Re: [Qemu-devel] Re: [PATCH] whitelist host virtio networking features [was Re: qemu-kvm-0.11 regression, crashes on older ...]

[Anthony Liguori]

Dustin Kirkland wrote:
> On Mon, 2009-11-02 at 12:55 -0600, Anthony Liguori wrote:
>   
> > They can exit qemu via an ACPI shutdown.  I don't see the difference.
> >     
>
> An ACPI shutdown is triggered by an authenticated user inside of the
> guest.
>
> The present exit is triggered by any other anonymous user on the
> network, with the ability to send a lot of packets very quickly to the
> VM guest.  The guest isn't able to handle this properly (and rightly
> that guest's kernel should be fixed).  But I do see a difference.
>   

Well the problem is triggered by the guest kernel writing garbage to 
virtio-net's backend.  That's why we're suggesting it's really a guest 
kernel issue.

If the guest kernel writes something bad to qemu, we're may kill the 
guest.  That's not a qemu bug, it's the designed behavior.

Regards,

Anthony Liguori

> :-Dustin
>