Bug#774147: libisofs: buffer overflow in demo.c

[Jakub Wilk]

Source: libisofs
Version: 1.3.2-1.1
Tags: patch

The attached patch fixes buffer overflow in the demo.

--
Jakub Wilk

--- a/demo/demo.c
+++ b/demo/demo.c
@@ -445,7 +445,8 @@
         sp[i+1] = ' ';
     }
 
-    sp[level * 2-1] = '-';
+    if (level > 0)
+        sp[level * 2-1] = '-';
     sp[level * 2] = '\0';
 
     ret = iso_file_source_open(dir);