v2] comedi: fix divide-by-zero in comedi_buf_munge()
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On Sat, Oct 04, 2025 at 06:45:22AM +0530, Deepanshu Kartikey wrote:
> 
> Hello Ian and maintainers,
> 
> Just a gentle ping on this patch. It's been 10 days since v2 was sent
> incorporating Ian's feedback to merge the chanlist_len check with the 
> existing early return.
> 
> Please let me know if any further changes are needed.

It's the middle of the merge window, I will get to these pending patches
when it ends in a week.

thanks,

greg k-h

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From: Naresh Kamboju <[email-masked]>
Date: Sat, 4 Oct 2025 17:19:18 +0530
Subject: Re: [PATCH 6.16 00/14] 6.16.11-rc1 review
To: Greg Kroah-Hartman <[email-masked]>
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	[email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], 
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On Fri, 3 Oct 2025 at 21:38, Greg Kroah-Hartman
<[email-masked]> wrote:
>
> This is the start of the stable review cycle for the 6.16.11 release.
> There are 14 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 05 Oct 2025 16:02:25 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-=
6.16.11-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-6.16.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro=E2=80=99s test farm.
No regressions on arm64, arm, x86_64, and i386.

Tested-by: Linux Kernel Functional Testing <[email-masked]>

## Build
* kernel: 6.16.11-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-=
rc.git
* git commit: 13cc90c947b1412899e3166281ce75d1bf1ae157
* git describe: v6.16.10-15-g13cc90c947b1
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.16.y/build/v6.16=
.10-15-g13cc90c947b1

## Test Regressions (compared to v6.16.9-144-ge1acc616e91a)

## Metric Regressions (compared to v6.16.9-144-ge1acc616e91a)

## Test Fixes (compared to v6.16.9-144-ge1acc616e91a)

## Metric Fixes (compared to v6.16.9-144-ge1acc616e91a)

## Test result summary
total: 160076, pass: 136235, fail: 4547, skip: 19294, xfail: 0

## Build Summary
* arc: 5 total, 5 passed, 0 failed
* arm: 139 total, 137 passed, 2 failed
* arm64: 57 total, 51 passed, 6 failed
* i386: 18 total, 18 passed, 0 failed
* mips: 34 total, 33 passed, 1 failed
* parisc: 4 total, 4 passed, 0 failed
* powerpc: 40 total, 39 passed, 1 failed
* riscv: 25 total, 24 passed, 1 failed
* s390: 22 total, 21 passed, 1 failed
* sh: 5 total, 5 passed, 0 failed
* sparc: 4 total, 3 passed, 1 failed
* x86_64: 49 total, 46 passed, 3 failed

## Test suites summary
* boot
* commands
* kselftest-arm64
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-exec
* kselftest-fpu
* kselftest-ftrace
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-kcmp
* kselftest-kvm
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-mincore
* kselftest-mm
* kselftest-mqueue
* kselftest-net
* kselftest-net-mptcp
* kselftest-openat2
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-rust
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-tc-testing
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user_events
* kselftest-vDSO
* kselftest-x86
* kunit
* kvm-unit-tests
* lava
* libgpiod
* libhugetlbfs
* log-parser-boot
* log-parser-build-clang
* log-parser-build-gcc
* log-parser-test
* ltp-capability
* ltp-commands
* ltp-containers
* ltp-controllers
* ltp-cpuhotplug
* ltp-crypto
* ltp-cve
* ltp-dio
* ltp-fcntl-locktests
* ltp-fs
* ltp-fs_bind
* ltp-fs_perms_simple
* ltp-hugetlb
* ltp-math
* ltp-mm
* ltp-nptl
* ltp-pty
* ltp-sched
* ltp-smoke
* ltp-syscalls
* ltp-tracing
* perf
* rcutorture
* rt-tests-cyclicdeadline
* rt-tests-pi-stress
* rt-tests-pmqtest
* rt-tests-rt-migrate-test
* rt-tests-signaltest

--
Linaro LKFT
https://lkft.linaro.org

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Date: Fri, 3 Oct 2025 23:07:02 +0100
From: Conor Dooley <[email-masked]>
To: Miguel Ojeda <[email-masked]>
Cc: [email-masked], Conor Dooley <[email-masked]>,
	[email-masked], Paul Walmsley <[email-masked]>,
	Palmer Dabbelt <[email-masked]>,
	Alexandre Ghiti <[email-masked]>, Miguel Ojeda <[email-masked]>,
	Alex Gaynor <[email-masked]>,
	Boqun Feng <[email-masked]>, Gary Guo <[email-masked]>,
	=?iso-8859-1?Q?Bj=F6rn?= Roy Baron <[email-masked]>,
	Benno Lossin <[email-masked]>,
	Andreas Hindborg <[email-masked]>,
	Alice Ryhl <[email-masked]>, Trevor Gross <[email-masked]>,
	Danilo Krummrich <[email-masked]>, Kees Cook <[email-masked]>,
	Sami Tolvanen <[email-masked]>,
	Matthew Maurer <[email-masked]>,
	"Peter Zijlstra (Intel)" <[email-masked]>,
	[email-masked], [email-masked]
Subject: Re: [PATCH v1] rust: cfi: only 64-bit arm and x86 support CFI_CLANG
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--3LGMo/RvwtuM22VG
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On Mon, Sep 08, 2025 at 04:36:09PM +0200, Miguel Ojeda wrote:
> On Mon, Sep 8, 2025 at 3:13=E2=80=AFPM Conor Dooley <[email-masked]> wr=
ote:
> >
> > From: Conor Dooley <[email-masked]>
> >
> > The kernel uses the standard rustc targets for non-x86 targets, and out
> > of those only 64-bit arm's target has kcfi support enabled. For x86, the
> > custom 64-bit target enables kcfi.
> >
> > The HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC config option that allows
> > CFI_CLANG to be used in combination with RUST does not check whether the
> > rustc target supports kcfi. This breaks the build on riscv (and
> > presumably 32-bit arm) when CFI_CLANG and RUST are enabled at the same
> > time.
> >
> > Ordinarily, a rustc-option check would be used to detect target support
> > but unfortunately rustc-option filters out the target for reasons given
> > in commit 46e24a545cdb4 ("rust: kasan/kbuild: fix missing flags on first
> > build"). As a result, if the host supports kcfi but the target does not,
> > e.g. when building for riscv on x86_64, the build would remain broken.
> >
> > Instead, make HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC depend on the only
> > two architectures where the target used supports it to fix the build.
> >
> > CC: [email-masked]
> > Fixes: ca627e636551e ("rust: cfi: add support for CFI_CLANG with Rust")
> > Signed-off-by: Conor Dooley <[email-masked]>
>=20
> If you are taking this through RISC-V:
>=20
> Acked-by: Miguel Ojeda <[email-masked]>

Hopefully someone can take it! I was hoping it'd be 6.18 material, can
someone grab it for fixes please?

--3LGMo/RvwtuM22VG
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--3LGMo/RvwtuM22VG--

From - Fri Oct 17 14:26:30 2025
Delivery-date: Fri, 03 Oct 2025 22:41:15 +0000
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From: Brian Norris <[email-masked]>
To: Bjorn Helgaas <[email-masked]>
Cc: Mika Westerberg <[email-masked]>,
	"Rafael J . Wysocki" <[email-masked]>,
	[email-masked],
	[email-masked],
	Brian Norris <[email-masked]>,
	[email-masked],
	Brian Norris <[email-masked]>
Subject: [PATCH] PCI/PM: Avoid redundant delays on D3hot->D3cold
Date: Fri,  3 Oct 2025 15:40:09 -0700
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From: Brian Norris <[email-masked]>

When transitioning to D3cold, __pci_set_power_state() will first
transition a device to D3hot. If the device was already in D3hot, this
will add excess work:
(a) read/modify/write PMCSR; and
(b) excess delay (pci_dev_d3_sleep()).

For (b), we already performed the necessary delay on the previous D3hot
entry; this was extra noticeable when evaluating runtime PM transition
latency.

Check whether we're already in the target state before continuing.

Note that __pci_set_power_state() already does this same check for other
state transitions, but D3cold is special because __pci_set_power_state()
converts it to D3hot for the purposes of PMCSR.

This seems to be an oversight in commit 0aacdc957401 ("PCI/PM: Clean up
pci_set_low_power_state()").

Fixes: 0aacdc957401 ("PCI/PM: Clean up pci_set_low_power_state()")
Cc: <[email-masked]>
Signed-off-by: Brian Norris <[email-masked]>
Signed-off-by: Brian Norris <[email-masked]>
---

 drivers/pci/pci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index b0f4d98036cd..7517f1380201 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1539,6 +1539,9 @@ static int pci_set_low_power_state(struct pci_dev *dev, pci_power_t state, bool
 	   || (state == PCI_D2 && !dev->d2_support))
 		return -EIO;
 
+	if (state == dev->current_state)
+		return 0;
+
 	pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
 	if (PCI_POSSIBLE_ERROR(pmcsr)) {
 		pci_err(dev, "Unable to change power state from %s to %s, device inaccessible\n",
-- 
2.51.0.618.g983fd99d29-goog

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Date: Fri, 3 Oct 2025 16:57:22 -0600 (MDT)
From: Paul Walmsley <[email-masked]>
To: Conor Dooley <[email-masked]>
cc: Miguel Ojeda <[email-masked]>, 
    [email-masked], Conor Dooley <[email-masked]>, 
    [email-masked], Paul Walmsley <[email-masked]>, 
    Palmer Dabbelt <[email-masked]>, Alexandre Ghiti <[email-masked]>, 
    Miguel Ojeda <[email-masked]>, Alex Gaynor <[email-masked]>, 
    Boqun Feng <[email-masked]>, Gary Guo <[email-masked]>, 
    =?ISO-8859-15?Q?Bj=F6rn_Roy_Baron?= <[email-masked]>, 
    Benno Lossin <[email-masked]>, Andreas Hindborg <[email-masked]>, 
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    Danilo Krummrich <[email-masked]>, Kees Cook <[email-masked]>, 
    Sami Tolvanen <[email-masked]>, 
    Matthew Maurer <[email-masked]>, 
    "Peter Zijlstra (Intel)" <[email-masked]>, 
    [email-masked], [email-masked]
Subject: Re: [PATCH v1] rust: cfi: only 64-bit arm and x86 support
 CFI_CLANG
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--8323329-567175886-1759532248=:870847
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On Fri, 3 Oct 2025, Conor Dooley wrote:

> On Mon, Sep 08, 2025 at 04:36:09PM +0200, Miguel Ojeda wrote:
> > On Mon, Sep 8, 2025 at 3:13 PM Conor Dooley <[email-masked]> wrote:
> > >
> > > From: Conor Dooley <[email-masked]>
> > >
> > > The kernel uses the standard rustc targets for non-x86 targets, and out
> > > of those only 64-bit arm's target has kcfi support enabled. For x86, the
> > > custom 64-bit target enables kcfi.
> 
> Hopefully someone can take it! I was hoping it'd be 6.18 material, can
> someone grab it for fixes please?

Will pick it up for early v6.18-rc fixes, thanks.

- Paul
--8323329-567175886-1759532248=:870847--

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--------------96EDbU6sWthWZt04r9Luv1Sz
Content-Type: multipart/mixed; boundary="------------Azm0zU53o60pvhlQNB5qML1T";
 protected-headers="v1"
From: Jacob Keller <[email-masked]>
To: Jakub Kicinski <[email-masked]>
Cc: Przemek Kitszel <[email-masked]>,
 Andrew Lunn <[email-masked]>, "David S. Miller"
 <[email-masked]>, Eric Dumazet <[email-masked]>,
 Paolo Abeni <[email-masked]>, Emil Tantilov <[email-masked]>,
 Pavan Kumar Linga <[email-masked]>,
 Alexander Lobakin <[email-masked]>,
 Willem de Bruijn <[email-masked]>,
 Sridhar Samudrala <[email-masked]>,
 Phani Burra <[email-masked]>,
 Piotr Kwapulinski <[email-masked]>,
 Simon Horman <[email-masked]>, Radoslaw Tyl <[email-masked]>,
 Jedrzej Jagielski <[email-masked]>,
 Mateusz Polchlopek <[email-masked]>,
 Anton Nadezhdin <[email-masked]>,
 Konstantin Ilichev <[email-masked]>,
 Milena Olech <[email-masked]>, [email-masked],
 [email-masked],
 Aleksandr Loktionov <[email-masked]>,
 Samuel Salin <[email-masked]>,
 Chittim Madhu <[email-masked]>, Joshua Hay
 <[email-masked]>, Andrzej Wilczynski
 <[email-masked]>, [email-masked],
 Rafal Romanowski <[email-masked]>,
 Koichiro Den <[email-masked]>, Rinitha S <[email-masked]>,
 Paul Menzel <[email-masked]>
Message-ID: <[email-masked]>
Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01 (idpf,
 ixgbe, ixgbevf)
References: <[email-masked]>
 <[email-masked]>
In-Reply-To: <[email-masked]>

--------------Azm0zU53o60pvhlQNB5qML1T
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

On 10/3/2025 10:42 AM, Jakub Kicinski wrote:
> On Wed, 01 Oct 2025 17:14:10 -0700 Jacob Keller wrote:
>> Signed-off-by: Jacob Keller <[email-masked]>
>=20
> We need your sign-off on the patches.
> Sorry for not noticing earlier.

Argh. Apologies for missing that. I'll resend the ones besides the idpf
fix you commented on.

Thanks,
Jake

--------------Azm0zU53o60pvhlQNB5qML1T--

--------------96EDbU6sWthWZt04r9Luv1Sz
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Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature.asc"

--------------96EDbU6sWthWZt04r9Luv1Sz--

From - Fri Oct 17 14:26:31 2025
Delivery-date: Fri, 03 Oct 2025 16:56:54 +0000
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Feedback-ID: i10464835:Fastmail
Date: Fri, 3 Oct 2025 17:56:44 +0100
From: Kiryl Shutsemau <[email-masked]>
To: Andrew Morton <[email-masked]>, 
	David Hildenbrand <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
	"Liam R. Howlett" <[email-masked]>, Ryan Roberts <[email-masked]>
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	Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>, [email-masked], 
	[email-masked], [email-masked], Josef Bacik <[email-masked]>, 
	Amir Goldstein <[email-masked]>, Jan Kara <[email-masked]>
Subject: Re: [PATCH] mm/mmap: Fix fsnotify_mmap_perm() call in vm_mmap_pgoff()
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On Fri, Oct 03, 2025 at 04:58:04PM +0100, Kiryl Shutsemau wrote:
> From: Kiryl Shutsemau <[email-masked]>
> 
> vm_mmap_pgoff() includes a fsnotify call that allows for pre-content
> hooks on mmap().
> 
> The fsnotify_mmap_perm() function takes, among other arguments, an
> offset in the file in the form of loff_t. However, vm_mmap_pgoff() has
> file offset in the form of pgoff. This offset needs to be converted
> before being passed to fsnotify_mmap_perm().
> 
> The conversion from pgoff to loff_t is incorrect. The pgoff value needs
> to be shifted left by PAGE_SHIFT to obtain loff_t, not right.
> 
> This issue was identified through code inspection.
> 
> Signed-off-by: Kiryl Shutsemau <[email-masked]>
> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> Cc: [email-masked]
> Cc: Josef Bacik <[email-masked]>
> Cc: Amir Goldstein <[email-masked]>
> Cc: Jan Kara <[email-masked]>
> ---
>  mm/util.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/util.c b/mm/util.c
> index f814e6a59ab1..52a667157264 100644
> --- a/mm/util.c
> +++ b/mm/util.c
> @@ -573,7 +573,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>  
>  	ret = security_mmap_file(file, prot, flag);
>  	if (!ret)
> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
> +		ret = fsnotify_mmap_perm(file, prot, pgoff << PAGE_SHIFT, len);

It misses the case to (loff_t) and it broken for 32-bit machines.

Luckily, Ryan submitted another fix for the same bug at the almost the
same time. And he was more careful around types:

https://lore.kernel.org/all/[email-masked]

-- 
  Kiryl Shutsemau / Kirill A. Shutemov

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Date: Fri, 3 Oct 2025 22:37:56 +0530
Subject: Re: [PATCH] mm/mmap: Fix fsnotify_mmap_perm() call in vm_mmap_pgoff()
To: Kiryl Shutsemau <[email-masked]>,
 Andrew Morton <[email-masked]>,
 David Hildenbrand <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>,
 Ryan Roberts <[email-masked]>
Cc: Vlastimil Babka <[email-masked]>, Mike Rapoport <[email-masked]>,
 Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
 [email-masked], [email-masked], [email-masked],
 Josef Bacik <[email-masked]>, Amir Goldstein <[email-masked]>,
 Jan Kara <[email-masked]>
From: Dev Jain <[email-masked]>
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On 03/10/25 10:26 pm, Kiryl Shutsemau wrote:
> On Fri, Oct 03, 2025 at 04:58:04PM +0100, Kiryl Shutsemau wrote:
>> From: Kiryl Shutsemau <[email-masked]>
>>
>> vm_mmap_pgoff() includes a fsnotify call that allows for pre-content
>> hooks on mmap().
>>
>> The fsnotify_mmap_perm() function takes, among other arguments, an
>> offset in the file in the form of loff_t. However, vm_mmap_pgoff() has
>> file offset in the form of pgoff. This offset needs to be converted
>> before being passed to fsnotify_mmap_perm().
>>
>> The conversion from pgoff to loff_t is incorrect. The pgoff value needs
>> to be shifted left by PAGE_SHIFT to obtain loff_t, not right.
>>
>> This issue was identified through code inspection.
>>
>> Signed-off-by: Kiryl Shutsemau <[email-masked]>
>> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
>> Cc: [email-masked]
>> Cc: Josef Bacik <[email-masked]>
>> Cc: Amir Goldstein <[email-masked]>
>> Cc: Jan Kara <[email-masked]>
>> ---
>>   mm/util.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/mm/util.c b/mm/util.c
>> index f814e6a59ab1..52a667157264 100644
>> --- a/mm/util.c
>> +++ b/mm/util.c
>> @@ -573,7 +573,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
>>   
>>   	ret = security_mmap_file(file, prot, flag);
>>   	if (!ret)
>> -		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
>> +		ret = fsnotify_mmap_perm(file, prot, pgoff << PAGE_SHIFT, len);
> It misses the case to (loff_t) and it broken for 32-bit machines.
>
> Luckily, Ryan submitted another fix for the same bug at the almost the
> same time. And he was more careful around types:
>
> https://lore.kernel.org/all/[email-masked]

Oops! I need to be more careful...

>

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Date: Fri, 3 Oct 2025 10:42:24 -0700
From: Jakub Kicinski <[email-masked]>
To: Jacob Keller <[email-masked]>
Cc: Przemek Kitszel <[email-masked]>, Andrew Lunn
 <[email-masked]>, "David S. Miller" <[email-masked]>, Eric
 Dumazet <[email-masked]>, Paolo Abeni <[email-masked]>, Emil
 Tantilov <[email-masked]>, Pavan Kumar Linga
 <[email-masked]>, Alexander Lobakin
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 Sridhar Samudrala <[email-masked]>, Phani Burra
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 <[email-masked]>, Konstantin Ilichev
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 <[email-masked]>, Samuel Salin <[email-masked]>,
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 <[email-masked]>, Andrzej Wilczynski
 <[email-masked]>, [email-masked], Rafal Romanowski
 <[email-masked]>, Koichiro Den <[email-masked]>, Rinitha S
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Subject: Re: [PATCH net 0/8] Intel Wired LAN Driver Updates 2025-10-01
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On Wed, 01 Oct 2025 17:14:10 -0700 Jacob Keller wrote:
> Signed-off-by: Jacob Keller <[email-masked]>

We need your sign-off on the patches.
Sorry for not noticing earlier.

From - Fri Oct 17 14:26:31 2025
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Cc: SeongJae Park <[email-masked]>,
	"# 6 . 15 . x" <[email-masked]>,
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Subject: [PATCH 2/2] mm/damon/sysfs: dealloc commit test ctx always
Date: Fri,  3 Oct 2025 13:14:55 -0700
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The damon_ctx for testing online DAMON parameters commit inputs is
deallocated only when the test fails.  This means memory is leaked for
every successful online DAMON parameters commit.  Fix the leak by always
deallocating it.

Fixes: 4c9ea539ad59 ("mm/damon/sysfs: validate user inputs from damon_sysfs_commit_input()")
Cc: <[email-masked]> # 6.15.x
Signed-off-by: SeongJae Park <[email-masked]>
---
 mm/damon/sysfs.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 27ebfe016871..ccfb624a94b8 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1476,12 +1476,11 @@ static int damon_sysfs_commit_input(void *data)
 	if (!test_ctx)
 		return -ENOMEM;
 	err = damon_commit_ctx(test_ctx, param_ctx);
-	if (err) {
-		damon_destroy_ctx(test_ctx);
+	if (err)
 		goto out;
-	}
 	err = damon_commit_ctx(kdamond->damon_ctx, param_ctx);
 out:
+	damon_destroy_ctx(test_ctx);
 	damon_destroy_ctx(param_ctx);
 	return err;
 }
-- 
2.39.5

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From: SeongJae Park <[email-masked]>
To: Andrew Morton <[email-masked]>
Cc: SeongJae Park <[email-masked]>,
	"# 6 . 15 . x" <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH 0/2] mm/damon/sysfs: fix commit test damon_ctx [de]allocation
Date: Fri,  3 Oct 2025 13:14:53 -0700
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DAMON sysfs interface dynamically allocates and uses a damon_ctx object
for testing if given inputs for online DAMON parameters update is valid.
The object is being used without an allocation failure check, and leaked
when the test succeeds.  Fix the two bugs.

SeongJae Park (2):
  mm/damon/sysfs: catch commit test ctx alloc failure
  mm/damon/sysfs: dealloc commit test ctx always

 mm/damon/sysfs.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

base-commit: 3c39180d389ca58cf309b7aa58b6a3617151c226
-- 
2.39.5

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From: SeongJae Park <[email-masked]>
To: Andrew Morton <[email-masked]>
Cc: SeongJae Park <[email-masked]>,
	"# 6 . 15 . x" <[email-masked]>,
	[email-masked],
	[email-masked],
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Subject: [PATCH 1/2] mm/damon/sysfs: catch commit test ctx alloc failure
Date: Fri,  3 Oct 2025 13:14:54 -0700
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The damon_ctx for testing online DAMON parameters commit inputs is used
without its allocation failure check.  This could result in an invalid
memory access.  Fix it by directly returning an error when the
allocation failed.

Fixes: 4c9ea539ad59 ("mm/damon/sysfs: validate user inputs from damon_sysfs_commit_input()")
Cc: <[email-masked]> # 6.15.x
Signed-off-by: SeongJae Park <[email-masked]>
---
 mm/damon/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index a212877ed240..27ebfe016871 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1473,6 +1473,8 @@ static int damon_sysfs_commit_input(void *data)
 	if (IS_ERR(param_ctx))
 		return PTR_ERR(param_ctx);
 	test_ctx = damon_new_ctx();
+	if (!test_ctx)
+		return -ENOMEM;
 	err = damon_commit_ctx(test_ctx, param_ctx);
 	if (err) {
 		damon_destroy_ctx(test_ctx);
-- 
2.39.5

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From: Kiryl Shutsemau <[email-masked]>
To: Andrew Morton <[email-masked]>,
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Cc: Vlastimil Babka <[email-masked]>,
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	[email-masked],
	Josef Bacik <[email-masked]>,
	Amir Goldstein <[email-masked]>,
	Jan Kara <[email-masked]>
Subject: [PATCH] mm/mmap: Fix fsnotify_mmap_perm() call in vm_mmap_pgoff()
Date: Fri,  3 Oct 2025 16:58:04 +0100
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From: Kiryl Shutsemau <[email-masked]>

vm_mmap_pgoff() includes a fsnotify call that allows for pre-content
hooks on mmap().

The fsnotify_mmap_perm() function takes, among other arguments, an
offset in the file in the form of loff_t. However, vm_mmap_pgoff() has
file offset in the form of pgoff. This offset needs to be converted
before being passed to fsnotify_mmap_perm().

The conversion from pgoff to loff_t is incorrect. The pgoff value needs
to be shifted left by PAGE_SHIFT to obtain loff_t, not right.

This issue was identified through code inspection.

Signed-off-by: Kiryl Shutsemau <[email-masked]>
Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
Cc: [email-masked]
Cc: Josef Bacik <[email-masked]>
Cc: Amir Goldstein <[email-masked]>
Cc: Jan Kara <[email-masked]>
---
 mm/util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/util.c b/mm/util.c
index f814e6a59ab1..52a667157264 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -573,7 +573,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
 
 	ret = security_mmap_file(file, prot, flag);
 	if (!ret)
-		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
+		ret = fsnotify_mmap_perm(file, prot, pgoff << PAGE_SHIFT, len);
 	if (!ret) {
 		if (mmap_write_lock_killable(mm))
 			return -EINTR;
-- 
2.50.1

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Date: Fri, 3 Oct 2025 17:00:56 +0100
From: Kiryl Shutsemau <[email-masked]>
To: Ryan Roberts <[email-masked]>
Cc: Andrew Morton <[email-masked]>, 
	David Hildenbrand <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
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	Michal Hocko <[email-masked]>, Amir Goldstein <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
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On Fri, Oct 03, 2025 at 04:52:36PM +0100, Ryan Roberts wrote:
> fsnotify_mmap_perm() requires a byte offset for the file about to be
> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> Previously the conversion was done incorrectly so let's fix it, being
> careful not to overflow on 32-bit platforms.
> 
> Discovered during code review.

Heh. Just submitted fix for the same issue:

https://lore.kernel.org/all/[email-masked]/T/#u

-- 
  Kiryl Shutsemau / Kirill A. Shutemov

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Date: Fri, 3 Oct 2025 21:55:00 +0530
Subject: Re: [PATCH] mm/mmap: Fix fsnotify_mmap_perm() call in vm_mmap_pgoff()
To: Kiryl Shutsemau <[email-masked]>,
 Andrew Morton <[email-masked]>,
 David Hildenbrand <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>
Cc: Vlastimil Babka <[email-masked]>, Mike Rapoport <[email-masked]>,
 Suren Baghdasaryan <[email-masked]>, Michal Hocko <[email-masked]>,
 [email-masked], [email-masked],
 Kiryl Shutsemau <[email-masked]>, [email-masked],
 Josef Bacik <[email-masked]>, Amir Goldstein <[email-masked]>,
 Jan Kara <[email-masked]>
From: Dev Jain <[email-masked]>
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On 03/10/25 9:28 pm, Kiryl Shutsemau wrote:
> From: Kiryl Shutsemau <[email-masked]>
>
> vm_mmap_pgoff() includes a fsnotify call that allows for pre-content
> hooks on mmap().
>
> The fsnotify_mmap_perm() function takes, among other arguments, an
> offset in the file in the form of loff_t. However, vm_mmap_pgoff() has
> file offset in the form of pgoff. This offset needs to be converted
> before being passed to fsnotify_mmap_perm().
>
> The conversion from pgoff to loff_t is incorrect. The pgoff value needs
> to be shifted left by PAGE_SHIFT to obtain loff_t, not right.
>
> This issue was identified through code inspection.
>
> Signed-off-by: Kiryl Shutsemau <[email-masked]>
> Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
> Cc: [email-masked]
> Cc: Josef Bacik <[email-masked]>
> Cc: Amir Goldstein <[email-masked]>
> Cc: Jan Kara <[email-masked]>
> ---
>   

Reviewed-by: Dev Jain <[email-masked]>

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Date: Fri, 3 Oct 2025 17:36:23 +0100
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
To: Kiryl Shutsemau <[email-masked]>
Cc: Andrew Morton <[email-masked]>,
 David Hildenbrand <[email-masked]>,
 Lorenzo Stoakes <[email-masked]>,
 "Liam R. Howlett" <[email-masked]>, Vlastimil Babka
 <[email-masked]>, Mike Rapoport <[email-masked]>,
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 [email-masked], [email-masked]
From: Ryan Roberts <[email-masked]>
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On 03/10/2025 17:00, Kiryl Shutsemau wrote:
> On Fri, Oct 03, 2025 at 04:52:36PM +0100, Ryan Roberts wrote:
>> fsnotify_mmap_perm() requires a byte offset for the file about to be
>> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
>> Previously the conversion was done incorrectly so let's fix it, being
>> careful not to overflow on 32-bit platforms.
>>
>> Discovered during code review.
> 
> Heh. Just submitted fix for the same issue:
> 
> https://lore.kernel.org/all/[email-masked]/T/#u
> 

Ha... great minds...

I notice that for your version you're just doing "pgoff << PAGE_SHIFT" without
casting pgoff.

I'm not sure if that is safe?

pgoff is unsigned long (so 32 bits on 32 bit systems). loff_t is unsigned long
long (so always 64 bits). So is it possible that you shift off the end of 32
bits and lose those bits without a cast to loff_t first?

TBH my knowledge of the exact rules is shaky...

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Date: Fri, 3 Oct 2025 17:54:03 +0100
From: Kiryl Shutsemau <[email-masked]>
To: Ryan Roberts <[email-masked]>
Cc: Andrew Morton <[email-masked]>, 
	David Hildenbrand <[email-masked]>, Lorenzo Stoakes <[email-masked]>, 
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	Michal Hocko <[email-masked]>, Amir Goldstein <[email-masked]>, [email-masked], 
	[email-masked], [email-masked]
Subject: Re: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
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On Fri, Oct 03, 2025 at 05:36:23PM +0100, Ryan Roberts wrote:
> On 03/10/2025 17:00, Kiryl Shutsemau wrote:
> > On Fri, Oct 03, 2025 at 04:52:36PM +0100, Ryan Roberts wrote:
> >> fsnotify_mmap_perm() requires a byte offset for the file about to be
> >> mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
> >> Previously the conversion was done incorrectly so let's fix it, being
> >> careful not to overflow on 32-bit platforms.
> >>
> >> Discovered during code review.
> > 
> > Heh. Just submitted fix for the same issue:
> > 
> > https://lore.kernel.org/all/[email-masked]/T/#u
> > 
> 
> Ha... great minds...
> 
> I notice that for your version you're just doing "pgoff << PAGE_SHIFT" without
> casting pgoff.
> 
> I'm not sure if that is safe?
> 
> pgoff is unsigned long (so 32 bits on 32 bit systems). loff_t is unsigned long
> long (so always 64 bits). So is it possible that you shift off the end of 32
> bits and lose those bits without a cast to loff_t first?
> 
> TBH my knowledge of the exact rules is shaky...

I think you are right. Missing cast in my patch might be problematic on
32-bit machines.

Reviewed-by: Kiryl Shutsemau <[email-masked]>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov

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Subject: [PATCH v2 18/19 5.15.y] minmax.h: simplify the variants of clamp()
Date: Fri, 3 Oct 2025 13:00:05 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ]

Always pass a 'type' through to __clamp_once(), pass '__auto_type' from
clamp() itself.

The expansion of __types_ok3() is reasonable so it isn't worth the added
complexity of avoiding it when a fixed type is used for all three values.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 75fb7a6ad4c6..2bbdd5b5e07e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -183,29 +183,29 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
+#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({			\
+	type uval = (val);							\
+	type ulo = (lo);							\
+	type uhi = (hi);							\
 	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+#define __careful_clamp(type, val, lo, hi) \
+	__clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
- * clamp - return a value clamped to a given range with strict typechecking
+ * clamp - return a value clamped to a given range with typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
- * same type as @val.  See the unnecessary pointer comparisons.
+ * This macro checks @val/@lo/@hi to make sure they have compatible
+ * signedness.
  */
-#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
+#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
 
 /**
  * clamp_t - return a value clamped to a given range using a given type
@@ -217,7 +217,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
+#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
@@ -230,7 +230,7 @@
  * type and @lo and @hi are literals that will otherwise be assigned a signed
  * integer type.
  */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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Subject: [PATCH v2 19/19 5.15.y] minmax.h: remove some #defines that are only expanded once
Date: Fri, 3 Oct 2025 13:00:06 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 2b97aaf74ed534fb838d09867d09a3ca5d795208 ]

The bodies of __signed_type_use() and __unsigned_type_use() are much the
same size as their names - so put the bodies in the only line that expands
them.

Similarly __signed_type() is defined separately for 64bit and then used
exactly once just below.

Change the test for __signed_type from CONFIG_64BIT to one based on gcc
defined macros so that the code is valid if it gets used outside of a
kernel build.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2bbdd5b5e07e..eaaf5c008e4d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,8 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(ux) (2 + __is_nonneg(ux))
-#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
 #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(ux) : __unsigned_type_use(ux))
+	(2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -57,7 +55,7 @@
  * A cast is needed to avoid any warnings from values that aren't signed
  * integer types (in which case the result doesn't matter).
  *
- * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * On 64-bit any integer or pointer type can safely be cast to 'long long'.
  * But on 32-bit we need to avoid warnings about casting pointers to integers
  * of different sizes without truncating 64-bit values so 'long' or 'long long'
  * must be used depending on the size of the value.
@@ -66,12 +64,12 @@
  * them, but we do not use s128 types in the kernel (we do use 'u128',
  * but they are handled by the !is_signed_type() case).
  */
-#ifdef CONFIG_64BIT
-  #define __signed_type(ux) long
+#if __SIZEOF_POINTER__ == __SIZEOF_LONG_LONG__
+#define __is_nonneg(ux) statically_true((long long)(ux) >= 0)
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
+#define __is_nonneg(ux) statically_true( \
+	(typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
 #endif
-#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
 #define __types_ok(ux, uy) \
 	(__sign_use(ux) & __sign_use(uy))
-- 
2.47.3

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--=-jvh4cueVjwyOExiJXg2C
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hi,

Le mercredi 17 septembre 2025 =C3=A0 17:40 +0800, Haoxiang Li a =C3=A9crit=
=C2=A0:
> Add check for the return value of vpu_get_plat_device() to prevent null
> pointer dereference. And vpu_get_plat_device() increases the reference
> count of the returned platform device. Add platform_device_put() to
> prevent reference leak. Also add platform_device_put() in mtk_mdp_remove(=
).

I think we should improve the subject a little. What about ?

  media: mtk-mdp: Fix error handling in probe function

Nicolas

>=20
> Add mtk_mdp_unregister_m2m_device() on the error handling path.
>=20
> Fixes: c8eb2d7e8202 ("[media] media: Add Mediatek MDP Driver")
> Cc: [email-masked]
> Signed-off-by: Haoxiang Li <[email-masked]>
> ---
> Changes in v2:
> - Add check for vpu_get_plat_device()
> - Add platform_device_put() in mtk_mdp_remove()
> - Add mtk_mdp_unregister_m2m_device() on the error handling path.
> - Modify the patch title and description. I think you are right.
> =C2=A0 Thanks, CJ!
> ---
> =C2=A0.../media/platform/mediatek/mdp/mtk_mdp_core.c=C2=A0 | 17 +++++++++=
++++++--
> =C2=A01 file changed, 15 insertions(+), 2 deletions(-)
>=20
> diff --git a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
> b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
> index 80fdc6ff57e0..8432833814f3 100644
> --- a/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
> +++ b/drivers/media/platform/mediatek/mdp/mtk_mdp_core.c
> @@ -194,11 +194,17 @@ static int mtk_mdp_probe(struct platform_device *pd=
ev)
> =C2=A0	}
> =C2=A0
> =C2=A0	mdp->vpu_dev =3D vpu_get_plat_device(pdev);
> +	if (!mdp->vpu_dev) {
> +		dev_err(&pdev->dev, "Failed to get vpu device\n");
> +		ret =3D -ENODEV;
> +		goto err_vpu_get_dev;
> +	}
> +
> =C2=A0	ret =3D vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, m=
dp,
> =C2=A0				=C2=A0 VPU_RST_MDP);
> =C2=A0	if (ret) {
> =C2=A0		dev_err(&pdev->dev, "Failed to register reset handler\n");
> -		goto err_m2m_register;
> +		goto err_reg_handler;
> =C2=A0	}
> =C2=A0
> =C2=A0	platform_set_drvdata(pdev, mdp);
> @@ -206,7 +212,7 @@ static int mtk_mdp_probe(struct platform_device *pdev=
)
> =C2=A0	ret =3D vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(3=
2));
> =C2=A0	if (ret) {
> =C2=A0		dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
> -		goto err_m2m_register;
> +		goto err_reg_handler;
> =C2=A0	}
> =C2=A0
> =C2=A0	pm_runtime_enable(dev);
> @@ -214,6 +220,12 @@ static int mtk_mdp_probe(struct platform_device *pde=
v)
> =C2=A0
> =C2=A0	return 0;
> =C2=A0
> +err_reg_handler:
> +	platform_device_put(mdp->vpu_dev);
> +
> +err_vpu_get_dev:
> +	mtk_mdp_unregister_m2m_device(mdp);
> +
> =C2=A0err_m2m_register:
> =C2=A0	v4l2_device_unregister(&mdp->v4l2_dev);
> =C2=A0
> @@ -242,6 +254,7 @@ static void mtk_mdp_remove(struct platform_device *pd=
ev)
> =C2=A0
> =C2=A0	pm_runtime_disable(&pdev->dev);
> =C2=A0	vb2_dma_contig_clear_max_seg_size(&pdev->dev);
> +	platform_device_put(mdp->vpu_dev);
> =C2=A0	mtk_mdp_unregister_m2m_device(mdp);
> =C2=A0	v4l2_device_unregister(&mdp->v4l2_dev);
> =C2=A0

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From: Ryan Roberts <[email-masked]>
To: Andrew Morton <[email-masked]>,
	David Hildenbrand <[email-masked]>,
	Lorenzo Stoakes <[email-masked]>,
	"Liam R. Howlett" <[email-masked]>,
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Cc: Ryan Roberts <[email-masked]>,
	[email-masked],
	[email-masked],
	[email-masked]
Subject: [PATCH v1] fsnotify: Pass correct offset to fsnotify_mmap_perm()
Date: Fri,  3 Oct 2025 16:52:36 +0100
                             query to Validity was blocked.  See
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fsnotify_mmap_perm() requires a byte offset for the file about to be
mmap'ed. But it is called from vm_mmap_pgoff(), which has a page offset.
Previously the conversion was done incorrectly so let's fix it, being
careful not to overflow on 32-bit platforms.

Discovered during code review.

Cc: <[email-masked]>
Fixes: 066e053fe208 ("fsnotify: add pre-content hooks on mmap()")
Signed-off-by: Ryan Roberts <[email-masked]>
---
Applies against today's mm-unstable (aa05a436eca8).

Thanks,
Ryan

 mm/util.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/util.c b/mm/util.c
index 6c1d64ed0221..8989d5767528 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -566,6 +566,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
 	unsigned long len, unsigned long prot,
 	unsigned long flag, unsigned long pgoff)
 {
+	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
 	unsigned long ret;
 	struct mm_struct *mm = current->mm;
 	unsigned long populate;
@@ -573,7 +574,7 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,

 	ret = security_mmap_file(file, prot, flag);
 	if (!ret)
-		ret = fsnotify_mmap_perm(file, prot, pgoff >> PAGE_SHIFT, len);
+		ret = fsnotify_mmap_perm(file, prot, off, len);
 	if (!ret) {
 		if (mmap_write_lock_killable(mm))
 			return -EINTR;
--
2.43.0

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Subject: [PATCH v2 15/19 5.15.y] minmax.h: reduce the #define expansion of min(), max() and clamp()
Date: Fri, 3 Oct 2025 13:00:02 +0000
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From: David Laight <[email-masked]>

[ Upstream commit b280bb27a9f7c91ddab730e1ad91a9c18a051f41 ]

Since the test for signed values being non-negative only relies on
__builtion_constant_p() (not is_constexpr()) it can use the 'ux' variable
instead of the caller supplied expression.  This means that the #define
parameters are only expanded twice.  Once in the code and once quoted in
the error message.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 24e4b372649a..6f7ea669d305 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,10 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
-#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
-#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
+#define __signed_type_use(ux) (2 + __is_nonneg(ux))
+#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(ux) : __unsigned_type_use(ux))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -71,13 +71,13 @@
 #else
   #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
+#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
-#define __types_ok(x, y, ux, uy) \
-	(__sign_use(x, ux) & __sign_use(y, uy))
+#define __types_ok(ux, uy) \
+	(__sign_use(ux) & __sign_use(uy))
 
-#define __types_ok3(x, y, z, ux, uy, uz) \
-	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
+#define __types_ok3(ux, uy, uz) \
+	(__sign_use(ux) & __sign_use(uy) & __sign_use(uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -92,7 +92,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(ux, uy),		\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -109,7 +109,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -149,7 +149,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(ux, uy, uz),			\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
-- 
2.47.3

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Subject: [PATCH v2 17/19 5.15.y] minmax.h: move all the clamp() definitions after the min/max() ones
Date: Fri, 3 Oct 2025 13:00:04 +0000
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From: David Laight <[email-masked]>

[ Upstream commit c3939872ee4a6b8bdcd0e813c66823b31e6e26f7 ]

At some point the definitions for clamp() got added in the middle of the
ones for min() and max().  Re-order the definitions so they are more
sensibly grouped.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 109 +++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 58 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 91aa1b90c1bb..75fb7a6ad4c6 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -99,22 +99,6 @@
 #define __careful_cmp(op, x, y) \
 	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __clamp(val, lo, hi)	\
-	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
-	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
-		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
-		"clamp("#val", "#lo", "#hi") signedness error");		\
-	__clamp(uval, ulo, uhi); })
-
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
-
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -170,6 +154,22 @@
 #define max3(x, y, z) \
 	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
+/**
+ * min_t - return minimum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
+
+/**
+ * max_t - return maximum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
@@ -180,6 +180,22 @@
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
@@ -191,28 +207,30 @@
  */
 #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
-/*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max/clamp at all, of course.
- */
-
 /**
- * min_t - return minimum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_t - return a value clamped to a given range using a given type
+ * @type: the type of variable to use
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of type
+ * @type to make all the comparisons.
  */
-#define min_t(type, x, y) __cmp_once(min, type, x, y)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
- * max_t - return maximum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_val - return a value clamped to a given range using val's type
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of whatever
+ * type the input argument @val is.  This is useful when @val is an unsigned
+ * type and @lo and @hi are literals that will otherwise be assigned a signed
+ * integer type.
  */
-#define max_t(type, x, y) __cmp_once(max, type, x, y)
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
@@ -257,31 +275,6 @@
  */
 #define max_array(array, len) __minmax_array(max, array, len)
 
-/**
- * clamp_t - return a value clamped to a given range using a given type
- * @type: the type of variable to use
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of type
- * @type to make all the comparisons.
- */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
-
-/**
- * clamp_val - return a value clamped to a given range using val's type
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of whatever
- * type the input argument @val is.  This is useful when @val is an unsigned
- * type and @lo and @hi are literals that will otherwise be assigned a signed
- * integer type.
- */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
-
 static inline bool in_range64(u64 val, u64 start, u64 len)
 {
 	return (val - start) < len;
-- 
2.47.3

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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
	Dan Carpenter <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH v2 16/19 5.15.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
Date: Fri, 3 Oct 2025 13:00:03 +0000
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From: David Laight <[email-masked]>

[ Upstream commit a5743f32baec4728711bbc01d6ac2b33d4c67040 ]

Use BUILD_BUG_ON_MSG(statically_true(ulo > uhi), ...) for the sanity check
of the bounds in clamp().  Gives better error coverage and one less
expansion of the arguments.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 6f7ea669d305..91aa1b90c1bb 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -106,8 +106,7 @@
 	__auto_type uval = (val);						\
 	__auto_type ulo = (lo);							\
 	__auto_type uhi = (hi);							\
-	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-			(lo) <= (hi), true),					\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
-- 
2.47.3

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Subject: [PATCH v2 12/19 5.15.y] minmax: fix up min3() and max3() too
Date: Fri, 3 Oct 2025 12:59:59 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 21b136cc63d2a9ddd60d4699552b69c214b32964 ]

David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.

