Re: [PATCH 2/2] sysctl: allow CLONE_NEWUSER to be disabled

[Kees Cook]

On Fri, Jan 22, 2016 at 2:55 PM, Robert ÅwiÄcki <robert@xxxxxxxxxxx> wrote:
> 2016-01-22 23:50 GMT+01:00 Kees Cook <keescook@xxxxxxxxxxxx>:
>
>>> Seems that Debian and some older Ubuntu versions are already using
>>>
>>> $ sysctl -a | grep usern
>>> kernel.unprivileged_userns_clone = 0
>>>
>>> Shall we be consistent wit it?
>>
>> Oh! I didn't see that on systems I checked. On which version did you find that?
>
> $ uname -a
> Linux bc1 4.3.0-0.bpo.1-amd64 #1 SMP Debian 4.3.3-5~bpo8+1
> (2016-01-07) x86_64 GNU/Linux
> $ cat /etc/debian_version
> 8.2

Ah-ha, Debian only, though it looks like this was just committed to
the Ubuntu kernel tree too:


> IIRC some older kernels delivered with Ubuntu Precise were also using
> it (but maybe I'm mistaken)

I don't see it there.

I think my patch is more complete, but I'm happy to change the name if
this sysctl has already started to enter the global consciousness. ;)

Serge, Ben, what do you think?

-Kees


-- 
Kees Cook
Chrome OS & Brillo Security