Index: linux-2.6.18-rc7-mm1/mm/mempolicy.c
===================================================================
--- linux-2.6.18-rc7-mm1.orig/mm/mempolicy.c	2006-09-19 09:27:03.000000000 -0500
+++ linux-2.6.18-rc7-mm1/mm/mempolicy.c	2006-09-21 12:59:09.385528424 -0500
@@ -1136,7 +1136,9 @@ static unsigned interleave_nodes(struct 
  */
 unsigned slab_node(struct mempolicy *policy)
 {
-	switch (policy->policy) {
+	int pol = policy ? policy->policy : MPOL_DEFAULT;
+
+	switch (pol) {
 	case MPOL_INTERLEAVE:
 		return interleave_nodes(policy);