# Re: \[GIT PULL\] namespaces related fixes for v4.11-rc1

- From: Aleksa Sarai \<hidden\>
- Date: 2017-02-23 02:21:42 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2017/02/118025
- Thread: https://ratatoskr.run/linux-fsdevel/2017/02/118026/t.md

```text
>>> The only known user of this prctl systemd
>>> forks all children after the prctl.  So no userspace regressions will
>>> occur.
>>
>> Note that runC and containerd (and thus Docker) as well as cri-o use the prctl
>> as well -- to be able to collect exit codes from a non-child process (namely to
>> collect the exit code from PID 1 in the container).
>
> Are any of those affected by the change?  I would not expect so.  As it
> would require having children or grand children whose exit codes you
> don't want to collect.

AFAICS they do appear to work (and runC definitely calls the prctl before it creates the container init process -- so it shouldn't break anything for runC). I was just pointing out that systemd isn't the only major userspace user of the prctl (for future reference).

-- 
Aleksa Sarai
Software Engineer (Containers)
SUSE Linux GmbH
https://www.cyphar.com/
```