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From: Nick Sayer <nsayer@kfu.com>
To: Pekka Savola <pekkas@netcore.fi>
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Date: Tue, 13 May 2008 06:49:05 -0700
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	Tue, 13 May 2008 06:49:08 -0700 (PDT)
Cc: freebsd-bugs@FreeBSD.org
Subject: Re: kern/122283: [ip6] [panic] Panic in ip_output related to IPv6
	routes
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I too have an SMP machine - a core 2 duo.

I rather suspect that the bug is elsewhere - something is pooching the  
route table, then this code is stumbling over the results.

On May 13, 2008, at 3:42 AM, Pekka Savola wrote:

> Hi Nick,
>
> I got hit by this after upgrading a dual-CPU system (6to4 relay)  
> from 6.3 to 7.0.  At the same time I enabled SMP.  I'm going to try  
> to disable SMP but I don't know if it helps.
>
> The backtrace seems somewhat similar, unfortunately I have less  
> information than you do:
>
> Tracing pid 12 tid 100003 td 0xc4d08880
> ip_output(c5434700,0,c5001804,0,0,...) at ip_output+0x15c
> stf_output(c4fd3c00,c5430a00,c08166c4,c51ced20,0,...) at stf_output 
> +0x431
> nd6_output(c4fd3c00,c4fd3c00,c5430a00,c08166c4,c51ced20,...) at  
> nd6_output+0x70d
> ip6_forward(c5430a00,0,10,1,0,...) at ip6_forward+0x88d
> ip6_input(c5430a00,c058019e,1,93472,c4d08880,...) at ip6_input+0xd7e
> netisr_processqueue(1,e0633985,202,1000000,c4d08880,...) at  
> netisr_processqueue+0xcd
> swi_net(0,0,c0788ef0,46b,0,...) at swi_net+0xbe
> ithread_loop(c4cc58f0,e529dd38,0,0,0,...) at ithread_loop+0x1ab
> fork_exit(c056d8e0,c4cc58f0,e529dd38) at fork_exit+0x99
> fork_trampoline() at fork_trampoline+0x8
>
> -- 
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings