INFO: task kworker/1:18:4467 blocked for more than 143 seconds. Not tainted 5.15.115-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:18 state:D stack: 0 pid: 4467 ppid: 2 flags:0x00000008 Workqueue: events rfkill_global_led_trigger_worker Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6514 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 process_one_work+0x790/0x11b8 kernel/workqueue.c:2307 worker_thread+0x910/0x1034 kernel/workqueue.c:2454 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 INFO: task syz-executor.2:5557 blocked for more than 143 seconds. Not tainted 5.15.115-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack: 0 pid: 5557 ppid: 4014 flags:0x0000000c Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6514 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1118 nfc_unregister_device+0x98/0x290 net/nfc/core.c:1167 nci_unregister_device+0x1e0/0x22c net/nfc/nci/core.c:1306 virtual_ncidev_close+0x70/0xb0 drivers/nfc/virtual_ncidev.c:166 __fput+0x30c/0x7f0 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x688/0x2134 kernel/exit.c:872 do_group_exit+0x110/0x268 kernel/exit.c:994 get_signal+0x634/0x1550 kernel/signal.c:2889 do_signal arch/arm64/kernel/signal.c:890 [inline] do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014aa19a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268 2 locks held by getty/3720: #0: ffff0000d31e6098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001a27b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147 1 lock held by syz-executor.2/4014: #0: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1118 3 locks held by kworker/1:18/4467: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2280 #1: ffff800020ac7c00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2282 #2: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 2 locks held by syz-executor.2/5557: #0: ffff0000cd646190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #0: ffff0000cd646190 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x6c/0x290 net/nfc/core.c:1165 #1: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1118 2 locks held by syz-executor.4/5542: #0: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x250/0x750 net/rfkill/core.c:1266 #1: ffff0000cd646190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #1: ffff0000cd646190 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #1: ffff0000cd646190 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x50/0x2d0 net/nfc/core.c:179 2 locks held by syz-executor.2/5702: #0: ffff00011ed4ad18 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x44/0x568 drivers/bluetooth/hci_vhci.c:149 #1: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7a4 net/rfkill/core.c:1045 2 locks held by syz-executor.4/5704: #0: ffff00011ed61518 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x44/0x568 drivers/bluetooth/hci_vhci.c:149 #1: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7a4 net/rfkill/core.c:1045 2 locks held by syz-executor.2/5706: #0: ffff00011f5ff118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x44/0x568 drivers/bluetooth/hci_vhci.c:149 #1: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7a4 net/rfkill/core.c:1045 2 locks held by syz-executor.4/5709: #0: ffff00011ef1d118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x44/0x568 drivers/bluetooth/hci_vhci.c:149 #1: ffff800016c39968 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7a4 net/rfkill/core.c:1045 =============================================