Index: sys/vm/uma_core.c
===================================================================
--- sys/vm/uma_core.c
+++ sys/vm/uma_core.c
@@ -2357,7 +2357,8 @@
 	zone->uz_flags = 0;
 	zone->uz_warning = NULL;
 	/* The domain structures follow the cpu structures. */
-	zone->uz_domain = (struct uma_zone_domain *)&zone->uz_cpu[mp_ncpus];
+	zone->uz_domain =
+	    (struct uma_zone_domain *)&zone->uz_cpu[mp_maxid + 1];
 	zone->uz_bkt_max = ULONG_MAX;
 	timevalclear(&zone->uz_ratecheck);