INFO: task kworker/1:7:6198 blocked for more than 143 seconds. Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:7 state:D stack:0 pid:6198 ppid:2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1364/0x23b4 kernel/sched/core.c:6695 schedule+0xc4/0x170 kernel/sched/core.c:6771 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 hub_port_connect drivers/usb/core/hub.c:5357 [inline] hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] port_event drivers/usb/core/hub.c:5759 [inline] hub_event+0x1e58/0x433c drivers/usb/core/hub.c:5841 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008e513840 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:302 2 locks held by getty/5847: #0: ffff0000d7ab00a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094c002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2206 5 locks held by kworker/1:3/6094: #0: ffff0000c2287138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603 #1: ffff800096bf7c20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605 #2: ffff0000cdc17190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff0000cdc17190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1b8/0x433c drivers/usb/core/hub.c:5787 #3: ffff0000cdc9a520 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3150 [inline] #3: ffff0000cdc9a520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5356 [inline] #3: ffff0000cdc9a520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] #3: ffff0000cdc9a520 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5759 [inline] #3: ffff0000cdc9a520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e2c/0x433c drivers/usb/core/hub.c:5841 #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5357 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5759 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1e58/0x433c drivers/usb/core/hub.c:5841 5 locks held by kworker/1:7/6198: #0: ffff0000c2287138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603 #1: ffff8000973a7c20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605 #2: ffff0000cdc01190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #2: ffff0000cdc01190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1b8/0x433c drivers/usb/core/hub.c:5787 #3: ffff0000cdc04520 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3150 [inline] #3: ffff0000cdc04520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5356 [inline] #3: ffff0000cdc04520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] #3: ffff0000cdc04520 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5759 [inline] #3: ffff0000cdc04520 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e2c/0x433c drivers/usb/core/hub.c:5841 #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5357 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5599 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5759 [inline] #4: ffff0000cd0b1c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1e58/0x433c drivers/usb/core/hub.c:5841 2 locks held by kworker/1:8/6199: #0: ffff0000c0022938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603 #1: ffff8000973c7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605 2 locks held by kworker/u4:19/6961: 2 locks held by syz-executor.3/25311: #0: ffff800090d37728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffff800090d37728 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdc0 net/core/rtnetlink.c:6439 #1: ffff80008e519178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffff80008e519178 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:992 1 lock held by syz-executor.1/25337: #0: ffff800090d37728 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffff800090d37728 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x704/0xdc0 net/core/rtnetlink.c:6439 =============================================