And our current macros are actually rather broken.

In particular, the macros did this:

  #define min3(x, y, z) min((typeof(x))min(x, y), z)
  #define max3(x, y, z) max((typeof(x))max(x, y), z)

and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.

For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'.  The types are
compatible, and there's no warning - but the result is just random
garbage.

No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.

Requested-by: David Laight <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 41da6f85a407..98008dd92153 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -152,13 +152,20 @@
 #define umax(x, y)	\
 	__careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
 
+#define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
+	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
+	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+		#op"3("#x", "#y", "#z") signedness error");		\
+	__cmp(op, ux, __cmp(op, uy, uz)); })
+
 /**
  * min3 - return minimum of three values
  * @x: first value
  * @y: second value
  * @z: third value
  */
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
+#define min3(x, y, z) \
+	__careful_op3(min, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * max3 - return maximum of three values
@@ -166,7 +173,8 @@
  * @y: second value
  * @z: third value
  */
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
+#define max3(x, y, z) \
+	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
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Subject: [PATCH v2 14/19 5.15.y] minmax.h: update some comments
Date: Fri, 3 Oct 2025 13:00:01 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 10666e99204818ef45c702469488353b5bb09ec7 ]

- Change three to several.
- Remove the comment about retaining constant expressions, no longer true.
- Realign to nearer 80 columns and break on major punctiation.
- Add a leading comment to the block before __signed_type() and __is_nonneg()
  Otherwise the block explaining the cast is a bit 'floating'.
  Reword the rest of that comment to improve readability.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 53 +++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 51b0d988e322..24e4b372649a 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 
 /*
- * min()/max()/clamp() macros must accomplish three things:
+ * min()/max()/clamp() macros must accomplish several things:
  *
  * - Avoid multiple evaluations of the arguments (so side-effects like
  *   "x++" happen only once) when non-constant.
- * - Retain result as a constant expressions when called with only
- *   constant expressions (to avoid tripping VLA warnings in stack
- *   allocation usage).
  * - Perform signed v unsigned type-checking (to generate compile
  *   errors instead of nasty runtime surprises).
  * - Unsigned char/short are always promoted to signed int and can be
@@ -31,25 +28,23 @@
  *   bit #0 set if ok for unsigned comparisons
  *   bit #1 set if ok for signed comparisons
  *
- * In particular, statically non-negative signed integer
- * expressions are ok for both.
+ * In particular, statically non-negative signed integer expressions
+ * are ok for both.
  *
- * NOTE! Unsigned types smaller than 'int' are implicitly
- * converted to 'int' in expressions, and are accepted for
- * signed conversions for now. This is debatable.
+ * NOTE! Unsigned types smaller than 'int' are implicitly converted to 'int'
+ * in expressions, and are accepted for signed conversions for now.
+ * This is debatable.
  *
- * Note that 'x' is the original expression, and 'ux' is
- * the unique variable that contains the value.
+ * Note that 'x' is the original expression, and 'ux' is the unique variable
+ * that contains the value.
  *
- * We use 'ux' for pure type checking, and 'x' for when
- * we need to look at the value (but without evaluating
- * it for side effects! Careful to only ever evaluate it
- * with sizeof() or __builtin_constant_p() etc).
+ * We use 'ux' for pure type checking, and 'x' for when we need to look at the
+ * value (but without evaluating it for side effects!
+ * Careful to only ever evaluate it with sizeof() or __builtin_constant_p() etc).
  *
- * Pointers end up being checked by the normal C type
- * rules at the actual comparison, and these expressions
- * only need to be careful to not cause warnings for
- * pointer use.
+ * Pointers end up being checked by the normal C type rules at the actual
+ * comparison, and these expressions only need to be careful to not cause
+ * warnings for pointer use.
  */
 #define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
 #define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
@@ -57,19 +52,19 @@
 	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
- * To avoid warnings about casting pointers to integers
- * of different sizes, we need that special sign type.
+ * Check whether a signed value is always non-negative.
  *
- * On 64-bit we can just always use 'long', since any
- * integer or pointer type can just be cast to that.
+ * A cast is needed to avoid any warnings from values that aren't signed
+ * integer types (in which case the result doesn't matter).
  *
- * This does not work for 128-bit signed integers since
- * the cast would truncate them, but we do not use s128
- * types in the kernel (we do use 'u128', but they will
- * be handled by the !is_signed_type() case).
+ * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * But on 32-bit we need to avoid warnings about casting pointers to integers
+ * of different sizes without truncating 64-bit values so 'long' or 'long long'
+ * must be used depending on the size of the value.
  *
- * NOTE! The cast is there only to avoid any warnings
- * from when values that aren't signed integer types.
+ * This does not work for 128-bit signed integers since the cast would truncate
+ * them, but we do not use s128 types in the kernel (we do use 'u128',
+ * but they are handled by the !is_signed_type() case).
  */
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
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Subject: [PATCH v2 13/19 5.15.y] minmax.h: add whitespace around operators and after commas
Date: Fri, 3 Oct 2025 13:00:00 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 71ee9b16251ea4bf7c1fe222517c82bdb3220acc ]

Patch series "minmax.h: Cleanups and minor optimisations".

Some tidyups and minor changes to minmax.h.

This patch (of 7):

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 98008dd92153..51b0d988e322 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -51,10 +51,10 @@
  * only need to be careful to not cause warnings for
  * pointer use.
  */
-#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
-#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
-#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
-	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
+#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
  * To avoid warnings about casting pointers to integers
@@ -74,15 +74,15 @@
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
+#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
 
-#define __types_ok(x,y,ux,uy) \
-	(__sign_use(x,ux) & __sign_use(y,uy))
+#define __types_ok(x, y, ux, uy) \
+	(__sign_use(x, ux) & __sign_use(y, uy))
 
-#define __types_ok3(x,y,z,ux,uy,uz) \
-	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
+#define __types_ok3(x, y, z, ux, uy, uz) \
+	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -97,7 +97,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -114,7 +114,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -154,7 +154,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
@@ -326,9 +326,9 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
-#define MIN(a,b) __cmp(min,a,b)
-#define MAX(a,b) __cmp(max,a,b)
-#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
-#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+#define MIN(a, b) __cmp(min, a, b)
+#define MAX(a, b) __cmp(max, a, b)
+#define MIN_T(type, a, b) __cmp(min, (type)(a), (type)(b))
+#define MAX_T(type, a, b) __cmp(max, (type)(a), (type)(b))
 
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v2 09/19 5.15.y] minmax: don't use max() in situations that want a C constant expression
Date: Fri, 3 Oct 2025 12:59:56 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 drivers/md/dm-integrity.c                | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index 4cd3e533740b..74b1bd331425 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -268,7 +268,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 8e2b00536c3e..9e2bbfe328f0 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1705,7 +1705,7 @@ static void integrity_metadata(struct work_struct *w)
 		struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
 		char *checksums;
 		unsigned extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0;
-		char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+		char checksums_onstack[MAX(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 		sector_t sector;
 		unsigned sectors_to_process;
 
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 51e04efe3e20..8f96ddaceb9a 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d86abdc77c26..e46eb93c115d 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1100,7 +1100,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v2 10/19 5.15.y] minmax: simplify min()/max()/clamp() implementation
Date: Fri, 3 Oct 2025 12:59:57 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit dc1c8034e31b14a2e5e212104ec508aec44ce1b9 ]

Now that we no longer have any C constant expression contexts (ie array
size declarations or static initializers) that use min() or max(), we
can simpify the implementation by not having to worry about the result
staying as a C constant expression.

So now we can unconditionally just use temporary variables of the right
type, and get rid of the excessive expansion that used to come from the
use of

   __builtin_choose_expr(__is_constexpr(...), ..

to pick the specialized code for constant expressions.

Another expansion simplification is to pass the temporary variables (in
addition to the original expression) to our __types_ok() macro.  That
may superficially look like it complicates the macro, but when we only
want the type of the expression, expanding the temporary variable names
is much simpler and smaller than expanding the potentially complicated
original expression.

As a result, on my machine, doing a

  $ time make drivers/staging/media/atomisp/pci/isp/kernels/ynr/ynr_1.0/ia_css_ynr.host.i

goes from

	real	0m16.621s
	user	0m15.360s
	sys	0m1.221s

to

	real	0m2.532s
	user	0m2.091s
	sys	0m0.452s

because the token expansion goes down dramatically.

In particular, the longest line expansion (which was line 71 of that
'ia_css_ynr.host.c' file) shrinks from 23,338kB (yes, 23MB for one
single line) to "just" 1,444kB (now "only" 1.4MB).

And yes, that line is still the line from hell, because it's doing
multiple levels of "min()/max()" expansion thanks to some of them being
hidden inside the uDIGIT_FITTING() macro.

Lorenzo has a nice cleanup patch that makes that driver use inline
functions instead of macros for sDIGIT_FITTING() and uDIGIT_FITTING(),
which will fix that line once and for all, but the 16-fold reduction in
this case does show why we need to simplify these helpers.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 43 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index fc384714da45..e3e4353df983 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -35,10 +35,10 @@
 #define __is_noneg_int(x)	\
 	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
 
-#define __types_ok(x, y) 					\
-	(__is_signed(x) == __is_signed(y) ||			\
-		__is_signed((x) + 0) == __is_signed((y) + 0) ||	\
-		__is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok(x, y, ux, uy) 				\
+	(__is_signed(ux) == __is_signed(uy) ||			\
+	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
+	 __is_noneg_int(x) || __is_noneg_int(y))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -51,34 +51,31 @@
 #define __cmp_once(op, type, x, y) \
 	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __careful_cmp_once(op, x, y) ({			\
-	static_assert(__types_ok(x, y),			\
+#define __careful_cmp_once(op, x, y, ux, uy) ({		\
+	__auto_type ux = (x); __auto_type uy = (y);	\
+	static_assert(__types_ok(x, y, ux, uy),		\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp_once(op, __auto_type, x, y); })
+	__cmp(op, ux, uy); })
 
-#define __careful_cmp(op, x, y)					\
-	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y), __careful_cmp_once(op, x, y))
+#define __careful_cmp(op, x, y) \
+	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
-	typeof(val) unique_val = (val);						\
-	typeof(lo) unique_lo = (lo);						\
-	typeof(hi) unique_hi = (hi);						\
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-	__clamp(unique_val, unique_lo, unique_hi); })
-
-#define __careful_clamp(val, lo, hi) ({					\
-	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-		__clamp(val, lo, hi),					\
-		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
-			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
  * min - return minimum of two values of the same or compatible types
-- 
2.47.3

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	<[email-masked]>
Subject: [PATCH v2 11/19 5.15.y] minmax: improve macro expansion and type checking
Date: Fri, 3 Oct 2025 12:59:58 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 22f5468731491e53356ba7c028f0fdea20b18e2c ]

This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.

In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:

 - an expression with a signed type can be used for
    (1) signed comparisons
    (2) unsigned comparisons if it is statically known to have a
        non-negative value

 - an expression with an unsigned type can be used for
    (3) unsigned comparison
    (4) signed comparisons if the type is smaller than 'int' and thus
        the C integer promotion rules will make it signed anyway

Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.

Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel.  Notably with
bcachefs having an expression like

	min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)

where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.

Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.

However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.

But at least for now the rule is in place for backwards compatibility.

Also note that rule (2) existed before, but is hugely relaxed by this
commit.  It used to be true only for the simplest compile-time
non-negative integer constants.  The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.

For example, the amdgpu driver does

	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));

because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.

Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.

Cc: Arnd Bergmann <[email-masked]>
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/compiler.h |  9 +++++
 include/linux/minmax.h   | 74 ++++++++++++++++++++++++++++++++--------
 2 files changed, 68 insertions(+), 15 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 4f03dfb6de0d..ee9e39d315c8 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -258,6 +258,15 @@ static inline void *offset_to_ptr(const int *off)
  */
 #define is_signed_type(type) (((type)(-1)) < (__force type)1)
 
+/*
+ * Useful shorthand for "is this condition known at compile-time?"
+ *
+ * Note that the condition may involve non-constant values,
+ * but the compiler may know enough about the details of the
+ * values to determine that the condition is statically true.
+ */
+#define statically_true(x) (__builtin_constant_p(x) && (x))
+
 /*
  * This is needed in functions which generate the stack canary, see
  * arch/x86/kernel/smpboot.c::start_secondary() for an example.
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index e3e4353df983..41da6f85a407 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -26,19 +26,63 @@
 #define __typecheck(x, y) \
 	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
 
-/* is_signed_type() isn't a constexpr for pointer types */
-#define __is_signed(x) 								\
-	__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))),	\
-		is_signed_type(typeof(x)), 0)
+/*
+ * __sign_use for integer expressions:
+ *   bit #0 set if ok for unsigned comparisons
+ *   bit #1 set if ok for signed comparisons
+ *
+ * In particular, statically non-negative signed integer
+ * expressions are ok for both.
+ *
+ * NOTE! Unsigned types smaller than 'int' are implicitly
+ * converted to 'int' in expressions, and are accepted for
+ * signed conversions for now. This is debatable.
+ *
+ * Note that 'x' is the original expression, and 'ux' is
+ * the unique variable that contains the value.
+ *
+ * We use 'ux' for pure type checking, and 'x' for when
+ * we need to look at the value (but without evaluating
+ * it for side effects! Careful to only ever evaluate it
+ * with sizeof() or __builtin_constant_p() etc).
+ *
+ * Pointers end up being checked by the normal C type
+ * rules at the actual comparison, and these expressions
+ * only need to be careful to not cause warnings for
+ * pointer use.
+ */
+#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
+#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
+#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
+	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+
+/*
+ * To avoid warnings about casting pointers to integers
+ * of different sizes, we need that special sign type.
+ *
+ * On 64-bit we can just always use 'long', since any
+ * integer or pointer type can just be cast to that.
+ *
+ * This does not work for 128-bit signed integers since
+ * the cast would truncate them, but we do not use s128
+ * types in the kernel (we do use 'u128', but they will
+ * be handled by the !is_signed_type() case).
+ *
+ * NOTE! The cast is there only to avoid any warnings
+ * from when values that aren't signed integer types.
+ */
+#ifdef CONFIG_64BIT
+  #define __signed_type(ux) long
+#else
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+#endif
+#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
 
-/* True for a non-negative signed int constant */
-#define __is_noneg_int(x)	\
-	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
+#define __types_ok(x,y,ux,uy) \
+	(__sign_use(x,ux) & __sign_use(y,uy))
 
-#define __types_ok(x, y, ux, uy) 				\
-	(__is_signed(ux) == __is_signed(uy) ||			\
-	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
-	 __is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok3(x,y,z,ux,uy,uz) \
+	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -53,8 +97,8 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	static_assert(__types_ok(x, y, ux, uy),		\
-		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
 #define __careful_cmp(op, x, y) \
@@ -70,8 +114,8 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
 #define __careful_clamp(val, lo, hi) \
-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v2 07/19 5.15.y] minmax: simplify and clarify min_t()/max_t() implementation
Date: Fri, 3 Oct 2025 12:59:54 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 017fa3e89187848fd056af757769c9e66ac3e93d ]

This simplifies the min_t() and max_t() macros by no longer making them
work in the context of a C constant expression.

That means that you can no longer use them for static initializers or
for array sizes in type definitions, but there were only a couple of
such uses, and all of them were converted (famous last words) to use
MIN_T/MAX_T instead.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
V1 -> V2:
Use `[ Upstream commit <HASH> ]` instead of `commit <HASH> upstream.`
like in all other patches.

 include/linux/minmax.h | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index a7ef65f78933..9c2848abc804 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -45,17 +45,20 @@
 
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
-#define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-	typeof(x) unique_x = (x);			\
-	typeof(y) unique_y = (y);			\
+#define __cmp_once_unique(op, type, x, y, ux, uy) \
+	({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
+
+#define __cmp_once(op, type, x, y) \
+	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
+
+#define __careful_cmp_once(op, x, y) ({			\
 	static_assert(__types_ok(x, y),			\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp(op, unique_x, unique_y); })
+	__cmp_once(op, __auto_type, x, y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y),				\
-		__cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y)))
+		__cmp(op, x, y), __careful_cmp_once(op, x, y))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
@@ -158,7 +161,7 @@
  * @x: first value
  * @y: second value
  */
-#define min_t(type, x, y)	__careful_cmp(min, (type)(x), (type)(y))
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
 
 /**
  * max_t - return maximum of two values, using the specified type
@@ -166,7 +169,7 @@
  * @x: first value
  * @y: second value
  */
-#define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>
CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v2 08/19 5.15.y] minmax: make generic MIN() and MAX() macros available everywhere
Date: Fri, 3 Oct 2025 12:59:55 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 1a251f52cfdc417c84411a056bc142cbd77baef4 ]

This just standardizes the use of MIN() and MAX() macros, with the very
traditional semantics.  The goal is to use these for C constant
expressions and for top-level / static initializers, and so be able to
simplify the min()/max() macros.

These macro names were used by various kernel code - they are very
traditional, after all - and all such users have been fixed up, with a
few different approaches:

 - trivial duplicated macro definitions have been removed

   Note that 'trivial' here means that it's obviously kernel code that
   already included all the major kernel headers, and thus gets the new
   generic MIN/MAX macros automatically.

 - non-trivial duplicated macro definitions are guarded with #ifndef

   This is the "yes, they define their own versions, but no, the include
   situation is not entirely obvious, and maybe they don't get the
   generic version automatically" case.

 - strange use case #1

   A couple of drivers decided that the way they want to describe their
   versioning is with

	#define MAJ 1
	#define MIN 2
	#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)

   which adds zero value and I just did my Alexander the Great
   impersonation, and rewrote that pointless Gordian knot as

	#define DRV_VERSION "1.2"

   instead.

 - strange use case #2

   A couple of drivers thought that it's a good idea to have a random
   'MIN' or 'MAX' define for a value or index into a table, rather than
   the traditional macro that takes arguments.

   These values were re-written as C enum's instead. The new
   function-line macros only expand when followed by an open
   parenthesis, and thus don't clash with enum use.

Happily, there weren't really all that many of these cases, and a lot of
users already had the pattern of using '#ifndef' guarding (or in one
case just using '#undef MIN') before defining their own private version
that does the same thing. I left such cases alone.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/um/drivers/mconsole_user.c               |  2 ++
 drivers/edac/skx_common.h                     |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  2 ++
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |  2 ++
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    | 14 +++++++----
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |  2 ++
 drivers/gpu/drm/radeon/evergreen_cs.c         |  2 ++
 drivers/hwmon/adt7475.c                       | 24 +++++++++----------
 drivers/media/dvb-frontends/stv0367_priv.h    |  3 +++
 drivers/net/fjes/fjes_main.c                  |  4 +---
 drivers/nfc/pn544/i2c.c                       |  2 --
 drivers/platform/x86/sony-laptop.c            |  1 -
 drivers/scsi/isci/init.c                      |  6 +----
 .../pci/hive_isp_css_include/math_support.h   |  5 ----
 include/linux/minmax.h                        |  2 ++
 kernel/trace/preemptirq_delay_test.c          |  2 --
 lib/btree.c                                   |  1 -
 lib/decompress_unlzma.c                       |  2 ++
 lib/zstd/zstd_internal.h                      |  2 --
 mm/zsmalloc.c                                 |  1 -
 tools/testing/selftests/vm/mremap_test.c      |  2 ++
 21 files changed, 43 insertions(+), 39 deletions(-)

diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
index e24298a734be..a04cd13c6315 100644
--- a/arch/um/drivers/mconsole_user.c
+++ b/arch/um/drivers/mconsole_user.c
@@ -71,7 +71,9 @@ static struct mconsole_command *mconsole_parse(struct mc_request *req)
 	return NULL;
 }
 
+#ifndef MIN
 #define MIN(a,b) ((a)<(b) ? (a):(b))
+#endif
 
 #define STRINGX(x) #x
 #define STRING(x) STRINGX(x)
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index 13f761930b4f..1a78f18cf7fe 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -44,7 +44,6 @@
 #define I10NM_NUM_CHANNELS	MAX(I10NM_NUM_DDR_CHANNELS, I10NM_NUM_HBM_CHANNELS)
 #define I10NM_NUM_DIMMS		MAX(I10NM_NUM_DDR_DIMMS, I10NM_NUM_HBM_DIMMS)
 
-#define MAX(a, b)	((a) > (b) ? (a) : (b))
 #define NUM_IMC		MAX(SKX_NUM_IMC, I10NM_NUM_IMC)
 #define NUM_CHANNELS	MAX(SKX_NUM_CHANNELS, I10NM_NUM_CHANNELS)
 #define NUM_DIMMS	MAX(SKX_NUM_DIMMS, I10NM_NUM_DIMMS)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index dbef22f56482..1ee8663fd866 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1277,7 +1277,9 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 
 #define amdgpu_inc_vram_lost(adev) atomic_inc(&((adev)->vram_lost_counter));
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 /* Common functions */
 bool amdgpu_device_has_job_running(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
index 1b2df97226a3..40286e8dd4e1 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
@@ -25,7 +25,9 @@
 
 #include "hdcp.h"
 
+#ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
 #define HDCP_I2C_ADDR 0x3a	/* 0x74 >> 1*/
 #define KSV_READ_SIZE 0xf	/* 0x6803b - 0x6802c */
 #define HDCP_MAX_AUX_TRANSACTION_SIZE 16
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
index dac29fe6cfc6..abbdb7731996 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
@@ -22,12 +22,18 @@
  */
 #include <asm/div64.h>
 
-#define SHIFT_AMOUNT 16 /* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+enum ppevvmath_constants {
+	/* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+	SHIFT_AMOUNT	= 16,
 
-#define PRECISION 5 /* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	/* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	PRECISION	=  5,
 
-#define SHIFTED_2 (2 << SHIFT_AMOUNT)
-#define MAX (1 << (SHIFT_AMOUNT - 1)) - 1 /* 32767 - Might change in the future */
+	SHIFTED_2	= (2 << SHIFT_AMOUNT),
+
+	/* 32767 - Might change in the future */
+	MAX		= (1 << (SHIFT_AMOUNT - 1)) - 1,
+};
 
 /* -------------------------------------------------------------------------------
  * NEW TYPE - fINT
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index d4fde146bd4c..95894c25881a 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -1964,7 +1964,9 @@ static void sienna_cichlid_get_override_pcie_settings(struct smu_context *smu,
 	}
 }
 
+#ifndef MAX
 #define MAX(a, b)	((a) > (b) ? (a) : (b))
+#endif
 
 static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
 					 uint32_t pcie_gen_cap,
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 820c2c3641d3..1311f10fad66 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -33,8 +33,10 @@
 #include "evergreen_reg_safe.h"
 #include "cayman_reg_safe.h"
 
+#ifndef MIN
 #define MAX(a,b)                   (((a)>(b))?(a):(b))
 #define MIN(a,b)                   (((a)<(b))?(a):(b))
+#endif
 
 #define REG_SAFE_BM_SIZE ARRAY_SIZE(evergreen_reg_safe_bm)
 
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index b4c0f01f52c4..1e0678eb0077 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -23,23 +23,23 @@
 #include <linux/util_macros.h>
 
 /* Indexes for the sysfs hooks */
-
-#define INPUT		0
-#define MIN		1
-#define MAX		2
-#define CONTROL		3
-#define OFFSET		3
-#define AUTOMIN		4
-#define THERM		5
-#define HYSTERSIS	6
-
+enum adt_sysfs_id {
+	INPUT		= 0,
+	MIN		= 1,
+	MAX		= 2,
+	CONTROL		= 3,
+	OFFSET		= 3,	// Dup
+	AUTOMIN		= 4,
+	THERM		= 5,
+	HYSTERSIS	= 6,
 /*
  * These are unique identifiers for the sysfs functions - unlike the
  * numbers above, these are not also indexes into an array
  */
+	ALARM		= 9,
+	FAULT		= 10,
+};
 
-#define ALARM		9
-#define FAULT		10
 
 /* 7475 Common Registers */
 
diff --git a/drivers/media/dvb-frontends/stv0367_priv.h b/drivers/media/dvb-frontends/stv0367_priv.h
index 617f605947b2..7f056d1cce82 100644
--- a/drivers/media/dvb-frontends/stv0367_priv.h
+++ b/drivers/media/dvb-frontends/stv0367_priv.h
@@ -25,8 +25,11 @@
 #endif
 
 /* MACRO definitions */
+#ifndef MIN
 #define MAX(X, Y) ((X) >= (Y) ? (X) : (Y))
 #define MIN(X, Y) ((X) <= (Y) ? (X) : (Y))
+#endif
+
 #define INRANGE(X, Y, Z) \
 	((((X) <= (Y)) && ((Y) <= (Z))) || \
 	(((Z) <= (Y)) && ((Y) <= (X))) ? 1 : 0)
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 1d1808afd529..792c22ba5b00 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -14,9 +14,7 @@
 #include "fjes.h"
 #include "fjes_trace.h"
 
-#define MAJ 1
-#define MIN 2
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
+#define DRV_VERSION "1.2"
 #define DRV_NAME	"fjes"
 char fjes_driver_name[] = DRV_NAME;
 char fjes_driver_version[] = DRV_VERSION;
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index 37d26f01986b..fd7026206f58 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -126,8 +126,6 @@ struct pn544_i2c_fw_secure_blob {
 #define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0
 #define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6
 
-#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
-
 #define PN544_FW_WRITE_BUFFER_MAX_LEN 0x9f7
 #define PN544_FW_I2C_MAX_PAYLOAD PN544_HCI_I2C_LLC_MAX_SIZE
 #define PN544_FW_I2C_WRITE_FRAME_HEADER_LEN 8
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 336dee9485d4..3c27d6b66bb4 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -757,7 +757,6 @@ static union acpi_object *__call_snc_method(acpi_handle handle, char *method,
 	return result;
 }
 
-#define MIN(a, b)	(a > b ? b : a)
 static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
 		void *buffer, size_t buflen)
 {
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index bd73f6925a9d..73144b2966ba 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -65,11 +65,7 @@
 #include "task.h"
 #include "probe_roms.h"
 
-#define MAJ 1
-#define MIN 2
-#define BUILD 0
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
-	__stringify(BUILD)
+#define DRV_VERSION "1.2.0"
 
 MODULE_VERSION(DRV_VERSION);
 
diff --git a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
index a444ec14ff9d..1c17a87a8572 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
@@ -31,11 +31,6 @@
 /* A => B */
 #define IMPLIES(a, b)        (!(a) || (b))
 
-/* for preprocessor and array sizing use MIN and MAX
-   otherwise use min and max */
-#define MAX(a, b)            (((a) > (b)) ? (a) : (b))
-#define MIN(a, b)            (((a) < (b)) ? (a) : (b))
-
 #define ROUND_DIV(a, b)      (((b) != 0) ? ((a) + ((b) >> 1)) / (b) : 0)
 #define CEIL_DIV(a, b)       (((b) != 0) ? ((a) + (b) - 1) / (b) : 0)
 #define CEIL_MUL(a, b)       (CEIL_DIV(a, b) * (b))
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 9c2848abc804..fc384714da45 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -277,6 +277,8 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
+#define MIN(a,b) __cmp(min,a,b)
+#define MAX(a,b) __cmp(max,a,b)
 #define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
 #define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
 
diff --git a/kernel/trace/preemptirq_delay_test.c b/kernel/trace/preemptirq_delay_test.c
index 8af92dbe98f0..acb0c971a408 100644
--- a/kernel/trace/preemptirq_delay_test.c
+++ b/kernel/trace/preemptirq_delay_test.c
@@ -34,8 +34,6 @@ MODULE_PARM_DESC(cpu_affinity, "Cpu num test is running on");
 
 static struct completion done;
 
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
 static void busy_wait(ulong time)
 {
 	u64 start, end;
diff --git a/lib/btree.c b/lib/btree.c
index b4cf08a5c267..b12f99d4c45c 100644
--- a/lib/btree.c
+++ b/lib/btree.c
@@ -43,7 +43,6 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define NODESIZE MAX(L1_CACHE_BYTES, 128)
 
 struct btree_geo {
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 20a858031f12..9d34d35908da 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -37,7 +37,9 @@
 
 #include <linux/decompress/mm.h>
 
+#ifndef MIN
 #define	MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
 
 static long long INIT read_int(unsigned char *ptr, int size)
 {
diff --git a/lib/zstd/zstd_internal.h b/lib/zstd/zstd_internal.h
index dac753397f86..927ed4e8c11c 100644
--- a/lib/zstd/zstd_internal.h
+++ b/lib/zstd/zstd_internal.h
@@ -36,8 +36,6 @@
 /*-*************************************
 *  shared macros
 ***************************************/
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define CHECK_F(f)                       \
 	{                                \
 		size_t const errcod = f; \
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 79f389d620c9..fd01f6922874 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -126,7 +126,6 @@
 #define ISOLATED_BITS	3
 #define MAGIC_VAL_BITS	8
 
-#define MAX(a, b) ((a) >= (b) ? (a) : (b))
 /* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */
 #define ZS_MIN_ALLOC_SIZE \
 	MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS))
diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c
index 58775dab3cc6..92fb74865f26 100644
--- a/tools/testing/selftests/vm/mremap_test.c
+++ b/tools/testing/selftests/vm/mremap_test.c
@@ -22,7 +22,9 @@
 #define VALIDATION_DEFAULT_THRESHOLD 4	/* 4MB */
 #define VALIDATION_NO_THRESHOLD 0	/* Verify the entire region */
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 struct config {
 	unsigned long long src_alignment;
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, David Laight <[email-masked]>
Subject: [PATCH v2 05/19 5.15.y] minmax: avoid overly complicated constant expressions in VM code
Date: Fri, 3 Oct 2025 12:59:52 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 3a7e02c040b130b5545e4b115aada7bacd80a2b6 ]

The minmax infrastructure is overkill for simple constants, and can
cause huge expansions because those simple constants are then used by
other things.

For example, 'pageblock_order' is a core VM constant, but because it was
implemented using 'min_t()' and all the type-checking that involves, it
actually expanded to something like 2.5kB of preprocessor noise.

And when that simple constant was then used inside other expansions:

  #define pageblock_nr_pages      (1UL << pageblock_order)
  #define pageblock_start_pfn(pfn)  ALIGN_DOWN((pfn), pageblock_nr_pages)

and we then use that inside a 'max()' macro:

	case ISOLATE_SUCCESS:
		update_cached = false;
		last_migrated_pfn = max(cc->zone->zone_start_pfn,
			pageblock_start_pfn(cc->migrate_pfn - 1));

the end result was that one statement expanding to 253kB in size.

There are probably other cases of this, but this one case certainly
stood out.

I've added 'MIN_T()' and 'MAX_T()' macros for this kind of "core simple
constant with specific type" use.  These macros skip the type checking,
and as such need to be very sparingly used only for obvious cases that
have active issues like this.

Reported-by: Lorenzo Stoakes <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2ec559284a9f..a7ef65f78933 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -270,4 +270,11 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
 #define swap(a, b) \
 	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
 
+/*
+ * Use these carefully: no type checking, and uses the arguments
+ * multiple times. Use for obvious constants only.
+ */
+#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
+#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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Subject: [PATCH v2 06/19 5.15.y] minmax: add a few more MIN_T/MAX_T users
Date: Fri, 3 Oct 2025 12:59:53 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 4477b39c32fdc03363affef4b11d48391e6dc9ff ]

Commit 3a7e02c040b1 ("minmax: avoid overly complicated constant
expressions in VM code") added the simpler MIN_T/MAX_T macros in order
to avoid some excessive expansion from the rather complicated regular
min/max macros.

The complexity of those macros stems from two issues:

 (a) trying to use them in situations that require a C constant
     expression (in static initializers and for array sizes)

 (b) the type sanity checking

and MIN_T/MAX_T avoids both of these issues.

Now, in the whole (long) discussion about all this, it was pointed out
that the whole type sanity checking is entirely unnecessary for
min_t/max_t which get a fixed type that the comparison is done in.

But that still leaves min_t/max_t unnecessarily complicated due to
worries about the C constant expression case.

However, it turns out that there really aren't very many cases that use
min_t/max_t for this, and we can just force-convert those.

This does exactly that.

Which in turn will then allow for much simpler implementations of
min_t()/max_t().  All the usual "macros in all upper case will evaluate
the arguments multiple times" rules apply.

We should do all the same things for the regular min/max() vs MIN/MAX()
cases, but that has the added complexity of various drivers defining
their own local versions of MIN/MAX, so that needs another level of
fixes first.

Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
V1 -> V2:
Use `[ Upstream commit <HASH> ]` instead of `commit <HASH> upstream.`
like in all other patches.

 arch/x86/mm/pgtable.c                             | 2 +-
 drivers/edac/sb_edac.c                            | 4 ++--
 drivers/gpu/drm/drm_color_mgmt.c                  | 2 +-
 drivers/md/dm-integrity.c                         | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 net/ipv4/proc.c                                   | 2 +-
 net/ipv6/proc.c                                   | 2 +-
 7 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 3481b35cb4ec..e649161eb6fc 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -107,7 +107,7 @@ static inline void pgd_list_del(pgd_t *pgd)
 #define UNSHARED_PTRS_PER_PGD				\
 	(SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)
 #define MAX_UNSHARED_PTRS_PER_PGD			\
-	max_t(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)
+	MAX_T(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)

 static void pgd_set_mm(pgd_t *pgd, struct mm_struct *mm)
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 1522d4aa2ca6..714020e7405a 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -109,8 +109,8 @@ static const u32 knl_interleave_list[] = {
 	0x104, 0x10c, 0x114, 0x11c,   /* 20-23 */
 };
 #define MAX_INTERLEAVE							\
-	(max_t(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
-	       max_t(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
+	(MAX_T(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
+	       MAX_T(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
 		     ARRAY_SIZE(knl_interleave_list))))
 
 struct interleave_pkg {
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index bb14f488c8f6..1ff572d8744e 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -528,7 +528,7 @@ int drm_plane_create_color_properties(struct drm_plane *plane,
 {
 	struct drm_device *dev = plane->dev;
 	struct drm_property *prop;
-	struct drm_prop_enum_list enum_list[max_t(int, DRM_COLOR_ENCODING_MAX,
+	struct drm_prop_enum_list enum_list[MAX_T(int, DRM_COLOR_ENCODING_MAX,
 						       DRM_COLOR_RANGE_MAX)];
 	int i, len;
 
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e9d553eea9cd..8e2b00536c3e 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2536,7 +2536,7 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
 				    unlikely(from_replay) &&
 #endif
 				    ic->internal_hash) {
-					char test_tag[max_t(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+					char test_tag[MAX_T(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 
 					integrity_sector_checksum(ic, sec + ((l - j) << ic->sb->log2_sectors_per_block),
 								  (char *)access_journal_data(ic, i, l), test_tag);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 2478caeec763..21cc8cd9e023 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2805,7 +2805,7 @@ static void stmmac_dma_interrupt(struct stmmac_priv *priv)
 	u32 channels_to_check = tx_channel_count > rx_channel_count ?
 				tx_channel_count : rx_channel_count;
 	u32 chan;
-	int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
+	int status[MAX_T(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
 
 	/* Make sure we never check beyond our status buffer. */
 	if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status)))
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 4b9280a3b673..d849f61b7519 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -43,7 +43,7 @@
 #include <net/sock.h>
 #include <net/raw.h>
 
-#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
+#define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX)
 
 /*
  *	Report socket allocation statistics [[email-masked]]
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index d6306aa46bb1..e07c43bd5cb0 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -27,7 +27,7 @@
 #include <net/ipv6.h>
 
 #define MAX4(a, b, c, d) \
-	max_t(u32, max_t(u32, a, b), max_t(u32, c, d))
+	MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d))
 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
 			IPSTATS_MIB_MAX, ICMP_MIB_MAX)
 
-- 
2.47.3

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CC: Christoph Hellwig <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Linus Torvalds <[email-masked]>
Subject: [PATCH v2 04/19 5.15.y] minmax: fix indentation of __cmp_once() and __clamp_once()
Date: Fri, 3 Oct 2025 12:59:51 +0000
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From: David Laight <[email-masked]>

[ Upstream commit f4b84b2ff851f01d0fac619eadef47eb41648534 ]

Remove the extra indentation and align continuation markers.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Linus Torvalds <[email-masked]>
Cc: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 62b0c0a3cf30..2ec559284a9f 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,11 +46,11 @@
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
 #define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-		typeof(x) unique_x = (x);		\
-		typeof(y) unique_y = (y);		\
-		static_assert(__types_ok(x, y),		\
-			#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-		__cmp(op, unique_x, unique_y); })
+	typeof(x) unique_x = (x);			\
+	typeof(y) unique_y = (y);			\
+	static_assert(__types_ok(x, y),			\
+		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	__cmp(op, unique_x, unique_y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
@@ -60,16 +60,16 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({	\
-		typeof(val) unique_val = (val);				\
-		typeof(lo) unique_lo = (lo);				\
-		typeof(hi) unique_hi = (hi);				\
-		static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-				(lo) <= (hi), true),					\
-			"clamp() low limit " #lo " greater than high limit " #hi);	\
-		static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-		static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-		__clamp(unique_val, unique_lo, unique_hi); })
+#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
+	typeof(val) unique_val = (val);						\
+	typeof(lo) unique_lo = (lo);						\
+	typeof(hi) unique_hi = (hi);						\
+	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
+			(lo) <= (hi), true),					\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
+	__clamp(unique_val, unique_lo, unique_hi); })
 
 #define __careful_clamp(val, lo, hi) ({					\
 	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-- 
2.47.3

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Subject: [PATCH v2 03/19 5.15.y] minmax: deduplicate __unconst_integer_typeof()
Date: Fri, 3 Oct 2025 12:59:50 +0000
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From: Andy Shevchenko <[email-masked]>

[ Upstream commit 5e57418a2031cd5e1863efdf3d7447a16a368172 ]

It appears that compiler_types.h already have an implementation of the
__unconst_integer_typeof() called __unqual_scalar_typeof().  Use it
instead of the copy.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Andy Shevchenko <[email-masked]>
Acked-by: Herve Codina <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 25 ++-----------------------
 1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index aac0b7d23768..62b0c0a3cf30 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,27 +168,6 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
-/*
- * Remove a const qualifier from integer types
- * _Generic(foo, type-name: association, ..., default: association) performs a
- * comparison against the foo type (not the qualified type).
- * Do not use the const keyword in the type-name as it will not match the
- * unqualified type of foo.
- */
-#define __unconst_integer_type_cases(type)	\
-	unsigned type:  (unsigned type)0,	\
-	signed type:    (signed type)0
-
-#define __unconst_integer_typeof(x) typeof(			\
-	_Generic((x),						\
-		char: (char)0,					\
-		__unconst_integer_type_cases(char),		\
-		__unconst_integer_type_cases(short),		\
-		__unconst_integer_type_cases(int),		\
-		__unconst_integer_type_cases(long),		\
-		__unconst_integer_type_cases(long long),	\
-		default: (x)))
-
 /*
  * Do not check the array parameter using __must_be_array().
  * In the following legit use-case where the "array" passed is a simple pointer,
@@ -203,13 +182,13 @@
  * 'int *buff' and 'int buff[N]' types.
  *
  * The array can be an array of const items.
- * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * typeof() keeps the const qualifier. Use __unqual_scalar_typeof() in order
  * to discard the const qualifier for the __element variable.
  */
 #define __minmax_array(op, array, len) ({				\
 	typeof(&(array)[0]) __array = (array);				\
 	typeof(len) __len = (len);					\
-	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	__unqual_scalar_typeof(__array[0]) __element = __array[--__len];\
 	while (__len--)							\
 		__element = op(__element, __array[__len]);		\
 	__element; })
-- 
2.47.3

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CC: Andy Shevchenko <[email-masked]>, Christophe Leroy
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Subject: [PATCH v2 02/19 5.15.y] minmax: Introduce {min,max}_array()
Date: Fri, 3 Oct 2025 12:59:49 +0000
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From: Herve Codina <[email-masked]>

[ Upstream commit c952c748c7a983a8bda9112984e6f2c1f6e441a5 ]

Introduce min_array() (resp max_array()) in order to get the
minimal (resp maximum) of values present in an array.

