Index: sys/kern/sys_process.c
===================================================================
--- sys/kern/sys_process.c
+++ sys/kern/sys_process.c
@@ -390,8 +390,7 @@
 			error = EINVAL;
 			break;
 		}
-		while (entry != &map->header &&
-		    (entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0) {
+		while ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) != 0) {
 			entry = entry->next;
 			index++;
 		}
Index: sys/vm/vm_map.c
===================================================================
--- sys/vm/vm_map.c
+++ sys/vm/vm_map.c
@@ -796,6 +796,7 @@
 {
 
 	map->header.next = map->header.prev = &map->header;
+	map->header.eflags = 0;
 	map->needs_wakeup = FALSE;
 	map->system_map = 0;
 	map->pmap = pmap;