INFO: task kworker/0:8:7578 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:8     state:D stack:23376 pid:7578  tgid:7578  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 rfkill_global_led_trigger_worker+0x27/0xd0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.7.7156:5492 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.7156      state:D stack:27048 pid:5492  tgid:5492  ppid:4568   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 rfkill_unregister+0xc8/0x220
 nfc_unregister_device+0x96/0x2a0
 virtual_ncidev_close+0x56/0x90
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1236d8eba9
RSP: 002b:00007ffca651ec98 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000000dc860 RCX: 00007f1236d8eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f1236fd7da0 R08: 0000000000000001 R09: 0000001da651ef8f
R10: 0000001b30420000 R11: 0000000000000246 R12: 00007f1236fd5fac
R13: 00007f1236fd5fa0 R14: ffffffffffffffff R15: 00007ffca651edb0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e33d360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5677:
 #0: ffff8880213530a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by kworker/0:8/7578:
 #0: ffff88801a875948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006b77ba0 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x27/0xd0
1 lock held by syz-executor/3351:
 #0: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xc8/0x220
2 locks held by syz.7.7156/5492:
 #0: ffff888038338100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x63/0x2a0
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xc8/0x220
2 locks held by syz.2.7157/5506:
 #0: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_write+0x191/0x570
 #1: ffff888038338100 (&dev->mutex){....}-{4:4}, at: nfc_rfkill_set_block+0x50/0x2e0
2 locks held by syz-executor/5595:
 #0: ffff8880231f2918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5598:
 #0: ffff88802901b118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5599:
 #0: ffff8880287e1918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5601:
 #0: ffff888027d4a918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5605:
 #0: ffff8880381ff918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5607:
 #0: ffff8880381f8918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5614:
 #0: ffff88803ca7b918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5618:
 #0: ffff88803a527118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/5620:
 #0: ffff88803a521118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8fa20168 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pv_native_safe_halt+0x13/0x20
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 33 0a 24 00 f3 0f 1e fa fb f4 <e9> c8 e6 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000177de0 EFLAGS: 00000286
RAX: ec6d7f76ebe51c00 RBX: ffffffff8196a397 RCX: ec6d7f76ebe51c00
RDX: 0000000000000001 RSI: ffffffff8dbc41f4 RDI: ffffffff8c03aae0
RBP: ffffc90000177f10 R08: ffff888136632fdb R09: 1ffff11026cc65fb
R10: dffffc0000000000 R11: ffffed1026cc65fc R12: ffffffff8fc45d30
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110200d5000
FS:  0000000000000000(0000) GS:ffff8881a39dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c23c87e20 CR3: 000000000e138000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x13/0x20
 default_idle_call+0x73/0xb0
 do_idle+0x1e7/0x510
 cpu_startup_entry+0x44/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
