netdev - Re: [PATCH] netfilter: fix a race in nf_ct_ext

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Message-ID: <4C925B24.8020900@trash.net>
Date:	Thu, 16 Sep 2010 20:00:04 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	paulmck@...ux.vnet.ibm.com
CC:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Netfilter Development Mailinglist 
	<netfilter-devel@...r.kernel.org>
Subject: Re: [PATCH] netfilter: fix a race in nf_ct_ext_create()

On 31.08.2010 17:51, Paul E. McKenney wrote:
> On Tue, Aug 31, 2010 at 05:48:02PM +0200, Eric Dumazet wrote:
>> > As soon as rcu_read_unlock() is called, there is no guarantee current
>> > thread can safely derefence t pointer, rcu protected.
>> > 
>> > Fix is to copy t->alloc_size in a temporary variable.
> Yow!!!  Good catch!!!
> 
> Reviewed-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> 
>> > Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks.
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