Re: [RFC] Unify KVM kernel-space and user-space code into a single project

Joerg Roedel
2010-03-24T16:31:21Z

On Wed, Mar 24, 2010 at 06:20:38PM +0200, Avi Kivity wrote:
> On 03/24/2010 06:17 PM, Joerg Roedel wrote:
>> But is this not only one entity more for
>> sVirt to handle? I would leave that decision to the sVirt developers.
>> Does attaching the same label as for the VM resources mean that root
>> could not access it anymore?
>>
>
> IIUC processes run under a context, and there's a policy somewhere that
> tells you which context can access which label (and with what
> permissions). There was a server on the Internet once that gave you
> root access and invited you to attack it. No idea if anyone succeeded
> or not (I got bored after about a minute).
>
> So it depends on the policy. If you attach the same label, that means
> all files with the same label have the same access permissions. I think.

So if this is true we can introduce a 'trace' label and add all contexts
that should be allowed to trace to it.
But we probably should leave the details to the security experts ;-)

Joerg