From: Patrick McHardy <kaber@trash.net>
Date: Mon, 14 Feb 2011 16:35:07 +0000 (+0100)
Subject: netfilter: nf_iterate: fix incorrect RCU usage
X-Git-Tag: v2.6.38-rc6~20^2~19^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de9963f0f2dfad128b26ae7bf6005f5948416a6d;p=pandora-kernel.git

netfilter: nf_iterate: fix incorrect RCU usage

As noticed by Eric, nf_iterate doesn't use RCU correctly by
accessing the prev pointer of a RCU protected list element when
a verdict of NF_REPEAT is issued.

Fix by jumping backwards to the hook invocation directly instead
of loading the previous list element before continuing the list
iteration.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---

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