All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Florian Weimer <fweimer@redhat.com>, Jann Horn <jannh@google.com>,
	Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
	Kernel Hardening <kernel-hardening@lists.openwall.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH v2 6/8] x86/vsyscall: Change the default vsyscall mode to xonly
Date: Wed, 26 Jun 2019 21:45:07 -0700	[thread overview]
Message-ID: <30539f8072d2376b9c9efcc07e6ed0d6bf20e882.1561610354.git.luto@kernel.org> (raw)
In-Reply-To: <cover.1561610354.git.luto@kernel.org>

The use case for full emulation over xonly is very esoteric.  Let's
change the default to the safer xonly mode.

Cc: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Kernel Hardening <kernel-hardening@lists.openwall.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0182d2c67590..32028edc1b0e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2285,7 +2285,7 @@ config COMPAT_VDSO
 choice
 	prompt "vsyscall table for legacy applications"
 	depends on X86_64
-	default LEGACY_VSYSCALL_EMULATE
+	default LEGACY_VSYSCALL_XONLY
 	help
 	  Legacy user code that does not know how to find the vDSO expects
 	  to be able to issue three syscalls by calling fixed addresses in
-- 
2.21.0


  parent reply	other threads:[~2019-06-27  4:45 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-27  4:45 [PATCH v2 0/8] vsyscall xonly mode Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 1/8] x86/vsyscall: Remove the vsyscall=native documentation Andy Lutomirski
2019-06-27 17:26   ` Kees Cook
2019-06-27 22:13   ` [tip:x86/entry] Documentation/admin: " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 2/8] x86/vsyscall: Add a new vsyscall=xonly mode Andy Lutomirski
2019-06-27 17:26   ` Kees Cook
2019-06-27 22:13   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 3/8] x86/vsyscall: Show something useful on a read fault Andy Lutomirski
2019-06-27 17:28   ` Kees Cook
2019-06-27 22:14   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 4/8] x86/vsyscall: Document odd SIGSEGV error code for vsyscalls Andy Lutomirski
2019-06-27 17:28   ` Kees Cook
2019-06-27 22:15   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 5/8] selftests/x86/vsyscall: Verify that vsyscall=none blocks execution Andy Lutomirski
2019-06-27 17:29   ` Kees Cook
2019-06-27 22:16   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` Andy Lutomirski [this message]
2019-06-27 17:30   ` [PATCH v2 6/8] x86/vsyscall: Change the default vsyscall mode to xonly Kees Cook
2019-06-27 22:16   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 7/8] x86/vsyscall: Add __ro_after_init to global variables Andy Lutomirski
2019-06-27 17:30   ` Kees Cook
2019-06-27 22:17   ` [tip:x86/entry] " tip-bot for Andy Lutomirski
2019-06-27  4:45 ` [PATCH v2 8/8] selftests/x86: Add a test for process_vm_readv() on the vsyscall page Andy Lutomirski
2019-06-27 17:30   ` Kees Cook
2019-06-27 22:18   ` [tip:x86/entry] " tip-bot for Andy Lutomirski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=30539f8072d2376b9c9efcc07e6ed0d6bf20e882.1561610354.git.luto@kernel.org \
    --to=luto@kernel.org \
    --cc=bp@alien8.de \
    --cc=fweimer@redhat.com \
    --cc=jannh@google.com \
    --cc=keescook@chromium.org \
    --cc=kernel-hardening@lists.openwall.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.