netdev - Re: netfilter 01/03: ctnetlink: fix conntrack creation race

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Message-Id: <20081124.160547.137623297.davem@davemloft.net>
Date:	Mon, 24 Nov 2008 16:05:47 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	kaber@...sh.net
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: netfilter 01/03: ctnetlink: fix conntrack creation race

From: Patrick McHardy <kaber@...sh.net>
Date: Mon, 24 Nov 2008 14:44:36 +0100 (MET)

>     netfilter: ctnetlink: fix conntrack creation race
>     
>     Conntrack creation through ctnetlink has two races:
>     
>     - the timer may expire and free the conntrack concurrently, causing an
>       invalid memory access when attempting to put it in the hash tables
>     
>     - an identical conntrack entry may be created in the packet processing
>       path in the time between the lookup and hash insertion
>     
>     Hold the conntrack lock between the lookup and insertion to avoid this.
>     
>     Reported-by: Zoltan Borbely <bozo@...rews.hu>
>     Signed-off-by: Patrick McHardy <kaber@...sh.net>
> 

Applied.
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