INFO: task kworker/0:1:12 blocked for more than 143 seconds.
      Not tainted 5.4.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:1     D24992    12      2 0x80004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 schedule+0xca/0x250 kernel/sched/core.c:4136
 schedule_timeout+0x682/0xb20 kernel/time/timer.c:1871
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x26f/0x3c0 kernel/sched/completion.c:136
 kthread_stop+0x10c/0x610 kernel/kthread.c:559
 dvb_ca_en50221_release+0x91/0x200 drivers/media/dvb-core/dvb_ca_en50221.c:1934
 tt3650_ci_uninit drivers/media/usb/dvb-usb/pctv452e.c:364 [inline]
 pctv452e_usb_disconnect+0xb0/0xf0 drivers/media/usb/dvb-usb/pctv452e.c:1061
 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1134 [inline]
 device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1165
 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:532
 device_del+0x420/0xb20 drivers/base/core.c:2376
 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2200
 hub_port_connect drivers/usb/core/hub.c:5035 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5324 [inline]
 port_event drivers/usb/core/hub.c:5470 [inline]
 hub_event+0x16f2/0x3800 drivers/usb/core/hub.c:5552
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Showing all locks held in the system:
5 locks held by kworker/0:0/5:
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240
 #1: ffff8881da1dfdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244
 #2: ffff8881d5128200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #2: ffff8881d5128200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 drivers/usb/core/hub.c:5498
 #3: ffff8881af91d200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #3: ffff8881af91d200 (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:871
 #4: ffff8881d549fc60 (hcd->bandwidth_mutex){+.+.}, at: usb_set_configuration+0x492/0x1670 drivers/usb/core/message.c:1886
5 locks held by kworker/0:1/12:
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240
 #1: ffff8881da227dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244
 #2: ffff8881d51bd200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #2: ffff8881d51bd200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 drivers/usb/core/hub.c:5498
 #3: ffff8881cc3fb200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #3: ffff8881cc3fb200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 drivers/usb/core/hub.c:2191
 #4: ffff8881ca91c190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1162
5 locks held by kworker/1:0/17:
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240
 #1: ffff8881da267dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244
 #2: ffff8881d5196200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #2: ffff8881d5196200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 drivers/usb/core/hub.c:5498
 #3: ffff8881d51b8520 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2997 [inline]
 #3: ffff8881d51b8520 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5115 [inline]
 #3: ffff8881d51b8520 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5324 [inline]
 #3: ffff8881d51b8520 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5470 [inline]
 #3: ffff8881d51b8520 (&port_dev->status_lock){+.+.}, at: hub_event+0x1c06/0x3800 drivers/usb/core/hub.c:5552
 #4: ffff8881d5143160 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b6/0x2d30 drivers/usb/core/hub.c:4539
1 lock held by khungtaskd/22:
 #0: ffffffff86cfe8a0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5335
1 lock held by rsyslogd/1599:
 #0: ffff8881d306a5e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:801
2 locks held by getty/1689:
 #0: ffff8881d199f090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004612e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1690:
 #0: ffff8881d1aea090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004792e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1691:
 #0: ffff8881d14e5090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004752e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1692:
 #0: ffff8881d1aeb090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc9000047d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1693:
 #0: ffff8881d1ae9090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004712e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1694:
 #0: ffff8881d24c6090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004592e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
2 locks held by getty/1695:
