From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: oops in udpv6_sendmsg
Date: Mon, 01 Apr 2013 18:23:59 -0700
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References: <20130329184006.GA23893@redhat.com>
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To: Dave Jones <davej@redhat.com>
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On Fri, 2013-03-29 at 11:49 -0700, Eric Dumazet wrote:
> On Fri, 2013-03-29 at 14:40 -0400, Dave Jones wrote:
> > Just hit this on Linus' current tree.
> > 
> > BUG: unable to handle kernel NULL pointer dereference at 0000000000000031
> > IP: [<ffffffff8166ca6b>] udpv6_sendmsg+0x34b/0xa90
> > 
> > Looks like the last line of an inlined __ip6_dst_store() call. So line 1243 of net/ipv6/udp.c
> > 
> > 	Dave
> 
> Yes, I had the same problem on my lab machine yesterday and was working
> on it (Using a linux-3.3.8 code base)
> 
> In my case, the invalid rt6i_node value was 0x66b579de

I am mystified by this problem, I could not reproduce it...

Hmm...