Re: [PATCH 3/5] vhost: support upto 509 memory regions

Paolo Bonzini
2015-06-17T13:20:57Z

On 17/06/2015 15:13, Michael S. Tsirkin wrote:
> > > Considering userspace can be malicious, I guess yes.
> > I don't think it's a valid concern in this case,
> > setting limit back from 509 to 64 will not help here in any way,
> > userspace still can create as many vhost instances as it needs
> > to consume memory it desires.
>
> Not really since vhost char device isn't world-accessible.
> It's typically opened by a priveledged tool, the fd is
> then passed to an unpriveledged userspace, or permissions dropped.

Then what's the concern anyway?

Paolo