INFO: task kworker/0:8:4376 blocked for more than 143 seconds. Not tainted 6.1.141-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:8 state:D stack:0 pid:4376 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 kworker/0:9:6688 blocked for more than 143 seconds. Not tainted 6.1.141-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:9 state:D stack:0 pid:6688 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 rfkill_sync_work+0x34/0xf8 net/rfkill/core.c:1040 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.1.572:7400 blocked for more than 143 seconds. Not tainted 6.1.141-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.572 state:D stack:0 pid:7400 ppid:6668 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_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 get_signal+0x1120/0x1310 kernel/signal.c:2648 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: ffff800015247670 (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: ffff800015247e90 (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: ffff800015246d00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 1 lock held by dhcpcd/3967: 2 locks held by getty/4060: #0: ffff0000d6963098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001ce702f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf9c drivers/tty/n_tty.c:2198 3 locks held by kworker/0:8/4376: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020ce7c20 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:181 3 locks held by kworker/0:9/6688: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b4/0x13a8 kernel/workqueue.c:2265 #1: ffff800020937c20 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x6f8/0x13a8 kernel/workqueue.c:2267 #2: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x34/0xf8 net/rfkill/core.c:1040 2 locks held by syz.4.571/7397: #0: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x21c/0x5a4 net/rfkill/core.c:1278 #1: ffff0000f901c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #1: ffff0000f901c100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #1: ffff0000f901c100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2a8 net/nfc/core.c:179 1 lock held by syz.1.572/7400: #0: ffff0000f901c100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #0: ffff0000f901c100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x68/0x288 net/nfc/core.c:1165 2 locks held by syz-executor/7875: #0: ffff0000c3c3d918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/7881: #0: ffff0000cb77d918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/9130: #0: ffff0000f4576918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/9131: #0: ffff0000d0ef3118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 1 lock held by syz.0.933/9210: #0: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x208 net/rfkill/core.c:1130 2 locks held by syz-executor/9265: #0: ffff0000d55f7118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/10451: #0: ffff0000c2f8b118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz-executor/10452: #0: ffff0000c2f8b918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x3c/0x6cc drivers/bluetooth/hci_vhci.c:378 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz.5.1091/10627: #0: ffff0000cd1f5098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800017987808 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x77c net/rfkill/core.c:1057 2 locks held by syz.5.1091/10631: #0: ffff0000cd1f51c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_lock+0x7c/0xd0 drivers/tty/tty_mutex.c:18 #1: ffff0000cd1f5098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_write+0x3c/0x4c drivers/tty/tty_ldsem.c:366 1 lock held by dhcpcd/10713: #0: ffff00010e82a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1756 [inline] #0: ffff00010e82a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x48/0xb2c net/packet/af_packet.c:3249 =============================================