INFO: task kworker/0:3:2383 blocked for more than 154 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:20200 pid:2383  tgid:2383  ppid:2      task_flags:0x4288060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 pvr2_hdw_disconnect+0x6d/0x500
 pvr2_context_disconnect+0x42/0x210
 pvr_disconnect+0x78/0xe0
 usb_unbind_interface+0x26e/0x910
 device_release_driver_internal+0x4d9/0x870
 bus_remove_device+0x455/0x570
 device_del+0x527/0x8f0
 usb_disable_device+0x3d4/0x8d0
 usb_disconnect+0x32f/0x990
 hub_event+0x1cc9/0x4f30
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
7 locks held by kworker/0:0/9:
7 locks held by kworker/u8:0/12:
3 locks held by kworker/1:0/24:
 #0: ffff888100069d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900001e7c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdd3180 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0xab/0x1090
10 locks held by kworker/u10:0/27:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
5 locks held by kworker/u11:0/55:
3 locks held by kworker/u10:2/64:
3 locks held by kworker/u10:3/83:
3 locks held by kworker/u10:4/88:
2 locks held by kworker/1:3/994:
2 locks held by kworker/u9:3/1110:
 #0: ffff8881000ac940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900075d7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
6 locks held by kworker/0:3/2383:
 #0: ffff8881052a5d40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc9000ba67c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff88816df841d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x17f/0x4f30
 #3: ffff88801c4de1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xf8/0x990
 #4: ffff8880200391a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x870
 #5: ffff888021148180 (&hdw->big_lock_mutex){+.+.}-{4:4}, at: pvr2_hdw_disconnect+0x6d/0x500
1 lock held by pvrusb2-context/2422:
 #0: ffff888021148180 (&hdw->big_lock_mutex){+.+.}-{4:4}, at: pvr2_hdw_initialize+0xe4/0x3c50
2 locks held by syslogd/5045:
2 locks held by udevd/5063:
1 lock held by dhcpcd/5358:
2 locks held by getty/5441:
 #0: ffff8881118b40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by kworker/u8:2/5508:
1 lock held by syz-executor/5539:
2 locks held by syz-executor/5620:
3 locks held by kworker/0:5/5685:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc9000496fc40 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff900e0160 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x27/0xd0
3 locks held by kworker/0:6/5694:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900049ffc40 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdd3180 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
3 locks held by kworker/1:5/5726:
4 locks held by udevd/5850:
 #0: ffff88811230d1b8 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb7/0xe10
 #1: ffff88816eadcc80 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5c/0x420
 #2: ffff88816fc97f08 (kn->active#23){.+.+}-{0:0}, at: kernfs_seq_start+0xb2/0x420
 #3: ffff88801c4de1d8 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0
2 locks held by udevd/6192:
3 locks held by kworker/u8:5/7194:
2 locks held by kworker/u8:6/7195:
3 locks held by kworker/u8:7/7196:
 #0: ffff8881742a5140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900046bfc40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdd3180 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
1 lock held by syz.3.846/8992:
6 locks held by syz.3.1404/11207:
1 lock held by syz.3.1404/11211:
3 locks held by syz.3.1404/11220:
3 locks held by modprobe/11223:
3 locks held by kworker/u10:6/11224:
3 locks held by kworker/u10:7/11225:
2 locks held by kworker/u8:10/11227:
2 locks held by syz-executor/11230:
2 locks held by kworker/1:6/11232:
3 locks held by kworker/u10:8/11233:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27 Comm: kworker/u10:0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:mark_lock+0x3c/0x190
Code: 00 03 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08 0f 45 da bd 01 00 00 00 89 d9 d3 e5 25 ff 1f 00 00 48 0f a3 05 f4 8f 9f 12 <73> 10 48 69 c0 c8 00 00 00 48 8d 88 b0 93 e2 93 eb 42 83 3d bb 1f
RSP: 0018:ffffc900000072d0 EFLAGS: 00000047
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000004
RDX: 0000000000000004 RSI: ffff888160a9c7f8 RDI: ffff888160a9bb00
RBP: 0000000000000010 R08: ffffffff84bdb9c5 R09: ffffffff9a70a278
R10: dffffc0000000000 R11: fffffbfff2061e1f R12: 0000000000000003
R13: ffff888160a9c7f8 R14: ffff888160a9bb00 R15: 0000000000000009
FS:  0000000000000000(0000) GS:ffff88818dc84000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d7d271dc3 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __lock_acquire+0x689/0x2cf0
 lock_acquire+0x106/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 debug_check_no_obj_freed+0x145/0x550
 kmem_cache_free+0xfd/0x650
 vxcan_xmit+0x1f7/0x780
 dev_hard_start_xmit+0x2cd/0x830
 __dev_queue_xmit+0x14d9/0x3950
 can_send+0x921/0xd20
 can_can_gw_rcv+0xcb0/0xf70
 can_rcv_filter+0x126/0x7a0
 can_receive+0x2c6/0x440
 can_rcv+0x1f9/0x330
 process_backlog+0xc66/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 nsim_dev_trap_report_work+0x7d6/0xb90
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
