http://www.openssh.com/txt/gcmrekey.adv

--- ./monitor_wrap.c.orig
+++ ./monitor_wrap.c
@@ -480,7 +480,7 @@
 	buffer_init(&b);
 	buffer_append(&b, blob, blen);
 
-	newkey = xmalloc(sizeof(*newkey));
+	newkey = xcalloc(1, sizeof(*newkey));
 	enc = &newkey->enc;
 	mac = &newkey->mac;
 	comp = &newkey->comp;