NFS panic

Hey,

SVN as of a few days ago.  On reboot.  Do not have a core or further debugging information.
The machine was running of a nfs root.

May 26 17:10:06 panic: mtx_lock() of destroyed mutex _at_ /zoo/bz/HEAD.svn/sys/kern/uipc_socket.c:1025
cpuid = 5
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
kdb_backtrace() at kdb_backtrace+0x37
panic() at panic+0x1d8
_mtx_lock_flags() at _mtx_lock_flags+0x13f
sosend_dgram() at sosend_dgram+0xbb
sosend() at sosend+0x82
clnt_dg_call() at clnt_dg_call+0xb81
clnt_call_private() at clnt_call_private+0xe8
nlm4_unlock_4() at nlm4_unlock_4+0x45
nlm_clearlock() at nlm_clearlock+0x294
nlm_advlock_internal() at nlm_advlock_internal+0x64f
nlm_advlock() at nlm_advlock+0x2a
nfs_advlock() at nfs_advlock+0x130
VOP_ADVLOCK_APV() at VOP_ADVLOCK_APV+0xb7
vn_closefile() at vn_closefile+0xea
_fdrop() at _fdrop+0x23
closef() at closef+0x5c
fdfree() at fdfree+0x1b4
exit1() at exit1+0x319
sigexit() at sigexit+0x8f
cursig() at cursig
ast() at ast+0x1b9
doreti_ast() at doreti_ast+0x1f
KDB: enter: panic
[ thread pid 1475 tid 100121 ]
Stopped at      kdb_enter+0x3b: movq    $0,0x864762(%rip)

-- 
Bjoern A. Zeeb                                 You have to have visions!
   It does not matter how good you are. It matters what good you do!