From 3e4f07eaba50fc223ab92ec2de859d8cc828dd18 Mon Sep 17 00:00:00 2001
From: krw <krw@openbsd.org>
Date: Fri, 21 May 2021 19:09:46 +0000
Subject: [PATCH] The protective MBR for GPT partitioning must be at sector 0.
 No EBR qualifies.

---
 sbin/fdisk/mbr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sbin/fdisk/mbr.c b/sbin/fdisk/mbr.c
index 16e21da15a1..f2b685980cd 100644
--- a/sbin/fdisk/mbr.c
+++ b/sbin/fdisk/mbr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbr.c,v 1.70 2021/05/14 21:11:15 krw Exp $	*/
+/*	$OpenBSD: mbr.c,v 1.71 2021/05/21 19:09:46 krw Exp $	*/
 
 /*
  * Copyright (c) 1997 Tobias Weingartner
@@ -42,6 +42,9 @@ MBR_protective_mbr(struct mbr *mbr)
 	struct dos_partition dp[NDOSPART], dos_partition;
 	int i;
 
+	if (mbr->offset != 0)
+		return (-1);
+
 	for (i = 0; i < NDOSPART; i++) {
 		PRT_make(&mbr->part[i], mbr->offset, mbr->reloffset,
 		    &dos_partition);
-- 
2.20.1