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Change History

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()

kernel.org https://git.kernel.org/stable/c/1c62697e4086de988b31124fb8c79c244ea05f2b [No types assigned]

kernel.org https://git.kernel.org/stable/c/2a3cfb9a24a28da9cc13d2c525a76548865e182c [No types assigned]

kernel.org https://git.kernel.org/stable/c/ca2eb375db76fd50f31afdd67d6ca4f833254957 [No types assigned]

kernel.org https://git.kernel.org/stable/c/e040f1fbe9abae91b12b074cfc3bbb5367b79811 [No types assigned]