KVM: s390: Sanitize fpc registers for KVM_SET_FPU

commit 7eef87d (KVM: s390: fix register setting) added a load of the floating point control register to the KVM_SET_FPU path. Lets make sure that the fpc is valid. Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
wangbin579 · Mar 8, 2012 · 8517558 · 8517558
1 parent 6dbf79e
commit 8517558
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
@@ -460,7 +460,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
 	memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
-	vcpu->arch.guest_fpregs.fpc = fpu->fpc;
+	vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK;
 	restore_fp_regs(&vcpu->arch.guest_fpregs);
 	return 0;
 }