INFO: task kworker/1:0:24 blocked for more than 155 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:0 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events reg_todo Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1c04/0x2db8 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7283 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x4fc/0xed0 kernel/locking/mutex.c:820 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873 class_wiphy_constructor include/net/cfg80211.h:6646 [inline] reg_process_self_managed_hints+0x94/0x1c0 net/wireless/reg.c:3192 reg_todo+0x60c/0x6a4 net/wireless/reg.c:3205 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3397 worker_thread+0x798/0xbd0 kernel/workqueue.c:3478 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 Showing all locks held in the system: 1 lock held by kthreadd/2: 2 locks held by kworker/0:1/11: 3 locks held by kworker/u8:0/12: 1 lock held by kworker/R-mm_pe/13: 3 locks held by kworker/u8:1/15: 4 locks held by kworker/1:0/24: #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff80008ec17c40 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80008ec17c40 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff000102650780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6646 [inline] #3: ffff000102650780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0x94/0x1c0 net/wireless/reg.c:3192 2 locks held by kworker/1:1/26: 1 lock held by khungtaskd/31: #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 6 locks held by kworker/u8:2/39: 3 locks held by kworker/u8:3/40: 3 locks held by kworker/u8:4/561: #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff8000939c7c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000939c7c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/1:2/1037: 3 locks held by kworker/R-ipv6_/2817: #0: ffff0000ca1fa140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000ca1fa140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800096657c60 ( (work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] (work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/R-bat_e/2852: 3 locks held by kworker/u8:5/3295: 2 locks held by kworker/u8:6/3738: 4 locks held by kworker/u8:7/3825: 2 locks held by kworker/1:3/4305: 4 locks held by udevd/4341: 1 lock held by dhcpcd/4396: #0: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/4487: #0: ffff0000d423b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000923ab2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf70 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/4706: 4 locks held by kworker/u9:1/4708: #0: ffff0000f46ae940 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000f46ae940 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800098957c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800098957c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff0000f1b58ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000f1b580b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5764 1 lock held by syz-executor/4711: 3 locks held by syz-executor/4717: 1 lock held by kworker/R-wg-cr/4773: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4777: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4779: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4780: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4787: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4788: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline] #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa58/0xd90 kernel/workqueue.c:3649