diff --git a/fs/exfat/fatent.c b/fs/exfat/fatent.c
index 5d8b7413d80d..0b49e6878222 100644
--- a/fs/exfat/fatent.c
+++ b/fs/exfat/fatent.c
@@ -455,6 +455,9 @@ int exfat_count_num_clusters(struct super_block *sb,
 			break;
 	}
 
+	if (i == sbi->num_clusters)
+		return -EIO;
+
 	*ret_count = count;
 	return 0;
 }