#fixed code
                              public Process exec(
      String namespace, String name, String[] command, String container, boolean stdin, boolean tty)
      throws ApiException, IOException {
    return newExecutionBuilder(namespace, name, command)
        .setContainer(container)
        .setStdin(stdin)
        .setTty(tty)
        .execute();
  }
#vulnerable code 
                              public Process exec(
      String namespace, String name, String[] command, String container, boolean stdin, boolean tty)
      throws ApiException, IOException {
    if (container == null) {
      CoreV1Api api = new CoreV1Api(apiClient);
      V1Pod pod = api.readNamespacedPod(name, namespace, "false", null, null);
      container = pod.getSpec().getContainers().get(0).getName();
    }
    String path = makePath(namespace, name, command, container, stdin, tty);

    ExecProcess exec = new ExecProcess(apiClient);
    WebSocketStreamHandler handler = exec.getHandler();
    WebSockets.stream(path, "GET", apiClient, handler);

    return exec;
  } 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE