bus/dpaa: verify strdup return

[ upstream commit 2729fa6654b328bb4b9a0ede6d1e1019bd6caf0c ]

Add verify strdup return value logic.

Fixes: e79df83 ("bus/dpaa: support hotplug ops")

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Acked-by: Sachin Saxena <sachin.saxena@nxp.com>

drivers/bus/dpaa/dpaa_bus.c

@@ -782,6 +782,10 @@ dpaa_bus_dev_iterate(const void *start, const char *str,
 
 	/* Now that name=device_name format is available, split */
 	dup = strdup(str);
+	if (dup == NULL) {
+		DPAA_BUS_DEBUG("Dup string (%s) failed!\n", str);
+		return NULL;
+	}
 	dev_name = dup + strlen("name=");
 
 	if (start != NULL) {