INFO: task kworker/u8:7:2215 blocked for more than 145 seconds. Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:7 state:D stack:0 pid:2215 tgid:2215 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:741 (T) context_switch kernel/sched/core.c:5397 [inline] __schedule+0x1414/0x2a28 kernel/sched/core.c:6786 __schedule_loop kernel/sched/core.c:6864 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6879 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6936 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 class_wiphy_constructor include/net/cfg80211.h:6062 [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+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:843 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/0:1/10: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff800097a77bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/32: #0: ffff80008f869980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: 2 locks held by kworker/u8:3/42: 4 locks held by pr/ttyAMA0/43: 3 locks held by kworker/u8:4/268: #0: ffff0000d21cf148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009c1b7bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/u8:7/2215: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a0c37bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d3898768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000d3898768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d3898768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 2 locks held by kworker/0:2/2311: 3 locks held by kworker/u8:8/4413: 3 locks held by kworker/u8:9/4502: 1 lock held by jbd2/nvme0n1p2-/6105: 1 lock held by klogd/6129: 2 locks held by udevd/6140: 2 locks held by getty/6288: #0: ffff0000d75500a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba3e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6512: 2 locks held by kworker/1:5/6581: 4 locks held by syz-executor/6869: 4 locks held by syz-executor/7312: 2 locks held by kworker/u8:10/7464: 3 locks held by kworker/u8:11/7485: 3 locks held by kworker/u8:12/7486: 1 lock held by udevd/7535: 1 lock held by udevd/7542: 1 lock held by udevd/7543: 2 locks held by udevd/7583: 1 lock held by udevd/7746: 4 locks held by udevd/7825: 3 locks held by kworker/u8:13/8153: 3 locks held by kworker/u8:14/8155: 3 locks held by kworker/u8:15/8157: 3 locks held by kworker/u8:16/8161: 3 locks held by kworker/u8:17/8164: 3 locks held by kworker/u8:18/8169: 3 locks held by kworker/u8:19/8172: 3 locks held by kworker/u8:20/8173: 2 locks held by syz.0.361/8767: 1 lock held by udevadm/8795: 3 locks held by sed/8841: 3 locks held by kworker/u8:21/8843: 2 locks held by kworker/u8:22/8845: 2 locks held by kworker/1:8/8846: 2 locks held by syz-executor/8847: 3 locks held by kworker/u8:23/8848: 2 locks held by kworker/1:9/8851: =============================================