From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757603AbcBADYe (ORCPT ); Sun, 31 Jan 2016 22:24:34 -0500 Received: from szxga02-in.huawei.com ([119.145.14.65]:2317 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752488AbcBADYc (ORCPT ); Sun, 31 Jan 2016 22:24:32 -0500 Message-ID: <56AECFCD.3050708@huawei.com> Date: Mon, 1 Feb 2016 11:23:57 +0800 From: "Wangnan (F)" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Tong Zhang , , CC: LKML Subject: Re: [PATCH 1/1] broken perf tool on 4.4-rc1 References: <1454187764-12498-1-git-send-email-ztong@vt.edu> <56AEC026.2080509@huawei.com> In-Reply-To: <56AEC026.2080509@huawei.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.111.66.109] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A0B0202.56AECFDB.00A8,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: eb3c912e86e8a9f9e80d37ca6c2a6eff Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2016/2/1 10:17, Wangnan (F) wrote: > > > On 2016/1/31 5:02, Tong Zhang wrote: >> reproduce: >> lzto@objd ~ $ ~/linux/tools/perf/perf record -I -e >> intel_pt/tsc=1,noretcomp=1/u /bin/ls >> lzto@objd ~ $ ~/linux/tools/perf/perf script -F >> event,comm,pid,tid,time,addr,ip,sym,dso,iregs >> Segmentation fault >> lzto@objd ~ $ >> >> Upon further investigation, it seems that >> commit 747a9b0a08ae ("Merge branch 'perf-urgent-for-linus' of >> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip") >> breaks perf tool. >> >> __list_del(): tools/include/linux/list.h does not check null pointer >> dereference > > I don't have a Boradwell system, unable to reproduce the fault. > Now I find one. The stack is: #0 __list_del (next=0x1a12440, prev=0x0) at /home/w00229757/kernel-hydrogen/tools/include/linux/list.h:89 #1 __list_del_entry (entry=0x1a12440) at /home/w00229757/kernel-hydrogen/tools/include/linux/list.h:101 #2 list_del_init (entry=0x1a12440) at /home/w00229757/kernel-hydrogen/tools/include/linux/list.h:144 #3 thread__put (thread=0x1a12440) at util/thread.c:104 #4 0x0000000000502e99 in __thread__zput (thread=0x1a12330) at util/thread.h:49 #5 intel_pt_process_auxtrace_info (event=, session=0x19f88d0) at util/intel-pt.c:2156 #6 0x00000000004c75a0 in perf_session__process_user_event (file_offset=584, event=0x7ffff7fa6248, session=0x19f88d0) at util/session.c:1353 #7 perf_session__process_event (session=session@entry=0x19f88d0, event=event@entry=0x7ffff7fa6248, file_offset=file_offset@entry=584) at util/session.c:1472 #8 0x00000000004c9907 in __perf_session__process_events (file_size=273984, data_size=, data_offset=, session=0x19f88d0) at util/session.c:1825 #9 perf_session__process_events (session=0x19f88d0) at util/session.c:1875 #10 0x00000000004554b0 in __cmd_script (script=0x7fffffffd440) at builtin-script.c:1049 #11 cmd_script (argc=, argv=, prefix=) at builtin-script.c:2226 #12 0x0000000000482ed1 in run_builtin (p=p@entry=0x907cc8 , argc=argc@entry=3, argv=argv@entry=0x7fffffffe5c0) at perf.c:390 #13 0x0000000000433a96 in handle_internal_command (argv=0x7fffffffe5c0, argc=3) at perf.c:451 #14 run_argv (argv=0x7fffffffe340, argcp=0x7fffffffe34c) at perf.c:495 #15 main (argc=3, argv=0x7fffffffe5c0) at perf.c:618 Please have a look at patch: http://lkml.kernel.org/g/1454296865-19749-1-git-send-email-wangnan0@huawei.com You should have in the cc-list. Thank you.