{
 "finding_id": "DF-3021",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "likely",
 "verdict": "Not exercised: triggering needs a device destroyed under an open fd (root-mediated revoke/driver detach), then fstat(fd) racing the detach. Line-verified: devfs_fo_stat calls vn_stat (guarded getattr) then unconditionally executes sb->st_rdev = devid_from_dev(DEVFS_NODE(vp)->d_dev) at devfs_vnops.c:1432, while devfs_vop_getattr carries an explicit node==NULL EIO guard at :565. Certain-by-inspection NULL-deref window; unreachable without a root-triggered destroy race on this rig.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/devfs/devfs_vnops.c:1432",
  "sys/vfs/devfs/devfs_vnops.c:565"
 ],
 "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: cache node = DEVFS_NODE(vp) once at fo_stat entry and return EIO when NULL (mirroring getattr), or hold vp locked across the stat critical section.\n"
}