From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 E615BC2D0DB for ; Tue, 28 Jan 2020 18:50:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B918524693 for ; Tue, 28 Jan 2020 18:50:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="o7KYQSca" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726927AbgA1SuG (ORCPT ); Tue, 28 Jan 2020 13:50:06 -0500 Received: from mail-qt1-f202.google.com ([209.85.160.202]:54224 "EHLO mail-qt1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726833AbgA1SuA (ORCPT ); Tue, 28 Jan 2020 13:50:00 -0500 Received: by mail-qt1-f202.google.com with SMTP id m8so9085820qta.20 for ; Tue, 28 Jan 2020 10:49:59 -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=bNCXRmM/yr4GL3yZ1bhHRJc0r5YpsDoQ2qXNiKtbIjQ=; b=o7KYQScaTc5r0bWGyHvOSj2qDSparI8nM7EV2GGaR8zJgb85Unw1bAkclg2/3gkVjV sWiP8fvXbxWaFa/3ylPd3mUT0DJXJwDNPclKGR0BQxZ4Cc2/1/tkupECkGjVL+qym1xJ Ae3JulKZHCqg8uCAc0O9oxR71IRgfwLYrHi5idXDY3EpdKDxL0ypLNFgS5UoGwYlvaVK coXWpBTQvrtoEim7i5jhgtRDRSCIEyXek1a+HFz3DKK+zmjORBlTmey8aAdNXMqQeIAI 9YEW0BDh4vOazWGWstuyBaqYyWx5H8LIDc1PihTJnexHB7ha5NBdEF0GBHhBS0eIc4XK 0rfg== 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=bNCXRmM/yr4GL3yZ1bhHRJc0r5YpsDoQ2qXNiKtbIjQ=; b=mG1EYUV3zFE5TqARmVwuVwQDKltUcB9Nw0MfQ6SlaPJt7Xe7TZGuXS9zMWhP7FQiMi ZE9tdFuK7dcXP46xFHcNHU5yCF9EcnZCmQncm3QAzxzd3iKFFIyhc7IYjBdnQpNkRFg7 58f6cwfPyCJoVNenAdlh5Fm8tRDjPIibvXDb3xqwgR3Epnul+lEmoUpWJm+RZ+Q9Lb+N MIOk0nAs7iIoCKsqv/jcLA0VOSQclYzfNT1n4cEvuhQzGAFkT0EndLguPiDYNOQ/FGRy xerKJeNNXwuMmoi2E0rb1Ntin5XUhOv7NktCCC9JhUyyEgYb0Nzda0z1jclrOyP8YF3R 3SVw== X-Gm-Message-State: APjAAAWaVJ1hr5ydZNHHSY8goDgqLAVQQAs1e3aUlBm36oc3IMJ/y7hJ Zn06sdXnzf6BTyCbEVSp1HXas1vWt5+D9NsnJOc= X-Google-Smtp-Source: APXvYqx+U9CfKO16wIXNBeeO96dJ60XaZ+hhyoe8kAoit2FdttoilLWi0KpO3nWQj2EBXb7JYYq1XAJT8FXWdsvdaLA= X-Received: by 2002:aed:2783:: with SMTP id a3mr7863657qtd.284.1580237398897; Tue, 28 Jan 2020 10:49:58 -0800 (PST) Date: Tue, 28 Jan 2020 10:49:31 -0800 In-Reply-To: <20200128184934.77625-1-samitolvanen@google.com> Message-Id: <20200128184934.77625-9-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200128184934.77625-1-samitolvanen@google.com> X-Mailer: git-send-email 2.25.0.341.g760bfbb309-goog Subject: [PATCH v7 08/11] arm64: vdso: disable Shadow Call Stack From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland , james.morse@arm.com Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Shadow stacks are only available in the kernel, so disable SCS instrumentation for the vDSO. Signed-off-by: Sami Tolvanen Reviewed-by: Nick Desaulniers Reviewed-by: Kees Cook Reviewed-by: Mark Rutland Acked-by: Will Deacon --- arch/arm64/kernel/vdso/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index dd2514bb1511..a87a4f11724e 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -25,7 +25,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING VDSO_LDFLAGS := -Bsymbolic -CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os +CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) KBUILD_CFLAGS += $(DISABLE_LTO) KASAN_SANITIZE := n UBSAN_SANITIZE := n -- 2.25.0.341.g760bfbb309-goog