netdev - Re: [PATCH 2/2] IPv6: conntrack: Use protocol-related match routine in IPv6 connection track

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Date:	Mon, 25 Jan 2010 23:35:45 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	shanwei@...fujitsu.com
Cc:	kaber@...sh.net, yasuyuki.kozakai@...hiba.co.jp,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] IPv6: conntrack: Use protocol-related match
 routine in IPv6 connection track

From: Shan Wei <shanwei@...fujitsu.com>
Date: Tue, 26 Jan 2010 10:31:16 +0800

> 
> IPv6 connection track and IPv6 stack separately use a different queue to 
> manage received fragments. So using protocol-related match routine.
> 
> 
> Signed-off-by: Shan Wei <shanwei@...fujitsu.com>

This problem was also introduced by:

commit 0b5ccb2ee250136dd7385b1c7da28417d0d4d32d
Author: Patrick McHardy <kaber@...sh.net>
Date:   Tue Dec 15 16:59:18 2009 +0100

    ipv6: reassembly: use seperate reassembly queues for conntrack and local delivery
    
    Currently the same reassembly queue might be used for packets reassembled
    by conntrack in different positions in the stack (PREROUTING/LOCAL_OUT),
    as well as local delivery. This can cause "packet jumps" when the fragment
    completing a reassembled packet is queued from a different position in the
    stack than the previous ones.
    
    Add a "user" identifier to the reassembly queue key to seperate the queues
    of each caller, similar to what we do for IPv4.
    
    Signed-off-by: Patrick McHardy <kaber@...sh.net>

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