DF-2994 run transcript (ssh, captured during verification)
guest: DragonFly dfbsd 6.5-DEVELOPMENT #0 X86_64_GENERIC (INVARIANTS)
exports:
  /tmp/nfsroot -maproot=root
  / -public -index=missing.html -maproot=root

$ /root/nfspoc null
NULL: reply 24 bytes in 0.0003s            <- server healthy
$ NFSPOC_SRCPORT=830 /root/nfspoc mount | tail -1
mountd port = 762
25ff63890b0000001400000003000000000000006347c84700000000

$ NFSPOC_SRCPORT=831 NFSPOC_TIMEOUT=5 /root/nfspoc lookup0 /
--- TRIGGER lookup0 public fh ---
(run_rc=124 — ssh session never completed; server panicked)

$ vm.sh status
down

serial console (see panic.txt):
  login: panic: lockmgr: LK_RELEASE: no lock held
  cpuid = 3
  Trace beginning at frame 0xfffff8011839b260
  lockmgr_release() at lockmgr_release+0x11a
  lockmgr_release() at lockmgr_release+0x11a
  vput() at vput+0x11
  nfsrv_lookup() at nfsrv_lookup+0x35b
  sys_nfssvc() at sys_nfssvc+0x40f
  syscall2() at syscall2+0x11e
  Debugger("panic")
  db>