Refs #21355. Protect InnerDataReaderListener::on_reader_matched.

Signed-off-by: Miguel Company <miguelcompany@eprosima.com>

Author: MiguelCompany

src/cpp/fastdds/subscriber/DataReaderImpl.cpp

@@ -941,6 +941,8 @@ void DataReaderImpl::InnerDataReaderListener::on_reader_matched(
         RTPSReader* /*reader*/,
         const MatchingInfo& info)
 {
+    std::lock_guard<std::mutex> scoped_lock(matching_info_mutex_);
+
     data_reader_->update_subscription_matched_status(info);
 
     StatusMask notify_status = StatusMask::subscription_matched();

src/cpp/fastdds/subscriber/DataReaderImpl.hpp

@@ -511,7 +511,10 @@ class DataReaderImpl
                 const uint32_t& status_id);
 #endif //FASTDDS_STATISTICS
 
+    private:
+
         DataReaderImpl* data_reader_;
+        std::mutex matching_info_mutex_;
 
     }
     reader_listener_;