[PATCH 4.14 030/496] KVM: s390: vsie: fix < 8k check for the itdba

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Hildenbrand <david@xxxxxxxxxx>

commit f4a551b72358facbbe5714248dff78404272feee upstream.

By missing an "L", we might detect some addresses to be <8k,
although they are not.

e.g. for itdba = 100001fff
!(gpa & ~0x1fffU) -> 1
!(gpa & ~0x1fffUL) -> 0

So we would report a SIE validity intercept although everything is fine.

Fixes: 166ecb3 ("KVM: s390: vsie: support transactional execution")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.8+
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/s390/kvm/vsie.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -590,7 +590,7 @@ static int pin_blocks(struct kvm_vcpu *v
 
 	gpa = READ_ONCE(scb_o->itdba) & ~0xffUL;
 	if (gpa && (scb_s->ecb & ECB_TE)) {
-		if (!(gpa & ~0x1fffU)) {
+		if (!(gpa & ~0x1fffUL)) {
 			rc = set_validity_icpt(scb_s, 0x0080U);
 			goto unpin;
 		}