Index: /trunk/src/VBox/Devices/Network/slirp/misc.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/misc.c	(revision 26638)
+++ /trunk/src/VBox/Devices/Network/slirp/misc.c	(revision 26639)
@@ -379,5 +379,5 @@
         RTMemFree(it);
     }
-    while (!LIST_EMPTY(&zone->used_items))
+    while (zone->master_zone == NULL && !LIST_EMPTY(&zone->used_items))
     {
         it = LIST_FIRST(&zone->used_items);