diff -r b64be2bc7a91 xen/common/page_alloc.c
--- a/xen/common/page_alloc.c	Tue Jan 15 14:24:05 2008 +0000
+++ b/xen/common/page_alloc.c	Tue Apr 01 21:35:32 2008 -0400
@@ -455,6 +455,7 @@ static void free_heap_pages(
         {
             cpus_clear(pg[i].u.free.cpumask);
         }
+        scrub_page(page_to_virt(&pg[i]));
     }
 
     spin_lock(&heap_lock);