Grygorii Strashko

Xenstore, to have an up-to-date picture of the entire system, wants to know of domains appearing and disappearing. To make this more robust, a new XEN DOMCTL get domain state was introduced. The management of the bitmap underlying that operation is tied into the binding of the VIRQ DOM EXC virtual IRQ. Unfortunately an error path there would tear down the bitmap even in cases when it wasn't set up. Unprivileged domains can trigger that error path.