Date: Mon, 6 Nov 2006 14:40:31 GMT From: Ruslan Ermilov <ru@FreeBSD.org> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/105208: Fatal trap 12: page fault while in kernel mode on mail gateway running Exim and Spamassassin Message-ID: <200611061440.kA6EeVsc038715@freefall.freebsd.org>
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The following reply was made to PR kern/105208; it has been noted by GNATS.
From: Ruslan Ermilov <ru@FreeBSD.org>
To: Jonathan Hall <jdhall@glam.ac.uk>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/105208: Fatal trap 12: page fault while in kernel mode on mail gateway running Exim and Spamassassin
Date: Mon, 6 Nov 2006 17:36:08 +0300
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Jonathan,
On Mon, Nov 06, 2006 at 12:37:23PM +0000, Jonathan Hall wrote:
> Crash message from GENERIC kernel:-
>=20
> Fatal trap 12: page fault while in kernel mode
> fault virtual address =3D 0x5c
> fault code =3D supervisor read, page not present
> instruction pointer =3D 0x20:0xc06ea3a8
> stack pointer =3D 0x28:0xe8d7ab10
> frame pointer =3D 0x28:0xe8d7ab2c
> 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 81192 (exim-4.63-3)
> trap number =3D 12
> panic: page fault
> Uptime: 10d0h3m56s
> Cannot dump. No dump device defined.
> Automatic reboot in 15 seconds - press a key on the console to abort
>=20
This looks pretty much like a null pointer dereference.
Two things to do for you:
1) Please check that the problem is still there with a more
recent version of OS, by upgrading to the top of RELENG_6,
because it can be that it's been already found and fixed.
2) If above isn't possible, or doesn't fix the problem, please
get yourself familiar with the kernel debugging, and provide
a useful stack trace that developers can use to try to diagnose
the problem:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kernel=
debug.html
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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