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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 731D9C3A5A6 for ; Sun, 22 Sep 2019 19:26:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 48309206C2 for ; Sun, 22 Sep 2019 19:26:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569180390; bh=Ykb93oMr+3gztSj7HV5KYl0vXoN7XcXRQ9o4/s8Ik+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1x8451fPk7mxCr3bJ85dNdUqjaW+8A0cQbP7ONIVdUoSLs7URIsMVSORLbh+Yc2AU 8AAG8Bz4QHgBvd7LcBaX/25EQjdvE93Wmgn/WA6DsndP38UB7q+jM5T1oXEDWpRI4Y MPtiE5PlVrkrXJv7/qTCd+tkMcSW8GlxeJktfxt0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406301AbfIVSvs (ORCPT ); Sun, 22 Sep 2019 14:51:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:49938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406260AbfIVSvr (ORCPT ); Sun, 22 Sep 2019 14:51:47 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D59192190F; Sun, 22 Sep 2019 18:51:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178306; bh=Ykb93oMr+3gztSj7HV5KYl0vXoN7XcXRQ9o4/s8Ik+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AETwH0Wm5ZQImUP5VLQ0CbyiwUabmn1rFX9zF6tokobeb1Dksla/Tir1cwCdLF7gG GmK6XsycZuVVSB6/nVwAMFPQuabw2+3UJsgxZ5n+ID+S9wbsYysp6eWHhGFf+F3Mgw 2UHiiQLTNqvarsH9qR0SCv2VEtoTU5DXEukhrBJo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mark Rutland , Catalin Marinas , Andrey Ryabinin , Will Deacon , Sasha Levin , kasan-dev@googlegroups.com, linux-kbuild@vger.kernel.org Subject: [PATCH AUTOSEL 5.2 077/185] kasan/arm64: fix CONFIG_KASAN_SW_TAGS && KASAN_INLINE Date: Sun, 22 Sep 2019 14:47:35 -0400 Message-Id: <20190922184924.32534-77-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922184924.32534-1-sashal@kernel.org> References: <20190922184924.32534-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mark Rutland [ Upstream commit 34b5560db40d2941cfbe82eca1641353d5aed1a9 ] The generic Makefile.kasan propagates CONFIG_KASAN_SHADOW_OFFSET into KASAN_SHADOW_OFFSET, but only does so for CONFIG_KASAN_GENERIC. Since commit: 6bd1d0be0e97936d ("arm64: kasan: Switch to using KASAN_SHADOW_OFFSET") ... arm64 defines CONFIG_KASAN_SHADOW_OFFSET in Kconfig rather than defining KASAN_SHADOW_OFFSET in a Makefile. Thus, if CONFIG_KASAN_SW_TAGS && KASAN_INLINE are selected, we get build time splats due to KASAN_SHADOW_OFFSET not being set: | [mark@lakrids:~/src/linux]% usellvm 8.0.1 usekorg 8.1.0 make ARCH=arm64 CROSS_COMPILE=aarch64-linux- CC=clang | scripts/kconfig/conf --syncconfig Kconfig | CC scripts/mod/empty.o | clang (LLVM option parsing): for the -hwasan-mapping-offset option: '' value invalid for uint argument! | scripts/Makefile.build:273: recipe for target 'scripts/mod/empty.o' failed | make[1]: *** [scripts/mod/empty.o] Error 1 | Makefile:1123: recipe for target 'prepare0' failed | make: *** [prepare0] Error 2 Let's fix this by always propagating CONFIG_KASAN_SHADOW_OFFSET into KASAN_SHADOW_OFFSET if CONFIG_KASAN is selected, moving the existing common definition of +CFLAGS_KASAN_NOSANITIZE to the top of Makefile.kasan. Cc: Catalin Marinas Signed-off-by: Mark Rutland Acked-by: Andrey Ryabinin Tested-by Steve Capper Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- scripts/Makefile.kasan | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 6410bd22fe387..03757cc60e06c 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -1,4 +1,9 @@ # SPDX-License-Identifier: GPL-2.0 +ifdef CONFIG_KASAN +CFLAGS_KASAN_NOSANITIZE := -fno-builtin +KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) +endif + ifdef CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_INLINE @@ -7,8 +12,6 @@ else call_threshold := 0 endif -KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) - CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) @@ -45,7 +48,3 @@ CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ $(instrumentation_flags) endif # CONFIG_KASAN_SW_TAGS - -ifdef CONFIG_KASAN -CFLAGS_KASAN_NOSANITIZE := -fno-builtin -endif -- 2.20.1