From f5929cd814ca0a7012bf31d566c8bbd0cd469322 Mon Sep 17 00:00:00 2001
From: Filipe David Borba Manana <fdmanana@gmail.com>
Date: Wed, 31 Jul 2013 00:26:35 +0100
Subject: Btrfs: add missing error check to find_parent_nodes

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 8bc5e8c..980e85a 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -935,8 +935,10 @@ again:
 				}
 				ret = find_extent_in_eb(eb, bytenr,
 							*extent_item_pos, &eie);
-				ref->inode_list = eie;
 				free_extent_buffer(eb);
+				if (ret < 0)
+					goto out;
+				ref->inode_list = eie;
 			}
 			ret = ulist_add_merge(refs, ref->parent,
 					      (uintptr_t)ref->inode_list,
-- 
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