commit 326cf0334bacfdf43039cf75997a022b9e51535d
author Alex Williamson <alex.williamson@redhat.com> Fri Jun 29 09:56:24 2012 -0600
committer Marcelo Tosatti <mtosatti@redhat.com> Mon Jul 02 21:10:30 2012 -0300
tree 568fc99ad9bdde8fa382ff6657568c2e2ec2e4fc
parent f36992e31284131a978d07bb14e582ce67b46b64

KVM: Sanitize KVM_IRQFD flags

We only know of one so far.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

virt/kvm/eventfd.c

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index c307c24..7d7e2aa 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -340,6 +340,9 @@
 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);