From: Daniel J Blueman <daniel.blueman@gmail.com>
Date: Thu, 23 Jun 2011 15:01:01 +0000 (+0800)
Subject: btrfs: fix oops on failure path
X-Git-Tag: v3.2-rc1~21^2~23^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=068132bad1de70f85f5f6d12c36d64f8f7848d92;p=pandora-kernel.git

btrfs: fix oops on failure path

If lookup_extent_backref fails, path->nodes[0] reasonably could be
null along with other callers of btrfs_print_leaf, so ensure we have a
valid extent buffer before dereferencing.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
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