From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Mon, 6 Jul 2009 08:10:23 +0000 (+0800)
Subject: tracing/workqueues: Add refcnt to struct cpu_workqueue_stats
X-Git-Tag: v2.6.32-rc1~718^2~85
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a35780005eb256eb5ec83ffcc802967295887a45;p=pandora-kernel.git

tracing/workqueues: Add refcnt to struct cpu_workqueue_stats

The stat entries can be freed when the stat file is being read.
The worse is, the ptr can be freed immediately after it's returned
from workqueue_stat_start/next().

Add a refcnt to struct cpu_workqueue_stats to avoid use-after-free.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A51B16F.6010608@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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