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>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 8bc5e8ccb091..980e85a264c0 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,