⬢ DragonFlyBSD Kernel Audit
DF-4460 / manifest.json
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{
  "finding_id": "DF-4460",
  "title": "drm_gem_create_mmap_offset_size commits the offset-hash + unr publication before drm_vma_offset_add() is known to succeed — failure leaves on_map=true, a leaked idx/hash slot, and a retry that returns success with no vma offset",
  "verdict": "inconclusive",
  "impact": "none",
  "confidence": "certain",
  "reproduce": {
    "build": "cd /usr/src/sys/dev/drm/drm && make obj && make   (patched; guest cc 8.3, -Werror, RC=0)",
    "run": "sh run.sh sys/dev/drm/drm_gem.c   (static proof of the committed-before-checked ordering)",
    "expected": "run.log: on_map=true at 583 precedes the drm_vma_offset_add return at 585-586; retry early-returns 0 at 573-574; only release-time cleanup exists (543)."
  },
  "kernel_refs": [
    "sys/dev/drm/drm_gem.c:573",
    "sys/dev/drm/drm_gem.c:576",
    "sys/dev/drm/drm_gem.c:583",
    "sys/dev/drm/drm_gem.c:585",
    "sys/dev/drm/drm_vma_manager.c:200"
  ],
  "artifacts": [
    "README.md", "VERDICT.md", "run.sh", "build.sh", "run.log",
    "build.log", "fix.diff", "manifest.json", "verdict.json", "env.txt"
  ]
}