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)
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 < 360eebfdd0ac5acd45a5fb888c2caecf19093b3faffected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 180280f3c4621d699d903773bb84bf7f0bc6a891affected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 4f47292f488fa7041284dca1f1244116c18721f1affected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < 96d4c2ee18d732a248d053aae8c4a27cb1d68d1caffected4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c to < ac2140449184a26eac99585b7f69814bd3ba8f2daffected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 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/360eebfdd0ac5acd45a5fb888c2caecf19093b3f ↗
- https://git.kernel.org/stable/c/180280f3c4621d699d903773bb84bf7f0bc6a891 ↗
- https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1 ↗
- https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1c ↗
- https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2d ↗