INFO: task kworker/0:2:1108 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D
 stack:24944 pid: 1108 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11c3/0x4350 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0xbd/0x2d0 kernel/time/timer.c:2093
 do_wait_for_common+0x295/0x460 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 kthread_stop+0x16e/0x540 kernel/kthread.c:666
 hwrng_unregister+0x231/0x2b0 drivers/char/hw_random/core.c:559
 chaoskey_disconnect+0x8e/0x260 drivers/usb/misc/chaoskey.c:234
 usb_unbind_interface+0x203/0x870 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1249 [inline]
 device_release_driver_internal+0x487/0x710 drivers/base/dd.c:1282
 bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
 device_del+0x63f/0xa80 drivers/base/core.c:3615
 usb_disable_device+0x3e7/0x8a0 drivers/usb/core/message.c:1472
 usb_disconnect+0x33c/0x8a0 drivers/usb/core/hub.c:2292
 hub_port_connect drivers/usb/core/hub.c:5346 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5642 [inline]
 port_event drivers/usb/core/hub.c:5804 [inline]
 hub_event+0x1d64/0x5260 drivers/usb/core/hub.c:5886
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
 #0: 
ffff888016c79138
 (
(wq_completion)events_unbound
){+.+.}-{0:0}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:475
 #1: ffff8880b9127888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x517/0x810 kernel/sched/psi.c:891
1 lock held by khungtaskd/27:
 #0: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:1/144:
5 locks held by kworker/0:2/1108:
 #0: ffff88814479fd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
 #1: ffffc9000541fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
 #2: ffff8881481c4220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline]
 #2: ffff8881481c4220 (&dev->mutex){....}-{3:3}, at: hub_event+0x178/0x5260 drivers/usb/core/hub.c:5832
 #3: ffff8880201c2220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline]
 #3: ffff8880201c2220 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xf8/0x8a0 drivers/usb/core/hub.c:2283
 #4: ffff88801eacd1a8 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:809 [inline]
, at: __device_driver_lock drivers/base/dd.c:1064 [inline]
, at: device_release_driver_internal+0xa1/0x710 drivers/base/dd.c:1279
3 locks held by dhcpcd/3851:
2 locks held by getty/3941:
 #0: ffff88802c3a7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}
, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158
4 locks held by syz-executor/4195:
4 locks held by kworker/1:11/5243:
 #0: ffff8880b913a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:475
 #1: ffff8880b9127888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x517/0x810 kernel/sched/psi.c:891
 #2: ffff8880b9127eb8 (krc.lock){..-.}-{2:2}, at: kfree_rcu_monitor+0x29/0x6e0 kernel/rcu/tree.c:3382
 #3: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312
2 locks held by kworker/0:12/6379:
1 lock held by syz.1.761/6654:
 #0: ffff8881481c4220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline]
 #0: ffff8881481c4220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x14e/0x7a0 drivers/usb/core/devio.c:1040
2 locks held by syz-executor/9429:
 #0: ffff88805ec720e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
 #1: 
ffffffff8c3239e8
 (
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
2 locks held by dhcpcd-run-hook/10324:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xe1b/0xe60 kernel/hung_task.c:369
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6379 Comm: kworker/0:12 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:check_preemption_disabled+0x46/0x110 lib/smp_processor_id.c:55
Code: d0 40 76 65 8b 0d a2 2a 41 76 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 <5b> 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24
RSP: 0018:ffffc90000007be8 EFLAGS: 00000086
RAX: 0000000000000000 RBX: ffff8880b903a340 RCX: 67f3b9a3c25fa500
RDX: 0000000000010000 RSI: ffffffff8a7a48a0 RDI: ffffffff8a7a4860
RBP: ffff88801dd18080 R08: ffff8880b903a343 R09: 1ffff11017207468
R10: dffffc0000000000 R11: ffffed1017207469 R12: dffffc0000000000
R13: 1ffff11017207613 R14: ffffffff8be396d8 R15: ffffffff8be3f820
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f760cfac368 CR3: 000000002bd54000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_event_task_tick+0x18/0x9b0 kernel/events/core.c:4360
 scheduler_tick+0x244/0x4f0 kernel/sched/core.c:5330
 update_process_times+0x1c7/0x200 kernel/time/timer.c:2026
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:console_trylock_spinning+0x301/0x370 kernel/printk/printk.c:1909
Code: 85 db 74 89 e8 30 f2 18 00 fb 31 c0 eb 48 e8 26 f2 18 00 e8 71 12 61 08 48 85 db 74 d1 e8 17 f2 18 00 fb 48 c7 c7 a0 3a 31 8c <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 68 8a 22 60
RSP: 0018:ffffc9000375f320 EFLAGS: 00000283
RAX: ffffffff81602289 RBX: 0000000000000200 RCX: 0000000000100000
RDX: ffffc900102ce000 RSI: 000000000007955a RDI: ffffffff8c313aa0
RBP: ffffc9000375f3f0 R08: ffffffff901f1137 R09: 1ffffffff203e226
R10: dffffc0000000000 R11: fffffbfff203e227 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff920006ebe64
 vprintk_emit+0xa7/0x150 kernel/printk/printk.c:2273
 _printk+0xda/0x130 kernel/printk/printk.c:2299
 __dynamic_pr_debug+0x196/0x240 lib/dynamic_debug.c:619
 kobject_uevent_env+0x83b/0x890 lib/kobject_uevent.c:-1
 device_del+0x8e5/0xa80 drivers/base/core.c:3637
 device_unregister+0x1c/0xc0 drivers/base/core.c:3660
 usb_remove_ep_devs+0x4c/0x80 drivers/usb/core/endpoint.c:188
 remove_intf_ep_devs drivers/usb/core/message.c:1320 [inline]
 usb_disable_device+0x368/0x8a0 drivers/usb/core/message.c:1471
 usb_disconnect+0x33c/0x8a0 drivers/usb/core/hub.c:2292
 hub_port_connect drivers/usb/core/hub.c:5346 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5642 [inline]
 port_event drivers/usb/core/hub.c:5804 [inline]
 hub_event+0x1d64/0x5260 drivers/usb/core/hub.c:5886
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 process_scheduled_works kernel/workqueue.c:2373 [inline]
 worker_thread+0xd93/0x12a0 kernel/workqueue.c:2459
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
nf_conntrack: new packet for ffff888077357200
nf_nat: Already setup manip DST for ct ffff888077357200 (status bits 0x188)
nf_nat: Already setup manip SRC for ct ffff888077357200 (status bits 0x188)
geneve1: no route to fc00:0000:0000:0000:0000:0000:0000:0001