xfs: Don't attempt to iterate over empty directory.

Reported by: Tuomas Tynkkynen

diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
index 9f66dd6..c6031bd 100644 (file)
--- a/grub-core/fs/xfs.c
+++ b/grub-core/fs/xfs.c
@@ -828,6 +828,9 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
            entries = (grub_be_to_cpu32 (tail->leaf_count)
                       - grub_be_to_cpu32 (tail->leaf_stale));
 
+           if (!entries)
+             continue;
+
            /* Iterate over all entries within this block.  */
            while ((char *)direntry < (char *)tail)
              {