Description: KVM: cache incoherence issue in SEV API may lead to kernel crash
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2038940
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bb4ce2c65881a2b9bdcd384f54a260a12a89dd91
Notes:
 carnil> Need to isolate the required commits from the merge which are
 carnil> relevant for the CVE.
Bugs:
upstream:
5.10-upstream-stable:
4.19-upstream-stable:
4.9-upstream-stable:
sid:
5.10-bullseye-security:
4.19-buster-security:
4.9-stretch-security: