kern/127699: Fatal trap 12: page fault while in kernel mode

[Wouter Snels]

>Number:         127699
>Category:       kern
>Synopsis:       Fatal trap 12: page fault while in kernel mode
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 28 14:30:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Wouter Snels
>Release:        7.0-RELEASE-p4
>Organization:
>Environment:
FreeBSD spark.ofloo.net 7.0-RELEASE-p4 FreeBSD 7.0-RELEASE-p4 #1: Sat Sep  6 19:20:57 CEST 2008     ofloo at spark.ofloo.net:/usr/obj/usr/src/sys/OFL  i386

>Description:
Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 01
fault virtual address   = 0x4c
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc083b4ac
stack pointer           = 0x28:0xe8d14790
frame pointer           = 0x28:0xe8d14800
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         = 2917 (irssi)
trap number             = 12
panic: page fault
cpuid = 2
Uptime: 1d1h1m11s
Physical memory: 2035 MB
Dumping 224 MB: 209 193
** DUMP FAILED (ERROR 60) **
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
cpu_reset: Stopping other CPUs
/boot/kernel/kernel text=0x70c230 data=0xae13c+0x5f424 syms=[0x4+0x71010+0x4+0x91b89]
>How-To-Repeat:
I been having this problem ever since I've started using FreeBSD5 with smp to 6,7, .. the only time i was able to recreate it was while running a connection over IPv6 on sshd authenticated with certificates, then flood the screen or buildworld or something, so a lot of data comes over the terminal screen, though this time it just randomly occurred, as it often does, i just did a fresh install few days ago, because the previous system had this problem every 30mins, it started out with once a month, once every 10 days, .. up until the point i booted up and just crashed instantly, currently i see the process seems to be irssi, usually when I see it on the screen it's sshd.

I use IPv6 through stf interface (6to4), in case it matters.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: