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Date: Thu, 27 Sep 2007 19:27:52 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Ivan Voras <ivoras@freebsd.org>
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Cc: freebsd-net@freebsd.org
Subject: Re: Panic in rt_check
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Ivan Voras wrote:
> Hi,
> 
> I have a machine that panics almost daily in route.c, in rt_check(). 
> This panic has been reported by several users, including Marcel 
> Moolenaar for a machine in freebsd.org.
> 
> The problem is present in both 6-STABLE and 7-CURRENT, and apparently it 
> manifests on SMP machines, both i386 and AMD64.
> 
> The panic backtrace looks like this:
> 
> panic: mtx_lock() of destroyed mutex @ /usr/src/sys/net/route.c:1305

I've asked this before of others without getting an answer: is it 
possible that your gateway route is disappearing (e.g. router going 
offline, flaky switch, cable unplugged, etc)?  I have seen this panic 
(only) in that situation.

Kris