mdns: limit the GOT_IP6_EVENT to only known network interfaces

components/mdns/mdns.c

@@ -3176,8 +3176,10 @@ static void _mdns_handle_system_event(esp_event_base_t event_base,
             case IP_EVENT_GOT_IP6:
             {
                 mdns_if_t mdns_if = _mdns_get_if_from_esp_netif(interface);
-                _mdns_enable_pcb(mdns_if, MDNS_IP_PROTOCOL_V6);
-                _mdns_announce_pcb(mdns_if, MDNS_IP_PROTOCOL_V4, NULL, 0, true);
+                if (mdns_if != MDNS_IF_MAX) {
+                    _mdns_enable_pcb(mdns_if, MDNS_IP_PROTOCOL_V6);
+                    _mdns_announce_pcb(mdns_if, MDNS_IP_PROTOCOL_V4, NULL, 0, true);
+                }
 
             }
                 break;