INFO: task kworker/0:4:6229 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:0 pid:6229 tgid:6229 ppid:2 flags:0x00000008 Workqueue: events rfkill_op_handler Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 device_lock include/linux/device.h:990 [inline] nfc_dev_down net/nfc/core.c:143 [inline] nfc_rfkill_set_block+0x50/0x2d0 net/nfc/core.c:179 rfkill_set_block+0x18c/0x37c 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+0x170/0x288 net/rfkill/input.c:108 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 INFO: task kworker/0:5:6230 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack:0 pid:6230 tgid:6230 ppid:2 flags:0x00000008 Workqueue: events rfkill_global_led_trigger_worker Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:182 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 INFO: task syz-executor.3:6796 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:6796 tgid:6796 ppid:6186 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1149 hci_unregister_dev+0x304/0x4a8 net/bluetooth/hci_core.c:2757 vhci_release+0x7c/0xd0 drivers/bluetooth/hci_vhci.c:674 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x618/0x1f64 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.4:9468 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:9468 tgid:9468 ppid:6193 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1149 nfc_unregister_device+0x98/0x290 net/nfc/core.c:1167 nci_unregister_device+0x1dc/0x21c net/nfc/nci/core.c:1312 virtual_ncidev_close+0x5c/0xa0 drivers/nfc/virtual_ncidev.c:168 __fput+0x30c/0x738 fs/file_table.c:376 __fput_sync+0x60/0x9c fs/file_table.c:461 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1539 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.1:9598 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:9598 tgid:9596 ppid:6190 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 rfkill_register+0x44/0x7d4 net/rfkill/core.c:1075 nfc_register_device+0x148/0x310 net/nfc/core.c:1132 nci_register_device+0x6ac/0x7c4 net/nfc/nci/core.c:1266 virtual_ncidev_open+0x13c/0x1bc drivers/nfc/virtual_ncidev.c:153 misc_open+0x2f0/0x368 drivers/char/misc.c:165 chrdev_open+0x3c8/0x4dc fs/char_dev.c:414 do_dentry_open+0x778/0x12b4 fs/open.c:953 vfs_open+0x7c/0x90 fs/open.c:1087 do_open fs/namei.c:3645 [inline] path_openat+0x1f6c/0x2830 fs/namei.c:3802 do_filp_open+0x1bc/0x3cc fs/namei.c:3829 do_sys_openat2+0x124/0x1b8 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1430 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.3:9605 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:0 pid:9605 tgid:9605 ppid:1 flags:0x00000004 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 rfkill_register+0x44/0x7d4 net/rfkill/core.c:1075 hci_register_dev+0x3e0/0x954 net/bluetooth/hci_core.c:2659 __vhci_create_device drivers/bluetooth/hci_vhci.c:438 [inline] vhci_create_device+0x358/0x700 drivers/bluetooth/hci_vhci.c:480 vhci_get_user drivers/bluetooth/hci_vhci.c:537 [inline] vhci_write+0x318/0x3b8 drivers/bluetooth/hci_vhci.c:617 call_write_iter include/linux/fs.h:2087 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x968/0xc3c fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee74ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 1 lock held by klogd/5773: #0: ffff0001b4013f58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:559 2 locks held by getty/5934: #0: ffff0000d296e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094f722f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 4 locks held by kworker/0:4/6229: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff800098017c20 ((rfkill_op_work).work){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 #2: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_epo+0x58/0x158 net/rfkill/core.c:462 #3: ffff0000d6c05100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #3: ffff0000d6c05100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline] #3: ffff0000d6c05100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x50/0x2d0 net/nfc/core.c:179 3 locks held by kworker/0:5/6230: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff800098027c20 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 #2: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x30/0xe4 net/rfkill/core.c:182 1 lock held by syz-executor.3/6796: #0: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1149 2 locks held by syz-executor.4/9468: #0: ffff0000d6c05100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff0000d6c05100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x6c/0x290 net/nfc/core.c:1165 #1: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xb8/0x210 net/rfkill/core.c:1149 3 locks held by syz-executor.1/9598: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 #1: ffff0000cb25a100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #1: ffff0000cb25a100 (&dev->mutex){....}-{3:3}, at: nfc_register_device+0xb4/0x310 net/nfc/core.c:1128 #2: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7d4 net/rfkill/core.c:1075 2 locks held by syz-executor.3/9605: #0: ffff0000d4283918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x44/0x700 drivers/bluetooth/hci_vhci.c:479 #1: ffff800091c0e588 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x44/0x7d4 net/rfkill/core.c:1075 1 lock held by syz-executor.2/9690: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.0/9701: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.4/9704: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.1/9706: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.2/9708: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.0/9710: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.3/9712: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.4/9714: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.1/9716: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.2/9722: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.0/9724: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 1 lock held by syz-executor.3/9726: #0: ffff800090537008 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x6c/0x368 drivers/char/misc.c:129 =============================================