RELENG_7 crash

[Mike Tancsa]

The box has a fairly heavy UDP load.  Its RELENG_7 as of today and 
took 3hrs for it to dump core.

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x68
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0637146
stack pointer           = 0x28:0xe766eaac
frame pointer           = 0x28:0xe766eb54
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 761 (bsnmpd)
trap number             = 12
panic: page fault
cpuid = 1
Uptime: 3h47m43s
Physical memory: 2036 MB
Dumping 83 MB: 68 52 36 20 4

(kgdb) bt
#0  doadump () at pcpu.h:196
#1  0xc05964d7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2  0xc05967a9 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:574
#3  0xc07f64ac in trap_fatal (frame=0xe766ea6c, eva=104) at 
/usr/src/sys/i386/i386/trap.c:939
#4  0xc07f6730 in trap_pfault (frame=0xe766ea6c, usermode=0, eva=104) 
at /usr/src/sys/i386/i386/trap.c:852
#5  0xc07f70dc in trap (frame=0xe766ea6c) at /usr/src/sys/i386/i386/trap.c:530
#6  0xc07db7eb in calltrap () at /usr/src/sys/i386/i386/exception.s:159
#7  0xc0637146 in sysctl_ifdata (oidp=0xc08816a0, arg1=0xe766ec24, 
arg2=2, req=0xe766eba4) at /usr/src/sys/net/if_mib.c:127
#8  0xc059fd77 in sysctl_root (oidp=Variable "oidp" is not available.
) at /usr/src/sys/kern/kern_sysctl.c:1413
#9  0xc059ff14 in userland_sysctl (td=0xc5374460, name=0xe766ec14, 
namelen=6, old=0x0, oldlenp=0xbfbf8478, inkernel=0, new=0x0,
     newlen=0, retval=0xe766ec10, flags=0) at 
/usr/src/sys/kern/kern_sysctl.c:1506
#10 0xc05a0064 in __sysctl (td=0xc5374460, uap=0xe766ecfc) at 
/usr/src/sys/kern/kern_sysctl.c:1443
#11 0xc07f6a85 in syscall (frame=0xe766ed38) at 
/usr/src/sys/i386/i386/trap.c:1090
#12 0xc07db850 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:255
#13 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)

--------------------------------------------------------------------
Mike Tancsa,                                      tel +1 519 651 3400
Sentex Communications,                            mike at sentex.net
Providing Internet since 1994                    www.sentex.net
Cambridge, Ontario Canada                         www.sentex.net/mike