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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FE46C46467 for ; Tue, 17 Jan 2023 02:25:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234945AbjAQCZV (ORCPT ); Mon, 16 Jan 2023 21:25:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235119AbjAQCZR (ORCPT ); Mon, 16 Jan 2023 21:25:17 -0500 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4E8423DB7 for ; Mon, 16 Jan 2023 18:25:16 -0800 (PST) Received: by mail-il1-f199.google.com with SMTP id k7-20020a056e02156700b0030f025aeca3so3070896ilu.12 for ; Mon, 16 Jan 2023 18:25:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=akdLHauNdr8pjJDaxuTYeV8CfYSNE8Mipw5+gZJ8v3k=; b=Q6hwP/E6Y0RupOioOUmi+RmS3VYA9xt+Ej2m5IDskh/DojMwfGD0eJif0jwNjH1e0s s5rkqzTAgff8ZY0TvZT6NHs7TqamohiL7npd4bl0MNVYQ+1BV1Y6hT7DRs97Lf8PjW4+ 3/wzyNYTlns7o3lkDfxXsyG+BjnP2U3/9EIQW0CdLThMhLnytdimAuNcFAFblRIm6QWV 0HsUTnTq+7/gk/U0Q4JiTWXPtHH1rMlBoLhrmHIhe1nS/SaEAI7OT/EKyF3BYEfsMDvD R8z6etIi0LlF/jaQ+DYVasRT9uOneKIXr74gZzJlMO0byIh3zaIYByWgjXHpU1o+PvtS 5gOA== X-Gm-Message-State: AFqh2kpWTvHQ4jC67vETX0uvZHg6f5fUfZKmd2xRp8ylpj8zcz6lNcZ8 OQqi7Cu8aTJlxapLanrm+sU9OPpZIInd3+5zOoK26SOHw5Sg X-Google-Smtp-Source: AMrXdXsOmMkVSB/fBreXL3EX4W3TgKbt8fDj13/yzTGb4IjFn24kmSqFIPsbqsNWYZuOd5Zr/Gi9rFalH+nYEFz002Z6vNueLbmi MIME-Version: 1.0 X-Received: by 2002:a05:6638:4199:b0:363:ae32:346f with SMTP id az25-20020a056638419900b00363ae32346fmr110217jab.31.1673922316166; Mon, 16 Jan 2023 18:25:16 -0800 (PST) Date: Mon, 16 Jan 2023 18:25:16 -0800 In-Reply-To: <20230117004337.2132-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000096b8305f26c6981@google.com> Subject: Re: [syzbot] possible deadlock in lapb_disconnect_request From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: MAX_LOCKDEP_CHAINS too low! BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 5160 Comm: kworker/u4:6 Not tainted 6.2.0-rc3-syzkaller-00017-g358a161a6a9e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bond594 bond_netdev_notify_work Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lookup_chain_cache_add kernel/locking/lockdep.c:3778 [inline] validate_chain kernel/locking/lockdep.c:3799 [inline] __lock_acquire+0xf2c/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 debug_object_activate+0x6c/0x30c lib/debugobjects.c:665 debug_timer_activate kernel/time/timer.c:782 [inline] __mod_timer+0x534/0x700 kernel/time/timer.c:1119 add_timer+0x34/0x50 kernel/time/timer.c:1244 __queue_delayed_work kernel/workqueue.c:1676 [inline] queue_delayed_work_on+0x130/0x240 kernel/workqueue.c:1701 queue_delayed_work include/linux/workqueue.h:518 [inline] bond_netdev_notify_work+0xc8/0xf4 drivers/net/bonding/bond_main.c:1743 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 Tested on: commit: 358a161a Merge branch 'for-next/fixes' into for-kernelci git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=17830e7e480000 kernel config: https://syzkaller.appspot.com/x/.config?x=2573056c6a11f00d dashboard link: https://syzkaller.appspot.com/bug?extid=c9450e09c6b15886782c compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=161144da480000