INFO: task kworker/0:6:6667 blocked for more than 153 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:6 state:D stack:0 pid:6667 tgid:6667 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 INFO: task kworker/u8:12:7566 blocked for more than 157 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:7566 tgid:7566 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_power_efficient crda_timeout_work 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 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 crda_timeout_work+0x1c/0x68 net/wireless/reg.c:541 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: 1 lock held by pool_workqueue_/3: #0: ffff80008f771078 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffff80008f771078 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x33c/0x628 kernel/rcu/tree_exp.h:957 2 locks held by kworker/0:0/9: 4 locks held by kworker/0:1/11: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 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: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 2 locks held by kswapd0/75: 3 locks held by kworker/u8:4/258: 5 locks held by kworker/u8:5/2036: 3 locks held by kworker/R-ipv6_/4232: #0: ffff0000d2c45148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff80009ed47bc0 ((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 1 lock held by kworker/R-bat_e/4308: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 3 locks held by kworker/u8:6/4536: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff80009c977be0 ((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/u8:7/4649: 3 locks held by kworker/u8:8/4752: 3 locks held by kworker/u8:9/4851: 1 lock held by jbd2/nvme0n1p2-/6157: 1 lock held by kworker/R-ext4-/6158: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 4 locks held by kworker/0:2/6159: 1 lock held by klogd/6182: 1 lock held by dhcpcd/6248: #0: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by crond/6322: 2 locks held by getty/6336: #0: ffff0000c19cf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000993ef2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 4 locks held by kworker/0:3/6543: 2 locks held by syz-executor/6552: 2 locks held by syz-executor/6557: 1 lock held by syz-executor/6562: #0: ffff0000d12fa0e0 (&type->s_umount_key#58){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d12fa0e0 (&type->s_umount_key#58){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d12fa0e0 (&type->s_umount_key#58){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 1 lock held by kworker/R-wg-cr/6582: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 1 lock held by kworker/R-wg-cr/6584: 1 lock held by kworker/R-wg-cr/6593: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 1 lock held by kworker/R-wg-cr/6594: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 1 lock held by kworker/R-wg-cr/6595: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 2 locks held by kworker/0:4/6608: 3 locks held by kworker/0:5/6663: 4 locks held by kworker/0:6/6667: #0: ffff0000c0029948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff8000a4677be0 (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: ffff0000c6a98788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6358 [inline] #3: ffff0000c6a98788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc8/0x1dc net/wireless/reg.c:3179 2 locks held by kworker/0:7/6684: 1 lock held by syz-executor/6872: #0: ffff800092858e28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by udevd/6918: 1 lock held by kworker/R-wg-cr/6921: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 1 lock held by kworker/R-wg-cr/6928: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 3 locks held by kworker/u8:10/6958: 3 locks held by syz-executor/7286: 1 lock held by kworker/R-wg-cr/7302: #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f612368 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3556 2 locks held by kworker/u8:11/7565: 3 locks held by kworker/u8:12/7566: #0: ffff0000c0032148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3237 #1: ffff80009c077be0 ((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 2 locks held by kworker/u8:13/7569: 5 locks held by kworker/u8:14/8273: 3 locks held by kworker/u8:15/8274: 2 locks held by syz-executor/8276: 1 lock held by kworker/0:8/8278: =============================================