INFO: task kworker/1:7:11552 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7     state:D stack:23008 pid:11552 ppid:2      flags:0x00004000
Workqueue: events console_callback

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xc79/0x30a0 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143
 ___down_common kernel/locking/semaphore.c:225 [inline]
 __down_common+0x327/0x6c0 kernel/locking/semaphore.c:246
 down+0x74/0xa0 kernel/locking/semaphore.c:63
 console_lock+0x96/0x150 kernel/printk/printk.c:2652
 console_callback+0x63/0x4c0 drivers/tty/vt/vt.c:2933
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 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:304
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/1:0/22:
 #0: 
ffff88810a25a938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc9000017fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffff888105fbe190 (&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
1 lock held by khungtaskd/29:
 #0: ffffffff87eac820 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff87eac820 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff87eac820 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/2445:
 #0: ffff88810bb320a0 (&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+0xfc5/0x1480 drivers/tty/n_tty.c:2206
6 locks held by kworker/0:3/5242:
2 locks held by kworker/1:5/5322:
4 locks held by kworker/0:8/9157:
2 locks held by kworker/1:7/11552:
 #0: ffff888100070d38
 ((wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc9000e3cfd80
 (console_work
){+.+.}-{0:0}
, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
6 locks held by kworker/0:11/16389:
4 locks held by udevd/22706:
 #0: ffff8881f673b558
 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline]
 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1681 [inline]
 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x290/0x30a0 kernel/sched/core.c:6612
 #1: 
ffff888141219d58
 (
&ep->lock){...-}-{2:2}, at: ep_done_scan+0x2e/0x590 fs/eventpoll.c:638
 #2: ffff888115848558 (&ep->lock){...-}-{2:2}, at: ep_poll_callback+0xd1/0xc10 fs/eventpoll.c:1176
 #3: ffff8881158484a8
 (&ep->wq
){..-.}-{2:2}
, at: __wake_up_common_lock+0xbb/0x140 kernel/sched/wait.c:137
3 locks held by kworker/1:2/23103:
4 locks held by udevd/23659:
 #0: ffff888134a50790
 (&p->lock
){+.+.}-{3:3}
, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
 #1: 
ffff888118ecd488
 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
 #2: 
ffff8881408eeae8 (kn->active#22){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
 #3: ffff88811c08e190 (
&dev->mutex
){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:15/24030:
 #0: ffff8881f673b558 (&rq->__lock
){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline]
){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1372 [inline]
){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1681 [inline]
){-.-.}-{2:2}, at: __schedule+0x290/0x30a0 kernel/sched/core.c:6612
 #1: ffffc90003bffd80 (
(work_completion)(&dev->power.work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
 #2: ffff8881063bf218
 (&dev->power.lock
){-.-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
){-.-.}-{2:2}, at: rpm_idle+0x5f3/0x6e0 drivers/base/power/runtime.c:527

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __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:304
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18984 Comm: kworker/1:11 Not tainted 6.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:418
Code: ed c8 fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 6c 59 15 ff eb a6 e8 c5 59 15 ff eb e3
RSP: 0018:ffffc90002f57748 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82848600 RDI: ffffffff8c156ee0
RBP: ffffffff8c156ea0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 205d393254202020 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff182ae2e R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81805ca6be CR3: 000000010ef2d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 serial_in drivers/tty/serial/8250/8250.h:117 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
 wait_for_lsr+0xd7/0x180 drivers/tty/serial/8250/8250_port.c:2086
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3371 [inline]
 serial8250_console_write+0xce5/0x1060 drivers/tty/serial/8250/8250_port.c:3449
 console_emit_next_record kernel/printk/printk.c:2910 [inline]
 console_flush_all+0x4eb/0xfb0 kernel/printk/printk.c:2966
 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035
 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307
 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
 _printk+0xc8/0x100 kernel/printk/printk.c:2332
 m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
 m920x_rc_query+0x496/0x760 drivers/media/usb/dvb-usb/m920x.c:193
 legacy_dvb_usb_read_remote_control+0x107/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 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:304
 </TASK>