Hi,

I just joined this list and am referring to
  https://lists.xenproject.org/archives/html/xen-devel/2018-12/msg00938.html

We have experienced several crashes of a recent Debian 9 Dom0 on new
hardware with Xen version "4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10".
After reporting it within Debian bug #912975
(https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=912975) it was
pointed out, that this would be the same error, and I was asked to join
discussion here.

Unfortunately we are unable to reliably reproduce the behaviour.
Currently we are running the Dom0 with Xen version
"4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9" to test the assumption, that a
bug was introduced between these versions. We have not yet tried setting
pcid=0. Please let me know, if you think, that this would be a more
reasonable test for now.

Best Regards,
Patrick Beckmann