CVE-2026-43369

In the Linux kernel, the following vulnerability has been resolved:

drm/amd: Fix NULL pointer dereference in device cleanup

When GPU initialization fails due to an unsupported HW block IP blocks may have a NULL version pointer. During cleanup in amdgpudevicefinihw, the code calls amdgpudevicesetpgstate and amdgpudevicesetcgstate which iterate over all IP blocks and access adev->ipblocks[i].version without NULL checks, leading to a kernel NULL pointer dereference.

Add NULL checks for adev->ipblocks[i].version in both amdgpudevicesetcgstate and amdgpudevicesetpg_state to prevent dereferencing NULL pointers during GPU teardown when initialization has failed.

(cherry picked from commit b7ac77468cda92eecae560b05f62f997a12fe2f2)