Signed-off-by: Herve Codina <[email-masked]>
Reviewed-by: Andy Shevchenko <[email-masked]>
Reviewed-by: Christophe Leroy <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Mark Brown <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index d4bc394b449e..aac0b7d23768 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,6 +168,70 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
+/*
+ * Remove a const qualifier from integer types
+ * _Generic(foo, type-name: association, ..., default: association) performs a
+ * comparison against the foo type (not the qualified type).
+ * Do not use the const keyword in the type-name as it will not match the
+ * unqualified type of foo.
+ */
+#define __unconst_integer_type_cases(type)	\
+	unsigned type:  (unsigned type)0,	\
+	signed type:    (signed type)0
+
+#define __unconst_integer_typeof(x) typeof(			\
+	_Generic((x),						\
+		char: (char)0,					\
+		__unconst_integer_type_cases(char),		\
+		__unconst_integer_type_cases(short),		\
+		__unconst_integer_type_cases(int),		\
+		__unconst_integer_type_cases(long),		\
+		__unconst_integer_type_cases(long long),	\
+		default: (x)))
+
+/*
+ * Do not check the array parameter using __must_be_array().
+ * In the following legit use-case where the "array" passed is a simple pointer,
+ * __must_be_array() will return a failure.
+ * --- 8< ---
+ * int *buff
+ * ...
+ * min = min_array(buff, nb_items);
+ * --- 8< ---
+ *
+ * The first typeof(&(array)[0]) is needed in order to support arrays of both
+ * 'int *buff' and 'int buff[N]' types.
+ *
+ * The array can be an array of const items.
+ * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * to discard the const qualifier for the __element variable.
+ */
+#define __minmax_array(op, array, len) ({				\
+	typeof(&(array)[0]) __array = (array);				\
+	typeof(len) __len = (len);					\
+	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	while (__len--)							\
+		__element = op(__element, __array[__len]);		\
+	__element; })
+
+/**
+ * min_array - return minimum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define min_array(array, len) __minmax_array(min, array, len)
+
+/**
+ * max_array - return maximum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define max_array(array, len) __minmax_array(max, array, len)
+
 /**
  * clamp_t - return a value clamped to a given range using a given type
  * @type: the type of variable to use
-- 
2.47.3

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Subject: [PATCH v2 00/19 5.15.y] Backport minmax.h updates from v6.17-rc7
Date: Fri, 3 Oct 2025 12:59:47 +0000
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This series backports 19 patches to update minmax.h in the 5.15.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes (6.12.y and 6.6.y were already
backported by me and are now aligned, 6.1.y is in progress).

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in kernel 5.10.y.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Changes in v2:
- Fix the order of patches 6 - 10 according to order in mainline branch.
- Use same style of [ Upstream commit <HASH> ] in all patches.

Andy Shevchenko (1):
  minmax: deduplicate __unconst_integer_typeof()

David Laight (8):
  minmax: fix indentation of __cmp_once() and __clamp_once()
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Herve Codina (1):
  minmax: Introduce {min,max}_array()

Linus Torvalds (8):
  minmax: avoid overly complicated constant expressions in VM code
  minmax: add a few more MIN_T/MAX_T users
  minmax: simplify and clarify min_t()/max_t() implementation
  minmax: make generic MIN() and MAX() macros available everywhere
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: simplify min()/max()/clamp() implementation
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

Matthew Wilcox (Oracle) (1):
  minmax: add in_range() macro

 arch/arm/mm/pageattr.c                        |   6 +-
 arch/um/drivers/mconsole_user.c               |   2 +
 arch/x86/mm/pgtable.c                         |   2 +-
 drivers/edac/sb_edac.c                        |   4 +-
 drivers/edac/skx_common.h                     |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |   2 +
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |   2 +
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    |  14 +-
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |   2 +
 .../drm/arm/display/include/malidp_utils.h    |   2 +-
 .../display/komeda/komeda_pipeline_state.c    |  24 +-
 drivers/gpu/drm/drm_color_mgmt.c              |   2 +-
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |   6 -
 drivers/gpu/drm/radeon/evergreen_cs.c         |   2 +
 drivers/hwmon/adt7475.c                       |  24 +-
 drivers/input/touchscreen/cyttsp4_core.c      |   2 +-
 drivers/irqchip/irq-sun6i-r.c                 |   2 +-
 drivers/md/dm-integrity.c                     |   4 +-
 drivers/media/dvb-frontends/stv0367_priv.h    |   3 +
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   |  18 +-
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   2 +-
 drivers/net/fjes/fjes_main.c                  |   4 +-
 drivers/nfc/pn544/i2c.c                       |   2 -
 drivers/platform/x86/sony-laptop.c            |   1 -
 drivers/scsi/isci/init.c                      |   6 +-
 .../pci/hive_isp_css_include/math_support.h   |   5 -
 drivers/virt/acrn/ioreq.c                     |   4 +-
 fs/btrfs/misc.h                               |   2 -
 fs/btrfs/tree-checker.c                       |   2 +-
 fs/ext2/balloc.c                              |   2 -
 fs/ext4/ext4.h                                |   2 -
 fs/ufs/util.h                                 |   6 -
 include/linux/compiler.h                      |   9 +
 include/linux/minmax.h                        | 264 +++++++++++++-----
 kernel/trace/preemptirq_delay_test.c          |   2 -
 lib/btree.c                                   |   1 -
 lib/decompress_unlzma.c                       |   2 +
 lib/logic_pio.c                               |   3 -
 lib/vsprintf.c                                |   2 +-
 lib/zstd/zstd_internal.h                      |   2 -
 mm/zsmalloc.c                                 |   1 -
 net/ipv4/proc.c                               |   2 +-
 net/ipv6/proc.c                               |   2 +-
 net/netfilter/nf_nat_core.c                   |   6 +-
 net/tipc/core.h                               |   2 +-
 net/tipc/link.c                               |  10 +-
 tools/testing/selftests/vm/mremap_test.c      |   2 +
 47 files changed, 289 insertions(+), 183 deletions(-)

-- 
2.47.3

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Subject: [PATCH v2 01/19 5.15.y] minmax: add in_range() macro
Date: Fri, 3 Oct 2025 12:59:48 +0000
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From: "Matthew Wilcox (Oracle)" <[email-masked]>

[ Upstream commit f9bff0e31881d03badf191d3b0005839391f5f2b ]

Patch series "New page table range API", v6.

This patchset changes the API used by the MM to set up page table entries.
The four APIs are:

    set_ptes(mm, addr, ptep, pte, nr)
    update_mmu_cache_range(vma, addr, ptep, nr)
    flush_dcache_folio(folio)
    flush_icache_pages(vma, page, nr)

flush_dcache_folio() isn't technically new, but no architecture
implemented it, so I've done that for them.  The old APIs remain around
but are mostly implemented by calling the new interfaces.

The new APIs are based around setting up N page table entries at once.
The N entries belong to the same PMD, the same folio and the same VMA, so
ptep++ is a legitimate operation, and locking is taken care of for you.
Some architectures can do a better job of it than just a loop, but I have
hesitated to make too deep a change to architectures I don't understand
well.

One thing I have changed in every architecture is that PG_arch_1 is now a
per-folio bit instead of a per-page bit when used for dcache clean/dirty
tracking.  This was something that would have to happen eventually, and it
makes sense to do it now rather than iterate over every page involved in a
cache flush and figure out if it needs to happen.

The point of all this is better performance, and Fengwei Yin has measured
improvement on x86.  I suspect you'll see improvement on your architecture
too.  Try the new will-it-scale test mentioned here:
https://lore.kernel.org/linux-mm/[email-masked]/
You'll need to run it on an XFS filesystem and have
CONFIG_TRANSPARENT_HUGEPAGE set.

This patchset is the basis for much of the anonymous large folio work
being done by Ryan, so it's received quite a lot of testing over the last
few months.

This patch (of 38):

Determine if a value lies within a range more efficiently (subtraction +
comparison vs two comparisons and an AND).  It also has useful (under some
circumstances) behaviour if the range exceeds the maximum value of the
type.  Convert all the conflicting definitions of in_range() within the
kernel; some can use the generic definition while others need their own
definition.

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/arm/mm/pageattr.c                        |  6 ++---
 .../drm/arm/display/include/malidp_utils.h    |  2 +-
 .../display/komeda/komeda_pipeline_state.c    | 24 ++++++++---------
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |  6 -----
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   | 18 ++++++-------
 drivers/virt/acrn/ioreq.c                     |  4 +--
 fs/btrfs/misc.h                               |  2 --
 fs/ext2/balloc.c                              |  2 --
 fs/ext4/ext4.h                                |  2 --
 fs/ufs/util.h                                 |  6 -----
 include/linux/minmax.h                        | 27 +++++++++++++++++++
 lib/logic_pio.c                               |  3 ---
 net/netfilter/nf_nat_core.c                   |  6 ++---
 net/tipc/core.h                               |  2 +-
 net/tipc/link.c                               | 10 +++----
 15 files changed, 63 insertions(+), 57 deletions(-)

diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
index 9790ae3a8c68..3b3bfa825fad 100644
--- a/arch/arm/mm/pageattr.c
+++ b/arch/arm/mm/pageattr.c
@@ -25,7 +25,7 @@ static int change_page_range(pte_t *ptep, unsigned long addr, void *data)
 	return 0;
 }
 
-static bool in_range(unsigned long start, unsigned long size,
+static bool range_in_range(unsigned long start, unsigned long size,
 	unsigned long range_start, unsigned long range_end)
 {
 	return start >= range_start && start < range_end &&
@@ -46,8 +46,8 @@ static int change_memory_common(unsigned long addr, int numpages,
 	if (!size)
 		return 0;
 
-	if (!in_range(start, size, MODULES_VADDR, MODULES_END) &&
-	    !in_range(start, size, VMALLOC_START, VMALLOC_END))
+	if (!range_in_range(start, size, MODULES_VADDR, MODULES_END) &&
+	    !range_in_range(start, size, VMALLOC_START, VMALLOC_END))
 		return -EINVAL;
 
 	data.set_mask = set_mask;
diff --git a/drivers/gpu/drm/arm/display/include/malidp_utils.h b/drivers/gpu/drm/arm/display/include/malidp_utils.h
index 49a1d7f3539c..9f83baac6ed8 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_utils.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h
@@ -35,7 +35,7 @@ static inline void set_range(struct malidp_range *rg, u32 start, u32 end)
 	rg->end   = end;
 }
 
-static inline bool in_range(struct malidp_range *rg, u32 v)
+static inline bool malidp_in_range(struct malidp_range *rg, u32 v)
 {
 	return (v >= rg->start) && (v <= rg->end);
 }
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
index c956fda918be..4aa527ca765b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -305,12 +305,12 @@ komeda_layer_check_cfg(struct komeda_layer *layer,
 	if (komeda_fb_check_src_coords(kfb, src_x, src_y, src_w, src_h))
 		return -EINVAL;
 
-	if (!in_range(&layer->hsize_in, src_w)) {
+	if (!malidp_in_range(&layer->hsize_in, src_w)) {
 		DRM_DEBUG_ATOMIC("invalidate src_w %d.\n", src_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&layer->vsize_in, src_h)) {
+	if (!malidp_in_range(&layer->vsize_in, src_h)) {
 		DRM_DEBUG_ATOMIC("invalidate src_h %d.\n", src_h);
 		return -EINVAL;
 	}
@@ -452,14 +452,14 @@ komeda_scaler_check_cfg(struct komeda_scaler *scaler,
 	hsize_out = dflow->out_w;
 	vsize_out = dflow->out_h;
 
-	if (!in_range(&scaler->hsize, hsize_in) ||
-	    !in_range(&scaler->hsize, hsize_out)) {
+	if (!malidp_in_range(&scaler->hsize, hsize_in) ||
+	    !malidp_in_range(&scaler->hsize, hsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid horizontal sizes");
 		return -EINVAL;
 	}
 
-	if (!in_range(&scaler->vsize, vsize_in) ||
-	    !in_range(&scaler->vsize, vsize_out)) {
+	if (!malidp_in_range(&scaler->vsize, vsize_in) ||
+	    !malidp_in_range(&scaler->vsize, vsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid vertical sizes");
 		return -EINVAL;
 	}
@@ -574,13 +574,13 @@ komeda_splitter_validate(struct komeda_splitter *splitter,
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->hsize, dflow->in_w)) {
+	if (!malidp_in_range(&splitter->hsize, dflow->in_w)) {
 		DRM_DEBUG_ATOMIC("split in_w:%d is out of the acceptable range.\n",
 				 dflow->in_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->vsize, dflow->in_h)) {
+	if (!malidp_in_range(&splitter->vsize, dflow->in_h)) {
 		DRM_DEBUG_ATOMIC("split in_h: %d exceeds the acceptable range.\n",
 				 dflow->in_h);
 		return -EINVAL;
@@ -624,13 +624,13 @@ komeda_merger_validate(struct komeda_merger *merger,
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->hsize_merged, output->out_w)) {
+	if (!malidp_in_range(&merger->hsize_merged, output->out_w)) {
 		DRM_DEBUG_ATOMIC("merged_w: %d is out of the accepted range.\n",
 				 output->out_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->vsize_merged, output->out_h)) {
+	if (!malidp_in_range(&merger->vsize_merged, output->out_h)) {
 		DRM_DEBUG_ATOMIC("merged_h: %d is out of the accepted range.\n",
 				 output->out_h);
 		return -EINVAL;
@@ -866,8 +866,8 @@ void komeda_complete_data_flow_cfg(struct komeda_layer *layer,
 	 * input/output range.
 	 */
 	if (dflow->en_scaling && scaler)
-		dflow->en_split = !in_range(&scaler->hsize, dflow->in_w) ||
-				  !in_range(&scaler->hsize, dflow->out_w);
+		dflow->en_split = !malidp_in_range(&scaler->hsize, dflow->in_w) ||
+				  !malidp_in_range(&scaler->hsize, dflow->out_w);
 }
 
 static bool merger_is_available(struct komeda_pipeline *pipe,
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index f1daa923f346..9215322fc915 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -676,12 +676,6 @@ struct block_header {
 	u32 data[];
 };
 
-/* this should be a general kernel helper */
-static int in_range(u32 addr, u32 start, u32 size)
-{
-	return addr >= start && addr < start + size;
-}
-
 static bool fw_block_mem(struct a6xx_gmu_bo *bo, const struct block_header *blk)
 {
 	if (!in_range(blk->addr, bo->iova, bo->size))
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 07568aa15873..3c3d8ffc3c8b 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -2135,7 +2135,7 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
 	.set_link_ksettings = set_link_ksettings,
 };
 
-static int in_range(int val, int lo, int hi)
+static int cxgb_in_range(int val, int lo, int hi)
 {
 	return val < 0 || (val <= hi && val >= lo);
 }
@@ -2171,19 +2171,19 @@ static int cxgb_siocdevprivate(struct net_device *dev,
 			return -EINVAL;
 		if (t.qset_idx >= SGE_QSETS)
 			return -EINVAL;
-		if (!in_range(t.intr_lat, 0, M_NEWTIMER) ||
-		    !in_range(t.cong_thres, 0, 255) ||
-		    !in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
+		if (!cxgb_in_range(t.intr_lat, 0, M_NEWTIMER) ||
+		    !cxgb_in_range(t.cong_thres, 0, 255) ||
+		    !cxgb_in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
 			      MAX_CTRL_TXQ_ENTRIES) ||
-		    !in_range(t.fl_size[0], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[0], MIN_FL_ENTRIES,
 			      MAX_RX_BUFFERS) ||
-		    !in_range(t.fl_size[1], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[1], MIN_FL_ENTRIES,
 			      MAX_RX_JUMBO_BUFFERS) ||
-		    !in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
+		    !cxgb_in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
 			      MAX_RSPQ_ENTRIES))
 			return -EINVAL;
 
diff --git a/drivers/virt/acrn/ioreq.c b/drivers/virt/acrn/ioreq.c
index 80b2e3f0e276..5446e5bbbff8 100644
--- a/drivers/virt/acrn/ioreq.c
+++ b/drivers/virt/acrn/ioreq.c
@@ -356,7 +356,7 @@ static bool handle_cf8cfc(struct acrn_vm *vm,
 	return is_handled;
 }
 
-static bool in_range(struct acrn_ioreq_range *range,
+static bool acrn_in_range(struct acrn_ioreq_range *range,
 		     struct acrn_io_request *req)
 {
 	bool ret = false;
@@ -394,7 +394,7 @@ static struct acrn_ioreq_client *find_ioreq_client(struct acrn_vm *vm,
 	list_for_each_entry(client, &vm->ioreq_clients, list) {
 		read_lock_bh(&client->range_lock);
 		list_for_each_entry(range, &client->range_list, list) {
-			if (in_range(range, req)) {
+			if (acrn_in_range(range, req)) {
 				found = client;
 				break;
 			}
diff --git a/fs/btrfs/misc.h b/fs/btrfs/misc.h
index 340f995652f2..5269923c8a7d 100644
--- a/fs/btrfs/misc.h
+++ b/fs/btrfs/misc.h
@@ -8,8 +8,6 @@
 #include <linux/math64.h>
 #include <linux/rbtree.h>
 
-#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
-
 static inline void cond_wake_up(struct wait_queue_head *wq)
 {
 	/*
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9bf086821eb3..1d9380c5523b 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -36,8 +36,6 @@
  */

-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
 					     unsigned int block_group,
 					     struct buffer_head ** bh)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ed477af15b6b..3e5c91e8b036 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3830,8 +3830,6 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
 	set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
 }
 
-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 /* For ioend & aio unwritten conversion wait queues */
 #define EXT4_WQ_HASH_SZ		37
 #define ext4_ioend_wq(v)   (&ext4__ioend_wq[((unsigned long)(v)) %\
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 4931bec1a01c..89247193d96d 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -11,12 +11,6 @@
 #include <linux/fs.h>
 #include "swab.h"
 
-
-/*
- * some useful macros
- */
-#define in_range(b,first,len)	((b)>=(first)&&(b)<(first)+(len))
-
 /*
  * functions used for retyping
  */
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index dd52969698f7..d4bc394b449e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -5,6 +5,7 @@
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
 #include <linux/const.h>
+#include <linux/types.h>
 
 /*
  * min()/max()/clamp() macros must accomplish three things:
@@ -192,6 +193,32 @@
  */
 #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
+static inline bool in_range64(u64 val, u64 start, u64 len)
+{
+	return (val - start) < len;
+}
+
+static inline bool in_range32(u32 val, u32 start, u32 len)
+{
+	return (val - start) < len;
+}
+
+/**
+ * in_range - Determine if a value lies within a range.
+ * @val: Value to test.
+ * @start: First value in range.
+ * @len: Number of values in range.
+ *
+ * This is more efficient than "if (start <= val && val < (start + len))".
+ * It also gives a different answer if @start + @len overflows the size of
+ * the type by a sufficient amount to encompass @val.  Decide for yourself
+ * which behaviour you want, or prove that start + len never overflow.
+ * Do not blindly replace one form with the other.
+ */
+#define in_range(val, start, len)					\
+	((sizeof(start) | sizeof(len) | sizeof(val)) <= sizeof(u32) ?	\
+		in_range32(val, start, len) : in_range64(val, start, len))
+
 /**
  * swap - swap values of @a and @b
  * @a: first value
diff --git a/lib/logic_pio.c b/lib/logic_pio.c
index 07b4b9a1f54b..2ea564a40064 100644
--- a/lib/logic_pio.c
+++ b/lib/logic_pio.c
@@ -20,9 +20,6 @@
 static LIST_HEAD(io_range_list);
 static DEFINE_MUTEX(io_range_mutex);
 
-/* Consider a kernel general helper for this */
-#define in_range(b, first, len)        ((b) >= (first) && (b) < (first) + (len))
-
 /**
  * logic_pio_register_range - register logical PIO range for a host
  * @new_range: pointer to the IO range to be registered.
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index b776b3af78ca..1dd160b84d05 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -242,7 +242,7 @@ static bool l4proto_in_range(const struct nf_conntrack_tuple *tuple,
 /* If we source map this tuple so reply looks like reply_tuple, will
  * that meet the constraints of range.
  */
-static int in_range(const struct nf_conntrack_tuple *tuple,
+static int nf_in_range(const struct nf_conntrack_tuple *tuple,
 		    const struct nf_nat_range2 *range)
 {
 	/* If we are supposed to map IPs, then we must be in the
@@ -291,7 +291,7 @@ find_appropriate_src(struct net *net,
 				       &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
 			result->dst = tuple->dst;
 
-			if (in_range(result, range))
+			if (nf_in_range(result, range))
 				return 1;
 		}
 	}
@@ -523,7 +523,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
 	if (maniptype == NF_NAT_MANIP_SRC &&
 	    !(range->flags & NF_NAT_RANGE_PROTO_RANDOM_ALL)) {
 		/* try the original tuple first */
-		if (in_range(orig_tuple, range)) {
+		if (nf_in_range(orig_tuple, range)) {
 			if (!nf_nat_used_tuple(orig_tuple, ct)) {
 				*tuple = *orig_tuple;
 				return;
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 0a3f7a70a50a..7eccd97e0609 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -197,7 +197,7 @@ static inline int less(u16 left, u16 right)
 	return less_eq(left, right) && (mod(right) != mod(left));
 }
 
-static inline int in_range(u16 val, u16 min, u16 max)
+static inline int tipc_in_range(u16 val, u16 min, u16 max)
 {
 	return !less(val, min) && !more(val, max);
 }
diff --git a/net/tipc/link.c b/net/tipc/link.c
index b098b74516d1..c8433ec7661d 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1623,7 +1623,7 @@ static int tipc_link_advance_transmq(struct tipc_link *l, struct tipc_link *r,
 					  last_ga->bgack_cnt);
 			}
 			/* Check against the last Gap ACK block */
-			if (in_range(seqno, start, end))
+			if (tipc_in_range(seqno, start, end))
 				continue;
 			/* Update/release the packet peer is acking */
 			bc_has_acked = true;
@@ -2251,12 +2251,12 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		strncpy(if_name, data, TIPC_MAX_IF_NAME);
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own priority if peer's priority is higher */
-		if (in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
+		if (tipc_in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
 			l->priority = peers_prio;
 
 		/* If peer is going down we want full re-establish cycle */
@@ -2299,13 +2299,13 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		l->rcv_nxt_state = msg_seqno(hdr) + 1;
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own prio if peer indicates a different value */
 		if ((peers_prio != l->priority) &&
-		    in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
+		    tipc_in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
 			l->priority = peers_prio;
 			rc = tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
 		}
-- 
2.47.3

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Subject: [PATCH v4 10/11 6.1.y] minmax.h: simplify the variants of clamp()
Date: Fri, 3 Oct 2025 12:15:19 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ]

Always pass a 'type' through to __clamp_once(), pass '__auto_type' from
clamp() itself.

The expansion of __types_ok3() is reasonable so it isn't worth the added
complexity of avoiding it when a fixed type is used for all three values.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 75fb7a6ad4c6..2bbdd5b5e07e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -183,29 +183,29 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
+#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({			\
+	type uval = (val);							\
+	type ulo = (lo);							\
+	type uhi = (hi);							\
 	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+#define __careful_clamp(type, val, lo, hi) \
+	__clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
- * clamp - return a value clamped to a given range with strict typechecking
+ * clamp - return a value clamped to a given range with typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
- * same type as @val.  See the unnecessary pointer comparisons.
+ * This macro checks @val/@lo/@hi to make sure they have compatible
+ * signedness.
  */
-#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
+#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
 
 /**
  * clamp_t - return a value clamped to a given range using a given type
@@ -217,7 +217,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
+#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
@@ -230,7 +230,7 @@
  * type and @lo and @hi are literals that will otherwise be assigned a signed
  * integer type.
  */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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Subject: [PATCH v4 11/11 6.1.y] minmax.h: remove some #defines that are only expanded once
Date: Fri, 3 Oct 2025 12:15:20 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 2b97aaf74ed534fb838d09867d09a3ca5d795208 ]

The bodies of __signed_type_use() and __unsigned_type_use() are much the
same size as their names - so put the bodies in the only line that expands
them.

Similarly __signed_type() is defined separately for 64bit and then used
exactly once just below.

Change the test for __signed_type from CONFIG_64BIT to one based on gcc
defined macros so that the code is valid if it gets used outside of a
kernel build.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2bbdd5b5e07e..eaaf5c008e4d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,8 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(ux) (2 + __is_nonneg(ux))
-#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
 #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(ux) : __unsigned_type_use(ux))
+	(2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -57,7 +55,7 @@
  * A cast is needed to avoid any warnings from values that aren't signed
  * integer types (in which case the result doesn't matter).
  *
- * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * On 64-bit any integer or pointer type can safely be cast to 'long long'.
  * But on 32-bit we need to avoid warnings about casting pointers to integers
  * of different sizes without truncating 64-bit values so 'long' or 'long long'
  * must be used depending on the size of the value.
@@ -66,12 +64,12 @@
  * them, but we do not use s128 types in the kernel (we do use 'u128',
  * but they are handled by the !is_signed_type() case).
  */
-#ifdef CONFIG_64BIT
-  #define __signed_type(ux) long
+#if __SIZEOF_POINTER__ == __SIZEOF_LONG_LONG__
+#define __is_nonneg(ux) statically_true((long long)(ux) >= 0)
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
+#define __is_nonneg(ux) statically_true( \
+	(typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
 #endif
-#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
 #define __types_ok(ux, uy) \
 	(__sign_use(ux) & __sign_use(uy))
-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
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Subject: [PATCH v4 09/11 6.1.y] minmax.h: move all the clamp() definitions after the min/max() ones
Date: Fri, 3 Oct 2025 12:15:18 +0000
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From: David Laight <[email-masked]>

[ Upstream commit c3939872ee4a6b8bdcd0e813c66823b31e6e26f7 ]

At some point the definitions for clamp() got added in the middle of the
ones for min() and max().  Re-order the definitions so they are more
sensibly grouped.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 109 +++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 58 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 91aa1b90c1bb..75fb7a6ad4c6 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -99,22 +99,6 @@
 #define __careful_cmp(op, x, y) \
 	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __clamp(val, lo, hi)	\
-	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
-	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
-		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
-		"clamp("#val", "#lo", "#hi") signedness error");		\
-	__clamp(uval, ulo, uhi); })
-
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
-
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -170,6 +154,22 @@
 #define max3(x, y, z) \
 	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
+/**
+ * min_t - return minimum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
+
+/**
+ * max_t - return maximum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
@@ -180,6 +180,22 @@
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
@@ -191,28 +207,30 @@
  */
 #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
-/*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max/clamp at all, of course.
- */
-
 /**
- * min_t - return minimum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_t - return a value clamped to a given range using a given type
+ * @type: the type of variable to use
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of type
+ * @type to make all the comparisons.
  */
-#define min_t(type, x, y) __cmp_once(min, type, x, y)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
- * max_t - return maximum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_val - return a value clamped to a given range using val's type
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of whatever
+ * type the input argument @val is.  This is useful when @val is an unsigned
+ * type and @lo and @hi are literals that will otherwise be assigned a signed
+ * integer type.
  */
-#define max_t(type, x, y) __cmp_once(max, type, x, y)
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
@@ -257,31 +275,6 @@
  */
 #define max_array(array, len) __minmax_array(max, array, len)
 
-/**
- * clamp_t - return a value clamped to a given range using a given type
- * @type: the type of variable to use
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of type
- * @type to make all the comparisons.
- */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
-
-/**
- * clamp_val - return a value clamped to a given range using val's type
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of whatever
- * type the input argument @val is.  This is useful when @val is an unsigned
- * type and @lo and @hi are literals that will otherwise be assigned a signed
- * integer type.
- */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
-
 static inline bool in_range64(u64 val, u64 start, u64 len)
 {
 	return (val - start) < len;
-- 
2.47.3

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Subject: [PATCH v4 06/11 6.1.y] minmax.h: update some comments
Date: Fri, 3 Oct 2025 12:15:15 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 10666e99204818ef45c702469488353b5bb09ec7 ]

- Change three to several.
- Remove the comment about retaining constant expressions, no longer true.
- Realign to nearer 80 columns and break on major punctiation.
- Add a leading comment to the block before __signed_type() and __is_nonneg()
  Otherwise the block explaining the cast is a bit 'floating'.
  Reword the rest of that comment to improve readability.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 53 +++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 51b0d988e322..24e4b372649a 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 
 /*
- * min()/max()/clamp() macros must accomplish three things:
+ * min()/max()/clamp() macros must accomplish several things:
  *
  * - Avoid multiple evaluations of the arguments (so side-effects like
  *   "x++" happen only once) when non-constant.
- * - Retain result as a constant expressions when called with only
- *   constant expressions (to avoid tripping VLA warnings in stack
- *   allocation usage).
  * - Perform signed v unsigned type-checking (to generate compile
  *   errors instead of nasty runtime surprises).
  * - Unsigned char/short are always promoted to signed int and can be
@@ -31,25 +28,23 @@
  *   bit #0 set if ok for unsigned comparisons
  *   bit #1 set if ok for signed comparisons
  *
- * In particular, statically non-negative signed integer
- * expressions are ok for both.
+ * In particular, statically non-negative signed integer expressions
+ * are ok for both.
  *
- * NOTE! Unsigned types smaller than 'int' are implicitly
- * converted to 'int' in expressions, and are accepted for
- * signed conversions for now. This is debatable.
+ * NOTE! Unsigned types smaller than 'int' are implicitly converted to 'int'
+ * in expressions, and are accepted for signed conversions for now.
+ * This is debatable.
  *
- * Note that 'x' is the original expression, and 'ux' is
- * the unique variable that contains the value.
+ * Note that 'x' is the original expression, and 'ux' is the unique variable
+ * that contains the value.
  *
- * We use 'ux' for pure type checking, and 'x' for when
- * we need to look at the value (but without evaluating
- * it for side effects! Careful to only ever evaluate it
- * with sizeof() or __builtin_constant_p() etc).
+ * We use 'ux' for pure type checking, and 'x' for when we need to look at the
+ * value (but without evaluating it for side effects!
+ * Careful to only ever evaluate it with sizeof() or __builtin_constant_p() etc).
  *
- * Pointers end up being checked by the normal C type
- * rules at the actual comparison, and these expressions
- * only need to be careful to not cause warnings for
- * pointer use.
+ * Pointers end up being checked by the normal C type rules at the actual
+ * comparison, and these expressions only need to be careful to not cause
+ * warnings for pointer use.
  */
 #define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
 #define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
@@ -57,19 +52,19 @@
 	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
- * To avoid warnings about casting pointers to integers
- * of different sizes, we need that special sign type.
+ * Check whether a signed value is always non-negative.
  *
- * On 64-bit we can just always use 'long', since any
- * integer or pointer type can just be cast to that.
+ * A cast is needed to avoid any warnings from values that aren't signed
+ * integer types (in which case the result doesn't matter).
  *
- * This does not work for 128-bit signed integers since
- * the cast would truncate them, but we do not use s128
- * types in the kernel (we do use 'u128', but they will
- * be handled by the !is_signed_type() case).
+ * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * But on 32-bit we need to avoid warnings about casting pointers to integers
+ * of different sizes without truncating 64-bit values so 'long' or 'long long'
+ * must be used depending on the size of the value.
  *
- * NOTE! The cast is there only to avoid any warnings
- * from when values that aren't signed integer types.
+ * This does not work for 128-bit signed integers since the cast would truncate
+ * them, but we do not use s128 types in the kernel (we do use 'u128',
+ * but they are handled by the !is_signed_type() case).
  */
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
-- 
2.47.3

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Subject: [PATCH v4 07/11 6.1.y] minmax.h: reduce the #define expansion of min(), max() and clamp()
Date: Fri, 3 Oct 2025 12:15:16 +0000
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From: David Laight <[email-masked]>

[ Upstream commit b280bb27a9f7c91ddab730e1ad91a9c18a051f41 ]

Since the test for signed values being non-negative only relies on
__builtion_constant_p() (not is_constexpr()) it can use the 'ux' variable
instead of the caller supplied expression.  This means that the #define
parameters are only expanded twice.  Once in the code and once quoted in
the error message.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 24e4b372649a..6f7ea669d305 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,10 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
-#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
-#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
+#define __signed_type_use(ux) (2 + __is_nonneg(ux))
+#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(ux) : __unsigned_type_use(ux))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -71,13 +71,13 @@
 #else
   #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
+#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
-#define __types_ok(x, y, ux, uy) \
-	(__sign_use(x, ux) & __sign_use(y, uy))
+#define __types_ok(ux, uy) \
+	(__sign_use(ux) & __sign_use(uy))
 
-#define __types_ok3(x, y, z, ux, uy, uz) \
-	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
+#define __types_ok3(ux, uy, uz) \
+	(__sign_use(ux) & __sign_use(uy) & __sign_use(uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -92,7 +92,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(ux, uy),		\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -109,7 +109,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -149,7 +149,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(ux, uy, uz),			\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
 Wilcox" <[email-masked]>, Pedro Falcato <[email-masked]>
Subject: [PATCH v4 08/11 6.1.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
Date: Fri, 3 Oct 2025 12:15:17 +0000
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From: David Laight <[email-masked]>

[ Upstream commit a5743f32baec4728711bbc01d6ac2b33d4c67040 ]

Use BUILD_BUG_ON_MSG(statically_true(ulo > uhi), ...) for the sanity check
of the bounds in clamp().  Gives better error coverage and one less
expansion of the arguments.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 6f7ea669d305..91aa1b90c1bb 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -106,8 +106,7 @@
 	__auto_type uval = (val);						\
 	__auto_type ulo = (lo);							\
 	__auto_type uhi = (hi);							\
-	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-			(lo) <= (hi), true),					\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
-- 
2.47.3

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Subject: [PATCH v4 03/11 6.1.y] minmax: improve macro expansion and type checking
Date: Fri, 3 Oct 2025 12:15:12 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 22f5468731491e53356ba7c028f0fdea20b18e2c ]

This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.

In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:

 - an expression with a signed type can be used for
    (1) signed comparisons
    (2) unsigned comparisons if it is statically known to have a
        non-negative value

 - an expression with an unsigned type can be used for
    (3) unsigned comparison
    (4) signed comparisons if the type is smaller than 'int' and thus
        the C integer promotion rules will make it signed anyway

Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.

Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel.  Notably with
bcachefs having an expression like

	min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)

where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.

Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.

However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.

But at least for now the rule is in place for backwards compatibility.

Also note that rule (2) existed before, but is hugely relaxed by this
commit.  It used to be true only for the simplest compile-time
non-negative integer constants.  The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.

For example, the amdgpu driver does

	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));

because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.

Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.

Cc: Arnd Bergmann <[email-masked]>
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/compiler.h |  9 +++++
 include/linux/minmax.h   | 74 ++++++++++++++++++++++++++++++++--------
 2 files changed, 68 insertions(+), 15 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index f6ea15821cea..a6a7be83fae6 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -244,6 +244,15 @@ static inline void *offset_to_ptr(const int *off)
  */
 #define is_signed_type(type) (((type)(-1)) < (__force type)1)
 
+/*
+ * Useful shorthand for "is this condition known at compile-time?"
+ *
+ * Note that the condition may involve non-constant values,
+ * but the compiler may know enough about the details of the
+ * values to determine that the condition is statically true.
+ */
+#define statically_true(x) (__builtin_constant_p(x) && (x))
+
 /*
  * This is needed in functions which generate the stack canary, see
  * arch/x86/kernel/smpboot.c::start_secondary() for an example.
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index e3e4353df983..41da6f85a407 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -26,19 +26,63 @@
 #define __typecheck(x, y) \
 	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
 
-/* is_signed_type() isn't a constexpr for pointer types */
-#define __is_signed(x) 								\
-	__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))),	\
-		is_signed_type(typeof(x)), 0)
+/*
+ * __sign_use for integer expressions:
+ *   bit #0 set if ok for unsigned comparisons
+ *   bit #1 set if ok for signed comparisons
+ *
+ * In particular, statically non-negative signed integer
+ * expressions are ok for both.
+ *
+ * NOTE! Unsigned types smaller than 'int' are implicitly
+ * converted to 'int' in expressions, and are accepted for
+ * signed conversions for now. This is debatable.
+ *
+ * Note that 'x' is the original expression, and 'ux' is
+ * the unique variable that contains the value.
+ *
+ * We use 'ux' for pure type checking, and 'x' for when
+ * we need to look at the value (but without evaluating
+ * it for side effects! Careful to only ever evaluate it
+ * with sizeof() or __builtin_constant_p() etc).
+ *
+ * Pointers end up being checked by the normal C type
+ * rules at the actual comparison, and these expressions
+ * only need to be careful to not cause warnings for
+ * pointer use.
+ */
+#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
+#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
+#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
+	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+
+/*
+ * To avoid warnings about casting pointers to integers
+ * of different sizes, we need that special sign type.
+ *
+ * On 64-bit we can just always use 'long', since any
+ * integer or pointer type can just be cast to that.
+ *
+ * This does not work for 128-bit signed integers since
+ * the cast would truncate them, but we do not use s128
+ * types in the kernel (we do use 'u128', but they will
+ * be handled by the !is_signed_type() case).
+ *
+ * NOTE! The cast is there only to avoid any warnings
+ * from when values that aren't signed integer types.
+ */
+#ifdef CONFIG_64BIT
+  #define __signed_type(ux) long
+#else
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+#endif
+#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
 
-/* True for a non-negative signed int constant */
-#define __is_noneg_int(x)	\
-	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
+#define __types_ok(x,y,ux,uy) \
+	(__sign_use(x,ux) & __sign_use(y,uy))
 
-#define __types_ok(x, y, ux, uy) 				\
-	(__is_signed(ux) == __is_signed(uy) ||			\
-	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
-	 __is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok3(x,y,z,ux,uy,uz) \
+	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -53,8 +97,8 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	static_assert(__types_ok(x, y, ux, uy),		\
-		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
 #define __careful_cmp(op, x, y) \
@@ -70,8 +114,8 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
 #define __careful_clamp(val, lo, hi) \
-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
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Subject: [PATCH v4 04/11 6.1.y] minmax: fix up min3() and max3() too
Date: Fri, 3 Oct 2025 12:15:13 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 21b136cc63d2a9ddd60d4699552b69c214b32964 ]

David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.

And our current macros are actually rather broken.

In particular, the macros did this:

  #define min3(x, y, z) min((typeof(x))min(x, y), z)
  #define max3(x, y, z) max((typeof(x))max(x, y), z)

and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.

For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'.  The types are
compatible, and there's no warning - but the result is just random
garbage.

No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.

Requested-by: David Laight <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 41da6f85a407..98008dd92153 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -152,13 +152,20 @@
 #define umax(x, y)	\
 	__careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
 
+#define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
+	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
+	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+		#op"3("#x", "#y", "#z") signedness error");		\
+	__cmp(op, ux, __cmp(op, uy, uz)); })
+
 /**
  * min3 - return minimum of three values
  * @x: first value
  * @y: second value
  * @z: third value
  */
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
+#define min3(x, y, z) \
+	__careful_op3(min, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * max3 - return maximum of three values
@@ -166,7 +173,8 @@
  * @y: second value
  * @z: third value
  */
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
+#define max3(x, y, z) \
+	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
-- 
2.47.3

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Subject: [PATCH v4 05/11 6.1.y] minmax.h: add whitespace around operators and after commas
Date: Fri, 3 Oct 2025 12:15:14 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 71ee9b16251ea4bf7c1fe222517c82bdb3220acc ]

Patch series "minmax.h: Cleanups and minor optimisations".

Some tidyups and minor changes to minmax.h.

This patch (of 7):

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 98008dd92153..51b0d988e322 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -51,10 +51,10 @@
  * only need to be careful to not cause warnings for
  * pointer use.
  */
-#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
-#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
-#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
-	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
+#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
  * To avoid warnings about casting pointers to integers
@@ -74,15 +74,15 @@
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
+#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
 
-#define __types_ok(x,y,ux,uy) \
-	(__sign_use(x,ux) & __sign_use(y,uy))
+#define __types_ok(x, y, ux, uy) \
+	(__sign_use(x, ux) & __sign_use(y, uy))
 
-#define __types_ok3(x,y,z,ux,uy,uz) \
-	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
+#define __types_ok3(x, y, z, ux, uy, uz) \
+	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -97,7 +97,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -114,7 +114,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -154,7 +154,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
@@ -326,9 +326,9 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
-#define MIN(a,b) __cmp(min,a,b)
-#define MAX(a,b) __cmp(max,a,b)
-#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
-#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+#define MIN(a, b) __cmp(min, a, b)
+#define MAX(a, b) __cmp(max, a, b)
+#define MIN_T(type, a, b) __cmp(min, (type)(a), (type)(b))
+#define MAX_T(type, a, b) __cmp(max, (type)(a), (type)(b))
 
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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Subject: [PATCH v4 00/11 6.1.y] Backport minmax.h updates from v6.17-rc7
Date: Fri, 3 Oct 2025 12:15:09 +0000
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This series backports 11 patches to update minmax.h in the 6.1.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes (6.12.y and 6.6.y were already
backported by me and are now aligned).

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in older kernels.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Changes in v4:
- Just swap the order of the first 2 patches in this chain, because
  commit cb04e8b1d2f2 ("minmax: don't use max() in situations that want
  a C constant expression") should come before commit dc1c8034e31b
  ("minmax: simplify min()/max()/clamp() implementation").

