KVM: SVM: Unload guest fpu on vcpu_put()

Not unloading the guest fpu can cause fpu leaks from guest to guest (or host
to guest).

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 7a6eead..4e04e49 100644 (file)
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -663,6 +663,7 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
                wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 
        rdtscll(vcpu->host_tsc);
+       kvm_put_guest_fpu(vcpu);
 }
 
 static void svm_vcpu_decache(struct kvm_vcpu *vcpu)