⬢ DragonFlyBSD Kernel Audit
DF-4589 / manifest.json
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{
  "finding_id": "DF-4589",
  "file": "sys/dev/drm/radeon/atombios_dp.c",
  "verdict": "not_reproduced",
  "impact": "none (hardware-gated; ceiling: unkillable task + display-subsystem DoS)",
  "reproduce": {
    "build": "guest: cc -Wall -Wextra -o trigger trigger.c (documented sink state machine; compiles clean on guest DragonFly)",
    "run": "./run.sh  [guest probe]; real trigger needs radeon GPU + crafted DP sink (trigger.c) + any modeset",
    "expected": "vulnerable: issuing task spins forever in radeon_dp_link_train_cr holding mode_config.mutex, unkillable, all DRM ioctls on the card block; patched: loop exits after 50 iterations with 'clock recovery exceeded max loop attempts' + 'clock recovery failed'"
  },
  "kernel_refs": [
    "sys/dev/drm/radeon/atombios_dp.c:684",
    "sys/dev/drm/radeon/atombios_dp.c:707",
    "sys/dev/drm/radeon/atombios_dp.c:713",
    "sys/dev/drm/radeon/atombios_dp.c:762",
    "sys/dev/drm/drm_dp_helper.c:121",
    "sys/dev/drm/radeon/atombios_encoders.c:1777"
  ],
  "artifacts": [
    "README.md", "VERDICT.md", "trigger.c", "run.sh", "run.log",
    "build.log", "env.txt", "guest_probe.log", "fix.diff",
    "manifest.json", "verdict.json"
  ]
}