From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemminger@dslnorthwest.net>
Subject: Crash in ip_conntrack on shutdown
Date: Wed, 01 Nov 2006 16:56:35 -0800
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My desktop machine (Fedora Core 6) crashed on during shutdown when 
running latest
2.6.19-rc4 kernel. Machine is UP Amd64.

It looks like a null dereference in ip_conntrack. See screenshot.
  
http://picasaweb.google.com/stephen.hemminger/LinuxCrashes/photo#4992593950061821970