From owner-freebsd-current@FreeBSD.ORG  Wed Aug 12 20:35:07 2009
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Date: Wed, 12 Aug 2009 20:30:39 +0000 (UTC)
From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
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To: Bruce Cran <bruce@cran.org.uk>
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Cc: FreeBSD current mailing list <current@freebsd.org>
Subject: Re: sctp panic in _mtx_lock_sleep when attempting to connect to a
 remote machine
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On Wed, 12 Aug 2009, Bruce Cran wrote:

Hi,

> I've found a way to reliably panic two machines running 8.0-BETA2.  It
> seems that there's a problem with SCTP connection requests being made
> at the same time as other network traffic.  The panic I see is:
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
>
> Stack trace:
>
> _mtx_lock_sleep
> sctp_lower_sosend
> sctp_sosend
> kern_sendit
> sendit
> sendto
> sycall
> Xfast_syscall

unfrotunately the most intersting info is missing but it's likely that
you are hitting this:
http://lists.freebsd.org/pipermail/svn-src-stable-other/2009-August/000023.html

I you update to latest HEAD or stable/8, can you still reproduce it?

/bz

-- 
Bjoern A. Zeeb                      The greatest risk is not taking one.