From: John Fastabend <john.r.fastabend@intel.com>
Date: Tue, 14 Aug 2012 12:34:35 +0000 (+0000)
Subject: net: netprio: fix cgrp create and write priomap race
X-Git-Tag: v3.6-rc3~10^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=476ad154f3b41dd7d9a08a2f641e28388abc2fd1;p=pandora-kernel.git

net: netprio: fix cgrp create and write priomap race

A race exists where creating cgroups and also updating the priomap
may result in losing a priomap update. This is because priomap
writers are not protected by rtnl_lock.

Move priority writer into rtnl_lock()/rtnl_unlock().

CC: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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