INFO: task kworker/0:0:9 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:24224 pid:9     tgid:9     ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x829/0x1340
 rfkill_global_led_trigger_worker+0x27/0xd0
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x5b0/0xb20
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task kworker/0:1:10 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:24128 pid:10    tgid:10    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events rfkill_sync_work
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x829/0x1340
 nfc_dev_down+0x3b/0x290
 nfc_rfkill_set_block+0x2d/0x100
 rfkill_set_block+0x1d2/0x440
 rfkill_sync_work+0x114/0x200
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x5b0/0xb20
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.1.868:9062 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.868       state:D stack:22136 pid:9062  tgid:9061  ppid:5840   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 schedule_timeout+0xc3/0x2c0
 wait_for_completion+0x2cc/0x5e0
 __flush_work+0xa17/0xc50
 __cancel_work_sync+0xbe/0x110
 rfkill_unregister+0x92/0x220
 nfc_unregister_device+0x96/0x2f0
 virtual_ncidev_close+0x56/0x90
 __fput+0x44f/0xa70
 fput_close_sync+0x11f/0x240
 __x64_sys_close+0x7e/0x110
 do_syscall_64+0xf0/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f41a8f9acb9
RSP: 002b:00007f41a9dc3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f41a9205fa0 RCX: 00007f41a8f9acb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
RBP: 00007f41a9008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f41a9206038 R14: 00007f41a9205fa0 R15: 00007ffc92d68408
 </TASK>
INFO: task syz.2.893:9189 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.893       state:D stack:26368 pid:9189  tgid:9188  ppid:5845   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x829/0x1340
 rfkill_fop_open+0x12d/0x820
 misc_open+0x2d5/0x350
 chrdev_open+0x4cd/0x5e0
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x3486/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xf0/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d89b9acb9
RSP: 002b:00007f4d8a998028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4d89e05fa0 RCX: 00007f4d89b9acb9
RDX: 0000000000000801 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f4d89c08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d89e06038 R14: 00007f4d89e05fa0 R15: 00007ffd6fe55248
 </TASK>
INFO: task syz.0.904:9229 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.904       state:D stack:28152 pid:9229  tgid:9228  ppid:5844   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x829/0x1340
 misc_open+0x51/0x350
 chrdev_open+0x4cd/0x5e0
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x3486/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xf0/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c8db9acb9
RSP: 002b:00007f8c8eac5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8c8de05fa0 RCX: 00007f8c8db9acb9
RDX: 00000000001a1001 RSI: 0000200000000240 RDI: ffffffffffffff9c
RBP: 00007f8c8dc08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c8de06038 R14: 00007f8c8de05fa0 R15: 00007ffde1d48de8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/9:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900000e7b80 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8fa00a08 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x27/0xd0
4 locks held by kworker/0:1/10:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900000f7b80 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8fa00a08 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_sync_work+0x2e/0x200
 #3: ffff88801b1c7100 (&dev->mutex){....}-{4:4}, at: nfc_dev_down+0x3b/0x290
1 lock held by khungtaskd/35:
 #0: ffffffff8e341aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5662:
 #0: ffff888112dde0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by syz.1.868/9062:
 #0: ffff88801b1c7100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x63/0x2f0
2 locks held by syz.2.893/9189:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
 #1: ffffffff8fa00a08 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_open+0x12d/0x820
1 lock held by syz.0.904/9229:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9237:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9239:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9241:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9244:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9246:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9248:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9257:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9259:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350
1 lock held by syz-executor/9261:
 #0: ffffffff8eba09c8 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x51/0x350

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 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+0x1a9/0x280
 nmi_cpu_backtrace+0x3a9/0x3e0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x5b0/0xb20
 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+0xf/0x20
Code: a7 4e 02 c3 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 83 c2 10 00 fb f4 <e9> bc f3 02 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 00000282
RAX: a55b59505aa18b00 RBX: ffffffff8198b69a RCX: a55b59505aa18b00
RDX: 0000000000000001 RSI: ffffffff8d9b451e RDI: ffffffff8be09160
RBP: ffffc90000197f10 R08: ffff88823c6336db R09: 1ffff110478c66db
R10: dffffc0000000000 R11: ffffed10478c66dc R12: 1ffff1102c09e000
R13: dffffc0000000000 R14: 0000000000000001 R15: 1ffff92000032fc8
FS:  0000000000000000(0000) GS:ffff8882a9a1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe66504f58 CR3: 000000000e13a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x13/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x1ea/0x4e0
 cpu_startup_entry+0x43/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
