From patchwork Wed Mar 31 21:27:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12176449 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 1A987C001E6 for ; Wed, 31 Mar 2021 21:28:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EACD061041 for ; Wed, 31 Mar 2021 21:28:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232923AbhCaV2X (ORCPT ); Wed, 31 Mar 2021 17:28:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232927AbhCaV16 (ORCPT ); Wed, 31 Mar 2021 17:27:58 -0400 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 0D991C061763 for ; Wed, 31 Mar 2021 14:27:57 -0700 (PDT) Received: by mail-qv1-xf49.google.com with SMTP id r5so2095802qvc.11 for ; Wed, 31 Mar 2021 14:27:57 -0700 (PDT) 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=tNWRsiiEAfetheYG6qtDYdd6Zu2YM8DJGmENfE26Aac=; b=ubXheP2brktumzheoRlwOGBaDAhJZCw5NjiWWseiWXm7uPGHPIEhQNkw1vclDXilyC T58HwhxWmupp1FHmmbm/one9xjzW1zyEIjkTSSxxlsem3MjSEZyOYyr2rhKeCFRUkd1c yGspf/krXoZV1aO23JrXpEBnl0Y82WLgsZPob752XnnEkvdLJpCAqDdeG+QPej4XPSZi CCDXPydG6+7wL9MGmLynGahaXHCtSa4TMIRQo0YgQK5KW48jFUEOkg9RmceaiJf2wbgY lIMNbUBaPlDMhK4s8fFJq1GcJptaYswx+mQ1VL7I/WglifRbnqfcOPmIuT0hvWr13KAr jjYw== 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=tNWRsiiEAfetheYG6qtDYdd6Zu2YM8DJGmENfE26Aac=; b=nSJriqq0tuuo1pS6ZFK5+7DbEIQewUtaH4KTlit8u0t89WgQfKc4Ya10nInKaGKLF2 /bSltFY+8TCVXunUvAA5wPuqIinEF/A3gaRlwD8WR6UeVnHx/6gBJTe0VOmRhKWqgN8h rVYvIqavE1Ak8jIzpyoAG8bysAu84z5i/mZKUDsNFnUXsnjFtNLI3k/Yf00+A5H+bIg3 l2qnTXfNI1enHHD8Vv3a8h/iMx+MGfFE5OhpDhN4RBh1PBJPQz41H+KEAgWiPZ1NqRvK 1JEeFcCj/aS3W8qb7mv/PlWnWxjf7DWT0YvQu+yKqXhFUTPmDRL1kF7/R8dm+AELmIwy mdPw== X-Gm-Message-State: AOAM531kQA/PyzjnnrY6turrleOuIu8LfbNaieMnqWbB2XIGwO29ycYF i28J54z7eiZsQpRAJiOJoRdHQWbnQ5VlIPybYac= X-Google-Smtp-Source: ABdhPJzZWP60rNMcikFQnnnMLQ3nIFchg+3t6XyAeYS/TMwgF+id2xc8kKag8yrH4KJDKMnacT9UMf7IYNlFmwHArxk= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:7933:7015:a5d5:3835]) (user=samitolvanen job=sendgmr) by 2002:a0c:f349:: with SMTP id e9mr4952920qvm.59.1617226076143; Wed, 31 Mar 2021 14:27:56 -0700 (PDT) Date: Wed, 31 Mar 2021 14:27:20 -0700 In-Reply-To: <20210331212722.2746212-1-samitolvanen@google.com> Message-Id: <20210331212722.2746212-17-samitolvanen@google.com> Mime-Version: 1.0 References: <20210331212722.2746212-1-samitolvanen@google.com> X-Mailer: git-send-email 2.31.0.291.g576ba9dcdaf-goog Subject: [PATCH v4 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 , "Paul E. McKenney" , Christoph Hellwig , Peter Zijlstra , Sedat Dilek , 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, clang-built-linux@googlegroups.com, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: bpf@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