diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index e84e8807c6514fa92a7912ea6986a5e767daacea..bcf893c3d9036d0eb743ff8c34bae2eda23e9582 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -121,6 +121,13 @@ static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
 			*max_slots = max_len;
 			max_len = 0;
 		}
+
+		/*
+		 * For the most part, it should be a bug when name_len is zero.
+		 * We stop here for figuring out where the bugs are occurred.
+		 */
+		f2fs_bug_on(!de->name_len);
+
 		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
 	}