--- ./kernel/fork.c.orig	Sun Oct 26 11:40:02 2003
+++ ./kernel/fork.c	Sun Oct 26 15:27:45 2003
@@ -757,8 +757,12 @@
 		goto bad_fork_cleanup_namespace;
 	p->semundo = NULL;
 
-	if (p->mm && !(clone_flags & CLONE_VM))
-		ctx_pages_add(p->mm->mm_s_info, RLIMIT_AS, p->mm->total_vm);
+	if (p->mm && !(clone_flags & CLONE_VM)) {
+		if (ctx_pages_avail(p->mm, p->mm->total_vm)) 
+			ctx_pages_add(p->mm->mm_s_info, RLIMIT_AS, p->mm->total_vm);
+		else
+			goto bad_fork_cleanup_namespace;
+	}
 	
 	/* Our parent execution domain becomes current domain
 	   These must match for thread signalling to apply */