INFO: task kworker/u8:14:4509 blocked for more than 143 seconds. Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:14 state:D stack:0 pid:4509 tgid:4509 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_power_efficient reg_check_chans_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5397 [inline] __schedule+0x141c/0x2a14 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:844 Showing all locks held in the system: 1 lock held by kthreadd/2: 2 locks held by kworker/0:1/11: 2 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 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: 3 locks held by kworker/u8:3/42: 3 locks held by kworker/u8:4/62: 2 locks held by kworker/u8:5/240: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009c087bc0 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 3 locks held by kworker/u8:6/481: 2 locks held by kworker/u8:7/521: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009cea7bc0 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 3 locks held by kworker/u8:8/571: 3 locks held by kworker/u8:9/659: 3 locks held by kworker/u8:10/729: 3 locks held by kworker/u8:11/792: 3 locks held by kworker/R-ipv6_/4175: #0: ffff0000d2e40948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a2767ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4256: 2 locks held by kworker/u8:12/4472: 3 locks held by kworker/u8:13/4499: 4 locks held by kworker/u8:14/4509: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009e1c7bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5028768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000d5028768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d5028768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 3 locks held by kworker/u8:15/4564: 2 locks held by udevd/6148: 1 lock held by dhcpcd/6202: 1 lock held by dhcpcd/6203: 2 locks held by getty/6297: #0: ffff0000d30cc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba4b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 2 locks held by udevd/6525: 5 locks held by syz-executor/6532: #0: ffff0000fdd700e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000fdd700e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000fdd700e0 (&type->s_umount_key#51){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff0000c7b598c8 (&sbi->umount_mutex){+.+.}-{4:4}, at: f2fs_put_super+0xc0/0xeec fs/f2fs/super.c:1623 #2: ffff0000c7b58318 (&sbi->cp_global_sem){+.+.}-{4:4}, at: f2fs_down_write fs/f2fs/f2fs.h:2229 [inline] #2: ffff0000c7b58318 (&sbi->cp_global_sem){+.+.}-{4:4}, at: f2fs_write_checkpoint+0x1cc/0x1694 fs/f2fs/checkpoint.c:1625 #3: ffff0000c7b583b0 (&sbi->cp_rwsem){++++}-{4:4}, at: f2fs_down_write fs/f2fs/f2fs.h:2229 [inline] #3: ffff0000c7b583b0 (&sbi->cp_rwsem){++++}-{4:4}, at: f2fs_lock_all fs/f2fs/f2fs.h:2309 [inline] #3: ffff0000c7b583b0 (&sbi->cp_rwsem){++++}-{4:4}, at: block_operations fs/f2fs/checkpoint.c:1221 [inline] #3: ffff0000c7b583b0 (&sbi->cp_rwsem){++++}-{4:4}, at: f2fs_write_checkpoint+0x388/0x1694 fs/f2fs/checkpoint.c:1638 #4: ffff0000c7b58448 (&sbi->node_write){++++}-{4:4}, at: f2fs_down_write fs/f2fs/f2fs.h:2229 [inline] #4: ffff0000c7b58448 (&sbi->node_write){++++}-{4:4}, at: block_operations fs/f2fs/checkpoint.c:1271 [inline] #4: ffff0000c7b58448 (&sbi->node_write){++++}-{4:4}, at: f2fs_write_checkpoint+0xa48/0x1694 fs/f2fs/checkpoint.c:1638 4 locks held by syz-executor/6537: 1 lock held by syz-executor/6540: 3 locks held by syz-executor/6544: #0: ffff80008ff9c668 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline] #0: ffff80008ff9c668 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x1f8/0x3dc block/bio.c:1758 #1: ffff80008f702a30 (cpu_hotplug_lock){++++}-{0:0}, at: kmem_cache_destroy+0x48/0x178 mm/slab_common.c:510 #2: ffff80008f947578 (slab_mutex){+.+.}-{4:4}, at: kmem_cache_destroy+0x58/0x178 mm/slab_common.c:511 2 locks held by kworker/0:6/6614: 2 locks held by kworker/0:8/6652: 1 lock held by udevd/6805: 1 lock held by syz-executor/6874: 2 locks held by kworker/u8:16/10000: 3 locks held by kworker/1:6/10003: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff80009c047bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by syz-executor/10004: 2 locks held by kworker/0:9/10005: =============================================