INFO: task kworker/1:3:3848 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3     state:D stack:0     pid:3848  tgid:3848  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
[<ffffffff8641aae4>] context_switch kernel/sched/core.c:5357 [inline]
[<ffffffff8641aae4>] __schedule+0x1042/0x4106 kernel/sched/core.c:6961
[<ffffffff8641dc6c>] __schedule_loop kernel/sched/core.c:7043 [inline]
[<ffffffff8641dc6c>] schedule+0xc4/0x35e kernel/sched/core.c:7058
[<ffffffff8641e5f0>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:7115
[<ffffffff8642620e>] __mutex_lock_common kernel/locking/mutex.c:676 [inline]
[<ffffffff8642620e>] __mutex_lock+0xb76/0x19d8 kernel/locking/mutex.c:760
[<ffffffff86427084>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:812
[<ffffffff861176ea>] rfkill_global_led_trigger_worker+0x2c/0x17a net/rfkill/core.c:182
[<ffffffff801c8adc>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3236
[<ffffffff801cbbec>] process_scheduled_works kernel/workqueue.c:3319 [inline]
[<ffffffff801cbbec>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3400
[<ffffffff801e94d0>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff8006a9c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff86439bde>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328
INFO: task kworker/1:0:4956 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:0     pid:4956  tgid:4956  ppid:2      task_flags:0x4208060 flags:0x00000000
Workqueue: events rfkill_sync_work
Call Trace:
[<ffffffff8641aae4>] context_switch kernel/sched/core.c:5357 [inline]
[<ffffffff8641aae4>] __schedule+0x1042/0x4106 kernel/sched/core.c:6961
[<ffffffff8641dc6c>] __schedule_loop kernel/sched/core.c:7043 [inline]
[<ffffffff8641dc6c>] schedule+0xc4/0x35e kernel/sched/core.c:7058
[<ffffffff8641e5f0>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:7115
[<ffffffff8642620e>] __mutex_lock_common kernel/locking/mutex.c:676 [inline]
[<ffffffff8642620e>] __mutex_lock+0xb76/0x19d8 kernel/locking/mutex.c:760
[<ffffffff86427084>] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:812
[<ffffffff861f22b8>] device_lock include/linux/device.h:911 [inline]
[<ffffffff861f22b8>] nfc_dev_down+0x3a/0x29a net/nfc/core.c:143
[<ffffffff861f255c>] nfc_rfkill_set_block+0x44/0xf0 net/nfc/core.c:179
[<ffffffff86119ee0>] rfkill_set_block+0x1cc/0x500 net/rfkill/core.c:346
[<ffffffff8611b708>] rfkill_sync+0x12a/0x1ce net/rfkill/core.c:379
[<ffffffff8611b932>] rfkill_sync_work+0x32/0x48 net/rfkill/core.c:1056
[<ffffffff801c8adc>] process_one_work+0x96a/0x1f32 kernel/workqueue.c:3236
[<ffffffff801cbbec>] process_scheduled_works kernel/workqueue.c:3319 [inline]
[<ffffffff801cbbec>] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3400
[<ffffffff801e94d0>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff8006a9c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff86439bde>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328
INFO: task syz.1.466:5243 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.466       state:D stack:0     pid:5243  tgid:5243  ppid:3209   task_flags:0x400040 flags:0x00000008
Call Trace:
[<ffffffff8641aae4>] context_switch kernel/sched/core.c:5357 [inline]
[<ffffffff8641aae4>] __schedule+0x1042/0x4106 kernel/sched/core.c:6961
[<ffffffff8641dc6c>] __schedule_loop kernel/sched/core.c:7043 [inline]
[<ffffffff8641dc6c>] schedule+0xc4/0x35e kernel/sched/core.c:7058
[<ffffffff864337da>] schedule_timeout+0x1c6/0x2ae kernel/time/sleep_timeout.c:75
[<ffffffff8641f822>] do_wait_for_common kernel/sched/completion.c:100 [inline]
[<ffffffff8641f822>] __wait_for_common+0x1d2/0x3e8 kernel/sched/completion.c:121
[<ffffffff8641fa52>] wait_for_common kernel/sched/completion.c:132 [inline]
[<ffffffff8641fa52>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:153
[<ffffffff801cf6ba>] __flush_work+0x644/0xd4e kernel/workqueue.c:4244
[<ffffffff801d130a>] __cancel_work_sync+0x136/0x15a kernel/workqueue.c:4364
[<ffffffff801d134a>] cancel_work_sync+0x1c/0x26 kernel/workqueue.c:4401
[<ffffffff86119350>] rfkill_unregister+0x98/0x2a0 net/rfkill/core.c:1139
[<ffffffff861f06c0>] nfc_unregister_device+0x9e/0x322 net/nfc/core.c:1167
[<ffffffff862172e8>] nci_unregister_device+0x1e8/0x29a net/nfc/nci/core.c:1323
[<ffffffff82d241a8>] virtual_ncidev_close+0x4e/0xae drivers/nfc/virtual_ncidev.c:172
[<ffffffff80c2fc2c>] __fput+0x382/0xa8c fs/file_table.c:468
[<ffffffff80c303e4>] ____fput+0x1c/0x26 fs/file_table.c:496
[<ffffffff801e3400>] task_work_run+0x16a/0x25e kernel/task_work.c:227
[<ffffffff803c2dea>] resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
[<ffffffff803c2dea>] exit_to_user_mode_loop+0x118/0x134 kernel/entry/common.c:43