Changes in v3:
- v2 included 13 patches:
  https://lore.kernel.org/stable/[email-masked]/
- First 2 were accepted and are part of 6.1.155.
- 3rd caused build in drivers/md/ to fail:

In file included from ./include/linux/container_of.h:5,
                 from ./include/linux/list.h:5,
                 from ./include/linux/wait.h:7,
                 from ./include/linux/mempool.h:8,
                 from ./include/linux/bio.h:8,
                 from drivers/md/dm-bio-record.h:10,
                 from drivers/md/dm-integrity.c:9:
drivers/md/dm-integrity.c: In function ‘integrity_metadata’:
drivers/md/dm-integrity.c:131:105: error: ISO C90 forbids variable length array ‘checksums_onstack’ [-Werror=vla]
  131 | #define MAX_TAG_SIZE                    (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
      |                                                                                                         ^~~~~~~~~~~~~
./include/linux/build_bug.h:78:56: note: in definition of macro ‘__static_assert’
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
./include/linux/minmax.h:56:9: note: in expansion of macro ‘static_assert’
   56 |         static_assert(__types_ok(x, y, ux, uy),         \
      |         ^~~~~~~~~~~~~
./include/linux/minmax.h:41:31: note: in expansion of macro ‘__is_noneg_int’
   41 |          __is_noneg_int(x) || __is_noneg_int(y))
      |                               ^~~~~~~~~~~~~~
./include/linux/minmax.h:56:23: note: in expansion of macro ‘__types_ok’
   56 |         static_assert(__types_ok(x, y, ux, uy),         \
      |                       ^~~~~~~~~~
./include/linux/minmax.h:61:9: note: in expansion of macro ‘__careful_cmp_once’
   61 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
      |         ^~~~~~~~~~~~~~~~~~
./include/linux/minmax.h:92:25: note: in expansion of macro ‘__careful_cmp’
   92 | #define max(x, y)       __careful_cmp(max, x, y)
      |                         ^~~~~~~~~~~~~
drivers/md/dm-integrity.c:1797:40: note: in expansion of macro ‘max’
 1797 |                 char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
      |                                        ^~~
drivers/md/dm-integrity.c:131:89: note: in expansion of macro ‘offsetof’
  131 | #define MAX_TAG_SIZE                    (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
      |                                                                                         ^~~~~~~~
drivers/md/dm-integrity.c:1797:73: note: in expansion of macro ‘MAX_TAG_SIZE’
 1797 |                 char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
      |                                                                         ^~~~~~~~~~~~

- The build was fixed in the second patch of this series.

Changes in v2:
- v1 included 19 patches:
  https://lore.kernel.org/stable/[email-masked]/
- First 6 were pushed to the stable-tree.
- 7th cauded amd driver's build to fail.
- This change fixes it.
- Modified files:
   drivers/gpu/drm/amd/amdgpu/amdgpu.h
   drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

David Laight (7):
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Linus Torvalds (4):
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: simplify min()/max()/clamp() implementation
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c   |   2 +-
 drivers/input/touchscreen/cyttsp4_core.c |   2 +-
 drivers/irqchip/irq-sun6i-r.c            |   2 +-
 drivers/md/dm-integrity.c                |   2 +-
 fs/btrfs/tree-checker.c                  |   2 +-
 include/linux/compiler.h                 |   9 +
 include/linux/minmax.h                   | 222 +++++++++++++----------
 lib/vsprintf.c                           |   2 +-
 8 files changed, 143 insertions(+), 100 deletions(-)

-- 
2.47.3

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Subject: [PATCH v4 01/11 6.1.y] minmax: don't use max() in situations that want a C constant expression
Date: Fri, 3 Oct 2025 12:15:10 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c   | 2 +-
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 drivers/md/dm-integrity.c                | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 768b6e7dbd77..fd1faa840ec0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -700,7 +700,7 @@ static const char *smu_get_feature_name(struct smu_context *smu,
 size_t smu_cmn_get_pp_feature_mask(struct smu_context *smu,
 				   char *buf)
 {
-	int8_t sort_feature[max(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
+	int8_t sort_feature[MAX(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
 	uint64_t feature_mask;
 	int i, feature_index;
 	uint32_t count = 0;
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index a01e44049415..99958d470d62 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -270,7 +270,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index a201019babe4..fc9cb626ca91 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1794,7 +1794,7 @@ static void integrity_metadata(struct work_struct *w)
 		struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
 		char *checksums;
 		unsigned int extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0;
-		char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+		char checksums_onstack[MAX(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 		sector_t sector;
 		unsigned int sectors_to_process;
 
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index d3e5429ee03d..6108cfab1ba5 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index fa1c19701855..2b0b5f08b8fc 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1082,7 +1082,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v4 02/11 6.1.y] minmax: simplify min()/max()/clamp() implementation
Date: Fri, 3 Oct 2025 12:15:11 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit dc1c8034e31b14a2e5e212104ec508aec44ce1b9 ]

Now that we no longer have any C constant expression contexts (ie array
size declarations or static initializers) that use min() or max(), we
can simpify the implementation by not having to worry about the result
staying as a C constant expression.

So now we can unconditionally just use temporary variables of the right
type, and get rid of the excessive expansion that used to come from the
use of

   __builtin_choose_expr(__is_constexpr(...), ..

to pick the specialized code for constant expressions.

Another expansion simplification is to pass the temporary variables (in
addition to the original expression) to our __types_ok() macro.  That
may superficially look like it complicates the macro, but when we only
want the type of the expression, expanding the temporary variable names
is much simpler and smaller than expanding the potentially complicated
original expression.

As a result, on my machine, doing a

  $ time make drivers/staging/media/atomisp/pci/isp/kernels/ynr/ynr_1.0/ia_css_ynr.host.i

goes from

	real	0m16.621s
	user	0m15.360s
	sys	0m1.221s

to

	real	0m2.532s
	user	0m2.091s
	sys	0m0.452s

because the token expansion goes down dramatically.

In particular, the longest line expansion (which was line 71 of that
'ia_css_ynr.host.c' file) shrinks from 23,338kB (yes, 23MB for one
single line) to "just" 1,444kB (now "only" 1.4MB).

And yes, that line is still the line from hell, because it's doing
multiple levels of "min()/max()" expansion thanks to some of them being
hidden inside the uDIGIT_FITTING() macro.

Lorenzo has a nice cleanup patch that makes that driver use inline
functions instead of macros for sDIGIT_FITTING() and uDIGIT_FITTING(),
which will fix that line once and for all, but the 16-fold reduction in
this case does show why we need to simplify these helpers.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 43 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index fc384714da45..e3e4353df983 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -35,10 +35,10 @@
 #define __is_noneg_int(x)	\
 	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
 
-#define __types_ok(x, y) 					\
-	(__is_signed(x) == __is_signed(y) ||			\
-		__is_signed((x) + 0) == __is_signed((y) + 0) ||	\
-		__is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok(x, y, ux, uy) 				\
+	(__is_signed(ux) == __is_signed(uy) ||			\
+	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
+	 __is_noneg_int(x) || __is_noneg_int(y))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -51,34 +51,31 @@
 #define __cmp_once(op, type, x, y) \
 	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __careful_cmp_once(op, x, y) ({			\
-	static_assert(__types_ok(x, y),			\
+#define __careful_cmp_once(op, x, y, ux, uy) ({		\
+	__auto_type ux = (x); __auto_type uy = (y);	\
+	static_assert(__types_ok(x, y, ux, uy),		\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp_once(op, __auto_type, x, y); })
+	__cmp(op, ux, uy); })
 
-#define __careful_cmp(op, x, y)					\
-	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y), __careful_cmp_once(op, x, y))
+#define __careful_cmp(op, x, y) \
+	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
-	typeof(val) unique_val = (val);						\
-	typeof(lo) unique_lo = (lo);						\
-	typeof(hi) unique_hi = (hi);						\
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-	__clamp(unique_val, unique_lo, unique_hi); })
-
-#define __careful_clamp(val, lo, hi) ({					\
-	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-		__clamp(val, lo, hi),					\
-		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
-			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
  * min - return minimum of two values of the same or compatible types
-- 
2.47.3

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Subject: Re: [PATCH 6.1 00/73] 6.1.155-rc1 review
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--V96TjXExK4Tqjc12
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Hi!

> This is the start of the stable review cycle for the 6.1.155 release.
> There are 73 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.1.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--V96TjXExK4Tqjc12
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--V96TjXExK4Tqjc12--

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Date: Fri, 3 Oct 2025 08:58:05 +0200
From: Pavel Machek <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
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	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH 5.10 000/122] 5.10.245-rc1 review
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--UFmWpGlbQqNCRvmw
Content-Type: text/plain; charset=us-ascii
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Hi!

> This is the start of the stable review cycle for the 5.10.245 release.
> There are 122 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
5.10.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
Office: Kirchenstr.5, D-82194 Groebenzell, Germany

--UFmWpGlbQqNCRvmw
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--UFmWpGlbQqNCRvmw--

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Date: Fri, 3 Oct 2025 01:45:06 -0700
From: Breno Leitao <[email-masked]>
To: Andrew Lunn <[email-masked]>, 
	"David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
	Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>, Shuah Khan <[email-masked]>, 
	Simon Horman <[email-masked]>, david decotigny <[email-masked]>
Cc: [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked], [email-masked], 
	[email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH net v6 0/4] net: netpoll: fix memory leak and add
 comprehensive selftests
                             query to Validity was blocked.  See
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On Thu, Oct 02, 2025 at 08:26:24AM -0700, Breno Leitao wrote:
> Fix a memory leak in netpoll and introduce netconsole selftests that
> expose the issue when running with kmemleak detection enabled.
> 
> This patchset includes a selftest for netpoll with multiple concurrent
> users (netconsole + bonding), which simulates the scenario from test[1]
> that originally demonstrated the issue allegedly fixed by commit
> efa95b01da18 ("netpoll: fix use after free") - a commit that is now
> being reverted.
> 
> Sending this to "net" branch because this is a fix, and the selftest
> might help with the backports validation.

This is conflicting with `net` tree. Rebasing and resending.

From - Fri Oct 17 14:26:32 2025
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From: Breno Leitao <[email-masked]>
Subject: [PATCH net v7 0/4] net: netpoll: fix memory leak and add
 comprehensive selftests
Date: Fri, 03 Oct 2025 04:57:11 -0700
To: Andrew Lunn <[email-masked]>, 
 "David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>, 
 Shuah Khan <[email-masked]>, Simon Horman <[email-masked]>, 
 david decotigny <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], [email-masked], 
 [email-masked], [email-masked], [email-masked], 
 [email-masked], Breno Leitao <[email-masked]>, [email-masked]
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Fix a memory leak in netpoll and introduce netconsole selftests that
expose the issue when running with kmemleak detection enabled.

This patchset includes a selftest for netpoll with multiple concurrent
users (netconsole + bonding), which simulates the scenario from test[1]
that originally demonstrated the issue allegedly fixed by commit
efa95b01da18 ("netpoll: fix use after free") - a commit that is now
being reverted.

Sending this to "net" branch because this is a fix, and the selftest
might help with the backports validation.

Link: https://lore.kernel.org/lkml/[email-masked]/ [1]

Signed-off-by: Breno Leitao <[email-masked]>
---
Changes in v7:
- Rebased on top of `net`
- Link to v6: https://lore.kernel.org/r/[email-masked]

Changes in v6:
- Expand the tests even more and some small fixups
- Moved the test to bonding selftests
- Link to v5: https://lore.kernel.org/r/[email-masked]

Changes in v5:
- Set CONFIG_BONDING=m in selftests/drivers/net/config.
- Link to v4: https://lore.kernel.org/r/[email-masked]

Changes in v4:
- Added an additional selftest to test multiple netpoll users in
  parallel
- Link to v3: https://lore.kernel.org/r/[email-masked]

Changes in v3:
- This patchset is a merge of the fix and the selftest together as
  recommended by Jakub.

Changes in v2:
- Reuse the netconsole creation from lib_netcons.sh. Thus, refactoring
  the create_dynamic_target() (Jakub)
- Move the "wait" to after all the messages has been sent.
- Link to v1: https://lore.kernel.org/r/[email-masked]

---
Breno Leitao (4):
      net: netpoll: fix incorrect refcount handling causing incorrect cleanup
      selftest: netcons: refactor target creation
      selftest: netcons: create a torture test
      selftest: netcons: add test for netconsole over bonded interfaces

 net/core/netpoll.c                                 |   7 +-
 tools/testing/selftests/drivers/net/Makefile       |   1 +
 .../testing/selftests/drivers/net/bonding/Makefile |   2 +
 tools/testing/selftests/drivers/net/bonding/config |   4 +
 .../drivers/net/bonding/netcons_over_bonding.sh    | 221 +++++++++++++++++++++
 .../selftests/drivers/net/lib/sh/lib_netcons.sh    | 188 ++++++++++++++++--
 .../selftests/drivers/net/netcons_torture.sh       | 127 ++++++++++++
 7 files changed, 530 insertions(+), 20 deletions(-)
---
base-commit: 7ae421cf78bd795513ec3a7d7ef7ac9437693e23
change-id: 20250902-netconsole_torture-8fc23f0aca99

Best regards,
--  
Breno Leitao <[email-masked]>

From - Fri Oct 17 14:26:32 2025
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From: Breno Leitao <[email-masked]>
Date: Fri, 03 Oct 2025 04:57:12 -0700
Subject: [PATCH net v7 1/4] net: netpoll: fix incorrect refcount handling
 causing incorrect cleanup
To: Andrew Lunn <[email-masked]>, 
 "David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
 Jakub Kicinski <[email-masked]>, Paolo Abeni <[email-masked]>, 
 Shuah Khan <[email-masked]>, Simon Horman <[email-masked]>, 
 david decotigny <[email-masked]>
Cc: [email-masked], [email-masked], 
 [email-masked], [email-masked], [email-masked], 
 [email-masked], [email-masked], [email-masked], 
 [email-masked], Breno Leitao <[email-masked]>, [email-masked]
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commit efa95b01da18 ("netpoll: fix use after free") incorrectly
ignored the refcount and prematurely set dev->npinfo to NULL during
netpoll cleanup, leading to improper behavior and memory leaks.

Scenario causing lack of proper cleanup:

1) A netpoll is associated with a NIC (e.g., eth0) and netdev->npinfo is
   allocated, and refcnt = 1
   - Keep in mind that npinfo is shared among all netpoll instances. In
     this case, there is just one.

2) Another netpoll is also associated with the same NIC and
   npinfo->refcnt += 1.
   - Now dev->npinfo->refcnt = 2;
   - There is just one npinfo associated to the netdev.

3) When the first netpolls goes to clean up:
   - The first cleanup succeeds and clears np->dev->npinfo, ignoring
     refcnt.
     - It basically calls `RCU_INIT_POINTER(np->dev->npinfo, NULL);`
   - Set dev->npinfo = NULL, without proper cleanup
   - No ->ndo_netpoll_cleanup() is either called

4) Now the second target tries to clean up
   - The second cleanup fails because np->dev->npinfo is already NULL.
     * In this case, ops->ndo_netpoll_cleanup() was never called, and
       the skb pool is not cleaned as well (for the second netpoll
       instance)
  - This leaks npinfo and skbpool skbs, which is clearly reported by
    kmemleak.

Revert commit efa95b01da18 ("netpoll: fix use after free") and adds
clarifying comments emphasizing that npinfo cleanup should only happen
once the refcount reaches zero, ensuring stable and correct netpoll
behavior.

Cc: <[email-masked]> # 3.17.x
Cc: Jay Vosburgh <[email-masked]>
Fixes: efa95b01da18 ("netpoll: fix use after free")
Signed-off-by: Breno Leitao <[email-masked]>
Reviewed-by: Simon Horman <[email-masked]>
---
 net/core/netpoll.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 60a05d3b7c249..f4a0023428265 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -814,6 +814,10 @@ static void __netpoll_cleanup(struct netpoll *np)
 	if (!npinfo)
 		return;
 
+	/* At this point, there is a single npinfo instance per netdevice, and
+	 * its refcnt tracks how many netpoll structures are linked to it. We
+	 * only perform npinfo cleanup when the refcnt decrements to zero.
+	 */
 	if (refcount_dec_and_test(&npinfo->refcnt)) {
 		const struct net_device_ops *ops;
 
@@ -823,8 +827,7 @@ static void __netpoll_cleanup(struct netpoll *np)
 
 		RCU_INIT_POINTER(np->dev->npinfo, NULL);
 		call_rcu(&npinfo->rcu, rcu_cleanup_netpoll_info);
-	} else
-		RCU_INIT_POINTER(np->dev->npinfo, NULL);
+	}
 
 	skb_pool_flush(np);
 }

-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
	Dan Carpenter <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH 19/19 5.15.y] minmax.h: remove some #defines that are only expanded once
Date: Thu, 2 Oct 2025 20:47:33 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 2b97aaf74ed534fb838d09867d09a3ca5d795208 ]

The bodies of __signed_type_use() and __unsigned_type_use() are much the
same size as their names - so put the bodies in the only line that expands
them.

Similarly __signed_type() is defined separately for 64bit and then used
exactly once just below.

Change the test for __signed_type from CONFIG_64BIT to one based on gcc
defined macros so that the code is valid if it gets used outside of a
kernel build.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2bbdd5b5e07e..eaaf5c008e4d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,8 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(ux) (2 + __is_nonneg(ux))
-#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
 #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(ux) : __unsigned_type_use(ux))
+	(2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -57,7 +55,7 @@
  * A cast is needed to avoid any warnings from values that aren't signed
  * integer types (in which case the result doesn't matter).
  *
- * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * On 64-bit any integer or pointer type can safely be cast to 'long long'.
  * But on 32-bit we need to avoid warnings about casting pointers to integers
  * of different sizes without truncating 64-bit values so 'long' or 'long long'
  * must be used depending on the size of the value.
@@ -66,12 +64,12 @@
  * them, but we do not use s128 types in the kernel (we do use 'u128',
  * but they are handled by the !is_signed_type() case).
  */
-#ifdef CONFIG_64BIT
-  #define __signed_type(ux) long
+#if __SIZEOF_POINTER__ == __SIZEOF_LONG_LONG__
+#define __is_nonneg(ux) statically_true((long long)(ux) >= 0)
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
+#define __is_nonneg(ux) statically_true( \
+	(typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
 #endif
-#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
 #define __types_ok(ux, uy) \
 	(__sign_use(ux) & __sign_use(uy))
-- 
2.47.3

From - Fri Oct 17 14:26:32 2025
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From: Jens Axboe <[email-masked]>
To: Lizhi Xu <[email-masked]>, [email-masked], 
 [email-masked], Li Chen <[email-masked]>
Cc: [email-masked], Markus Elfring <[email-masked]>, 
 Yang Erkun <[email-masked]>, Ming Lei <[email-masked]>, 
 Yu Kuai <[email-masked]>
Subject: Re: [PATCH v2] loop: fix backing file reference leak on validation
 error
Date: Thu, 02 Oct 2025 15:30:02 -0600
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On Tue, 30 Sep 2025 08:35:59 +0800, Li Chen wrote:
> loop_change_fd() and loop_configure() call loop_check_backing_file()
> to validate the new backing file. If validation fails, the reference
> acquired by fget() was not dropped, leaking a file reference.
> 
> Fix this by calling fput(file) before returning the error.
> 
> 
> [...]

Applied, thanks!

[1/1] loop: fix backing file reference leak on validation error
      commit: 98b7bf54338b797e3a11e8178ce0e806060d8fa3

Best regards,
-- 
Jens Axboe

From - Fri Oct 17 14:26:32 2025
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Date: Fri, 3 Oct 2025 08:08:59 +0200
From: Greg KH <[email-masked]>
To: Gergo Koteles <[email-masked]>
Cc: Shenghao Ding <[email-masked]>, [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
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Subject: Re: [PATCH v4] ALSA: hda/tas2781: Fix the order of TAS2781
 calibrated-data
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On Thu, Oct 02, 2025 at 09:26:06PM +0200, Gergo Koteles wrote:
> Cc: <[email-masked]>

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

From - Fri Oct 17 14:26:32 2025
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Date: Fri, 3 Oct 2025 08:09:07 +0200
From: Greg KH <[email-masked]>
To: Gergo Koteles <[email-masked]>
Cc: Shenghao Ding <[email-masked]>, [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked]
Subject: Re: [PATCH v1] ALSA: hda/tas2781: Fix a potential race condition
 that causes a NULL pointer in case no efi.get_variable exsits
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SpamTally: Final spam score: 0

On Thu, Oct 02, 2025 at 09:27:46PM +0200, Gergo Koteles wrote:
> Cc: <[email-masked]>

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

From - Fri Oct 17 14:26:32 2025
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Date: Fri, 3 Oct 2025 08:56:48 +0200
From: Pavel Machek <[email-masked]>
To: Greg Kroah-Hartman <[email-masked]>
Cc: [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked]
Subject: Re: [PATCH 6.12 00/89] 6.12.50-rc1 review
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--dLhoB2bpvRytRt1e
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Hi!

> This is the start of the stable review cycle for the 6.12.50 release.
> There are 89 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-=
6.12.y

Tested-by: Pavel Machek (CIP) <[email-masked]>

Best regards,
                                                                Pavel
--=20
In cooperation with DENX Software Engineering GmbH, HRB 165235 Munich,
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From: Eliav Farber <[email-masked]>
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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH 18/19 5.15.y] minmax.h: simplify the variants of clamp()
Date: Thu, 2 Oct 2025 20:47:32 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ]

Always pass a 'type' through to __clamp_once(), pass '__auto_type' from
clamp() itself.

The expansion of __types_ok3() is reasonable so it isn't worth the added
complexity of avoiding it when a fixed type is used for all three values.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 75fb7a6ad4c6..2bbdd5b5e07e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -183,29 +183,29 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
+#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({			\
+	type uval = (val);							\
+	type ulo = (lo);							\
+	type uhi = (hi);							\
 	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+#define __careful_clamp(type, val, lo, hi) \
+	__clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
- * clamp - return a value clamped to a given range with strict typechecking
+ * clamp - return a value clamped to a given range with typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
- * same type as @val.  See the unnecessary pointer comparisons.
+ * This macro checks @val/@lo/@hi to make sure they have compatible
+ * signedness.
  */
-#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
+#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
 
 /**
  * clamp_t - return a value clamped to a given range using a given type
@@ -217,7 +217,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
+#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
@@ -230,7 +230,7 @@
  * type and @lo and @hi are literals that will otherwise be assigned a signed
  * integer type.
  */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
	Dan Carpenter <[email-masked]>, "Jason A. Donenfeld"
	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Pedro
 Falcato" <[email-masked]>
Subject: [PATCH 17/19 5.15.y] minmax.h: move all the clamp() definitions after the min/max() ones
Date: Thu, 2 Oct 2025 20:47:31 +0000
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From: David Laight <[email-masked]>

[ Upstream commit c3939872ee4a6b8bdcd0e813c66823b31e6e26f7 ]

At some point the definitions for clamp() got added in the middle of the
ones for min() and max().  Re-order the definitions so they are more
sensibly grouped.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 109 +++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 58 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 91aa1b90c1bb..75fb7a6ad4c6 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -99,22 +99,6 @@
 #define __careful_cmp(op, x, y) \
 	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __clamp(val, lo, hi)	\
-	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
-	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
-		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
-		"clamp("#val", "#lo", "#hi") signedness error");		\
-	__clamp(uval, ulo, uhi); })
-
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
-
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -170,6 +154,22 @@
 #define max3(x, y, z) \
 	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
+/**
+ * min_t - return minimum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
+
+/**
+ * max_t - return maximum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
@@ -180,6 +180,22 @@
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
@@ -191,28 +207,30 @@
  */
 #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
-/*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max/clamp at all, of course.
- */
-
 /**
- * min_t - return minimum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_t - return a value clamped to a given range using a given type
+ * @type: the type of variable to use
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of type
+ * @type to make all the comparisons.
  */
-#define min_t(type, x, y) __cmp_once(min, type, x, y)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
- * max_t - return maximum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_val - return a value clamped to a given range using val's type
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of whatever
+ * type the input argument @val is.  This is useful when @val is an unsigned
+ * type and @lo and @hi are literals that will otherwise be assigned a signed
+ * integer type.
  */
-#define max_t(type, x, y) __cmp_once(max, type, x, y)
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
@@ -257,31 +275,6 @@
  */
 #define max_array(array, len) __minmax_array(max, array, len)
 
-/**
- * clamp_t - return a value clamped to a given range using a given type
- * @type: the type of variable to use
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of type
- * @type to make all the comparisons.
- */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
-
-/**
- * clamp_val - return a value clamped to a given range using val's type
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of whatever
- * type the input argument @val is.  This is useful when @val is an unsigned
- * type and @lo and @hi are literals that will otherwise be assigned a signed
- * integer type.
- */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
-
 static inline bool in_range64(u64 val, u64 start, u64 len)
 {
 	return (val - start) < len;
-- 
2.47.3

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Subject: [PATCH 16/19 5.15.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
Date: Thu, 2 Oct 2025 20:47:30 +0000
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From: David Laight <[email-masked]>

[ Upstream commit a5743f32baec4728711bbc01d6ac2b33d4c67040 ]

Use BUILD_BUG_ON_MSG(statically_true(ulo > uhi), ...) for the sanity check
of the bounds in clamp().  Gives better error coverage and one less
expansion of the arguments.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 6f7ea669d305..91aa1b90c1bb 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -106,8 +106,7 @@
 	__auto_type uval = (val);						\
 	__auto_type ulo = (lo);							\
 	__auto_type uhi = (hi);							\
-	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-			(lo) <= (hi), true),					\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
-- 
2.47.3

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Subject: [PATCH 13/19 5.15.y] minmax.h: add whitespace around operators and after commas
Date: Thu, 2 Oct 2025 20:47:27 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 71ee9b16251ea4bf7c1fe222517c82bdb3220acc ]

Patch series "minmax.h: Cleanups and minor optimisations".

Some tidyups and minor changes to minmax.h.

This patch (of 7):

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 98008dd92153..51b0d988e322 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -51,10 +51,10 @@
  * only need to be careful to not cause warnings for
  * pointer use.
  */
-#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
-#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
-#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
-	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
+#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
  * To avoid warnings about casting pointers to integers
@@ -74,15 +74,15 @@
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
+#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
 
-#define __types_ok(x,y,ux,uy) \
-	(__sign_use(x,ux) & __sign_use(y,uy))
+#define __types_ok(x, y, ux, uy) \
+	(__sign_use(x, ux) & __sign_use(y, uy))
 
-#define __types_ok3(x,y,z,ux,uy,uz) \
-	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
+#define __types_ok3(x, y, z, ux, uy, uz) \
+	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -97,7 +97,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -114,7 +114,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -154,7 +154,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
@@ -326,9 +326,9 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
-#define MIN(a,b) __cmp(min,a,b)
-#define MAX(a,b) __cmp(max,a,b)
-#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
-#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+#define MIN(a, b) __cmp(min, a, b)
+#define MAX(a, b) __cmp(max, a, b)
+#define MIN_T(type, a, b) __cmp(min, (type)(a), (type)(b))
+#define MAX_T(type, a, b) __cmp(max, (type)(a), (type)(b))
 
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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Subject: [PATCH 14/19 5.15.y] minmax.h: update some comments
Date: Thu, 2 Oct 2025 20:47:28 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 10666e99204818ef45c702469488353b5bb09ec7 ]

- Change three to several.
- Remove the comment about retaining constant expressions, no longer true.
- Realign to nearer 80 columns and break on major punctiation.
- Add a leading comment to the block before __signed_type() and __is_nonneg()
  Otherwise the block explaining the cast is a bit 'floating'.
  Reword the rest of that comment to improve readability.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 53 +++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 51b0d988e322..24e4b372649a 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 
 /*
- * min()/max()/clamp() macros must accomplish three things:
+ * min()/max()/clamp() macros must accomplish several things:
  *
  * - Avoid multiple evaluations of the arguments (so side-effects like
  *   "x++" happen only once) when non-constant.
- * - Retain result as a constant expressions when called with only
- *   constant expressions (to avoid tripping VLA warnings in stack
- *   allocation usage).
  * - Perform signed v unsigned type-checking (to generate compile
  *   errors instead of nasty runtime surprises).
  * - Unsigned char/short are always promoted to signed int and can be
@@ -31,25 +28,23 @@
  *   bit #0 set if ok for unsigned comparisons
  *   bit #1 set if ok for signed comparisons
  *
- * In particular, statically non-negative signed integer
- * expressions are ok for both.
+ * In particular, statically non-negative signed integer expressions
+ * are ok for both.
  *
- * NOTE! Unsigned types smaller than 'int' are implicitly
- * converted to 'int' in expressions, and are accepted for
- * signed conversions for now. This is debatable.
+ * NOTE! Unsigned types smaller than 'int' are implicitly converted to 'int'
+ * in expressions, and are accepted for signed conversions for now.
+ * This is debatable.
  *
- * Note that 'x' is the original expression, and 'ux' is
- * the unique variable that contains the value.
+ * Note that 'x' is the original expression, and 'ux' is the unique variable
+ * that contains the value.
  *
- * We use 'ux' for pure type checking, and 'x' for when
- * we need to look at the value (but without evaluating
- * it for side effects! Careful to only ever evaluate it
- * with sizeof() or __builtin_constant_p() etc).
+ * We use 'ux' for pure type checking, and 'x' for when we need to look at the
+ * value (but without evaluating it for side effects!
+ * Careful to only ever evaluate it with sizeof() or __builtin_constant_p() etc).
  *
- * Pointers end up being checked by the normal C type
- * rules at the actual comparison, and these expressions
- * only need to be careful to not cause warnings for
- * pointer use.
+ * Pointers end up being checked by the normal C type rules at the actual
+ * comparison, and these expressions only need to be careful to not cause
+ * warnings for pointer use.
  */
 #define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
 #define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
@@ -57,19 +52,19 @@
 	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
- * To avoid warnings about casting pointers to integers
- * of different sizes, we need that special sign type.
+ * Check whether a signed value is always non-negative.
  *
- * On 64-bit we can just always use 'long', since any
- * integer or pointer type can just be cast to that.
+ * A cast is needed to avoid any warnings from values that aren't signed
+ * integer types (in which case the result doesn't matter).
  *
- * This does not work for 128-bit signed integers since
- * the cast would truncate them, but we do not use s128
- * types in the kernel (we do use 'u128', but they will
- * be handled by the !is_signed_type() case).
+ * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * But on 32-bit we need to avoid warnings about casting pointers to integers
+ * of different sizes without truncating 64-bit values so 'long' or 'long long'
+ * must be used depending on the size of the value.
  *
- * NOTE! The cast is there only to avoid any warnings
- * from when values that aren't signed integer types.
+ * This does not work for 128-bit signed integers since the cast would truncate
+ * them, but we do not use s128 types in the kernel (we do use 'u128',
+ * but they are handled by the !is_signed_type() case).
  */
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
-- 
2.47.3

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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
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	<[email-masked]>, Jens Axboe <[email-masked]>, Lorenzo Stoakes
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Subject: [PATCH 15/19 5.15.y] minmax.h: reduce the #define expansion of min(), max() and clamp()
Date: Thu, 2 Oct 2025 20:47:29 +0000
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From: David Laight <[email-masked]>

[ Upstream commit b280bb27a9f7c91ddab730e1ad91a9c18a051f41 ]

Since the test for signed values being non-negative only relies on
__builtion_constant_p() (not is_constexpr()) it can use the 'ux' variable
instead of the caller supplied expression.  This means that the #define
parameters are only expanded twice.  Once in the code and once quoted in
the error message.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 24e4b372649a..6f7ea669d305 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,10 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
-#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
-#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
+#define __signed_type_use(ux) (2 + __is_nonneg(ux))
+#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(ux) : __unsigned_type_use(ux))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -71,13 +71,13 @@
 #else
   #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
+#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
-#define __types_ok(x, y, ux, uy) \
-	(__sign_use(x, ux) & __sign_use(y, uy))
+#define __types_ok(ux, uy) \
+	(__sign_use(ux) & __sign_use(uy))
 
-#define __types_ok3(x, y, z, ux, uy, uz) \
-	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
+#define __types_ok3(ux, uy, uz) \
+	(__sign_use(ux) & __sign_use(uy) & __sign_use(uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -92,7 +92,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(ux, uy),		\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -109,7 +109,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -149,7 +149,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(ux, uy, uz),			\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH 10/19 5.15.y] minmax: don't use max() in situations that want a C constant expression
Date: Thu, 2 Oct 2025 20:47:24 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 drivers/md/dm-integrity.c                | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index 4cd3e533740b..74b1bd331425 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -268,7 +268,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 8e2b00536c3e..9e2bbfe328f0 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1705,7 +1705,7 @@ static void integrity_metadata(struct work_struct *w)
 		struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
 		char *checksums;
 		unsigned extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0;
-		char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+		char checksums_onstack[MAX(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 		sector_t sector;
 		unsigned sectors_to_process;
 
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 51e04efe3e20..8f96ddaceb9a 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index d86abdc77c26..e46eb93c115d 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1100,7 +1100,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, Arnd Bergmann
	<[email-masked]>, David Laight <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>
Subject: [PATCH 11/19 5.15.y] minmax: improve macro expansion and type checking
Date: Thu, 2 Oct 2025 20:47:25 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 22f5468731491e53356ba7c028f0fdea20b18e2c ]

This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.

In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:

 - an expression with a signed type can be used for
    (1) signed comparisons
    (2) unsigned comparisons if it is statically known to have a
        non-negative value

 - an expression with an unsigned type can be used for
    (3) unsigned comparison
    (4) signed comparisons if the type is smaller than 'int' and thus
        the C integer promotion rules will make it signed anyway

Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.

Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel.  Notably with
bcachefs having an expression like

	min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)

where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.

Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.

However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.

But at least for now the rule is in place for backwards compatibility.

Also note that rule (2) existed before, but is hugely relaxed by this
commit.  It used to be true only for the simplest compile-time
non-negative integer constants.  The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.

For example, the amdgpu driver does

	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));

because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.

Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.

Cc: Arnd Bergmann <[email-masked]>
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/compiler.h |  9 +++++
 include/linux/minmax.h   | 74 ++++++++++++++++++++++++++++++++--------
 2 files changed, 68 insertions(+), 15 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 4f03dfb6de0d..ee9e39d315c8 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -258,6 +258,15 @@ static inline void *offset_to_ptr(const int *off)
  */
 #define is_signed_type(type) (((type)(-1)) < (__force type)1)
 
+/*
+ * Useful shorthand for "is this condition known at compile-time?"
+ *
+ * Note that the condition may involve non-constant values,
+ * but the compiler may know enough about the details of the
+ * values to determine that the condition is statically true.
+ */
+#define statically_true(x) (__builtin_constant_p(x) && (x))
+
 /*
  * This is needed in functions which generate the stack canary, see
  * arch/x86/kernel/smpboot.c::start_secondary() for an example.
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index e3e4353df983..41da6f85a407 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -26,19 +26,63 @@
 #define __typecheck(x, y) \
 	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
 
-/* is_signed_type() isn't a constexpr for pointer types */
-#define __is_signed(x) 								\
-	__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))),	\
-		is_signed_type(typeof(x)), 0)
+/*
+ * __sign_use for integer expressions:
+ *   bit #0 set if ok for unsigned comparisons
+ *   bit #1 set if ok for signed comparisons
+ *
+ * In particular, statically non-negative signed integer
+ * expressions are ok for both.
+ *
+ * NOTE! Unsigned types smaller than 'int' are implicitly
+ * converted to 'int' in expressions, and are accepted for
+ * signed conversions for now. This is debatable.
+ *
+ * Note that 'x' is the original expression, and 'ux' is
+ * the unique variable that contains the value.
+ *
+ * We use 'ux' for pure type checking, and 'x' for when
+ * we need to look at the value (but without evaluating
+ * it for side effects! Careful to only ever evaluate it
+ * with sizeof() or __builtin_constant_p() etc).
+ *
+ * Pointers end up being checked by the normal C type
+ * rules at the actual comparison, and these expressions
+ * only need to be careful to not cause warnings for
+ * pointer use.
+ */
+#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
+#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
+#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
+	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+
+/*
+ * To avoid warnings about casting pointers to integers
+ * of different sizes, we need that special sign type.
+ *
+ * On 64-bit we can just always use 'long', since any
+ * integer or pointer type can just be cast to that.
+ *
+ * This does not work for 128-bit signed integers since
+ * the cast would truncate them, but we do not use s128
+ * types in the kernel (we do use 'u128', but they will
+ * be handled by the !is_signed_type() case).
+ *
+ * NOTE! The cast is there only to avoid any warnings
+ * from when values that aren't signed integer types.
+ */
+#ifdef CONFIG_64BIT
+  #define __signed_type(ux) long
+#else
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+#endif
+#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
 
-/* True for a non-negative signed int constant */
-#define __is_noneg_int(x)	\
-	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
+#define __types_ok(x,y,ux,uy) \
+	(__sign_use(x,ux) & __sign_use(y,uy))
 
-#define __types_ok(x, y, ux, uy) 				\
-	(__is_signed(ux) == __is_signed(uy) ||			\
-	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
-	 __is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok3(x,y,z,ux,uy,uz) \
+	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -53,8 +97,8 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	static_assert(__types_ok(x, y, ux, uy),		\
-		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
 #define __careful_cmp(op, x, y) \
@@ -70,8 +114,8 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
 #define __careful_clamp(val, lo, hi) \
-- 
2.47.3

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To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Arnd Bergmann <[email-masked]>
Subject: [PATCH 12/19 5.15.y] minmax: fix up min3() and max3() too
Date: Thu, 2 Oct 2025 20:47:26 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 21b136cc63d2a9ddd60d4699552b69c214b32964 ]

David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.

And our current macros are actually rather broken.

In particular, the macros did this:

  #define min3(x, y, z) min((typeof(x))min(x, y), z)
  #define max3(x, y, z) max((typeof(x))max(x, y), z)

and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.

For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'.  The types are
compatible, and there's no warning - but the result is just random
garbage.

No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.

Requested-by: David Laight <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 41da6f85a407..98008dd92153 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -152,13 +152,20 @@
 #define umax(x, y)	\
 	__careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
 
+#define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
+	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
+	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+		#op"3("#x", "#y", "#z") signedness error");		\
+	__cmp(op, ux, __cmp(op, uy, uz)); })
+
 /**
  * min3 - return minimum of three values
  * @x: first value
  * @y: second value
  * @z: third value
  */
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
+#define min3(x, y, z) \
+	__careful_op3(min, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * max3 - return maximum of three values
@@ -166,7 +173,8 @@
  * @y: second value
  * @z: third value
  */
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
+#define max3(x, y, z) \
+	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>, <[email-masked]>,
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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH 07/19 5.15.y] minmax: add a few more MIN_T/MAX_T users
Date: Thu, 2 Oct 2025 20:47:21 +0000
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From: Linus Torvalds <[email-masked]>

commit 4477b39c32fdc03363affef4b11d48391e6dc9ff upstream.

Commit 3a7e02c040b1 ("minmax: avoid overly complicated constant
expressions in VM code") added the simpler MIN_T/MAX_T macros in order
to avoid some excessive expansion from the rather complicated regular
min/max macros.

The complexity of those macros stems from two issues:

 (a) trying to use them in situations that require a C constant
     expression (in static initializers and for array sizes)

 (b) the type sanity checking

and MIN_T/MAX_T avoids both of these issues.

Now, in the whole (long) discussion about all this, it was pointed out
that the whole type sanity checking is entirely unnecessary for
min_t/max_t which get a fixed type that the comparison is done in.

But that still leaves min_t/max_t unnecessarily complicated due to
worries about the C constant expression case.

However, it turns out that there really aren't very many cases that use
min_t/max_t for this, and we can just force-convert those.

This does exactly that.

Which in turn will then allow for much simpler implementations of
min_t()/max_t().  All the usual "macros in all upper case will evaluate
the arguments multiple times" rules apply.

We should do all the same things for the regular min/max() vs MIN/MAX()
cases, but that has the added complexity of various drivers defining
their own local versions of MIN/MAX, so that needs another level of
fixes first.

Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/x86/mm/pgtable.c                             | 2 +-
 drivers/edac/sb_edac.c                            | 4 ++--
 drivers/gpu/drm/drm_color_mgmt.c                  | 2 +-
 drivers/md/dm-integrity.c                         | 2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
 net/ipv4/proc.c                                   | 2 +-
 net/ipv6/proc.c                                   | 2 +-
 7 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 3481b35cb4ec..e649161eb6fc 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -107,7 +107,7 @@ static inline void pgd_list_del(pgd_t *pgd)
 #define UNSHARED_PTRS_PER_PGD				\
 	(SHARED_KERNEL_PMD ? KERNEL_PGD_BOUNDARY : PTRS_PER_PGD)
 #define MAX_UNSHARED_PTRS_PER_PGD			\
-	max_t(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)
+	MAX_T(size_t, KERNEL_PGD_BOUNDARY, PTRS_PER_PGD)

 static void pgd_set_mm(pgd_t *pgd, struct mm_struct *mm)
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 1522d4aa2ca6..714020e7405a 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -109,8 +109,8 @@ static const u32 knl_interleave_list[] = {
 	0x104, 0x10c, 0x114, 0x11c,   /* 20-23 */
 };
 #define MAX_INTERLEAVE							\
-	(max_t(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
-	       max_t(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
+	(MAX_T(unsigned int, ARRAY_SIZE(sbridge_interleave_list),	\
+	       MAX_T(unsigned int, ARRAY_SIZE(ibridge_interleave_list),	\
 		     ARRAY_SIZE(knl_interleave_list))))
 
 struct interleave_pkg {
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index bb14f488c8f6..1ff572d8744e 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -528,7 +528,7 @@ int drm_plane_create_color_properties(struct drm_plane *plane,
 {
 	struct drm_device *dev = plane->dev;
 	struct drm_property *prop;
-	struct drm_prop_enum_list enum_list[max_t(int, DRM_COLOR_ENCODING_MAX,
+	struct drm_prop_enum_list enum_list[MAX_T(int, DRM_COLOR_ENCODING_MAX,
 						       DRM_COLOR_RANGE_MAX)];
 	int i, len;
 
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e9d553eea9cd..8e2b00536c3e 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2536,7 +2536,7 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
 				    unlikely(from_replay) &&
 #endif
 				    ic->internal_hash) {
-					char test_tag[max_t(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+					char test_tag[MAX_T(size_t, HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 
 					integrity_sector_checksum(ic, sec + ((l - j) << ic->sb->log2_sectors_per_block),
 								  (char *)access_journal_data(ic, i, l), test_tag);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 2478caeec763..21cc8cd9e023 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2805,7 +2805,7 @@ static void stmmac_dma_interrupt(struct stmmac_priv *priv)
 	u32 channels_to_check = tx_channel_count > rx_channel_count ?
 				tx_channel_count : rx_channel_count;
 	u32 chan;
-	int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
+	int status[MAX_T(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
 
 	/* Make sure we never check beyond our status buffer. */
 	if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status)))
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 4b9280a3b673..d849f61b7519 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -43,7 +43,7 @@
 #include <net/sock.h>
 #include <net/raw.h>
 
-#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
+#define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX)
 
 /*
  *	Report socket allocation statistics [[email-masked]]
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index d6306aa46bb1..e07c43bd5cb0 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -27,7 +27,7 @@
 #include <net/ipv6.h>
 
 #define MAX4(a, b, c, d) \
-	max_t(u32, max_t(u32, a, b), max_t(u32, c, d))
+	MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d))
 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
 			IPSTATS_MIB_MAX, ICMP_MIB_MAX)
 
-- 
2.47.3

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Subject: [PATCH 08/19 5.15.y] minmax: simplify and clarify min_t()/max_t() implementation
Date: Thu, 2 Oct 2025 20:47:22 +0000
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From: Linus Torvalds <[email-masked]>

commit 017fa3e89187848fd056af757769c9e66ac3e93d upstream.

