Message-ID: <5581742C.9060100@redhat.com>
Date: Wed, 17 Jun 2015 15:20:44 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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To: "Michael S. Tsirkin" <mst@redhat.com>, Igor Mammedov <imammedo@redhat.com>
CC: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 3/5] vhost: support upto 509 memory regions
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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
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