#define INVALID_SYNC_FIELD 0x80000000
/*
+ * Set an exception as pending *and* injected while KVM is processing events.
+ * KVM is supposed to ignore/drop pending exceptions if userspace is also
+ * requesting that an exception be injected.
+ */
+static void *race_events_inj_pen(void *arg)
+{
+ struct kvm_run *run = (struct kvm_run *)arg;
+ struct kvm_vcpu_events *events = &run->s.regs.events;
+
+ for (;;) {
+ WRITE_ONCE(run->kvm_dirty_regs, KVM_SYNC_X86_EVENTS);
+ WRITE_ONCE(events->flags, 0);
+ WRITE_ONCE(events->exception.injected, 1);
+ WRITE_ONCE(events->exception.pending, 1);
+
+ pthread_testcancel();
+ }
+
+ return NULL;
+}
+
+/*
* Set an invalid exception vector while KVM is processing events. KVM is
* supposed to reject any vector >= 32, as well as NMIs (vector 2).
*/
race_sync_regs(race_sregs_cr4);
race_sync_regs(race_events_exc);
+ race_sync_regs(race_events_inj_pen);
return 0;
}