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[2604:1380:40f1:3f00::1]) by mx.google.com with ESMTPS id w1-20020a17090abc0100b00294731fbed3si2885581pjr.146.2024.01.27.18.31.18 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 27 Jan 2024 18:31:19 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-41513-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1; Authentication-Results: mx.google.com; arc=pass (i=1 spf=pass spfdomain=m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com); spf=pass (google.com: domain of linux-kernel+bounces-41513-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-41513-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sy.mirrors.kernel.org (Postfix) with ESMTPS id 4C340B2233D for ; Sun, 28 Jan 2024 02:31:15 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 284153C17; Sun, 28 Jan 2024 02:31:07 +0000 (UTC) Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98DC81870 for ; Sun, 28 Jan 2024 02:31:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706409066; cv=none; b=nUQV2sk2Mhm82MMPpNYC9HNGJkA7CaoiQkAcbU9FtCQB6AxSzUeg/nZltZfE0f7epiuZwEgRfvzRz+8eBhEiokVjkJPpYlaXUKBiS9N1kKnF9AqYk305jvtIbQxqRhwoWpy2HNeiheB/2SHPkntjrXoqVaXWyQ+85EKEGZN/7A8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706409066; c=relaxed/simple; bh=9+kbmVpHUlGsSxXRiBjq1W8fezdVTHIyEXuJlGeG8mY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZtcxNRXinHroLDd+ZAoxTKUeUWl8VHL9CKrNumF957kJeVZ4BpLhrQVBbYWhCpcsVwcU0VYmBtCpiciEVDd6P7wm/ZuSv1LljeO5ajJJ9XVe1q/0AAX9H5r2HxKzsgQPw3pJfSd8jhmAcWF6XQyGnOWfcwZHZ+kg8+Xp16WwPQQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f69.google.com with SMTP id ca18e2360f4ac-7bef5e512b6so117785439f.2 for ; Sat, 27 Jan 2024 18:31:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706409063; x=1707013863; 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=iSY5gv8IVMSW8VEja74zYCb05fjIi9MIplNS8r2Jtbs=; b=gJ61J7XLjU+MQBYa3+edG3YVX+HpFp1bfXu4/SJdKyouPNqyKQz2FqrEzMBhlawbFM p0ZgDggdV9Hz7ufzNDbmPkbsI949TYaiuD1Dve4F640pngFfFOE9LEXTana0EVaKnZf4 CHi0MNMima2myVZk4qCYj2sIWqVoQXopfkJiSJN7kWvjUPKjm+HN3sDXnBh/7kL+Ca1g sLADlQjpNdsCvbQWOKwl0vUBWkl7hCnbDa4zlVtW7jfGHnWst++Jy/fDGUa2oamjcFsv pm+mEKUiK9Zw/0J9VPdRAoEn4AfH/IVk6S97+JWwatTzXCeHltCSdABL6ZauNXyxP7Rn S6+A== X-Gm-Message-State: AOJu0Yz8W+a4mpNmNYM4PlM8dlKQX/q5ETEkd9DqSbqjCv3ZIKg1Qi2x 2xjf691hksIkmCThgdzolyX9CU62vwKwu+bNLnkRMOEHILp0v0il8tXfO9nKMqfASEPtvqDpHjj eV71Bn/ivGPofHLtCaIccNImRGaT0YRiBiAy/0n5cbFP8p6LzCuTvsFA= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:154b:b0:363:757c:cc78 with SMTP id j11-20020a056e02154b00b00363757ccc78mr186152ilu.2.1706409063686; Sat, 27 Jan 2024 18:31:03 -0800 (PST) Date: Sat, 27 Jan 2024 18:31:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001529bf060ff852b9@google.com> Subject: Re: [syzbot] [bluetooth?] INFO: task hung in hci_conn_failed From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in hci_conn_failed INFO: task kworker/u5:2:5062 blocked for more than 143 seconds. Not tainted 6.8.0-rc1-syzkaller-g8a696a29c690-dirty #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:2 state:D stack:27840 pid:5062 tgid:5062 ppid:2 flags:0x00004000 Workqueue: hci5 hci_cmd_sync_work Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0xf12/0x5c00 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:752 hci_connect_cfm include/net/bluetooth/hci_core.h:1983 [inline] hci_conn_failed+0x158/0x370 net/bluetooth/hci_conn.c:1289 hci_abort_conn_sync+0x7f8/0xb70 net/bluetooth/hci_sync.c:5356 abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2988 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Showing all locks held in the system: 2 locks held by kworker/0:1/9: 2 locks held by kworker/u4:0/11: #0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc90000107d80 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 3 locks held by kworker/1:1/27: 1 lock held by khungtaskd/29: #0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d1acba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 6 locks held by kworker/u5:0/51: #0: ffff88802a730d38 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc90000bc7d80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 #2: ffff888020989060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:305 #3: ffff888020988078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x150/0xb70 net/bluetooth/hci_sync.c:5337 #4: ffffffff8ef23348 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1983 [inline] #4: ffffffff8ef23348 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x158/0x370 net/bluetooth/hci_conn.c:1289 #5: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #5: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ff/0x800 kernel/rcu/tree_exp.h:995 3 locks held by kworker/1:2/779: #0: ffff8880b993ccd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559 #1: ffffc900038c7d80 ((work_completion)(&aux->work)#2){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 #2: ffff888052984c80 (&aux->poke_mutex){+.