kern/47512: netbsd-6 system crash

[htodd%twofifty.com@localhost]

>Number:         47512
>Category:       kern
>Synopsis:       netbsd-6 system crash
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jan 29 23:00:01 +0000 2013
>Originator:     Hisashi Todd Fujinaka
>Release:        NetBSD 6.0_STABLE
>Organization:
None
>Environment:
        
        
System: NetBSD chris.i8u.org 6.0_STABLE NetBSD 6.0_STABLE (CHRIS) #36: Sun Jan 
13 22:31:20 PST 2013 htodd@chris:/usr/obj/amd64/sys/arch/amd64/compile/CHRIS 
amd64
Architecture: x86_64
Machine: amd64
>Description:
"idle" server running tmux, irssi, apache24, sshd, sendmail, etc crashes from 
time to time. Crash shows:

Crash version 6.0_STABLE, image version 6.0_STABLE.
System panicked: lock error
Backtrace from time of crash is available.
crash> bt
_KERNEL_OPT_NARCNET() at 0
_KERNEL_OPT_NARCNET() at 0
vpanic() at vpanic+0x1dd
printf_nolog() at printf_nolog
lockdebug_abort() at lockdebug_abort+0x3a
rw_vector_enter() at rw_vector_enter+0x281
uvm_fault_internal() at uvm_fault_internal+0x142
trap() at trap+0x5a4
--- trap (number 6) ---
amap_copy() at amap_copy+0xaf
uvm_fault_internal() at uvm_fault_internal+0xd1f
trap() at trap+0x5a4
--- trap (number 6) ---
7f7ff609e2ec:
crash> p  trap+0x5a4

        
>How-To-Repeat:
reboot system and wait
        
>Fix:
yes please
        

>Unformatted: