INFO: task kworker/u8:28:7013 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:28   state:D stack:0     pid:7013  tgid:7013  ppid:2      task_flags:0x4208060 flags:0x00000010
Workqueue: events_power_efficient reg_check_chans_work
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
 context_switch kernel/sched/core.c:5387 [inline]
 __schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
 __schedule_loop kernel/sched/core.c:7267 [inline]
 schedule+0xa4/0x140 kernel/sched/core.c:7282
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
 __mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
 __mutex_lock kernel/locking/mutex.c:820 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
 class_wiphy_constructor include/net/cfg80211.h:6645 [inline]
 reg_leave_invalid_chans net/wireless/reg.c:2454 [inline]
 reg_check_chans_work+0x14c/0x112c net/wireless/reg.c:2469
 process_one_work+0x78c/0x173c kernel/workqueue.c:3302
 process_scheduled_works+0xdc/0x13c kernel/workqueue.c:3385
 worker_thread+0x770/0xbd0 kernel/workqueue.c:3466
 kthread+0x2f0/0x3c0 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842

Showing all locks held in the system:
3 locks held by kworker/1:1/26:
 #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
 #1: ffff80008eaf7be0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
 #2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
1 lock held by khungtaskd/31:
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3869
4 locks held by kworker/0:4/1471:
3 locks held by kworker/u8:7/3541:
1 lock held by klogd/4291:
3 locks held by udevd/4302:
2 locks held by dhcpcd/4356:
3 locks held by dhcpcd/4357:
1 lock held by crond/4433:
2 locks held by getty/4450:
 #0: ffff0000d47b20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009228b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6497:
3 locks held by kworker/u8:13/6998:
3 locks held by kworker/u8:14/6999:
2 locks held by kworker/u8:18/7003:
3 locks held by kworker/u8:19/7004:
2 locks held by kworker/u8:21/7006:
3 locks held by kworker/u8:22/7007:
3 locks held by kworker/u8:25/7010:
 #0: ffff0000cf82f140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
 #1: ffff8000935e7be0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
 #2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
3 locks held by kworker/u8:26/7011:
3 locks held by kworker/u8:27/7012:
4 locks held by kworker/u8:28/7013:
 #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}
, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
 #1: ffff800098d07be0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
 #2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80