Re: [CRIU] Introspecting userns relationships to other namespaces?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> writes:

> On July 8, 2016 1:38:19 PM PDT, Andrew Vagin <avagin@xxxxxxxxxxxxx> wrote:

>>What do you think about the idea to mount nsfs and be able to look up
>>any alive namespace by inum:
>
> I think I like it.  It will give us a way to enter any extant
> namespace.  It will work for Eric's fs namespaces as well.  Perhaps a
> /process/ns/<inum> Directory?

*Shivers*

That makes it very easy to bypass any existing controls that exist for
getting at namespaces.  It is true that everything of that kind is
directory based but still.

Plus I think it would serve as information leak to information outside
of the container.

An operation to get a user namespace file descriptor from some kernel
object sounds reasonably sane.

A great big list of things sounds about as scary as it can get.  This is
not the time to be making it easier to escape from containers.

Eric
_______________________________________________
Containers mailing list
Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/containers



[Index of Archives]     [Cgroups]     [Netdev]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux