linux-kernel - [PATCH 0/8] Fixes for common mistakes w/ for_each

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Message-ID: <20120207064809.GA29061@oksana.dev.rtsoft.ru>
Date:	Tue, 7 Feb 2012 10:48:09 +0400
From:	Anton Vorontsov <anton.vorontsov@...aro.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	Russell King <linux@....linux.org.uk>,
	Mike Frysinger <vapier@...too.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Richard Weinberger <richard@....at>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/8] Fixes for common mistakes w/ for_each_process and
 task->mm

Hi all,

While working on lowmemorykiller driver, I stumbled upon several places
where we traverse the tasklist in an unsafe manner, plus there are a
few cases of unsafe access to task->mm.

Note that some patches were not tested (e.g. sh, blackfin), so please
take a closer look if there's silly mistakes. Also special attention
needed for patch 7/8 (UML specific).

Oleg,

For sysrq case I kept the force_sig() usage, this is because in sysrq
case I belive we do want to kill PID namespace init processes. If using
force_sig() is still a bad idea, I guess we should fix it somehow
else.

Thanks.

-- 
Anton Vorontsov
Email: cbouatmailru@...il.com
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