+.}-{3:3}, at: __fd_array_map_delete_elem+0x125/0x2f0 kernel/bpf/arraymap.c:884 2 locks held by kworker/u4:7/2797: 2 locks held by kworker/u4:9/2812: #0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc9000a05fd80 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 5 locks held by kworker/u5:1/4456: #0: ffff888021b4a138 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc9000d7dfd80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 #2: ffff88806a001060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:305 #3: ffff88806a000078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x150/0xb70 net/bluetooth/hci_sync.c:5337 #4: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #4: ffffffff8d1b83f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ff/0x800 kernel/rcu/tree_exp.h:995 3 locks held by udevd/4512: 2 locks held by getty/4813: #0: ffff88802e7980a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 5 locks held by kworker/u5:2/5062: #0: ffff88802271a938 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc900041cfd80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 #2: ffff888019ff1060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:305 #3: ffff888019ff0078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x150/0xb70 net/bluetooth/hci_sync.c:5337 #4: ffffffff8ef23348 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1983 [inline] #4: ffffffff8ef23348 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x158/0x370 net/bluetooth/hci_conn.c:1289 2 locks held by kworker/0:3/5070: 2 locks held by kworker/1:4/5071: #0: ffff8880b993ccd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559 #1: ffff8880b9928a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988 3 locks held by kworker/1:5/5493: 3 locks held by kworker/1:6/5497: 3 locks held by kworker/0:6/5520: 2 locks held by kworker/0:8/5525: #0: ffff8880b983ccd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559 #1: ffff8880b9828a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988 1 lock held by dhcpcd/20169: #0: ffff8880581ba130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff8880581ba130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf50 net/packet/af_packet.c:3202 1 lock held by syz-executor.0/21114: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-g8a696a29c690-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21128 Comm: syz-executor.4 Not tainted 6.8.0-rc1-syzkaller-g8a696a29c690-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:get_current arch/x86/include/asm/current.h:42 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:206 Code: 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa <65> 48 8b 14 25 80 c2 03 00 65 8b 05 b4 9e 7b 7e a9 00 01 ff 00 48 RSP: 0018:ffffc9000433fa10 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff824e81f8 RDX: ffff88807efe5940 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88801ea65000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff888010bb03f0 R12: ffff8880625f1f68 R13: ffff88807e228b40 R14: ffff88814960b000 R15: ffff8880625f1f8c FS: 0000555556c83480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f925bd01404 CR3: 000000004b197000 CR4: 0000000000350ef0 Call Trace: bh2jh include/linux/jbd2.h:338 [inline] jbd2_journal_dirty_metadata+0x85/0xd60 fs/jbd2/transaction.c:1514 __ext4_handle_dirty_metadata+0x16e/0x8e0 fs/ext4/ext4_jbd2.c:354 __ext4_new_inode+0x1bed/0x5200 fs/ext4/ialloc.c:1234 ext4_symlink+0x5d7/0xa20 fs/ext4/namei.c:3396 vfs_symlink fs/namei.c:4480 [inline] vfs_symlink+0x3e4/0x620 fs/namei.c:4464 do_symlinkat+0x25f/0x310 fs/namei.c:4506 __do_sys_symlinkat fs/namei.c:4522 [inline] __se_sys_symlinkat fs/namei.c:4519 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4519 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f925bc7c527 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffb3e6e518 EFLAGS: 00000202 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 00007fffb3e6e5e0 RCX: 00007f925bc7c527 RDX: 00007f925bcc951b RSI: 00000000ffffff9c RDI: 00007f925bcc850e RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 Tested on: commit: 8a696a29 Merge tag 'platform-drivers-x86-v6.8-2' of gi.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=10300d80180000 kernel config: https://syzkaller.appspot.com/x/.config?x=bc36d99546fe9035 dashboard link: https://syzkaller.appspot.com/bug?extid=a984066a63e9c1e62662 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1609e64be80000