CVE-2023-52912 drm/amdgpu: Fixed bug on error when unloading amdgpu

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fixed bug on error when unloading amdgpu Fixed bug on error when unloading amdgpu. The error message is as follows: 377.706202 kernel BUG at drivers/gpu/drm/drmbuddy.c:278! 377.706215 invalid opcode: 0000 1 PREEMPT SM...