gdhcp: Make sure we have the message before accessing it

diff --git a/gdhcp/client.c b/gdhcp/client.c
index a51857f..ec1b2a2 100644 (file)
--- a/gdhcp/client.c
+++ b/gdhcp/client.c
@@ -1865,6 +1865,9 @@ static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
                return TRUE;
 
        if (dhcp_client->type == G_DHCP_IPV6) {
+               if (packet6 == NULL)
+                       return TRUE;
+
                count = 0;
                client_id = dhcpv6_get_option(packet6, pkt_len,
                                G_DHCPV6_CLIENTID, &option_len, &count);