netdev - Re: [PATCH v2] net: fix for a race condition in the inet frag code

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Date:	Wed, 05 Mar 2014 20:34:53 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	nikolay@...hat.com
Cc:	netdev@...r.kernel.org, fw@...len.de, brouer@...hat.com
Subject: Re: [PATCH v2] net: fix for a race condition in the inet frag code

From: Nikolay Aleksandrov <nikolay@...hat.com>
Date: Mon,  3 Mar 2014 23:19:18 +0100

> The fix is simple, just move the lru_add under the hash chain locked
> region so when a removing function is called it'll have to wait for the
> fragment to be added to the lru_list, and then it'll remove it (it works
> because the hash chain removal is done before the lru_list one and
> there's no window between the two list adds when the frag can get
> dropped). With this fix applied I couldn't kill the same machine in 24
> hours with the same setup.
> 
> Fixes: 3ef0eb0db4bf ("net: frag, move LRU list maintenance outside of
> rwlock")

Applied and queued up for -stable, thanks.
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