#vulnerable code 
                                private Pod getPodTemplate(KubernetesSlave slave, Label label) {
        final PodTemplate template = getTemplate(label);
        String id = getIdForLabel(label);
        Pod pod = new Pod();

        KubernetesHelper.setName(pod, slave.getNodeName());

        pod.getMetadata().setLabels(getLabelsFor(id));

        Container manifestContainer = new Container();

        manifestContainer.setName(CONTAINER_NAME);
        manifestContainer.setImage(template.getImage());
        if (template.isPrivileged())
            manifestContainer.setSecurityContext(new SecurityContext(null, true, null, null));

        List<EnvVar> env = new ArrayList<EnvVar>(3);
        // always add some env vars
        env.add(new EnvVar("JENKINS_SECRET", slave.getComputer().getJnlpMac(), null));
        env.add(new EnvVar("JENKINS_LOCATION_URL", JenkinsLocationConfiguration.get().getUrl(), null));
        String url = StringUtils.isBlank(jenkinsUrl) ? JenkinsLocationConfiguration.get().getUrl() : jenkinsUrl;
        env.add(new EnvVar("JENKINS_URL", url, null));
        if (!StringUtils.isBlank(jenkinsTunnel)) {
            env.add(new EnvVar("JENKINS_TUNNEL", jenkinsTunnel, null));
        }
        url = url.endsWith("/") ? url : url + "/";
        env.add(new EnvVar("JENKINS_JNLP_URL", url + slave.getComputer().getUrl() + "slave-agent.jnlp", null));
        manifestContainer.setEnv(env);

        // command: SECRET SLAVE_NAME
        List<String> cmd = parseDockerCommand(template.getCommand());
        List<String> args = parseDockerCommand(template.getArgs());
        args = args == null ? new ArrayList<String>(2) : args;
        args.add(slave.getComputer().getJnlpMac()); // secret
        args.add(slave.getComputer().getName()); // name
        manifestContainer.setCommand(cmd);
        manifestContainer.setArgs(args);

        List<Container> containers = new ArrayList<Container>();
        containers.add(manifestContainer);

        PodSpec podSpec = new PodSpec();
        pod.setSpec(podSpec);
        podSpec.setContainers(containers);
        podSpec.setRestartPolicy("Never");

        return pod;
    } 
                            #location 13 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private Pod getPodTemplate(KubernetesSlave slave, Label label) {
        final PodTemplate template = getTemplate(label);
        String id = getIdForLabel(label);
        List<EnvVar> env = new ArrayList<EnvVar>(3);
        // always add some env vars
        env.add(new EnvVar("JENKINS_SECRET", slave.getComputer().getJnlpMac(), null));
        env.add(new EnvVar("JENKINS_LOCATION_URL", JenkinsLocationConfiguration.get().getUrl(), null));
        String url = StringUtils.isBlank(jenkinsUrl) ? JenkinsLocationConfiguration.get().getUrl() : jenkinsUrl;
        env.add(new EnvVar("JENKINS_URL", url, null));
        if (!StringUtils.isBlank(jenkinsTunnel)) {
            env.add(new EnvVar("JENKINS_TUNNEL", jenkinsTunnel, null));
        }
        url = url.endsWith("/") ? url : url + "/";
        env.add(new EnvVar("JENKINS_JNLP_URL", url + slave.getComputer().getUrl() + "slave-agent.jnlp", null));

        return new PodBuilder()
                .withNewMetadata()
                    .withName(slave.getNodeName())
                    .withLabels(getLabelsFor(id))
                .endMetadata()
                .withNewSpec()
                    .addNewContainer()
                        .withName(CONTAINER_NAME)
                        .withImage(template.getImage())
                        .withNewSecurityContext()
                            .withPrivileged(template.isPrivileged())
                        .endSecurityContext()
                        .withEnv(env)
                        .withCommand(parseDockerCommand(template.getCommand()))
                        .addToArgs(slave.getComputer().getJnlpMac())
                        .addToArgs(slave.getComputer().getName())
                .endContainer()
                .withRestartPolicy("Never")
                .endSpec()
                .build();
    }