From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFB1DC742BC for ; Fri, 12 Jul 2019 12:41:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C9AB42080A for ; Fri, 12 Jul 2019 12:41:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562935313; bh=jz4QdF75ZQmZg10jBk1fPZWL3pu6t/6Ae9I3qsqqKOo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vW5nHM58/gHJrW0aPjVY1xjL0W2yahXPj3i0Jbav8gapyekzr0A2vMYeEjmx5nhYe tbDgxn616uBThC1Pr6ZBSZlSjDY8FJ1TRTzkSB9zi7Uqvz/9Aeirg3tYZjUP97VPcD iF3YO5eof7rjpQLGk+5bA4SH/b5497ri5+xGbzXk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727878AbfGLMXP (ORCPT ); Fri, 12 Jul 2019 08:23:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:58672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727877AbfGLMXO (ORCPT ); Fri, 12 Jul 2019 08:23:14 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 21B882084B; Fri, 12 Jul 2019 12:23:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562934193; bh=jz4QdF75ZQmZg10jBk1fPZWL3pu6t/6Ae9I3qsqqKOo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y6INyY1DsJqFxLyr2JowQv1MmEFa+sJMHR8DUj3BEm5QYa+QANO+GmMIOc3YyC+9z KB429YXsETSjo2VDiVswFDnsJCR4O7U2+2Ca7m1bmvHwQWNKdYGItaCAg44CZpC/WU yPic920XVuZVL8zFmziP0rgPt/IhubCWm7ycfL1k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Lutomirski , Thomas Gleixner , Kees Cook , Florian Weimer , Jann Horn , Borislav Petkov , Kernel Hardening , Peter Zijlstra Subject: [PATCH 4.19 66/91] Documentation/admin: Remove the vsyscall=native documentation Date: Fri, 12 Jul 2019 14:19:09 +0200 Message-Id: <20190712121625.381583411@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190712121621.422224300@linuxfoundation.org> References: <20190712121621.422224300@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andy Lutomirski commit d974ffcfb7447db5f29a4b662a3eaf99a4e1109e upstream. The vsyscall=native feature is gone -- remove the docs. Fixes: 076ca272a14c ("x86/vsyscall/64: Drop "native" vsyscalls") Signed-off-by: Andy Lutomirski Signed-off-by: Thomas Gleixner Acked-by: Kees Cook Cc: Florian Weimer Cc: Jann Horn Cc: stable@vger.kernel.org Cc: Borislav Petkov Cc: Kernel Hardening Cc: Peter Zijlstra Link: https://lkml.kernel.org/r/d77c7105eb4c57c1a95a95b6a5b8ba194a18e764.1561610354.git.luto@kernel.org Signed-off-by: Greg Kroah-Hartman --- Documentation/admin-guide/kernel-parameters.txt | 6 ------ 1 file changed, 6 deletions(-) --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4976,12 +4976,6 @@ emulate [default] Vsyscalls turn into traps and are emulated reasonably safely. - native Vsyscalls are native syscall instructions. - This is a little bit faster than trapping - and makes a few dynamic recompilers work - better than they would in emulation mode. - It also makes exploits much easier to write. - none Vsyscalls don't work at all. This makes them quite hard to use for exploits but might break your system.