INFO: task kworker/1:4:6572 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:0 pid:6572 tgid:6572 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events rfkill_op_handler Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 device_lock include/linux/device.h:895 [inline] nfc_dev_down+0x3c/0x258 net/nfc/core.c:143 nfc_rfkill_set_block+0x38/0xfc net/nfc/core.c:179 rfkill_set_block+0x18c/0x374 net/rfkill/core.c:346 rfkill_epo+0x8c/0x158 net/rfkill/core.c:466 __rfkill_handle_global_op net/rfkill/input.c:60 [inline] rfkill_op_handler+0x164/0x25c net/rfkill/input.c:108 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 INFO: task kworker/1:10:6849 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:10 state:D stack:0 pid:6849 tgid:6849 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events rfkill_global_led_trigger_worker Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:182 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 INFO: task syz.3.47:6900 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.47 state:D stack:0 pid:6900 tgid:6900 ppid:6578 task_flags:0x400040 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1145 nfc_unregister_device+0x94/0x2d8 net/nfc/core.c:1167 nci_unregister_device+0x1dc/0x21c net/nfc/nci/core.c:1323 virtual_ncidev_close+0x5c/0xa0 drivers/nfc/virtual_ncidev.c:172 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008fa5b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by klogd/6202: 2 locks held by getty/6356: #0: ffff0000d542f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211 1 lock held by sshd-session/6559: 1 lock held by syz-executor/6571: #0: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1145 4 locks held by kworker/1:4/6572: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff80009e937be0 ((rfkill_op_work).work){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_epo+0x58/0x158 net/rfkill/core.c:462 #3: ffff0000d279d100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #3: ffff0000d279d100 (&dev->mutex){....}-{4:4}, at: nfc_dev_down+0x3c/0x258 net/nfc/core.c:143 1 lock held by syz-executor/6581: #0: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1145 3 locks held by kworker/1:10/6849: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff8000b2e07be0 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:182 2 locks held by syz.3.47/6900: #0: ffff0000d279d100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #0: ffff0000d279d100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x68/0x2d8 net/nfc/core.c:1165 #1: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1145 2 locks held by syz-executor/7755: #0: ffff0000d034a118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x3c/0x634 drivers/bluetooth/hci_vhci.c:478 #1: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x44/0x7ac net/rfkill/core.c:1071 2 locks held by kworker/u8:28/7840: #0: ffff0000c27e4148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff8000a33e7be0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 2 locks held by syz.4.345/8413: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 #1: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_open+0x110/0x744 net/rfkill/core.c:1178 1 lock held by syz.1.349/8435: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8441: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8446: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8451: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8452: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8461: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8462: 1 lock held by syz-executor/8463: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8465: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8471: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/8472: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 2 locks held by syz-executor/8473: 1 lock held by syz-executor/8474: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 =============================================