INFO: task kworker/u8:2:39 blocked for more than 150 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:2 state:D stack:0 pid:39 tgid:39 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:5388 [inline] __schedule+0x1c04/0x2db8 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7283 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x4fc/0xed0 kernel/locking/mutex.c:820 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873 class_wiphy_constructor include/net/cfg80211.h:6646 [inline] reg_leave_invalid_chans net/wireless/reg.c:2454 [inline] reg_check_chans_work+0x144/0x10e8 net/wireless/reg.c:2469 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3397 worker_thread+0x798/0xbd0 kernel/workqueue.c:3478 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 INFO: task kworker/R-ipv6_:2818 blocked for more than 150 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:2818 tgid:2818 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: ipv6_addrconf addrconf_verify_work Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1c04/0x2db8 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7283 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x4fc/0xed0 kernel/locking/mutex.c:820 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873 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:4746 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3397 rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3621 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: 3 locks held by kworker/0:0/9: 3 locks held by kworker/u8:0/12: 4 locks held by kworker/u8:1/15: 2 locks held by kworker/1:0/24: 1 lock held by khungtaskd/31: #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 4 locks held by kworker/u8:2/39: #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800090087c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800090087c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000f0900780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6646 [inline] #3: ffff0000f0900780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2454 [inline] #3: ffff0000f0900780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x144/0x10e8 net/wireless/reg.c:2469 2 locks held by kworker/u8:3/40: 3 locks held by kworker/u8:4/912: 3 locks held by kworker/0:2/1092: 4 locks held by kworker/u8:5/1808: 3 locks held by kworker/R-ipv6_/2818: #0: ffff0000ceafc940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000ceafc940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800099987c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800099987c60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/R-bat_e/2853: 3 locks held by kworker/u8:6/3393: 3 locks held by kworker/u8:7/3463: 3 locks held by kworker/u8:8/3816: 1 lock held by klogd/4328: 2 locks held by udevd/4339: 1 lock held by dhcpcd/4394: 3 locks held by kworker/1:3/4468: 2 locks held by getty/4488: #0: ffff0000cf47e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000923ab2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf70 drivers/tty/n_tty.c:2211 3 locks held by syz-executor/4712: 1 lock held by kworker/R-wg-cr/4783: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4784: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4785: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 3 locks held by kworker/1:5/4794: 3 locks held by kworker/0:4/4810: 4 locks held by kworker/1:6/4815: #0: ffff0000cec38140 ((wq_completion)wg-kex-wg0#12){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000cec38140 ((wq_completion)wg-kex-wg0#12){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800096ec7c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800096ec7c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff0000ede593c0 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x134/0x53c drivers/net/wireguard/noise.c:598 #3: ffff0000eddae640 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x208/0x53c drivers/net/wireguard/noise.c:632 3 locks held by kworker/0:5/4826: #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800092807c40 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800092807c40 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by kworker/R-wg-cr/4990: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline] #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xa58/0xd90 kernel/workqueue.c:3649 1 lock held by kworker/R-wg-cr/4991: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 1 lock held by kworker/R-wg-cr/4992: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 3 locks held by kworker/u8:9/5020: 3 locks held by kworker/u8:10/5021: 2 locks held by kworker/1:8/5022: 4 locks held by kworker/u8:11/5023: 3 locks held by kworker/u8:12/5081: 3 locks held by kworker/u8:13/5083: 4 locks held by kworker/u8:14/5085: 2 locks held by kworker/u8:15/5087: 3 locks held by kworker/u8:16/5089: 2 locks held by kworker/u8:17/5091: 4 locks held by kworker/u8:18/5096: 1 lock held by kworker/R-bond1/6873: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 4 locks held by syz-executor/7144: 1 lock held by kworker/R-bond3/7209: #0: ffff800088a9df40 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x344 kernel/workqueue.c:2729 3 locks held by kworker/0:7/7387: 1 lock held by syz-executor/8212: 1 lock held by kworker/R-bond2/8634: 2 locks held by udevd/8967: 2 locks held by udevd/8973: 1 lock held by udevd/8975: 2 locks held by syz.5.870/9241: #0: ffff0000dd96b040 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #0: ffff0000dd96b040 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x7c/0x1d4 net/socket.c:721 #1: ffff0000d6c16260 (sk_lock-AF_CAN){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline] #1: ffff0000d6c16260 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x1b0/0x818 net/can/bcm.c:1611 2 locks held by kworker/u8:19/9254: 3 locks held by kworker/u8:20/9255: 3 locks held by syz-executor/9256: 4 locks held by kworker/u8:21/9257: 2 locks held by kworker/u8:22/9258: =============================================