INFO: task udevd:3914 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:3914 ppid:1 flags:0x0000000c Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c 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:837 [inline] uevent_show+0x16c/0x32c drivers/base/core.c:2669 dev_attr_show+0x60/0xcc drivers/base/core.c:2372 sysfs_kf_seq_show+0x2c8/0x434 fs/sysfs/file.c:59 kernfs_seq_show+0x150/0x1fc fs/kernfs/file.c:205 seq_read_iter+0x3ac/0xc00 fs/seq_file.c:230 kernfs_fop_read_iter+0x140/0x5a8 fs/kernfs/file.c:279 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x5ac/0x7c4 fs/read_write.c:470 ksys_read+0x120/0x210 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:621 __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 INFO: task syz.4.156:4779 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.156 state:D stack:0 pid:4779 ppid:4305 flags:0x0000000d Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c 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 hci_unregister_dev+0x314/0x4b4 net/bluetooth/hci_core.c:2724 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __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 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x544/0x19a8 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 get_signal+0x11d0/0x1310 kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x340/0x2b0c arch/arm64/kernel/signal.c:1134 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] asm_exit_to_user_mode+0x6c/0x80 arch/arm64/kernel/entry-common.c:149 ret_from_fork+0x1c/0x20 arch/arm64/kernel/entry.S:867 INFO: task kworker/0:11:4829 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:11 state:D stack:0 pid:4829 ppid:2 flags:0x00000008 Workqueue: events rfkill_sync_work Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c 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:837 [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_sync_work+0x84/0xf8 net/rfkill/core.c:1042 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:864 INFO: task kworker/0:15:5062 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:15 state:D stack:0 pid:5062 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+0xdd4/0x1b2c 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:864 INFO: task syz-executor:6587 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6587 ppid:1 flags:0x0000000c Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c 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 hci_unregister_dev+0x314/0x4b4 net/bluetooth/hci_core.c:2724 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __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 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x544/0x19a8 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1030 __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 INFO: task syz.0.716:7997 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.716 state:D stack:0 pid:7997 ppid:4300 flags:0x00000009 Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c kernel/sched/core.c:6561 schedule+0xc4/0x170 kernel/sched/core.c:6637 schedule_timeout+0xb4/0x2c8 kernel/time/timer.c:1941 do_wait_for_common+0x284/0x3e4 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x44/0x5c kernel/sched/completion.c:138 __flush_work+0x128/0x1bc kernel/workqueue.c:3076 __cancel_work_timer+0x2ec/0x448 kernel/workqueue.c:3163 cancel_work_sync+0x24/0x38 kernel/workqueue.c:3199 rfkill_unregister+0x8c/0x208 net/rfkill/core.c:1124 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+0x1f70/0x2b0c 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.3.766:8187 blocked for more than 143 seconds. Not tainted 6.1.137-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.766 state:D stack:0 pid:8187 ppid:4296 flags:0x0000000d Call trace: __switch_to+0x2f4/0x568 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xdd4/0x1b2c 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 hci_unregister_dev+0x314/0x4b4 net/bluetooth/hci_core.c:2724 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:573 __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 exit_task_work include/linux/task_work.h:39 [inline] do_exit+0x544/0x19a8 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1021 get_signal+0x11d0/0x1310 kernel/signal.c:2871 do_signal arch/arm64/kernel/signal.c:1081 [inline] do_notify_resume+0x340/0x2b0c arch/arm64/kernel/signal.c:1134 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 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000152476b0 (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: ffff800015247ed0 (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: ffff800015246d40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 4 locks held by udevd/3914: #0: ffff0000f32ddc30 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xa8/0xc00 fs/seq_file.c:182 #1: ffff0000f3b0c488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x370 fs/kernfs/file.c:154 #2: ffff0000c95a72c0 (kn->active#4){.+.+}-{0:0}, at: kernfs_seq_start+0x74/0x370 fs/kernfs/file.c:155 #3: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #3: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: uevent_show+0x16c/0x32c drivers/base/core.c:2669 2 locks held by getty/4056: #0: ffff0000d6386098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80002062b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 1 lock held by syz-executor/4301: #0: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 1 lock held by syz.4.156/4779: #0: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 4 locks held by kworker/0:11/4829: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800021417c20 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x34/0xf8 net/rfkill/core.c:1040 #3: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #3: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #3: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2a8 net/nfc/core.c:179 3 locks held by kworker/0:15/5062: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800021937c20 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 1 lock held by syz-executor/6587: #0: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 1 lock held by syz.0.716/7997: #0: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #0: ffff0000c3368100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x68/0x288 net/nfc/core.c:1165 1 lock held by syz.3.766/8187: #0: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 2 locks held by syz-executor/8327: #0: ffff0000c8b4d118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8359: #0: ffff0000d63c7918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8380: #0: ffff0000ca8dd918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8391: #0: ffff0000dcc21918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8412: #0: ffff0000f480e918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8421: #0: ffff0000cfa12918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8423: #0: ffff0000cb92c118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8425: #0: ffff0000f3123118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8427: #0: ffff0000d1a03918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8429: #0: ffff0000ca280918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8435: #0: ffff0000cfa13118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8437: #0: ffff0000c98b6918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8439: #0: ffff0000c3e31118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/8441: #0: ffff0000cacf4118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987208 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 =============================================