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=-21.3 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,SPF_HELO_NONE,SPF_PASS,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 9DB84C433DB for ; Fri, 5 Feb 2021 19:33:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 441AA64F9B for ; Fri, 5 Feb 2021 19:33:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233465AbhBERue (ORCPT ); Fri, 5 Feb 2021 12:50:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233376AbhBEPxS (ORCPT ); Fri, 5 Feb 2021 10:53:18 -0500 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2842DC061756 for ; Fri, 5 Feb 2021 09:34:51 -0800 (PST) Received: by mail-qv1-xf4a.google.com with SMTP id h13so5524782qvo.18 for ; Fri, 05 Feb 2021 09:34:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=uW4XwdDsDqPZKdJsjSNV/lvgiACDWFIJBYlg/yy/ua8=; b=gREtjvrNU/DL/BB5f0NB+H4mklQaYOxi0xqMR54soyojmd5TpblFukPUVRrIbkIdkd hfABx4PHO1ExToVFCxYaWggl0Nz2GFYGPoMq70828isVXaPRjrE4zpGUF/CgEn6Ky/kg t9foBh6L2WHIEQMPmljuLensxPBFII4zfY7I7FAE1CiQrxMtplU9KLRf1p2WFcpkVmhB XfqhiYJZbIULXBdzmX58JxPik9yU9xSWmtQr+1Gapmzot2SOKyvfuRtgoetvYxIBe4+V v4ZU9xlOx9HdQNEtUwffl7d/VtaLFIlxv6Ld1fYCJ98jg/1zudsVC2jlTN4SNXGP15ZA xV8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=uW4XwdDsDqPZKdJsjSNV/lvgiACDWFIJBYlg/yy/ua8=; b=NoN8JnKK3SA+9nzLUHkqxkvPiIPlYs94Vscn3t7JCcXss6xCGtMz3CVrAR+RG2tlx7 6NMb8Yb3HjXCWTkY4sTS9GnDBrVs7bgixApvH1hPdT1upmnxVXpeJIcc8DK62XkwKIA8 uaRtT3/s5SJK7Q+JNYxY6M1RB2lLnc21IBvmlEvCMOafOdgKk2pMIaGP2I2UV6byCJAS pzQbob5QhyV5jCQyAlccp+PggnvnHBKba3AdzdfICj4WkRWgVy3/BFQtlaQerCDkOviB ZoDGWzvlpRHqR0avP7VoYI+IXPQ4rvBHpECuiBNH4hu8vdWUiM/oKWctHSFepQjHA8+v BmXw== X-Gm-Message-State: AOAM533LsBF+WzKeZSfGuPhVBbSaRbSGzVTE+oF8yTBMyP/5CSt2YNxQ uFwUpawKQNCsAoNS5NLpHAJ2hQgm8Z6pDEba X-Google-Smtp-Source: ABdhPJzuQv6b7CvA7ADc4i5f9Vgssq9E+uX168n5SbxDe6+yK6EQLRrOkgWeNI0WZVCe58w78UzylPBPDFpwROPs Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:edb8:b79c:2e20:e531]) (user=andreyknvl job=sendgmr) by 2002:a0c:9b9e:: with SMTP id o30mr5523277qve.62.1612546490248; Fri, 05 Feb 2021 09:34:50 -0800 (PST) Date: Fri, 5 Feb 2021 18:34:34 +0100 Message-Id: Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH v3 mm 00/13] kasan: optimizations and fixes for HW_TAGS From: Andrey Konovalov To: Andrew Morton , Catalin Marinas , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver Cc: Will Deacon , Andrey Ryabinin , Peter Collingbourne , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset makes the HW_TAGS mode more efficient, mostly by reworking poisoning approaches and simplifying/inlining some internal helpers. With this change, the overhead of HW_TAGS annotations excluding setting and checking memory tags is ~3%. The performance impact caused by tags will be unknown until we have hardware that supports MTE. As a side-effect, this patchset speeds up generic KASAN by ~15%. Changes v2->v3: - Rebased onto mm. - Add documentation update patch. Changes v1->v2: - Use EXPORT_SYMBOL_GPL() for arm64 symbols. - Rename kmalloc bool flag argument to is_kmalloc. - Make empty mte_set_mem_tag_range() return void. - Fix build warning in 32-bit systems by using unsigned long instead of u64 in WARN_ON() checks. - Minor changes in comments and commit descriptions. - Use kfence_ksize() before __ksize() to avoid crashes with KFENCE. - Use inline instead of __always_inline. Andrey Konovalov (13): kasan, mm: don't save alloc stacks twice kasan, mm: optimize kmalloc poisoning kasan: optimize large kmalloc poisoning kasan: clean up setting free info in kasan_slab_free kasan: unify large kfree checks kasan: rework krealloc tests kasan, mm: fail krealloc on freed objects kasan, mm: optimize krealloc poisoning kasan: ensure poisoning size alignment arm64: kasan: simplify and inline MTE functions kasan: inline HW_TAGS helper functions arm64: kasan: export MTE symbols for KASAN tests kasan: clarify that only first bug is reported in HW_TAGS Documentation/dev-tools/kasan.rst | 8 +- arch/arm64/include/asm/cache.h | 1 - arch/arm64/include/asm/kasan.h | 1 + arch/arm64/include/asm/mte-def.h | 2 + arch/arm64/include/asm/mte-kasan.h | 65 ++++++++-- arch/arm64/include/asm/mte.h | 2 - arch/arm64/kernel/mte.c | 48 +------- arch/arm64/lib/mte.S | 16 --- include/linux/kasan.h | 25 ++-- lib/test_kasan.c | 111 +++++++++++++++-- mm/kasan/common.c | 187 ++++++++++++++++++++--------- mm/kasan/hw_tags.c | 2 +- mm/kasan/kasan.h | 72 +++++++++-- mm/kasan/shadow.c | 53 ++++---- mm/slab_common.c | 18 ++- mm/slub.c | 3 +- 16 files changed, 425 insertions(+), 189 deletions(-) -- 2.30.0.365.g02bc693789-goog