INFO: task kworker/0:9:5092 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9     state:D stack:26072 pid:5092  ppid:2      flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:181
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor322:6695 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:25824 pid:6695  ppid:4997   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 rfkill_fop_release+0x4d/0x230 net/rfkill/core.c:1312
 __fput+0x3b7/0x890 fs/file_table.c:321
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x68f/0x2290 kernel/exit.c:874
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff5faf9
RSP: 002b:00007ffec74cc0b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f6efffd3330 RCX: 00007f6efff5faf9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f6efffd3330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>
INFO: task syz-executor322:6696 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:25784 pid:6696  ppid:5003   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 rfkill_fop_release+0x4d/0x230 net/rfkill/core.c:1312
 __fput+0x3b7/0x890 fs/file_table.c:321
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x68f/0x2290 kernel/exit.c:874
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff5faf9
RSP: 002b:00007ffec74cc0b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f6efffd3330 RCX: 00007f6efff5faf9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f6efffd3330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>
INFO: task syz-executor322:6697 blocked for more than 144 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:26240 pid:6697  ppid:4996   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 rfkill_unregister+0xd0/0x230 net/rfkill/core.c:1130
 nfc_unregister_device+0x96/0x2a0 net/nfc/core.c:1167
 virtual_ncidev_close+0x59/0x90 drivers/nfc/virtual_ncidev.c:163
 __fput+0x3b7/0x890 fs/file_table.c:321
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x68f/0x2290 kernel/exit.c:874
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff5faf9
RSP: 002b:00007ffec74cc0b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f6efffd3330 RCX: 00007f6efff5faf9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f6efffd3330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>
INFO: task syz-executor322:6701 blocked for more than 144 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:24448 pid:6701  ppid:5000   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 rfkill_fop_open+0x134/0x680 net/rfkill/core.c:1163
 misc_open+0x308/0x380 drivers/char/misc.c:165
 chrdev_open+0x54e/0x630 fs/char_dev.c:414
 do_dentry_open+0x7f9/0x10f0 fs/open.c:920
 do_open fs/namei.c:3636 [inline]
 path_openat+0x27b3/0x3170 fs/namei.c:3791
 do_filp_open+0x234/0x490 fs/namei.c:3818
 do_sys_openat2+0x13f/0x500 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff60e69
RSP: 002b:00007ffec74cc108 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f6efff60e69
RDX: 0000000000060c01 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000f6bf
R13: 00007ffec74cc11c R14: 00007ffec74cc130 R15: 00007ffec74cc120
 </TASK>
INFO: task syz-executor322:6702 blocked for more than 144 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:25368 pid:6702  ppid:4994   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 device_lock include/linux/device.h:837 [inline]
 nfc_dev_down net/nfc/core.c:143 [inline]
 nfc_rfkill_set_block+0x50/0x300 net/nfc/core.c:179
 rfkill_set_block+0x1e7/0x430 net/rfkill/core.c:345
 rfkill_fop_write+0x5bb/0x790 net/rfkill/core.c:1286
 vfs_write+0x28d/0xb20 fs/read_write.c:582
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff60e69
RSP: 002b:00007ffec74cc108 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f6efff60e69
RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000f6ec
R13: 00007ffec74cc11c R14: 00007ffec74cc130 R15: 00007ffec74cc120
 </TASK>
INFO: task syz-executor322:6718 blocked for more than 144 seconds.
      Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor322 state:D stack:26872 pid:6718  ppid:4993   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 misc_open+0x5c/0x380 drivers/char/misc.c:129
 chrdev_open+0x54e/0x630 fs/char_dev.c:414
 do_dentry_open+0x7f9/0x10f0 fs/open.c:920
 do_open fs/namei.c:3636 [inline]
 path_openat+0x27b3/0x3170 fs/namei.c:3791
 do_filp_open+0x234/0x490 fs/namei.c:3818
 do_sys_openat2+0x13f/0x500 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6efff60e69
RSP: 002b:00007ffec74cc108 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f6efff60e69
RDX: 0000000000000002 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 0000000000000000 R08: 00007ffec74cbb80 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000f72f
R13: 00007ffec74cc11c R14: 00007ffec74cc130 R15: 00007ffec74cc120
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8cf276f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8cf27ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
 #0: ffffffff8cf27520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4745:
 #0: ffff888028d4c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
3 locks held by kworker/0:9/5092:
 #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
 #1: ffffc90003d2fd20 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
 #2: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:181
1 lock held by syz-executor322/6695:
 #0: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_release+0x4d/0x230 net/rfkill/core.c:1312
1 lock held by syz-executor322/6696:
 #0: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_release+0x4d/0x230 net/rfkill/core.c:1312
2 locks held by syz-executor322/6697:
 #0: ffff88802d54c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #0: ffff88802d54c100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x63/0x2a0 net/nfc/core.c:1165
 #1: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xd0/0x230 net/rfkill/core.c:1130
2 locks held by syz-executor322/6701:
 #0: ffffffff8d662768 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129
 #1: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x134/0x680 net/rfkill/core.c:1163
2 locks held by syz-executor322/6702:
 #0: ffffffff8e362de8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1a9/0x790 net/rfkill/core.c:1278
 #1: ffff88802d54c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
 #1: ffff88802d54c100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
 #1: ffff88802d54c100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x50/0x300 net/nfc/core.c:179
1 lock held by syz-executor322/6718:
 #0: ffffffff8d662768 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5c/0x380 drivers/char/misc.c:129

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xec2/0xf00 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2416 Comm: kworker/u4:6 Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsrl arch/x86/include/asm/msr.h:262 [inline]
RIP: 0010:native_x2apic_icr_write arch/x86/include/asm/apic.h:238 [inline]
RIP: 0010:__x2apic_send_IPI_dest arch/x86/kernel/apic/x2apic_phys.c:123 [inline]
RIP: 0010:x2apic_send_IPI+0x7b/0xd0 arch/x86/kernel/apic/x2apic_phys.c:48
Code: 48 c1 e8 03 42 0f b6 04 38 84 c0 75 26 0f b7 13 0f ae f0 0f ae e8 41 83 fe 02 b8 00 04 00 00 41 0f 45 c6 b9 30 08 00 00 0f 30 <66> 90 5b 41 5e 41 5f 5d c3 89 d9 80 e1 07 fe c1 38 c1 7c cf 48 89
RSP: 0018:ffffc9000ba97798 EFLAGS: 00000206
RAX: 00000000000000fb RBX: ffff8880b98219c0 RCX: 0000000000000830
RDX: 0000000000000000 RSI: 00000000000000fb RDI: 0000000000000000
RBP: ffffffff8ca438e0 R08: ffffffff81803b3d R09: fffffbfff1cab98e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 00000000000000fb R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055eb6dabc680 CR3: 000000000cd30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:109 [inline]
 send_call_function_single_ipi kernel/smp.c:112 [inline]
 smp_call_function_many_cond+0x11af/0x1f60 kernel/smp.c:810
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:996
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1770 [inline]
 text_poke_bp_batch+0x5fd/0x950 arch/x86/kernel/alternative.c:2032
 text_poke_flush arch/x86/kernel/alternative.c:2161 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2168
 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xce/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:836
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.091 msecs