{
 "finding_id": "DF-3090",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "likely",
 "verdict": "Line-verified confusion exercised as root with the guest hammer2 root mount: nfssvc(NFSSVC_MNTD, {\"/\"}) and nfssvc(NFSSVC_MNTD|NFSSVC_GOTAUTH, ...) both return 0 cleanly - the type-confused reads of hammer2 mount data through struct nfsmount field offsets happen (nmp = VFSTONFS(vp->v_mount) with only a VROOT check, nfs_syscalls.c:175-176), but the garbage field values route execution into benign early exits (the NFSSTA_MNTD early-return at :180 for the plain call; an authstr NULL path for GOTAUTH) on this filesystem layout. No crash, no observable disclosure, no wild write manifested. Missing vfstype validation is real; impact not demonstrable on this guest.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/nfs/nfs_syscalls.c:175",
  "sys/vfs/nfs/nfs_syscalls.c:180",
  "sys/vfs/nfs/nfs_kerb.c:70"
 ],
 "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": 10,
 "guest_dirty": 0,
 "build_cmd": "guest: cc -O2 -o <bin> <src>.c -pthread",
 "run_cmd": "see README.md",
 "code_hash": "1d96d02419879806292fe6c01c4fe9efdf2ae113c90ec1784428dac7ccbef9e4",
 "notes": "fix_status: not_testable (not reproduced)",
 "recommended_fix": "diff: validate vp->v_mount->mnt_vfc == &nfs_vfsconf (or equivalent type check) before the VFSTONFS cast, else EINVAL.\n"
}