xen: various flaws (#1685577)
grant table transfer issues on large hosts [XSA-284]
race with pass-through device hotplug [XSA-285]
x86: steal_page violates page_struct access discipline [XSA-287]
x86: Inconsistent PV IOMMU discipline [XSA-288]
missing preemption in x86 PV page table unvalidation [XSA-290]
x86/PV: page type reference counting issue with failed IOMMU update [XSA-291]
x86: insufficient TLB flushing when using PCID [XSA-292]
x86: PV kernel context switch corruption [XSA-293]
x86 shadow: Insufficient TLB flushing when using PCID [XSA-294]