INFO: task kworker/u8:12:3499 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:12 state:D stack:0 pid:3499 tgid:3499 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:742 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 class_wiphy_constructor include/net/cfg80211.h:6363 [inline] reg_leave_invalid_chans net/wireless/reg.c:2441 [inline] reg_check_chans_work+0x114/0xdf0 net/wireless/reg.c:2456 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Showing all locks held in the system: 1 lock held by kthreadd/2: 1 lock held by pool_workqueue_/3: #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline] #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x290/0x628 kernel/rcu/tree_exp.h:956 3 locks held by kworker/u8:1/13: 2 locks held by kworker/1:0/24: 1 lock held by khungtaskd/32: #0: ffff80008fa5b6e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 5 locks held by pr/ttyAMA-1/43: 3 locks held by kworker/1:2/44: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff800099387be0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:4/462: 7 locks held by kworker/u8:6/803: 3 locks held by kworker/u8:8/1564: #0: ffff0000d547a148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff80009ff57be0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:9/3133: 3 locks held by kworker/u8:10/3251: 3 locks held by kworker/u8:11/3479: 4 locks held by kworker/u8:12/3499: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231 #1: ffff8000a2ed7be0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d0/0x1558 kernel/workqueue.c:3231 #2: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d80c8788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6363 [inline] #3: ffff0000d80c8788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2441 [inline] #3: ffff0000d80c8788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x114/0xdf0 net/wireless/reg.c:2456 3 locks held by kworker/u8:13/4045: 3 locks held by kworker/u8:14/4339: 3 locks held by kworker/u8:15/4694: 3 locks held by kworker/u8:18/5338: 3 locks held by kworker/u8:19/5603: 1 lock held by klogd/6199: 1 lock held by udevd/6210: 3 locks held by dhcpcd/6265: 2 locks held by getty/6353: #0: ffff0000d58820a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/6558: 4 locks held by udevd/6560: 1 lock held by udevd/6563: #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4539 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x858/0x3114 fs/namei.c:4784 1 lock held by udevd/6564: 1 lock held by syz-executor/6570: #0: ffff0000d4f16308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_target+0x84/0x24c net/netfilter/x_tables.c:254 1 lock held by syz-executor/6571: #0: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz-executor/6572: #0: ffff0000d4f16308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_table_lock+0x64/0x3c8 net/netfilter/x_tables.c:1243 2 locks held by syz-executor/6580: 2 locks held by syz-executor/6582: #0: ffff0000c94d0ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:499 [inline] #0: ffff0000c94d0ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x1fc/0x52c net/bluetooth/hci_core.c:2715 #1: ffff0000c94d00c0 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x4c4/0xfd0 net/bluetooth/hci_sync.c:5314 4 locks held by kworker/0:4/6680: 1 lock held by udevd/6730: 2 locks held by udevd/6882: #0: ffff0000dc040420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:499 #1: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4537 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x868/0x3114 fs/namei.c:4784 2 locks held by udevd/6885: #0: ffff0000dc040420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:499 #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3712 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_renaming+0x140/0x3c4 fs/namei.c:3808 2 locks held by udevd/6887: #0: ffff0000dc040420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:499 #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3712 [inline] #1: ffff0000dc035068 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_renaming+0x140/0x3c4 fs/namei.c:3808 3 locks held by udevd/6906: 1 lock held by udevd/6915: #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4539 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x858/0x3114 fs/namei.c:4784 1 lock held by udevd/6916: #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4539 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x858/0x3114 fs/namei.c:4784 1 lock held by udevd/6918: #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1042 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: open_last_lookups fs/namei.c:4539 [inline] #0: ffff0000dc035068 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: path_openat+0x858/0x3114 fs/namei.c:4784 3 locks held by kworker/u8:21/6922: 3 locks held by kworker/u8:22/6925: 2 locks held by syz-executor/6926: #0: ffff0000db6fc420 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:499 #1: ffff0000f59520c0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:1032 [inline] #1: ffff0000f59520c0 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: chmod_common+0x134/0x36c fs/open.c:639 2 locks held by dhcpcd/6934: #0: ffff0000f42db5c8 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #0: ffff0000f42db5c8 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: __sock_release net/socket.c:661 [inline] #0: ffff0000f42db5c8 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: sock_close+0x7c/0x1e4 net/socket.c:1455 #1: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #1: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x33c/0x628 kernel/rcu/tree_exp.h:956 2 locks held by kworker/1:14/6936: 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