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=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 73B2DC433E0 for ; Wed, 13 Jan 2021 09:17:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4B89233CE for ; Wed, 13 Jan 2021 09:17:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727690AbhAMJRn (ORCPT ); Wed, 13 Jan 2021 04:17:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727660AbhAMJRm (ORCPT ); Wed, 13 Jan 2021 04:17:42 -0500 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5288C061786 for ; Wed, 13 Jan 2021 01:17:01 -0800 (PST) Received: by mail-qt1-x84a.google.com with SMTP id 22so891768qty.14 for ; Wed, 13 Jan 2021 01:17:01 -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=63pl/aS2wHam/AsylCEoY/1tqy/k+q1Go1i6UVadOa8=; b=S5jEmBDfc5/GL0JdOJPWuSgqdiB03H3YFCF63TgKOBBQ/pzGsvZ6xnZDy/0pyE3tCF W0dux4Oqj6j6OA8SRJhrJpw+DV5XVRr6nw+MRgP6tc+tnk5jSWD/8r4SBUgU01qwq8jL erJCU6lgMGpvEhIJ6+2A25JizThP2kMQGTq4Z9t8DNULGnYCs0derrIm2bTMvKk5clG7 31SxhfRZu2gVfMSlQEAA9UQPo7JaYKdyi3xWhSw8eOt4mKqtnprHbHy4IrOBWUEFXOnL Q971ohdSsdefgtSIbokvzFXh2PeDeK+2QN//atuZkXqBX39EgV1D3xzpqO2ElXuWk0vp Z74w== 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=63pl/aS2wHam/AsylCEoY/1tqy/k+q1Go1i6UVadOa8=; b=L0AVJwuzOeEGNWd6nZ+0DJLLRFnkoMu8ykHmuiRXX3OR69KDbJjCdsI4B8UlbYu4uY KM2qGyUuvCeWpVudKScW2DVOWycvBfAyLhFPeURCncdUdWxijNW/hasBetZ+F5UjM+DM BwsYu9zRTEVP+OIhLevm0Qhe9V+9Zqjrzi6wAlFpQKaFaAncq1yfYm4V7pyCeF/PQD5w jh3bGDfzMZ4OLK72uBJ5yZMD/o5yO2XIQFvIoYGKir+wvV5xidRx3b/yQ2yhEZrsP9MU qgVQDzbeZQf+MsvWD5IZagd1QwsD22Uaht5QpKnQmFdv6LqzUglx+u8abNvARlpDWTpi EJsA== X-Gm-Message-State: AOAM531qvH1BSAad/mVfW8SleweHQYpYfqenaQfrznAM2V00dUs8M01I FTZOe0OCgjVM+1oyhU9uhEPwQdFtjso= X-Google-Smtp-Source: ABdhPJwmJllYPVYu7xBhe2K6A43qMvIolCEIaxhTK2SDRI13ePR+mHoVUmKF0j3hzBIH6v05khmN4YdZOpI= Sender: "glider via sendgmr" X-Received: from glider.muc.corp.google.com ([2a00:79e0:15:13:f693:9fff:fef4:9ff]) (user=glider job=sendgmr) by 2002:a05:6214:321:: with SMTP id j1mr1452876qvu.32.1610529421134; Wed, 13 Jan 2021 01:17:01 -0800 (PST) Date: Wed, 13 Jan 2021 10:16:53 +0100 Message-Id: <20210113091657.1456216-1-glider@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog Subject: [PATCH 0/4] Add sysfs interface to collect reports from debugging tools From: Alexander Potapenko To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: Alexander Potapenko Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset adds a library that captures error reports from debugging tools like KASAN or KFENCE and exposes those reports to userspace via sysfs. Report capturing is controlled by two new types of tracepoints: error_report_start and error_report_end, that must be added to the tools that want to use this new feature. Alexander Potapenko (4): tracing: add error_report trace points lib: add error_report_notify to collect debugging tools' reports kfence: use error_report_start and error_report_end tracepoints kasan: use error_report_start and error_report_end tracepoints include/trace/events/error_report.h | 51 +++++ kernel/trace/Makefile | 1 + kernel/trace/error_report-traces.c | 11 ++ lib/Kconfig.debug | 14 ++ lib/Makefile | 2 + lib/error_report_notify.c | 278 ++++++++++++++++++++++++++++ mm/kasan/report.c | 15 +- mm/kfence/report.c | 3 + 8 files changed, 369 insertions(+), 6 deletions(-) create mode 100644 include/trace/events/error_report.h create mode 100644 kernel/trace/error_report-traces.c create mode 100644 lib/error_report_notify.c -- 2.30.0.284.gd98b1dd5eaa7-goog