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Re: [Qemu-devel] Re: [PATCH] whitelist host virtio networking features [

From: Anthony Liguori
Subject: Re: [Qemu-devel] Re: [PATCH] whitelist host virtio networking features [was Re: qemu-kvm-0.11 regression, crashes on older ...]
Date: Mon, 02 Nov 2009 14:50:34 -0600
User-agent: Thunderbird (X11/20090825)

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

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.


Anthony Liguori


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