Page fault in uipc_usrreq.c:997

During boot of GENERIC HEAD from Sep 7 07:29 UTC I got this page
fault:

Kernel page fault with the following non-sleepable locks held:
exclusive sleep mutex unp r = 0 (0xc0a5520c) locked _at_
kern/uipc_usrreq.c:987
KDB: stack backtrace:
kdb_backtrace(1,c410b000,c,c3f77a20,e43f7a28,...) at
kdb_backtrace+0x29
witness_warn(5,0,c0941302) at witness_warn+0x192
trap(8,28,c4190028,c413a7a8,c4195690,...) at trap+0x108
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc06e01e6, esp = 0xe43f7a70, ebp = 0xe43f7bfc ---
unp_connect(c41ce000,c3f797e0,c3f77a20,c0a5520c,0,...) at
unp_connect+0x292
uipc_connect(c41ce000,c3f797e0,c3f77a20) at uipc_connect+0x3e
soconnect(c41ce000,c3f797e0,c3f77a20) at soconnect+0x4e
kern_connect(c3f77a20,3,c3f797e0,c3f797e0,0,...) at kern_connect+0x76
connect(c3f77a20,e43f7d04) at connect+0x30
syscall(3b,3b,3b,1,8270000,...) at syscall+0x256

http://people.freebsd.org/~pho/stress/log/cons207.html.

The core file is toast and I missed a back trace of pid 678 :-(
-- 
Peter Holm