pwritev2 regression test for invalid flags

[Florian Weimer]

On 06/21/2017 03:06 PM, Adhemerval Zanella wrote:
> 
> 
> On 21/06/2017 08:45, Florian Weimer wrote:
>> On 06/20/2017 10:53 PM, Stephen  Bates wrote:
>>>>
>>>>> I've already sent this patch to Al twice (including a stable tag),
>>>>> but it didn't seem to make it anywhere.
>>>
>>> Does anyone have ideas how we move this along? This is the missing link in allowing applications to request IO polling…
>>
>> Is this still an issue with the upstream kernel?
>>
>> As far as I can tell, Greg Kroah-Hartman queued the fix for 4.9 and
>> 4.11, and the fix is in mainline, too:
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=20223f0f39ea9d31ece08f04ac79f8c4e8d98246
> 
> Would it be acceptable to add an issue that stress this issue on glibc?

Sure, except that it is difficult to pull a guaranteed-to-be-invalid
combination of flags out of thin air.  Even -1 might eventually cease to
work.

Thanks,
Florian