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:0 pid:9 tgid:9 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.3.95:7170 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.95 state:D stack:0 pid:7170 tgid:7170 ppid:6581 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 INFO: task syz.3.95:7185 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.95 state:D stack:0 pid:7185 tgid:7170 ppid:6581 task_flags:0x400040 flags:0x00000019 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 get_signal+0x112c/0x12f8 kernel/signal.c:2807 arch_do_signal_or_restart+0x268/0x46d4 arch/arm64/kernel/signal.c:1619 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x88/0x18c 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 INFO: task syz.2.121:7364 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.121 state:D stack:0 pid:7364 tgid:7362 ppid:6580 task_flags:0x400140 flags:0x00000001 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] llcp_sock_connect+0x1c0/0x8ac net/nfc/llcp_sock.c:695 __sys_connect_file net/socket.c:2089 [inline] __sys_connect+0x2a0/0x3ac net/socket.c:2108 __do_sys_connect net/socket.c:2114 [inline] __se_sys_connect net/socket.c:2111 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2111 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 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: 3 locks held by kworker/0:0/9: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff800097cc7be0 ((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 1 lock held by khungtaskd/32: #0: ffff80008fa5b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA-1/43: 3 locks held by kworker/u8:19/3462: 1 lock held by klogd/6203: 2 locks held by getty/6356: #0: ffff0000dc2480a0 (&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 4 locks held by kworker/0:4/6583: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff8000a2437be0 ((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: ffff0000cd1f6100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #3: ffff0000cd1f6100 (&dev->mutex){....}-{4:4}, at: nfc_dev_down+0x3c/0x258 net/nfc/core.c:143 1 lock held by udevd/6586: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 2 locks held by syz.3.95/7170: #0: ffff0000cd1f6100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #0: ffff0000cd1f6100 (&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.3.95/7185: #0: ffff0000e1ae1100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #0: ffff0000e1ae1100 (&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.2.121/7364: #0: ffff0000c9c80260 (sk_lock-AF_NFC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1700 [inline] #0: ffff0000c9c80260 (sk_lock-AF_NFC){+.+.}-{0:0}, at: llcp_sock_connect+0x128/0x8ac net/nfc/llcp_sock.c:672 #1: ffff0000cd1f6100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #1: ffff0000cd1f6100 (&dev->mutex){....}-{4:4}, at: llcp_sock_connect+0x1c0/0x8ac net/nfc/llcp_sock.c:695 2 locks held by syz-executor/7586: #0: ffff0000d3c7b918 (&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 3 locks held by syz.0.172/7617: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 #1: ffff0000e0c4d100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline] #1: ffff0000e0c4d100 (&dev->mutex){....}-{4:4}, at: nfc_register_device+0xac/0x354 net/nfc/core.c:1128 #2: ffff800092dc6688 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_register+0x44/0x7ac net/rfkill/core.c:1071 2 locks held by syz-executor/7624: #0: ffff0000da95f918 (&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 1 lock held by syz.4.180/7648: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz.1.182/7667: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7674: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7676: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7678: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7680: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7682: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7687: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7689: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7691: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7694: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 1 lock held by syz-executor/7696: #0: ffff8000914f3808 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x68/0x33c drivers/char/misc.c:125 =============================================