6 security fixes
VCPUOP_initialise DoS [XSA-296, CVE-2019-18420]
missing descriptor table limit checking in x86 PV emulation [XSA-298,
CVE-2019-18425]
Issues with restartable PV type change operations [XSA-299, CVE-2019-18421]
add-to-physmap can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423]
passed through PCI devices may corrupt host memory after deassignment
[XSA-302, CVE-2019-18424]
ARM: Interrupts are unconditionally unmasked in exception handlers
[XSA-303, CVE-2019-18422]