kernel: xen: off-by-one shift in x86_64 __addr_ok()

Off-by-one error in the addrok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service host crash via unspecified hypercalls that ignore virtual-address bits...

PT-2013-1400 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions 3.3 and earlier Description: The issue is related to an off-by-one error in the addr ok macro, which can be exploited by local 64-bit PV guest administrators to cause a denial of service, resulting in a host crash. This can be...