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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 6B11BC433DF for ; Thu, 14 May 2020 16:31:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 491CF2065D for ; Thu, 14 May 2020 16:31:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="hEOVkHcX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726128AbgENQbw (ORCPT ); Thu, 14 May 2020 12:31:52 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:58616 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725973AbgENQbw (ORCPT ); Thu, 14 May 2020 12:31:52 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04EGQVUT016590; Thu, 14 May 2020 16:31:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=nANqSi2Q0m1t+eP0SLk3THs9oGj0soI3yk//uRnNE70=; b=hEOVkHcXj32/V6b6MB3lwAAN44IrxvE/LvvxO4Km4rdhziN/zMnOSzVKHN4azYpPlRxd 11XjvhvDux15hKkUjITrcxwQxbKbZBTGl7T4V4Q90t8gyqC5886Y8TIZ818TkRrIF4cp 8/qaJAji92yrp2XErfR1ivaRTs0ttW/WrrT6m+zlA3A7ARw7ueyHpCAd2eulRcYE3rsF bt1YwDnDSUbujXqUW1V2Ye+TnZ6QfIe9V+3quHv7MbwGo4LCp3NCu7rc2DN6n+WNJEQd Er/aELXNOF5rOcjGRHwD9VtQGNzVm3rQIjOcnv0qhA3bHLGUt1aG4LMMu89y4RQFFOP7 VQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2130.oracle.com with ESMTP id 3100yg3njp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 14 May 2020 16:31:08 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04EGMhYx027307; Thu, 14 May 2020 16:31:08 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3020.oracle.com with ESMTP id 3100ypn02r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 May 2020 16:31:08 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 04EGV46q008613; Thu, 14 May 2020 16:31:04 GMT Received: from [192.168.2.157] (/73.164.160.178) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 14 May 2020 09:31:04 -0700 Subject: Re: stable-rc 5.4: libhugetlbfs fallocate_stress.sh: Unable to handle kernel paging request at virtual address ffff00006772f000 To: Michal Hocko , Naresh Kamboju Cc: linux- stable , open list , linux-mm , Hugh Dickins , Naoya Horiguchi , "Aneesh Kumar K.V" , Andrea Arcangeli , "Kirill A.Shutemov" , Davidlohr Bueso , Prakash Sangappa , Andrew Morton , lkft-triage@lists.linaro.org, Arnd Bergmann , John Stultz References: <20200514064039.GY29153@dhcp22.suse.cz> From: Mike Kravetz Message-ID: Date: Thu, 14 May 2020 09:31:02 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200514064039.GY29153@dhcp22.suse.cz> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9621 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 adultscore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005140145 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9621 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 adultscore=0 cotscore=-2147483648 mlxscore=0 suspectscore=0 spamscore=0 impostorscore=0 mlxlogscore=999 malwarescore=0 clxscore=1011 phishscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005140145 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/13/20 11:40 PM, Michal Hocko wrote: > On Wed 13-05-20 23:11:40, Naresh Kamboju wrote: >> While running libhugetlbfs fallocate_stress.sh on stable-rc 5.4 branch kernel >> on arm64 hikey device. The following kernel Internal error: Oops: >> crash dump noticed. > > Is the same problem reproducible on vanilla 5.4 without any stable > patches? > Or, an earlier version of 5.4-stable? Nothing in the changelog for 5.4.41 looks related to this issue. There was an arm specific hugetlb change "arm64: hugetlb: avoid potential NULL dereference", but that is pretty straight forward. I'm guessing this may not reproduce easily. To help reproduce, you could change the #define FALLOCATE_ITERATIONS 100000 in .../libhugetlbfs/tests/fallocate_stress.c to a larger number to force the stress test to run longer. -- Mike Kravetz