From patchwork Fri Dec 6 22:13:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11277107 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 67BB214BD for ; Fri, 6 Dec 2019 22:17:22 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 42CE62054F for ; Fri, 6 Dec 2019 22:17:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ab8FeuQL"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="r3PF25I8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 42CE62054F Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version :Message-Id:In-Reply-To:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6DCTwwOIkgvBEiYaioxrNDEtDaUpWzV/pZVN5LGIS6U=; b=ab8FeuQLBHRCdS 1RyJV5FK7ejKcDaVVyuU1ePPIP+DpPgTZdjpqJIvfeXcPPqfNOWGoJUOH63jnrgWgx2eO9zbMO1W2 uOGCx1JsGPgVnggkXKQN964OLUVxyHN22LewfFATN3LU/B0t+ueVK8KaHLnv7Ll1VGl9RYf/75TbU rrxGTRtSb0DyHd19XFOlJQ7y+yKDnRMIbdHlrz/gxJwJGnNoz3RUic1wsAh859Iam6ml/W/ve2Fnr iLtnVGbJCbe7fh55JziHgXfg75cB0G32p0Jzi9gGz1Da+tkgav3yg2IgLX5ugW3T12XdXfPBQDmE2 Jbw2nKqeurKlnSQv9fNA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1idLuX-0002Eo-8q; Fri, 06 Dec 2019 22:17:17 +0000 Received: from mail-pg1-x549.google.com ([2607:f8b0:4864:20::549]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1idLro-0006pH-7A for linux-arm-kernel@lists.infradead.org; Fri, 06 Dec 2019 22:14:31 +0000 Received: by mail-pg1-x549.google.com with SMTP id r2so4554089pgl.4 for ; Fri, 06 Dec 2019 14:14:27 -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=Ve3ap/e8LZQd2dbv+oe7rMBjURea5FcvbovcdBkDba8=; b=r3PF25I8b9gh7TGG4nyyWOG/IBeyi5leohyetpHGT7HVJVhKrS0Kq4x36qkr37xPQZ H4HOZxl0BVJe13eGlGPV1yZKSRRS5AmoOeRlUDllq58XEGXxaFeTrlkb9BrV5kcixQbm XbGbrkKiH70yhU3gMykfI079m4y0ZDpdOP7kIIKS/yBz18w4YMZf4Pr4H9aBR21ygtcB kY14G1EByPoZ/HSscjak3f91JNKl95S2IyZpSGv5MX3WaPMUnLjTgAsAI0PC749M53m0 8RfjY0MYNA3UUEnoDTDY3HwUrUHVLuT76W4oleiH3t8Kx7xMLKek/nE2jk+/o2pgp2U5 oBkw== 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=Ve3ap/e8LZQd2dbv+oe7rMBjURea5FcvbovcdBkDba8=; b=W4Frx/Z7GtS6kctYZVqGgdgCu9+uReXxEqewY+XY+HxTsswTDKXIiLd5c17WNWOmvz uMqHHVuDyewJTHj3ZnDoAJpVCv2iA10E0AJSMxudzn10mcBpUkRL82GL4AibuJ/mjlWy vHdIb7dPprXrl+ifRuYwMyd1tfGN3zT55vLXiw98qs2HPCPOmp6+YfH32papmc/25p+L CzTcIWvu8IIWRbIXTHaH61Hw0xw5wJHdha3+D2hQgJdZgxWRyohiyX7tnwQ1UxfsEMFG /mDck8b8HuftqkyjmXJbYGVPsre0t4QGoeFB32ueDNsIxiF/MNJXd1j1uocc0OrIlcG3 KqLw== X-Gm-Message-State: APjAAAVXzAMEAKUiroZ8SuC25OtM2gTLDCFSgaS+Et32rYEs+qW9ij7/ /Dk0LI2VQUiLZst3kU73eEbqF8x5EdRgfqc4G1I= X-Google-Smtp-Source: APXvYqwk2eRK+EeshXSfp5tSqqdwzFGqYQg2Gt1CoIRgkLdeR9mCxHtnbRaIQkXosCwRykWO94sSQGC7aLJzBhMw49s= X-Received: by 2002:a63:220b:: with SMTP id i11mr6011463pgi.50.1575670466460; Fri, 06 Dec 2019 14:14:26 -0800 (PST) Date: Fri, 6 Dec 2019 14:13:48 -0800 In-Reply-To: <20191206221351.38241-1-samitolvanen@google.com> Message-Id: <20191206221351.38241-13-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191206_141428_296610_135F3150 X-CRM114-Status: UNSURE ( 9.96 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:549 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Masahiro Yamada , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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