mtx_lock() of destroyed mutex on NFS

Hi,

as a result of a make buildkernel && make installkernel && reboot all on NFS I got this with a HEAD SVN source at r226465.  I cannot dump unfortunately and it seems I just killed the obj tree for this kernel though it should be very close.

Oct 18 10:03:22 lion3 reboot: rebooted by test
Oct 18 10:03:22 panic: mtx_lock() of destroyed mutex _at_ /zoo/bz/HEAD.svn/sys/kern/uipc_socket.c:1022
cpuid = 2
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
kdb_backtrace() at kdb_backtrace+0x37
panic() at panic+0x187
_mtx_lock_flags() at _mtx_lock_flags+0x130
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
nlm_get_rpc() at nlm_get_rpc+0x187
nlm_host_get_rpc() at nlm_host_get_rpc+0x130
nlm_clearlock() at nlm_clearlock+0x10a
nlm_advlock_internal() at nlm_advlock_internal+0x64f
nlm_advlock() at nlm_advlock+0x2a
nfs_advlock() at nfs_advlock+0x122
VOP_ADVLOCK_APV() at VOP_ADVLOCK_APV+0xb7
vn_closefile() at vn_closefile+0xe8
_fdrop() at _fdrop+0x23
closef() at closef+0x5c
fdfree() at fdfree+0x1b4
exit1() at exit1+0x31a
sigexit() at sigexit+0x8f
cursig() at cursig
ast() at ast+0x1a9
doreti_ast() at doreti_ast+0x1f
KDB: enter: panic
[ thread pid 1652 tid 100106 ]
Stopped at      kdb_enter+0x3b: movq    $0,0x80feb2(%rip)
db> show reg
cs                0x20
ds                0x3b
es            0x3b003b
fs            0x1b0013
gs                0x1b
ss                0x28
rax               0x12
rcx         0xfffffe001a001000
rdx                  0
rbx         0xffffffff80a2bfa8  __func__.3464+0x111
rsp         0xffffff85cc173780
rbp         0xffffff85cc1737a0
rsi               0x80
rdi         0xffffff85cc173600
r8          0xffffffff80a2a498  __func__.6043+0x328
r9          0xffffff85cc1736b0
r10         0xfffffe001a001000
r11                0x1
r12                0x1
r13         0xfffffe001a001000
r14              0x3fe
r15         0xffffffff80a39948  __func__.7715+0x2d3
rip         0xffffffff80646c2b  kdb_enter+0x3b
rflags           0x282
kdb_enter+0x3b: movq    $0,0x80feb2(%rip)

-- 
Bjoern A. Zeeb                                 You have to have visions!
         Stop bit received. Insert coin for new address family.