diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index a0972219ccfc5fccee139c46d9f4fd97445973e2..0373ae49d24dc43f491822ceedc7f8c5c1da45f3 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -507,6 +507,9 @@ void *__unflatten_device_tree(const void *blob,
 
 	/* Allocate memory for the expanded device tree */
 	mem = dt_alloc(size + 4, __alignof__(struct device_node));
+	if (!mem)
+		return NULL;
+
 	memset(mem, 0, size);
 
 	*(__be32 *)(mem + size) = cpu_to_be32(0xdeadbeef);