⬢ DragonFlyBSD Kernel Audit
DF-3013 / verdict.json
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{
 "finding_id": "DF-3013",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "speculative",
 "verdict": "90-second hammer stress on a fresh HAMMER1 volume: 4 writer threads (create/write/fsync/unlink, 130,347 ops) racing 4 readdir threads with 5 concurrent hammer reblock+prune passes. No panic; clean unmount. The EDEADLK-during-reseek window is real in the code (hammer_object.c:1493 KKASSERT(error==0) after _hammer_ip_seek_btree) but was not crossed under this load on a 6-vCPU INVARIANTS guest.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/hammer/hammer_object.c:1493",
  "sys/vfs/hammer/hammer_btree.c:869",
  "sys/vfs/hammer/hammer_object.c:1568"
 ],
 "poc_changes": "adjusted from finding sketch to guest syscall/layout reality",
 "attempts": 1,
 "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64",
 "runtime_sec": 100,
 "guest_dirty": 0,
 "build_cmd": "guest: cc -O2 -o <bin> <src>.c -pthread",
 "run_cmd": "see README.md",
 "code_hash": "1428fe6c1527d1c16da5c0171864281580d27741ac3f1f216f0daea3fda5b938",
 "notes": "fix_status: not_testable (not reproduced)",
 "recommended_fix": "diff: handle EDEADLK in _hammer_ip_reseek (leave HAMMER_CURSOR_DISKEOF|ATEDISK cleared, propagate error to hammer_ip_next callers retry protocol) mirroring hammer_ip_first (:1568-1570).\n"
}