$NetBSD: patch-CVE-2012-4411,v 1.1 2012/09/12 11:09:33 drochner Exp $

see http://lists.xen.org/archives/html/xen-devel/2012-09/msg00465.html

--- ioemu-qemu-xen/vl.c.orig	2012-04-24 17:35:40.000000000 +0000
+++ ioemu-qemu-xen/vl.c
@@ -4910,7 +4910,7 @@ int main(int argc, char **argv, char **e
     kernel_cmdline = "";
     cyls = heads = secs = 0;
     translation = BIOS_ATA_TRANSLATION_AUTO;
-    monitor_device = "vc:80Cx24C";
+    monitor_device = "null";
 
     serial_devices[0] = "vc:80Cx24C";
     for(i = 1; i < MAX_SERIAL_PORTS; i++)
