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Sat, 29 Nov 2025 09:34:03 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id SOEJCQu+KmnuaQAAD6G6ig (envelope-from ); Sat, 29 Nov 2025 09:34:03 +0000 Date: Sat, 29 Nov 2025 10:34:02 +0100 Message-ID: <87y0npchdh.wl-tiwai@suse.de> From: Takashi Iwai To: Junrui Luo Cc: Clemens Ladisch , Takashi Sakamoto , Jaroslav Kysela , Takashi Iwai , Takashi Iwai , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, Yuhao Jiang , stable@vger.kernel.org Subject: Re: [PATCH] ALSA: dice: fix buffer overflow in detect_stream_formats() In-Reply-To: References: User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.1 Mule/6.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spamd-Result: default: False [-3.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; 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[213.196.21.55 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, 28 Nov 2025 05:06:31 +0100, Junrui Luo wrote: > > The function detect_stream_formats() reads the stream_count value directly > from a FireWire device without validating it. This can lead to > out-of-bounds writes when a malicious device provides a stream_count value > greater than MAX_STREAMS. > > Fix by applying the same validation to both TX and RX stream counts in > detect_stream_formats(). > > Reported-by: Yuhao Jiang > Reported-by: Junrui Luo > Fixes: 58579c056c1c ("ALSA: dice: use extended protocol to detect available stream formats") > Cc: stable@vger.kernel.org > Signed-off-by: Junrui Luo Applied now. Thanks. 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