mdns: Fix crashes reported by the fuzzer tests
@@ -3171,9 +3171,9 @@ void mdns_parse_packet(mdns_rx_packet_t * packet)
if (discovery) {
service = _mdns_get_service_item(name->service, name->proto, NULL);
_mdns_remove_parsed_question(parsed_packet, MDNS_TYPE_SDPTR, service);
- } else if (parsed_packet->questions && !parsed_packet->probe) {
+ } else if (service && parsed_packet->questions && !parsed_packet->probe) {
_mdns_remove_parsed_question(parsed_packet, type, service);
- } else {
+ } else if (service) {
//check if TTL is more than half of the full TTL value (4500)
if (ttl > 2250) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, service);
@@ -3262,7 +3262,7 @@ void mdns_parse_packet(mdns_rx_packet_t * packet)
}
_mdns_restart_all_pcbs();
}
- } else {
+ } else if (service) {
_mdns_pcb_send_bye(packet->tcpip_if, packet->ip_protocol, &service, 1, false);
_mdns_init_pcb_probe(packet->tcpip_if, packet->ip_protocol, &service, 1, false);
}
