#vulnerable code 
                                private static boolean userHasAdministerPermission() {
        return Jenkins.getInstance().getACL().hasPermission(Jenkins.ADMINISTER);
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private static boolean userHasAdministerPermission() {
        return Jenkins.get().hasPermission(Jenkins.ADMINISTER);
    }