From patchwork Wed Feb 10 18:02:39 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: 12081551 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=-16.8 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 B75ACC433DB for ; Wed, 10 Feb 2021 18:03:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5976364EDC for ; Wed, 10 Feb 2021 18:03:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5976364EDC 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 E09E36B0071; Wed, 10 Feb 2021 13:03:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D6BE96B0073; Wed, 10 Feb 2021 13:03:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AD5096B0072; Wed, 10 Feb 2021 13:03:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0043.hostedemail.com [216.40.44.43]) by kanga.kvack.org (Postfix) with ESMTP id 759D46B006E for ; Wed, 10 Feb 2021 13:03:05 -0500 (EST) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 38108AF8A for ; Wed, 10 Feb 2021 18:03:05 +0000 (UTC) X-FDA: 77803129530.22.fold44_4a086fe27612 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin22.hostedemail.com (Postfix) with ESMTP id 10E5B181A4014 for ; Wed, 10 Feb 2021 18:03:05 +0000 (UTC) X-HE-Tag: fold44_4a086fe27612 X-Filterd-Recvd-Size: 3535 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Wed, 10 Feb 2021 18:03:04 +0000 (UTC) IronPort-SDR: pPH86dtAkDOCm7A1sQhvh819MP1SqpaNaa0gfI9wLlSDV9JXnESOZbRuR6DGndWY5x9T5s6kDA puKpjIC0mVsQ== X-IronPort-AV: E=McAfee;i="6000,8403,9891"; a="201237621" X-IronPort-AV: E=Sophos;i="5.81,168,1610438400"; d="scan'208";a="201237621" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Feb 2021 10:03:01 -0800 IronPort-SDR: DZIyilyq6rAx+vBuMXR52Ljop2B68etNnmpU4O2n2DF5wh4aWDx9zN3kX28Ey7PzADJAvZJRUI woeiMmefRb5Q== X-IronPort-AV: E=Sophos;i="5.81,168,1610438400"; d="scan'208";a="380239198" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Feb 2021 10:02:56 -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 , Cc: Yu-cheng Yu Subject: [PATCH v20 1/7] x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking Date: Wed, 10 Feb 2021 10:02:39 -0800 Message-Id: <20210210180245.13770-2-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210210180245.13770-1-yu-cheng.yu@intel.com> References: <20210210180245.13770-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 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 816830e3f062..f462ef9d3305 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1964,6 +1964,7 @@ config X86_CET depends on X86_64 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