Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add null check for head_pipe in dcn32_acquire_idle_pipe_for_head_pipe_in_layer
This commit addresses a potential null pointer dereference issue in the `dcn32_acquire_idle_pipe_for_head_pipe_in_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/dcn32/dcn32_resource.c:2690 dcn32_acquire_idle_pipe_for_head_pipe_in_layer() error: we previously assumed 'head_pipe' could be null (see line 2681)
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, < 360eebfdd0ac5acd45a5fb888c2caecf19093b3f; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 180280f3c4621d699d903773bb84bf7f0bc6a891; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 4f47292f488fa7041284dca1f1244116c18721f1; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < 96d4c2ee18d732a248d053aae8c4a27cb1d68d1c; >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c, < ac2140449184a26eac99585b7f69814bd3ba8f2d |
| Linux | Linux | 4.15 |
References
- https://git.kernel.org/stable/c/180280f3c4621d699d903773bb84bf7f0bc6a891
- https://git.kernel.org/stable/c/360eebfdd0ac5acd45a5fb888c2caecf19093b3f
- https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1Patch
- https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1cPatch
- https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2dPatch
Timeline
- Published
- Oct 21, 2024
- Last modified
- Oct 30, 2026
- NVD status
- Modified