INFO: task kworker/1:0:24 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:0 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events reg_todo Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5325 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7026 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7083 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676 __mutex_lock kernel/locking/mutex.c:760 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812 class_wiphy_constructor include/net/cfg80211.h:6358 [inline] reg_process_self_managed_hints+0xc8/0x1dc net/wireless/reg.c:3179 reg_todo+0x834/0x968 net/wireless/reg.c:3192 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 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: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/15: 4 locks held by kworker/1:0/24: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff800097b27be0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d4890788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6358 [inline] #3: ffff0000d4890788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc8/0x1dc net/wireless/reg.c:3179 2 locks held by kworker/1:1/26: 1 lock held by khungtaskd/32: #0: ffff80008f76b5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by kworker/R-write/34: 3 locks held by kworker/u8:2/41: 4 locks held by kworker/u8:3/42: 3 locks held by kworker/u8:4/226: 3 locks held by kworker/u8:5/780: 2 locks held by kworker/1:2/1736: 3 locks held by kworker/u8:6/2015: 3 locks held by kworker/R-ipv6_/4233: #0: ffff0000d3430948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000a1f77bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/R-bat_e/4309: 3 locks held by kworker/u8:7/4578: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000a0da7be0 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:8/4778: 3 locks held by kworker/u8:9/4867: 1 lock held by klogd/6181: 2 locks held by udevd/6192: 2 locks held by getty/6335: #0: ffff0000d384b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bb2b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by syz-executor/6552: 2 locks held by syz-executor/6553: 2 locks held by kworker/0:2/6554: 2 locks held by kworker/0:3/6557: 2 locks held by kworker/1:3/6591: 4 locks held by kworker/1:5/6624: 3 locks held by kworker/1:6/6625: 2 locks held by kworker/1:7/6662: 4 locks held by syz-executor/6905: 2 locks held by kworker/R-wg-cr/6940: 1 lock held by syz-executor/7254: #0: ffff0000caca60e0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000caca60e0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000caca60e0 (&type->s_umount_key#56){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 3 locks held by kworker/u8:10/7643: 3 locks held by kworker/u8:11/7645: 3 locks held by kworker/u8:12/7647: 3 locks held by kworker/u8:13/7651: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000a3c87be0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3237 #2: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/u8:14/7659: 3 locks held by kworker/u8:15/7661: 3 locks held by dhcpcd-run-hook/8061: 1 lock held by syz.0.268/8069: 2 locks held by kworker/u8:16/8090: 4 locks held by kworker/u8:17/8092: 2 locks held by syz-executor/8094: 2 locks held by kworker/0:7/8095: =============================================