This simplifies the min_t() and max_t() macros by no longer making them
work in the context of a C constant expression.

That means that you can no longer use them for static initializers or
for array sizes in type definitions, but there were only a couple of
such uses, and all of them were converted (famous last words) to use
MIN_T/MAX_T instead.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2a40d3550f28..fc384714da45 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -45,17 +45,20 @@
 
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
-#define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-	typeof(x) unique_x = (x);			\
-	typeof(y) unique_y = (y);			\
+#define __cmp_once_unique(op, type, x, y, ux, uy) \
+	({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
+
+#define __cmp_once(op, type, x, y) \
+	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
+
+#define __careful_cmp_once(op, x, y) ({			\
 	static_assert(__types_ok(x, y),			\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp(op, unique_x, unique_y); })
+	__cmp_once(op, __auto_type, x, y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y),				\
-		__cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y)))
+		__cmp(op, x, y), __careful_cmp_once(op, x, y))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
@@ -158,7 +161,7 @@
  * @x: first value
  * @y: second value
  */
-#define min_t(type, x, y)	__careful_cmp(min, (type)(x), (type)(y))
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
 
 /**
  * max_t - return maximum of two values, using the specified type
@@ -166,7 +169,7 @@
  * @x: first value
  * @y: second value
  */
-#define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH 09/19 5.15.y] minmax: simplify min()/max()/clamp() implementation
Date: Thu, 2 Oct 2025 20:47:23 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit dc1c8034e31b14a2e5e212104ec508aec44ce1b9 ]

Now that we no longer have any C constant expression contexts (ie array
size declarations or static initializers) that use min() or max(), we
can simpify the implementation by not having to worry about the result
staying as a C constant expression.

So now we can unconditionally just use temporary variables of the right
type, and get rid of the excessive expansion that used to come from the
use of

   __builtin_choose_expr(__is_constexpr(...), ..

to pick the specialized code for constant expressions.

Another expansion simplification is to pass the temporary variables (in
addition to the original expression) to our __types_ok() macro.  That
may superficially look like it complicates the macro, but when we only
want the type of the expression, expanding the temporary variable names
is much simpler and smaller than expanding the potentially complicated
original expression.

As a result, on my machine, doing a

  $ time make drivers/staging/media/atomisp/pci/isp/kernels/ynr/ynr_1.0/ia_css_ynr.host.i

goes from

	real	0m16.621s
	user	0m15.360s
	sys	0m1.221s

to

	real	0m2.532s
	user	0m2.091s
	sys	0m0.452s

because the token expansion goes down dramatically.

In particular, the longest line expansion (which was line 71 of that
'ia_css_ynr.host.c' file) shrinks from 23,338kB (yes, 23MB for one
single line) to "just" 1,444kB (now "only" 1.4MB).

And yes, that line is still the line from hell, because it's doing
multiple levels of "min()/max()" expansion thanks to some of them being
hidden inside the uDIGIT_FITTING() macro.

Lorenzo has a nice cleanup patch that makes that driver use inline
functions instead of macros for sDIGIT_FITTING() and uDIGIT_FITTING(),
which will fix that line once and for all, but the 16-fold reduction in
this case does show why we need to simplify these helpers.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 43 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index fc384714da45..e3e4353df983 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -35,10 +35,10 @@
 #define __is_noneg_int(x)	\
 	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
 
-#define __types_ok(x, y) 					\
-	(__is_signed(x) == __is_signed(y) ||			\
-		__is_signed((x) + 0) == __is_signed((y) + 0) ||	\
-		__is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok(x, y, ux, uy) 				\
+	(__is_signed(ux) == __is_signed(uy) ||			\
+	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
+	 __is_noneg_int(x) || __is_noneg_int(y))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -51,34 +51,31 @@
 #define __cmp_once(op, type, x, y) \
 	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __careful_cmp_once(op, x, y) ({			\
-	static_assert(__types_ok(x, y),			\
+#define __careful_cmp_once(op, x, y, ux, uy) ({		\
+	__auto_type ux = (x); __auto_type uy = (y);	\
+	static_assert(__types_ok(x, y, ux, uy),		\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp_once(op, __auto_type, x, y); })
+	__cmp(op, ux, uy); })
 
-#define __careful_cmp(op, x, y)					\
-	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y), __careful_cmp_once(op, x, y))
+#define __careful_cmp(op, x, y) \
+	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
-	typeof(val) unique_val = (val);						\
-	typeof(lo) unique_lo = (lo);						\
-	typeof(hi) unique_hi = (hi);						\
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-	__clamp(unique_val, unique_lo, unique_hi); })
-
-#define __careful_clamp(val, lo, hi) ({					\
-	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-		__clamp(val, lo, hi),					\
-		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
-			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
  * min - return minimum of two values of the same or compatible types
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, Lorenzo Stoakes
	<[email-masked]>, David Laight <[email-masked]>
Subject: [PATCH 05/19 5.15.y] minmax: avoid overly complicated constant expressions in VM code
Date: Thu, 2 Oct 2025 20:47:19 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 3a7e02c040b130b5545e4b115aada7bacd80a2b6 ]

The minmax infrastructure is overkill for simple constants, and can
cause huge expansions because those simple constants are then used by
other things.

For example, 'pageblock_order' is a core VM constant, but because it was
implemented using 'min_t()' and all the type-checking that involves, it
actually expanded to something like 2.5kB of preprocessor noise.

And when that simple constant was then used inside other expansions:

  #define pageblock_nr_pages      (1UL << pageblock_order)
  #define pageblock_start_pfn(pfn)  ALIGN_DOWN((pfn), pageblock_nr_pages)

and we then use that inside a 'max()' macro:

	case ISOLATE_SUCCESS:
		update_cached = false;
		last_migrated_pfn = max(cc->zone->zone_start_pfn,
			pageblock_start_pfn(cc->migrate_pfn - 1));

the end result was that one statement expanding to 253kB in size.

There are probably other cases of this, but this one case certainly
stood out.

I've added 'MIN_T()' and 'MAX_T()' macros for this kind of "core simple
constant with specific type" use.  These macros skip the type checking,
and as such need to be very sparingly used only for obvious cases that
have active issues like this.

Reported-by: Lorenzo Stoakes <[email-masked]>
Link: https://lore.kernel.org/all/[email-masked]/
Cc: David Laight <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2ec559284a9f..a7ef65f78933 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -270,4 +270,11 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
 #define swap(a, b) \
 	do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
 
+/*
+ * Use these carefully: no type checking, and uses the arguments
+ * multiple times. Use for obvious constants only.
+ */
+#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
+#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH 06/19 5.15.y] minmax: make generic MIN() and MAX() macros available everywhere
Date: Thu, 2 Oct 2025 20:47:20 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 1a251f52cfdc417c84411a056bc142cbd77baef4 ]

This just standardizes the use of MIN() and MAX() macros, with the very
traditional semantics.  The goal is to use these for C constant
expressions and for top-level / static initializers, and so be able to
simplify the min()/max() macros.

These macro names were used by various kernel code - they are very
traditional, after all - and all such users have been fixed up, with a
few different approaches:

 - trivial duplicated macro definitions have been removed

   Note that 'trivial' here means that it's obviously kernel code that
   already included all the major kernel headers, and thus gets the new
   generic MIN/MAX macros automatically.

 - non-trivial duplicated macro definitions are guarded with #ifndef

   This is the "yes, they define their own versions, but no, the include
   situation is not entirely obvious, and maybe they don't get the
   generic version automatically" case.

 - strange use case #1

   A couple of drivers decided that the way they want to describe their
   versioning is with

	#define MAJ 1
	#define MIN 2
	#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)

   which adds zero value and I just did my Alexander the Great
   impersonation, and rewrote that pointless Gordian knot as

	#define DRV_VERSION "1.2"

   instead.

 - strange use case #2

   A couple of drivers thought that it's a good idea to have a random
   'MIN' or 'MAX' define for a value or index into a table, rather than
   the traditional macro that takes arguments.

   These values were re-written as C enum's instead. The new
   function-line macros only expand when followed by an open
   parenthesis, and thus don't clash with enum use.

Happily, there weren't really all that many of these cases, and a lot of
users already had the pattern of using '#ifndef' guarding (or in one
case just using '#undef MIN') before defining their own private version
that does the same thing. I left such cases alone.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/um/drivers/mconsole_user.c               |  2 ++
 drivers/edac/skx_common.h                     |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |  2 ++
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |  2 ++
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    | 14 +++++++----
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |  2 ++
 drivers/gpu/drm/radeon/evergreen_cs.c         |  2 ++
 drivers/hwmon/adt7475.c                       | 24 +++++++++----------
 drivers/media/dvb-frontends/stv0367_priv.h    |  3 +++
 drivers/net/fjes/fjes_main.c                  |  4 +---
 drivers/nfc/pn544/i2c.c                       |  2 --
 drivers/platform/x86/sony-laptop.c            |  1 -
 drivers/scsi/isci/init.c                      |  6 +----
 .../pci/hive_isp_css_include/math_support.h   |  5 ----
 include/linux/minmax.h                        |  2 ++
 kernel/trace/preemptirq_delay_test.c          |  2 --
 lib/btree.c                                   |  1 -
 lib/decompress_unlzma.c                       |  2 ++
 lib/zstd/zstd_internal.h                      |  2 --
 mm/zsmalloc.c                                 |  1 -
 tools/testing/selftests/vm/mremap_test.c      |  2 ++
 21 files changed, 43 insertions(+), 39 deletions(-)

diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
index e24298a734be..a04cd13c6315 100644
--- a/arch/um/drivers/mconsole_user.c
+++ b/arch/um/drivers/mconsole_user.c
@@ -71,7 +71,9 @@ static struct mconsole_command *mconsole_parse(struct mc_request *req)
 	return NULL;
 }
 
+#ifndef MIN
 #define MIN(a,b) ((a)<(b) ? (a):(b))
+#endif
 
 #define STRINGX(x) #x
 #define STRING(x) STRINGX(x)
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index 13f761930b4f..1a78f18cf7fe 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -44,7 +44,6 @@
 #define I10NM_NUM_CHANNELS	MAX(I10NM_NUM_DDR_CHANNELS, I10NM_NUM_HBM_CHANNELS)
 #define I10NM_NUM_DIMMS		MAX(I10NM_NUM_DDR_DIMMS, I10NM_NUM_HBM_DIMMS)
 
-#define MAX(a, b)	((a) > (b) ? (a) : (b))
 #define NUM_IMC		MAX(SKX_NUM_IMC, I10NM_NUM_IMC)
 #define NUM_CHANNELS	MAX(SKX_NUM_CHANNELS, I10NM_NUM_CHANNELS)
 #define NUM_DIMMS	MAX(SKX_NUM_DIMMS, I10NM_NUM_DIMMS)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index dbef22f56482..1ee8663fd866 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1277,7 +1277,9 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 
 #define amdgpu_inc_vram_lost(adev) atomic_inc(&((adev)->vram_lost_counter));
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 /* Common functions */
 bool amdgpu_device_has_job_running(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
index 1b2df97226a3..40286e8dd4e1 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
@@ -25,7 +25,9 @@
 
 #include "hdcp.h"
 
+#ifndef MIN
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
 #define HDCP_I2C_ADDR 0x3a	/* 0x74 >> 1*/
 #define KSV_READ_SIZE 0xf	/* 0x6803b - 0x6802c */
 #define HDCP_MAX_AUX_TRANSACTION_SIZE 16
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
index dac29fe6cfc6..abbdb7731996 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h
@@ -22,12 +22,18 @@
  */
 #include <asm/div64.h>
 
-#define SHIFT_AMOUNT 16 /* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+enum ppevvmath_constants {
+	/* We multiply all original integers with 2^SHIFT_AMOUNT to get the fInt representation */
+	SHIFT_AMOUNT	= 16,
 
-#define PRECISION 5 /* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	/* Change this value to change the number of decimal places in the final output - 5 is a good default */
+	PRECISION	=  5,
 
-#define SHIFTED_2 (2 << SHIFT_AMOUNT)
-#define MAX (1 << (SHIFT_AMOUNT - 1)) - 1 /* 32767 - Might change in the future */
+	SHIFTED_2	= (2 << SHIFT_AMOUNT),
+
+	/* 32767 - Might change in the future */
+	MAX		= (1 << (SHIFT_AMOUNT - 1)) - 1,
+};
 
 /* -------------------------------------------------------------------------------
  * NEW TYPE - fINT
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index d4fde146bd4c..95894c25881a 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -1964,7 +1964,9 @@ static void sienna_cichlid_get_override_pcie_settings(struct smu_context *smu,
 	}
 }
 
+#ifndef MAX
 #define MAX(a, b)	((a) > (b) ? (a) : (b))
+#endif
 
 static int sienna_cichlid_update_pcie_parameters(struct smu_context *smu,
 					 uint32_t pcie_gen_cap,
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 820c2c3641d3..1311f10fad66 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -33,8 +33,10 @@
 #include "evergreen_reg_safe.h"
 #include "cayman_reg_safe.h"
 
+#ifndef MIN
 #define MAX(a,b)                   (((a)>(b))?(a):(b))
 #define MIN(a,b)                   (((a)<(b))?(a):(b))
+#endif
 
 #define REG_SAFE_BM_SIZE ARRAY_SIZE(evergreen_reg_safe_bm)
 
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index b4c0f01f52c4..1e0678eb0077 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -23,23 +23,23 @@
 #include <linux/util_macros.h>
 
 /* Indexes for the sysfs hooks */
-
-#define INPUT		0
-#define MIN		1
-#define MAX		2
-#define CONTROL		3
-#define OFFSET		3
-#define AUTOMIN		4
-#define THERM		5
-#define HYSTERSIS	6
-
+enum adt_sysfs_id {
+	INPUT		= 0,
+	MIN		= 1,
+	MAX		= 2,
+	CONTROL		= 3,
+	OFFSET		= 3,	// Dup
+	AUTOMIN		= 4,
+	THERM		= 5,
+	HYSTERSIS	= 6,
 /*
  * These are unique identifiers for the sysfs functions - unlike the
  * numbers above, these are not also indexes into an array
  */
+	ALARM		= 9,
+	FAULT		= 10,
+};
 
-#define ALARM		9
-#define FAULT		10
 
 /* 7475 Common Registers */
 
diff --git a/drivers/media/dvb-frontends/stv0367_priv.h b/drivers/media/dvb-frontends/stv0367_priv.h
index 617f605947b2..7f056d1cce82 100644
--- a/drivers/media/dvb-frontends/stv0367_priv.h
+++ b/drivers/media/dvb-frontends/stv0367_priv.h
@@ -25,8 +25,11 @@
 #endif
 
 /* MACRO definitions */
+#ifndef MIN
 #define MAX(X, Y) ((X) >= (Y) ? (X) : (Y))
 #define MIN(X, Y) ((X) <= (Y) ? (X) : (Y))
+#endif
+
 #define INRANGE(X, Y, Z) \
 	((((X) <= (Y)) && ((Y) <= (Z))) || \
 	(((Z) <= (Y)) && ((Y) <= (X))) ? 1 : 0)
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 1d1808afd529..792c22ba5b00 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -14,9 +14,7 @@
 #include "fjes.h"
 #include "fjes_trace.h"
 
-#define MAJ 1
-#define MIN 2
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
+#define DRV_VERSION "1.2"
 #define DRV_NAME	"fjes"
 char fjes_driver_name[] = DRV_NAME;
 char fjes_driver_version[] = DRV_VERSION;
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index 37d26f01986b..fd7026206f58 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -126,8 +126,6 @@ struct pn544_i2c_fw_secure_blob {
 #define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0
 #define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6
 
-#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
-
 #define PN544_FW_WRITE_BUFFER_MAX_LEN 0x9f7
 #define PN544_FW_I2C_MAX_PAYLOAD PN544_HCI_I2C_LLC_MAX_SIZE
 #define PN544_FW_I2C_WRITE_FRAME_HEADER_LEN 8
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 336dee9485d4..3c27d6b66bb4 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -757,7 +757,6 @@ static union acpi_object *__call_snc_method(acpi_handle handle, char *method,
 	return result;
 }
 
-#define MIN(a, b)	(a > b ? b : a)
 static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
 		void *buffer, size_t buflen)
 {
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index bd73f6925a9d..73144b2966ba 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -65,11 +65,7 @@
 #include "task.h"
 #include "probe_roms.h"
 
-#define MAJ 1
-#define MIN 2
-#define BUILD 0
-#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
-	__stringify(BUILD)
+#define DRV_VERSION "1.2.0"
 
 MODULE_VERSION(DRV_VERSION);
 
diff --git a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
index a444ec14ff9d..1c17a87a8572 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h
@@ -31,11 +31,6 @@
 /* A => B */
 #define IMPLIES(a, b)        (!(a) || (b))
 
-/* for preprocessor and array sizing use MIN and MAX
-   otherwise use min and max */
-#define MAX(a, b)            (((a) > (b)) ? (a) : (b))
-#define MIN(a, b)            (((a) < (b)) ? (a) : (b))
-
 #define ROUND_DIV(a, b)      (((b) != 0) ? ((a) + ((b) >> 1)) / (b) : 0)
 #define CEIL_DIV(a, b)       (((b) != 0) ? ((a) + (b) - 1) / (b) : 0)
 #define CEIL_MUL(a, b)       (CEIL_DIV(a, b) * (b))
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index a7ef65f78933..2a40d3550f28 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -274,6 +274,8 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
+#define MIN(a,b) __cmp(min,a,b)
+#define MAX(a,b) __cmp(max,a,b)
 #define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
 #define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
 
diff --git a/kernel/trace/preemptirq_delay_test.c b/kernel/trace/preemptirq_delay_test.c
index 8af92dbe98f0..acb0c971a408 100644
--- a/kernel/trace/preemptirq_delay_test.c
+++ b/kernel/trace/preemptirq_delay_test.c
@@ -34,8 +34,6 @@ MODULE_PARM_DESC(cpu_affinity, "Cpu num test is running on");
 
 static struct completion done;
 
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-
 static void busy_wait(ulong time)
 {
 	u64 start, end;
diff --git a/lib/btree.c b/lib/btree.c
index b4cf08a5c267..b12f99d4c45c 100644
--- a/lib/btree.c
+++ b/lib/btree.c
@@ -43,7 +43,6 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define NODESIZE MAX(L1_CACHE_BYTES, 128)
 
 struct btree_geo {
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 20a858031f12..9d34d35908da 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -37,7 +37,9 @@
 
 #include <linux/decompress/mm.h>
 
+#ifndef MIN
 #define	MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
 
 static long long INIT read_int(unsigned char *ptr, int size)
 {
diff --git a/lib/zstd/zstd_internal.h b/lib/zstd/zstd_internal.h
index dac753397f86..927ed4e8c11c 100644
--- a/lib/zstd/zstd_internal.h
+++ b/lib/zstd/zstd_internal.h
@@ -36,8 +36,6 @@
 /*-*************************************
 *  shared macros
 ***************************************/
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define CHECK_F(f)                       \
 	{                                \
 		size_t const errcod = f; \
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 79f389d620c9..fd01f6922874 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -126,7 +126,6 @@
 #define ISOLATED_BITS	3
 #define MAGIC_VAL_BITS	8
 
-#define MAX(a, b) ((a) >= (b) ? (a) : (b))
 /* ZS_MIN_ALLOC_SIZE must be multiple of ZS_ALIGN */
 #define ZS_MIN_ALLOC_SIZE \
 	MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS))
diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c
index 58775dab3cc6..92fb74865f26 100644
--- a/tools/testing/selftests/vm/mremap_test.c
+++ b/tools/testing/selftests/vm/mremap_test.c
@@ -22,7 +22,9 @@
 #define VALIDATION_DEFAULT_THRESHOLD 4	/* 4MB */
 #define VALIDATION_NO_THRESHOLD 0	/* Verify the entire region */
 
+#ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
 
 struct config {
 	unsigned long long src_alignment;
-- 
2.47.3

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CC: Andy Shevchenko <[email-masked]>, Christophe Leroy
	<[email-masked]>
Subject: [PATCH 02/19 5.15.y] minmax: Introduce {min,max}_array()
Date: Thu, 2 Oct 2025 20:47:16 +0000
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From: Herve Codina <[email-masked]>

[ Upstream commit c952c748c7a983a8bda9112984e6f2c1f6e441a5 ]

Introduce min_array() (resp max_array()) in order to get the
minimal (resp maximum) of values present in an array.

Signed-off-by: Herve Codina <[email-masked]>
Reviewed-by: Andy Shevchenko <[email-masked]>
Reviewed-by: Christophe Leroy <[email-masked]>
Link: https://lore.kernel.org/r/[email-masked]
Signed-off-by: Mark Brown <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index d4bc394b449e..aac0b7d23768 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,6 +168,70 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
+/*
+ * Remove a const qualifier from integer types
+ * _Generic(foo, type-name: association, ..., default: association) performs a
+ * comparison against the foo type (not the qualified type).
+ * Do not use the const keyword in the type-name as it will not match the
+ * unqualified type of foo.
+ */
+#define __unconst_integer_type_cases(type)	\
+	unsigned type:  (unsigned type)0,	\
+	signed type:    (signed type)0
+
+#define __unconst_integer_typeof(x) typeof(			\
+	_Generic((x),						\
+		char: (char)0,					\
+		__unconst_integer_type_cases(char),		\
+		__unconst_integer_type_cases(short),		\
+		__unconst_integer_type_cases(int),		\
+		__unconst_integer_type_cases(long),		\
+		__unconst_integer_type_cases(long long),	\
+		default: (x)))
+
+/*
+ * Do not check the array parameter using __must_be_array().
+ * In the following legit use-case where the "array" passed is a simple pointer,
+ * __must_be_array() will return a failure.
+ * --- 8< ---
+ * int *buff
+ * ...
+ * min = min_array(buff, nb_items);
+ * --- 8< ---
+ *
+ * The first typeof(&(array)[0]) is needed in order to support arrays of both
+ * 'int *buff' and 'int buff[N]' types.
+ *
+ * The array can be an array of const items.
+ * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * to discard the const qualifier for the __element variable.
+ */
+#define __minmax_array(op, array, len) ({				\
+	typeof(&(array)[0]) __array = (array);				\
+	typeof(len) __len = (len);					\
+	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	while (__len--)							\
+		__element = op(__element, __array[__len]);		\
+	__element; })
+
+/**
+ * min_array - return minimum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define min_array(array, len) __minmax_array(min, array, len)
+
+/**
+ * max_array - return maximum of values present in an array
+ * @array: array
+ * @len: array length
+ *
+ * Note that @len must not be zero (empty array).
+ */
+#define max_array(array, len) __minmax_array(max, array, len)
+
 /**
  * clamp_t - return a value clamped to a given range using a given type
  * @type: the type of variable to use
-- 
2.47.3

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Subject: [PATCH 03/19 5.15.y] minmax: deduplicate __unconst_integer_typeof()
Date: Thu, 2 Oct 2025 20:47:17 +0000
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From: Andy Shevchenko <[email-masked]>

[ Upstream commit 5e57418a2031cd5e1863efdf3d7447a16a368172 ]

It appears that compiler_types.h already have an implementation of the
__unconst_integer_typeof() called __unqual_scalar_typeof().  Use it
instead of the copy.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Andy Shevchenko <[email-masked]>
Acked-by: Herve Codina <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 25 ++-----------------------
 1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index aac0b7d23768..62b0c0a3cf30 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -168,27 +168,6 @@
  */
 #define max_t(type, x, y)	__careful_cmp(max, (type)(x), (type)(y))
 
-/*
- * Remove a const qualifier from integer types
- * _Generic(foo, type-name: association, ..., default: association) performs a
- * comparison against the foo type (not the qualified type).
- * Do not use the const keyword in the type-name as it will not match the
- * unqualified type of foo.
- */
-#define __unconst_integer_type_cases(type)	\
-	unsigned type:  (unsigned type)0,	\
-	signed type:    (signed type)0
-
-#define __unconst_integer_typeof(x) typeof(			\
-	_Generic((x),						\
-		char: (char)0,					\
-		__unconst_integer_type_cases(char),		\
-		__unconst_integer_type_cases(short),		\
-		__unconst_integer_type_cases(int),		\
-		__unconst_integer_type_cases(long),		\
-		__unconst_integer_type_cases(long long),	\
-		default: (x)))
-
 /*
  * Do not check the array parameter using __must_be_array().
  * In the following legit use-case where the "array" passed is a simple pointer,
@@ -203,13 +182,13 @@
  * 'int *buff' and 'int buff[N]' types.
  *
  * The array can be an array of const items.
- * typeof() keeps the const qualifier. Use __unconst_integer_typeof() in order
+ * typeof() keeps the const qualifier. Use __unqual_scalar_typeof() in order
  * to discard the const qualifier for the __element variable.
  */
 #define __minmax_array(op, array, len) ({				\
 	typeof(&(array)[0]) __array = (array);				\
 	typeof(len) __len = (len);					\
-	__unconst_integer_typeof(__array[0]) __element = __array[--__len]; \
+	__unqual_scalar_typeof(__array[0]) __element = __array[--__len];\
 	while (__len--)							\
 		__element = op(__element, __array[__len]);		\
 	__element; })
-- 
2.47.3

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CC: Christoph Hellwig <[email-masked]>, "Jason A. Donenfeld"
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Subject: [PATCH 04/19 5.15.y] minmax: fix indentation of __cmp_once() and __clamp_once()
Date: Thu, 2 Oct 2025 20:47:18 +0000
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From: David Laight <[email-masked]>

[ Upstream commit f4b84b2ff851f01d0fac619eadef47eb41648534 ]

Remove the extra indentation and align continuation markers.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Linus Torvalds <[email-masked]>
Cc: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 62b0c0a3cf30..2ec559284a9f 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,11 +46,11 @@
 #define __cmp(op, x, y)	((x) __cmp_op_##op (y) ? (x) : (y))
 
 #define __cmp_once(op, x, y, unique_x, unique_y) ({	\
-		typeof(x) unique_x = (x);		\
-		typeof(y) unique_y = (y);		\
-		static_assert(__types_ok(x, y),		\
-			#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-		__cmp(op, unique_x, unique_y); })
+	typeof(x) unique_x = (x);			\
+	typeof(y) unique_y = (y);			\
+	static_assert(__types_ok(x, y),			\
+		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	__cmp(op, unique_x, unique_y); })
 
 #define __careful_cmp(op, x, y)					\
 	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
@@ -60,16 +60,16 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({	\
-		typeof(val) unique_val = (val);				\
-		typeof(lo) unique_lo = (lo);				\
-		typeof(hi) unique_hi = (hi);				\
-		static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-				(lo) <= (hi), true),					\
-			"clamp() low limit " #lo " greater than high limit " #hi);	\
-		static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-		static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-		__clamp(unique_val, unique_lo, unique_hi); })
+#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
+	typeof(val) unique_val = (val);						\
+	typeof(lo) unique_lo = (lo);						\
+	typeof(hi) unique_hi = (hi);						\
+	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
+			(lo) <= (hi), true),					\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
+	__clamp(unique_val, unique_lo, unique_hi); })
 
 #define __careful_clamp(val, lo, hi) ({					\
 	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-- 
2.47.3

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Subject: [PATCH 00/19 5.15.y] Backport minmax.h updates from v6.17-rc7
Date: Thu, 2 Oct 2025 20:47:14 +0000
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This series backports 19 patches to update minmax.h in the 5.15.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes (6.12.y and 6.6.y were already
backported by me and are now aligned, 6.1.y is in progress).

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in kernel 5.10.y.

In mainline, this change enables min()/max()/clamp() to accept mixed 
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Andy Shevchenko (1):
  minmax: deduplicate __unconst_integer_typeof()

David Laight (8):
  minmax: fix indentation of __cmp_once() and __clamp_once()
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Herve Codina (1):
  minmax: Introduce {min,max}_array()

Linus Torvalds (8):
  minmax: avoid overly complicated constant expressions in VM code
  minmax: make generic MIN() and MAX() macros available everywhere
  minmax: add a few more MIN_T/MAX_T users
  minmax: simplify and clarify min_t()/max_t() implementation
  minmax: simplify min()/max()/clamp() implementation
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

Matthew Wilcox (Oracle) (1):
  minmax: add in_range() macro

 arch/arm/mm/pageattr.c                        |   6 +-
 arch/um/drivers/mconsole_user.c               |   2 +
 arch/x86/mm/pgtable.c                         |   2 +-
 drivers/edac/sb_edac.c                        |   4 +-
 drivers/edac/skx_common.h                     |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu.h           |   2 +
 .../drm/amd/display/modules/hdcp/hdcp_ddc.c   |   2 +
 .../drm/amd/pm/powerplay/hwmgr/ppevvmath.h    |  14 +-
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   |   2 +
 .../drm/arm/display/include/malidp_utils.h    |   2 +-
 .../display/komeda/komeda_pipeline_state.c    |  24 +-
 drivers/gpu/drm/drm_color_mgmt.c              |   2 +-
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |   6 -
 drivers/gpu/drm/radeon/evergreen_cs.c         |   2 +
 drivers/hwmon/adt7475.c                       |  24 +-
 drivers/input/touchscreen/cyttsp4_core.c      |   2 +-
 drivers/irqchip/irq-sun6i-r.c                 |   2 +-
 drivers/md/dm-integrity.c                     |   4 +-
 drivers/media/dvb-frontends/stv0367_priv.h    |   3 +
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   |  18 +-
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   2 +-
 drivers/net/fjes/fjes_main.c                  |   4 +-
 drivers/nfc/pn544/i2c.c                       |   2 -
 drivers/platform/x86/sony-laptop.c            |   1 -
 drivers/scsi/isci/init.c                      |   6 +-
 .../pci/hive_isp_css_include/math_support.h   |   5 -
 drivers/virt/acrn/ioreq.c                     |   4 +-
 fs/btrfs/misc.h                               |   2 -
 fs/btrfs/tree-checker.c                       |   2 +-
 fs/ext2/balloc.c                              |   2 -
 fs/ext4/ext4.h                                |   2 -
 fs/ufs/util.h                                 |   6 -
 include/linux/compiler.h                      |   9 +
 include/linux/minmax.h                        | 264 +++++++++++++-----
 kernel/trace/preemptirq_delay_test.c          |   2 -
 lib/btree.c                                   |   1 -
 lib/decompress_unlzma.c                       |   2 +
 lib/logic_pio.c                               |   3 -
 lib/vsprintf.c                                |   2 +-
 lib/zstd/zstd_internal.h                      |   2 -
 mm/zsmalloc.c                                 |   1 -
 net/ipv4/proc.c                               |   2 +-
 net/ipv6/proc.c                               |   2 +-
 net/netfilter/nf_nat_core.c                   |   6 +-
 net/tipc/core.h                               |   2 +-
 net/tipc/link.c                               |  10 +-
 tools/testing/selftests/vm/mremap_test.c      |   2 +
 47 files changed, 289 insertions(+), 183 deletions(-)

-- 
2.47.3

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Subject: [PATCH 01/19 5.15.y] minmax: add in_range() macro
Date: Thu, 2 Oct 2025 20:47:15 +0000
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From: "Matthew Wilcox (Oracle)" <[email-masked]>

[ Upstream commit f9bff0e31881d03badf191d3b0005839391f5f2b ]

Patch series "New page table range API", v6.

This patchset changes the API used by the MM to set up page table entries.
The four APIs are:

    set_ptes(mm, addr, ptep, pte, nr)
    update_mmu_cache_range(vma, addr, ptep, nr)
    flush_dcache_folio(folio)
    flush_icache_pages(vma, page, nr)

flush_dcache_folio() isn't technically new, but no architecture
implemented it, so I've done that for them.  The old APIs remain around
but are mostly implemented by calling the new interfaces.

The new APIs are based around setting up N page table entries at once.
The N entries belong to the same PMD, the same folio and the same VMA, so
ptep++ is a legitimate operation, and locking is taken care of for you.
Some architectures can do a better job of it than just a loop, but I have
hesitated to make too deep a change to architectures I don't understand
well.

One thing I have changed in every architecture is that PG_arch_1 is now a
per-folio bit instead of a per-page bit when used for dcache clean/dirty
tracking.  This was something that would have to happen eventually, and it
makes sense to do it now rather than iterate over every page involved in a
cache flush and figure out if it needs to happen.

The point of all this is better performance, and Fengwei Yin has measured
improvement on x86.  I suspect you'll see improvement on your architecture
too.  Try the new will-it-scale test mentioned here:
https://lore.kernel.org/linux-mm/[email-masked]/
You'll need to run it on an XFS filesystem and have
CONFIG_TRANSPARENT_HUGEPAGE set.

This patchset is the basis for much of the anonymous large folio work
being done by Ryan, so it's received quite a lot of testing over the last
few months.

This patch (of 38):

Determine if a value lies within a range more efficiently (subtraction +
comparison vs two comparisons and an AND).  It also has useful (under some
circumstances) behaviour if the range exceeds the maximum value of the
type.  Convert all the conflicting definitions of in_range() within the
kernel; some can use the generic definition while others need their own
definition.

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: Matthew Wilcox (Oracle) <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 arch/arm/mm/pageattr.c                        |  6 ++---
 .../drm/arm/display/include/malidp_utils.h    |  2 +-
 .../display/komeda/komeda_pipeline_state.c    | 24 ++++++++---------
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |  6 -----
 .../net/ethernet/chelsio/cxgb3/cxgb3_main.c   | 18 ++++++-------
 drivers/virt/acrn/ioreq.c                     |  4 +--
 fs/btrfs/misc.h                               |  2 --
 fs/ext2/balloc.c                              |  2 --
 fs/ext4/ext4.h                                |  2 --
 fs/ufs/util.h                                 |  6 -----
 include/linux/minmax.h                        | 27 +++++++++++++++++++
 lib/logic_pio.c                               |  3 ---
 net/netfilter/nf_nat_core.c                   |  6 ++---
 net/tipc/core.h                               |  2 +-
 net/tipc/link.c                               | 10 +++----
 15 files changed, 63 insertions(+), 57 deletions(-)

diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c
index 9790ae3a8c68..3b3bfa825fad 100644
--- a/arch/arm/mm/pageattr.c
+++ b/arch/arm/mm/pageattr.c
@@ -25,7 +25,7 @@ static int change_page_range(pte_t *ptep, unsigned long addr, void *data)
 	return 0;
 }
 
-static bool in_range(unsigned long start, unsigned long size,
+static bool range_in_range(unsigned long start, unsigned long size,
 	unsigned long range_start, unsigned long range_end)
 {
 	return start >= range_start && start < range_end &&
@@ -46,8 +46,8 @@ static int change_memory_common(unsigned long addr, int numpages,
 	if (!size)
 		return 0;
 
-	if (!in_range(start, size, MODULES_VADDR, MODULES_END) &&
-	    !in_range(start, size, VMALLOC_START, VMALLOC_END))
+	if (!range_in_range(start, size, MODULES_VADDR, MODULES_END) &&
+	    !range_in_range(start, size, VMALLOC_START, VMALLOC_END))
 		return -EINVAL;
 
 	data.set_mask = set_mask;
diff --git a/drivers/gpu/drm/arm/display/include/malidp_utils.h b/drivers/gpu/drm/arm/display/include/malidp_utils.h
index 49a1d7f3539c..9f83baac6ed8 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_utils.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h
@@ -35,7 +35,7 @@ static inline void set_range(struct malidp_range *rg, u32 start, u32 end)
 	rg->end   = end;
 }
 
-static inline bool in_range(struct malidp_range *rg, u32 v)
+static inline bool malidp_in_range(struct malidp_range *rg, u32 v)
 {
 	return (v >= rg->start) && (v <= rg->end);
 }
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
index c956fda918be..4aa527ca765b 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -305,12 +305,12 @@ komeda_layer_check_cfg(struct komeda_layer *layer,
 	if (komeda_fb_check_src_coords(kfb, src_x, src_y, src_w, src_h))
 		return -EINVAL;
 
-	if (!in_range(&layer->hsize_in, src_w)) {
+	if (!malidp_in_range(&layer->hsize_in, src_w)) {
 		DRM_DEBUG_ATOMIC("invalidate src_w %d.\n", src_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&layer->vsize_in, src_h)) {
+	if (!malidp_in_range(&layer->vsize_in, src_h)) {
 		DRM_DEBUG_ATOMIC("invalidate src_h %d.\n", src_h);
 		return -EINVAL;
 	}
@@ -452,14 +452,14 @@ komeda_scaler_check_cfg(struct komeda_scaler *scaler,
 	hsize_out = dflow->out_w;
 	vsize_out = dflow->out_h;
 
-	if (!in_range(&scaler->hsize, hsize_in) ||
-	    !in_range(&scaler->hsize, hsize_out)) {
+	if (!malidp_in_range(&scaler->hsize, hsize_in) ||
+	    !malidp_in_range(&scaler->hsize, hsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid horizontal sizes");
 		return -EINVAL;
 	}
 
-	if (!in_range(&scaler->vsize, vsize_in) ||
-	    !in_range(&scaler->vsize, vsize_out)) {
+	if (!malidp_in_range(&scaler->vsize, vsize_in) ||
+	    !malidp_in_range(&scaler->vsize, vsize_out)) {
 		DRM_DEBUG_ATOMIC("Invalid vertical sizes");
 		return -EINVAL;
 	}
@@ -574,13 +574,13 @@ komeda_splitter_validate(struct komeda_splitter *splitter,
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->hsize, dflow->in_w)) {
+	if (!malidp_in_range(&splitter->hsize, dflow->in_w)) {
 		DRM_DEBUG_ATOMIC("split in_w:%d is out of the acceptable range.\n",
 				 dflow->in_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&splitter->vsize, dflow->in_h)) {
+	if (!malidp_in_range(&splitter->vsize, dflow->in_h)) {
 		DRM_DEBUG_ATOMIC("split in_h: %d exceeds the acceptable range.\n",
 				 dflow->in_h);
 		return -EINVAL;
@@ -624,13 +624,13 @@ komeda_merger_validate(struct komeda_merger *merger,
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->hsize_merged, output->out_w)) {
+	if (!malidp_in_range(&merger->hsize_merged, output->out_w)) {
 		DRM_DEBUG_ATOMIC("merged_w: %d is out of the accepted range.\n",
 				 output->out_w);
 		return -EINVAL;
 	}
 
-	if (!in_range(&merger->vsize_merged, output->out_h)) {
+	if (!malidp_in_range(&merger->vsize_merged, output->out_h)) {
 		DRM_DEBUG_ATOMIC("merged_h: %d is out of the accepted range.\n",
 				 output->out_h);
 		return -EINVAL;
@@ -866,8 +866,8 @@ void komeda_complete_data_flow_cfg(struct komeda_layer *layer,
 	 * input/output range.
 	 */
 	if (dflow->en_scaling && scaler)
-		dflow->en_split = !in_range(&scaler->hsize, dflow->in_w) ||
-				  !in_range(&scaler->hsize, dflow->out_w);
+		dflow->en_split = !malidp_in_range(&scaler->hsize, dflow->in_w) ||
+				  !malidp_in_range(&scaler->hsize, dflow->out_w);
 }
 
 static bool merger_is_available(struct komeda_pipeline *pipe,
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index f1daa923f346..9215322fc915 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -676,12 +676,6 @@ struct block_header {
 	u32 data[];
 };
 
-/* this should be a general kernel helper */
-static int in_range(u32 addr, u32 start, u32 size)
-{
-	return addr >= start && addr < start + size;
-}
-
 static bool fw_block_mem(struct a6xx_gmu_bo *bo, const struct block_header *blk)
 {
 	if (!in_range(blk->addr, bo->iova, bo->size))
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 07568aa15873..3c3d8ffc3c8b 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -2135,7 +2135,7 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
 	.set_link_ksettings = set_link_ksettings,
 };
 
