== DF-4262 ==
DF-4262: no DRI device node available (errno=2/No such file or directory).
On a system with amdgpu hardware this ioctl panics the kernel:
  amdgpu_cs.c:114 num_chunks==0 -> early success; amdgpu_cs.c:1048 parser->entity==NULL -> load from 0x10
rc=1
== DF-4263 ==
DF-4263: cannot open /dev/dri/renderD128: No such file or directory
On amdgpu hw each CS below permanently leaks 64 BO refs + one bo_list (amdgpu_cs.c:88-89 overwrite).
rc=1
== DF-4264 ==
DF-4264: cannot open /dev/dri/renderD128: No such file or directory
On amdgpu hw each FENCE_TO_HANDLE call below leaks one dma_fence reference (amdgpu_cs.c:1427 vs :1468).
rc=1
== DF-4265 ==
DF-4265: cannot open /dev/dri/renderD128: No such file or directory
On amdgpu hw: 33 GFX submissions then WAIT_FENCES(all) on seq 1 races the RCU fence free against the fence->error read at amdgpu_cs.c:1508.
rc=1