netdev - Re: 3.0: unexpected route cache entry for wrong segment?

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Message-Id: <20120228.140740.2121187297378484175.davem@davemloft.net>
Date:	Tue, 28 Feb 2012 14:07:40 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	mjt@....msk.ru
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: 3.0: unexpected route cache entry for wrong segment?

From: Michael Tokarev <mjt@....msk.ru>
Date: Tue, 28 Feb 2012 15:38:36 +0400

> On 15.02.2012 17:03, Eric Dumazet wrote:
>> Le mercredi 15 février 2012 à 16:57 +0400, Michael Tokarev a écrit :
>> 
>>> 3.0.21 included "net: fix NULL dereferences in check_peer_redir()" patch
>>> (which is somewhat large(ish) - I wonder why it has been rolled into
>>> single patch while in reality it consists of 7 commits; and I wonder
>>> why the final result is different from current version in check_peer_redir()
>>> routine, which I mentioned in my other email in this thread), but that
>>> one does not seem to address this very issue - from a quick view anyway.
>> 
>> That was the tricky part handled by David.
>> 
>> We couldnt apply all needed commits without bringing too many things
>> from recent kernels to 3.0  (out of stable scope)
>> 
>> If you believe a fix is needed, just shout :)
> 
> I think the a fix is needed.  I still don't understand where our
> unexpected redirects are coming from, but we had two more occurences
> of this very issue.  After applying the two patches:
> 
> 7cc9150ebe8ec06cafea9f1c10d92ddacf88d8ae route: fix ICMP redirect validation
> 9cc20b268a5a14f5e57b8ad405a83513ab0d78dc ipv4: fix redirect handling

If you were paying attention, you'd see that both of these patches are
in Greg's stable queue already.
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