CVE-2024-49919: drm/amd/display: Add null check for head_pipe in dcn201_acquire_free_pipe_for_layer
First published: Mon Oct 21 2024(Updated: )
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)
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.10.14 | |
| Linux Linux kernel | >=6.11<6.11.3 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.119-1 | 6.11.10-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/390d757621f5f35d11a63ed7d9d3262ead240064
- https://git.kernel.org/stable/c/8a1b1655a490a492a5a6987254c935ecce4eb9de
- https://git.kernel.org/stable/c/f22f4754aaa47d8c59f166ba3042182859e5dff7
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49919
- https://nvd.nist.gov/vuln/detail/CVE-2024-49919
- https://launchpad.net/bugs/cve/CVE-2024-49919
- https://security-tracker.debian.org/tracker/CVE-2024-49919
- https://ubuntu.com/security/CVE-2024-49919
- https://git.kernel.org/linus/f22f4754aaa47d8c59f166ba3042182859e5dff7
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