netdev - Re: Yet another bridge netfilter crash

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Message-ID: <20100804164119.GA6256@gondor.apana.org.au>
Date:	Thu, 5 Aug 2010 00:41:19 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	Stephen Hemminger <shemminger@...tta.com>, netdev@...r.kernel.org
Subject: Re: Yet another bridge netfilter crash

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.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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