From 7c003dab436db33aac674ad66eed49add83b595b Mon Sep 17 00:00:00 2001
From: Alexander Gordeev <agordeev@linux.ibm.com>
Date: Mon, 17 May 2021 08:18:11 +0200
Subject: [PATCH] s390/mcck: fix calculation of SIE critical section size

commit 5bcbe3285fb614c49db6b238253f7daff7e66312 upstream.

The size of SIE critical section is calculated wrongly
as result of a missed subtraction in commit 0b0ed657fe00
("s390: remove critical section cleanup from entry.S")

Fixes: 0b0ed657fe00 ("s390: remove critical section cleanup from entry.S")
Cc: <stable@vger.kernel.org>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/s390/kernel/entry.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 81c458e996d9..963e8cb936e2 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -1284,7 +1284,7 @@ ENDPROC(stack_overflow)
 	je	1f
 	larl	%r13,.Lsie_entry
 	slgr	%r9,%r13
-	larl	%r13,.Lsie_skip
+	lghi	%r13,.Lsie_skip - .Lsie_entry
 	clgr	%r9,%r13
 	jh	1f
 	oi	__LC_CPU_FLAGS+7, _CIF_MCCK_GUEST