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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2BD7BC433ED for ; Wed, 31 Mar 2021 22:04:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1EDA61029 for ; Wed, 31 Mar 2021 22:04:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229662AbhCaWDt (ORCPT ); Wed, 31 Mar 2021 18:03:49 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:4788 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229787AbhCaWDb (ORCPT ); Wed, 31 Mar 2021 18:03:31 -0400 Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 12VLYOGV115406; Wed, 31 Mar 2021 18:03:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=0s80tVd1/+xxWvcVo0goiNeMZ99Cty098sGMsWOUfWA=; b=gMd8e2A2WI19C72rRErzSgE+xcF0p/AHUSWZz7Y/rTUqBzK42r7yU4qaQBBRqWqwUpj9 Ig24PhBcbsp6DpcFccAiTuak0Os9aobR9yPISnIE5g4sbSvp9pOBdAsVWAR6PZ0QMVpp afjV7zYV9NP8CuYGpNktfBCiz5sY6gpdBe+e7o6ao1PY+hEqQ5D9Stvu1saBfNayLr87 h3k6GbLXes7nEyzcanRKgKc+HBUsZvF2ehG+S+YRc22zwXeBbRlaNPLPwrbzhiGQugFr lj4/ivczJeQzMiL6u2hpPTAFQeC9iGR8NCo0JUg7NG7d26kO235MJfDVl15jyE0jovON Bw== Received: from ppma05fra.de.ibm.com (6c.4a.5195.ip4.static.sl-reverse.com [149.81.74.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 37mnfte6wm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 Mar 2021 18:03:03 -0400 Received: from pps.filterd (ppma05fra.de.ibm.com [127.0.0.1]) by ppma05fra.de.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 12VM2UhQ007893; Wed, 31 Mar 2021 22:03:01 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma05fra.de.ibm.com with ESMTP id 37marxggjy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 Mar 2021 22:03:01 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 12VM2xM536766040 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 31 Mar 2021 22:02:59 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 25143A4051; Wed, 31 Mar 2021 22:02:59 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA5F8A4040; Wed, 31 Mar 2021 22:02:58 +0000 (GMT) Received: from localhost (unknown [9.171.77.178]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 31 Mar 2021 22:02:58 +0000 (GMT) Date: Thu, 1 Apr 2021 00:02:57 +0200 From: Vasily Gorbik To: Steven Rostedt Cc: Josef Bacik , linux-kernel@vger.kernel.org Subject: Re: User stacktrace garbage when USER_STACKTRACE_SUPPORT is not enabled Message-ID: References: <20210331103749.01a7c283@gandalf.local.home> <20210331170900.5f41bcd7@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210331170900.5f41bcd7@gandalf.local.home> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: xjcwSAf-x6Rd-Llh7mXPrt6UEX5AQwi1 X-Proofpoint-ORIG-GUID: xjcwSAf-x6Rd-Llh7mXPrt6UEX5AQwi1 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761 definitions=2021-03-31_10:2021-03-31,2021-03-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 spamscore=0 malwarescore=0 impostorscore=0 bulkscore=0 mlxlogscore=980 clxscore=1015 suspectscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2103300000 definitions=main-2103310148 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 31, 2021 at 05:09:00PM -0400, Steven Rostedt wrote: > On Wed, 31 Mar 2021 22:51:15 +0200 > Vasily Gorbik wrote: > > > It does! Thanks for the explanation and for the fix. I wonder why nobody > > noticed and complained about that since v5.6. > > Because it didn't lose data, just added extra junk. > > > > > Acked-by: Vasily Gorbik > > Want to give a "tested-by" too? I only tested it on s390 (manually + ftrace selftest), quite frankly. If it qualifies: Tested-by: Vasily Gorbik # s390 only