INFO: task kworker/u8:8:631 blocked for more than 149 seconds. Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:8 state:D stack:0 pid:631 tgid:631 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 class_wiphy_constructor include/net/cfg80211.h:6092 [inline] reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 Showing all locks held in the system: 1 lock held by kthreadd/2: 1 lock held by kworker/R-kvfre/6: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 2 locks held by kworker/0:0/9: 5 locks held by kworker/0:1/11: 2 locks held by kworker/u8:0/12: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097657bc0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 1 lock held by kworker/R-mm_pe/13: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 4 locks held by kworker/u8:1/14: 2 locks held by kworker/1:0/24: 3 locks held by kworker/1:1/26: 1 lock held by khungtaskd/32: #0: ffff80008f508920 (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: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 4 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 3 locks held by kworker/u8:4/115: 3 locks held by kworker/u8:5/173: 3 locks held by kworker/u8:6/495: 3 locks held by kworker/u8:7/586: 4 locks held by kworker/u8:8/631: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0} , at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009cc27bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff000103970768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff000103970768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff000103970768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 3 locks held by kworker/u8:9/746: 2 locks held by kworker/1:2/1766: 3 locks held by kworker/u8:10/2181: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0817bc0 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: idle_cull_fn+0xc4/0x60c kernel/workqueue.c:2960 2 locks held by kworker/1:3/2309: 3 locks held by kworker/R-ipv6_/4143: #0: ffff0000d3521148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1567ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/R-bat_e/4224: 1 lock held by klogd/6096: 2 locks held by dhcpcd/6161: 1 lock held by dhcpcd/6162: 2 locks held by getty/6252: #0: ffff0000c32860a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5eb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 2 locks held by kworker/0:3/6482: 4 locks held by syz-executor/6491: 4 locks held by syz-executor/6500: 3 locks held by syz-executor/6504: 1 lock held by kworker/R-wg-cr/6531: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/6532: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529 2 locks held by kworker/0:4/6539: 4 locks held by kworker/0:5/6540: 3 locks held by kworker/0:6/6541: 1 lock held by kworker/0:7/6569: 3 locks held by kworker/1:5/6570: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a14e7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248e928 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by kmmpd-loop3/7069: #0: ffff000100b64420 (sb_writers#3){.+.+}-{0:0}, at: kmmpd+0x2ec/0x9b8 fs/ext4/mmp.c:178 1 lock held by syz-executor/7073: 1 lock held by syz-executor/7104: 1 lock held by kworker/R-bond0/7222: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/7230: 1 lock held by kworker/R-wg-cr/7238: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529 1 lock held by kworker/R-wg-cr/7280: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/7281: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 3 locks held by kworker/u8:11/7294: 1 lock held by kworker/R-wg-cr/7295: #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f3b0f48 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529 1 lock held by kmmpd-loop0/7323: #0: ffff0000f7a90420 (sb_writers#3){.+.+}-{0:0}, at: kmmpd+0x2ec/0x9b8 fs/ext4/mmp.c:178 3 locks held by kworker/u8:12/8326: 3 locks held by kworker/u8:13/8327: 1 lock held by kmmpd-loop6/9487: #0: ffff0000f7a88420 (sb_writers#3){.+.+}-{0:0}, at: kmmpd+0x2ec/0x9b8 fs/ext4/mmp.c:178 2 locks held by modprobe/9729: 2 locks held by kworker/u8:14/9730: 4 locks held by kworker/u8:15/9731: 4 locks held by kworker/u8:16/9732: 2 locks held by syz-executor/9733: =============================================