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=-4.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=no 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 DF790C433DF for ; Fri, 7 Aug 2020 06:25:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A187322CAE for ; Fri, 7 Aug 2020 06:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781512; bh=5VC9/nSDJz4iTSAcWPUj4TKuLdRWZPWrGmP6buxMQ5E=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=wQV7HXB4eK82yjzb0OrNG7xAlH95gG5hmlaP+uSw5J5ue243dUVVfBPp0xHkJN9e9 mBWJwcGgSQCOmkZx8PmN/iAaMpuvwOTdRl22KYZjGOVaWhrosICurts47V9ur/Cm6E NsbwGQocQj+Lhs47lJbouFAOlhlERl2+q9VPSbAw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726542AbgHGGZL (ORCPT ); Fri, 7 Aug 2020 02:25:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:34006 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726402AbgHGGZL (ORCPT ); Fri, 7 Aug 2020 02:25:11 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 857CD221E5; Fri, 7 Aug 2020 06:25:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781510; bh=5VC9/nSDJz4iTSAcWPUj4TKuLdRWZPWrGmP6buxMQ5E=; h=Date:From:To:Subject:In-Reply-To:From; b=2CFEYREGfPiPWQyvJoZR4t6wkaW6zaYVipm3TDBFa0Ba3f/iOEGvrzDmdH9eYWLn0 OhufT+b7rODl6ynrJS+ZQ3bTVt6ZyrtbSQNLhT9GR6A53gi2fwZLLeJX/Ht+Qe/hAs UBxPKeMmZ/FC8ocgNGnRA2YqeHfV8V6um958ghr4= Date: Thu, 06 Aug 2020 23:25:08 -0700 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, ardb@kernel.org, aryabinin@virtuozzo.com, catalin.marinas@arm.com, dvyukov@google.com, elver@google.com, glider@google.com, lenaptr@google.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vincenzo.frascino@arm.com, walter-zh.wu@mediatek.com Subject: [patch 139/163] kasan: allow enabling stack tagging for tag-based mode Message-ID: <20200807062508.9S89oRdQf%akpm@linux-foundation.org> In-Reply-To: <20200806231643.a2711a608dd0f18bff2caf2b@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Andrey Konovalov Subject: kasan: allow enabling stack tagging for tag-based mode Use CONFIG_KASAN_STACK to enable stack tagging. Note, that HWASAN short granules [1] are disabled. Supporting those will require more kernel changes. [1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html Link: http://lkml.kernel.org/r/e7febb907b539c3730780df587ce0b38dc558c3d.1596199677.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Catalin Marinas Cc: Dmitry Vyukov Cc: Elena Petrova Cc: Marco Elver Cc: Vincenzo Frascino Cc: Walter Wu Cc: Ard Biesheuvel Signed-off-by: Andrew Morton --- scripts/Makefile.kasan | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/scripts/Makefile.kasan~kasan-allow-enabling-stack-tagging-for-tag-based-mode +++ a/scripts/Makefile.kasan @@ -44,7 +44,8 @@ else endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ - -mllvm -hwasan-instrument-stack=0 \ + -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ + -mllvm -hwasan-use-short-granules=0 \ $(instrumentation_flags) endif # CONFIG_KASAN_SW_TAGS _