From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 D2DD514E2FC for ; Sat, 3 Aug 2024 14:35:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722695704; cv=none; b=QOiYtkpdJuEUhZFFizM3I7rKSLtXM9T90JJKZlLo0470qScJXmh3FYax1Hv91F80nOPHVA8tEqQug5KKmISuSo/rzG4IEqPPC8VO0Seki1CDzKDTHp468rTdP4ZgG131shPGpNDyqq8h7a/pXeJqYK6DfEWfVmwMCf559grEz0U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722695704; c=relaxed/simple; bh=JdgWNwwiTe5pPyMF4mkDnhwO5n2QhFjDyFPKOvNQe2g=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=GMh05RF87tTrRm3gpGrYlpMqKe5y3+62ZigeSq8Mv9tDQrO7i2Vb0bOLZnTvhzJZADcgmvX0LuMbbh6MJofLP8slPODwxsU4MulYnFQlXXyN483Fbtgm7t9L07pcTTsc4uo3ZWifw6s4Lzqn6dYX5X1+2sSbF2fmSrCc6gdWxnU= 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=209.85.166.200 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-il1-f200.google.com with SMTP id e9e14a558f8ab-396c41de481so147066015ab.3 for ; Sat, 03 Aug 2024 07:35:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722695702; x=1723300502; 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=pOX7iDSsj97sBQqRzELz1L0sHB1XuQ4x6QXvQoIlTxs=; b=KDDWhIpdlzkJk5lUzw3Jd1RcUBPj8oAeVqSwUQTH2H3sBMZ76D3JM+1L4K9UMhkL9C jZHF1xHN5KToenc/hLXWnp5EOyPTvInx82IMd0+9ghwb3jPWnacQw+NeMTSGsbq8TQBo XzcAdS40oxX9NJmPS6SD0F5YcWfSBf/l14XgtRXz1h3aMl3IORfFlmBmJ36RE+W285U1 oD2HMeUs2SoRn8lxM53K9jlTZQJSKXD7lek4fTnCa+1Ogne0ElDBcFKK/pQtwQd9xwgW vi8yYewFJ5EltkMW+sux8k2FCvjBoUlv87TUqSHHV+LXVA9punqCcT8qs9km7w1jmOaZ R3hA== X-Forwarded-Encrypted: i=1; AJvYcCU0P334yZ7FKSZYjC39YgnvzAcUmjwpGRgDhNVy3G+kD0l2oaHws8yYTvkLlwDREhVVaBQJ1AWgF4r2h8dgL5+4umXm49sEXavRrzrj X-Gm-Message-State: AOJu0YxLgEoCSugqnUuvmCJHEtDvdY5kpUIGo+3YnjLKVrm/XG5ZcVoP /GEaYMjOWHs00p5pnF8J9fYl+snmHFCDcfkHxaMoAMXLbwEA22wjr35RtTY0e4l9BXjGDaACEww TtzaXyVQk+czU2vvik1LV4mwiUfG8JL6VXm2dRkZD3QrLbZRy/IwWguE= X-Google-Smtp-Source: AGHT+IEk2tIEEFHEggOlrrgxjV9YPLsnZVfo3UKqoRwpR10rgQWMHhfYsP4sGAf0lYmYzNHK4O/0g5lyk2u3x5Peo5xHcLO358LD Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1b0f:b0:382:6a83:f4fc with SMTP id e9e14a558f8ab-39b1fc65098mr5205775ab.5.1722695702131; Sat, 03 Aug 2024 07:35:02 -0700 (PDT) Date: Sat, 03 Aug 2024 07:35:02 -0700 In-Reply-To: <20240803142426.d8uduX0h@linutronix.de> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000061c8a0061ec859b5@google.com> Subject: Re: [syzbot] [staging?] [usb?] WARNING in r8712_usb_write_mem/usb_submit_urb (2) From: syzbot To: florian.c.schilhabel@googlemail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-usb@vger.kernel.org, namcao@linutronix.de, 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 r871xu_dev_remove INFO: task kworker/1:1:28 blocked for more than 143 seconds. Not tainted 6.6.44-syzkaller-g721391060066-dirty #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:27456 pid:28 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0xca5/0x30d0 kernel/sched/core.c:6698 schedule+0xe7/0x1b0 kernel/sched/core.c:6772 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x5bd/0x9d0 kernel/locking/mutex.c:747 unregister_netdev+0x12/0x30 net/core/dev.c:11102 r871xu_dev_remove+0x291/0x480 drivers/staging/rtl8712/usb_intf.c:596 usb_unbind_interface+0x1e0/0x8d0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295 bus_remove_device+0x22f/0x420 drivers/base/bus.c:574 device_del+0x39d/0xa60 drivers/base/core.c:3838 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416 usb_disconnect+0x2e1/0x890 drivers/usb/core/hub.c:2276 hub_port_connect drivers/usb/core/hub.c:5329 [inline] hub_port_connect_change drivers/usb/core/hub.c:5629 [inline] port_event drivers/usb/core/hub.c:5789 [inline] hub_event+0x1be4/0x4f50 drivers/usb/core/hub.c:5871 process_one_work+0x889/0x15e0 kernel/workqueue.c:2631 process_scheduled_works kernel/workqueue.c:2704 [inline] worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2785 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:293 Showing all locks held in the system: 3 locks held by kworker/0:1/9: #0: ffff888109ba9138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2606 #1: ffffc9000009fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2607 #2: ffffffff89ad6da8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4684 6 locks held by kworker/1:1/28: #0: ffff88810a64fd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2606 #1: ffffc900001e7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2607 #2: ffff888104f2b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff888104f2b190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5817 #3: ffff888114cd9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #3: ffff888114cd9190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x890 drivers/usb/core/hub.c:2267 #4: ffff888100f5b160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #4: ffff888100f5b160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff888100f5b160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292 #5: ffffffff89ad6da8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11102 1 lock held by khungtaskd/29: #0: ffffffff888aece0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #0: ffffffff888aece0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #0: ffffffff888aece0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 1 lock held by kworker/u4:7/1043: #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1375 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1684 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x290/0x30d0 kernel/sched/core.c:6613 3 locks held by kworker/1:2/1939: #0: ffff888109ba9138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2606 #1: ffffc9000393fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2607 #2: ffffffff89ad6da8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4684 1 lock held by klogd/2494: #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1375 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1684 [inline] #0: ffff8881f653b318 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x290/0x30d0 kernel/sched/core.c:6613 2 locks held by dhcpcd/2543: #0: ffffffff89ad6da8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1d3/0x1f10 net/ipv4/devinet.c:1091 #1: ffff88811928cdb0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x840 drivers/staging/rtl8712/os_intfs.c:392 2 locks held by getty/2563: #0: ffff88810af530a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc9/0x1480 drivers/tty/n_tty.c:2216 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.44-syzkaller-g721391060066-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/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+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1b/0x30 drivers/acpi/processor_idle.c:111 Tested on: commit: 72139106 Linux 6.6.44 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.6.y console output: https://syzkaller.appspot.com/x/log.txt?x=17be7b65980000 kernel config: https://syzkaller.appspot.com/x/.config?x=cc2e57d9f035477b dashboard link: https://syzkaller.appspot.com/bug?extid=ca2eaaadab55de6a5a42 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=11be7b65980000