{
 "finding_id": "DF-3020",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "speculative",
 "verdict": "Two attempts to force getnewvnode failure inside the ptmx clone path: (1) kern.maxvnodes=300 with 217,405 open/close cycles - zero failures, vnlru kept recycling; (2) kern.maxvnodes=120 while holding 1,001 ptmx fds open - further opens fail with ENODEV from the pty driver unit limit (bitmap exhausted near 1000 units), which fires inside the clone handler BEFORE devfs_allocv, so the ignored-error path is never reached. The NULL-deref code path is real (devfs_allocv can return error leaving *vpp NULL; devfs_vop_nlookupdotdot:535 and devfs_spec_open:933 ignore the return) but getnewvnode could not be made to fail from unprivileged pressure on this guest.",
 "exploit_chain": "",
 "evidence": "VERDICT.md + run.log + sources",
 "kernel_refs": [
  "sys/vfs/devfs/devfs_vnops.c:535",
  "sys/vfs/devfs/devfs_vnops.c:933",
  "sys/vfs/devfs/devfs_core.c:328"
 ],
 "poc_changes": "adjusted from finding sketch to guest syscall/layout reality",
 "attempts": 2,
 "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": 60,
 "guest_dirty": 0,
 "build_cmd": "guest: cc -O2 -o <bin> <src>.c -pthread",
 "run_cmd": "see README.md",
 "code_hash": "758302c47ede0b6869ce6aedf0208c086f567d7ab460b2ae24c7f649d95dc30e",
 "notes": "fix_status: not_testable (not reproduced)",
 "recommended_fix": "diff: check devfs_allocv return in devfs_vop_nlookupdotdot (bail ENOENT) and in devfs_spec_open clone path (treat as failed clone, vput orig).\n"
}