netdev - Re: rhashtable: Fix potential crash on destroy in rhashtable

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Message-Id: <20150202.191948.1745138515710019835.davem@davemloft.net>
Date:	Mon, 02 Feb 2015 19:19:48 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	tgraf@...g.ch, netdev@...r.kernel.org
Subject: Re: rhashtable: Fix potential crash on destroy in rhashtable_shrink

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Sat, 31 Jan 2015 20:36:38 +1100

> The current being_destroyed check in rhashtable_expand is not
> enough since if we start a shrinking process after freeing all
> elements in the table that's also going to crash.
> 
> This patch adds a being_destroyed check to the deferred worker
> thread so that we bail out as soon as we take the lock.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied to net-next
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