--- linux-2.6.6/mm/mremap.c.old	2004-06-14 19:48:36.000000000 +0400
+++ linux-2.6.6/mm/mremap.c	2004-06-19 11:54:28.508681472 +0400
@@ -320,7 +320,7 @@
 	if (old_len > vma->vm_end - addr)
 		goto out;
 	if (vma->vm_flags & VM_DONTEXPAND) {
-		if (new_len > old_len)
+		if (new_len > vma->vm_end - addr)
 			goto out;
 	}
 	if (vma->vm_flags & VM_LOCKED) {