linux-kernel - Re: [net PATCH v3 3/3] net: netprio: fix cgrp create and write priomap race

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Message-Id: <20120816.151156.967092597887492349.davem@davemloft.net>
Date:	Thu, 16 Aug 2012 15:11:56 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	john.r.fastabend@...el.com
Cc:	viro@...IV.linux.org.uk, nhorman@...driver.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	joe@...ches.com
Subject: Re: [net PATCH v3 3/3] net: netprio: fix cgrp create and write
 priomap race

From: John Fastabend <john.r.fastabend@...el.com>
Date: Tue, 14 Aug 2012 15:34:35 -0700

> 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@...driver.com>
> Reported-by: Al Viro <viro@...IV.linux.org.uk>
> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>

Applied.
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