{
 "finding_id": "DF-3041",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "likely",
 "verdict": "Not reproduced (race window is the few instructions between brelse at hammer_ondisk.c:251 and the two vol0_stat_bigblocks loads at :254/:257; forcing buffer recycling exactly there requires concurrent raw-device I/O on the same devvp during a mount, and even then only statfs accounting bytes change). Line-verified: bp released and NULLed at :251-252, then ondisk->vol0_stat_bigblocks read twice through the stale pointer captured at :183, added (x512) into f_blocks. Fix is a two-line move.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/hammer/hammer_ondisk.c:251",
  "sys/vfs/hammer/hammer_ondisk.c:254",
  "sys/vfs/hammer/hammer_ondisk.c:257"
 ],
 "poc_changes": "none",
 "attempts": 0,
 "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": 0,
 "guest_dirty": 0,
 "build_cmd": "",
 "run_cmd": "see README.md",
 "code_hash": null,
 "notes": "fix_status: not_testable (not reproduced)",
 "recommended_fix": "diff --git a/sys/vfs/hammer/hammer_ondisk.c: move the two f_blocks updates above the brelse at :251.\n"
}