INFO: task kworker/0:5:5347 blocked for more than 143 seconds.
Not tainted 6.7.0-rc5-syzkaller-ge9158c7e5533 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5 state:D stack:22816 pid:5347 tgid:5347 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xc71/0x3050 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747
unregister_netdev+0x12/0x30 net/core/dev.c:11113
r871xu_dev_remove+0x28e/0x480 drivers/staging/rtl8712/usb_intf.c:596
usb_unbind_interface+0x1dd/0x8d0 drivers/usb/core/driver.c:461
device_remove drivers/base/dd.c:569 [inline]
device_remove+0x11f/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+0x22c/0x420 drivers/base/bus.c:574
device_del+0x39a/0xa50 drivers/base/core.c:3814
usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416
usb_disconnect+0x2e1/0x910 drivers/usb/core/hub.c:2257
hub_port_connect drivers/usb/core/hub.c:5305 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5605 [inline]
port_event drivers/usb/core/hub.c:5765 [inline]
hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5847
process_one_work+0x884/0x15c0 kernel/workqueue.c:2627
process_scheduled_works kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
kthread+0x33c/0x440 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:
6 locks held by kworker/0:1/9:
#0: ffff88810a66c138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc9000009fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffff888105f4d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105f4d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5793
#3: ffff88811513f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#3: ffff88811513f190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff888141d32160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff888141d32160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10348
1 lock held by khungtaskd/29:
#0: ffffffff87ead320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff87ead320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff87ead320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by dhcpcd/2432:
#0: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1d3/0x1f00 net/ipv4/devinet.c:1091
#1: ffff888118f44db0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x820 drivers/staging/rtl8712/os_intfs.c:392
2 locks held by getty/2452:
#0: ffff88810abe60a0 (&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+0xfc6/0x1490 drivers/tty/n_tty.c:2201
4 locks held by udevd/5248:
#0: ffff88810b36b2f0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
#1: ffff88810f300888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
#2: ffff888104b722c0 (kn->active#18){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
#3: ffff88811212c190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
#3: ffff88811212c190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:2/5268:
#0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc900020efd80 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10348
3 locks held by kworker/0:3/5290:
#0: ffff88810a753938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc900021dfd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4679
6 locks held by kworker/1:4/5310:
#0: ffff88810a66c138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc9000210fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffff888105b5e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105b5e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5793
#3: ffff8881191e7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#3: ffff8881191e7190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#4: ffff8881421e8160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff8881421e8160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10348
5 locks held by kworker/1:5/5314:
#0: ffff88810a66c138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc900022bfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffff888105b7e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105b7e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5793
#3: ffff88811212c190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#3: ffff88811212c190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x910 drivers/usb/core/hub.c:2248
#4: ffff88811cd47160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff88811cd47160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88811cd47160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
6 locks held by kworker/0:5/5347:
#0: ffff88810a66c138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc9000217fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffff888105f48190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105f48190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5793
#3: ffff8881154bf190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#3: ffff8881154bf190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x910 drivers/usb/core/hub.c:2248
#4: ffff8881047fc160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff8881047fc160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff8881047fc160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
#5: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11113
4 locks held by udevd/5543:
#0: ffff888104a67c30 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
#1: ffff8881190ec888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
#2: ffff8881199062c0 (kn->active#21){.+.+}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
#3: ffff8881191e7190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
#3: ffff8881191e7190 (&dev->mutex){....}-{3:3}, at: serial_show+0x26/0xa0 drivers/usb/core/sysfs.c:143
3 locks held by kworker/1:6/5641:
#0: ffff88810a753938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2602
#1: ffffc9000ce6fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2603
#2: ffffffff88facae8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4679
4 locks held by udevd/7524:
#0: ffff888111c052f0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
#1: ffff888118c50088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
#2: ffff88810427fcb8 (kn->active#21){.+.+}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
#3: ffff88811513f190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
#3: ffff88811513f190 (&dev->mutex){....}-{3:3}, at: serial_show+0x26/0xa0 drivers/usb/core/sysfs.c:143
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc5-syzkaller-ge9158c7e5533 #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+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x26c/0x2d0 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+0x33c/0x440 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 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/0x20 drivers/acpi/processor_idle.c:112