INFO: task kworker/0:2:112 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:0 pid:112 ppid:2 flags:0x00000008 Workqueue: events rfkill_global_led_trigger_worker Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6696 __mutex_lock_common+0xad4/0x1f38 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 INFO: task syz.0.1773:8826 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1773 state:D stack:0 pid:8826 ppid:4325 flags:0x00000009 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6696 __mutex_lock_common+0xad4/0x1f38 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 nfc_unregister_device+0x94/0x288 net/nfc/core.c:1167 nci_unregister_device+0x1dc/0x21c net/nfc/nci/core.c:1311 virtual_ncidev_close+0x70/0xb0 drivers/nfc/virtual_ncidev.c:170 __fput+0x1bc/0x7c0 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x1ec/0x270 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2038/0x2b28 arch/arm64/kernel/signal.c:1137 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 INFO: task syz.4.1790:8868 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.1790 state:D stack:0 pid:8868 ppid:4326 flags:0x00000009 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xddc/0x1b18 kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6696 __mutex_lock_common+0xad4/0x1f38 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 device_lock include/linux/device.h:840 [inline] nfc_dev_down net/nfc/core.c:143 [inline] nfc_rfkill_set_block+0x4c/0x2a8 net/nfc/core.c:179 rfkill_set_block+0x18c/0x374 net/rfkill/core.c:345 rfkill_fop_write+0x488/0x5a4 net/rfkill/core.c:1286 vfs_write+0x29c/0x7c4 fs/read_write.c:582 ksys_write+0x120/0x210 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015297870 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff800015298090 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff800015296f00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 3 locks held by kworker/0:2/112: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020497c20 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 2 locks held by getty/4078: #0: ffff0000d69af098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001cea32f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 3 locks held by kworker/u4:5/4368: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020b77c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by syz.0.1773/8826: #0: ffff0000dc4be100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:840 [inline] #0: ffff0000dc4be100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x68/0x288 net/nfc/core.c:1165 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 2 locks held by syz.4.1790/8868: #0: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x21c/0x5a4 net/rfkill/core.c:1278 #1: ffff0000dc4be100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:840 [inline] #1: ffff0000dc4be100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #1: ffff0000dc4be100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2a8 net/nfc/core.c:179 2 locks held by syz-executor/9361: #0: ffff0000dc573118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/9364: #0: ffff0000dbced918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/10676: #0: ffff0000dbfa0918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/10692: #0: ffff0000d2d32118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/11618: #0: ffff0000dde5b118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/11635: #0: ffff0000c3574118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff8000179dfa28 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 1 lock held by syz.1.2773/11679: #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.3.2774/11682: #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.2.2776/11686: #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6ec/0xce4 net/core/rtnetlink.c:6150 1 lock held by syz.2.2776/11687: #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6ec/0xce4 net/core/rtnetlink.c:6150 1 lock held by syz.2.2776/11688: #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff800017731108 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6ec/0xce4 net/core/rtnetlink.c:6150 =============================================