From: Alex Williamson <alex.williamson@redhat.com>
Date: Fri, 29 Jun 2012 15:56:24 +0000 (-0600)
Subject: KVM: Sanitize KVM_IRQFD flags
X-Git-Tag: v3.5-rc6~12^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=326cf0334bacfdf43039cf75997a022b9e51535d;p=pandora-kernel.git

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>
---

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index c307c24c147a..7d7e2aaffece 100644
--- 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);