From owner-freebsd-current  Wed Jan  7 14:11:14 1998
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To: Kevin Day <toasty@home.dragondata.com>
cc: ady@warpnet.ro (Penisoara Adrian), freebsd-current@FreeBSD.ORG,
        freebsd-questions@FreeBSD.ORG
Subject: Re: Fatal trap 12 & debugging info ?? 
In-reply-to: Your message of "Wed, 07 Jan 1998 14:19:25 CST."
             <199801072019.OAA18158@home.dragondata.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Wed, 07 Jan 1998 14:07:00 -0800
Sender: owner-freebsd-current@FreeBSD.ORG
X-Loop: FreeBSD.org
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>>  For quite a while I'm bugged by sudden panics/reboots (all of them are
>> 'fatal trap 12'); here it is the last one I had (hand rewritten):
>> 
>> ============================================================
>> 
>> Fatal trap 12: page fault while in kernel mode
>> mp_lock = 00000002; cpuid = 0; lapic.id = 00000000
>> fault virtual address   = 0x0
>> fault code              = supervisor read, page not present
>> instruction pointer     = 0x8:0xf01a9273
>> stack pointer           = 0x10:0xf49cbe48
>> frame pointer           = 0x10:0xf49cbe54
>> 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         = 1594 (cron)
>> interrupt mask          = net tty bio cam  <- SMP:XXX
>> trap number             = 12
>> panic: page fault
>> mp_lock = 00000002; cpuid = 0; lapic.id = 00000000
>> boot called on cpu#0
>> 
>> syncing disks...
>> 
>
>I've had about 5 panics about exactly the same....
>
>A trace shows free, execve, syscall, xsyscall then the debugger locks up
>before showing any more...

   There was a bug in execve() that was fixed recently that would have
looked like this. You need rev 1.70 or newer of /sys/kern/kern_exec.c.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project