From: NeilBrown <neilb@suse.de>
Date: Wed, 24 Jul 2013 05:37:42 +0000 (+1000)
Subject: md/raid10: remove use-after-free bug.
X-Git-Tag: v3.11-rc3~16^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0eb25bb027a100f5a9df8991f2f628e7d851bc1e;p=pandora-kernel.git

md/raid10: remove use-after-free bug.

We always need to be careful when calling generic_make_request, as it
can start a chain of events which might free something that we are
using.

Here is one place I wasn't careful enough.  If the wbio2 is not in
use, then it might get freed at the first generic_make_request call.
So perform all necessary tests first.

This bug was introduced in 3.3-rc3 (24afd80d99) and can cause an
oops, so fix is suitable for any -stable since then.

Cc: stable@vger.kernel.org (3.3+)
Signed-off-by: NeilBrown <neilb@suse.de>
---

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