[LTP] [PATCH v2] Fix prctl02

[Yang Xu]

Hi!
> Hi!
>>> The prctl() system call takes 5 integer arguments but only 3 of them were
>>> passed in the test. This means that the system call read random garbage
>>> from stack in place of the two missing arguments and failed even on some
>>> perfectly valid combinations of arguments on some platforms.
>>>
>>> - Change num_invalid to ULONG_MAX
>>> - Fix arguments in test case 9, 13 and 14
>>> - Fix test call of prctl() to have all 5 arguments
>> looks prctl manpages and kernel code, you are right, Thanks for the fix!
>> Feel free to add??
>> Reviewed-by: xuyang_jy_0410@163.com
>> Tested-by: xuyang_jy_0410@163.com
>>
>> Also, do we should use 5 arguments for other prctl test cases?
> 
> It depends on the option argument, the PR_CAP_AMBIENT explicitely states
> that arg4 and arg5 must be set to 0 as well as the
> PR_GET_SPECULATION_CTRL.
> 
> Some of the options explicitely say that some arguments are ignored.
> 
> And some, including PR_SET_NO_NEW_PRIVS does not say anyting.
Thanks for your answer. I see.
>