dhcp: Check NULL pointer dereference

diff --git a/src/dhcp.c b/src/dhcp.c
index b267074..22eca60 100644 (file)
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -294,7 +294,8 @@ static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 
                dhcp->nameservers = nameservers;
 
-               for (i = 0; dhcp->nameservers[i] != NULL; i++) {
+               for (i = 0; dhcp->nameservers != NULL &&
+                                       dhcp->nameservers[i] != NULL; i++) {
                        __connman_service_nameserver_append(service,
                                                dhcp->nameservers[i], FALSE);
                }
@@ -313,7 +314,8 @@ static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 
                dhcp->timeservers = timeservers;
 
-               for (i = 0; dhcp->timeservers[i] != NULL; i++) {
+               for (i = 0; dhcp->timeservers != NULL &&
+                                        dhcp->timeservers[i] != NULL; i++) {
                        __connman_service_timeserver_append(service,
                                                        dhcp->timeservers[i]);
                }