From: Eric Sandeen <sandeen@sandeen.net>
Date: Wed, 25 Mar 2015 03:54:25 +0000 (+1100)
Subject: xfs: fix NULL pointer dereference in xfs_filestream_lookup_ag()
X-Git-Tag: omap-for-v4.2/o2_dc~34^2~3^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b26384dc52edba2f5fcc2b38eccc98e1f44bb379;p=pandora-kernel.git

xfs: fix NULL pointer dereference in xfs_filestream_lookup_ag()

If xfs_filestream_get_parent() fails, we have a null pip,
goto out, and attempt to IRELE(NULL).  This causes a null
pointer dereference and BUG().

Fix this by directly returning NULLAGNUMBER in this case.

Reported-by: Adrien Nader <adrien@notk.org>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

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