From: David Sterba <dsterba@suse.cz>
Date: Fri, 26 Apr 2013 15:20:23 +0000 (+0000)
Subject: btrfs: read entire device info under lock
X-Git-Tag: v3.10-rc1~31^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55793c0d0381176e727389325d9a47f7f0b5387f;p=pandora-kernel.git

btrfs: read entire device info under lock

There's a theoretical possibility of reading stale (or even more
theoretically, freed) data from DEV_INFO ioctl when the device would
disappear between an early mutex unlock and data being copied from the
device structure.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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