INFO: task kworker/u8:22:25554 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:22   state:D stack:0     pid:25554 tgid:25554 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 pool_workqueue_/3:
 #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
 #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x33c/0x628 kernel/rcu/tree_exp.h:956
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/32:
 #0: ffff80008fa5b6e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
3 locks held by kworker/u8:2/41:
3 locks held by kworker/u8:3/42:
2 locks held by pr/ttyAMA-1/43:
2 locks held by kworker/u8:6/463:
3 locks held by kworker/u8:7/703:
3 locks held by kworker/u8:8/790:
3 locks held by kworker/u8:10/2122:
 #0: ffff0000d5434148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231
 #1: ffff8000a1ab7be0 ((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/u8:11/2185:
2 locks held by kworker/u8:12/2441:
3 locks held by kworker/u8:13/3045:
3 locks held by kworker/u8:17/4835:
3 locks held by kworker/u8:18/5454:
3 locks held by kworker/u8:19/5881:
4 locks held by kworker/u8:20/5978:
3 locks held by kworker/u8:21/6108:
3 locks held by udevd/6211:
3 locks held by dhcpcd/6266:
2 locks held by crond/6341:
2 locks held by getty/6352:
 #0: ffff0000d58f30a0 (&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/6555:
2 locks held by kworker/0:3/6618:
1 lock held by syz-executor/19700:
 #0: ffff0000d4f3a308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_target+0x84/0x24c net/netfilter/x_tables.c:254
1 lock held by syz-executor/20955:
 #0: ffff0000d4f3a308 (&xt[i].mutex){+.+.}-{4:4}, at: xt_find_table_lock+0x64/0x3c8 net/netfilter/x_tables.c:1243
1 lock held by syz.1.7424/23334:
 #0: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
2 locks held by syz-executor/24748:
1 lock held by syz.3.8395/25528:
 #0: ffff800092ae4928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
4 locks held by kworker/u8:22/25554:
 #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x1558 kernel/workqueue.c:3231
 #1: ffff80009f5a7be0 ((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: ffff0000df970788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6363 [inline]
 #3: ffff0000df970788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2441 [inline]
 #3: ffff0000df970788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x114/0xdf0 net/wireless/reg.c:2456
1 lock held by syz-executor/25562:
3 locks held by kworker/u8:26/25563:
3 locks held by kworker/u8:28/25567:

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