std::string SessionStore::WriteBatch::PutAndUpdateTracker(
    const sync_pb::SessionSpecifics& specifics,
    base::Time modification_time) {
  UpdateTrackerWithSpecifics(specifics, modification_time, session_tracker_);
  return PutWithoutUpdatingTracker(specifics);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.