From: Tao Ma <boyu.mt@taobao.com>
Date: Mon, 11 Jul 2011 22:26:01 +0000 (-0400)
Subject: ext4: fix a race which could leak memory in ext4_groupinfo_create_slab()
X-Git-Tag: v3.1-rc1~90^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=823ba01fc07751200c43e45733925a98b73eac3a;p=pandora-kernel.git

ext4: fix a race which could leak memory in ext4_groupinfo_create_slab()

In ext4_groupinfo_create_slab, we create ext4_groupinfo_caches within
ext4_grpinfo_slab_create_mutex, but set it outside the lock, and there
does exist some case that we may create it twice and causes a memory
leak.  So set it before we call mutex_unlock.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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