From c42acc23ff91ea0170eab5f1e10499dcfc4e0c92 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Wed, 30 Aug 2017 15:56:19 +0200
Subject: [PATCH] xfs: Don't attempt to iterate over empty directory.

Reported by: Tuomas Tynkkynen
---
 grub-core/fs/xfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
index 9f66dd6e4..c6031bd3f 100644
--- 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)
 	      {