From patchwork Fri Feb 5 17:34:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 12070545 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=-11.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 2B18DC433DB for ; Fri, 5 Feb 2021 17:34:53 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A13FD64DA5 for ; Fri, 5 Feb 2021 17:34:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A13FD64DA5 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 12AEF6B0074; Fri, 5 Feb 2021 12:34:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 0DDE96B0075; Fri, 5 Feb 2021 12:34:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F0E5A6B0078; Fri, 5 Feb 2021 12:34:51 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0162.hostedemail.com [216.40.44.162]) by kanga.kvack.org (Postfix) with ESMTP id DE0866B0074 for ; Fri, 5 Feb 2021 12:34:51 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 9B8A8824999B for ; Fri, 5 Feb 2021 17:34:51 +0000 (UTC) X-FDA: 77784914382.03.lead70_1a0d6a0275e6 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id 63F5928A4ED for ; Fri, 5 Feb 2021 17:34:51 +0000 (UTC) X-HE-Tag: lead70_1a0d6a0275e6 X-Filterd-Recvd-Size: 5612 Received: from mail-qk1-f202.google.com (mail-qk1-f202.google.com [209.85.222.202]) by imf43.hostedemail.com (Postfix) with ESMTP for ; Fri, 5 Feb 2021 17:34:50 +0000 (UTC) Received: by mail-qk1-f202.google.com with SMTP id q7so6457133qkn.7 for ; Fri, 05 Feb 2021 09:34:50 -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=cGTNVt+A/KGJKBohHZh4fh0pcgVmwlRATXu2kxsJ+ufD3T3TXLbs/zrY94eHTdGNr0 I7NihSZj+bkOcNaYgmbIUwOGak2jirxwm8uvxeZiXgJt0VE0jNV/2rORV4PcXqmYTfaa mtdHM2t5qPEMay3dWQ+M2bA4TRx1j7viy7Z6bbSdDL+7PLuF6St5YkwtElZP9aPIz9L3 lHxwQqemcotpgk1PaYwgQfb6srLPRkmdT03D+9toAuzbuq5Y1dqPh4WfhzzZl94qHWgd +gpiQRbx6Jbi3Vpm/5r9KfVnRt2ImXSQK5S0hIBOHmahv6Lb0Z7yN0TfzTu8vdN26Zpt yjmw== X-Gm-Message-State: AOAM531prkLv2llP9/8buoj1HddLBcR1nSh5dJo4lfAp0G9wu5lavIc5 zYCnu7OGgo5QI7oNi1BHaEGm7bxWVu5v0/w/ X-Google-Smtp-Source: ABdhPJzuQv6b7CvA7ADc4i5f9Vgssq9E+uX168n5SbxDe6+yK6EQLRrOkgWeNI0WZVCe58w78UzylPBPDFpwROPs 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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(-)