CVE-2024-27041
drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
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drm/amd/display: fix NULL checks for adev->dm.dc in amdgpu_dm_fini()
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.
Reserved 2024-02-19 | Published 2024-05-01 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/e040f1fbe9abae91b12b074cfc3bbb5367b79811
git.kernel.org/...c/ca2eb375db76fd50f31afdd67d6ca4f833254957
git.kernel.org/...c/1c62697e4086de988b31124fb8c79c244ea05f2b
git.kernel.org/...c/2a3cfb9a24a28da9cc13d2c525a76548865e182c
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