INFO: task kworker/1:8:5214 blocked for more than 150 seconds.
      Not tainted 6.9.0-rc6-next-20240503-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8     state:D
 stack:24336 pid:5214  tgid:5214  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 device_lock include/linux/device.h:990 [inline]
 usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2296
 hub_port_connect drivers/usb/core/hub.c:5362 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5662 [inline]
 port_event drivers/usb/core/hub.c:5822 [inline]
 hub_event+0x1eb9/0x5150 drivers/usb/core/hub.c:5904
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/0:0/8:
5 locks held by kworker/0:1/9:
1 lock held by khungtaskd/30:
 #0: ffffffff8e333de0 (rcu_read_lock){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:839 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/1:1/45:
 #0: 
ffff888015080948
 (
(wq_completion)events){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3206 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90000b57d00 ((linkwatch_work).work){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
5 locks held by kworker/u8:4/61:
3 locks held by kworker/1:2/1661:
 #0: ffff888015081948
 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc9000541fd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc9000541fd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xea0 net/wireless/reg.c:2478
3 locks held by kworker/u8:6/2396:
 #0: 
ffff88802a25a148
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90009b97d00
 (
(work_completion)(&(&net->ipv6.addr_chk_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffffffff8f5e4dc8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
7 locks held by kworker/u8:9/2832:
 #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: 
ffffc9000a6e7d00
 (
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3207 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffffffff8f5d84d0
 (
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
 #3: ffff8880151ae0e8
 (
&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506
 #4: ffff88807d61b250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline]
 #4: ffff88807d61b250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #4: ffff88807d61b250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506
 #5: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x69/0x400 drivers/net/netdevsim/netdev.c:586
 #6: ffffffff8e1ce3f0 (cpu_hotplug_lock
){++++}-{0:0}
, at: flush_all_backlogs net/core/dev.c:5984 [inline]
, at: unregister_netdevice_many_notify+0x607/0x16e0 net/core/dev.c:11202
3 locks held by kworker/1:3/4838:
 #0: ffff888015081948 ((wq_completion)events_power_efficient){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3206 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: 
ffffc9000326fd00 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
ffffc9000326fd00 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffffffff8f5e4dc8 (rtnl_mutex
){+.+.}-{3:3}
, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:540
2 locks held by getty/4853:
 #0: ffff88802f1090a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/u9:4/5118:
 #0: ffff888069bae948
 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90003d0fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc90003d0fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: 
ffff888067f71060
 (
&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309
1 lock held by syz-executor.3/5122:
 #0: 
ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
5 locks held by kworker/0:4/5169:
9 locks held by kworker/0:8/5199:
4 locks held by kworker/1:8/5214:
 #0: 
ffff88801ca8b948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
ffff88801ca8b948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90004827d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc90004827d00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffff88802407f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88802407f190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5850
 #3: ffff88805c33a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #3: ffff88805c33a190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2296
4 locks held by udevd/5224:
 #0: 
ffff88807f3c1b08 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182
 #1: ffff88807c910488 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
 #2: ffff88807bbfaf08 (kn->active#18){.+.+}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
 #3: ffff88807bf0a190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:995 [inline]
 #3: ffff88807bf0a190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
1 lock held by syz-executor.0/5414:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.4/5425:
 #0: ffffffff8f5e4dc8
 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.1/5431:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.3/5434:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.2/5437:
 #0: 
ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt+0x9e4/0x3630 net/ipv6/ipv6_sockglue.c:567
1 lock held by syz-executor.0/5439:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.4/5443:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.1/5445:
 #0: 
ffffffff8f5e4dc8
 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591
1 lock held by syz-executor.2/5448:
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5e4dc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6591

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

NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-rc6-next-20240503-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
usb 5-1: RX USB error -71.