 #0: ffff8881d227f090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
 #1: ffffc900004452e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156
3 locks held by kworker/0:3/3256:
6 locks held by kworker/1:3/3276:
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8881d8f3e128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240
 #1: ffff8881cf19fdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244
 #2: ffff8881d5109200 (&dev->mutex){....}, at: device_lock include/linux/device.h:1462 [inline]
 #2: ffff8881d5109200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 drivers/usb/core/hub.c:5498
 #3: ffff8881d510b520 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2997 [inline]
 #3: ffff8881d510b520 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5115 [inline]
 #3: ffff8881d510b520 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5324 [inline]
 #3: ffff8881d510b520 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5470 [inline]
 #3: ffff8881d510b520 (&port_dev->status_lock){+.+.}, at: hub_event+0x1c06/0x3800 drivers/usb/core/hub.c:5552
 #4: ffff8881d549f860 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b6/0x2d30 drivers/usb/core/hub.c:4539
 #5: ffff8881db331e58 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1215 [inline]
 #5: ffff8881db331e58 (&rq->lock){-.-.}, at: __schedule+0x21c/0x1ca0 kernel/sched/core.c:4017
3 locks held by kworker/0:4/3286:
3 locks held by kworker/0:7/4352:
5 locks held by kdvb-ca-0:0/4366:
1 lock held by syz-executor.5/6047:
 #0: ffff8881d35d0060 (&uhid->devlock){+.+.}, at: uhid_char_write+0x6d/0xf07 drivers/hid/uhid.c:711

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 22 Comm: khungtaskd Not tainted 5.4.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x55/0x96 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0x9a4/0xe50 kernel/hung_task.c:289
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4366 Comm: kdvb-ca-0:0 Not tainted 5.4.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:____rb_erase_color lib/rbtree.c:262 [inline]
RIP: 0010:rb_erase+0x2f1/0x19b0 lib/rbtree.c:445
Code: 8d 7c 24 08 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 ca 0e 00 00 4d 8b 74 24 08 4d 85 f6 74 1b 4c 89 f0 48 c1 e8 03 80 3c 18 00 <0f> 85 bb 0c 00 00 41 f6 06 01 0f 84 3a 09 00 00 4d 85 ed 74 1c 4c
RSP: 0018:ffff8881db309d80 EFLAGS: 00000046
RAX: 1ffff1103a15bf5c RBX: dffffc0000000000 RCX: 1ffff1103b664b79
RDX: ffffed103b664b78 RSI: ffff8881db325bc0 RDI: ffff8881ceb97dd8
RBP: ffff8881b021fdd0 R08: ffff8881b021fdd8 R09: ffff8881ceb97de0
R10: ffffed103b66658c R11: ffff8881db332c63 R12: ffff8881ceb97dd0
R13: ffff8881b1c07dd0 R14: ffff8881d0adfae0 R15: ffff8881db325bc0
FS:  0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001180 CR3: 00000001d3c23000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rb_erase_cached include/linux/rbtree.h:149 [inline]
 timerqueue_del+0x7f/0x150 lib/timerqueue.c:67
 __remove_hrtimer+0x99/0x1a0 kernel/time/hrtimer.c:995
 __run_hrtimer kernel/time/hrtimer.c:1496 [inline]
 __hrtimer_run_queues+0x276/0xc60 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x2e8/0x730 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xf5/0x500 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1751 [inline]
RIP: 0010:vprintk_emit+0x3cd/0x3e0 kernel/printk/printk.c:1995
Code: 00 83 fb ff 75 d6 e9 db fc ff ff e8 9d 7b 15 00 e8 68 a8 1a 00 41 56 9d e9 b1 fd ff ff e8 8b 7b 15 00 e8 56 a8 1a 00 41 56 9d <e9> 2a ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89
RSP: 0018:ffff8881aeec7aa8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000200 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881d1a2e84c
RBP: ffff8881aeec7af0 R08: ffff8881d1a2e000 R09: fffffbfff11aafbe
R10: fffffbfff11aafbd R11: ffffffff88d57def R12: 0000000000000027
R13: ffff8881da27c800 R14: 0000000000000293 R15: 0000000000000000
 vprintk_func+0x75/0x113 kernel/printk/printk_safe.c:386
 printk+0xba/0xed kernel/printk/printk.c:2056
 dvb_usb_generic_rw.cold+0x33/0x56 drivers/media/usb/dvb-usb/dvb-usb-urb.c:36
 tt3650_ci_msg+0x1b1/0x2f0 drivers/media/usb/dvb-usb/pctv452e.c:126
 tt3650_ci_msg_locked+0x83/0xb0 drivers/media/usb/dvb-usb/pctv452e.c:157
 tt3650_ci_poll_slot_status+0x90/0x110 drivers/media/usb/dvb-usb/pctv452e.c:333
 dvb_ca_en50221_check_camstatus+0x102/0x330 drivers/media/dvb-core/dvb_ca_en50221.c:234
 dvb_ca_en50221_thread_state_machine drivers/media/dvb-core/dvb_ca_en50221.c:1128 [inline]
 dvb_ca_en50221_thread+0x26b/0x13e0 drivers/media/dvb-core/dvb_ca_en50221.c:1317
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352