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)
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < d11ae22a8beee9771d933c1e5c95e217edcdbd38; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 16ce8fd94da8599bb6f0496895d392a69aead1c0; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 390d757621f5f35d11a63ed7d9d3262ead240064; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 8a1b1655a490a492a5a6987254c935ecce4eb9de; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < f22f4754aaa47d8c59f166ba3042182859e5dff7 |
| Linux | Linux | 4.15 |
References
- https://git.kernel.org/stable/c/16ce8fd94da8599bb6f0496895d392a69aead1c0
- https://git.kernel.org/stable/c/390d757621f5f35d11a63ed7d9d3262ead240064Patch
- https://git.kernel.org/stable/c/8a1b1655a490a492a5a6987254c935ecce4eb9dePatch
- https://git.kernel.org/stable/c/d11ae22a8beee9771d933c1e5c95e217edcdbd38
- https://git.kernel.org/stable/c/f22f4754aaa47d8c59f166ba3042182859e5dff7Patch
Timeline
- Published
- Oct 21, 2024
- Last modified
- Oct 30, 2026
- NVD status
- Modified