CVE-2024-27041: drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini() Since 'adev->dm.dc' in amdgpu_dm_fini() might turn out to be NULL before the call to dc_enable_dmub_notifications(), check beforehand to ensure there will not be a possible NULL-ptr-deref there. Also, since commit 1e88eb1b2c25 ("drm/amd/display: Drop CONFIG_DRM_AMD_DC_HDCP") there are two separate checks for NULL in 'adev->dm.dc' before dc_deinit_callbacks() and dc_dmub_srv_destroy(). Clean up by combining them all under one 'if'. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=6.1.115-1<=6.1.119-1 | 5.10.223-1 5.10.226-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b
- https://git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182c
- https://git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957
- https://git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811
- https://launchpad.net/bugs/cve/CVE-2024-27041
- https://git.kernel.org/linus/2a3cfb9a24a28da9cc13d2c525a76548865e182c
- https://security-tracker.debian.org/tracker/CVE-2024-27041
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27041
- https://nvd.nist.gov/vuln/detail/CVE-2024-27041
- https://ubuntu.com/security/CVE-2024-27041
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