DF-4914: injected failed-init state (radeon_fb.c:374-405):
  rdev->mode_info.rfbdev = 0xfffff8011788c900 — kfree()d block still recorded (dangling)
DF-4914: calling production radeon_fbdev_fini() (radeon_modeset_fini teardown) on the dangling pointer...
panic: memory chunk 0xfffff8011788c900 is already free!
cpuid = 5
Trace beginning at frame 0xfffff801182e76b8
chunk_mark_free() at chunk_mark_free+0xae 0xffffffff80655dbe 
chunk_mark_free() at chunk_mark_free+0xae 0xffffffff80655dbe 
_kfree() at _kfree+0x262 0xffffffff806580e2 
radeon_fbdev_fini() at radeon_fbdev_fini+0x78 0xffffffff831feae8 
sysctl_run() at sysctl_run+0x1c4 0xffffffff84bcb334 
sysctl_root.isra.5() at sysctl_root.isra.5+0x166 0xffffffff80683d06 
Debugger("panic")

CPU5 stopping CPUs: 0x0000001f
 stopped