NMI backtrace for cpu 0
CPU: 0 PID: 5199 Comm: kworker/0:8 Not tainted 6.9.0-rc6-next-20240503-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events kfree_rcu_work
RIP: 0010:delay_tsc+0x87/0xe0 arch/x86/lib/delay.c:73
Code: 01 00 00 00 e8 8a 7e df f5 e8 95 f6 03 00 41 39 c7 75 20 0f 01 f9 90 90 48 89 d5 48 c1 e5 20 48 09 c5 48 29 dd 49 39 ee 77 be <eb> 23 e8 92 9c 7a f5 eb ca 49 29 ee e8 68 f6 03 00 41 89 c7 0f 01
RSP: 0018:ffffc90000005658 EFLAGS: 00000087
RAX: 000000007826328b RBX: 0000008178262974 RCX: 0000000000000000
RDX: 0000000000000081 RSI: ffffffff8c1fd060 RDI: ffffffff8c1fd020
RBP: 0000000000000917 R08: ffffffff853eeaea R09: 1ffff11004015046
R10: dffffc0000000000 R11: ffffffff8b861340 R12: dffffc0000000000
R13: 00000000000026a6 R14: 0000000000000899 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc3e8cae68 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 wait_for_lsr drivers/tty/serial/8250/8250_port.c:2074 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
 serial8250_console_write+0x104e/0x1770 drivers/tty/serial/8250/8250_port.c:3393
 console_emit_next_record kernel/printk/printk.c:2928 [inline]
 console_flush_all+0x865/0xfd0 kernel/printk/printk.c:2994
 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3063
 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345
 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4942
 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4953
 _dev_err+0x122/0x170 drivers/base/core.c:5008
 ar5523_cmd_rx_cb+0x467/0xa30 drivers/net/wireless/ath/ar5523/ar5523.c:102
 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648
 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x5a5/0xd50 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x502/0x2a00 arch/x86/kernel/unwind_orc.c:494
Code: e8 3f 48 01 c8 48 83 e0 fe 49 8d 5c 45 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 34 48 63 2b <48> 01 dd 48 89 ef 4c 89 f6 e8 d0 33 55 00 48 8d 43 04 4c 39 f5 4c
RSP: 0018:ffffc90000006688 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8fc520c4 RCX: dffffc0000000000
RDX: 0000000080000101 RSI: ffffffff81f03d7d RDI: ffffffff81f03d5e
RBP: fffffffff22b1c9e R08: ffffffff8140e470 R09: ffffc90000006850
R10: 0000000000000003 R11: ffffffff8181e6e0 R12: ffffffff8fc520cc
R13: ffffffff8fc520c0 R14: ffffffff81f03d7d R15: ffffffff8fc520bc
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8d/0x810 mm/page_owner.c:325
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696
 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:271 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2264
 allocate_slab+0x5a/0x2e0 mm/slub.c:2427
 new_slab mm/slub.c:2480 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666
 __slab_alloc+0x58/0xa0 mm/slub.c:3756
 __slab_alloc_node mm/slub.c:3809 [inline]
 slab_alloc_node mm/slub.c:3988 [inline]
 __do_kmalloc_node mm/slub.c:4120 [inline]
 __kmalloc_noprof+0x25e/0x410 mm/slub.c:4134
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 cfg80211_inform_single_bss_data+0xc8c/0x2330 net/wireless/scan.c:2249
 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3101
 cfg80211_inform_bss_frame_data+0x3bc/0x720 net/wireless/scan.c:3191
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5221 [inline]
 ieee80211_rx_list+0x2b00/0x3780 net/mac80211/rx.c:5458
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5481
 ieee80211_rx include/net/mac80211.h:5093 [inline]
 ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438
 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785
 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:debug_rcu_bhead_unqueue kernel/rcu/tree.c:3317 [inline]
RIP: 0010:kvfree_rcu_bulk+0xee/0x4e0 kernel/rcu/tree.c:3395
Code: 03 48 89 ef 48 c7 c6 60 cc cb 8b e8 cc c6 39 03 49 c1 e5 20 48 b8 00 00 00 00 01 00 00 00 49 01 c5 49 c1 fd 20 41 80 3c 1e 00 <74> 9b 4c 89 e7 e8 c8 76 7d 00 eb 91 48 8d 05 00 00 00 00 48 c7 c7
RSP: 0018:ffffc9000476fa50 EFLAGS: 00000246
RAX: 0000000100000000 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcab340 RDI: 0000000000000001
RBP: ffff88802bd5ee80 R08: ffffffff92faa637 R09: 1ffffffff25f54c6
R10: dffffc0000000000 R11: fffffbfff25f54c7 R12: ffff88801a3fc020
R13: 0000000000000036 R14: 1ffff1100347f804 R15: ffff88801a3fc000
 kfree_rcu_work+0x44b/0x500 kernel/rcu/tree.c:3481
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.
usb 5-1: RX USB error -71.