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Date:      Sun, 9 Jun 2002 23:08:08 -0700 (PDT)
From:      Oliver Crow <ocrow@simplexity.net>
To:        freebsd-stable@FreeBSD.ORG
Cc:        Mike Nowlin <mike@argos.org>, Archie Cobbs <archie@dellroad.org>, <freebsd-net@FreeBSD.ORG>
Subject:   Re: Clockwork 24 hour crash in 4.5-RELEASE-p5
Message-ID:  <20020609224325.T17826-100000@iguana.simplexity.net>
In-Reply-To: <20020603192117.E79925-100000@iguana.simplexity.net>

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Archie Cobbs (the mpd maintainer) took a look at one of the crash dumps,
and concluded that the address list hanging off of the loopback interface
(lo0) was corrupted, hence the crash.

Recompiling the kernel without IPv6 support seems to prevent the crashes
(ie comment out 'options INET6' in kernel config).  It is not clear what
precisely the problem is, but it seems likely that it's an interaction
between mpd and IPv6.  Disabling either one appears to be a sufficent
workaround to prevent the crashes.

If anyone who knows the IPv6 code is interested in looking at the crash
dumps, I'll be happy to arrange.  Thanks to everone for helping out with
this, especially Mike and Archie.

Oliver


> > On Sat, Jun 01, 2002 at 08:37:21PM -0700, Oliver Crow wrote:
> >
> > I have a FreeBSD 4.5-p5 system that's crashing reliably every 24 hours
> > +/- a few minutes.  It's been doing this ever since I compiled a
> > 4.5-p4 kernel on March 25th.  I cvsup'd to 4.5-p5 and recompiled, but
> > it's still crashing.




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