[sr-dev] [kamailio/kamailio] Kamailio 5.3.0 crashed when exec module tried to execute external program (#2165)

[Konstantin]

It is easy to reproduce, just call exec_avp with sh script which has sleep 1 min. 

Please find below part of configuration file where the exec_avp is used:

failure_route[HANDLE_FAILURE_ON_INCOMING_REQ] {
    if (t_is_canceled()) {
        exit;
    }

    if (t_branch_timeout()) {

        if (t_branch_replied()) {

            // A local timeout after some provsional reply.
            xlog("L_WARN", "No final response on request $rm CSeq:$cs ($ci)!\n");

        } else {
            // A local transaction timed out w/o any reply received.
            // In case incoming calls that means out Telephony doesn't reply.

            xlog("L_ERR", "Failover on request $rm CSeq:$cs ($ci)!\n");

            // Set current Telephony to inactive probbing state
            ds_mark_dst("IP");

            // Checking next endpoint from the destination list
            if (!ds_next_dst()) {
                t_reply("503", "Service Unavailable");
                xlog("L_CRIT","Failure route: All Telephony servers are invactive!\n");

                if ($shv(is_zabbix_event_sent) == 0) {
                    $shv(is_zabbix_event_sent) = 1;
                    exec_avp("etc/kamailio/run_zabbix_sender.sh ecsp_no_telephony");
                    xlog("L_NOTICE","ecsp_no_telephony event is sent to zabbix\n");
                }

                exit;
            }

            xlog("L_ERR", "Try to send to $rd:$rp ($ci)\n");

            route(RELAY);
        }
    }

}


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