linux-kernel - Re: [Qemu-devel] [RFC] Next gen kvm api

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Date:	Tue, 07 Feb 2012 09:15:12 -0600
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Avi Kivity <avi@...hat.com>
CC:	Scott Wood <scottwood@...escale.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Eric Northup <digitaleric@...gle.com>,
	KVM list <kvm@...r.kernel.org>,
	qemu-devel <qemu-devel@...gnu.org>,
	Chris Wright <chrisw@...hat.com>
Subject: Re: [Qemu-devel] [RFC] Next gen kvm api

On 02/07/2012 07:18 AM, Avi Kivity wrote:
> On 02/07/2012 02:51 PM, Anthony Liguori wrote:
>> On 02/07/2012 06:40 AM, Avi Kivity wrote:
>>> On 02/07/2012 02:28 PM, Anthony Liguori wrote:
>>>>
>>>>> It's a potential source of exploits
>>>>> (from bugs in KVM or in hardware). I can see people wanting to be
>>>>> selective with access because of that.
>>>>
>>>> As is true of the rest of the kernel.
>>>>
>>>> If you want finer grain access control, that's exactly why we have things like
>>>> LSM and SELinux. You can add the appropriate LSM hooks into the KVM
>>>> infrastructure and setup default SELinux policies appropriately.
>>>
>>> LSMs protect objects, not syscalls. There isn't an object to protect here
>>> (except the fake /dev/kvm object).
>>
>> A VM can be an object.
>>
>
> Not really, it's not accessible in a namespace. How would you label it?

Labels can originate from userspace, IIUC, so I think it's possible for QEMU (or 
whatever the userspace is) to set the label for the VM while it's creating it. 
I think this is how most of the labeling for X and things of that nature works.

Maybe Chris can set me straight.

> Maybe we can reuse the process label/context (not sure what the right term is
> for a process).

Regards,

Anthony Liguori

>

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