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=-11.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 BCFEAC282DD for ; Fri, 10 Jan 2020 18:50:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 89D672082E for ; Fri, 10 Jan 2020 18:50:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="VACd/K5N" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728972AbgAJSuV (ORCPT ); Fri, 10 Jan 2020 13:50:21 -0500 Received: from mail-wr1-f74.google.com ([209.85.221.74]:37576 "EHLO mail-wr1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728959AbgAJSuU (ORCPT ); Fri, 10 Jan 2020 13:50:20 -0500 Received: by mail-wr1-f74.google.com with SMTP id z14so1335497wrs.4 for ; Fri, 10 Jan 2020 10:50:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=FKzriefzB+sFj+yanYF71dYfNewJn715ajVrF6hXaPc=; b=VACd/K5Nu5cG+wiPgp8G70D3txgJ6as16XJETV4f1dp1Hy5yjg0kQ9ngLhhHIUwhoM pzh8p508zag5fBT411FlwlZaRTYsuf/SeVRAE+2TViEpyFLBEuBtNu5JKzZoLR6vi3MB LMpa/o7hRjUSZeVBcirPG90njevurjfBQ3s3FzGIp+70nW2/H4h09CSRqMjN1UDM7QGT XZNzuZn3chMruJozrEMKIZPOBMHW1gttI8uRlN2Z34AIx06SDyzZwwZU5D5nMtDiWBV+ aQwoPVv2jcQxiVSIf2VkM9tuF0D5u1rwusHwmEqmMVD1Cjdf+aVfQSm2OQP2iMAVNh/X dMKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=FKzriefzB+sFj+yanYF71dYfNewJn715ajVrF6hXaPc=; b=PRzOgFH4Rlejhc+/mtX6+IENhKMvpKg270ZoC8EMCBtegOpSnQZWIi4xq0qw6vwzeW tJUXYdnQc30pmL2kWCOonPVHQlK3xsQO1XfBjANHWRU4luLamlwcGpVh5KB/yt0V52PJ QIg6pUHrQWn8DOVsI4scGzuL539rImPPGQ1ta1KZ0nPg59qIZKd+PEFUOWhnPd8D1i0N CVAq0TGSxToC/AQaEGmc/IUXa2cUrEIAKByNg1t79TKbUYUnQ3CK7PZtIJMX/laGA3lC MeSl0gIhI7Yjs1JCChZzkQGp52JGy/cdcE10AdKlgPKDBuDu0Ovw3qFd/avKx+8hOIl2 2xsg== X-Gm-Message-State: APjAAAUbXpJ1/EiZo2E8lYk1HE6VQ4HgF7Kg42npkTZMCWBLHZ/sM40H TlZZh3U2gabmagYh57k2zq3Mc0WLwA== X-Google-Smtp-Source: APXvYqwz4O4dhhOP5mop94mtiXO0Vg+27x4HvHv3Tqj5pjl29jIbA+lNW0/EVfbmZi1p/ZOzim78Xpc1UA== X-Received: by 2002:a5d:534b:: with SMTP id t11mr5061885wrv.120.1578682218808; Fri, 10 Jan 2020 10:50:18 -0800 (PST) Date: Fri, 10 Jan 2020 19:48:32 +0100 Message-Id: <20200110184834.192636-1-elver@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.25.0.rc1.283.g88dfdc4193-goog Subject: [PATCH -rcu v2 0/2] kcsan: Improvements to reporting From: Marco Elver To: elver@google.com Cc: paulmck@kernel.org, andreyknvl@google.com, glider@google.com, dvyukov@google.com, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org 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 Improvements to KCSAN data race reporting: 1. Show if access is marked (*_ONCE, atomic, etc.). 2. Rate limit reporting to avoid spamming console. v2: * Paul E. McKenney: commit message reword. * Use jiffies instead of ktime -- we want to avoid calling into any further complex libraries, since KCSAN may also detect data races in them, and as a result potentially leading to observing corrupt state (e.g. here, observing corrupt ktime_t value). Marco Elver (2): kcsan: Show full access type in report kcsan: Rate-limit reporting per data races kernel/kcsan/core.c | 15 +++-- kernel/kcsan/kcsan.h | 2 +- kernel/kcsan/report.c | 151 +++++++++++++++++++++++++++++++++++------- lib/Kconfig.kcsan | 10 +++ 4 files changed, 146 insertions(+), 32 deletions(-) -- 2.25.0.rc1.283.g88dfdc4193-goog