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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
81927e2808be5adace93c2012d45d6938d3a7aa0 to < cef0f2fe65ccee638e48fd5c1d590a3c0539acddaffected81927e2808be5adace93c2012d45d6938d3a7aa0 to < e040f1fbe9abae91b12b074cfc3bbb5367b79811affected81927e2808be5adace93c2012d45d6938d3a7aa0 to < ca2eb375db76fd50f31afdd67d6ca4f833254957affected81927e2808be5adace93c2012d45d6938d3a7aa0 to < 1c62697e4086de988b31124fb8c79c244ea05f2baffected81927e2808be5adace93c2012d45d6938d3a7aa0 to < 2a3cfb9a24a28da9cc13d2c525a76548865e182caffected
Linux Linux
Default version status: affected
5.14affected0 to < 5.14unaffected6.1.191 to ≤ 6.1.*unaffected6.6.23 to ≤ 6.6.*unaffected6.7.11 to ≤ 6.7.*unaffected6.8.2 to ≤ 6.8.*unaffected6.9 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/cef0f2fe65ccee638e48fd5c1d590a3c0539acdd ↗
- 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 ↗