From: Pavel Emelyanov <xemul@openvz.org>
Date: Thu, 31 Jul 2008 07:38:52 +0000 (-0700)
Subject: netfilter: xt_hashlimit: fix race between htable_destroy and htable_gc
X-Git-Tag: v2.6.27-rc2~102^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=967ab999a090b1a4e7d3c7febfd6d89b42fb4cf4;p=pandora-kernel.git

netfilter: xt_hashlimit: fix race between htable_destroy and htable_gc

Deleting a timer with del_timer doesn't guarantee, that the
timer function is not running at the moment of deletion. Thus
in the xt_hashlimit case we can get into a ticklish situation
when the htable_gc rearms the timer back and we'll actually
delete an entry with a pending timer.

Fix it with using del_timer_sync().

AFAIK del_timer_sync checks for the timer to be pending by
itself, so I remove the check.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed