qos.transport().transport_type is not initialized but used

[firmianay]

Is there an already existing issue for this?

• I have searched the existing issues

Expected behavior

...

Current behavior

Found when scanning with Coverity, qos.transport().transport_type does not seem to be initialized, which may cause problems such as crash. When xml_config_file_.length() <= 0U, it will enter create_participant().
https://wiki.sei.cmu.edu/confluence/display/cplusplus/EXP53-CPP.+Do+not+read+uninitialized+memory

bool OnlineLogSubscriber::init(const std::string& xml_config_file) {
    // CREATE THE PARTICIPANT
    DomainParticipantQos pqos;
    pqos.name("Participant_sub");

    /* Create DomainParticipant*/
    std::string participant_profile_name = "sub_participant_profile";
    xml_config_file_                     = xml_config_file;
    // Load XML configuration
    if (xml_config_file_.length() > 0U) {
        if (ReturnCode_t::RETCODE_OK != DomainParticipantFactory::get_instance()->get_participant_qos_from_profile(
                                            participant_profile_name, pqos)) {
            return false;
        }
    }

    participant_ = DomainParticipantFactory::get_instance()->create_participant(log_doamin_, pqos);

DomainParticipant* DomainParticipantFactory::create_participant(DomainId_t did, const DomainParticipantQos& qos,
                                                                DomainParticipantListener* listen,
                                                                const StatusMask& mask) {
...

    const DomainParticipantQos& pqos = (&qos == &PARTICIPANT_QOS_DEFAULT) ? default_participant_qos_ : qos;

    logInfo(PARTICIPANT, "PARTICIPANT_QOS_DEFAULT.transport_type:"
                             << PARTICIPANT_QOS_DEFAULT.transport().transport_type
                             << " default_participant_qos_.transport().transport_type:"
                             << default_participant_qos_.transport().transport_type
                             << " qos.transport().transport_type:" << qos.transport().transport_type
                             << " pqos.transport().transport_type:" << pqos.transport().transport_type
                             << " equal?:" << (&qos == &PARTICIPANT_QOS_DEFAULT));

Steps to reproduce

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Fast DDS version/commit

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Platform/Architecture

Ubuntu Focal 20.04 amd64

Transport layer

Default configuration, UDPv4 & SHM

Additional context

No response

XML configuration file

No response

Relevant log output

No response

Network traffic capture

No response