[src/trunk]: src/sys/arch/i386/conf Disable svr4 and ibcs2 by default.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/90dddd739901
branches:  trunk
changeset: 825690:90dddd739901
user:      maxv <maxv%NetBSD.org@localhost>
date:      Fri Jul 28 14:13:13 2017 +0000

description:
Disable svr4 and ibcs2 by default.

These options are not well-tested, of a limited use case, and the potential
for damage is too high. Vulnerabilities were presented at DEFCON 25 - I see
that at least one of them can be exploited to get ring0 privileges.

diffstat:

 sys/arch/i386/conf/GENERIC   |  8 ++++----
 sys/arch/i386/conf/XEN3_DOM0 |  6 +++---
 sys/arch/i386/conf/XEN3_DOMU |  6 +++---
 3 files changed, 10 insertions(+), 10 deletions(-)

diffs (69 lines):

diff -r ce26ac5f3259 -r 90dddd739901 sys/arch/i386/conf/GENERIC
--- a/sys/arch/i386/conf/GENERIC        Fri Jul 28 14:13:11 2017 +0000
+++ b/sys/arch/i386/conf/GENERIC        Fri Jul 28 14:13:13 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.1158 2017/07/28 13:59:07 maxv Exp $
+# $NetBSD: GENERIC,v 1.1159 2017/07/28 14:13:13 maxv Exp $
 #
 # GENERIC machine description file
 #
@@ -22,7 +22,7 @@
 
 options        INCLUDE_CONFIG_FILE     # embed config file in kernel binary
 
-#ident         "GENERIC-$Revision: 1.1158 $"
+#ident         "GENERIC-$Revision: 1.1159 $"
 
 maxusers       64              # estimated number of users
 
@@ -144,8 +144,8 @@
 #options       TCP_COMPAT_42   # 4.2BSD TCP/IP bug compat. Not recommended.
 
 options        COMPAT_OSSAUDIO # OSS (Voxware) audio driver compatibility
-options        COMPAT_SVR4     # binary compatibility with SVR4
-options        COMPAT_IBCS2    # binary compatibility with SCO and ISC
+#options       COMPAT_SVR4     # binary compatibility with SVR4
+#options       COMPAT_IBCS2    # binary compatibility with SCO and ISC
 options        COMPAT_LINUX    # binary compatibility with Linux
 #options       COMPAT_FREEBSD  # binary compatibility with FreeBSD
 #options       COMPAT_NDIS     # NDIS network driver
diff -r ce26ac5f3259 -r 90dddd739901 sys/arch/i386/conf/XEN3_DOM0
--- a/sys/arch/i386/conf/XEN3_DOM0      Fri Jul 28 14:13:11 2017 +0000
+++ b/sys/arch/i386/conf/XEN3_DOM0      Fri Jul 28 14:13:13 2017 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: XEN3_DOM0,v 1.113 2017/06/22 18:14:32 khorben Exp $
+#      $NetBSD: XEN3_DOM0,v 1.114 2017/07/28 14:13:13 maxv Exp $
 #
 #      XEN3_0: Xen 3.0 domain0 kernel
 
@@ -97,8 +97,8 @@
 #options       TCP_COMPAT_42   # 4.2BSD TCP/IP bug compat. Not recommended.
 
 options        COMPAT_OSSAUDIO # OSS (Voxware) audio driver compatibility
-options        COMPAT_SVR4     # binary compatibility with SVR4
-options        COMPAT_IBCS2    # binary compatibility with SCO and ISC
+#options       COMPAT_SVR4     # binary compatibility with SVR4
+#options       COMPAT_IBCS2    # binary compatibility with SCO and ISC
 options        COMPAT_LINUX    # binary compatibility with Linux
 #options       COMPAT_FREEBSD  # binary compatibility with FreeBSD
 options        COMPAT_BSDPTY   # /dev/[pt]ty?? ptys.
diff -r ce26ac5f3259 -r 90dddd739901 sys/arch/i386/conf/XEN3_DOMU
--- a/sys/arch/i386/conf/XEN3_DOMU      Fri Jul 28 14:13:11 2017 +0000
+++ b/sys/arch/i386/conf/XEN3_DOMU      Fri Jul 28 14:13:13 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: XEN3_DOMU,v 1.77 2017/05/21 06:19:37 pgoyette Exp $
+# $NetBSD: XEN3_DOMU,v 1.78 2017/07/28 14:13:13 maxv Exp $
 
 include        "arch/xen/conf/std.xen"
 
@@ -81,8 +81,8 @@
 #options       TCP_COMPAT_42   # 4.2BSD TCP/IP bug compat. Not recommended.
 
 options        COMPAT_OSSAUDIO # OSS (Voxware) audio driver compatibility
-options        COMPAT_SVR4     # binary compatibility with SVR4
-options        COMPAT_IBCS2    # binary compatibility with SCO and ISC
+#options       COMPAT_SVR4     # binary compatibility with SVR4
+#options       COMPAT_IBCS2    # binary compatibility with SCO and ISC
 options        COMPAT_LINUX    # binary compatibility with Linux
 #options       COMPAT_FREEBSD  # binary compatibility with FreeBSD
 options        COMPAT_BSDPTY   # /dev/[pt]ty?? ptys.