netdev - Re: [patch 2/2] proc_fork_connector: a lockless ->real

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Message-Id: <20110728.182705.1674417841277333408.davem@davemloft.net>
Date:	Thu, 28 Jul 2011 18:27:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	netdev@...r.kernel.org, oleg@...hat.com, johnpol@....mipt.ru,
	vzapolskiy@...il.com, zbr@...emap.net
Subject: Re: [patch 2/2] proc_fork_connector: a lockless ->real_parent
 usage is not safe

From: akpm@...ux-foundation.org
Date: Thu, 28 Jul 2011 13:54:25 -0700

> From: Oleg Nesterov <oleg@...hat.com>
> 
> proc_fork_connector() uses ->real_parent lockless.  This is not safe if
> copy_process() was called with CLONE_THREAD or CLONE_PARENT, in this case
> the parent != current can go away at any moment.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>
> Cc: Vladimir Zapolskiy <vzapolskiy@...il.com>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Evgeniy Polyakov <zbr@...emap.net>
> Cc: Evgeniy Polyakov <johnpol@....mipt.ru>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

Applied.
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