INFO: task kworker/0:0:9 blocked for more than 149 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sy "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:9 tgid:9 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+0x1bec/0x2dcc kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x140/0x218 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+0x4e4/0xef8 kernel/locking/mutex.c:820 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873 class_wiphy_constructor include/net/cfg80211.h:6645 [inline] reg_process_self_managed_hints+0x94/0x1c0 net/wireless/reg.c:3192 reg_todo+0x604/0x69c net/wireless/reg.c:3205 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 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 pool_workqueue_/3: #0: ffff800088b6c8e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffff800088b6c8e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x34c/0x67c kernel/rcu/tree_exp.h:961 4 locks held by kworker/0:0/9: #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+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80008ea87c40 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80008ea87c40 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000f20c0780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6645 [inline] #3: ffff0000f20c0780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0x94/0x1c0 net/wireless/reg.c:3192 4 locks held by kworker/1:1/26: 1 lock held by khungtaskd/31: #0: ffff800088b672e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088b672e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088b672e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 3 locks held by kworker/u8:2/39: 3 locks held by kworker/u8:3/40: 5 locks held by pr/ttyAMA-1/41: 5 locks held by kworker/u9:0/50: #0: ffff0000d1708940 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000d1708940 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff8000900a7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000900a7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff0000d8670ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x17c/0x37c net/bluetooth/hci_sync.c:331 #3: ffff0000d86700b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d4/0x938 net/bluetooth/hci_sync.c:5759 #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2136 [inline] #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1411 3 locks held by kworker/u8:5/1213: 2 locks held by kworker/1:3/1503: 2 locks held by kworker/u8:6/3042: 3 locks held by kworker/u8:7/3113: 3 locks held by kworker/u8:8/3299: 3 locks held by kworker/u8:9/3469: 3 locks held by kworker/u8:10/3531: 3 locks held by kworker/u8:11/3639: 1 lock held by udevd/4344: 1 lock held by dhcpcd/4399: #0: ffff800089c3d140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/4492: #0: ffff0000d444b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009232e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/4698: 3 locks held by udevd/4702: 1 lock held by udevd/4703: 5 locks held by kworker/u9:3/4719: #0: ffff0000caf1c940 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000caf1c940 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff8000957c7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000957c7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff0000c7b80ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x17c/0x37c net/bluetooth/hci_sync.c:331 #3: ffff0000c7b800b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d4/0x938 net/bluetooth/hci_sync.c:5759 #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2136 [inline] #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1411 6 locks held by kworker/u9:4/4721: #0: ffff0000f0b53140 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000f0b53140 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff8000957a7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000957a7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff0000c5cfcea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x17c/0x37c net/bluetooth/hci_sync.c:331 #3: ffff0000c5cfc0b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d4/0x938 net/bluetooth/hci_sync.c:5759 #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2136 [inline] #4: ffff800089d9d060 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1411 #5: ffff0000f0b55af8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x88/0x440 net/bluetooth/l2cap_core.c:1779 4 locks held by kworker/1:4/4808: 2 locks held by kworker/0:6/4821: 3 locks held by kworker/u8:12/6298: 3 locks held by kworker/u8:14/6301: 3 locks held by kworker/u8:16/6303: 3 locks held by kworker/u8:18/6305: 3 locks held by kworker/u8:19/6306: 3 locks held by kworker/u8:20/6307: #0: ffff0000cf037940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000cf037940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800096397c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800096397c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:22/6309: 3 locks held by kworker/u8:23/6310: #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+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800096387c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800096387c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 6 locks held by kworker/u8:24/6311: 3 locks held by kworker/u8:25/6312: 3 locks held by kworker/u8:26/6313: 2 locks held by kworker/u8:28/6315: 3 locks held by kworker/u8:29/6316: 3 locks held by kworker/u8:30/6317: 3 locks held by kworker/u8:31/6318: 3 locks held by kworker/u8:32/6319: 3 locks held by kworker/u8:34/6321: #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+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff800092907c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800092907c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff800089c3d140 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by syz-executor/6384: 2 locks held by udevd/6452: #0: ffff0000d4982410 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:493 #1: ffff0000cdcaf480 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #1: ffff0000cdcaf480 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4608 [inline] #1: ffff0000cdcaf480 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x858/0x2a6c fs/namei.c:4855 1 lock held by udevd/6457: #0: ffff0000c8756350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0x8cc block/bdev.c:953 3 locks held by syz-executor/6921: 1 lock held by syz.1.421/7239: =============================================