Index: head/sys/dev/fdt/fdt_common.c
===================================================================
--- head/sys/dev/fdt/fdt_common.c
+++ head/sys/dev/fdt/fdt_common.c
@@ -60,6 +60,7 @@
 #define FDT_TYPE_LEN	64
 
 #define FDT_REG_CELLS	4
+#define FDT_RANGES_SIZE 48
 
 SYSCTL_NODE(_hw, OID_AUTO, fdt, CTLFLAG_RD, 0, "Flattened Device Tree");
 
@@ -149,7 +150,7 @@
 int
 fdt_get_range(phandle_t node, int range_id, u_long *base, u_long *size)
 {
-	pcell_t ranges[6], *rangesptr;
+	pcell_t ranges[FDT_RANGES_SIZE], *rangesptr;
 	pcell_t addr_cells, size_cells, par_addr_cells;
 	u_long par_bus_addr, pbase, psize;
 	int err, len, tuple_size, tuples;