From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760567AbcAKPAK (ORCPT ); Mon, 11 Jan 2016 10:00:10 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41040 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760511AbcAKPAI (ORCPT ); Mon, 11 Jan 2016 10:00:08 -0500 Date: Mon, 11 Jan 2016 13:00:07 -0200 From: Arnaldo Carvalho de Melo To: Sergei Shtylyov Cc: Wang Nan , acme@kernel.org, linux-kernel@vger.kernel.org, pi3orama@163.com, lizefan@huawei.com, netdev@vger.kernel.org, davem@davemloft.net, He Kuang , Jiri Olsa , Masami Hiramatsu , Namhyung Kim Subject: Re: [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read Message-ID: <20160111150007.GD21083@redhat.com> References: <1452520124-2073-1-git-send-email-wangnan0@huawei.com> <1452520124-2073-43-git-send-email-wangnan0@huawei.com> <5693BA78.70606@cogentembedded.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5693BA78.70606@cogentembedded.com> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.20 (2009-12-10) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Mon, Jan 11, 2016 at 05:21:44PM +0300, Sergei Shtylyov escreveu: > On 01/11/2016 04:48 PM, Wang Nan wrote: > > size = head - old; > >+ if (size > (unsigned long)(md->mask) + 1) { > >+ WARN_ONCE(1, "WARNING: failed to keep up with mmap data. (warn only once)\n"); > > WARNING is already printed by WARN*(), no? No, at least not in tools/include/asm/bug.h, perhaps include/asm/bug.h has this now and tools/ drifted? Checking now... - Arnaldo