drm/amdkfd: Fix NULL Pointer Dereference in KFD queue
In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: Fix NULL Pointer Dereference in KFD queue

Through KFD IOCTL Fuzzing we encountered a NULL pointer derefrence
when calling kfd_queue_acquire_buffers.

(cherry picked from commit 049e5bf3c8406f87c3d8e1958e0a16804fa1d530)