netdev - Re: Yet another bridge netfilter crash

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Date:	Wed, 04 Aug 2010 18:50:50 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	Stephen Hemminger <shemminger@...tta.com>, netdev@...r.kernel.org
Subject: Re: Yet another bridge netfilter crash

Am 04.08.2010 18:41, schrieb Herbert Xu:
> On Wed, Aug 04, 2010 at 06:30:58PM +0200, Patrick McHardy wrote:
>>
>> We could perform a new device lookup on reassembly as we do
>> when expiring a fragment queue, but we probably shouldn't even
>> be reassembling fragments from different bridges. One way to
>> avoid this would be to automatically assign each bridge device
>> to a different conntrack zone, but conntrack zones are limited
>> to 2^16 and this might also have other unwanted side-effects.
>>
>> Until we come up with something better the best fix seems to
>> be to perform the device lookup based on the iif.
> 
> I don't think we can as the iif will point to the bridge device.
> The physindev contains the original physical device where the
> packet came in.

If it originally points to the bridge device, there doesn't
seem anything wrong with the device pointing to the bridge
device after reassembly. Am I missing something?
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