From patchwork Fri Mar 12 00:49:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12133517 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 77C53C43333 for ; Fri, 12 Mar 2021 00:50:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5485E64F82 for ; Fri, 12 Mar 2021 00:50:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231643AbhCLAuS (ORCPT ); Thu, 11 Mar 2021 19:50:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231458AbhCLAtw (ORCPT ); Thu, 11 Mar 2021 19:49:52 -0500 Received: from mail-qv1-xf49.google.com (mail-qv1-xf49.google.com [IPv6:2607:f8b0:4864:20::f49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B9AFC061760 for ; Thu, 11 Mar 2021 16:49:52 -0800 (PST) Received: by mail-qv1-xf49.google.com with SMTP id j3so16497439qvo.1 for ; Thu, 11 Mar 2021 16:49:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=sXIP93k7c8DVrjXtTxj/fkzV3wLZlyNPf+yLEPo7wRE=; b=mtaO9P67TJP45ojSK27tXo13IqOLlDN5Do+q8NG4//IHMLdFX+TlJ0yAD85OgHDHft IV/qU1Fk/J6kVcbC65lo7Ay/XsODQomhEe1LZO8JVY91xpxbEWn7mnMF6ozdBE6gtxeG TVP5gwBfy6iSfOJ3WccgbTihVCrZtVtkL4U7o1ZFGTcb7dn62ug4AzvIwiinUpTkWeQz t91K/KwGP7ANbPLFV1Lg1+3R8mXKS6B5NSjRBUh+zIRMcPA+0EWH40iXDGlfFI1N0+v9 s2cZP8RMW4pYDgDNvF+rrzN/fT5uHPXzQ803CSr1JXQP08IdhB8gye8ibnO8y9/FsYuL b3Qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=sXIP93k7c8DVrjXtTxj/fkzV3wLZlyNPf+yLEPo7wRE=; b=FvooGBK9tlkiubaU2JdzHqhwMrAIpmX55PHC5yBaSB55k6L2thURvawKANyzpc9dKn fgV+qyZ12GtVfodtbRCyUeyJ+s86RqiQ01QCXRQr0xIAxNmn6gRUy7gh2au2rWdcMEqg IWybJsvvf207MMlQT4YR9SA8zgRRnE9w1IA+qZ2pqNBp0TUXN5krit2F1QfQcMarf7Pq BRSnxUj3v4g5fRP3LzT7IF8HHNqHpJOEQjg9TaDCyMJTqf7pXngDA9Nrfi4QYfuKcr8q WsP7VdzyJrwzUbDQ/40IbeOUfZpVznHLiQqr7wRPk4b5tvoLAyCi95s/RNXpVWV3P73p iDpg== X-Gm-Message-State: AOAM532rsFE0MnCL/FZqtVm+Bzm9Xaz8/cQmUILDT7ATARAVI1srQLNz KZpaRbJBnYV5z4aim2U29R3hzAFuc2EFRRUtfF4= X-Google-Smtp-Source: ABdhPJzXMuYXkgN2WuqAdQ1salNLwv1mgxPH25fvp7ZocNaBgCeLvuP/MBua0CMHO5On1yO8RvH+zhV5TNT/H5rMXt0= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:c86b:8269:af92:55a]) (user=samitolvanen job=sendgmr) by 2002:ad4:4c83:: with SMTP id bs3mr10040851qvb.41.1615510191555; Thu, 11 Mar 2021 16:49:51 -0800 (PST) Date: Thu, 11 Mar 2021 16:49:18 -0800 In-Reply-To: <20210312004919.669614-1-samitolvanen@google.com> Message-Id: <20210312004919.669614-17-samitolvanen@google.com> Mime-Version: 1.0 References: <20210312004919.669614-1-samitolvanen@google.com> X-Mailer: git-send-email 2.31.0.rc2.261.g7f71774620-goog Subject: [PATCH 16/17] KVM: arm64: Disable CFI for nVHE From: Sami Tolvanen To: Kees Cook Cc: Nathan Chancellor , Nick Desaulniers , Masahiro Yamada , Will Deacon , Jessica Yu , Arnd Bergmann , Tejun Heo , bpf@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Disable CFI for the nVHE code to avoid address space confusion. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/arm64/kvm/hyp/nvhe/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile index a6707df4f6c0..fb24a0f022ad 100644 --- a/arch/arm64/kvm/hyp/nvhe/Makefile +++ b/arch/arm64/kvm/hyp/nvhe/Makefile @@ -75,9 +75,9 @@ quiet_cmd_hyprel = HYPREL $@ quiet_cmd_hypcopy = HYPCOPY $@ cmd_hypcopy = $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ $< $@ -# Remove ftrace and Shadow Call Stack CFLAGS. -# This is equivalent to the 'notrace' and '__noscs' annotations. -KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) +# Remove ftrace, Shadow Call Stack, and CFI CFLAGS. +# This is equivalent to the 'notrace', '__noscs', and '__nocfi' annotations. +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI), $(KBUILD_CFLAGS)) # KVM nVHE code is run at a different exception code with a different map, so # compiler instrumentation that inserts callbacks or checks into the code may