INFO: task kworker/1:0:13441 blocked for more than 430 seconds. Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:0 pid:13441 tgid:13441 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events rfkill_sync_work Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 device_lock include/linux/device.h:922 [inline] nfc_dev_down+0x2c/0x234 net/nfc/core.c:143 nfc_rfkill_set_block+0x28/0xb8 net/nfc/core.c:179 rfkill_set_block+0x160/0x3c4 net/rfkill/core.c:346 rfkill_sync+0x104/0x1ac net/rfkill/core.c:379 rfkill_sync_work+0x30/0x48 net/rfkill/core.c:1056 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/1:4:18494 blocked for more than 430 seconds. Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:0 pid:18494 tgid:18494 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events rfkill_global_led_trigger_worker Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 rfkill_global_led_trigger_worker+0x2c/0x10c net/rfkill/core.c:182 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task syz.3.9038:29486 blocked for more than 430 seconds. Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.9038 state:D stack:0 pid:29486 tgid:29486 ppid:28061 task_flags:0x400040 flags:0x00000009 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 __flush_work+0x488/0x954 kernel/workqueue.c:4244 __cancel_work_sync+0xb0/0x108 kernel/workqueue.c:4364 cancel_work_sync+0x14/0x20 kernel/workqueue.c:4401 rfkill_unregister+0x70/0x240 net/rfkill/core.c:1139 nfc_unregister_device+0x68/0x298 net/nfc/core.c:1167 nci_unregister_device+0x1bc/0x294 net/nfc/nci/core.c:1323 virtual_ncidev_close+0x48/0xb0 drivers/nfc/virtual_ncidev.c:172 __fput+0x2c8/0x954 fs/file_table.c:465 ____fput+0x14/0x20 fs/file_table.c:493 task_work_run+0x128/0x210 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x1d0/0x258 arch/arm64/kernel/entry-common.c:151 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+0x100/0x180 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 2 locks held by pr/ttyAMA0/32: 1 lock held by khungtaskd/33: #0: ffff8000872bda60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6758 1 lock held by klogd/3116: 2 locks held by getty/3252: #0: ffff000012e440a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d54b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0xdb4 drivers/tty/n_tty.c:2222 2 locks held by sshd-session/3306: 2 locks held by syz-executor/3307: 2 locks held by kworker/u8:2/13311: 4 locks held by kworker/1:0/13441: #0: ffff00000dc28d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008eb27c80 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff800088a3a948 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_sync_work+0x28/0x48 net/rfkill/core.c:1055 #3: ffff000022cce100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline] #3: ffff000022cce100 (&dev->mutex){....}-{4:4}, at: nfc_dev_down+0x2c/0x234 net/nfc/core.c:143 3 locks held by kworker/u8:10/15411: 3 locks held by kworker/1:4/18494: #0: ffff00000dc28d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008dce7c80 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff800088a3a948 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_global_led_trigger_worker+0x2c/0x10c net/rfkill/core.c:182 1 lock held by kworker/u8:5/21419: 3 locks held by kworker/u8:7/28080: 1 lock held by syz.3.9038/29486: #0: ffff000022cce100 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline] #0: ffff000022cce100 (&dev->mutex){....}-{4:4}, at: nfc_unregister_device+0x48/0x298 net/nfc/core.c:1165 2 locks held by syz.4.9124/29780: #0: ffff800087aa4c68 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x64/0x35c drivers/char/misc.c:143 #1: ffff800088a3a948 (rfkill_global_mutex){+.+.}-{4:4}, at: rfkill_fop_open+0x11c/0x62c net/rfkill/core.c:1178 1 lock held by syz.5.9138/29827: #0: ffff800087aa4c68 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x64/0x35c drivers/char/misc.c:143 1 lock held by syz-executor/29831: #0: ffff800087aa4c68 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x64/0x35c drivers/char/misc.c:143 1 lock held by syz-executor/29841: #0: ffff800087aa4c68 (misc_mtx){+.+.}-{4:4}, at: misc_open+0x64/0x35c drivers/char/misc.c:143 =============================================