Re: [Qemu-devel] [PATCH 0/4] net-bridge: rootless bridge support for qemu

[Anthony Liguori]

Avi Kivity wrote:
> On 11/05/2009 04:33 PM, Avi Kivity wrote:
> > and concerned that we're loosening security for qemu non-users.
>
> I see you've addressed this via an acl system.  Still, this is IMO 
> should be outside qemu, esp. as security is now much more than 
> users/groups (i.e. selinux and friends).

Actually, I think this model is pretty close to what the latest crazes 
are in the security world.  The model you're advocating (privileged 
process handing over a fd) is not as secure because it requires that the 
management daemon runs as a privileged user.  There's nothing about this 
that prevents the use of a management framework.  In fact, had this 
existed when libvirt was first written, I'd hope libvirt would have used 
this mechanism instead of fd inheritance.

Management software is really just another user.  We really want 
management software to run unprivileged as much as possible.

--
Regards,

Anthony Liguori