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Date:	Sat, 21 May 2011 23:42:49 +0800
From:	Changli Gao <>
To:	Patrick McHardy <>
Cc:	Eric Dumazet <>,
	"Oleg A. Arkhangelsky" <>,,,
	Paul E McKenney <>
Subject: Re: Kernel panic nf_nat_setup_info+0x5b3/0x6e0

On Tue, Apr 5, 2011 at 7:49 PM, Patrick McHardy <> wrote:
> I think what's happening is that the conntrack entry is destroyed
> and the NAT ct_extend destructor invoked, which removes the nat
> extension from the RCU protected bysource hash, after which the
> entire extension area is freed. Another CPU might still find the
> old NAT entry with undefined contents in the hash though, so I
> think using RCU to free the extension area is correct.

What is the conclusion? Is my patch acceptable? Thanks.

Changli Gao(
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