Fatal Trap 12: page fault while in kernel mode

Kris Kennaway kris at obsecurity.org
Mon Sep 20 20:12:56 PDT 2004

On Mon, Sep 20, 2004 at 10:55:10PM -0400, Jonathan T. Sage wrote:
> Attempting to do hardware upgrades.  alas, since I dropped in a new
> motherboard / processor combo, I get (hand transposed):
> Fatal trap 12: page fault while in kernel mode
> fault virtual address	= 0x5e
> fault code		= supervisor write, page no present
> instruction pointer	= 0x8:0xc062d6e1
> stack pointer		= 0x10:0xe0f03b7c
> frame pointer		= 0x10:0xe0f03b7c
> 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		= 45 (syncer)
> trap number		= 12
> panic: page fault
> this is not a debug kernel.  In fact, this latest one occurred while I
> was attempting to build said debug kernel.  Single user mode, 5.x as of
> right around 5.3-BETA2 tag, may have been close to 5.3-BETA3.
> Any more info I can provide, gonna keep attempting to build the debug
> kernel, hope that one of these attempts it will finish before the panic
> (seems to be happening withing 15min of boot)
> I'm just totally dead in the water at this point..  ideas please?

Try a later beta, the early ones had a number of problems.  OTOH,
since you're playing with hardware you should also strongly suspect
that as the cause.

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