{
 "finding_id": "DF-3058",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "certain",
 "verdict": "Not executable on this rig: dirfs is dead code in the current tree - sys/vfs/dirfs/ has no Makefile, is not referenced by sys/conf/files, is in no kernel config, and kldload dirfs fails (module not built). mount_dirfs additionally refuses to run on non-vkernel platforms (sbin/mount_dirfs/mount_dirfs.c:105). The contract breach is code-certain from source: dirfs_vnops.c:588-595 computes error = fsync(dnp->dn_fd) twice (second call on failure stores -1, not errno) and then returns 0 unconditionally.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/dirfs/dirfs_vnops.c:588",
  "sys/vfs/dirfs/dirfs_vnops.c:595"
 ],
 "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: error = fsync(dnp->dn_fd); if (error) error = errno; ... return error (drop the second fsync call and the forced 0).\n"
}