KVM: s390: vsie: fix riccbd

We store the address of riccbd at the wrong location, overwriting
gvrd. This means that our nested guest will not be able to use runtime
instrumentation. Also, a memory leak, if our KVM guest actually sets gvrd.

Not noticed until now, as KVM guests never make use of gvrd and runtime
instrumentation wasn't completely tested yet.
Reported-by: Fan Zhang <zhangfan@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

arch/s390/kvm/vsie.c

@@ -584,7 +584,7 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
 		/* Validity 0x0044 will be checked by SIE */
 		if (rc)
 			goto unpin;
-		scb_s->gvrd = hpa;
+		scb_s->riccbd = hpa;
 	}
 	return 0;
 unpin: