1 files changed, 2 insertions, 1 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index ca9d8f1a3bb6..fe032ab6bd8a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -867,7 +867,8 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
 
         if (btrfs_block_can_be_shared(root, buf)) {
                 ret = btrfs_lookup_extent_info(trans, root, buf->start,
-                                               buf->len, &refs, &flags);
+                                               btrfs_header_level(buf), 1,
+                                               &refs, &flags);
                 if (ret)
                         return ret;
                 if (refs == 0) {