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=-20.6 required=3.0 tests=BAYES_00,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, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 81E00C433E0 for ; Tue, 4 Aug 2020 12:42:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F6032067D for ; Tue, 4 Aug 2020 12:42:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="al711nch" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728147AbgHDMmd (ORCPT ); Tue, 4 Aug 2020 08:42:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727064AbgHDMlr (ORCPT ); Tue, 4 Aug 2020 08:41:47 -0400 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56DFAC0617A1 for ; Tue, 4 Aug 2020 05:41:43 -0700 (PDT) Received: by mail-qk1-x74a.google.com with SMTP id j7so28478162qki.5 for ; Tue, 04 Aug 2020 05:41:43 -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=r3AVQip2xq9L4iLlC84/aNvGhdtcJ5cWyH3sWORBbtc=; b=al711nch3pGhu0oC1wlPaqYQVlVmmhVzmYHp/7d5LETFi5Rtuy1m2i6Q7VZyHZWzvU hgxHf9w/ckVjXi3fhG4d+LBft5K89LkjnHbAbhqXdJQf+gaDGnDI0gAmQvywiJ+Vcfpq fXUe1mXmVqZwCTV/bjfqcfsyDvqhOVJmyD48Oj7Db+FICYod8rKgX7Xwry1oDf2wkEup RR75P7hQf3YSyhtdZQyTtr0fFU1zbFApwbVSnzym/MadtAc0yGXWKQ+A2mW0MAhYz+R7 l9TXw52PMyujrl18cxAUf/X+TsTelw+wmXc4IeyF7EmwiAsMBbLJcMRtX980kmLZ8TUT wSNQ== 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=r3AVQip2xq9L4iLlC84/aNvGhdtcJ5cWyH3sWORBbtc=; b=YdwSO9/0h2gdGuF80ENniYFMpY/Je9O4d1fW66arENdvjn/iSSmdDlt2fNaDg7/A2c AV3GJzWb7cfttzP5Cqcq+K6G87EX7E/WhpPy8srQB8Cwgkx0RmW9f3VbPFbOowUw2MYj GgWonNQTWh61KYVMbXe34j6k6EBsebQiX5VxtS3tCchDtxL9CudMPzJis60TANyVhtih i0k8XhheVVwPsw2MNRHjvVus75BjjZPQQGY+20e7egK8hVuKaPJDImqnz5AHG19vDteH mzQCNwl9e9flyqBDzzj3SXm9QxvJ0vtMf7pMNP0YhWb2OsIXCgPdj9dSiGs7wUJwEE4r iFEw== X-Gm-Message-State: AOAM531sqHCU/DQBcIh2myzjc5QdPRKG8BWlcqf7YCCAlZiMr66rP1g5 I4PfMoqXiP8AeUe5GQe71KcOtE5jqF8ek3li X-Google-Smtp-Source: ABdhPJxNVNohw+RMFq1uv1gOt0ICKpmDjLXFJp+5X/8n8NGst2h3rqGrz443ENowh4INA9/32k2O/16zVxLTFGJ0 X-Received: by 2002:ad4:438e:: with SMTP id s14mr21419425qvr.18.1596544902628; Tue, 04 Aug 2020 05:41:42 -0700 (PDT) Date: Tue, 4 Aug 2020 14:41:27 +0200 In-Reply-To: Message-Id: <99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.163.g6104cc2f0b6-goog Subject: [PATCH v2 4/5] kasan: allow enabling stack tagging for tag-based mode From: Andrey Konovalov To: Andrew Morton Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Marco Elver , Ard Biesheuvel , Arvind Sankar , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Walter Wu , Elena Petrova , Vincenzo Frascino , Catalin Marinas , Andrey Konovalov 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 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 Signed-off-by: Andrey Konovalov --- scripts/Makefile.kasan | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 03757cc60e06..f4beee1b0013 100644 --- a/scripts/Makefile.kasan +++ b/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 -- 2.28.0.163.g6104cc2f0b6-goog