-static int in_range(int val, int lo, int hi)
+static int cxgb_in_range(int val, int lo, int hi)
 {
 	return val < 0 || (val <= hi && val >= lo);
 }
@@ -2171,19 +2171,19 @@ static int cxgb_siocdevprivate(struct net_device *dev,
 			return -EINVAL;
 		if (t.qset_idx >= SGE_QSETS)
 			return -EINVAL;
-		if (!in_range(t.intr_lat, 0, M_NEWTIMER) ||
-		    !in_range(t.cong_thres, 0, 255) ||
-		    !in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
+		if (!cxgb_in_range(t.intr_lat, 0, M_NEWTIMER) ||
+		    !cxgb_in_range(t.cong_thres, 0, 255) ||
+		    !cxgb_in_range(t.txq_size[0], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[1], MIN_TXQ_ENTRIES,
 			      MAX_TXQ_ENTRIES) ||
-		    !in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
+		    !cxgb_in_range(t.txq_size[2], MIN_CTRL_TXQ_ENTRIES,
 			      MAX_CTRL_TXQ_ENTRIES) ||
-		    !in_range(t.fl_size[0], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[0], MIN_FL_ENTRIES,
 			      MAX_RX_BUFFERS) ||
-		    !in_range(t.fl_size[1], MIN_FL_ENTRIES,
+		    !cxgb_in_range(t.fl_size[1], MIN_FL_ENTRIES,
 			      MAX_RX_JUMBO_BUFFERS) ||
-		    !in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
+		    !cxgb_in_range(t.rspq_size, MIN_RSPQ_ENTRIES,
 			      MAX_RSPQ_ENTRIES))
 			return -EINVAL;
 
diff --git a/drivers/virt/acrn/ioreq.c b/drivers/virt/acrn/ioreq.c
index 80b2e3f0e276..5446e5bbbff8 100644
--- a/drivers/virt/acrn/ioreq.c
+++ b/drivers/virt/acrn/ioreq.c
@@ -356,7 +356,7 @@ static bool handle_cf8cfc(struct acrn_vm *vm,
 	return is_handled;
 }
 
-static bool in_range(struct acrn_ioreq_range *range,
+static bool acrn_in_range(struct acrn_ioreq_range *range,
 		     struct acrn_io_request *req)
 {
 	bool ret = false;
@@ -394,7 +394,7 @@ static struct acrn_ioreq_client *find_ioreq_client(struct acrn_vm *vm,
 	list_for_each_entry(client, &vm->ioreq_clients, list) {
 		read_lock_bh(&client->range_lock);
 		list_for_each_entry(range, &client->range_list, list) {
-			if (in_range(range, req)) {
+			if (acrn_in_range(range, req)) {
 				found = client;
 				break;
 			}
diff --git a/fs/btrfs/misc.h b/fs/btrfs/misc.h
index 340f995652f2..5269923c8a7d 100644
--- a/fs/btrfs/misc.h
+++ b/fs/btrfs/misc.h
@@ -8,8 +8,6 @@
 #include <linux/math64.h>
 #include <linux/rbtree.h>
 
-#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
-
 static inline void cond_wake_up(struct wait_queue_head *wq)
 {
 	/*
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9bf086821eb3..1d9380c5523b 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -36,8 +36,6 @@
  */

-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb,
 					     unsigned int block_group,
 					     struct buffer_head ** bh)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index ed477af15b6b..3e5c91e8b036 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3830,8 +3830,6 @@ static inline void set_bitmap_uptodate(struct buffer_head *bh)
 	set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state);
 }
 
-#define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
-
 /* For ioend & aio unwritten conversion wait queues */
 #define EXT4_WQ_HASH_SZ		37
 #define ext4_ioend_wq(v)   (&ext4__ioend_wq[((unsigned long)(v)) %\
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 4931bec1a01c..89247193d96d 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -11,12 +11,6 @@
 #include <linux/fs.h>
 #include "swab.h"
 
-
-/*
- * some useful macros
- */
-#define in_range(b,first,len)	((b)>=(first)&&(b)<(first)+(len))
-
 /*
  * functions used for retyping
  */
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index dd52969698f7..d4bc394b449e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -5,6 +5,7 @@
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
 #include <linux/const.h>
+#include <linux/types.h>
 
 /*
  * min()/max()/clamp() macros must accomplish three things:
@@ -192,6 +193,32 @@
  */
 #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
+static inline bool in_range64(u64 val, u64 start, u64 len)
+{
+	return (val - start) < len;
+}
+
+static inline bool in_range32(u32 val, u32 start, u32 len)
+{
+	return (val - start) < len;
+}
+
+/**
+ * in_range - Determine if a value lies within a range.
+ * @val: Value to test.
+ * @start: First value in range.
+ * @len: Number of values in range.
+ *
+ * This is more efficient than "if (start <= val && val < (start + len))".
+ * It also gives a different answer if @start + @len overflows the size of
+ * the type by a sufficient amount to encompass @val.  Decide for yourself
+ * which behaviour you want, or prove that start + len never overflow.
+ * Do not blindly replace one form with the other.
+ */
+#define in_range(val, start, len)					\
+	((sizeof(start) | sizeof(len) | sizeof(val)) <= sizeof(u32) ?	\
+		in_range32(val, start, len) : in_range64(val, start, len))
+
 /**
  * swap - swap values of @a and @b
  * @a: first value
diff --git a/lib/logic_pio.c b/lib/logic_pio.c
index 07b4b9a1f54b..2ea564a40064 100644
--- a/lib/logic_pio.c
+++ b/lib/logic_pio.c
@@ -20,9 +20,6 @@
 static LIST_HEAD(io_range_list);
 static DEFINE_MUTEX(io_range_mutex);
 
-/* Consider a kernel general helper for this */
-#define in_range(b, first, len)        ((b) >= (first) && (b) < (first) + (len))
-
 /**
  * logic_pio_register_range - register logical PIO range for a host
  * @new_range: pointer to the IO range to be registered.
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index b776b3af78ca..1dd160b84d05 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -242,7 +242,7 @@ static bool l4proto_in_range(const struct nf_conntrack_tuple *tuple,
 /* If we source map this tuple so reply looks like reply_tuple, will
  * that meet the constraints of range.
  */
-static int in_range(const struct nf_conntrack_tuple *tuple,
+static int nf_in_range(const struct nf_conntrack_tuple *tuple,
 		    const struct nf_nat_range2 *range)
 {
 	/* If we are supposed to map IPs, then we must be in the
@@ -291,7 +291,7 @@ find_appropriate_src(struct net *net,
 				       &ct->tuplehash[IP_CT_DIR_REPLY].tuple);
 			result->dst = tuple->dst;
 
-			if (in_range(result, range))
+			if (nf_in_range(result, range))
 				return 1;
 		}
 	}
@@ -523,7 +523,7 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
 	if (maniptype == NF_NAT_MANIP_SRC &&
 	    !(range->flags & NF_NAT_RANGE_PROTO_RANDOM_ALL)) {
 		/* try the original tuple first */
-		if (in_range(orig_tuple, range)) {
+		if (nf_in_range(orig_tuple, range)) {
 			if (!nf_nat_used_tuple(orig_tuple, ct)) {
 				*tuple = *orig_tuple;
 				return;
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 0a3f7a70a50a..7eccd97e0609 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -197,7 +197,7 @@ static inline int less(u16 left, u16 right)
 	return less_eq(left, right) && (mod(right) != mod(left));
 }
 
-static inline int in_range(u16 val, u16 min, u16 max)
+static inline int tipc_in_range(u16 val, u16 min, u16 max)
 {
 	return !less(val, min) && !more(val, max);
 }
diff --git a/net/tipc/link.c b/net/tipc/link.c
index b098b74516d1..c8433ec7661d 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1623,7 +1623,7 @@ static int tipc_link_advance_transmq(struct tipc_link *l, struct tipc_link *r,
 					  last_ga->bgack_cnt);
 			}
 			/* Check against the last Gap ACK block */
-			if (in_range(seqno, start, end))
+			if (tipc_in_range(seqno, start, end))
 				continue;
 			/* Update/release the packet peer is acking */
 			bc_has_acked = true;
@@ -2251,12 +2251,12 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		strncpy(if_name, data, TIPC_MAX_IF_NAME);
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own priority if peer's priority is higher */
-		if (in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
+		if (tipc_in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI))
 			l->priority = peers_prio;
 
 		/* If peer is going down we want full re-establish cycle */
@@ -2299,13 +2299,13 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
 		l->rcv_nxt_state = msg_seqno(hdr) + 1;
 
 		/* Update own tolerance if peer indicates a non-zero value */
-		if (in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
+		if (tipc_in_range(peers_tol, TIPC_MIN_LINK_TOL, TIPC_MAX_LINK_TOL)) {
 			l->tolerance = peers_tol;
 			l->bc_rcvlink->tolerance = peers_tol;
 		}
 		/* Update own prio if peer indicates a different value */
 		if ((peers_prio != l->priority) &&
-		    in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
+		    tipc_in_range(peers_prio, 1, TIPC_MAX_LINK_PRI)) {
 			l->priority = peers_prio;
 			rc = tipc_link_fsm_evt(l, LINK_FAILURE_EVT);
 		}
-- 
2.47.3

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Subject: [PATCH v3 11/11 6.1.y] minmax.h: remove some #defines that are only expanded once
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From: David Laight <[email-masked]>

[ Upstream commit 2b97aaf74ed534fb838d09867d09a3ca5d795208 ]

The bodies of __signed_type_use() and __unsigned_type_use() are much the
same size as their names - so put the bodies in the only line that expands
them.

Similarly __signed_type() is defined separately for 64bit and then used
exactly once just below.

Change the test for __signed_type from CONFIG_64BIT to one based on gcc
defined macros so that the code is valid if it gets used outside of a
kernel build.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 2bbdd5b5e07e..eaaf5c008e4d 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,8 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(ux) (2 + __is_nonneg(ux))
-#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
 #define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(ux) : __unsigned_type_use(ux))
+	(2 + __is_nonneg(ux)) : (1 + 2 * (sizeof(ux) < 4)))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -57,7 +55,7 @@
  * A cast is needed to avoid any warnings from values that aren't signed
  * integer types (in which case the result doesn't matter).
  *
- * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * On 64-bit any integer or pointer type can safely be cast to 'long long'.
  * But on 32-bit we need to avoid warnings about casting pointers to integers
  * of different sizes without truncating 64-bit values so 'long' or 'long long'
  * must be used depending on the size of the value.
@@ -66,12 +64,12 @@
  * them, but we do not use s128 types in the kernel (we do use 'u128',
  * but they are handled by the !is_signed_type() case).
  */
-#ifdef CONFIG_64BIT
-  #define __signed_type(ux) long
+#if __SIZEOF_POINTER__ == __SIZEOF_LONG_LONG__
+#define __is_nonneg(ux) statically_true((long long)(ux) >= 0)
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
+#define __is_nonneg(ux) statically_true( \
+	(typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L)))(ux) >= 0)
 #endif
-#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
 #define __types_ok(ux, uy) \
 	(__sign_use(ux) & __sign_use(uy))
-- 
2.47.3

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Date: Thu, 2 Oct 2025 11:10:34 -0700
Subject: Re: [PATCH RESEND] PCI/AER: Check for NULL aer_info before
 ratelimiting in pci_print_aer()
To: Christophe Leroy <[email-masked]>,
 Breno Leitao <[email-masked]>, Mahesh J Salgaonkar
 <[email-masked]>, Oliver O'Halloran <[email-masked]>,
 Bjorn Helgaas <[email-masked]>, Jon Pan-Doh <[email-masked]>
Cc: [email-masked], [email-masked],
 [email-masked], [email-masked], [email-masked]
From: Kuppuswamy Sathyanarayanan <[email-masked]>
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On 10/2/25 03:06, Christophe Leroy wrote:
>
>
> Le 29/09/2025 à 17:10, Sathyanarayanan Kuppuswamy a écrit :
>>
>> On 9/29/25 2:15 AM, Breno Leitao wrote:
>>> Similarly to pci_dev_aer_stats_incr(), pci_print_aer() may be called
>>> when dev->aer_info is NULL. Add a NULL check before proceeding to avoid
>>> calling aer_ratelimit() with a NULL aer_info pointer, returning 1, which
>>> does not rate limit, given this is fatal.
>>>
>>> This prevents a kernel crash triggered by dereferencing a NULL pointer
>>> in aer_ratelimit(), ensuring safer handling of PCI devices that lack
>>> AER info. This change aligns pci_print_aer() with pci_dev_aer_stats_incr()
>>> which already performs this NULL check.
>>>
>>> Cc: [email-masked]
>>> Fixes: a57f2bfb4a5863 ("PCI/AER: Ratelimit correctable and non-fatal error logging")
>>> Signed-off-by: Breno Leitao <[email-masked]>
>>> ---
>>> - This problem is still happening in upstream, and unfortunately no action
>>>    was done in the previous discussion.
>>> - Link to previous post:
>>>    https://eur01.safelinks.protection.outlook.com/? url=https%3A%2F%2Flore.kernel.org%2Fr%2F20250804-aer_crash_2-v1-1- fd06562c18a4%40debian.org&data=05%7C02%7Cchristophe.leroy2%40cs- soprasteria.com%7Cfd3d2f1b4e8448a8e67608ddff6a4e70%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638947554250805439%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=6yTN1%2Fq%2Fy0VKX%2BXpE%2BiKxBrn19AkY4IPj01N2ZdxEkg%3D&reserved=0
>>> ---
>>
>> Although we haven't identified the path that triggers this issue, adding this check is harmless.
>
> Is it really harmless ?
>
> The purpose of the function is to ratelimit logs. Here by returning 1 when dev->aer_info is NULL it says: don't ratelimit. Isn't it an opened door to Denial of Service by overloading with logs ?

We only skip rate limiting when dev->aer_info is NULL, which happens for
devices without AER capability. In that case, I think the trade-off is reasonable:
generating more logs is better than triggering a NULL pointer exception.

Also, this approach is consistent with other functions (for example, the stat
collection helpers) that already perform similar checks before accessing
aer_info. So extending the same safeguard here seems acceptable to me.

>
> Christophe
>
>>
>> Reviewed-by: Kuppuswamy Sathyanarayanan <[email-masked]>
>>
>>
>>
>>>   drivers/pci/pcie/aer.c | 3 +++
>>>   1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
>>> index e286c197d7167..55abc5e17b8b1 100644
>>> --- a/drivers/pci/pcie/aer.c
>>> +++ b/drivers/pci/pcie/aer.c
>>> @@ -786,6 +786,9 @@ static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
>>>   static int aer_ratelimit(struct pci_dev *dev, unsigned int severity)
>>>   {
>>> +    if (!dev->aer_info)
>>> +        return 1;
>>> +
>>>       switch (severity) {
>>>       case AER_NONFATAL:
>>>           return __ratelimit(&dev->aer_info->nonfatal_ratelimit);
>>>
>>> ---
>>> base-commit: e5f0a698b34ed76002dc5cff3804a61c80233a7a
>>> change-id: 20250801-aer_crash_2-b21cc2ef0d00
>>>
>>> Best regards,
>>> -- 
>>> Breno Leitao <[email-masked]>
>>>
>
>

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Subject: Re: [PATCH v1] ALSA: hda/tas2781: Fix a potential race condition
 that causes a NULL pointer in case no efi.get_variable exsits
From: Gergo Koteles <[email-masked]>
To: Shenghao Ding <[email-masked]>, [email-masked]
Cc: [email-masked], [email-masked],
  [email-masked], [email-masked],
  [email-masked], [email-masked],
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Date: Thu, 02 Oct 2025 21:27:46 +0200
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Cc: <[email-masked]>

On Thu, 2025-09-11 at 15:11 +0800, Shenghao Ding wrote:
> A a potential race condition reported by one of my customers that leads t=
o
> a NULL pointer dereference, where the call to efi.get_variable should be
> guarded with efi_rt_services_supported() to ensure that function exists.
>=20
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-=
data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <[email-masked]>
> ---
>  sound/hda/codecs/side-codecs/tas2781_hda.c     | 5 +++++
>  sound/hda/codecs/side-codecs/tas2781_hda_i2c.c | 5 +++++
>  2 files changed, 10 insertions(+)
>=20
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda.c b/sound/hda/codec=
s/side-codecs/tas2781_hda.c
> index 536940c78f00..96e6d82dc69e 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda.c
> @@ -193,6 +193,11 @@ int tas2781_save_calibration(struct tas2781_hda *hda=
)
>  	efi_status_t status;
>  	int i;
> =20
> +	if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) {
> +		dev_err(p->dev, "%s: NO EFI FOUND!\n", __func__);
> +		return -EINVAL;
> +	}
> +
>  	if (hda->catlog_id < LENOVO)
>  		efi_guid =3D tasdev_fct_efi_guid[hda->catlog_id];
> =20
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c b/sound/hda/c=
odecs/side-codecs/tas2781_hda_i2c.c
> index 008dbe1490a7..4dea442d8c30 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda_i2c.c
> @@ -317,6 +317,11 @@ static int tas2563_save_calibration(struct tas2781_h=
da *h)
>  	unsigned int attr;
>  	int ret, i, j, k;
> =20
> +	if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) {
> +		dev_err(p->dev, "%s: NO EFI FOUND!\n", __func__);
> +		return -EINVAL;
> +	}
> +
>  	cd->cali_dat_sz_per_dev =3D TAS2563_CAL_DATA_SIZE * TASDEV_CALIB_N;
> =20
>  	/* extra byte for each device is the device number */

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Subject: Re: [PATCH v4] ALSA: hda/tas2781: Fix the order of TAS2781
 calibrated-data
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To: Shenghao Ding <[email-masked]>, [email-masked]
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Cc: <[email-masked]>

On Mon, 2025-09-08 at 06:27 +0800, Shenghao Ding wrote:
> A bug reported by one of my customers that the order of TAS2781
> calibrated-data is incorrect, the correct way is to move R0_Low
> and insert it between R0 and InvR0.
>=20
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-=
data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <[email-masked]>
>=20
> ---
> v4:
>  - Add missing base into cali_cnv().
> v3:
>  - Take Tiwai's advice on cali_cnv() to make it more simpler.
> v2:
>  - Submit to the sound branch maintained by Tiwai instead of linux-next
>    branch
>  - Drop other fix
> ---
>  sound/hda/codecs/side-codecs/tas2781_hda.c | 25 +++++++++++++++++-----
>  1 file changed, 20 insertions(+), 5 deletions(-)
>=20
> diff --git a/sound/hda/codecs/side-codecs/tas2781_hda.c b/sound/hda/codec=
s/side-codecs/tas2781_hda.c
> index f46d2e06c64f..536940c78f00 100644
> --- a/sound/hda/codecs/side-codecs/tas2781_hda.c
> +++ b/sound/hda/codecs/side-codecs/tas2781_hda.c
> @@ -33,6 +33,23 @@ const efi_guid_t tasdev_fct_efi_guid[] =3D {
>  };
>  EXPORT_SYMBOL_NS_GPL(tasdev_fct_efi_guid, "SND_HDA_SCODEC_TAS2781");
> =20
> +/*
> + * The order of calibrated-data writing function is a bit different from=
 the
> + * order in UEFI. Here is the conversion to match the order of calibrate=
d-data
> + * writing function.
> + */
> +static void cali_cnv(unsigned char *data, unsigned int base, int offset)
> +{
> +	struct cali_reg reg_data;
> +
> +	memcpy(&reg_data, &data[base], sizeof(reg_data));
> +	/* the data order has to be swapped between r0_low_reg and inv0_reg */
> +	swap(reg_data.r0_low_reg, reg_data.invr0_reg);
> +
> +	cpu_to_be32_array((__force __be32 *)(data + offset + 1),
> +		(u32 *)&reg_data, TASDEV_CALIB_N);
> +}
> +
>  static void tas2781_apply_calib(struct tasdevice_priv *p)
>  {
>  	struct calidata *cali_data =3D &p->cali_data;
> @@ -103,8 +120,7 @@ static void tas2781_apply_calib(struct tasdevice_priv=
 *p)
> =20
>  				data[l] =3D k;
>  				oft++;
> -				for (i =3D 0; i < TASDEV_CALIB_N * 4; i++)
> -					data[l + i + 1] =3D data[4 * oft + i];
> +				cali_cnv(data, 4 * oft, l);
>  				k++;
>  			}
>  		}
> @@ -130,9 +146,8 @@ static void tas2781_apply_calib(struct tasdevice_priv=
 *p)
> =20
>  		for (j =3D p->ndev - 1; j >=3D 0; j--) {
>  			l =3D j * (cali_data->cali_dat_sz_per_dev + 1);
> -			for (i =3D TASDEV_CALIB_N * 4; i > 0 ; i--)
> -				data[l + i] =3D data[p->index * 5 + i];
> -			data[l+i] =3D j;
> +			cali_cnv(data, cali_data->cali_dat_sz_per_dev * j, l);
> +			data[l] =3D j;
>  		}
>  	}
> =20

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
 Wilcox" <[email-masked]>, Pedro Falcato <[email-masked]>
Subject: [PATCH v3 08/11 6.1.y] minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
Date: Thu, 2 Oct 2025 18:00:26 +0000
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SpamTally: Final spam score: 5

From: David Laight <[email-masked]>

[ Upstream commit a5743f32baec4728711bbc01d6ac2b33d4c67040 ]

Use BUILD_BUG_ON_MSG(statically_true(ulo > uhi), ...) for the sanity check
of the bounds in clamp().  Gives better error coverage and one less
expansion of the arguments.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 6f7ea669d305..91aa1b90c1bb 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -106,8 +106,7 @@
 	__auto_type uval = (val);						\
 	__auto_type ulo = (lo);							\
 	__auto_type uhi = (hi);							\
-	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
-			(lo) <= (hi), true),					\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
-- 
2.47.3

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Subject: [PATCH v3 10/11 6.1.y] minmax.h: simplify the variants of clamp()
Date: Thu, 2 Oct 2025 18:00:28 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 495bba17cdf95e9703af1b8ef773c55ef0dfe703 ]

Always pass a 'type' through to __clamp_once(), pass '__auto_type' from
clamp() itself.

The expansion of __types_ok3() is reasonable so it isn't worth the added
complexity of avoiding it when a fixed type is used for all three values.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 75fb7a6ad4c6..2bbdd5b5e07e 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -183,29 +183,29 @@
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
+#define __clamp_once(type, val, lo, hi, uval, ulo, uhi) ({			\
+	type uval = (val);							\
+	type ulo = (lo);							\
+	type uhi = (hi);							\
 	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
 	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+#define __careful_clamp(type, val, lo, hi) \
+	__clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
- * clamp - return a value clamped to a given range with strict typechecking
+ * clamp - return a value clamped to a given range with typechecking
  * @val: current value
  * @lo: lowest allowable value
  * @hi: highest allowable value
  *
- * This macro does strict typechecking of @lo/@hi to make sure they are of the
- * same type as @val.  See the unnecessary pointer comparisons.
+ * This macro checks @val/@lo/@hi to make sure they have compatible
+ * signedness.
  */
-#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
+#define clamp(val, lo, hi) __careful_clamp(__auto_type, val, lo, hi)
 
 /**
  * clamp_t - return a value clamped to a given range using a given type
@@ -217,7 +217,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
+#define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi)
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
@@ -230,7 +230,7 @@
  * type and @lo and @hi are literals that will otherwise be assigned a signed
  * integer type.
  */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+#define clamp_val(val, lo, hi) __careful_clamp(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
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Subject: [PATCH v3 09/11 6.1.y] minmax.h: move all the clamp() definitions after the min/max() ones
Date: Thu, 2 Oct 2025 18:00:27 +0000
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From: David Laight <[email-masked]>

[ Upstream commit c3939872ee4a6b8bdcd0e813c66823b31e6e26f7 ]

At some point the definitions for clamp() got added in the middle of the
ones for min() and max().  Re-order the definitions so they are more
sensibly grouped.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 109 +++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 58 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 91aa1b90c1bb..75fb7a6ad4c6 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -99,22 +99,6 @@
 #define __careful_cmp(op, x, y) \
 	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __clamp(val, lo, hi)	\
-	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
-
-#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
-	__auto_type uval = (val);						\
-	__auto_type ulo = (lo);							\
-	__auto_type uhi = (hi);							\
-	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
-		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
-		"clamp("#val", "#lo", "#hi") signedness error");		\
-	__clamp(uval, ulo, uhi); })
-
-#define __careful_clamp(val, lo, hi) \
-	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
-
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -170,6 +154,22 @@
 #define max3(x, y, z) \
 	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
+/**
+ * min_t - return minimum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define min_t(type, x, y) __cmp_once(min, type, x, y)
+
+/**
+ * max_t - return maximum of two values, using the specified type
+ * @type: data type to use
+ * @x: first value
+ * @y: second value
+ */
+#define max_t(type, x, y) __cmp_once(max, type, x, y)
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1
@@ -180,6 +180,22 @@
 	typeof(y) __y = (y);			\
 	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
+	BUILD_BUG_ON_MSG(statically_true(ulo > uhi),				\
+		"clamp() low limit " #lo " greater than high limit " #hi);	\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
@@ -191,28 +207,30 @@
  */
 #define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
-/*
- * ..and if you can't take the strict
- * types, you can specify one yourself.
- *
- * Or not use min/max/clamp at all, of course.
- */
-
 /**
- * min_t - return minimum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_t - return a value clamped to a given range using a given type
+ * @type: the type of variable to use
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of type
+ * @type to make all the comparisons.
  */
-#define min_t(type, x, y) __cmp_once(min, type, x, y)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
- * max_t - return maximum of two values, using the specified type
- * @type: data type to use
- * @x: first value
- * @y: second value
+ * clamp_val - return a value clamped to a given range using val's type
+ * @val: current value
+ * @lo: minimum allowable value
+ * @hi: maximum allowable value
+ *
+ * This macro does no typechecking and uses temporary variables of whatever
+ * type the input argument @val is.  This is useful when @val is an unsigned
+ * type and @lo and @hi are literals that will otherwise be assigned a signed
+ * integer type.
  */
-#define max_t(type, x, y) __cmp_once(max, type, x, y)
+#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
 
 /*
  * Do not check the array parameter using __must_be_array().
@@ -257,31 +275,6 @@
  */
 #define max_array(array, len) __minmax_array(max, array, len)
 
-/**
- * clamp_t - return a value clamped to a given range using a given type
- * @type: the type of variable to use
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of type
- * @type to make all the comparisons.
- */
-#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
-
-/**
- * clamp_val - return a value clamped to a given range using val's type
- * @val: current value
- * @lo: minimum allowable value
- * @hi: maximum allowable value
- *
- * This macro does no typechecking and uses temporary variables of whatever
- * type the input argument @val is.  This is useful when @val is an unsigned
- * type and @lo and @hi are literals that will otherwise be assigned a signed
- * integer type.
- */
-#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
-
 static inline bool in_range64(u64 val, u64 start, u64 len)
 {
 	return (val - start) < len;
-- 
2.47.3

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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
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Subject: [PATCH v3 06/11 6.1.y] minmax.h: update some comments
Date: Thu, 2 Oct 2025 18:00:24 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 10666e99204818ef45c702469488353b5bb09ec7 ]

- Change three to several.
- Remove the comment about retaining constant expressions, no longer true.
- Realign to nearer 80 columns and break on major punctiation.
- Add a leading comment to the block before __signed_type() and __is_nonneg()
  Otherwise the block explaining the cast is a bit 'floating'.
  Reword the rest of that comment to improve readability.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 53 +++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 51b0d988e322..24e4b372649a 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 
 /*
- * min()/max()/clamp() macros must accomplish three things:
+ * min()/max()/clamp() macros must accomplish several things:
  *
  * - Avoid multiple evaluations of the arguments (so side-effects like
  *   "x++" happen only once) when non-constant.
- * - Retain result as a constant expressions when called with only
- *   constant expressions (to avoid tripping VLA warnings in stack
- *   allocation usage).
  * - Perform signed v unsigned type-checking (to generate compile
  *   errors instead of nasty runtime surprises).
  * - Unsigned char/short are always promoted to signed int and can be
@@ -31,25 +28,23 @@
  *   bit #0 set if ok for unsigned comparisons
  *   bit #1 set if ok for signed comparisons
  *
- * In particular, statically non-negative signed integer
- * expressions are ok for both.
+ * In particular, statically non-negative signed integer expressions
+ * are ok for both.
  *
- * NOTE! Unsigned types smaller than 'int' are implicitly
- * converted to 'int' in expressions, and are accepted for
- * signed conversions for now. This is debatable.
+ * NOTE! Unsigned types smaller than 'int' are implicitly converted to 'int'
+ * in expressions, and are accepted for signed conversions for now.
+ * This is debatable.
  *
- * Note that 'x' is the original expression, and 'ux' is
- * the unique variable that contains the value.
+ * Note that 'x' is the original expression, and 'ux' is the unique variable
+ * that contains the value.
  *
- * We use 'ux' for pure type checking, and 'x' for when
- * we need to look at the value (but without evaluating
- * it for side effects! Careful to only ever evaluate it
- * with sizeof() or __builtin_constant_p() etc).
+ * We use 'ux' for pure type checking, and 'x' for when we need to look at the
+ * value (but without evaluating it for side effects!
+ * Careful to only ever evaluate it with sizeof() or __builtin_constant_p() etc).
  *
- * Pointers end up being checked by the normal C type
- * rules at the actual comparison, and these expressions
- * only need to be careful to not cause warnings for
- * pointer use.
+ * Pointers end up being checked by the normal C type rules at the actual
+ * comparison, and these expressions only need to be careful to not cause
+ * warnings for pointer use.
  */
 #define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
 #define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
@@ -57,19 +52,19 @@
 	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
- * To avoid warnings about casting pointers to integers
- * of different sizes, we need that special sign type.
+ * Check whether a signed value is always non-negative.
  *
- * On 64-bit we can just always use 'long', since any
- * integer or pointer type can just be cast to that.
+ * A cast is needed to avoid any warnings from values that aren't signed
+ * integer types (in which case the result doesn't matter).
  *
- * This does not work for 128-bit signed integers since
- * the cast would truncate them, but we do not use s128
- * types in the kernel (we do use 'u128', but they will
- * be handled by the !is_signed_type() case).
+ * On 64-bit any integer or pointer type can safely be cast to 'long'.
+ * But on 32-bit we need to avoid warnings about casting pointers to integers
+ * of different sizes without truncating 64-bit values so 'long' or 'long long'
+ * must be used depending on the size of the value.
  *
- * NOTE! The cast is there only to avoid any warnings
- * from when values that aren't signed integer types.
+ * This does not work for 128-bit signed integers since the cast would truncate
+ * them, but we do not use s128 types in the kernel (we do use 'u128',
+ * but they are handled by the !is_signed_type() case).
  */
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
-- 
2.47.3

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Subject: [PATCH v3 05/11 6.1.y] minmax.h: add whitespace around operators and after commas
Date: Thu, 2 Oct 2025 18:00:23 +0000
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From: David Laight <[email-masked]>

[ Upstream commit 71ee9b16251ea4bf7c1fe222517c82bdb3220acc ]

Patch series "minmax.h: Cleanups and minor optimisations".

Some tidyups and minor changes to minmax.h.

This patch (of 7):

Link: https://lkml.kernel.org/r/[email-masked]
Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 98008dd92153..51b0d988e322 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -51,10 +51,10 @@
  * only need to be careful to not cause warnings for
  * pointer use.
  */
-#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
-#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
-#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
-	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
+#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
 
 /*
  * To avoid warnings about casting pointers to integers
@@ -74,15 +74,15 @@
 #ifdef CONFIG_64BIT
   #define __signed_type(ux) long
 #else
-  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
+#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
 
-#define __types_ok(x,y,ux,uy) \
-	(__sign_use(x,ux) & __sign_use(y,uy))
+#define __types_ok(x, y, ux, uy) \
+	(__sign_use(x, ux) & __sign_use(y, uy))
 
-#define __types_ok3(x,y,z,ux,uy,uz) \
-	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
+#define __types_ok3(x, y, z, ux, uy, uz) \
+	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -97,7 +97,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -114,7 +114,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -154,7 +154,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
@@ -326,9 +326,9 @@ static inline bool in_range32(u32 val, u32 start, u32 len)
  * Use these carefully: no type checking, and uses the arguments
  * multiple times. Use for obvious constants only.
  */
-#define MIN(a,b) __cmp(min,a,b)
-#define MAX(a,b) __cmp(max,a,b)
-#define MIN_T(type,a,b) __cmp(min,(type)(a),(type)(b))
-#define MAX_T(type,a,b) __cmp(max,(type)(a),(type)(b))
+#define MIN(a, b) __cmp(min, a, b)
+#define MAX(a, b) __cmp(max, a, b)
+#define MIN_T(type, a, b) __cmp(min, (type)(a), (type)(b))
+#define MAX_T(type, a, b) __cmp(max, (type)(a), (type)(b))
 
 #endif	/* _LINUX_MINMAX_H */
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
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CC: Arnd Bergmann <[email-masked]>, Christoph Hellwig <[email-masked]>,
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	<[email-masked]>, Mateusz Guzik <[email-masked]>, "Matthew
 Wilcox" <[email-masked]>, Pedro Falcato <[email-masked]>
Subject: [PATCH v3 07/11 6.1.y] minmax.h: reduce the #define expansion of min(), max() and clamp()
Date: Thu, 2 Oct 2025 18:00:25 +0000
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From: David Laight <[email-masked]>

[ Upstream commit b280bb27a9f7c91ddab730e1ad91a9c18a051f41 ]

Since the test for signed values being non-negative only relies on
__builtion_constant_p() (not is_constexpr()) it can use the 'ux' variable
instead of the caller supplied expression.  This means that the #define
parameters are only expanded twice.  Once in the code and once quoted in
the error message.

Link: https://lkml.kernel.org/r/[email-masked]
Signed-off-by: David Laight <[email-masked]>
Cc: Andy Shevchenko <[email-masked]>
Cc: Arnd Bergmann <[email-masked]>
Cc: Christoph Hellwig <[email-masked]>
Cc: Dan Carpenter <[email-masked]>
Cc: Jason A. Donenfeld <[email-masked]>
Cc: Jens Axboe <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Cc: Mateusz Guzik <[email-masked]>
Cc: Matthew Wilcox <[email-masked]>
Cc: Pedro Falcato <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 24e4b372649a..6f7ea669d305 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -46,10 +46,10 @@
  * comparison, and these expressions only need to be careful to not cause
  * warnings for pointer use.
  */
-#define __signed_type_use(x, ux) (2 + __is_nonneg(x, ux))
-#define __unsigned_type_use(x, ux) (1 + 2 * (sizeof(ux) < 4))
-#define __sign_use(x, ux) (is_signed_type(typeof(ux)) ? \
-	__signed_type_use(x, ux) : __unsigned_type_use(x, ux))
+#define __signed_type_use(ux) (2 + __is_nonneg(ux))
+#define __unsigned_type_use(ux) (1 + 2 * (sizeof(ux) < 4))
+#define __sign_use(ux) (is_signed_type(typeof(ux)) ? \
+	__signed_type_use(ux) : __unsigned_type_use(ux))
 
 /*
  * Check whether a signed value is always non-negative.
@@ -71,13 +71,13 @@
 #else
   #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL, 1L))
 #endif
-#define __is_nonneg(x, ux) statically_true((__signed_type(ux))(x) >= 0)
+#define __is_nonneg(ux) statically_true((__signed_type(ux))(ux) >= 0)
 
-#define __types_ok(x, y, ux, uy) \
-	(__sign_use(x, ux) & __sign_use(y, uy))
+#define __types_ok(ux, uy) \
+	(__sign_use(ux) & __sign_use(uy))
 
-#define __types_ok3(x, y, z, ux, uy, uz) \
-	(__sign_use(x, ux) & __sign_use(y, uy) & __sign_use(z, uz))
+#define __types_ok3(ux, uy, uz) \
+	(__sign_use(ux) & __sign_use(uy) & __sign_use(uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -92,7 +92,7 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	BUILD_BUG_ON_MSG(!__types_ok(x, y, ux, uy),	\
+	BUILD_BUG_ON_MSG(!__types_ok(ux, uy),		\
 		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
@@ -109,7 +109,7 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	BUILD_BUG_ON_MSG(!__types_ok3(val, lo, hi, uval, ulo, uhi),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(uval, ulo, uhi),				\
 		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
@@ -149,7 +149,7 @@
 
 #define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
 	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
-	BUILD_BUG_ON_MSG(!__types_ok3(x, y, z, ux, uy, uz),		\
+	BUILD_BUG_ON_MSG(!__types_ok3(ux, uy, uz),			\
 		#op"3("#x", "#y", "#z") signedness error");		\
 	__cmp(op, ux, __cmp(op, uy, uz)); })
 
-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>
CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 02/11 6.1.y] minmax: don't use max() in situations that want a C constant expression
Date: Thu, 2 Oct 2025 18:00:20 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]

We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.

This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
V2 -> V3:
- Fix build failure in drivers/md/dm-integrity.c: In function
  ‘integrity_metadata’.
  The fix uses MAX() instead of max() in the checksums_onstack[] array
  declarations.
  Note: In the mainline branch, checksums_onstack[] used max_t(), so it
  was fixed to use MAX_T() in commit 4477b39c32fd ("minmax: add a few
  more MIN_T/MAX_T users").
  In 6.1.y, checksums_onstack[] used max(), so it was fixed to use MAX
  in the backport of commit cb04e8b1d2f2 ("minmax: don't use max() in
  situations that want a C constant expression").

 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c   | 2 +-
 drivers/input/touchscreen/cyttsp4_core.c | 2 +-
 drivers/irqchip/irq-sun6i-r.c            | 2 +-
 drivers/md/dm-integrity.c                | 2 +-
 fs/btrfs/tree-checker.c                  | 2 +-
 lib/vsprintf.c                           | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 768b6e7dbd77..fd1faa840ec0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -700,7 +700,7 @@ static const char *smu_get_feature_name(struct smu_context *smu,
 size_t smu_cmn_get_pp_feature_mask(struct smu_context *smu,
 				   char *buf)
 {
-	int8_t sort_feature[max(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
+	int8_t sort_feature[MAX(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
 	uint64_t feature_mask;
 	int i, feature_index;
 	uint32_t count = 0;
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
index dccbcb942fe5..936d69da3bda 100644
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
 	struct cyttsp4_touch tch;
 	int sig;
 	int i, j, t = 0;
-	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+	int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
 
 	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
 	for (i = 0; i < num_cur_tch; i++) {
diff --git a/drivers/irqchip/irq-sun6i-r.c b/drivers/irqchip/irq-sun6i-r.c
index a01e44049415..99958d470d62 100644
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -270,7 +270,7 @@ static const struct irq_domain_ops sun6i_r_intc_domain_ops = {
 
 static int sun6i_r_intc_suspend(void)
 {
-	u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+	u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
 	int i;
 
 	/* Wake IRQs are enabled during system sleep and shutdown. */
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index a201019babe4..fc9cb626ca91 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -1794,7 +1794,7 @@ static void integrity_metadata(struct work_struct *w)
 		struct bio *bio = dm_bio_from_per_bio_data(dio, sizeof(struct dm_integrity_io));
 		char *checksums;
 		unsigned int extra_space = unlikely(digest_size > ic->tag_size) ? digest_size - ic->tag_size : 0;
-		char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
+		char checksums_onstack[MAX(HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
 		sector_t sector;
 		unsigned int sectors_to_process;
 
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index d3e5429ee03d..6108cfab1ba5 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -608,7 +608,7 @@ static int check_dir_item(struct extent_buffer *leaf,
 		 */
 		if (key->type == BTRFS_DIR_ITEM_KEY ||
 		    key->type == BTRFS_XATTR_ITEM_KEY) {
-			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+			char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
 
 			read_extent_buffer(leaf, namebuf,
 					(unsigned long)(di + 1), name_len);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index fa1c19701855..2b0b5f08b8fc 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1082,7 +1082,7 @@ char *resource_string(char *buf, char *end, struct resource *res,
 #define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
 #define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
 #define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
-	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+	char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
 		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
 	char *p = sym, *pend = sym + sizeof(sym);
-- 
2.47.3

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Subject: [PATCH v3 03/11 6.1.y] minmax: improve macro expansion and type checking
Date: Thu, 2 Oct 2025 18:00:21 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 22f5468731491e53356ba7c028f0fdea20b18e2c ]

This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.

In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:

 - an expression with a signed type can be used for
    (1) signed comparisons
    (2) unsigned comparisons if it is statically known to have a
        non-negative value

 - an expression with an unsigned type can be used for
    (3) unsigned comparison
    (4) signed comparisons if the type is smaller than 'int' and thus
        the C integer promotion rules will make it signed anyway

Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.

Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel.  Notably with
bcachefs having an expression like

	min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)

where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.

Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.

However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.

But at least for now the rule is in place for backwards compatibility.

Also note that rule (2) existed before, but is hugely relaxed by this
commit.  It used to be true only for the simplest compile-time
non-negative integer constants.  The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.

For example, the amdgpu driver does

	min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));

because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.

Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.