[<ffffffff864101f4>] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
[<ffffffff864101f4>] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
[<ffffffff864101f4>] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
[<ffffffff864101f4>] do_trap_ecall_u+0x3f0/0x530 arch/riscv/kernel/traps.c:357
[<ffffffff86439abe>] handle_exception+0x146/0x152 arch/riscv/kernel/entry.S:198

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff885dd6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a0 kernel/locking/lockdep.c:6771
1 lock held by syslogd/3015:
1 lock held by klogd/3019:
2 locks held by getty/3171:
 #0: ffffaf801d77f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0x12b6 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/3196:
3 locks held by kworker/1:3/3848:
 #0: ffffaf8011e80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3211
 #1: ffff8f8007497b70 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3211
 #2: ffffffff89cdb068 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x2c/0x17a net/rfkill/core.c:182
3 locks held by kworker/0:4/3936:
4 locks held by kworker/1:0/4956:
 #0: ffffaf8011e80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3211
 #1: ffff8f8005957b70 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3211
 #2: ffffffff89cdb068 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_sync_work+0x2a/0x48 net/rfkill/core.c:1055
 #3: ffffaf801b6e7100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:911 [inline]
 #3: ffffaf801b6e7100 (&dev->mutex){....}-{4:4}, at: nfc_dev_down+0x3a/0x29a net/nfc/core.c:143
1 lock held by syz.1.466/5243:
 #0: ffffaf801b6e7100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:911 [inline]
 #0: ffffaf801b6e7100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x6e/0x322 net/nfc/core.c:1165
2 locks held by kworker/u10:6/6038:
 #0: ffffaf8011e89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1f32 kernel/workqueue.c:3211
 #1: ffff8f8006bb7b70 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1f32 kernel/workqueue.c:3211
4 locks held by syz.2.615/6088:
1 lock held by modprobe/6091:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007a45c>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132
[<ffffffff8000329a>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138
[<ffffffff8006163e>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8006163e>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff800616d2>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff863d1c96>] nmi_cpu_backtrace+0x3b0/0x3b2 lib/nmi_backtrace.c:113
[<ffffffff863d1f4e>] nmi_trigger_cpumask_backtrace+0x2b6/0x458 lib/nmi_backtrace.c:62
[<ffffffff80088254>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:350
[<ffffffff80500b50>] trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
[<ffffffff80500b50>] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
[<ffffffff80500b50>] watchdog+0xc56/0x1134 kernel/hung_task.c:491
[<ffffffff801e94d0>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff8006a9c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff86439bde>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16 Comm: rcu_preempt Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : __mod_timer+0x7ec/0xbd8 kernel/time/timer.c:1141
 ra : __mod_timer+0x7ec/0xbd8 kernel/time/timer.c:1139
epc : ffffffff803f0798 ra : ffffffff803f0798 sp : ffff8f8000117840
 gp : ffffffff89e9a500 tp : ffffaf8012eecec0 t0 : 0000000000000001
 t1 : fffff5ef0dda1008 t2 : 0000000000000008 s0 : ffff8f80001179b0
 s1 : ffff8f8000117a00 a0 : ffffaf8012eecec8 a1 : ffffffff87f8c750
 a2 : 0000000000000002 a3 : 0000000000000001 a4 : 1ffff5f0025dd9d8
 a5 : 0000000000000000 a6 : 0000000000000003 a7 : ffffaf806ed08043
 s2 : ffff8f8000117940 s3 : 000000010002c44c s4 : ffffaf806ed08040
 s5 : 000000010002c44d s6 : 1ffff1f000022f14 s7 : ffffffff884141c0
 s8 : ffffffffffffffff s9 : 0000000000000000 s10: ffffaf806ed08040
 s11: 1ffff1f000022f44 t3 : 5fd15b4a00000000 t4 : fffff5ef0dda1008
 t5 : fffff5ef0dda1009 t6 : 0000000000000002
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff803f0798>] __mod_timer+0x7ec/0xbd8 kernel/time/timer.c:1139
[<ffffffff803f0c68>] add_timer+0x5a/0x9c kernel/time/timer.c:1249
[<ffffffff8643374e>] schedule_timeout+0x13a/0x2ae kernel/time/sleep_timeout.c:98
[<ffffffff8038bd26>] rcu_gp_fqs_loop+0x776/0xa80 kernel/rcu/tree.c:2083
[<ffffffff8038ee30>] rcu_gp_kthread+0x22c/0x2a2 kernel/rcu/tree.c:2285
[<ffffffff801e94d0>] kthread+0x39c/0x7d4 kernel/kthread.c:463
[<ffffffff8006a9c4>] ret_from_fork_kernel+0x2a/0xbb4 arch/riscv/kernel/process.c:214
[<ffffffff86439bde>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328