INFO: task kworker/1:0:21 blocked for more than 145 seconds. Not tainted 5.15.103-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack: 0 pid: 21 ppid: 2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5023 [inline] __schedule+0xfcc/0x1f1c kernel/sched/core.c:6369 schedule+0x11c/0x1c8 kernel/sched/core.c:6452 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1860 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138 virtio_cleanup+0x7c/0xa4 drivers/char/hw_random/virtio-rng.c:85 cleanup_rng drivers/char/hw_random/core.c:82 [inline] kref_put include/linux/kref.h:65 [inline] drop_current_rng+0xa8/0x140 drivers/char/hw_random/core.c:110 set_current_rng+0x358/0x4ac drivers/char/hw_random/core.c:97 hwrng_register+0x31c/0x4c8 drivers/char/hw_random/core.c:500 chaoskey_probe+0x618/0x92c drivers/usb/misc/chaoskey.c:205 usb_probe_interface+0x500/0x984 drivers/usb/core/driver.c:396 really_probe+0x26c/0xaec drivers/base/dd.c:595 __driver_probe_device+0x1bc/0x3f8 drivers/base/dd.c:750 driver_probe_device+0x78/0x34c drivers/base/dd.c:780 __device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:902 bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427 __device_attach+0x2f0/0x480 drivers/base/dd.c:974 device_initial_probe+0x24/0x34 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1c8 drivers/base/bus.c:487 device_add+0xae0/0xef4 drivers/base/core.c:3394 usb_set_configuration+0x15e0/0x1b60 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x8c/0x148 drivers/usb/core/generic.c:238 usb_probe_device+0x120/0x25c drivers/usb/core/driver.c:293 really_probe+0x26c/0xaec drivers/base/dd.c:595 __driver_probe_device+0x1bc/0x3f8 drivers/base/dd.c:750 driver_probe_device+0x78/0x34c drivers/base/dd.c:780 __device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:902 bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427 __device_attach+0x2f0/0x480 drivers/base/dd.c:974 device_initial_probe+0x24/0x34 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1c8 drivers/base/bus.c:487 device_add+0xae0/0xef4 drivers/base/core.c:3394 usb_new_device+0x8fc/0x1448 drivers/usb/core/hub.c:2568 hub_port_connect drivers/usb/core/hub.c:5358 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5648 [inline] hub_event+0x22e4/0x48c4 drivers/usb/core/hub.c:5730 process_one_work+0x84c/0x14b8 kernel/workqueue.c:2306 worker_thread+0x910/0x1034 kernel/workqueue.c:2453 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Showing all locks held in the system: 6 locks held by kworker/1:0/21: #0: ffff0000c2c49538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x66c/0x14b8 kernel/workqueue.c:2279 #1: ffff800018a97c00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x14b8 kernel/workqueue.c:2281 #2: ffff0000cdfd1220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff0000cdfd1220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c8/0x48c4 drivers/usb/core/hub.c:5676 #3: ffff000118bb2220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff000118bb2220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:949 #4: ffff000118bb41a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff000118bb41a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:949 #5: ffff800015b3ce28 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0xb4/0x4c8 drivers/char/hw_random/core.c:473 1 lock held by khungtaskd/27: #0: ffff800014b92620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268 3 locks held by kworker/u4:4/410: 1 lock held by hwrng/1218: #0: ffff800015b3ce28 (rng_mutex){+.+.}-{3:3}, at: get_current_rng+0x28/0x120 drivers/char/hw_random/core.c:127 3 locks held by kworker/u4:5/1364: 1 lock held by udevd/3586: 2 locks held by getty/3737: #0: ffff0000d2ade098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001a44b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147 1 lock held by syz-executor.4/4095: 3 locks held by kworker/u5:5/4109: #0: ffff0000d6e32938 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x66c/0x14b8 kernel/workqueue.c:2279 #1: ffff80001cee7c00 ((work_completion)(&hdev->error_reset)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x14b8 kernel/workqueue.c:2281 #2: ffff0000c1fecff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0xb8/0x1020 net/bluetooth/hci_core.c:1446 2 locks held by kworker/u4:8/5007: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x14b8 kernel/workqueue.c:2279 #1: ffff80001ede7c00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x14b8 kernel/workqueue.c:2281 2 locks held by kworker/u4:13/5154: 2 locks held by kworker/u4:14/6765: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x14b8 kernel/workqueue.c:2279 #1: ffff80001ef37c00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x14b8 kernel/workqueue.c:2281 4 locks held by udevd/8777: #0: ffff00011b298b08 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #1: ffff000119571488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x3a0 fs/kernfs/file.c:112 #2: ffff000118bf9008 (kn->active#65){++++}-{0:0}, at: kernfs_seq_start+0x74/0x3a0 fs/kernfs/file.c:113 #3: ffff000118bb2220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline] #3: ffff000118bb2220 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x30/0xac drivers/usb/core/sysfs.c:141 1 lock held by syz-executor.5/15992: #0: ffff0001b4814d18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:475 [inline] #0: ffff0001b4814d18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1325 [inline] #0: ffff0001b4814d18 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline] #0: ffff0001b4814d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x328/0x1f1c kernel/sched/core.c:6283 =============================================