#vulnerable code 
                                @GetMapping()
    public String profile(ModelMap mmap)
    {
        SysUser user = getUser();
        user.setSex(dictDataService.selectDictLabel("sys_user_sex", user.getSex()));
        mmap.put("user", user);
        mmap.put("roleGroup", userService.selectUserRoleGroup(user.getUserId()));
        mmap.put("postGroup", userService.selectUserPostGroup(user.getUserId()));
        return prefix + "/profile";
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @GetMapping()
    public String profile(ModelMap mmap)
    {
        SysUser user = getSysUser();
        user.setSex(dictDataService.selectDictLabel("sys_user_sex", user.getSex()));
        mmap.put("user", user);
        mmap.put("roleGroup", userService.selectUserRoleGroup(user.getUserId()));
        mmap.put("postGroup", userService.selectUserPostGroup(user.getUserId()));
        return prefix + "/profile";
    }