{
  "finding_id": "DF-4627",
  "poc_id": "DF-4627",
  "status": "untested",
  "reproduced": 0,
  "impact": "Display subsystem hang + CPU burn up to ~71.6 min per delay element, indefinitely across elements, holding KMS locks so all DRM clients block",
  "confidence": "certain",
  "attempts": 0,
  "guest_uname": null,
  "code_hash": null,
  "exploit_chain": [],
  "evidence": "VBT-controlled u32 delay becomes a kernel BUSY-WAIT because the DF shims usleep_range is DELAY(min). Cap-500ms + sleep-in-steps fix.",
  "kernel_refs": [
    "sys/dev/drm/i915/intel_dsi_vbt.c:194",
    "sys/dev/drm/i915/intel_dsi_vbt.c:198"
  ],
  "verdict": "not_run: no Intel GPU on guest; u32 -> DELAY(min) busy-wait is code-proven (delay.h:47-51)",
  "fix_status": "not_testable",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "not_testable: hardware-gated (no Intel DSI panel / no mpt HBA on guest)",
  "fix_evidence": "fix in finding markdown"
}