libvirt users - Oct 2011 - general protection and other errors

Hi,
I'm having a problem with a fedora15 x86_64 host with a fedora15
x86_64 guest on a Xeon E3-1240 with 8GB RAM on the guest. This is the
only guest. The server is configured as a mail server, using
spamassassin, postfix, amavisd, and clamav.

It was previously running without error on different hardware. I
migrated the disks to a more powerful server due to load. It's a new
server, and has been stress tested with memtest86, mprime, and
passmark's Linux test for more than 24 hours without producing a
problem.

However, when I run the kvm vm, I receive a bunch of errors similar to
these on the guest:

[169245.360511] clamscan[27448] general protection ip:7f125f2e6ffb
sp:7fff117566f0 error:0 in libclamav.so.6.1.11[7f125f229000+9ce000]

[29016.445470] clamd[1110] general protection ip:30df2c3981
sp:7fffa08f4fe0 error:0 in libclamav.so.6.1
.11[30df200000+9ce000]

There are other applications, such as pyzor, that produce similar errors.

Is this something that could be a result of some software
configuration error I've made? Is there something I can do to debug
this further? There also aren't any errors on the host indicating a
kernel problem or hardware issue.

Is it possible this is a known error?

I was previously trying to improve IO performance by using 'block'
instead of 'file' for the device, but had to abandon that idea because
it didn't work and I had to concentrate on this problem.

Could disabling the cache (cache=none) cause this?

I've included some info below, in hopes someone could guide me towards
a solution.

# rpm -qva|egrep 'kvm|libvirt|kernel|qemu'
libvirt-python-0.8.8-7.fc15.x86_64
kernel-2.6.40.6-0.fc15.x86_64
qemu-img-0.14.0-8.fc15.x86_64
gpxe-roms-qemu-1.0.1-4.fc15.noarch
kernel-2.6.40.4-5.fc15.x86_64
qemu-system-x86-0.14.0-8.fc15.x86_64
libvirt-0.8.8-7.fc15.x86_64
libvirt-client-0.8.8-7.fc15.x86_64
qemu-common-0.14.0-8.fc15.x86_64
kernel-headers-2.6.40.6-0.fc15.x86_64
qemu-kvm-0.14.0-8.fc15.x86_64

I've included my domain config below in hopes it helps.

<domain type='kvm'>
  <name>mail02</name>
  <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid>
  <memory>6291456</memory>
  <currentMemory>6291456</currentMemory>
  <vcpu>4</vcpu>
  <os>
    <type arch='x86_64' machine='pc-0.14'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'
cache='none'/>
      <source file='/var/lib/libvirt/images/mail02.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x0'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='1'
unit='0'/>
    </disk>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x01'
function='0x1'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:67:2c:4c'/>
      <source bridge='br0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1'
autoport='yes'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x02'
function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0'/>
    </memballoon>
  </devices>
</domain>

Thanks,
Alex