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[2620:137:e000::1:20]) by mx.google.com with ESMTP id z41-20020a056a001da900b0056362152f8fsi14867319pfw.253.2023.01.11.11.43.10; Wed, 11 Jan 2023 11:43:22 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=g4jrhCCr; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229623AbjAKTdL (ORCPT + 99 others); Wed, 11 Jan 2023 14:33:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229701AbjAKTdH (ORCPT ); Wed, 11 Jan 2023 14:33:07 -0500 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA23216498; Wed, 11 Jan 2023 11:33:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1673465585; x=1705001585; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=0cOJw84V6/UKZ6A9b4jwVD33YpuY7WN9o7pXNfDH4kA=; b=g4jrhCCrTFyqHGZ1lB6RWLacwiOMPgxrBM9E82FXFf0cFB77dHq/x7zW CNlTw/vi7LCz422hii6IGu5QW6JVgtzwiIWnzqYinthi6rm500ZMo8cIu MvtCTqmle1apV8AbRCm/gWuZXaCpLDSqq7MsShfYFtdIS9b6MppR0x1Op Qgezj6dMi+0hffhnFhw2cHKX9FQZd+PWqwpS/oh9fWp6ZnxZG0/CwIGW1 BxXg3EIjfkTVBv/vVRtCaK6NMnyJTGE3nHrMz2Iy5ofhiM8b9et8dxWlB UWRWUrBJptKHvDtx4i9qPnzi50NgSOgYO/TSHQmj0uoX++h6wtthrzuGu w==; X-IronPort-AV: E=McAfee;i="6500,9779,10586"; a="385828038" X-IronPort-AV: E=Sophos;i="5.96,317,1665471600"; d="scan'208";a="385828038" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2023 11:33:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10586"; a="746281835" X-IronPort-AV: E=Sophos;i="5.96,317,1665471600"; d="scan'208";a="746281835" Received: from sohilmeh.sc.intel.com ([172.25.103.65]) by FMSMGA003.fm.intel.com with ESMTP; 11 Jan 2023 11:33:04 -0800 From: Sohil Mehta To: Jonathan Corbet , linux-doc@vger.kernel.org Cc: Sohil Mehta , Andy Lutomirski , Thomas Gleixner , Kees Cook , Tony Luck , Ravi V Shankar , linux-kernel@vger.kernel.org, x86@kernel.org Subject: [PATCH] x86/vsyscall: Fix documentation to reflect the default mode Date: Wed, 11 Jan 2023 19:32:11 +0000 Message-Id: <20230111193211.1987047-1-sohil.mehta@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754756496928057084?= X-GMAIL-MSGID: =?utf-8?q?1754756496928057084?= The default vsyscall mode has been updated from emulate to xonly for a while. Update the kernel-parameters doc to reflect that. Fixes: 625b7b7f79c6 ("x86/vsyscall: Change the default vsyscall mode to xonly") Cc: Andy Lutomirski Signed-off-by: Sohil Mehta Reviewed-by: Tony Luck Reviewed-by: Kees Cook --- Do documentation fixes typically get backported to stable? I haven't included a stable cc assuming they do not. Documentation/admin-guide/kernel-parameters.txt | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 6cfa6e3996cf..87f0b645922c 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6756,11 +6756,11 @@ functions are at fixed addresses, they make nice targets for exploits that can control RIP. - emulate [default] Vsyscalls turn into traps and are - emulated reasonably safely. The vsyscall - page is readable. + emulate Vsyscalls turn into traps and are emulated + reasonably safely. The vsyscall page is + readable. - xonly Vsyscalls turn into traps and are + xonly [default] Vsyscalls turn into traps and are emulated reasonably safely. The vsyscall page is not readable.