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,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 BE2A8C742BA for ; Fri, 12 Jul 2019 12:33:00 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 19557216E3 for ; Fri, 12 Jul 2019 12:32:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="fvwEbnpZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 19557216E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-16423-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 5558 invoked by uid 550); 12 Jul 2019 12:32:54 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 5539 invoked from network); 12 Jul 2019 12:32:53 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562934761; bh=m4atKtWxwNsdWMmPKBnGNNVfQ4ouO8QtM5/ynhUxPw0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fvwEbnpZOXvEAOAsvJ/Wju/4jtWe/q/M+lwTnYIzEuTqPkwhbFAONwccFfeZRbiSJ ND6gNYBdfUHaNYiHLLzZ6MsnPcWLTocQrse7DClDaKrwUQuf8UUIoySp9VPv48T/jK Z6Pzt+sijUsbQz04Bq6fORhqpudWof0Vp35VtkaQ= 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 5.2 22/61] Documentation/admin: Remove the vsyscall=native documentation Date: Fri, 12 Jul 2019 14:19:35 +0200 Message-Id: <20190712121621.837838383@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190712121620.632595223@linuxfoundation.org> References: <20190712121620.632595223@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 @@ -5102,12 +5102,6 @@ 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.