Index: linux-2.6.21-rc2/mm/slub.c
===================================================================
--- linux-2.6.21-rc2.orig/mm/slub.c	2007-02-28 17:52:24.000000000 -0800
+++ linux-2.6.21-rc2/mm/slub.c	2007-02-28 18:46:15.000000000 -0800
@@ -380,10 +380,10 @@ static int check_object(struct kmem_cach
 			return 0;
 	}
 
-	if (s->offset == 0 && active)
+	if (!s->offset && active)
 		/*
 		 * Object and freepointer overlap. Cannot check
-		 * if object is allocated.
+		 * freepointer while object is allocated.
 		 */
 		return 1;