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,UNPARSEABLE_RELAY,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 4C81DC4332E for ; Fri, 20 Mar 2020 13:11:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 20D8320754 for ; Fri, 20 Mar 2020 13:11:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="dYoSpqPS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727142AbgCTNL0 (ORCPT ); Fri, 20 Mar 2020 09:11:26 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:55622 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727020AbgCTNL0 (ORCPT ); Fri, 20 Mar 2020 09:11:26 -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 02KD93xi101941; Fri, 20 Mar 2020 13:10:39 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=WZogALVCjFYD0ujEHa6o7WFcojU+a7djrPH0TQV1rJc=; b=dYoSpqPStpS2osCPBxAsRXDbBMgRNq9Ss0FbTmpZQzXp7mf+x9BNaN8suNHlj8M0wGCC jZkV1qUUQyo3dZP1GpbaFBjBhnwXALyPZ2PGbZU7l6DKyvsiF/kHaVO55ggT/WICadm7 z0r5kD10xKNR+48DxbPHXlurHOC08HhFfnmCoIaqNq/JeYsaFW1Odnr/q1TBzLab6RHB iRMBwtIv+Qp796F30loFHimgJIdbL9ytH8AJE5v2P2r8yURFsC/FpiJIJW/nMMqaZgDy pBDpShbZTR4qNFVp7ZhWS9kIIa81HO/sbwIX3T7154JlyToX1TjxqQXGqiApfZAi2Zv2 KA== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2130.oracle.com with ESMTP id 2yrpprnmx8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 20 Mar 2020 13:10:39 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 02KCoq0t029359; Fri, 20 Mar 2020 13:08:38 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3030.oracle.com with ESMTP id 2ys8rpu84a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 20 Mar 2020 13:08:38 +0000 Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 02KD8VuH015319; Fri, 20 Mar 2020 13:08:31 GMT Received: from kadam (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 20 Mar 2020 06:08:30 -0700 Date: Fri, 20 Mar 2020 16:08:22 +0300 From: Dan Carpenter To: Dmitry Vyukov Cc: "Paul E. McKenney" , syzbot , Josh Triplett , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Joel Fernandes , rcu@vger.kernel.org, LKML , syzkaller-bugs Subject: Re: linux-next build error (8) Message-ID: <20200320130822.GF4650@kadam> References: <000000000000ae2ab305a123f146@google.com> <20200318214109.GV3199@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9565 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 bulkscore=0 phishscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003200056 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9565 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 bulkscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 clxscore=1011 impostorscore=0 priorityscore=1501 spamscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003200056 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 19, 2020 at 08:13:35AM +0100, 'Dmitry Vyukov' via syzkaller-bugs wrote: > On Wed, Mar 18, 2020 at 10:41 PM Paul E. McKenney wrote: > > > > On Wed, Mar 18, 2020 at 09:54:07PM +0100, Dmitry Vyukov wrote: > > > On Wed, Mar 18, 2020 at 5:57 PM syzbot > > > wrote: > > > > > > > > Hello, > > > > > > > > syzbot found the following crash on: > > > > > > > > HEAD commit: 47780d78 Add linux-next specific files for 20200318 > > > > git tree: linux-next > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=14228745e00000 > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=b68b7b89ad96c62a > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=792dec47d693ccdc05a0 > > > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > > > > > > > Unfortunately, I don't have any reproducer for this crash yet. > > > > > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > > > Reported-by: syzbot+792dec47d693ccdc05a0@syzkaller.appspotmail.com > > > > > > > > kernel/rcu/tasks.h:1070:37: error: 'rcu_tasks_rude' undeclared (first use in this function); did you mean 'rcu_tasks_qs'? > > > > > > +rcu maintainers > > > > The kbuild test robot beat you to it, and apologies for the hassle. > > Fixed in -rcu on current "dev" branch. > > If the kernel dev process would only have a way to avoid dups from all > test systems... We could make a mailing list for recording it, and then just grep the mailbox for the file and function. Or we could just assume that kbuild is going to find almost all the build errors. regards, dan carpenter