INFO: task kworker/1:21:15742 blocked for more than 143 seconds. Not tainted 6.2.0-rc7-syzkaller-17891-geaed33698e35 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:21 state:D stack:0 pid:15742 ppid:2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x210/0x424 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5293 [inline] __schedule+0x6a4/0xb34 kernel/sched/core.c:6606 schedule+0x64/0xa4 kernel/sched/core.c:6682 usb_kill_urb+0xe0/0x1c8 drivers/usb/core/urb.c:728 usb_start_wait_urb+0xf4/0x1ec drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0xd8/0x17c drivers/usb/core/message.c:153 hub_port_init+0x514/0x1088 drivers/usb/core/hub.c:4875 hub_port_connect drivers/usb/core/hub.c:5337 [inline] hub_port_connect_change drivers/usb/core/hub.c:5552 [inline] port_event drivers/usb/core/hub.c:5712 [inline] hub_event+0x1504/0x26d4 drivers/usb/core/hub.c:5794 process_one_work+0x3ac/0x9d0 kernel/workqueue.c:2289 worker_thread+0x340/0x608 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffff80000d4855c8 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x448 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/12: #0: ffff80000d485c18 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x448 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/27: #0: ffff80000d4854a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:324 1 lock held by udevd/3942: 2 locks held by getty/4096: #0: ffff0000c79cb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f6962f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x28c/0xbc4 drivers/tty/n_tty.c:2177 2 locks held by kworker/1:8/4549: #0: ffff0000c0012f38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x274/0x9d0 kernel/workqueue.c:2262 #1: ffff800012f8bd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x2a0/0x9d0 kernel/workqueue.c:2264 3 locks held by kworker/1:9/4552: #0: ffff0000c7208138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x274/0x9d0 kernel/workqueue.c:2262 #1: ffff800013a03d80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x2a0/0x9d0 kernel/workqueue.c:2264 #2: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:75 2 locks held by kworker/1:15/13042: #0: ffff0000c0012738 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x274/0x9d0 kernel/workqueue.c:2262 #1: ffff800013fb3d80 (xfrm_state_gc_work){+.+.}-{0:0}, at: process_one_work+0x2a0/0x9d0 kernel/workqueue.c:2264 5 locks held by kworker/1:21/15742: #0: ffff0000c0c0e938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x274/0x9d0 kernel/workqueue.c:2262 #1: ffff80001502bd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x2a0/0x9d0 kernel/workqueue.c:2264 #2: ffff0000c666c990 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff0000c666c990 (&dev->mutex){....}-{3:3}, at: hub_event+0x94/0x26d4 drivers/usb/core/hub.c:5740 #3: ffff0000c666e508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3148 [inline] #3: ffff0000c666e508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5304 [inline] #3: ffff0000c666e508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5552 [inline] #3: ffff0000c666e508 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5712 [inline] #3: ffff0000c666e508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1234/0x26d4 drivers/usb/core/hub.c:5794 #4: ffff0000c67a2e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5305 [inline] #4: ffff0000c67a2e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5552 [inline] #4: ffff0000c67a2e68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5712 [inline] #4: ffff0000c67a2e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1244/0x26d4 drivers/usb/core/hub.c:5794 1 lock held by syz-executor.5/24324: #0: ffff80000d486940 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x2f8 kernel/rcu/tree.c:3997 1 lock held by syz-executor.0/24325: #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x448/0x7e0 net/core/rtnetlink.c:6138 1 lock held by syz-executor.0/24347: #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x448/0x7e0 net/core/rtnetlink.c:6138 2 locks held by syz-executor.4/24323: #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffff80000d8589f8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x448/0x7e0 net/core/rtnetlink.c:6138 #1: ffff80000d486a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #1: ffff80000d486a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x244/0x4c0 kernel/rcu/tree_exp.h:946 =============================================