INFO: task kworker/1:0:31935 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:0     D27136 31935      2 0x80000000
Workqueue: usb_hub_wq hub_event
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:697
 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:692
 usb_start_wait_urb+0x252/0x4c0 drivers/usb/core/message.c:63
 usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
 usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
 hub_port_init+0x12dc/0x3120 drivers/usb/core/hub.c:4704
 hub_port_connect drivers/usb/core/hub.c:5070 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5253 [inline]
 port_event drivers/usb/core/hub.c:5361 [inline]
 hub_event+0x1ccd/0x44a0 drivers/usb/core/hub.c:5441
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Showing all locks held in the system:
3 locks held by kworker/1:1/33:
 #0: 000000007eb100a6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000a8f1ccae ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000006c3f408d (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline]
 #2: 000000006c3f408d (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455
1 lock held by khungtaskd/1564:
 #0: 00000000af046bb3 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7810:
 #0: 000000001f952aee (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
3 locks held by kworker/0:4/9350:
 #0: 000000007eb100a6 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 000000005fe9fb9a ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000005f04f458 (rtnl_mutex){+.+.}, at: addrconf_dad_work+0x9c/0x10a0 net/ipv6/addrconf.c:3989
5 locks held by kworker/1:0/31935:
 #0: 000000005076b368 ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 000000006cdcb0e1 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 00000000f79a68a1 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline]
 #2: 00000000f79a68a1 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387
 #3: 000000008b86a0c2 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline]
 #3: 000000008b86a0c2 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline]
 #3: 000000008b86a0c2 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline]
 #3: 000000008b86a0c2 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline]
 #3: 000000008b86a0c2 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441
 #4: 00000000dbfdb041 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578
2 locks held by syz-executor.3/3440:
 #0: 000000005f04f458 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 000000005f04f458 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779
 #1: 000000000a9cf3f7 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
 #1: 000000000a9cf3f7 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667
1 lock held by syz-executor.3/3457:
 #0: 000000005f04f458 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline]
 #0: 000000005f04f458 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779

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

NMI backtrace for cpu 1
CPU: 1 PID: 1564 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 37 Comm: kworker/u4:2 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline]
RIP: 0010:rcu_is_watching+0x38/0xc0 kernel/rcu/tree.c:1025
Code: 2e 94 25 02 48 c7 c3 c0 2a 02 00 48 ba 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 00 af cf 89 48 89 f9 48 c1 e9 03 80 3c 11 00 <75> 6d 48 03 1c c5 00 af cf 89 be 04 00 00 00 48 8d 6b 10 48 89 ef
RSP: 0018:ffff8880b5137c90 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000022ac0 RCX: 1ffffffff139f5e0
RDX: dffffc0000000000 RSI: ffffffff83771e31 RDI: ffffffff89cfaf00
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 000000000000012c R15: ffff8880a45d8000
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f46b524c000 CR3: 00000000a126c000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_read_unlock include/linux/rcupdate.h:677 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline]
 batadv_nc_worker+0x936/0xd50 net/batman-adv/network-coding.c:730
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415