INFO: task kworker/u8:10:7210 blocked for more than 146 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:10 state:D stack:0 pid:7210 tgid:7210 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (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:862 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 7 locks held by kworker/u8:1/14: 2 locks held by kworker/1:0/24: 2 locks held by kworker/1:1/26: 1 lock held by khungtaskd/32: #0: ffff80008f4e7d20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 3 locks held by kworker/u8:4/308: 3 locks held by kworker/u8:5/688: 4 locks held by kworker/u8:6/2105: 3 locks held by kworker/u8:7/2184: 3 locks held by kworker/1:2/2299: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0b27bc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff800092467728 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4221: 3 locks held by kworker/u8:8/4413: 2 locks held by syslogd/6090: 2 locks held by udevd/6105: 1 lock held by dhcpcd/6158: 1 lock held by dhcpcd/6159: 2 locks held by getty/6246: #0: ffff0000d2f920a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5ae2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 1 lock held by kworker/1:3/6485: 2 locks held by syz-executor/6501: 2 locks held by syz-executor/6506: 2 locks held by udevd/6508: 1 lock held by kworker/R-wg-cr/6524: 1 lock held by kworker/R-wg-cr/6535: #0: ffff80008f390348 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f390348 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529 1 lock held by kworker/R-wg-cr/6537: 1 lock held by kworker/R-wg-cr/6539: #0: ffff80008f390348 (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/6541: #0: ffff80008f390348 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 2 locks held by kworker/1:4/6543: 2 locks held by kworker/1:5/6544: 2 locks held by kworker/1:6/6551: 4 locks held by kworker/1:7/6586: 3 locks held by syz.3.189/7171: #0: ffff0000d09ce0e0 (&type->s_umount_key#81){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000d09ce0e0 (&type->s_umount_key#81){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000d09ce0e0 (&type->s_umount_key#81){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff0000eee7a160 (&journal->j_barrier){+.+.}-{4:4}, at: jbd2_journal_lock_updates+0x258/0x2fc fs/jbd2/transaction.c:885 #2: ffff0000eee7a3e8 (&journal->j_checkpoint_mutex){+.+.}-{4:4}, at: jbd2_journal_flush+0x1f8/0xa40 fs/jbd2/journal.c:2432 3 locks held by kworker/u8:9/7209: 4 locks held by kworker/u8:10/7210: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a4927bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff800092467728 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d2728768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d2728768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d2728768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 3 locks held by kworker/u8:11/7212: #0: ffff0000d26f6148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a3197bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff800092467728 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/u8:12/7213: 2 locks held by kworker/1:8/7215: 2 locks held by syz-executor/7217: =============================================