INFO: task pool_workqueue_:3 blocked for more than 143 seconds. Not tainted 6.15.0-rc6-syzkaller-ga82e92598ab1 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:pool_workqueue_ state:D stack:0 pid:3 tgid:3 ppid:2 task_flags:0x208040 flags:0x00000010 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_timeout+0xac/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common+0x288/0x3f8 kernel/sched/completion.c:95 __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x48/0x70 kernel/sched/completion.c:264 __wait_rcu_gp+0x284/0x2b8 kernel/rcu/update.c:443 synchronize_rcu_normal+0x16c/0x1bc kernel/rcu/tree.c:3235 synchronize_rcu+0x1ec/0x250 kernel/rcu/tree.c:3313 lockdep_unregister_key+0x2f8/0x3c0 kernel/locking/lockdep.c:6617 wq_unregister_lockdep kernel/workqueue.c:4816 [inline] pwq_release_workfn+0x5ac/0x6e4 kernel/workqueue.c:5112 kthread_worker_fn+0x43c/0xb34 kernel/kthread.c:1010 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: 2 locks held by kworker/0:0/9: 2 locks held by kworker/0:1/11: 5 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 2 locks held by kworker/1:0/24: 2 locks held by kworker/1:1/26: 1 lock held by khungtaskd/32: #0: ffff80008f5088a0 (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/u8:3/45: 1 lock held by pr/ttyAMA0/46: 6 locks held by kworker/u9:0/55: #0: ffff0000c9af3148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097e07bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000dd5c0d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000dd5c0078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2049 [inline] #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x318 net/bluetooth/hci_conn.c:1269 #5: ffff0000c955b338 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x74/0x5f0 net/bluetooth/l2cap_core.c:1761 3 locks held by kworker/u8:4/133: 3 locks held by kworker/u8:5/198: 2 locks held by kworker/u8:6/300: 4 locks held by kworker/u8:7/554: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800098fb7bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b428 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d7308768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d7308768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d7308768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 2 locks held by kworker/0:2/1803: 3 locks held by kworker/R-ipv6_/4139: #0: ffff0000d2dd2948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009e1e7ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009248b428 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by kworker/R-bat_e/4220: 1 lock held by klogd/6092: 2 locks held by udevd/6103: 2 locks held by getty/6261: #0: ffff0000d8a000a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6476: 2 locks held by kworker/1:3/6478: 1 lock held by udevd/6479: 1 lock held by kworker/0:3/6493: 5 locks held by kworker/u9:5/6497: #0: ffff0000cb185948 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009d2f7bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d5734d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000d5734078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2049 [inline] #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x318 net/bluetooth/hci_conn.c:1269 5 locks held by kworker/u9:6/6499: #0: ffff0000f1f12948 ((wq_completion)hci2#3){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009d2e7bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000f4b84d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000f4b84078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2049 [inline] #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x318 net/bluetooth/hci_conn.c:1269 4 locks held by syz-executor/6501: 5 locks held by kworker/u9:7/6503: #0: ffff0000c4fa3148 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009d2d7bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d9324d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000d9324078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2049 [inline] #4: ffff8000925f16c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x318 net/bluetooth/hci_conn.c:1269 1 lock held by kworker/R-wg-cr/6538: 2 locks held by kworker/0:4/6541: 2 locks held by kworker/0:5/6542: 2 locks held by kworker/1:4/6543: 4 locks held by kworker/0:6/6544: 4 locks held by kworker/u8:8/6558: 4 locks held by kworker/0:7/6574: 1 lock held by udevd/6606: 2 locks held by udevd/6610: 2 locks held by udevd/6611: 3 locks held by kworker/u8:9/6789: 3 locks held by kworker/u8:10/7038: 4 locks held by kworker/u8:11/7106: 2 locks held by kworker/u8:12/7602: 3 locks held by kworker/u8:13/7603: 3 locks held by kworker/u8:14/7604: 1 lock held by syz-executor/7655: #0: ffff80008f50e3b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline] #0: ffff80008f50e3b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x290/0x624 kernel/rcu/tree_exp.h:998 4 locks held by syz-executor/7785: 1 lock held by kworker/R-wg-cr/8012: 2 locks held by syz-executor/8030: 4 locks held by kworker/1:6/8332: #0: ffff0000cf382d48 ((wq_completion)wg-kex-wg0#16){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009bf47bc0 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __ptr = (unsigned long) ((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))); (typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000f0b85308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_response+0x180/0x988 drivers/net/wireguard/noise.c:742 #3: ffff0000ca5534c0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_response+0x20c/0x988 drivers/net/wireguard/noise.c:753 3 locks held by kworker/1:7/8333: 2 locks held by sed/9123: 3 locks held by kworker/u8:15/9127: 3 locks held by kworker/u8:16/9128: 1 lock held by kworker/u8:17/9129: =============================================