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

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Date:	Tue, 07 Feb 2012 15:18:21 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Anthony Liguori <anthony@...emonkey.ws>
CC:	Scott Wood <scottwood@...escale.com>,
	Eric Northup <digitaleric@...gle.com>,
	qemu-devel <qemu-devel@...gnu.org>,
	KVM list <kvm@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [Qemu-devel] [RFC] Next gen kvm api

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?

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

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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