INFO: task kworker/0:3:5230 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:21872 pid:5230  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
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_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
 unregister_netdev+0x12/0x30 net/core/dev.c:11011
 r871xu_dev_remove+0x28e/0x480 drivers/staging/rtl8712/usb_intf.c:596
 usb_unbind_interface+0x1dd/0x8d0 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+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:3811
 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416
 usb_disconnect+0x2e1/0x890 drivers/usb/core/hub.c:2252
 hub_port_connect drivers/usb/core/hub.c:5280 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
 port_event drivers/usb/core/hub.c:5740 [inline]
 hub_event+0x1be0/0x4f30 drivers/usb/core/hub.c:5822
 process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
 kthread+0x33a/0x430 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:
6 locks held by kworker/1:0/22:
 #0: ffff88810a664538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
 #1: ffffc9000017fd88 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
 #2: ffff88810671b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff88810671b190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
 #3: ffff888119b41190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff888119b41190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff88811cd38160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88811cd38160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x2136/0x42c0 net/mac80211/main.c:1335
1 lock held by khungtaskd/29:
 #0: ffffffff87eac820 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6607
2 locks held by dhcpcd/2423:
 #0: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1d3/0x1f00 net/ipv4/devinet.c:1091
 #1: ffff88810abe4db0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x820 drivers/staging/rtl8712/os_intfs.c:392
2 locks held by getty/2443:
 #0: ffff88810b3270a0 (&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/0:3/5230:
 #0: ffff88810a664538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
 #1: ffffc90001b9fd88 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
 #2: ffff888106333190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888106333190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
 #3: ffff88810f7df190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88810f7df190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x890 drivers/usb/core/hub.c:2243
 #4: ffff88810f7de160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88810f7de160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88810f7de160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
 #5: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11011
5 locks held by kworker/0:4/5283:
3 locks held by kworker/0:5/5284:
 #0: ffff888109f49938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
 #1: ffffc90001c3fd88 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
 #2: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4667
3 locks held by kworker/1:3/5319:
 #0: ffff888109f49938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
 #1: ffffc900020c7d88 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
 #2: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4667
6 locks held by kworker/1:5/5321:
 #0: ffff88810a664538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x774/0x15d0 kernel/workqueue.c:2602
 #1: ffffc900020ffd88 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a7/0x15d0 kernel/workqueue.c:2605
 #2: ffff888106313190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888106313190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768
 #3: ffff88812003d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88812003d190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff8881083cd160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff8881083cd160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff88fae7e8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10264
5 locks held by kworker/0:2/14433:
4 locks held by udevd/24249:
 #0: ffff888111f09418 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
 #1: ffff888105f01888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
 #2: ffff88811dc8a008 (kn->active#29){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
 #3: ffff88812003d190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
 #3: ffff88812003d190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/25053:
 #0: ffff88810730fb08 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
 #1: ffff88814145c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x460 fs/kernfs/file.c:154
 #2: ffff88810634bcb8 (kn->active#29){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x460 fs/kernfs/file.c:155
 #3: ffff88813ddbc190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:997 [inline]
 #3: ffff88813ddbc190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-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+0xfac/0x1230 kernel/hung_task.c:379
 kthread+0x33a/0x430 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: 2515 Comm: syz-executor.2 Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:103 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5749 [inline]
RIP: 0010:lock_acquire+0x159/0x510 kernel/locking/lockdep.c:5718
Code: e9 03 0f b6 0c 01 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 75 03 00 00 8b 92 7c 0a 00 00 85 d2 0f 85 d2 00 00 00 9c <8f> 44 24 08 48 8b 6c 24 08 fa 48 c7 c7 00 cb 87 86 e8 c1 c0 18 05
RSP: 0018:ffffc9000161f9c8 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 1ffff920002c3f3c RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86a649a0 RDI: ffff88810835c47c
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff126634a
R10: ffffffff89331a57 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff88247000 R15: 0000000000000000
FS:  0000555557128480(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc4c69e08 CR3: 00000001403d3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 debug_objects_fill_pool lib/debugobjects.c:614 [inline]
 debug_object_activate+0x144/0x490 lib/debugobjects.c:713
 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x23/0x310 kernel/time/hrtimer.c:1087
 __hrtimer_start_range_ns kernel/time/hrtimer.c:1261 [inline]
 hrtimer_start_range_ns+0x7c0/0xdb0 kernel/time/hrtimer.c:1301
 hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1968 [inline]
 do_nanosleep+0x1f2/0x500 kernel/time/hrtimer.c:2044
 hrtimer_nanosleep+0x1ae/0x440 kernel/time/hrtimer.c:2100
 common_nsleep+0xa1/0xc0 kernel/time/posix-timers.c:1350
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
 __x64_sys_clock_nanosleep+0x344/0x490 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f824ffc5eb3
Code: 00 00 00 00 0f 1f 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 4e 40 0d 00 00 74 14 b8 e6 00 00 00 0f 05 <f7> d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007ffdf339c798 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000aa2 RCX: 00007f824ffc5eb3
RDX: 00007ffdf339c7b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffdf339c83c R08: 0000000000000864 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032
R13: 000000000020c37a R14: 000000000020c37a R15: 0000000000000000
 </TASK>