From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Thu, 2 Jan 2014 10:52:20 +0000 (+0900)
Subject: GFS2: Fix unsafe dereference in dump_holder()
X-Git-Tag: v3.13-rc7~5^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b3a2c9968d453d5827e635a6f3d69129f70af66;p=pandora-kernel.git

GFS2: Fix unsafe dereference in dump_holder()

GLOCK_BUG_ON() might call this function without RCU read lock. Make sure that
RCU read lock is held when using task_struct returned from pid_task().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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