netdev - Re: Possible netfilter-related memory corruption in 2.6.37

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Message-ID: <4D595DBD.3090005@trash.net>
Date:	Mon, 14 Feb 2011 17:52:13 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Jan Engelhardt <jengelh@...ozas.de>, Avi Kivity <avi@...hat.com>,
	netfilter-devel@...r.kernel.org,
	Marcelo Tosatti <mtosatti@...hat.com>,
	nicolas prochazka <prochazka.nicolas@...il.com>,
	KVM list <kvm@...r.kernel.org>, netdev <netdev@...r.kernel.org>
Subject: Re: Possible netfilter-related memory corruption in 2.6.37

Am 14.02.2011 17:48, schrieb Eric Dumazet:
> Le lundi 14 février 2011 à 17:37 +0100, Patrick McHardy a écrit :
>> Am 14.02.2011 17:29, schrieb Eric Dumazet:
>>> Le lundi 14 février 2011 à 17:24 +0100, Patrick McHardy a écrit :
>>>>> Also, I wonder if RCU rules are respected in nf_iterate().
>>>>> For example this line is really suspicious :
>>>>>
>>>>> *i = (*i)->prev;
>>>>
>>>> Yeah, that definitely looks wrong. How about this instead?
>>>>
>>>
>>> This patch seems fine to me, thanks !
>>>
>>> Acked-by: Eric Dumazet <eric.dumazet@...il.com>
>>
>> THanks Eric, I've queued the patch for 2.6.38.
> 
> I am not sure, but I guess nf_reinject() needs a fix too ;)

I agree. That one looks uglier though, I guess we'll have to
iterate through all hooks to note the previous one.

I'll take care of that once Dave has pulled the last fix
since I already sent out the pull request.
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