INFO: task kworker/0:2:1518 blocked for more than 148 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D stack:0     pid:1518  tgid:1518  ppid:2      task_flags:0x4208060 flags:0x00000010
Workqueue: events reg_todo
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7326
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7383
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x4ec/0xf14 kernel/locking/mutex.c:821
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874
 class_wiphy_constructor include/net/cfg80211.h:6884 [inline]
 reg_process_self_managed_hints+0x90/0x1ac net/wireless/reg.c:3195
 reg_todo+0x60c/0x6a4 net/wireless/reg.c:3208
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 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/0:0/9:
3 locks held by kworker/0:1/11:
3 locks held by kworker/u8:0/12:
1 lock held by kworker/R-mm_pe/13:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
3 locks held by kworker/u8:1/15:
 #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff80008ec47c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff80008ec47c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff800089d93380 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
3 locks held by kworker/1:0/24:
3 locks held by kworker/1:1/26:
1 lock held by khungtaskd/31:
 #0: ffff800088cb6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffff800088cb6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
 #0: ffff800088cb6f20 (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:
4 locks held by kworker/u8:3/40:
 #0: ffff0000c1efa940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000c1efa940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff80008eff7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff80008eff7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff0000cf45c0d8 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x24/0xdc fs/super.c:566
 #3: ffff0000cf45ac18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
 #3: ffff0000cf45ac18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1876 [inline]
 #3: ffff0000cf45ac18 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x170/0x2dc fs/ext4/inode.c:3042
3 locks held by kworker/u8:4/180:
2 locks held by kworker/1:2/867:
 #0: ffff0000c002b540 (
(wq_completion)events
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff800094027c40 (free_ipc_work){+.+.}-{0:0}, at: process_schedule
 #1: ffff800094027c40 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff800094027c40 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
3 locks held by kworker/u8:5/1120:
3 locks held by kworker/u8:6/1471:
4 locks held by kworker/0:2/1518:
 #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff8000964b7c40 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff8000964b7c40 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff800089d93380 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
 #3: ffff0000f3f607a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6884 [inline]
 #3: ffff0000f3f607a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0x90/0x1ac net/wireless/reg.c:3195
3 locks held by kworker/R-ipv6_/2819:
 #0: ffff0000cdd33140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000cdd33140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff8000992b7c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff8000992b7c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff800089d93380 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
2 locks held by kworker/R-bat_e/2851:
3 locks held by kworker/u8:7/3287:
1 lock held by kworker/R-ext4-/4308:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
3 locks held by dhcpcd/4398:
1 lock held by crond/4473:
2 locks held by kworker/0:3/4474:
2 locks held by getty/4491:
 #0: ffff0000d199a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009248b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/4714:
1 lock held by syz-executor/4718:
1 lock held by kworker/R-wg-cr/4768:
1 lock held by kworker/R-wg-cr/4770:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by kworker/R-wg-cr/4782:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by kworker/R-wg-cr/4786:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by kworker/R-wg-cr/4787:
1 lock held by kworker/R-wg-cr/4789:
1 lock held by kworker/R-wg-cr/4792:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by kworker/R-wg-cr/4793:
1 lock held by kworker/R-wg-cr/4794:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
2 locks held by kworker/1:5/4809:
2 locks held by kworker/1:6/4816:
2 locks held by kworker/0:5/4831:
2 locks held by kworker/1:7/4834:
3 locks held by kworker/u8:8/4936:
1 lock held by kworker/R-bond1/5314:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by udevd/5325:
 #0: ffff0000c7fd2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 block/bdev.c:948
1 lock held by kworker/R-bond1/5406:
 #0: ffff800088b5ce40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737
1 lock held by udevd/5816:
3 locks held by kworker/u8:9/5856:
2 locks held by syz.1.376/5914:
2 locks held by syz.3.379/5923:
2 locks held by kworker/0:6/5927:
2 locks held by kworker/u8:10/5928:
3 locks held by kworker/u8:11/5929:
3 locks held by kworker/u8:12/5930:
 #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff80009c347c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff80009c347c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff800089d93380 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
4 locks held by kworker/u8:13/5931:
4 locks held by kworker/u8:14/5932:
2 locks held by syz-executor/5933:
2 locks held by kworker/u8:15/5934:

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