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[PATCH 0/1] Fix for a buggy XSA-321 resolution in Xen 4.9

Hello all,

I found a bug in Xen 4.9 involving what I think is an incorrectly backported
patch for XSA-321. I realize that Xen 4.9 no longer receives security support,
but as a Qubes OS 4.0 user, I still rely on Xen 4.8, and this bug affects me

I would really appreciate it if anyone could review the following patch in this
e-mail thread. I am mainly looking for a confirmation as to whether the patch
fixes the buggy backport in an acceptable manner. The description of the patch
is very (and possibly too) detailed and should have all of the necessary

Thank you in advance,


M. Vefa Bicakci (1):
  x86/ept: Fix buggy XSA-321 backport

 xen/arch/x86/mm/p2m-ept.c | 57 +++++++++++++++++++--------------------
 1 file changed, 28 insertions(+), 29 deletions(-)

base-commit: 4597fc97b3b8870c39214e3aa4132ab711a40691



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