Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for head_pipe in dcn201_acquire_free_pipe_for_layer This commit addresses a potential null pointer dereference issue in the `dcn201_acquire_free_pipe_for_layer` function. The issue could occur when `head_pipe` is null. The fix adds a check to ensure `head_pipe` is not null before asserting it. If `head_pipe` is null, the function returns NULL to prevent a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn201/dcn201_resource.c:1016 dcn201_acquire_free_pipe_for_layer() error: we previously assumed 'head_pipe' could be null (see line 1010)
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < d11ae22a8beee9771d933c1e5c95e217edcdbd38affected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 16ce8fd94da8599bb6f0496895d392a69aead1c0affected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 390d757621f5f35d11a63ed7d9d3262ead240064affected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 8a1b1655a490a492a5a6987254c935ecce4eb9deaffected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < f22f4754aaa47d8c59f166ba3042182859e5dff7affected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected6.1.191 to ≤ 6.1.*unaffected6.6.79 to ≤ 6.6.*unaffected6.10.14 to ≤ 6.10.*unaffected6.11.3 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d11ae22a8beee9771d933c1e5c95e217edcdbd38 ↗
- https://git.kernel.org/stable/c/16ce8fd94da8599bb6f0496895d392a69aead1c0 ↗
- https://git.kernel.org/stable/c/390d757621f5f35d11a63ed7d9d3262ead240064 ↗
- https://git.kernel.org/stable/c/8a1b1655a490a492a5a6987254c935ecce4eb9de ↗
- https://git.kernel.org/stable/c/f22f4754aaa47d8c59f166ba3042182859e5dff7 ↗