c: # v6.7+ Cc: Christian König Cc: Arunpravin Paneer Selvam Suggested-by: Matthew Auld Signed-off-by: Sanjay Yadav Reviewed-by: Matthew Auld Reviewed-by: Arunpravin Paneer Selvam Signed-off-by: Arunpravin Paneer Selvam Link: https://patch.msgid.link/20260108113227.2101872-5-sanjay.kumar.yadav@intel.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_buddy.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c index 8308116058cc1..fd34d3755f7c5 100644 --- a/drivers/gpu/drm/drm_buddy.c +++ b/drivers/gpu/drm/drm_buddy.c @@ -1156,6 +1156,15 @@ int drm_buddy_alloc_blocks(struct drm_buddy *mm, order = fls(pages) - 1; min_order = ilog2(min_block_size) - ilog2(mm->chunk_size); + if (order > mm->max_order || size > mm->size) { + if ((flags & DRM_BUDDY_CONTIGUOUS_ALLOCATION) && + !(flags & DRM_BUDDY_RANGE_ALLOCATION)) + return __alloc_contig_try_harder(mm, original_size, + original_min_size, blocks); + + return -EINVAL; + } + do { order = min(order, (unsigned int)fls(pages) - 1); BUG_ON(order > mm->max_order); -- 2.51.0[PATCH 6.19 648/844] drm/buddy: Prevent BUG_ON by validating rounded allocationSasha Levin undefinedlinux-kernel@vger.kernel.org, stable@vger.kernel.org undefined undefined undefined undefined undefined undefined–c†©