INFO: task kworker/0:4:5879 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:24624 pid:5879  tgid:5879  ppid:2      task_flags:0x4208060 flags:0x00004000
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+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.0.463:7895 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.463       state:D stack:25096 pid:7895  tgid:7895  ppid:5855   task_flags:0x400040 flags:0x00004004
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+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f700bd8ec29
RSP: 002b:00007ffcba2f09b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f700bfd7da0 RCX: 00007f700bd8ec29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f700bfd7da0 R08: 00000000000163ec R09: 00000014ba2f0caf
R10: 00007f700bfd7cb0 R11: 0000000000000246 R12: 000000000001bae3
R13: 00007ffcba2f0ab0 R14: ffffffffffffffff R15: 00007ffcba2f0ad0
 </TASK>
INFO: task syz.2.465:7910 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.465       state:D stack:24664 pid:7910  tgid:7909  ppid:5857   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 nfc_rfkill_set_block+0x50/0x2e0
 rfkill_set_block+0x1d2/0x440
 rfkill_fop_write+0x44b/0x570
 vfs_write+0x27e/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34e398ec29
RSP: 002b:00007f34e47b5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f34e3bd5fa0 RCX: 00007f34e398ec29
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f34e3a11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34e3bd6038 R14: 00007f34e3bd5fa0 R15: 00007ffee01c16d8
 </TASK>
INFO: task syz.1.466:7930 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.466       state:D stack:23984 pid:7930  tgid:7929  ppid:5849   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 rfkill_register+0x37/0x8e0
 wiphy_register+0x2231/0x2aa0
 ieee80211_register_hw+0x3442/0x40a0
 mac80211_hwsim_new_radio+0x2f0e/0x5340
 hwsim_new_radio_nl+0xea4/0x1b10
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6538b8ec29
RSP: 002b:00007f6539a05038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6538dd5fa0 RCX: 00007f6538b8ec29
RDX: 0000000000000084 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f6538c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6538dd6038 R14: 00007f6538dd5fa0 R15: 00007fff47cecca8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5669:
 #0: ffff8881081970a0 (&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/0:4/5879:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900041dfbc0 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x27/0xd0
2 locks held by syz.0.463/7895:
 #0: ffff88810b08f100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x63/0x2a0
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xc8/0x220
2 locks held by syz.2.465/7910:
 #0: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_write+0x191/0x570
 #1: ffff88810b08f100 (&dev->mutex){....}-{4:4}, at: nfc_rfkill_set_block+0x50/0x2e0
3 locks held by syz.1.466/7930:
 #0: ffffffff8f59fb50 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8f59f968 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0x10d/0x790
 #2: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7968:
 #0: ffff88811b667118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7972:
 #0: ffff88810ac56118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7973:
 #0: ffff88810ae67918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7975:
 #0: ffff888110051118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7979:
 #0: ffff88811adbd918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7980:
 #0: ffff88802803d918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7985:
 #0: ffff888111596118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7989:
 #0: ffff88803a96d918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0
2 locks held by syz-executor/7990:
 #0: ffff88803a0e6918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x34/0x650
 #1: ffffffff8f812fc8 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x37/0x8e0

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

NMI backtrace for cpu 1
CPU: 1 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+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 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: 0 Comm: swapper/0 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: 53 e8 02 00 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 b3 29 0d 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d80 EFLAGS: 00000282
RAX: ab1b029decd3d000 RBX: ffffffff819683f8 RCX: ab1b029decd3d000
RDX: 0000000000000001 RSI: ffffffff8d9ba1da RDI: ffffffff8be33f00
RBP: ffffffff8de07eb8 R08: ffff88804b032f9b R09: 1ffff110096065f3
R10: dffffc0000000000 R11: ffffed10096065f4 R12: ffffffff8fa38f30
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a20
FS:  0000000000000000(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624f66e1c48 CR3: 000000000df36000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 rest_init+0x2de/0x300
 start_kernel+0x3a9/0x410
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x147
 </TASK>
