From owner-freebsd-bugs@FreeBSD.ORG  Wed Dec 21 22:42:33 2005
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Date: Wed, 21 Dec 2005 17:42:38 -0500
From: Parv <parv@pair.com>
To: Mike <mike.unixway@tversu.ru>
Message-ID: <20051221224238.GA41451@holestein.holy.cow>
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References: <43A9C2D6.9000508@tversu.ru>
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Cc: freebsd-bugs@FreeBSD.org
Subject: Re: Ipfilter and kernel panic
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in message <43A9C2D6.9000508@tversu.ru>,
wrote Mike thusly...
>
> I have encountered a strange problem in FreeBSD 5.4 - kernel panic
> when it(kernel)  is compiled with IPFilter. I think so, because
> with kernel ipfw this machine works quite well. Panic ususlly
> occurs after booting and starting all services.  What can it be?
> Here is the of panic message:
> "Fatal trap 12: page fault while in kernel mode
> fault virtual address: 0xc
> fault code: supervisor read, page not present
> 
> current process = 27 (swi1: net)
> trap number = 12
> panic: page fault"
...

A data point, i have been using ipfilter from 4.x to
5.x w/o any panic.

You will need to provide more info like backtrace for others to be
able to help you.  Search the mail archive and the FreeBSD
handbook(s) on how to produce the backtrace & other debugging
information ...

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
  http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html


  - Parv

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