Re: [PATCH v4] reboot: fix cad_pid use-after-free race

[Oleg Nesterov]

On 08/14, Cen Zhang (Microsoft) wrote:
>
> v4:
>  - Rebase on sysctl-next after Oleg's cad_pid sysctl placement change.
>  - Fold the two-patch v3 series into a single lifetime fix.
>  - Move kill_cad_pid() implementation to kernel/signal.c.
>  - Export kill_cad_pid() and stop exporting the raw cad_pid pointer.
>  - Update proc_do_cad_pid() in kernel/reboot.c.
>  - Add explicit includes for the RCU API and kill_cad_pid().
>  - Preserve the original unprivileged impact context while noting that
>    the namespace permission path has been fixed separately.

I don't see other changes in this version, so

Reviewed-by: Oleg Nesterov <oleg@xxxxxxxxxx>