From patchwork Wed Feb 17 22:31:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu-cheng Yu X-Patchwork-Id: 12092555 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 F1627C433E6 for ; Wed, 17 Feb 2021 22:31:50 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7EA6D64EB6 for ; Wed, 17 Feb 2021 22:31:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EA6D64EB6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C9F556B006C; Wed, 17 Feb 2021 17:31:49 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BD1116B006E; Wed, 17 Feb 2021 17:31:49 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC3806B0070; Wed, 17 Feb 2021 17:31:49 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0227.hostedemail.com [216.40.44.227]) by kanga.kvack.org (Postfix) with ESMTP id 96E096B006C for ; Wed, 17 Feb 2021 17:31:49 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 61AFF8249980 for ; Wed, 17 Feb 2021 22:31:49 +0000 (UTC) X-FDA: 77829208338.16.01357E4 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by imf10.hostedemail.com (Postfix) with ESMTP id 9C3C5407F8ED for ; Wed, 17 Feb 2021 22:31:45 +0000 (UTC) IronPort-SDR: Wv5OTwf1ss3XxOR31lL3DmPuO1sySXpfXvBZRCimTPWXCGz9QWZRnC5Aqzaf/UkBwHY4qbhWD8 Gv/VNYSiAS5A== X-IronPort-AV: E=McAfee;i="6000,8403,9898"; a="179825702" X-IronPort-AV: E=Sophos;i="5.81,185,1610438400"; d="scan'208";a="179825702" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2021 14:31:46 -0800 IronPort-SDR: kw1HrdNyLDd75O4PiZLQx7EPT6vTVbFEPiCxaxLTittvU8btPnqgcVALK/Yaa7aGpKcVLvJ+kk iObrai7tz7bg== X-IronPort-AV: E=Sophos;i="5.81,185,1610438400"; d="scan'208";a="362200458" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2021 14:31:45 -0800 From: Yu-cheng Yu To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu , Haitao Huang Cc: Yu-cheng Yu Subject: [PATCH v21 1/7] x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking Date: Wed, 17 Feb 2021 14:31:29 -0800 Message-Id: <20210217223135.16790-2-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210217223135.16790-1-yu-cheng.yu@intel.com> References: <20210217223135.16790-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 X-Stat-Signature: 5aod51jjba8t4jigw5yon86kcn6sy6rt X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9C3C5407F8ED Received-SPF: none (intel.com>: No applicable sender policy available) receiver=imf10; identity=mailfrom; envelope-from=""; helo=mga11.intel.com; client-ip=192.55.52.93 X-HE-DKIM-Result: none/none X-HE-Tag: 1613601105-670848 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Indirect branch tracking is a hardware security feature that verifies near indirect call/jump instructions arrive at intended targets, which are labeled by the compiler with ENDBR opcodes. If such instructions reach unlabeled locations, the processor raises control-protection faults. Check the compiler is up-to-date at config time. Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index cafa4a2c1d2d..5e157031bf82 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1963,6 +1963,7 @@ config X86_CET def_bool n depends on AS_WRUSS depends on ARCH_HAS_SHADOW_STACK + depends on $(cc-option,-fcf-protection) select ARCH_USES_HIGH_VMA_FLAGS select ARCH_MAYBE_MKWRITE select ARCH_USE_GNU_PROPERTY