Cc: Arnd Bergmann <[email-masked]>
Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/compiler.h |  9 +++++
 include/linux/minmax.h   | 74 ++++++++++++++++++++++++++++++++--------
 2 files changed, 68 insertions(+), 15 deletions(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index f6ea15821cea..a6a7be83fae6 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -244,6 +244,15 @@ static inline void *offset_to_ptr(const int *off)
  */
 #define is_signed_type(type) (((type)(-1)) < (__force type)1)
 
+/*
+ * Useful shorthand for "is this condition known at compile-time?"
+ *
+ * Note that the condition may involve non-constant values,
+ * but the compiler may know enough about the details of the
+ * values to determine that the condition is statically true.
+ */
+#define statically_true(x) (__builtin_constant_p(x) && (x))
+
 /*
  * This is needed in functions which generate the stack canary, see
  * arch/x86/kernel/smpboot.c::start_secondary() for an example.
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index e3e4353df983..41da6f85a407 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -26,19 +26,63 @@
 #define __typecheck(x, y) \
 	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
 
-/* is_signed_type() isn't a constexpr for pointer types */
-#define __is_signed(x) 								\
-	__builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))),	\
-		is_signed_type(typeof(x)), 0)
+/*
+ * __sign_use for integer expressions:
+ *   bit #0 set if ok for unsigned comparisons
+ *   bit #1 set if ok for signed comparisons
+ *
+ * In particular, statically non-negative signed integer
+ * expressions are ok for both.
+ *
+ * NOTE! Unsigned types smaller than 'int' are implicitly
+ * converted to 'int' in expressions, and are accepted for
+ * signed conversions for now. This is debatable.
+ *
+ * Note that 'x' is the original expression, and 'ux' is
+ * the unique variable that contains the value.
+ *
+ * We use 'ux' for pure type checking, and 'x' for when
+ * we need to look at the value (but without evaluating
+ * it for side effects! Careful to only ever evaluate it
+ * with sizeof() or __builtin_constant_p() etc).
+ *
+ * Pointers end up being checked by the normal C type
+ * rules at the actual comparison, and these expressions
+ * only need to be careful to not cause warnings for
+ * pointer use.
+ */
+#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
+#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
+#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
+	__signed_type_use(x,ux):__unsigned_type_use(x,ux))
+
+/*
+ * To avoid warnings about casting pointers to integers
+ * of different sizes, we need that special sign type.
+ *
+ * On 64-bit we can just always use 'long', since any
+ * integer or pointer type can just be cast to that.
+ *
+ * This does not work for 128-bit signed integers since
+ * the cast would truncate them, but we do not use s128
+ * types in the kernel (we do use 'u128', but they will
+ * be handled by the !is_signed_type() case).
+ *
+ * NOTE! The cast is there only to avoid any warnings
+ * from when values that aren't signed integer types.
+ */
+#ifdef CONFIG_64BIT
+  #define __signed_type(ux) long
+#else
+  #define __signed_type(ux) typeof(__builtin_choose_expr(sizeof(ux)>4,1LL,1L))
+#endif
+#define __is_nonneg(x,ux) statically_true((__signed_type(ux))(x)>=0)
 
-/* True for a non-negative signed int constant */
-#define __is_noneg_int(x)	\
-	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
+#define __types_ok(x,y,ux,uy) \
+	(__sign_use(x,ux) & __sign_use(y,uy))
 
-#define __types_ok(x, y, ux, uy) 				\
-	(__is_signed(ux) == __is_signed(uy) ||			\
-	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
-	 __is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok3(x,y,z,ux,uy,uz) \
+	(__sign_use(x,ux) & __sign_use(y,uy) & __sign_use(z,uz))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -53,8 +97,8 @@
 
 #define __careful_cmp_once(op, x, y, ux, uy) ({		\
 	__auto_type ux = (x); __auto_type uy = (y);	\
-	static_assert(__types_ok(x, y, ux, uy),		\
-		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
+	BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy),	\
+		#op"("#x", "#y") signedness error");	\
 	__cmp(op, ux, uy); })
 
 #define __careful_cmp(op, x, y) \
@@ -70,8 +114,8 @@
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	BUILD_BUG_ON_MSG(!__types_ok3(val,lo,hi,uval,ulo,uhi),			\
+		"clamp("#val", "#lo", "#hi") signedness error");		\
 	__clamp(uval, ulo, uhi); })
 
 #define __careful_clamp(val, lo, hi) \
-- 
2.47.3

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Subject: [PATCH v3 04/11 6.1.y] minmax: fix up min3() and max3() too
Date: Thu, 2 Oct 2025 18:00:22 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit 21b136cc63d2a9ddd60d4699552b69c214b32964 ]

David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.

And our current macros are actually rather broken.

In particular, the macros did this:

  #define min3(x, y, z) min((typeof(x))min(x, y), z)
  #define max3(x, y, z) max((typeof(x))max(x, y), z)

and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.

For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'.  The types are
compatible, and there's no warning - but the result is just random
garbage.

No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.

Requested-by: David Laight <[email-masked]>
Acked-by: Arnd Bergmann <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 41da6f85a407..98008dd92153 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -152,13 +152,20 @@
 #define umax(x, y)	\
 	__careful_cmp(max, (x) + 0u + 0ul + 0ull, (y) + 0u + 0ul + 0ull)
 
+#define __careful_op3(op, x, y, z, ux, uy, uz) ({			\
+	__auto_type ux = (x); __auto_type uy = (y);__auto_type uz = (z);\
+	BUILD_BUG_ON_MSG(!__types_ok3(x,y,z,ux,uy,uz),			\
+		#op"3("#x", "#y", "#z") signedness error");		\
+	__cmp(op, ux, __cmp(op, uy, uz)); })
+
 /**
  * min3 - return minimum of three values
  * @x: first value
  * @y: second value
  * @z: third value
  */
-#define min3(x, y, z) min((typeof(x))min(x, y), z)
+#define min3(x, y, z) \
+	__careful_op3(min, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * max3 - return maximum of three values
@@ -166,7 +173,8 @@
  * @y: second value
  * @z: third value
  */
-#define max3(x, y, z) max((typeof(x))max(x, y), z)
+#define max3(x, y, z) \
+	__careful_op3(max, x, y, z, __UNIQUE_ID(x_), __UNIQUE_ID(y_), __UNIQUE_ID(z_))
 
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
-- 
2.47.3

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Cc: [email-masked], [email-masked],
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On Wed, Oct 01, 2025 at 11:02:03PM +0200, Ard Biesheuvel wrote:

> However, dropping that flag allows the compiler to use FPU and SIMD
> registers in other ways too, and for this reason, arm64 only permits
> doing so in strictly controlled contexts, i.e., isolated compilation
> units that get called from inside a kernel_neon_begin() and
> kernel_neon_end() pair.

> The users of the generic kernel mode FPU API lack such strict checks,
> and this may result in userland FP/SIMD state to get corrupted, given
> that touching FP/SIMD registers outside of a kernel_neon_begin/end pair
> does not fault, but silently operates on the userland state without
> preserving it.

Oh dear, that's nasty - I didn't see the patch when it was going in:

Reviewed-by: Mark Brown <[email-masked]>

--nWWZ4oGleevaWtf9
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--nWWZ4oGleevaWtf9--

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Date: Thu, 2 Oct 2025 10:37:23 -0700
From: Eric Biggers <[email-masked]>
To: Breno Leitao <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	Herbert Xu <[email-masked]>,
	"David S. Miller" <[email-masked]>,
	Ard Biesheuvel <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	Michael van der Westhuizen <[email-masked]>,
	Tobias Fleig <[email-masked]>
Subject: Re: [PATCH v2] stable: crypto: sha256 - fix crash at kexec
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On Thu, Oct 02, 2025 at 04:26:20AM -0700, Breno Leitao wrote:
> Loading a large (~2.1G) files with kexec crashes the host with when
> running:
> 
>   # kexec --load kernel --initrd initrd_with_2G_or_more
> 
>   UBSAN: signed-integer-overflow in ./include/crypto/sha256_base.h:64:19
>   34152083 * 64 cannot be represented in type 'int'
>   ...
>   BUG: unable to handle page fault for address: ff9fffff83b624c0
>   sha256_update (lib/crypto/sha256.c:137)
>   crypto_sha256_update (crypto/sha256_generic.c:40)
>   kexec_calculate_store_digests (kernel/kexec_file.c:769)
>   __se_sys_kexec_file_load (kernel/kexec_file.c:397 kernel/kexec_file.c:332)
>   ...
> 
> (Line numbers based on commit da274362a7bd9 ("Linux 6.12.49")
> 
> This started happening after commit f4da7afe07523f
> ("kexec_file: increase maximum file size to 4G") that landed in v6.0,
> which increased the file size for kexec.
> 
> This is not happening upstream (v6.16+), given that `block` type was
> upgraded from "int" to "size_t" in commit 74a43a2cf5e8 ("crypto:
> lib/sha256 - Move partial block handling out")
> 
> Upgrade the block type similar to the commit above, avoiding hitting the
> overflow.
> 
> This patch is only suitable for the stable tree, and before 6.16, which
> got commit 74a43a2cf5e8 ("crypto: lib/sha256 - Move partial block
> handling out"). This is not required before f4da7afe07523f ("kexec_file:
> increase maximum file size to 4G"). In other words, this fix is required
> between versions v6.0 and v6.16.
> 
> Signed-off-by: Breno Leitao <[email-masked]>
> Fixes: f4da7afe07523f ("kexec_file: increase maximum file size to 4G") # Before v6.16
> Reported-by: Michael van der Westhuizen <[email-masked]>
> Reported-by: Tobias Fleig <[email-masked]>
> ---
> Changes in v2:
> - s/size_t/unsigned int/ as suggested by Eric
> - Tag the commit that introduce the problem as Fixes, making backport easier.
> - Link to v1: https://lore.kernel.org/r/[email-masked]
> ---
>  include/crypto/sha256_base.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
> index e0418818d63c8..e3e610cfe8d30 100644
> --- a/include/crypto/sha256_base.h
> +++ b/include/crypto/sha256_base.h
> @@ -44,7 +44,7 @@ static inline int lib_sha256_base_do_update(struct sha256_state *sctx,
>  	sctx->count += len;
>  
>  	if (unlikely((partial + len) >= SHA256_BLOCK_SIZE)) {
> -		int blocks;
> +		unsigned int blocks;
>  
>  		if (partial) {
>  			int p = SHA256_BLOCK_SIZE - partial;
> 
> ---
> base-commit: da274362a7bd9ab3a6e46d15945029145ebce672
> change-id: 20251001-stable_crash-f2151baf043b

Reviewed-by: Eric Biggers <[email-masked]>

- Eric

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>, <[email-masked]>,
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	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>
Subject: [PATCH v3 00/11 6.1.y] Backport minmax.h updates from v6.17-rc7
Date: Thu, 2 Oct 2025 18:00:18 +0000
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This series backports 13 patches to update minmax.h in the 6.1.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes (6.12.y and 6.6.y were already
backported by me and are now ligned).

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in older kernels.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

Changes in v3:
- v2 included 13 patches:
  https://lore.kernel.org/stable/[email-masked]/
- First 2 were accepted and are part of 6.1.155.
- 3rd caused build in drivers/md/ to fail:

In file included from ./include/linux/container_of.h:5,
                 from ./include/linux/list.h:5,
                 from ./include/linux/wait.h:7,
                 from ./include/linux/mempool.h:8,
                 from ./include/linux/bio.h:8,
                 from drivers/md/dm-bio-record.h:10,
                 from drivers/md/dm-integrity.c:9:
drivers/md/dm-integrity.c: In function ‘integrity_metadata’:
drivers/md/dm-integrity.c:131:105: error: ISO C90 forbids variable length array ‘checksums_onstack’ [-Werror=vla]
  131 | #define MAX_TAG_SIZE                    (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
      |                                                                                                         ^~~~~~~~~~~~~
./include/linux/build_bug.h:78:56: note: in definition of macro ‘__static_assert’
   78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
      |                                                        ^~~~
./include/linux/minmax.h:56:9: note: in expansion of macro ‘static_assert’
   56 |         static_assert(__types_ok(x, y, ux, uy),         \
      |         ^~~~~~~~~~~~~
./include/linux/minmax.h:41:31: note: in expansion of macro ‘__is_noneg_int’
   41 |          __is_noneg_int(x) || __is_noneg_int(y))
      |                               ^~~~~~~~~~~~~~
./include/linux/minmax.h:56:23: note: in expansion of macro ‘__types_ok’
   56 |         static_assert(__types_ok(x, y, ux, uy),         \
      |                       ^~~~~~~~~~
./include/linux/minmax.h:61:9: note: in expansion of macro ‘__careful_cmp_once’
   61 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
      |         ^~~~~~~~~~~~~~~~~~
./include/linux/minmax.h:92:25: note: in expansion of macro ‘__careful_cmp’
   92 | #define max(x, y)       __careful_cmp(max, x, y)
      |                         ^~~~~~~~~~~~~
drivers/md/dm-integrity.c:1797:40: note: in expansion of macro ‘max’
 1797 |                 char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
      |                                        ^~~
drivers/md/dm-integrity.c:131:89: note: in expansion of macro ‘offsetof’
  131 | #define MAX_TAG_SIZE                    (JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR - offsetof(struct journal_entry, last_bytes[MAX_SECTORS_PER_BLOCK]))
      |                                                                                         ^~~~~~~~
drivers/md/dm-integrity.c:1797:73: note: in expansion of macro ‘MAX_TAG_SIZE’
 1797 |                 char checksums_onstack[max((size_t)HASH_MAX_DIGESTSIZE, MAX_TAG_SIZE)];
      |                                                                         ^~~~~~~~~~~~

- The build was fixed in the second patch of this series.

Changes in v2:
- v1 included 19 patches:
  https://lore.kernel.org/stable/[email-masked]/
- First 6 were pushed to the stable-tree.
- 7th cauded amd driver's build to fail.
- This change fixes it.
- Modified files:
   drivers/gpu/drm/amd/amdgpu/amdgpu.h
   drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

David Laight (7):
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

Linus Torvalds (4):
  minmax: simplify min()/max()/clamp() implementation
  minmax: don't use max() in situations that want a C constant
    expression
  minmax: improve macro expansion and type checking
  minmax: fix up min3() and max3() too

 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c   |   2 +-
 drivers/input/touchscreen/cyttsp4_core.c |   2 +-
 drivers/irqchip/irq-sun6i-r.c            |   2 +-
 drivers/md/dm-integrity.c                |   2 +-
 fs/btrfs/tree-checker.c                  |   2 +-
 include/linux/compiler.h                 |   9 +
 include/linux/minmax.h                   | 222 +++++++++++++----------
 lib/vsprintf.c                           |   2 +-
 8 files changed, 143 insertions(+), 100 deletions(-)

-- 
2.47.3

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From: Eliav Farber <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>,
	<[email-masked]>, <[email-masked]>
CC: Linus Torvalds <[email-masked]>, David Laight
	<[email-masked]>, Lorenzo Stoakes <[email-masked]>
Subject: [PATCH v3 01/11 6.1.y] minmax: simplify min()/max()/clamp() implementation
Date: Thu, 2 Oct 2025 18:00:19 +0000
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From: Linus Torvalds <[email-masked]>

[ Upstream commit dc1c8034e31b14a2e5e212104ec508aec44ce1b9 ]

Now that we no longer have any C constant expression contexts (ie array
size declarations or static initializers) that use min() or max(), we
can simpify the implementation by not having to worry about the result
staying as a C constant expression.

So now we can unconditionally just use temporary variables of the right
type, and get rid of the excessive expansion that used to come from the
use of

   __builtin_choose_expr(__is_constexpr(...), ..

to pick the specialized code for constant expressions.

Another expansion simplification is to pass the temporary variables (in
addition to the original expression) to our __types_ok() macro.  That
may superficially look like it complicates the macro, but when we only
want the type of the expression, expanding the temporary variable names
is much simpler and smaller than expanding the potentially complicated
original expression.

As a result, on my machine, doing a

  $ time make drivers/staging/media/atomisp/pci/isp/kernels/ynr/ynr_1.0/ia_css_ynr.host.i

goes from

	real	0m16.621s
	user	0m15.360s
	sys	0m1.221s

to

	real	0m2.532s
	user	0m2.091s
	sys	0m0.452s

because the token expansion goes down dramatically.

In particular, the longest line expansion (which was line 71 of that
'ia_css_ynr.host.c' file) shrinks from 23,338kB (yes, 23MB for one
single line) to "just" 1,444kB (now "only" 1.4MB).

And yes, that line is still the line from hell, because it's doing
multiple levels of "min()/max()" expansion thanks to some of them being
hidden inside the uDIGIT_FITTING() macro.

Lorenzo has a nice cleanup patch that makes that driver use inline
functions instead of macros for sDIGIT_FITTING() and uDIGIT_FITTING(),
which will fix that line once and for all, but the 16-fold reduction in
this case does show why we need to simplify these helpers.

Cc: David Laight <[email-masked]>
Cc: Lorenzo Stoakes <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Eliav Farber <[email-masked]>
---
 include/linux/minmax.h | 43 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index fc384714da45..e3e4353df983 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -35,10 +35,10 @@
 #define __is_noneg_int(x)	\
 	(__builtin_choose_expr(__is_constexpr(x) && __is_signed(x), x, -1) >= 0)
 
-#define __types_ok(x, y) 					\
-	(__is_signed(x) == __is_signed(y) ||			\
-		__is_signed((x) + 0) == __is_signed((y) + 0) ||	\
-		__is_noneg_int(x) || __is_noneg_int(y))
+#define __types_ok(x, y, ux, uy) 				\
+	(__is_signed(ux) == __is_signed(uy) ||			\
+	 __is_signed((ux) + 0) == __is_signed((uy) + 0) ||	\
+	 __is_noneg_int(x) || __is_noneg_int(y))
 
 #define __cmp_op_min <
 #define __cmp_op_max >
@@ -51,34 +51,31 @@
 #define __cmp_once(op, type, x, y) \
 	__cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
-#define __careful_cmp_once(op, x, y) ({			\
-	static_assert(__types_ok(x, y),			\
+#define __careful_cmp_once(op, x, y, ux, uy) ({		\
+	__auto_type ux = (x); __auto_type uy = (y);	\
+	static_assert(__types_ok(x, y, ux, uy),		\
 		#op "(" #x ", " #y ") signedness error, fix types or consider u" #op "() before " #op "_t()"); \
-	__cmp_once(op, __auto_type, x, y); })
+	__cmp(op, ux, uy); })
 
-#define __careful_cmp(op, x, y)					\
-	__builtin_choose_expr(__is_constexpr((x) - (y)),	\
-		__cmp(op, x, y), __careful_cmp_once(op, x, y))
+#define __careful_cmp(op, x, y) \
+	__careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
 
 #define __clamp(val, lo, hi)	\
 	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
 
-#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({		\
-	typeof(val) unique_val = (val);						\
-	typeof(lo) unique_lo = (lo);						\
-	typeof(hi) unique_hi = (hi);						\
+#define __clamp_once(val, lo, hi, uval, ulo, uhi) ({				\
+	__auto_type uval = (val);						\
+	__auto_type ulo = (lo);							\
+	__auto_type uhi = (hi);							\
 	static_assert(__builtin_choose_expr(__is_constexpr((lo) > (hi)), 	\
 			(lo) <= (hi), true),					\
 		"clamp() low limit " #lo " greater than high limit " #hi);	\
-	static_assert(__types_ok(val, lo), "clamp() 'lo' signedness error");	\
-	static_assert(__types_ok(val, hi), "clamp() 'hi' signedness error");	\
-	__clamp(unique_val, unique_lo, unique_hi); })
-
-#define __careful_clamp(val, lo, hi) ({					\
-	__builtin_choose_expr(__is_constexpr((val) - (lo) + (hi)),	\
-		__clamp(val, lo, hi),					\
-		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
-			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+	static_assert(__types_ok(uval, lo, uval, ulo), "clamp() 'lo' signedness error");	\
+	static_assert(__types_ok(uval, hi, uval, uhi), "clamp() 'hi' signedness error");	\
+	__clamp(uval, ulo, uhi); })
+
+#define __careful_clamp(val, lo, hi) \
+	__clamp_once(val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_))
 
 /**
  * min - return minimum of two values of the same or compatible types
-- 
2.47.3

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Date: Thu, 2 Oct 2025 11:09:35 -0500
From: Lucas De Marchi <[email-masked]>
To: <[email-masked]>, <[email-masked]>,
	<[email-masked]>, Bjorn Helgaas <[email-masked]>
CC: Ilpo =?utf-8?B?SsOkcnZpbmVu?= <[email-masked]>, "Icenowy
 Zheng" <[email-masked]>, Vivian Wang <[email-masked]>, Thomas
 =?utf-8?Q?Hellstr=C3=B6m?= <[email-masked]>, Rodrigo Vivi
	<[email-masked]>, Simon Richter <[email-masked]>,
	<[email-masked]>, <[email-masked]>
Subject: Re: [PATCH 1/2] PCI: Release BAR0 of an integrated bridge to allow
 GPU BAR resize
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On Thu, Sep 18, 2025 at 01:58:56PM -0700, Lucas De Marchi wrote:
>From: Ilpo J�rvinen <[email-masked]>
>
>Resizing BAR to a larger size has to release upstream bridge windows in
>order make the bridge windows larger as well (and to potential relocate
>them into a larger free block within iomem space). Some GPUs have an
>integrated PCI switch that has BAR0. The resource allocation assigns
>space for that BAR0 as it does for any resource.
>
>An extra resource on a bridge will pin its upstream bridge window in
>place which prevents BAR resize for anything beneath that bridge.
>
>Nothing in the pcieport driver provided by PCI core, which typically is
>the driver bound to these bridges, requires that BAR0. Because of that,
>releasing the extra BAR does not seem to have notable downsides but
>comes with a clear upside.
>
>Therefore, release BAR0 of such switches using a quirk and clear its
>flags to prevent any new invocation of the resource assignment
>algorithm from assigning the resource again.
>
>Due to other siblings within the PCI hierarchy of all the devices
>integrated into the GPU, some other devices may still have to be
>manually removed before the resize is free of any bridge window pins.
>Such siblings can be released through sysfs to unpin windows while
>leaving access to GPU's sysfs entries required for initiating the
>resize operation, whereas removing the topmost bridge this quirk
>targets would result in removing the GPU device as well so no manual
>workaround for this problem exists.
>
>Reported-by: Lucas De Marchi <[email-masked]>
>Link: https://lore.kernel.org/linux-pci/fl6tx5ztvttg7txmz2ps7oyd745wg3lwcp3h7esmvnyg26n44y@owo2ojiu2mov/
>Link: https://lore.kernel.org/intel-xe/[email-masked]/
>Signed-off-by: Ilpo J�rvinen <[email-masked]>
>Cc: <[email-masked]> # v6.12+
>Signed-off-by: Lucas De Marchi <[email-masked]>
>---
>
>Remarks from Ilpo: this feels quite hacky to me and I'm working towards a
>better solution which is to consider Resizable BAR maximum size the
>resource fitting algorithm. But then, I don't expect the better solution
>to be something we want to push into stable due to extremely invasive
>dependencies. So maybe consider this an interim/legacy solution to the
>resizing problem and remove it once the algorithmic approach works (or
>more precisely retain it only in the old kernel versions).

Bjorn, would that be acceptable? If so, please let me know if I can take
it through the drm tree together with the second patch to have this BAR
resize fixed for BMG.

thanks
Lucas De Marchi

>---
> drivers/pci/quirks.c | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
>
>diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
>index d97335a401930..9b1c08de3aa89 100644
>--- a/drivers/pci/quirks.c
>+++ b/drivers/pci/quirks.c
>@@ -6338,3 +6338,26 @@ static void pci_mask_replay_timer_timeout(struct pci_dev *pdev)
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_GLI, 0x9750, pci_mask_replay_timer_timeout);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_GLI, 0x9755, pci_mask_replay_timer_timeout);
> #endif
>+
>+/*
>+ * PCI switches integrated into Intel Arc GPUs have BAR0 that prevents
>+ * resizing the BARs of the GPU device due to that bridge BAR0 pinning the
>+ * bridge window it's under in place. Nothing in pcieport requires that
>+ * BAR0.
>+ *
>+ * Release and disable BAR0 permanently by clearing its flags to prevent
>+ * anything from assigning it again.
>+ */
>+static void pci_release_bar0(struct pci_dev *pdev)
>+{
>+	struct resource *res = pci_resource_n(pdev, 0);
>+
>+	if (!res->parent)
>+		return;
>+
>+	pci_release_resource(pdev, 0);
>+	res->flags = 0;
>+}
>+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, 0x4fa0, pci_release_bar0);
>+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, 0x4fa1, pci_release_bar0);
>+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, 0xe2ff, pci_release_bar0);
>
>-- 
>2.50.1
>

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Date: Thu, 2 Oct 2025 12:10:40 -0400
From: "Liam R. Howlett" <[email-masked]>
To: Lance Yang <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
        [email-masked], [email-masked], [email-masked],
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Subject: Re: [PATCH v5 1/1] mm/rmap: fix soft-dirty and uffd-wp bit loss when
 remapping zero-filled mTHP subpage to shared zeropage
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* Lance Yang <[email-masked]> [250930 04:13]:
> From: Lance Yang <[email-masked]>
> 
> When splitting an mTHP and replacing a zero-filled subpage with the shared
> zeropage, try_to_map_unused_to_zeropage() currently drops several important
> PTE bits.
> 
> For userspace tools like CRIU, which rely on the soft-dirty mechanism for
> incremental snapshots, losing the soft-dirty bit means modified pages are
> missed, leading to inconsistent memory state after restore.
> 
> As pointed out by David, the more critical uffd-wp bit is also dropped.
> This breaks the userfaultfd write-protection mechanism, causing writes
> to be silently missed by monitoring applications, which can lead to data
> corruption.
> 
> Preserve both the soft-dirty and uffd-wp bits from the old PTE when
> creating the new zeropage mapping to ensure they are correctly tracked.
> 
> Cc: <[email-masked]>
> Fixes: b1f202060afe ("mm: remap unused subpages to shared zeropage when splitting isolated thp")
> Suggested-by: David Hildenbrand <[email-masked]>
> Suggested-by: Dev Jain <[email-masked]>
> Acked-by: David Hildenbrand <[email-masked]>
> Reviewed-by: Dev Jain <[email-masked]>
> Signed-off-by: Lance Yang <[email-masked]>

Reviewed-by: Liam R. Howlett <[email-masked]>

> ---
> v4 -> v5:
>  - Move ptep_get() call after the !pvmw.pte check, which handles PMD-mapped
>    THP migration entries.
>  - https://lore.kernel.org/linux-mm/[email-masked]/
>  
> v3 -> v4:
>  - Minor formatting tweak in try_to_map_unused_to_zeropage() function
>    signature (per David and Dev)
>  - Collect Reviewed-by from Dev - thanks!
>  - https://lore.kernel.org/linux-mm/[email-masked]/
> 
> v2 -> v3:
>  - ptep_get() gets called only once per iteration (per Dev)
>  - https://lore.kernel.org/linux-mm/[email-masked]/
> 
> v1 -> v2:
>  - Avoid calling ptep_get() multiple times (per Dev)
>  - Double-check the uffd-wp bit (per David)
>  - Collect Acked-by from David - thanks!
>  - https://lore.kernel.org/linux-mm/[email-masked]/
> 
>  mm/migrate.c | 15 ++++++++++-----
>  1 file changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/mm/migrate.c b/mm/migrate.c
> index ce83c2c3c287..e3065c9edb55 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -296,8 +296,7 @@ bool isolate_folio_to_list(struct folio *folio, struct list_head *list)
>  }
>  
>  static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
> -					  struct folio *folio,
> -					  unsigned long idx)
> +		struct folio *folio, pte_t old_pte, unsigned long idx)
>  {
>  	struct page *page = folio_page(folio, idx);
>  	pte_t newpte;
> @@ -306,7 +305,7 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>  		return false;
>  	VM_BUG_ON_PAGE(!PageAnon(page), page);
>  	VM_BUG_ON_PAGE(!PageLocked(page), page);
> -	VM_BUG_ON_PAGE(pte_present(ptep_get(pvmw->pte)), page);
> +	VM_BUG_ON_PAGE(pte_present(old_pte), page);
>  
>  	if (folio_test_mlocked(folio) || (pvmw->vma->vm_flags & VM_LOCKED) ||
>  	    mm_forbids_zeropage(pvmw->vma->vm_mm))
> @@ -322,6 +321,12 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw,
>  
>  	newpte = pte_mkspecial(pfn_pte(my_zero_pfn(pvmw->address),
>  					pvmw->vma->vm_page_prot));
> +
> +	if (pte_swp_soft_dirty(old_pte))
> +		newpte = pte_mksoft_dirty(newpte);
> +	if (pte_swp_uffd_wp(old_pte))
> +		newpte = pte_mkuffd_wp(newpte);
> +
>  	set_pte_at(pvmw->vma->vm_mm, pvmw->address, pvmw->pte, newpte);
>  
>  	dec_mm_counter(pvmw->vma->vm_mm, mm_counter(folio));
> @@ -364,13 +369,13 @@ static bool remove_migration_pte(struct folio *folio,
>  			continue;
>  		}
>  #endif
> +		old_pte = ptep_get(pvmw.pte);
>  		if (rmap_walk_arg->map_unused_to_zeropage &&
> -		    try_to_map_unused_to_zeropage(&pvmw, folio, idx))
> +		    try_to_map_unused_to_zeropage(&pvmw, folio, old_pte, idx))
>  			continue;
>  
>  		folio_get(folio);
>  		pte = mk_pte(new, READ_ONCE(vma->vm_page_prot));
> -		old_pte = ptep_get(pvmw.pte);
>  
>  		entry = pte_to_swp_entry(old_pte);
>  		if (!is_migration_entry_young(entry))
> -- 
> 2.49.0
> 
> 

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From: Hugo Villeneuve <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	[email-masked],
	Hugo Villeneuve <[email-masked]>,
	[email-masked]
Date: Thu,  2 Oct 2025 10:57:24 -0400
Subject: [PATCH v2 01/15] serial: sc16is7xx: remove useless enable of enhanced features
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From: Hugo Villeneuve <[email-masked]>

Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once
probed") permanently enabled access to the enhanced features in
sc16is7xx_probe(), and it is never disabled after that.

Therefore, remove useless re-enable of enhanced features in
sc16is7xx_set_baud().

Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed")
Cc: [email-masked]
Signed-off-by: Hugo Villeneuve <[email-masked]>
---
 drivers/tty/serial/sc16is7xx.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 1a2c4c14f6aac..c7435595dce13 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud)
 		div /= prescaler;
 	}
 
-	/* Enable enhanced features */
-	sc16is7xx_efr_lock(port);
-	sc16is7xx_port_update(port, SC16IS7XX_EFR_REG,
-			      SC16IS7XX_EFR_ENABLE_BIT,
-			      SC16IS7XX_EFR_ENABLE_BIT);
-	sc16is7xx_efr_unlock(port);
-
 	/* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */
 	sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
 			      SC16IS7XX_MCR_CLKSEL_BIT,
-- 
2.39.5

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From: Breno Leitao <[email-masked]>
Subject: [PATCH net v6 0/4] net: netpoll: fix memory leak and add
 comprehensive selftests
Date: Thu, 02 Oct 2025 08:26:24 -0700
To: Andrew Lunn <[email-masked]>, 
 "David S. Miller" <[email-masked]>, Eric Dumazet <[email-masked]>, 
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Fix a memory leak in netpoll and introduce netconsole selftests that
expose the issue when running with kmemleak detection enabled.

This patchset includes a selftest for netpoll with multiple concurrent
users (netconsole + bonding), which simulates the scenario from test[1]
that originally demonstrated the issue allegedly fixed by commit
efa95b01da18 ("netpoll: fix use after free") - a commit that is now
being reverted.

Sending this to "net" branch because this is a fix, and the selftest
might help with the backports validation.

Link: https://lore.kernel.org/lkml/[email-masked]/ [1]

Signed-off-by: Breno Leitao <[email-masked]>
---
Changes in v6:
- Expand the tests even more and some small fixups
- Moved the test to bonding selftests
- Link to v5: https://lore.kernel.org/r/[email-masked]

Changes in v5:
- Set CONFIG_BONDING=m in selftests/drivers/net/config.
- Link to v4: https://lore.kernel.org/r/[email-masked]

Changes in v4:
- Added an additional selftest to test multiple netpoll users in
  parallel
- Link to v3: https://lore.kernel.org/r/[email-masked]

Changes in v3:
- This patchset is a merge of the fix and the selftest together as
  recommended by Jakub.

Changes in v2:
- Reuse the netconsole creation from lib_netcons.sh. Thus, refactoring
  the create_dynamic_target() (Jakub)
- Move the "wait" to after all the messages has been sent.
- Link to v1: https://lore.kernel.org/r/[email-masked]

---
Breno Leitao (4):
      net: netpoll: fix incorrect refcount handling causing incorrect cleanup
      selftest: netcons: refactor target creation
      selftest: netcons: create a torture test
      selftest: netcons: add test for netconsole over bonded interfaces

 net/core/netpoll.c                                                  |   7 +++++--
 tools/testing/selftests/drivers/net/Makefile                        |   1 +
 tools/testing/selftests/drivers/net/bonding/Makefile                |   2 ++
 tools/testing/selftests/drivers/net/bonding/config                  |   4 ++++
 tools/testing/selftests/drivers/net/bonding/netcons_over_bonding.sh | 221 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh           | 189 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------
 tools/testing/selftests/drivers/net/netcons_torture.sh              | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 531 insertions(+), 20 deletions(-)
---
base-commit: f1455695d2d99894b65db233877acac9a0e120b9
change-id: 20250902-netconsole_torture-8fc23f0aca99

Best regards,
--  
Breno Leitao <[email-masked]>

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From: Breno Leitao <[email-masked]>
Date: Thu, 02 Oct 2025 08:26:25 -0700
Subject: [PATCH net v6 1/4] net: netpoll: fix incorrect refcount handling
 causing incorrect cleanup
To: Andrew Lunn <[email-masked]>, 
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commit efa95b01da18 ("netpoll: fix use after free") incorrectly
ignored the refcount and prematurely set dev->npinfo to NULL during
netpoll cleanup, leading to improper behavior and memory leaks.

Scenario causing lack of proper cleanup:

1) A netpoll is associated with a NIC (e.g., eth0) and netdev->npinfo is
   allocated, and refcnt = 1
   - Keep in mind that npinfo is shared among all netpoll instances. In
     this case, there is just one.

2) Another netpoll is also associated with the same NIC and
   npinfo->refcnt += 1.
   - Now dev->npinfo->refcnt = 2;
   - There is just one npinfo associated to the netdev.

3) When the first netpolls goes to clean up:
   - The first cleanup succeeds and clears np->dev->npinfo, ignoring
     refcnt.
     - It basically calls `RCU_INIT_POINTER(np->dev->npinfo, NULL);`
   - Set dev->npinfo = NULL, without proper cleanup
   - No ->ndo_netpoll_cleanup() is either called

4) Now the second target tries to clean up
   - The second cleanup fails because np->dev->npinfo is already NULL.
     * In this case, ops->ndo_netpoll_cleanup() was never called, and
       the skb pool is not cleaned as well (for the second netpoll
       instance)
  - This leaks npinfo and skbpool skbs, which is clearly reported by
    kmemleak.

Revert commit efa95b01da18 ("netpoll: fix use after free") and adds
clarifying comments emphasizing that npinfo cleanup should only happen
once the refcount reaches zero, ensuring stable and correct netpoll
behavior.

Cc: <[email-masked]> # 3.17.x
Cc: Jay Vosburgh <[email-masked]>
Fixes: efa95b01da18 ("netpoll: fix use after free")
Signed-off-by: Breno Leitao <[email-masked]>
Reviewed-by: Simon Horman <[email-masked]>
---
 net/core/netpoll.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 60a05d3b7c249..f4a0023428265 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -814,6 +814,10 @@ static void __netpoll_cleanup(struct netpoll *np)
 	if (!npinfo)
 		return;
 
+	/* At this point, there is a single npinfo instance per netdevice, and
+	 * its refcnt tracks how many netpoll structures are linked to it. We
+	 * only perform npinfo cleanup when the refcnt decrements to zero.
+	 */
 	if (refcount_dec_and_test(&npinfo->refcnt)) {
 		const struct net_device_ops *ops;
 
@@ -823,8 +827,7 @@ static void __netpoll_cleanup(struct netpoll *np)
 
 		RCU_INIT_POINTER(np->dev->npinfo, NULL);
 		call_rcu(&npinfo->rcu, rcu_cleanup_netpoll_info);
-	} else
-		RCU_INIT_POINTER(np->dev->npinfo, NULL);
+	}
 
 	skb_pool_flush(np);
 }

-- 
2.47.3

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Date: Thu, 2 Oct 2025 17:43:52 +0200
From: Greg KH <[email-masked]>
To: Hugo Villeneuve <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	[email-masked],
	Hugo Villeneuve <[email-masked]>, [email-masked]
Subject: Re: [PATCH v2 01/15] serial: sc16is7xx: remove useless enable of
 enhanced features
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On Thu, Oct 02, 2025 at 10:57:24AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <[email-masked]>
> 
> Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once
> probed") permanently enabled access to the enhanced features in
> sc16is7xx_probe(), and it is never disabled after that.
> 
> Therefore, remove useless re-enable of enhanced features in
> sc16is7xx_set_baud().
> 
> Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed")
> Cc: [email-masked]
> Signed-off-by: Hugo Villeneuve <[email-masked]>
> ---
>  drivers/tty/serial/sc16is7xx.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
> index 1a2c4c14f6aac..c7435595dce13 100644
> --- a/drivers/tty/serial/sc16is7xx.c
> +++ b/drivers/tty/serial/sc16is7xx.c
> @@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud)
>  		div /= prescaler;
>  	}
>  
> -	/* Enable enhanced features */
> -	sc16is7xx_efr_lock(port);
> -	sc16is7xx_port_update(port, SC16IS7XX_EFR_REG,
> -			      SC16IS7XX_EFR_ENABLE_BIT,
> -			      SC16IS7XX_EFR_ENABLE_BIT);
> -	sc16is7xx_efr_unlock(port);
> -
>  	/* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */
>  	sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
>  			      SC16IS7XX_MCR_CLKSEL_BIT,
> -- 
> 2.39.5
> 
> 

Why is this needed for stable kernels?  It's useless, what is it
harming?

If so, please send it separately, not as a part of a larger series.

thanks,

greg k-h

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Date: Thu, 2 Oct 2025 11:53:33 -0400
From: Hugo Villeneuve <[email-masked]>
To: Greg KH <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
 [email-masked], Hugo Villeneuve <[email-masked]>,
 [email-masked]
Subject: Re: [PATCH v2 01/15] serial: sc16is7xx: remove useless enable of
 enhanced features
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Hi Greg,

On Thu, 2 Oct 2025 17:43:52 +0200
Greg KH <[email-masked]> wrote:

> On Thu, Oct 02, 2025 at 10:57:24AM -0400, Hugo Villeneuve wrote:
> > From: Hugo Villeneuve <[email-masked]>
> > 
> > Commit 43c51bb573aa ("sc16is7xx: make sure device is in suspend once
> > probed") permanently enabled access to the enhanced features in
> > sc16is7xx_probe(), and it is never disabled after that.
> > 
> > Therefore, remove useless re-enable of enhanced features in
> > sc16is7xx_set_baud().
> > 
> > Fixes: 43c51bb573aa ("sc16is7xx: make sure device is in suspend once probed")
> > Cc: [email-masked]
> > Signed-off-by: Hugo Villeneuve <[email-masked]>
> > ---
> >  drivers/tty/serial/sc16is7xx.c | 7 -------
> >  1 file changed, 7 deletions(-)
> > 
> > diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
> > index 1a2c4c14f6aac..c7435595dce13 100644
> > --- a/drivers/tty/serial/sc16is7xx.c
> > +++ b/drivers/tty/serial/sc16is7xx.c
> > @@ -588,13 +588,6 @@ static int sc16is7xx_set_baud(struct uart_port *port, int baud)
> >  		div /= prescaler;
> >  	}
> >  
> > -	/* Enable enhanced features */
> > -	sc16is7xx_efr_lock(port);
> > -	sc16is7xx_port_update(port, SC16IS7XX_EFR_REG,
> > -			      SC16IS7XX_EFR_ENABLE_BIT,
> > -			      SC16IS7XX_EFR_ENABLE_BIT);
> > -	sc16is7xx_efr_unlock(port);
> > -
> >  	/* If bit MCR_CLKSEL is set, the divide by 4 prescaler is activated. */
> >  	sc16is7xx_port_update(port, SC16IS7XX_MCR_REG,
> >  			      SC16IS7XX_MCR_CLKSEL_BIT,
> > -- 
> > 2.39.5
> > 
> > 
> 
> Why is this needed for stable kernels?  It's useless, what is it
> harming?

It is useless, and doing no "harm", but since the device is on a SPI
or I2C bus, this is inefficient as it takes precious cycles on these
busses.

> If so, please send it separately, not as a part of a larger series.

That is why this patch is the first in the series, so that it could be
easily backported. But I can send it separately, sure.

Hugo.

From - Fri Oct 17 14:26:34 2025
Delivery-date: Thu, 02 Oct 2025 13:33:11 +0000
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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.16.10
Date: Thu,  2 Oct 2025 15:30:44 +0200
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I'm announcing the release of the 6.16.10 kernel.

All users of the 6.16 kernel series must upgrade.

