ACK: [SRU Bionic,Focal,Focal/oem-5.6] CVE-2020-12888

[William Breathitt Gray]

On Tue, Aug 25, 2020 at 06:35:14PM -0300, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> Guests may cause DoS on the host when the latter freezes/reboots when
> writing to disabled PCI devices.
> 
> [Test case]
> Launch a VM with libvirt, and do a passthrough of a host PCI device (configured
> using virt-manager, by adding a host device). On x86-64, the host must be
> booted with intel_iommu=on on Intel machines.
> 
> Only smoke tested that passthrough still works on 4.15, as this one had the
> most changes during backport. Build tested 5.4 and 5.6 kernels.
> 
> [Potential regression]
> Break PCI passthrough or other uses of VFIO.

Acked-by: William Breathitt Gray <william.gray at canonical.com>
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