KVM: Sanitize KVM_IRQFD flags

We only know of one so far. Signed-off-by: Alex Williamson <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
svenkatr · Jul 3, 2012 · 326cf03 · 326cf03
1 parent f36992e
commit 326cf03
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
@@ -340,6 +340,9 @@ kvm_irqfd_deassign(struct kvm *kvm, struct kvm_irqfd *args)
 int
 kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 {
+	if (args->flags & ~KVM_IRQFD_FLAG_DEASSIGN)
+		return -EINVAL;
+
 	if (args->flags & KVM_IRQFD_FLAG_DEASSIGN)
 		return kvm_irqfd_deassign(kvm, args);