From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 16 Mar 2012 02:00:34 +0000 (+0000)
Subject: netfilter: ctnetlink: fix race between delete and timeout expiration
X-Git-Tag: v3.3~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a16a1647fa6b6783c2e91623e72e86f0c2adac5e;p=pandora-kernel.git

netfilter: ctnetlink: fix race between delete and timeout expiration

Kerin Millar reported hardlockups while running `conntrackd -c'
in a busy firewall. That system (with several processors) was
acting as backup in a primary-backup setup.

After several tries, I found a race condition between the deletion
operation of ctnetlink and timeout expiration. This patch fixes
this problem.

Tested-by: Kerin Millar <kerframil@gmail.com>
Reported-by: Kerin Millar <kerframil@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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