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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 62FC9C433DB for ; Thu, 21 Jan 2021 13:21:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1129B23A01 for ; Thu, 21 Jan 2021 13:21:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731513AbhAUNUo (ORCPT ); Thu, 21 Jan 2021 08:20:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731670AbhAUNUF (ORCPT ); Thu, 21 Jan 2021 08:20:05 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E844CC0613C1 for ; Thu, 21 Jan 2021 05:19:24 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id b3so2146526yba.20 for ; Thu, 21 Jan 2021 05:19:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=EZM8uwys0tIYTV5rV7IMpiN4Wky1Ucyd+XglcRPDA0k=; b=WFun/2AwoihyT9AoddjjkcKTUjc9aI3jv7IFGHwz+lYgIMz5b4WPNxXTiyzbrd+LJk WO3FxCB1Z/havwsDuvKosLXatsLCtqTnsMN3N5jAgG74u80nWFXEmQ+mBgYjdUB//JjX Q6kAQ+pAl8XYDz2Ei2+nblI2fGGTv+uKtJHtRqlXQfEDBJAQS+jkFBswpyKA8etRcnUH OOs71Y+Fd5/i9qecUzQiepvITmFqkejQn7UN/r27rnGMC+BNYBM5HmdI/y7s1YXWGRBt lfvhUY4CVirmJMHsy+tYXnPwttmMKEyvF9fWE1SPqi/BxiZHoPg/x/SPCfVGkwMJnOka xM9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=EZM8uwys0tIYTV5rV7IMpiN4Wky1Ucyd+XglcRPDA0k=; b=cbzWnDJExCSZmZmmECpx7z37sJ+mtMbK26zcYMjZkVGsEKQZeKoQ0rPQia7U9Vl3Ei qQf4whGgnM+oZf64N0ltEHC23beu0pZ97VdfY5MEtb0En6sanuMfvDpurQLfo928ZgMN QDmkaeb+hN23ot2bDbdMOnXR4fpmUCv1vPbiX12D7gl6wTogBZS4LCKkcHa0aH164Zuj x7PpQQ8jzc8bIWMbPzKuJ9kxrzzX1kSbh9Z0Daj4KA+sWs8wD8Xdkox8tTeqHa5ZD/hX IcsIr/LrqvNuLmwLeR5QAXU8GDow8WbsD7B/0ftw6UEofiElO9ccP6NNe+55y5AD6OXp 5UWQ== X-Gm-Message-State: AOAM533QpEYNzuZgbcLqiZrA5PfjHIqYgCcY1PSBYPnX1zffvjA1rkhp 73FI99z6On9U2K6D5PxE9JE7pqynThk= X-Google-Smtp-Source: ABdhPJwtDkTgRZRk3yc/3yCU/TR+GnrcNDSCBz+LT6IxxpACRB4tZzjHkAxKgNiuzuLPqOyxu2xUmBX1mnc= 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:a25:3bc5:: with SMTP id i188mr20415374yba.332.1611235164118; Thu, 21 Jan 2021 05:19:24 -0800 (PST) Date: Thu, 21 Jan 2021 14:19:14 +0100 In-Reply-To: <20210121131915.1331302-1-glider@google.com> Message-Id: <20210121131915.1331302-3-glider@google.com> Mime-Version: 1.0 References: <20210121131915.1331302-1-glider@google.com> X-Mailer: git-send-email 2.30.0.296.g2bfb1c46d8-goog Subject: [PATCH 2/3] kfence: use error_report_end tracepoint From: Alexander Potapenko To: akpm@linux-foundation.org, glider@google.com Cc: elver@google.com, andreyknvl@google.com, dvyukov@google.com, mingo@redhat.com, pmladek@suse.com, rostedt@goodmis.org, sergey.senozhatsky@gmail.com, linux-mm@kvack.org, linux-api@vger.kernel.org, vbabka@suse.cz, gregkh@linuxfoundation.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org Make it possible to trace KFENCE error reporting. A good usecase is watching for trace events from the userspace to detect and process memory corruption reports from the kernel. Suggested-by: Marco Elver Cc: Andrew Morton Cc: Andrey Konovalov Cc: Dmitry Vyukov Cc: Ingo Molnar Cc: Marco Elver Cc: Petr Mladek Cc: Steven Rostedt Cc: Sergey Senozhatsky Cc: linux-mm@kvack.org Signed-off-by: Alexander Potapenko --- v3: - dropped error_report_start v2: - change error_report_start and error_report_end prototypes to accept enum error_detector instead of char* (as suggested by Steven Rostedt) --- mm/kfence/report.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/kfence/report.c b/mm/kfence/report.c index 901bd7ee83d8..f9fc93b2fe2e 100644 --- a/mm/kfence/report.c +++ b/mm/kfence/report.c @@ -14,6 +14,7 @@ #include #include #include +#include #include @@ -246,6 +247,7 @@ void kfence_report_error(unsigned long address, bool is_write, struct pt_regs *r show_regs(regs); else dump_stack_print_info(KERN_ERR); + trace_error_report_end(ERROR_DETECTOR_KFENCE, address); pr_err("==================================================================\n"); lockdep_on(); -- 2.30.0.296.g2bfb1c46d8-goog