INFO: task kworker/0:0:9 blocked for more than 146 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00000410 W Workqueue: events reg_todo Call trace: __switch_to+0x2b4/0x6e4 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:838 INFO: task kworker/R-ipv6_:2819 blocked for more than 146 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/R-ipv6_ state:D stack:0 pid:2819 tgid:2819 ppid:2 task_flags:0x4208060 flags:0x00000410 Workqueue: ipv6_addrconf addrconf_verify_work Call trace: __switch_to+0x2b4/0x6e4 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 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 rtnl_net_lock include/linux/rtnetlink.h:130 [inline] addrconf_verify_work+0x20/0x3c net/ipv6/addrconf.c:4769 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3629 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 INFO: task kworker/u8:8:3806 blocked for more than 146 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:8 state:D stack:0 pid:3806 tgid:3806 ppid:2 task_flags:0x4208060 flags:0x00000410 Workqueue: events_power_efficient crda_timeout_work Call trace: __switch_to+0x2b4/0x6e4 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 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 crda_timeout_work+0x20/0x90 net/wireless/reg.c:529 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:838 Showing all locks held in the system: 1 lock held by kthreadd/2: 1 lock held by pool_workqueue_/3: #0: ffff800088d2c7a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffff800088d2c7a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x340/0x66c kernel/rcu/tree_exp.h:961 4 locks held by kworker/0:0/9: #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: ffff80008ec67c40 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec67c40 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e147c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d96807a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6884 [inline] #3: ffff0000d96807a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0x90/0x1ac net/wireless/reg.c:3195 2 locks held by kworker/0:1/10: 2 locks held by kworker/0:0H/11: #0: ffff0000c1f12140 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c1f12140 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ec87c40 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec87c40 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 5 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by kworker/R-mm_pe/14: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 2 locks held by kworker/1:0/24: 4 locks held by kworker/1:1/26: 1 lock held by khungtaskd/31: #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088d271a0 (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: 3 locks held by kworker/u8:3/40: 2 locks held by pr/ttyAMA-1/41: 2 locks held by kworker/0:2/866: 3 locks held by kworker/u8:4/1080: 2 locks held by kworker/1:2/1094: 3 locks held by kworker/u8:5/1196: 3 locks held by kworker/R-ipv6_/2819: #0: ffff0000ccf3c140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000ccf3c140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff8000986c7c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000986c7c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e147c0 (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/u8:6/3675: 3 locks held by kworker/u8:7/3737: 3 locks held by kworker/u8:8/3806: #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: ffff80009b567c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80009b567c40 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e147c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:9/3853: 1 lock held by klogd/4335: 2 locks held by udevd/4346: 1 lock held by dhcpcd/4403: 2 locks held by kworker/0:3/4474: 1 lock held by crond/4478: 2 locks held by getty/4495: #0: ffff0000d17310a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009250b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/4712: 4 locks held by syz-executor/4718: 3 locks held by syz-executor/4723: 1 lock held by kworker/R-wg-cr/4780: #0: ffff800088bcd0c0 (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/4781: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 2 locks held by kworker/R-wg-cr/4784: 1 lock held by kworker/R-wg-cr/4790: #0: ffff800088bcd0c0 (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/4791: #0: ffff800088bcd0c0 (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/4792: #0: ffff800088bcd0c0 (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: ffff800088bcd0c0 (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/4795: #0: ffff800088bcd0c0 (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/4796: #0: ffff800088bcd0c0 (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/4797: #0: ffff800088bcd0c0 (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/4798: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 3 locks held by kworker/1:3/4799: 1 lock held by kworker/1:4/4800: 2 locks held by kworker/1:5/4807: 2 locks held by kworker/1:6/4814: 2 locks held by kworker/1:7/4821: 2 locks held by kworker/1:8/4822: 2 locks held by kworker/0:4/4840: 2 locks held by syz-executor/5248: #0: ffff000101fa60d8 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff000101fa60d8 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff000101fa60d8 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xd0/0xf8 fs/super.c:509 #1: ffff800088de5c80 (lock#4){+.+.}-{4:4}, at: __lru_add_drain_all+0x8c/0x4d4 mm/swap.c:891 1 lock held by kworker/R-wg-cr/5282: #0: ffff800088bcd0c0 (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/5284: #0: ffff800088bcd0c0 (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/5285: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 3 locks held by kworker/0:6/5514: #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: ffff8000999a7c40 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000999a7c40 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e147c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by kworker/R-bond1/5660: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 3 locks held by kworker/u8:10/5828: 4 locks held by kworker/u8:11/5852: 1 lock held by kworker/R-wg-cr/6060: #0: ffff800088bcd0c0 (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/6061: #0: ffff800088bcd0c0 (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/6064: #0: ffff800088bcd0c0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2737 1 lock held by syz.6.297/6452: #0: ffff0000fc39c0d8 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000fc39c0d8 (&type->s_umount_key#69){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline] #0: ffff0000fc39c0d8 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xd0/0xf8 fs/super.c:509 3 locks held by kworker/u8:12/6598: #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: ffff800093f07c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff800093f07c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e147c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:13/6600: 3 locks held by kworker/u8:14/6602: 3 locks held by kworker/u8:15/6606: 3 locks held by kworker/u8:16/6608: 2 locks held by kworker/u8:17/6613: 2 locks held by kworker/u8:18/6614: 2 locks held by kworker/u8:19/6675: 2 locks held by kworker/0:8/6676: 1 lock held by syz-executor/6678: 4 locks held by kworker/1:9/6679: =============================================