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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 3BA29C33C9E for ; Thu, 30 Jan 2020 11:11:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 161CE2063A for ; Thu, 30 Jan 2020 11:11:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727158AbgA3LLI (ORCPT ); Thu, 30 Jan 2020 06:11:08 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:8306 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726902AbgA3LLH (ORCPT ); Thu, 30 Jan 2020 06:11:07 -0500 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00UB9cEU025698 for ; Thu, 30 Jan 2020 06:11:06 -0500 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0b-001b2d01.pphosted.com with ESMTP id 2xtfh1u6j8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 30 Jan 2020 06:11:06 -0500 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 30 Jan 2020 11:11:01 -0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00UBB0w642467410 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Jan 2020 11:11:00 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 82E9642042; Thu, 30 Jan 2020 11:11:00 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 97A5442047; Thu, 30 Jan 2020 11:10:59 +0000 (GMT) Received: from linux.ibm.com (unknown [9.148.8.154]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 30 Jan 2020 11:10:59 +0000 (GMT) Date: Thu, 30 Jan 2020 13:10:57 +0200 From: Mike Rapoport To: Borislav Petkov Cc: Damian Tometzki , Linus Torvalds , "Luck, Tony" , Ingo Molnar , Linux Kernel Mailing List , Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Andrew Morton Subject: Re: [GIT PULL] x86/asm changes for v5.6 References: <20200128165906.GA67781@gmail.com> <20200129132618.GA30979@zn.tnic> <20200129170725.GA21265@agluck-desk2.amr.corp.intel.com> <20200129183404.GB30979@zn.tnic> <20200130075549.GA6684@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200130075549.GA6684@zn.tnic> X-TM-AS-GCONF: 00 x-cbid: 20013011-0020-0000-0000-000003A5714E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20013011-0021-0000-0000-000021FD2636 Message-Id: <20200130111057.GA21459@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-30_03:2020-01-28,2020-01-30 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=772 bulkscore=0 malwarescore=0 spamscore=0 phishscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2001300081 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 30, 2020 at 08:55:49AM +0100, Borislav Petkov wrote: > Hello Damian, > > On Thu, Jan 30, 2020 at 06:47:14AM +0100, Damian Tometzki wrote: > > in my qemu env the system isnt coming up. I tried both with and without the > > changes from Borislav. > > in the future, please do not hijack the thread like that but start a new > one or open a bug on bugzilla.kernel.org. Your issue is something else. > > > 0.605193] ------------[ cut here ]------------ > > [ 0.605933] General protection fault in user access. Non-canonical > > address? > > There it is. > > > [ 0.605948] WARNING: CPU: 0 PID: 1 at arch/x86/mm/extable.c:77 > > ex_handler_uaccess+0x48/0x50 > > [ 0.606931] Modules linked in: > > [ 0.606931] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.5.0 #15 > > [ 0.606931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > > rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014 > > [ 0.606931] RIP: 0010:ex_handler_uaccess+0x48/0x50 ... > It looks like dquot_init->register_sysctl_table-> ... does copy_to_user > at some point and it goes off into the weeds and %rsi becomes > non-canonical. > > Please start a new thread or open a bug and upload your .config and > dmesg. We'll continue debugging that there. Maybe that won't be needed. It seems that this a random boot crash caused by 987f028b8637cfa7 ("char: hpet: Use flexible-array member") and fix is on the way: https://lore.kernel.org/lkml/202001300450.00U4ocvS083098@www262.sakura.ne.jp/ > Thx. > > -- > Regards/Gruss, > Boris. > > SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg -- Sincerely yours, Mike.