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=-7.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,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 A2CDEC15504 for ; Thu, 4 Mar 2021 00:17:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8002A64F41 for ; Thu, 4 Mar 2021 00:17:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231300AbhCCX7n (ORCPT ); Wed, 3 Mar 2021 18:59:43 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:29877 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234328AbhCCLmM (ORCPT ); Wed, 3 Mar 2021 06:42:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614771639; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WCfj/IdYiX5hh1kSfgYnluMWA7KXC90R6NsWIPre0IU=; b=HBVL+/OjAD9ZsoQhlnF/iBKnZ9qq4TH2HjAWkkyiv3AvEK7pZaPg9brt5FnSMCUCl/lJvn kn08pvUJfG1xfMy27xYLoHvTJ9bVvkTMs74cMe3HwrfZus7/Vddl7f3B9Er5/IX5H6uPEZ 628JmPYJ7Hw6B2PCSCNwlRwT4bkLiU0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-142-WaMgdSZ6MemmT9VJqrHiuQ-1; Wed, 03 Mar 2021 06:40:37 -0500 X-MC-Unique: WaMgdSZ6MemmT9VJqrHiuQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C91DD107ACE3; Wed, 3 Mar 2021 11:40:35 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-197.pek2.redhat.com [10.72.12.197]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8FD4660C5E; Wed, 3 Mar 2021 11:40:33 +0000 (UTC) Subject: Re: [bug report]null pointer at scsi_mq_exit_request+0x14 with blktests srp/015 To: Bart Van Assche , Chaitanya Kulkarni , "linux-scsi@vger.kernel.org" , "linux-rdma@vger.kernel.org" , linux-block References: <418155251.14154941.1614505772200.JavaMail.zimbra@redhat.com> <8b1fc0cd-196a-ad78-71c6-a7515ffbb4ad@redhat.com> <4d188158-3f18-c801-02ca-97350eb10c1b@acm.org> From: Yi Zhang Message-ID: <70398f13-aefa-8de2-f6fe-bcfbfb20fcae@redhat.com> Date: Wed, 3 Mar 2021 19:40:24 +0800 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: <4d188158-3f18-c801-02ca-97350eb10c1b@acm.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On 3/2/21 11:59 AM, Bart Van Assche wrote: > On 3/1/21 7:36 AM, Yi Zhang wrote: >> This issue cannot be reproduced on latest 5.12.0-rc1. >> >> Please ignore this report, sorry for the noise. > How about rerunning the same test against v5.11.2, the latest v5.11 > stable kernel? I think your report means that v5.11 can be improved... I tried on stable kernel 5.11.2/5.10.19, and all reproduced, here is the log 5.11.2  https://pastebin.com/hG4iBETG 5.10.19  https://pastebin.com/ExFbQMdg It' not 100% reproduced and sometimes can be reproduced within 20 times' testing. I tried bisect, but unfortunately my attempts don't land on anything that looks like the real culprit. :( > Thanks, > > Bart. >