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Date:      Mon, 20 Sep 2004 20:13:04 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        "Jonathan T. Sage" <sagejona@theatre.msu.edu>
Cc:        FreeBSD Current Mail List <freebsd-current@freebsd.org>
Subject:   Re: Fatal Trap 12: page fault while in kernel mode
Message-ID:  <20040921031304.GB45435@xor.obsecurity.org>
In-Reply-To: <414F980E.2080700@theatre.msu.edu>
References:  <414F980E.2080700@theatre.msu.edu>

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On Mon, Sep 20, 2004 at 10:55:10PM -0400, Jonathan T. Sage wrote:
>=20
> Attempting to do hardware upgrades.  alas, since I dropped in a new
> motherboard / processor combo, I get (hand transposed):
>=20
> Fatal trap 12: page fault while in kernel mode
> fault virtual address	=3D 0x5e
> fault code		=3D supervisor write, page no present
> instruction pointer	=3D 0x8:0xc062d6e1
> stack pointer		=3D 0x10:0xe0f03b7c
> frame pointer		=3D 0x10:0xe0f03b7c
> code segment		=3D base 0x0, limit 0xfffff, type 0x1b
> 			=3D DPL 0, pres 1, def32 1, gran 1
> processor eflags	=3D interrupt enabled, resume, IOPL =3D 0
> current process		=3D 45 (syncer)
> trap number		=3D 12
> panic: page fault
>=20
> 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.
>=20
> 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)
>=20
> 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.

Kris
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