From e06b5b43133a3b38620376378f860d8eb3941d11 Mon Sep 17 00:00:00 2001
From: krw <krw@openbsd.org>
Date: Tue, 24 May 2022 17:29:02 +0000
Subject: [PATCH] fdisk(8) no longer uses the partition table it finds in
 /usr/mdec/mbr. Make the partition table all zeros and see if any hidden uses
 fall out.

ok deraadt@
---
 sys/arch/amd64/stand/mbr/mbr.S   | 6 +++---
 sys/arch/i386/stand/mbr/mbr.S    | 6 +++---
 sys/arch/landisk/stand/mbr/mbr.S | 6 +++---
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/sys/arch/amd64/stand/mbr/mbr.S b/sys/arch/amd64/stand/mbr/mbr.S
index 8a9a4d26b5e..2b00826dd0c 100644
--- a/sys/arch/amd64/stand/mbr/mbr.S
+++ b/sys/arch/amd64/stand/mbr/mbr.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbr.S,v 1.5 2012/06/04 16:17:04 mglocker Exp $	*/
+/*	$OpenBSD: mbr.S,v 1.6 2022/05/24 17:29:02 krw Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff and Tobias Weingartner
@@ -562,8 +562,8 @@ pt:
 	.long	0,0
 	.byte	0x0,0,0,0,0,0,0,0
 	.long	0,0
-	.byte	DOSACTIVE,0,1,0,DOSPTYP_OPENBSD,255,255,255
-	.long	0,0x7FFFFFFF
+	.byte	0x0,0,0,0,0,0,0,0
+	.long	0,0
 /* the last 2 bytes in the sector 0 contain the signature */
 	. = 0x1fe
 signature:
diff --git a/sys/arch/i386/stand/mbr/mbr.S b/sys/arch/i386/stand/mbr/mbr.S
index 66149ca6cd7..99ad02d1048 100644
--- a/sys/arch/i386/stand/mbr/mbr.S
+++ b/sys/arch/i386/stand/mbr/mbr.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbr.S,v 1.23 2012/06/04 16:17:04 mglocker Exp $	*/
+/*	$OpenBSD: mbr.S,v 1.24 2022/05/24 17:29:02 krw Exp $	*/
 
 /*
  * Copyright (c) 1997 Michael Shalayeff and Tobias Weingartner
@@ -562,8 +562,8 @@ pt:
 	.long	0,0
 	.byte	0x0,0,0,0,0,0,0,0
 	.long	0,0
-	.byte	DOSACTIVE,0,1,0,DOSPTYP_OPENBSD,255,255,255
-	.long	0,0x7FFFFFFF
+	.byte	0x0,0,0,0,0,0,0,0
+	.long	0,0
 /* the last 2 bytes in the sector 0 contain the signature */
 	. = 0x1fe
 signature:
diff --git a/sys/arch/landisk/stand/mbr/mbr.S b/sys/arch/landisk/stand/mbr/mbr.S
index 130da948972..4e5d1b6b8c4 100644
--- a/sys/arch/landisk/stand/mbr/mbr.S
+++ b/sys/arch/landisk/stand/mbr/mbr.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbr.S,v 1.1 2006/10/06 21:48:50 mickey Exp $	*/
+/*	$OpenBSD: mbr.S,v 1.2 2022/05/24 17:29:02 krw Exp $	*/
 /*	$NetBSD: mbr.S,v 1.1 2006/09/01 21:26:19 uwe Exp $	*/
 
 /*-
@@ -203,8 +203,8 @@ _pbr_part2:
 	.byte	0, 0, 0, 0, 0, 0, 0, 0	
 	.byte	0, 0, 0, 0, 0, 0, 0, 0
 _pbr_part3:
-	.byte	0x80, 0, 1, 0, 0xa6, 255, 255, 255	
-	.word	0, 0, 0xffff, 0x7fff
+	.byte	0, 0, 0, 0, 0, 0, 0, 0
+	.byte	0, 0, 0, 0, 0, 0, 0, 0
 
 	. = _C_LABEL(start) + 0x1fe
 magic:
-- 
2.20.1