INFO: task kworker/u8:14:8154 blocked for more than 154 seconds. Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:14 state:D stack:0 pid:8154 tgid:8154 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5377 [inline] __schedule+0x1360/0x257c kernel/sched/core.c:6764 __schedule_loop kernel/sched/core.c:6841 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6856 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6913 __mutex_lock_common+0xd30/0x24b8 kernel/locking/mutex.c:662 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 class_wiphy_constructor include/net/cfg80211.h:6061 [inline] reg_leave_invalid_chans net/wireless/reg.c:2468 [inline] reg_check_chans_work+0x134/0xe2c net/wireless/reg.c:2483 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 3 locks held by kworker/u8:1/13: 3 locks held by kworker/1:1/27: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff800097e37ba0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff800092b652a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by khungtaskd/31: #0: ffff80008fdb1ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 1 lock held by khugepaged/36: 3 locks held by kworker/u8:2/42: 3 locks held by kworker/u8:4/113: 3 locks held by kworker/u8:5/224: 3 locks held by kworker/u8:6/710: 4 locks held by kworker/u8:9/2114: 2 locks held by kworker/1:2/2272: 3 locks held by kworker/u8:10/4621: 2 locks held by syslogd/6043: 3 locks held by udevd/6058: 3 locks held by dhcpcd/6112: 2 locks held by getty/6205: #0: ffff0000d26ec0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bc9e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/6429: 2 locks held by syz-executor/6441: 1 lock held by syz-executor/6444: #0: ffff80008fdb6ff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline] #0: ffff80008fdb6ff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x354/0x674 kernel/rcu/tree_exp.h:996 1 lock held by syz-executor/6454: 3 locks held by kworker/u8:11/6552: 2 locks held by syz-executor/7669: 6 locks held by kworker/u8:12/8152: 3 locks held by kworker/u8:13/8153: 4 locks held by kworker/u8:14/8154: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff8000a1557ba0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff800092b652a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 #3: ffff0000d6950768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline] #3: ffff0000d6950768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2468 [inline] #3: ffff0000d6950768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x134/0xe2c net/wireless/reg.c:2483 2 locks held by kworker/u8:16/8156: 2 locks held by kworker/u8:18/8158: 3 locks held by kworker/u8:19/8161: 3 locks held by kworker/u8:20/8162: #0: ffff0000d1493148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff8000a14f7ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff800092b652a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.2.490/8526: #0: ffff800092b652a8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by syz-executor/8560: =============================================