CVE-2024-49918

Published: October 23, 2024Last modified: October 23, 2024

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)

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Status

References

• https://git.kernel.org/stable/c/4f47292f488fa7041284dca1f1244116c18721f1
• https://git.kernel.org/stable/c/96d4c2ee18d732a248d053aae8c4a27cb1d68d1c
• https://git.kernel.org/stable/c/ac2140449184a26eac99585b7f69814bd3ba8f2d