{
  "finding_id": "DF-4186",
  "title": "radeon_device_init ignores radeon_doorbell_init() failure -> NULL doorbell aperture WDOORBELL32 write (panic) on CIK+ under ioremap failure",
  "verdict": "not_reproduced",
  "impact": "none",
  "reproduce": {
    "build": "n/a (requires CIK+ radeon hardware; audit guest has none)",
    "run": "n/a",
    "expected": "on CIK+ hw with BAR2 ioremap failure at load: NULL-page write panic in cik_compute_set_wptr during radeon_ib_ring_tests"
  },
  "kernel_refs": ["sys/dev/drm/radeon/radeon_device.c:1422", "sys/dev/drm/radeon/radeon_device.c:330", "sys/dev/drm/radeon/radeon_device.c:374", "sys/dev/drm/radeon/cik.c:4207"],
  "artifacts": ["README.md", "VERDICT.md", "fix.diff", "verdict.json", "manifest.json"]
}