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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS,URIBL_BLOCKED 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 E0071C43381 for ; Sun, 31 Mar 2019 02:17:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9D2E20881 for ; Sun, 31 Mar 2019 02:17:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731101AbfCaCRO (ORCPT ); Sat, 30 Mar 2019 22:17:14 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:39771 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731056AbfCaCRO (ORCPT ); Sat, 30 Mar 2019 22:17:14 -0400 Received: by mail-pf1-f196.google.com with SMTP id i17so2835060pfo.6; Sat, 30 Mar 2019 19:17:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=o5pIJAmR+NlZr3xNA0ww47lgwBmrJL95RImLVOx7RsU=; b=D5ti0qYGmaszJHFeQdgS2Y5JCulYxCeQMcnedmqYhNL2CSLCcWJQYQbA/r/2Vi0KOe GXZU+7gQA4Um+Ldxm0uqPDxuAHzsH/seFEbwwIJwkkrII2Z8F6VqO+9PmuCcz83AO3zx WR9LkxC8nMCyYCZC2XCJZo7NCFnjYfg+dtiO28DfYvmFDiNYKOB7a/3ZtXrybcifEdRF 7YiEZ7p4D9pWqMin2r88W/zXZk4JOcp+xckbHVmI2jQJDM9FMsaPSxi7tnXjDd7fZ09b +3kmU2IKMmfGeRnL/lTjlOEL0RIJn5K5W+jKdHIejZow0gvY4RJr5dJ5s/5wovwtqloe Jtyw== X-Gm-Message-State: APjAAAUZUytqkmeeJNr4lQ9CBItVNgoScRuQ/LeipYD0TunKMN6AD54n DUAfMsCGmkuotEf/Q4fq0sI= X-Google-Smtp-Source: APXvYqyhMHuYINmBljhmnl61h8hamyffthGOmM6sEzAGki3F3bK1JyYEyK6j+kcAQRVQPGCK7yCx5w== X-Received: by 2002:a65:5202:: with SMTP id o2mr32904749pgp.402.1553998633172; Sat, 30 Mar 2019 19:17:13 -0700 (PDT) Received: from asus.site ([2601:647:4000:5dd1:a41e:80b4:deb3:fb66]) by smtp.gmail.com with ESMTPSA id e23sm8878231pfd.11.2019.03.30.19.17.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 30 Mar 2019 19:17:11 -0700 (PDT) Subject: Re: BUG: MAX_STACK_TRACE_ENTRIES too low! (2) To: syzbot , akpm@linux-foundation.org, danitg@mellanox.com, darrick.wong@oracle.com, dledford@redhat.com, gustavo@embeddedor.com, jannh@google.com, jgg@ziepe.ca, johannes.berg@intel.com, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-xfs@vger.kernel.org, longman@redhat.com, mingo@kernel.org, paulmck@linux.vnet.ibm.com, peterz@infradead.org, roland@purestorage.com, shamir.rabinovitch@oracle.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tj@kernel.org, torvalds@linux-foundation.org, will.deacon@arm.com, xiyou.wangcong@gmail.com, Dmitry Vyukov References: <00000000000089a718058556e1d8@google.com> From: Bart Van Assche Message-ID: Date: Sat, 30 Mar 2019 19:17:09 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.2 MIME-Version: 1.0 In-Reply-To: <00000000000089a718058556e1d8@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/30/19 2:58 PM, syzbot wrote: > syzbot has bisected this bug to: > > commit 669de8bda87b92ab9a2fc663b3f5743c2ad1ae9f > Author: Bart Van Assche > Date:   Thu Feb 14 23:00:54 2019 +0000 > >     kernel/workqueue: Use dynamic lockdep keys for workqueues > > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17f1bacd200000 > start commit:   0e40da3e Merge tag 'kbuild-fixes-v5.1' of > git://git.kernel.. > git tree:       upstream > final crash:    https://syzkaller.appspot.com/x/report.txt?x=1409bacd200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=1009bacd200000 > kernel config:  https://syzkaller.appspot.com/x/.config?x=8dcdce25ea72bedf > dashboard link: > https://syzkaller.appspot.com/bug?extid=6f39a9deb697359fe520 > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10e1bacd200000 > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1120fe0f200000 > > Reported-by: syzbot+6f39a9deb697359fe520@syzkaller.appspotmail.com > Fixes: 669de8bda87b ("kernel/workqueue: Use dynamic lockdep keys for > workqueues") > > For information about bisection process see: > https://goo.gl/tpsmEJ#bisection Hi Dmitry, This bisection result doesn't make sense to me. As one can see, the message "BUG: MAX_STACK_TRACE_ENTRIES too low!" does not occur in the console output the above console output URL points at. Bart.