INFO: task kworker/1:6:5542 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D stack:22344 pid:5542  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xaa9/0x2f10 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 unregister_netdev+0x12/0x30 net/core/dev.c:10955
 usbnet_disconnect+0xe6/0x510 drivers/net/usb/usbnet.c:1621
 usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458
 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+0x443/0x610 drivers/base/dd.c:1295
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x399/0xa30 drivers/base/core.c:3814
 usb_disable_device+0x360/0x7b0 drivers/usb/core/message.c:1420
 usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2238
 hub_port_connect drivers/usb/core/hub.c:5246 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x2073/0x4ed0 drivers/usb/core/hub.c:5793
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/9:
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc9000009fdb0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffffffff88d21da8
 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
1 lock held by rcu_tasks_kthre/12:
 #0: 
ffffffff87c9f270 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff87c9ef70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
6 locks held by kworker/1:1/25:
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc900001b7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: 
ffff8881063e7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
ffff8881063e7190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5739
 #3: ffff8881147a5190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #3: ffff8881147a5190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1005
 #4: ffff88811b8de160 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:837 [inline]
, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff88d21da8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x15/0x50 net/core/dev.c:10211
1 lock held by khungtaskd/28:
 #0: ffffffff87c9fe80 (
rcu_read_lock){....}-{1:2}
, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559
5 locks held by dhcpcd/2393:
2 locks held by getty/2413:
 #0: ffff888114840098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000452f0
 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
5 locks held by kworker/0:2/2460:
 #0: ffff88810da44538
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc900005e7db0
 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: 
ffff888106377190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
ffff888106377190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5739
 #3: ffff888106a75190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #3: ffff888106a75190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xff/0x8a0 drivers/usb/core/hub.c:2229
 #4: ffff88813b8e1160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #4: ffff88813b8e1160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88813b8e1160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
7 locks held by kworker/0:3/5244:
5 locks held by kworker/1:4/5284:
6 locks held by kworker/1:6/5542:
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff88810da44538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc900032a7db0
 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffff88810630f190 (&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5739
 #3: ffff888109e7f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #3: ffff888109e7f190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xff/0x8a0 drivers/usb/core/hub.c:2229
 #4: ffff88811ad36160 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:837 [inline]
, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
 #5: ffffffff88d21da8 (rtnl_mutex
){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:10955
3 locks held by kworker/0:4/9878:
 #0: ffff888100070d38 ((wq_completion)events
){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc90010347db0 ((work_completion)(&fw_work->work)
){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffffffff88d21da8
 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x15/0x50 net/core/dev.c:10211
5 locks held by kworker/1:0/14963:
3 locks held by kworker/1:9/14964:
 #0: ffff8881093b6538 ((wq_completion)ipv6_addrconf
){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc90002907db0
 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffffffff88d21da8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x273/0x2d0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5244 Comm: kworker/0:3 Not tainted 6.4.0-rc5-syzkaller-gd37537a1f7cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:hlock_class kernel/locking/lockdep.c:223 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4752 [inline]
RIP: 0010:__lock_acquire+0x460/0x5f30 kernel/locking/lockdep.c:5038
Code: fa 48 c1 ea 03 0f b6 04 02 84 c0 74 06 0f 8e 42 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 38 45 0f b6 a5 b8 00 00 00 <48> c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e 2b 13 00 00 45 0f
RSP: 0018:ffffc90000007a20 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff92000000f75 RCX: ffff88811bf9e2b8
RDX: 1ffffffff169988b RSI: 0000000000000008 RDI: ffffffff8b4cc458
RBP: ffff88811bf9d700 R08: 0000000000000000 R09: ffffffff8b4ca847
R10: fffffbfff1699508 R11: ffff8881f663b3c0 R12: 0000000000000002
R13: ffffffff8b4cc3a0 R14: ffff88811bf9e270 R15: ffff88811bf9e298
FS:  0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa27efed110 CR3: 000000010cb4d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5705 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
 rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 rcu_read_lock include/linux/rcupdate.h:773 [inline]
 select_task_rq_fair+0x290/0x3a60 kernel/sched/fair.c:7679
 select_task_rq kernel/sched/core.c:3579 [inline]
 try_to_wake_up+0x3d2/0x1ad0 kernel/sched/core.c:4292
 hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:1939
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5fa/0xbe0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8d/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1979 [inline]
RIP: 0010:vprintk_emit+0x3fe/0x600 kernel/printk/printk.c:2306
Code: 62 1b 00 48 85 db 0f 85 da 01 00 00 e8 6b 66 1b 00 31 ff 4c 89 f6 e8 a1 62 1b 00 4d 85 f6 74 06 e8 57 66 1b 00 fb f3 0f 1e fa <e8> 4d 66 1b 00 45 31 c9 41 b8 01 00 00 00 31 c9 68 7a c0 2f 81 ba
RSP: 0018:ffffc900017b6ba8 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000cd8e000
RDX: 0000000000040000 RSI: ffffffff812fc079 RDI: 0000000000000007
RBP: ffffc900017b6be0 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000057
R13: ffff888106a60000 R14: 0000000000000200 R15: ffffc900017b6c10
 dev_vprintk_emit drivers/base/core.c:4840 [inline]
 dev_printk_emit+0xda/0x120 drivers/base/core.c:4851
 __netdev_printk+0x1dd/0x470 net/core/dev.c:11263
 netdev_warn+0xdc/0x120 net/core/dev.c:11316
 asix_read_cmd+0x106/0x110 drivers/net/usb/asix_common.c:33
 asix_check_host_enable+0xce/0x230 drivers/net/usb/asix_common.c:102
 __asix_mdio_read+0x93/0x260 drivers/net/usb/asix_common.c:506
 asix_phy_reset+0x108/0x1f0 drivers/net/usb/asix_devices.c:215
 ax88172_bind+0x43b/0x5f0 drivers/net/usb/asix_devices.c:275
 usbnet_probe+0xae4/0x2850 drivers/net/usb/usbnet.c:1750
 usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:958
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x112d/0x1a40 drivers/base/core.c:3625
 usb_set_configuration+0x1196/0x1bc0 drivers/usb/core/message.c:2211
 usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238
 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:958
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x112d/0x1a40 drivers/base/core.c:3625
 usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5551 [inline]
 port_event drivers/usb/core/hub.c:5711 [inline]
 hub_event+0x2e3d/0x4ed0 drivers/usb/core/hub.c:5793
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>