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=-15.8 required=3.0 tests=BAYES_00,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 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 7F882C433E0 for ; Fri, 26 Feb 2021 01:19:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1710F64EE2 for ; Fri, 26 Feb 2021 01:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1710F64EE2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9CA476B00B3; Thu, 25 Feb 2021 20:19:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 929826B00B4; Thu, 25 Feb 2021 20:19:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 840566B00B5; Thu, 25 Feb 2021 20:19:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0004.hostedemail.com [216.40.44.4]) by kanga.kvack.org (Postfix) with ESMTP id 6AAB66B00B3 for ; Thu, 25 Feb 2021 20:19:50 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 3146FDB50 for ; Fri, 26 Feb 2021 01:19:50 +0000 (UTC) X-FDA: 77858662140.24.7C194C8 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf14.hostedemail.com (Postfix) with ESMTP id 165F8C0001FE for ; Fri, 26 Feb 2021 01:19:41 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 3F06B64F2A; Fri, 26 Feb 2021 01:19:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1614302389; bh=/j3GQ5gE/sRa1CKC+gCcNAg/ncAnjBKCm1yVIYvaiXU=; h=Date:From:To:Subject:In-Reply-To:From; b=AQXJhQaOZLXEnh5BaQQ8wZhzit4pQVL/GfwlS1/Pz5N3I2t3GBbXDj9pxCkY3IALA Q1uOauL9rm7qv28v1TUl8UcX1P/bE7krikYX3Rdne+dqfi9cmu17eppU/sfdszdm5U IGKkA81WdpxQtXgosp1e4pXHWJupfeL0MkN8djU0= Date: Thu, 25 Feb 2021 17:19:47 -0800 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, dvyukov@google.com, elver@google.com, glider@google.com, gregkh@linuxfoundation.org, linux-mm@kvack.org, mingo@redhat.com, mm-commits@vger.kernel.org, pmladek@suse.com, rostedt@goodmis.org, sergey.senozhatsky@gmail.com, torvalds@linux-foundation.org, vbabka@suse.cz Subject: [patch 068/118] kfence: use error_report_end tracepoint Message-ID: <20210226011947.q-ylOvRJZ%akpm@linux-foundation.org> In-Reply-To: <20210225171452.713967e96554bb6a53e44a19@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Stat-Signature: dg3ofzxkiop6iz4yggc5zf9c95o88ht4 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 165F8C0001FE Received-SPF: none (linux-foundation.org>: No applicable sender policy available) receiver=imf14; identity=mailfrom; envelope-from=""; helo=mail.kernel.org; client-ip=198.145.29.99 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1614302381-811654 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: From: Alexander Potapenko Subject: kfence: use error_report_end tracepoint 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. Link: https://lkml.kernel.org/r/20210121131915.1331302-3-glider@google.com Signed-off-by: Alexander Potapenko Suggested-by: Marco Elver Cc: Andrey Konovalov Cc: Dmitry Vyukov Cc: Ingo Molnar Cc: Petr Mladek Cc: Steven Rostedt Cc: Sergey Senozhatsky Cc: Vlastimil Babka Cc: Greg Kroah-Hartman Signed-off-by: Andrew Morton --- mm/kfence/report.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/kfence/report.c~kfence-use-error_report_end-tracepoint +++ a/mm/kfence/report.c @@ -14,6 +14,7 @@ #include #include #include +#include #include @@ -248,6 +249,7 @@ void kfence_report_error(unsigned long a show_regs(regs); else dump_stack_print_info(KERN_ERR); + trace_error_report_end(ERROR_DETECTOR_KFENCE, address); pr_err("==================================================================\n"); lockdep_on(); _