CVE-2024-49916: drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn401_init_hw
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn401_init_hw This commit addresses a potential null pointer dereference issue in the `dcn401_init_hw` function. The issue could occur when `dc->clk_mgr` or `dc->clk_mgr->funcs` is null. The fix adds a check to ensure `dc->clk_mgr` and `dc->clk_mgr->funcs` is not null before accessing its functions. This prevents a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn401/dcn401_hwseq.c:416 dcn401_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 225)
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.11.3 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.119-1 | 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/4b6377f0e96085cbec96eb7f0b282430ccdd3d75
- https://git.kernel.org/stable/c/ac1c41e318074d8a9ea925787e366be15d7645e8
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49916
- https://nvd.nist.gov/vuln/detail/CVE-2024-49916
- https://launchpad.net/bugs/cve/CVE-2024-49916
- https://security-tracker.debian.org/tracker/CVE-2024-49916
- https://ubuntu.com/security/CVE-2024-49916
- https://git.kernel.org/linus/4b6377f0e96085cbec96eb7f0b282430ccdd3d75
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