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THREATINT
PUBLISHED

CVE-2024-27041

drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()

Reserved:2024-02-19
Published:2024-05-01
Updated:2024-05-13

Description

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.

Product status

Default status
unaffected

81927e2808be before e040f1fbe9ab
affected

81927e2808be before ca2eb375db76
affected

81927e2808be before 1c62697e4086
affected

81927e2808be before 2a3cfb9a24a2
affected

Default status
affected

5.14
affected

Any version before 5.14
unaffected

6.6.23
unaffected

6.7.11
unaffected

6.8.2
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811

https://git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957

https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b

https://git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182c

cve.org CVE-2024-27041

nvd.nist.gov CVE-2024-27041

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