The updated 6.16.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.16.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Documentation/admin-guide/laptops/lg-laptop.rst                         |    4 
 Makefile                                                                |    2 
 arch/arm/boot/dts/intel/socfpga/socfpga_cyclone5_sodia.dts              |    6 
 arch/arm/boot/dts/marvell/kirkwood-openrd-client.dts                    |    2 
 arch/arm64/boot/dts/freescale/imx8mp.dtsi                               |    4 
 arch/arm64/boot/dts/marvell/cn9130-cf.dtsi                              |    7 
 arch/arm64/boot/dts/marvell/cn9131-cf-solidwan.dts                      |    6 
 arch/arm64/boot/dts/marvell/cn9132-clearfog.dts                         |   22 
 arch/arm64/boot/dts/marvell/cn9132-sr-cex7.dtsi                         |    8 
 arch/arm64/boot/dts/rockchip/rk3588s-orangepi-5.dtsi                    |    3 
 arch/riscv/include/asm/pgtable.h                                        |   17 
 arch/x86/Kconfig                                                        |    2 
 arch/x86/include/asm/topology.h                                         |   10 
 arch/x86/kernel/cpu/topology.c                                          |   13 
 drivers/cpufreq/cpufreq.c                                               |   20 
 drivers/firewire/core-cdev.c                                            |    2 
 drivers/gpio/gpio-regmap.c                                              |    2 
 drivers/gpio/gpiolib-acpi-quirks.c                                      |   14 
 drivers/gpio/gpiolib.c                                                  |   21 
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c                        |   44 
 drivers/gpu/drm/amd/amdkfd/kfd_topology.c                               |    3 
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c                       |   12 
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h                       |    7 
 drivers/gpu/drm/amd/display/dc/dc.h                                     |    1 
 drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c                 |    6 
 drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c               |    6 
 drivers/gpu/drm/ast/ast_dp.c                                            |    2 
 drivers/gpu/drm/gma500/oaktrail_hdmi.c                                  |    2 
 drivers/gpu/drm/i915/display/intel_ddi.c                                |    5 
 drivers/gpu/drm/panfrost/panfrost_drv.c                                 |   61 -
 drivers/gpu/drm/panthor/panthor_sched.c                                 |    8 
 drivers/gpu/drm/xe/abi/guc_actions_abi.h                                |    5 
 drivers/gpu/drm/xe/abi/guc_klvs_abi.h                                   |   40 
 drivers/gpu/drm/xe/xe_bo_evict.c                                        |    4 
 drivers/gpu/drm/xe/xe_configfs.c                                        |    2 
 drivers/gpu/drm/xe/xe_device_sysfs.c                                    |    2 
 drivers/gpu/drm/xe/xe_gt.c                                              |    3 
 drivers/gpu/drm/xe/xe_guc.c                                             |   62 -
 drivers/gpu/drm/xe/xe_guc.h                                             |    1 
 drivers/gpu/drm/xe/xe_guc_submit.c                                      |   87 -
 drivers/gpu/drm/xe/xe_guc_submit.h                                      |    2 
 drivers/gpu/drm/xe/xe_uc.c                                              |    4 
 drivers/hid/amd-sfh-hid/amd_sfh_client.c                                |   12 
 drivers/hid/amd-sfh-hid/amd_sfh_common.h                                |    3 
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c                                  |    4 
 drivers/hid/hid-asus.c                                                  |    3 
 drivers/hid/hid-cp2112.c                                                |   10 
 drivers/hid/hid-multitouch.c                                            |   45 
 drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c                 |    2 
 drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h                 |    2 
 drivers/i2c/busses/i2c-designware-platdrv.c                             |    7 
 drivers/infiniband/hw/mlx5/devx.c                                       |    1 
 drivers/iommu/iommufd/eventq.c                                          |    9 
 drivers/iommu/iommufd/main.c                                            |   35 
 drivers/mmc/host/sdhci-cadence.c                                        |   11 
 drivers/net/can/rcar/rcar_can.c                                         |    8 
 drivers/net/can/spi/hi311x.c                                            |    1 
 drivers/net/can/sun4i_can.c                                             |    1 
 drivers/net/can/usb/etas_es58x/es58x_core.c                             |    3 
 drivers/net/can/usb/mcba_usb.c                                          |    1 
 drivers/net/can/usb/peak_usb/pcan_usb_core.c                            |    2 
 drivers/net/dsa/lantiq_gswip.c                                          |   21 
 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c                            |    2 
 drivers/net/ethernet/freescale/fec_main.c                               |    4 
 drivers/net/ethernet/intel/i40e/i40e.h                                  |    3 
 drivers/net/ethernet/intel/i40e/i40e_main.c                             |   26 
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c                      |  110 +
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h                      |    3 
 drivers/net/ethernet/marvell/octeontx2/af/cgx.c                         |    3 
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c                    |    2 
 drivers/net/ethernet/mellanox/mlx5/core/en_stats.c                      |    1 
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c                       |    2 
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.h                       |    1 
 drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c                   |   25 
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/action.c           |    7 
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws.c           |   18 
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/fs_hws_pools.c     |    8 
 drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws.h          |    7 
 drivers/net/phy/bcm-phy-ptp.c                                           |    6 
 drivers/net/phy/sfp.c                                                   |   24 
 drivers/net/tun.c                                                       |    3 
 drivers/net/wireless/intel/iwlwifi/pcie/tx.c                            |    3 
 drivers/net/wireless/virtual/virt_wifi.c                                |    4 
 drivers/pinctrl/mediatek/pinctrl-airoha.c                               |   31 
 drivers/platform/x86/lg-laptop.c                                        |   34 
 drivers/platform/x86/oxpec.c                                            |    7 
 drivers/spi/spi-cadence-quadspi.c                                       |   90 +
 drivers/ufs/core/ufs-mcq.c                                              |    4 
 drivers/usb/core/quirks.c                                               |    2 
 drivers/vhost/net.c                                                     |   33 
 drivers/video/fbdev/core/fbcon.c                                        |   13 
 fs/afs/server.c                                                         |    3 
 fs/btrfs/volumes.c                                                      |    5 
 fs/hugetlbfs/inode.c                                                    |   10 
 fs/netfs/buffered_read.c                                                |   10 
 fs/netfs/direct_read.c                                                  |    7 
 fs/netfs/direct_write.c                                                 |    6 
 fs/netfs/internal.h                                                     |    1 
 fs/netfs/objects.c                                                      |   30 
 fs/netfs/read_pgpriv2.c                                                 |    2 
 fs/netfs/read_single.c                                                  |    2 
 fs/netfs/write_issue.c                                                  |    3 
 fs/nfs/file.c                                                           |   33 
 fs/nfs/inode.c                                                          |    9 
 fs/nfs/internal.h                                                       |    2 
 fs/nfs/nfs42proc.c                                                      |   33 
 fs/nfs/nfstrace.h                                                       |    1 
 fs/proc/task_mmu.c                                                      |    3 
 fs/smb/client/smb2inode.c                                               |    2 
 fs/smb/server/transport_rdma.c                                          |   22 
 include/crypto/if_alg.h                                                 |    2 
 include/linux/firmware/imx/sm.h                                         |   47 
 include/linux/mlx5/fs.h                                                 |    2 
 include/net/bluetooth/hci_core.h                                        |   21 
 kernel/bpf/core.c                                                       |    5 
 kernel/bpf/verifier.c                                                   |    6 
 kernel/fork.c                                                           |    2 
 kernel/futex/requeue.c                                                  |    6 
 kernel/sched/ext_idle.c                                                 |   52 
 kernel/sched/ext_idle.h                                                 |    7 
 kernel/trace/fgraph.c                                                   |   12 
 kernel/trace/fprobe.c                                                   |    7 
 kernel/trace/trace_dynevent.c                                           |    4 
 kernel/trace/trace_osnoise.c                                            |    3 
 kernel/vhost_task.c                                                     |    3 
 mm/damon/sysfs.c                                                        |    4 
 mm/kmsan/core.c                                                         |   10 
 mm/kmsan/kmsan_test.c                                                   |   16 
 net/bluetooth/hci_event.c                                               |   30 
 net/bluetooth/hci_sync.c                                                |    7 
 net/bluetooth/mgmt.c                                                    |  259 +++-
 net/bluetooth/mgmt_util.c                                               |   46 
 net/bluetooth/mgmt_util.h                                               |    3 
 net/core/skbuff.c                                                       |    2 
 net/ipv4/nexthop.c                                                      |    7 
 net/smc/smc_loopback.c                                                  |   14 
 net/xfrm/xfrm_device.c                                                  |    2 
 net/xfrm/xfrm_state.c                                                   |    3 
 sound/pci/hda/patch_realtek.c                                           |   11 
 sound/soc/intel/boards/sof_es8336.c                                     |   10 
 sound/soc/intel/boards/sof_rt5682.c                                     |    7 
 sound/soc/intel/common/soc-acpi-intel-ptl-match.c                       |   32 
 sound/usb/mixer_quirks.c                                                |  571 +++++++---
 sound/usb/quirks.c                                                      |   24 
 sound/usb/usbaudio.h                                                    |    4 
 tools/testing/selftests/bpf/prog_tests/free_timer.c                     |    4 
 tools/testing/selftests/bpf/prog_tests/timer.c                          |    4 
 tools/testing/selftests/bpf/prog_tests/timer_crash.c                    |    4 
 tools/testing/selftests/bpf/prog_tests/timer_lockup.c                   |    4 
 tools/testing/selftests/bpf/prog_tests/timer_mim.c                      |    4 
 tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c    |   17 
 tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c |   18 
 tools/testing/selftests/net/fib_nexthops.sh                             |   12 
 153 files changed, 1832 insertions(+), 851 deletions(-)

Adrián Larumbe (1):
      drm/panthor: Defer scheduler entitiy destruction to queue release

Akinobu Mita (1):
      mm/damon/sysfs: do not ignore callback's return value in damon_sysfs_damon_call()

Aleksander Jan Bajkowski (1):
      net: sfp: add quirk for FLYPRO copper SFP+ module

Alexander Popov (1):
      x86/Kconfig: Reenable PTDUMP on i386

Alexandre Ghiti (1):
      riscv: Use an atomic xchg in pudp_huge_get_and_clear()

Alok Tiwari (2):
      scsi: ufs: mcq: Fix memory allocation checks for SQE and CQE
      bnxt_en: correct offset handling for IPv6 destination address

Amit Chaudhari (1):
      HID: asus: add support for missing PX series fn keys

Andrea Righi (2):
      sched_ext: idle: Make local functions static in ext_idle.c
      sched_ext: idle: Handle migration-disabled tasks in BPF code

Antheas Kapenekakis (1):
      platform/x86: oxpec: Add support for OneXPlayer X1 Mini Pro (Strix Point)

Balamurugan C (3):
      ASoC: Intel: soc-acpi: Add entry for sof_es8336 in PTL match table.
      ASoC: Intel: soc-acpi: Add entry for HDMI_In capture support in PTL match table
      ASoC: Intel: sof_rt5682: Add HDMI-In capture with rt5682 support for PTL.

Basavaraj Natikar (1):
      HID: amd_sfh: Add sync across amd sfh work functions

Benoît Monin (1):
      mmc: sdhci-cadence: add Mobileye eyeQ support

Carolina Jubran (1):
      net/mlx5e: Fix missing FEC RS stats for RS_544_514_INTERLEAVED_QUAD

Chen Ni (1):
      ALSA: usb-audio: Convert comma to semicolon

Chris Morgan (1):
      net: sfp: add quirk for Potron SFP+ XGSPON ONU Stick

Christian Loehle (1):
      cpufreq: Initialize cpufreq-based invariance before subsys

Christian Marangi (2):
      pinctrl: airoha: fix wrong PHY LED mux value for LED1 GPIO46
      pinctrl: airoha: fix wrong MDIO function bitmaks

Cristian Ciocaltea (8):
      ALSA: usb-audio: Fix code alignment in mixer_quirks
      ALSA: usb-audio: Fix whitespace & blank line issues in mixer_quirks
      ALSA: usb-audio: Fix block comments in mixer_quirks
      ALSA: usb-audio: Drop unnecessary parentheses in mixer_quirks
      ALSA: usb-audio: Avoid multiple assignments in mixer_quirks
      ALSA: usb-audio: Simplify NULL comparison in mixer_quirks
      ALSA: usb-audio: Remove unneeded wmb() in mixer_quirks
      ALSA: usb-audio: Add mixer quirk for Sony DualSense PS5

Cryolitia PukNgae (1):
      ALSA: usb-audio: move mixer_quirks' min_mute into common quirk

Dan Carpenter (1):
      octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()

Daniel Lee (1):
      platform/x86: lg-laptop: Fix WMAB call in fan_mode_store()

Eric Biggers (2):
      crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
      kmsan: fix out-of-bounds access to shadow memory

Eric Huang (1):
      drm/amdkfd: fix p2p links bug in topology

Geert Uytterhoeven (1):
      can: rcar_can: rcar_can_resume(): fix s2ram with PSCI

Greg Kroah-Hartman (1):
      Linux 6.16.10

Hans de Goede (1):
      gpiolib: Extend software-node support to support secondary software-nodes

Heikki Krogerus (1):
      i2c: designware: Add quirk for Intel Xe

Ido Schimmel (2):
      nexthop: Forbid FDB status change while nexthop is in a group
      selftests: fib_nexthops: Fix creation of non-FDB nexthops

Ioana Ciornei (1):
      gpio: regmap: fix memory leak of gpio_regmap structure

Jacob Keller (2):
      broadcom: fix support for PTP_PEROUT_DUTY_CYCLE
      broadcom: fix support for PTP_EXTTS_REQUEST2 ioctl

Jakub Acs (1):
      fs/proc/task_mmu: check p->vec_buf for NULL

James Guan (1):
      wifi: virt_wifi: Fix page fault on connect

Jason Baron (1):
      net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS

Jason Gunthorpe (1):
      iommufd: Fix race during abort for file descriptors

Jason Wang (1):
      vhost-net: flush batched before enabling notifications

Jiayi Li (1):
      usb: core: Add 0x prefix to quirks debug output

Jihed Chaibi (1):
      ARM: dts: kirkwood: Fix sound DAI cells for OpenRD clients

Jimmy Hon (1):
      arm64: dts: rockchip: Fix the headphone detection on the orangepi 5

Jinjiang Tu (1):
      mm/hugetlb: fix folio is still mapped when deleted

Jiri Olsa (1):
      bpf: Check the helper function is valid in get_helper_proto

Johannes Berg (2):
      wifi: iwlwifi: fix byte count table for old devices
      wifi: iwlwifi: pcie: fix byte count table for some devices

Josua Mayer (3):
      arm64: dts: marvell: cn913x-solidrun: fix sata ports status
      arm64: dts: marvell: cn9132-clearfog: disable eMMC high-speed modes
      arm64: dts: marvell: cn9132-clearfog: fix multi-lane pci x2 and x4 ports

Kerem Karabay (4):
      HID: multitouch: Get the contact ID from HID_DG_TRANSDUCER_INDEX fields in case of Apple Touch Bar
      HID: multitouch: support getting the tip state from HID_DG_TOUCH fields in Apple Touch Bar
      HID: multitouch: take cls->maxcontacts into account for Apple Touch Bar even without a HID_DG_CONTACTMAX field
      HID: multitouch: specify that Apple Touch Bar is direct

Khairul Anuar Romli (2):
      spi: cadence-quadspi: Implement refcount to handle unbind during busy
      spi: cadence-qspi: defer runtime support on socfpga if reset bit is enabled

Leon Hwang (2):
      bpf: Reject bpf_timer for PREEMPT_RT
      selftests/bpf: Skip timer cases when bpf_timer is not supported

Louis-Alexis Eyraud (3):
      drm/panfrost: Drop duplicated Mediatek supplies arrays
      drm/panfrost: Commonize Mediatek power domain array definitions
      drm/panfrost: Add support for Mali on the MT8370 SoC

Lucas De Marchi (1):
      drm/xe: Fix build with CONFIG_MODULES=n

Luiz Augusto von Dentz (4):
      Bluetooth: hci_sync: Fix hci_resume_advertising_sync
      Bluetooth: hci_event: Fix UAF in hci_conn_tx_dequeue
      Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync
      Bluetooth: MGMT: Fix possible UAFs

Lukasz Czapnik (8):
      i40e: add validation for ring_len param
      i40e: fix idx validation in i40e_validate_queue_map
      i40e: fix idx validation in config queues msg
      i40e: fix input validation logic for action_meta
      i40e: fix validation of VF state in get resources
      i40e: add max boundary check for VF filters
      i40e: add mask to apply valid bits for itr_idx
      i40e: improve VF MAC filters accounting

Marc Kleine-Budde (1):
      net: fec: rename struct fec_devinfo fec_imx6x_info -> fec_imx6sx_info

Mario Limonciello (AMD) (1):
      gpiolib: acpi: Add quirk for ASUS ProArt PX13

Mark Harmstone (1):
      btrfs: don't allow adding block device of less than 1 MB

Masami Hiramatsu (Google) (3):
      tracing: dynevent: Add a missing lockdown check on dynevent
      tracing: fgraph: Protect return handler from recursion loop
      tracing: fprobe: Fix to remove recorded module addresses from filter

Matthew Schwartz (1):
      drm/amd/display: Only restore backlight after amdgpu_dm_init or dm_resume

Max Kellermann (1):
      netfs: fix reference leak

Melissa Wen (1):
      drm/amd/display: remove output_tf_change flag

Michael S. Tsirkin (1):
      Revert "vhost/net: Defer TX queue re-enable until after sendmsg"

Michal Wajdeczko (1):
      drm/xe/vf: Don't expose sysfs attributes not applicable for VFs

Moshe Shemesh (1):
      net/mlx5: fs, fix UAF in flow counter release

Nirmoy Das (1):
      drm/ast: Use msleep instead of mdelay for edid read

Nobuhiro Iwamatsu (1):
      ARM: dts: socfpga: sodia: Fix mdio bus probe and PHY address

Or Har-Toov (1):
      IB/mlx5: Fix obj_type mismatch for SRQ event subscriptions

Peng Fan (4):
      firmware: imx: Add stub functions for SCMI MISC API
      firmware: imx: Add stub functions for SCMI LMM API
      firmware: imx: Add stub functions for SCMI CPU API
      arm64: dts: imx8mp: Correct thermal sensor index

Petr Malat (1):
      ethernet: rvu-af: Remove slash from the driver name

Sabrina Dubroca (2):
      xfrm: xfrm_alloc_spi shouldn't use 0 as SPI
      xfrm: fix offloading of cross-family tunnels

Samasth Norway Ananda (1):
      fbcon: fix integer overflow in fbcon_do_set_font

Sang-Heon Jeon (1):
      smb: client: fix wrong index reference in smb2_compound_op()

Sasha Levin (2):
      Revert "drm/xe/guc: Set RCS/CCS yield policy"
      Revert "drm/xe/guc: Enable extended CAT error reporting"

Sebastian Andrzej Siewior (3):
      vhost: Take a reference on the task in struct vhost_task.
      futex: Prevent use-after-free during requeue-PI
      futex: Use correct exit on failure from futex_hash_allocate_default()

Sidraya Jayagond (1):
      net/smc: fix warning in smc_rx_splice() when calling get_page()

Stefan Binding (1):
      ALSA: hda/realtek: Add support for ASUS NUC using CS35L41 HDA

Stefan Metzmacher (2):
      smb: server: don't use delayed_work for post_recv_credits_work
      smb: server: use disable_work_sync in transport_rdma.c

Stéphane Grosjean (1):
      can: peak_usb: fix shift-out-of-bounds issue

Suraj Kandpal (1):
      drm/i915/ddi: Guard reg_val against a INVALID_TRANSCODER

Sébastien Szymanski (1):
      HID: cp2112: fix setter callbacks return value

Takashi Iwai (1):
      ALSA: usb-audio: Fix build with CONFIG_INPUT=n

Takashi Sakamoto (1):
      firewire: core: fix overlooked update of subsystem ABI version

Thomas Gleixner (1):
      x86/topology: Implement topology_is_core_online() to address SMT regression

Thomas Hellström (1):
      drm/xe: Don't copy pinned kernel bos twice on suspend

Thomas Zimmermann (1):
      fbcon: Fix OOB access in font allocation

Trond Myklebust (2):
      NFS: Protect against 'eof page pollution'
      NFSv4.2: Protect copy offload and clone against 'eof page pollution'

Vincent Mailhol (4):
      can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow
      can: hi311x: populate ndo_change_mtu() to prevent buffer overflow
      can: sun4i_can: populate ndo_change_mtu() to prevent buffer overflow
      can: mcba_usb: populate ndo_change_mtu() to prevent buffer overflow

Vlad Dogaru (1):
      net/mlx5: HWS, remove unused create_dest_array parameter

Vladimir Oltean (2):
      net: dsa: lantiq_gswip: move gswip_add_single_port_br() call to port_setup()
      net: dsa: lantiq_gswip: suppress -EINVAL errors for bridge FDB entries added to the CPU port

Wang Liang (2):
      net: tun: Update napi->skb after XDP process
      tracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()

Xing Guo (1):
      selftests/fs/mount-notify: Fix compilation failure.

Xinpeng Sun (1):
      HID: intel-thc-hid: intel-quickspi: Add WCL Device IDs

Yevgeny Kliteynik (1):
      net/mlx5: HWS, ignore flow level for multi-dest table

Yifan Zhang (1):
      amd/amdkfd: correct mem limit calculation for small APUs

Zabelin Nikita (1):
      drm/gma500: Fix null dereference in hdmi teardown

Zhen Ni (1):
      afs: Fix potential null pointer dereference in afs_put_server

noble.yang (1):
      ALSA: usb-audio: Add DSD support for Comtrue USB Audio device

qaqland (1):
      ALSA: usb-audio: Add mute TLV for playback volumes on more devices

From - Fri Oct 17 14:26:34 2025
Delivery-date: Thu, 02 Oct 2025 14:36:34 +0000
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Date: Thu, 2 Oct 2025 09:36:27 -0500
From: Bjorn Helgaas <[email-masked]>
To: Siddharth Vadapalli <[email-masked]>
Cc: [email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked],
	[email-masked], [email-masked]
Subject: Re: [PATCH 2/2] PCI: keystone: Remove the __init macro for the
 ks_pcie_host_init() callback
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On Fri, Sep 12, 2025 at 03:37:59PM +0530, Siddharth Vadapalli wrote:
> The ks_pcie_host_init() callback registered by the driver is invoked by
> dw_pcie_host_init(). Since the driver probe is not guaranteed to finish
> before the kernel initialization phase, the memory associated with
> ks_pcie_host_init() may already be freed by free_initmem().
> 
> It is observed in practice that the print associated with free_initmem()
> which is:
> 	"Freeing unused kernel memory: ..."
> is displayed before the driver is probed, following which an exception is
> triggered when ks_pcie_host_init() is invoked which looks like:
> 
> 	Unable to handle kernel paging request at virtual address ...
> 	Mem abort info:
> 	...
> 	pc : ks_pcie_host_init+0x0/0x540
> 	lr : dw_pcie_host_init+0x170/0x498
> 	...
> 	ks_pcie_host_init+0x0/0x540 (P)
> 	ks_pcie_probe+0x728/0x84c
> 	platform_probe+0x5c/0x98
> 	really_probe+0xbc/0x29c
> 	__driver_probe_device+0x78/0x12c
> 	driver_probe_device+0xd8/0x15c
> 	...
> 
> Fix this by removing the "__init" macro associated with the
> ks_pcie_host_init() callback and the ks_pcie_init_id() function that it
> internally invokes.
> 
> Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver")
> Cc: <[email-masked]>
> Signed-off-by: Siddharth Vadapalli <[email-masked]>

I dropped this from pci/controller/keystone because of the resulting
section mismatch:

  https://lore.kernel.org/r/[email-masked]

ks_pcie_host_init() calls hook_fault_code(), which is __init, so we
can't make ks_pcie_host_init() non-__init.

Both are bad problems, but there's no point in just swapping one
problem for a different one.

> ---
>  drivers/pci/controller/dwc/pci-keystone.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
> index 21808a9e5158..c6e082dcb3bc 100644
> --- a/drivers/pci/controller/dwc/pci-keystone.c
> +++ b/drivers/pci/controller/dwc/pci-keystone.c
> @@ -799,7 +799,7 @@ static int ks_pcie_fault(unsigned long addr, unsigned int fsr,
>  }
>  #endif
>  
> -static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie)
> +static int ks_pcie_init_id(struct keystone_pcie *ks_pcie)
>  {
>  	int ret;
>  	unsigned int id;
> @@ -831,7 +831,7 @@ static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie)
>  	return 0;
>  }
>  
> -static int __init ks_pcie_host_init(struct dw_pcie_rp *pp)
> +static int ks_pcie_host_init(struct dw_pcie_rp *pp)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
>  	struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
> -- 
> 2.43.0
> 

From - Fri Oct 17 14:26:34 2025
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Date: Thu, 2 Oct 2025 16:45:17 +0200
From: Johan Hovold <[email-masked]>
To: Robin Murphy <[email-masked]>
Cc: Joerg Roedel <[email-masked]>, Will Deacon <[email-masked]>,
	Sven Peter <[email-masked]>, Janne Grunau <[email-masked]>,
	Rob Clark <[email-masked]>,
	Marek Szyprowski <[email-masked]>,
	Yong Wu <[email-masked]>,
	Matthias Brugger <[email-masked]>,
	AngeloGioacchino Del Regno <[email-masked]>,
	Chen-Yu Tsai <[email-masked]>,
	Thierry Reding <[email-masked]>,
	Krishna Reddy <[email-masked]>, [email-masked],
	[email-masked], [email-masked],
	Suman Anna <[email-masked]>
Subject: Re: [PATCH 11/14] iommu/omap: fix device leaks on probe_device()
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On Thu, Oct 02, 2025 at 01:05:08PM +0100, Robin Murphy wrote:
> On 2025-09-25 1:27 pm, Johan Hovold wrote:

> > @@ -1663,22 +1663,22 @@ static struct iommu_device *omap_iommu_probe_device(struct device *dev)
> >   	for (i = 0, tmp = arch_data; i < num_iommus; i++, tmp++) {
> >   		np = of_parse_phandle(dev->of_node, "iommus", i);
> >   		if (!np) {
> > -			kfree(arch_data);
> > -			return ERR_PTR(-EINVAL);
> > +			ret = -EINVAL;
> > +			goto err_put_iommus;
> >   		}
> >   
> >   		pdev = of_find_device_by_node(np);
> >   		if (!pdev) {
> >   			of_node_put(np);
> > -			kfree(arch_data);
> > -			return ERR_PTR(-ENODEV);
> > +			ret = -ENODEV;
> > +			goto err_put_iommus;
> >   		}
> >   
> >   		oiommu = platform_get_drvdata(pdev);
> >   		if (!oiommu) {
> >   			of_node_put(np);
> > -			kfree(arch_data);
> > -			return ERR_PTR(-EINVAL);
> > +			ret = -EINVAL;
> > +			goto err_put_iommus;
> >   		}
> >   
> >   		tmp->iommu_dev = oiommu;
> > @@ -1697,17 +1697,28 @@ static struct iommu_device *omap_iommu_probe_device(struct device *dev)
> >   	oiommu = arch_data->iommu_dev;
> >   
> >   	return &oiommu->iommu;
> > +
> > +err_put_iommus:
> > +	for (tmp = arch_data; tmp->dev; tmp++)
> > +		put_device(tmp->dev);
> 
> This should just pair with the of_node_put() calls (other than the first 
> one, of course), i.e. do it in the success path as well and drop the 
> release_device change below. It doesn't serve any purpose for client 
> devices to hold additional references on the IOMMU device when those are 
> strictly within the lifetime of the IOMMU driver being bound to it anyway.

I kept the reference until release() (even if not strictly needed) as I
mistakenly thought the driver was using the arch data device pointer
directly.

Turns out that one has never been used so I'll drop it as well as part
of v2.

Johan

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From: Greg Kroah-Hartman <[email-masked]>
To: [email-masked],
	[email-masked],
	[email-masked],
	[email-masked]
Cc: [email-masked],
	[email-masked],
	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.6.109
Date: Thu,  2 Oct 2025 15:30:32 +0200
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I'm announcing the release of the 6.6.109 kernel.

All users of the 6.6 kernel series must upgrade.

The updated 6.6.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.6.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Makefile                                                              |    2 
 arch/arm/boot/dts/intel/socfpga/socfpga_cyclone5_sodia.dts            |    6 
 arch/arm/boot/dts/marvell/kirkwood-openrd-client.dts                  |    2 
 arch/arm/mach-bcm/Kconfig                                             |    1 
 arch/arm64/boot/dts/freescale/imx8mp.dtsi                             |    4 
 arch/s390/kernel/perf_cpum_cf.c                                       |    4 
 arch/um/drivers/mconsole_user.c                                       |    2 
 drivers/block/loop.c                                                  |   40 +
 drivers/cpufreq/cpufreq.c                                             |   20 
 drivers/edac/skx_common.h                                             |    1 
 drivers/firewire/core-cdev.c                                          |    2 
 drivers/gpio/gpiolib.c                                                |   19 
 drivers/gpu/drm/amd/amdgpu/amdgpu.h                                   |    2 
 drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c                   |    2 
 drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppevvmath.h                    |   14 
 drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c               |    2 
 drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c                  |    3 
 drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c                  |    3 
 drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c                                |    2 
 drivers/gpu/drm/ast/ast_dp.c                                          |    2 
 drivers/gpu/drm/gma500/oaktrail_hdmi.c                                |    2 
 drivers/gpu/drm/i915/display/intel_backlight.c                        |    5 
 drivers/gpu/drm/radeon/evergreen_cs.c                                 |    2 
 drivers/hid/hid-asus.c                                                |    3 
 drivers/hwmon/adt7475.c                                               |   24 
 drivers/i2c/busses/i2c-designware-platdrv.c                           |    7 
 drivers/infiniband/hw/mlx5/devx.c                                     |    1 
 drivers/input/touchscreen/cyttsp4_core.c                              |    2 
 drivers/irqchip/irq-sun6i-r.c                                         |    2 
 drivers/media/dvb-frontends/stv0367_priv.h                            |    3 
 drivers/mmc/host/sdhci-cadence.c                                      |   11 
 drivers/net/can/rcar/rcar_can.c                                       |    8 
 drivers/net/can/spi/hi311x.c                                          |    1 
 drivers/net/can/sun4i_can.c                                           |    1 
 drivers/net/can/usb/etas_es58x/es58x_core.c                           |    3 
 drivers/net/can/usb/etas_es58x/es58x_devlink.c                        |    2 
 drivers/net/can/usb/mcba_usb.c                                        |    1 
 drivers/net/can/usb/peak_usb/pcan_usb_core.c                          |    2 
 drivers/net/dsa/lantiq_gswip.c                                        |   37 -
 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c                          |    2 
 drivers/net/ethernet/intel/i40e/i40e.h                                |    4 
 drivers/net/ethernet/intel/i40e/i40e_ethtool.c                        |   25 
 drivers/net/ethernet/intel/i40e/i40e_main.c                           |   26 
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c                    |  110 ++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h                    |    3 
 drivers/net/ethernet/marvell/octeontx2/af/cgx.c                       |    3 
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c                  |    2 
 drivers/net/fjes/fjes_main.c                                          |    4 
 drivers/net/wireless/virtual/virt_wifi.c                              |    4 
 drivers/nfc/pn544/i2c.c                                               |    2 
 drivers/platform/x86/sony-laptop.c                                    |    1 
 drivers/scsi/isci/init.c                                              |    6 
 drivers/staging/media/atomisp/pci/hive_isp_css_include/math_support.h |    5 
 drivers/ufs/core/ufs-mcq.c                                            |    4 
 drivers/usb/core/quirks.c                                             |    2 
 drivers/video/fbdev/core/fbcon.c                                      |   13 
 fs/afs/server.c                                                       |    3 
 fs/btrfs/tree-checker.c                                               |    2 
 fs/hugetlbfs/inode.c                                                  |   10 
 fs/smb/client/smb2inode.c                                             |    2 
 fs/smb/server/transport_rdma.c                                        |   18 
 include/crypto/if_alg.h                                               |    2 
 include/linux/compiler.h                                              |    9 
 include/linux/minmax.h                                                |  220 ++++---
 include/linux/mm.h                                                    |   55 +
 include/linux/swap.h                                                  |   10 
 include/net/bluetooth/hci_core.h                                      |   21 
 kernel/bpf/verifier.c                                                 |    4 
 kernel/futex/requeue.c                                                |    6 
 kernel/trace/preemptirq_delay_test.c                                  |    2 
 kernel/trace/trace_dynevent.c                                         |    4 
 kernel/vhost_task.c                                                   |    3 
 lib/btree.c                                                           |    1 
 lib/decompress_unlzma.c                                               |    2 
 lib/vsprintf.c                                                        |    2 
 mm/gup.c                                                              |   28 
 mm/kmsan/core.c                                                       |   10 
 mm/kmsan/kmsan_test.c                                                 |   16 
 mm/migrate_device.c                                                   |   42 -
 mm/mlock.c                                                            |    6 
 mm/swap.c                                                             |    4 
 mm/zsmalloc.c                                                         |    2 
 net/bluetooth/hci_event.c                                             |   26 
 net/bluetooth/hci_sync.c                                              |    7 
 net/core/skbuff.c                                                     |    2 
 net/ipv4/nexthop.c                                                    |    7 
 net/xfrm/xfrm_state.c                                                 |    3 
 sound/usb/mixer_quirks.c                                              |  295 +++++++++-
 sound/usb/quirks.c                                                    |   24 
 sound/usb/usbaudio.h                                                  |    4 
 tools/testing/selftests/mm/mremap_test.c                              |    2 
 tools/testing/selftests/net/fib_nexthops.sh                           |   12 
 tools/testing/selftests/seccomp/seccomp_bpf.c                         |    2 
 93 files changed, 984 insertions(+), 350 deletions(-)

Alok Tiwari (2):
      scsi: ufs: mcq: Fix memory allocation checks for SQE and CQE
      bnxt_en: correct offset handling for IPv6 destination address

Amit Chaudhari (1):
      HID: asus: add support for missing PX series fn keys

Benoît Monin (1):
      mmc: sdhci-cadence: add Mobileye eyeQ support

Chen Ni (1):
      ALSA: usb-audio: Convert comma to semicolon

Christian Loehle (1):
      cpufreq: Initialize cpufreq-based invariance before subsys

Cristian Ciocaltea (6):
      ALSA: usb-audio: Fix block comments in mixer_quirks
      ALSA: usb-audio: Drop unnecessary parentheses in mixer_quirks
      ALSA: usb-audio: Avoid multiple assignments in mixer_quirks
      ALSA: usb-audio: Simplify NULL comparison in mixer_quirks
      ALSA: usb-audio: Remove unneeded wmb() in mixer_quirks
      ALSA: usb-audio: Add mixer quirk for Sony DualSense PS5

Cryolitia PukNgae (1):
      ALSA: usb-audio: move mixer_quirks' min_mute into common quirk

Dan Carpenter (1):
      octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()

David Hildenbrand (2):
      mm/gup: revert "mm: gup: fix infinite loop within __get_longterm_locked"
      mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()

David Laight (7):
      minmax.h: add whitespace around operators and after commas
      minmax.h: update some comments
      minmax.h: reduce the #define expansion of min(), max() and clamp()
      minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
      minmax.h: move all the clamp() definitions after the min/max() ones
      minmax.h: simplify the variants of clamp()
      minmax.h: remove some #defines that are only expanded once

Eric Biggers (2):
      crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
      kmsan: fix out-of-bounds access to shadow memory

Florian Fainelli (1):
      ARM: bcm: Select ARM_GIC_V3 for ARCH_BRCMSTB

Geert Uytterhoeven (1):
      can: rcar_can: rcar_can_resume(): fix s2ram with PSCI

Greg Kroah-Hartman (1):
      Linux 6.6.109

Guenter Roeck (1):
      drm/i915/backlight: Return immediately when scale() finds invalid parameters

Hans de Goede (1):
      gpiolib: Extend software-node support to support secondary software-nodes

Heikki Krogerus (1):
      i2c: designware: Add quirk for Intel Xe

Hugh Dickins (3):
      mm/gup: check ref_count instead of lru before migration
      mm/gup: local lru_add_drain() to avoid lru_add_drain_all()
      mm: folio_may_be_lru_cached() unless folio_test_large()

Ido Schimmel (2):
      nexthop: Forbid FDB status change while nexthop is in a group
      selftests: fib_nexthops: Fix creation of non-FDB nexthops

James Guan (1):
      wifi: virt_wifi: Fix page fault on connect

Jan Kara (1):
      loop: Avoid updating block size under exclusive owner

Jason Baron (1):
      net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS

Jiayi Li (1):
      usb: core: Add 0x prefix to quirks debug output

Jihed Chaibi (1):
      ARM: dts: kirkwood: Fix sound DAI cells for OpenRD clients

Jinjiang Tu (1):
      mm/hugetlb: fix folio is still mapped when deleted

Justin Bronder (1):
      i40e: increase max descriptors for XL710

Kefeng Wang (1):
      mm: migrate_device: use more folio in migrate_device_finalize()

Leon Hwang (1):
      bpf: Reject bpf_timer for PREEMPT_RT

Linus Torvalds (5):
      minmax: make generic MIN() and MAX() macros available everywhere
      minmax: simplify min()/max()/clamp() implementation
      minmax: don't use max() in situations that want a C constant expression
      minmax: improve macro expansion and type checking
      minmax: fix up min3() and max3() too

Luiz Augusto von Dentz (2):
      Bluetooth: hci_sync: Fix hci_resume_advertising_sync
      Bluetooth: hci_event: Fix UAF in hci_acl_create_conn_sync

Lukasz Czapnik (8):
      i40e: fix idx validation in i40e_validate_queue_map
      i40e: fix idx validation in config queues msg
      i40e: fix input validation logic for action_meta
      i40e: fix validation of VF state in get resources
      i40e: add max boundary check for VF filters
      i40e: add mask to apply valid bits for itr_idx
      i40e: improve VF MAC filters accounting
      i40e: add validation for ring_len param

Martin Schiller (1):
      net: dsa: lantiq_gswip: do also enable or disable cpu port

Masami Hiramatsu (Google) (1):
      tracing: dynevent: Add a missing lockdown check on dynevent

Nathan Chancellor (1):
      s390/cpum_cf: Fix uninitialized warning after backport of ce971233242b

Nirmoy Das (1):
      drm/ast: Use msleep instead of mdelay for edid read

Nobuhiro Iwamatsu (1):
      ARM: dts: socfpga: sodia: Fix mdio bus probe and PHY address

Or Har-Toov (1):
      IB/mlx5: Fix obj_type mismatch for SRQ event subscriptions

Peng Fan (1):
      arm64: dts: imx8mp: Correct thermal sensor index

Petr Malat (1):
      ethernet: rvu-af: Remove slash from the driver name

Sabrina Dubroca (1):
      xfrm: xfrm_alloc_spi shouldn't use 0 as SPI

Samasth Norway Ananda (1):
      fbcon: fix integer overflow in fbcon_do_set_font

Sang-Heon Jeon (1):
      smb: client: fix wrong index reference in smb2_compound_op()

Sebastian Andrzej Siewior (2):
      vhost: Take a reference on the task in struct vhost_task.
      futex: Prevent use-after-free during requeue-PI

Shivank Garg (1):
      mm: add folio_expected_ref_count() for reference count calculation

Stefan Metzmacher (1):
      smb: server: don't use delayed_work for post_recv_credits_work

Stéphane Grosjean (1):
      can: peak_usb: fix shift-out-of-bounds issue

Takashi Iwai (1):
      ALSA: usb-audio: Fix build with CONFIG_INPUT=n

Takashi Sakamoto (1):
      firewire: core: fix overlooked update of subsystem ABI version

Thomas Zimmermann (1):
      fbcon: Fix OOB access in font allocation

Vincent Mailhol (4):
      can: etas_es58x: populate ndo_change_mtu() to prevent buffer overflow
      can: hi311x: populate ndo_change_mtu() to prevent buffer overflow
      can: sun4i_can: populate ndo_change_mtu() to prevent buffer overflow
      can: mcba_usb: populate ndo_change_mtu() to prevent buffer overflow

Vladimir Oltean (2):
      net: dsa: lantiq_gswip: move gswip_add_single_port_br() call to port_setup()
      net: dsa: lantiq_gswip: suppress -EINVAL errors for bridge FDB entries added to the CPU port

Zabelin Nikita (1):
      drm/gma500: Fix null dereference in hdmi teardown

Zhen Ni (1):
      afs: Fix potential null pointer dereference in afs_put_server

noble.yang (1):
      ALSA: usb-audio: Add DSD support for Comtrue USB Audio device

qaqland (1):
      ALSA: usb-audio: Add mute TLV for playback volumes on more devices

From - Fri Oct 17 14:26:34 2025
Delivery-date: Thu, 02 Oct 2025 13:32:16 +0000
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	Greg Kroah-Hartman <[email-masked]>
Subject: Linux 6.12.50
Date: Thu,  2 Oct 2025 15:30:38 +0200
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I'm announcing the release of the 6.12.50 kernel.

All users of the 6.12 kernel series must upgrade.

The updated 6.12.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.12.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

 Documentation/admin-guide/laptops/lg-laptop.rst            |    4 
 Makefile                                                   |    2 
 arch/arm/boot/dts/intel/socfpga/socfpga_cyclone5_sodia.dts |    6 
 arch/arm/boot/dts/marvell/kirkwood-openrd-client.dts       |    2 
 arch/arm64/boot/dts/freescale/imx8mp.dtsi                  |    4 
 arch/arm64/boot/dts/marvell/cn9132-clearfog.dts            |   16 
 arch/arm64/boot/dts/marvell/cn9132-sr-cex7.dtsi            |    8 
 drivers/cpufreq/cpufreq.c                                  |   20 
 drivers/firewire/core-cdev.c                               |    2 
 drivers/gpio/gpiolib.c                                     |   21 
 drivers/gpu/drm/ast/ast_dp.c                               |    2 
 drivers/gpu/drm/gma500/oaktrail_hdmi.c                     |    2 
 drivers/gpu/drm/i915/display/intel_backlight.c             |    5 
 drivers/gpu/drm/panthor/panthor_sched.c                    |    8 
 drivers/hid/amd-sfh-hid/amd_sfh_client.c                   |   12 
 drivers/hid/amd-sfh-hid/amd_sfh_common.h                   |    3 
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c                     |    4 
 drivers/hid/hid-asus.c                                     |    3 
 drivers/i2c/busses/i2c-designware-platdrv.c                |    7 
 drivers/infiniband/hw/mlx5/devx.c                          |    1 
 drivers/iommu/iommufd/fault.c                              |    4 
 drivers/iommu/iommufd/main.c                               |   34 
 drivers/mmc/host/sdhci-cadence.c                           |   11 
 drivers/net/can/rcar/rcar_can.c                            |    8 
 drivers/net/can/spi/hi311x.c                               |    1 
 drivers/net/can/sun4i_can.c                                |    1 
 drivers/net/can/usb/etas_es58x/es58x_core.c                |    3 
 drivers/net/can/usb/mcba_usb.c                             |    1 
 drivers/net/can/usb/peak_usb/pcan_usb_core.c               |    2 
 drivers/net/dsa/lantiq_gswip.c                             |   21 
 drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c               |    2 
 drivers/net/ethernet/freescale/fec_main.c                  |    4 
 drivers/net/ethernet/intel/i40e/i40e.h                     |    3 
 drivers/net/ethernet/intel/i40e/i40e_main.c                |   26 
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c         |  110 +-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h         |    3 
 drivers/net/ethernet/marve