Re: [PATCH v5 0/2] Linux: Fix posix_spawn when user with time namespaces

[Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>]

On 18/07/22 23:33, Carlos O'Donell wrote:
> On 7/11/22 12:56, Adhemerval Zanella wrote:
>>
>>
>>> On 11 Jul 2022, at 12:32, Carlos O'Donell <carlos@redhat.com> wrote:
>>>
>>> On 5/30/22 13:49, Adhemerval Zanella via Libc-alpha wrote:
>>>> The patchset also adds some support to tests the fallback code
>>>> to use only use CLONE_VFORK.  It uses unshare directly because
>>>> it simpler than add container support.
>>>>
>>>> v5: Use a MAP_SHARED page to communicate error on prepare phase from
>>>>    helper process.
>>>
>>> The current progress is that it seems we may get the upstream Linux kernel
>>> to change the semantics of the time namespace to take effect only after
>>> exec for vfork. If that goes forward we won't need these changes?
>>>
>>> I'm trying to determine if these changes constitute a blocker for 2.36.
>>
>> My understanding is even kernel does change or add a new flag to handle
>> it, we still have released kernels that might hit this issue.
>  
> Thanks. In which case I don't consider this a blocker for 2.36. It's a bug that we can fix
> in 2.37 and backport to 2.36 when we've completed the review. I've started looking at these
> changes but I think we need more testing in downstream. If we fix this when 2.37 opens we
> can start testing it in Fedora Rawhide early, and backport after we know we don't have
> further issues.
> 

I agree, I have not added it as a 2.36 as blocker although it would be
a good thing to have.