Re: [PATCH v4 2/2] procfs/tasks: add a simple per-task procfs hidepid= field

[Kees Cook]

On Wed, Jan 18, 2017 at 3:35 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
> On Wed, Jan 18, 2017 at 2:50 PM, Djalal Harouni <tixxdz@xxxxxxxxx> wrote:
>> Andy I don't follow here, no_new_privs is never cleared right ? I
>> can't see the corresponding clear bit code for it.
>
> I believe that unsharing userns clears no_new_privs.

Seriously? That's kind of ... weird. I mean, I guess you're
priv-confined in a way, but that seems fragile.

-Kees

-- 
Kees Cook
Pixel Security