INFO: task kworker/0:0:20771 blocked for more than 143 seconds. Not tainted 5.15.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack: 0 pid:20771 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:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 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+0x194/0x3b4 drivers/base/dd.c:755 driver_probe_device+0x78/0x34c drivers/base/dd.c:785 __device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:907 bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427 __device_attach+0x2f0/0x480 drivers/base/dd.c:979 device_initial_probe+0x24/0x34 drivers/base/dd.c:1028 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+0x194/0x3b4 drivers/base/dd.c:755 driver_probe_device+0x78/0x34c drivers/base/dd.c:785 __device_attach_driver+0x28c/0x4d8 drivers/base/dd.c:907 bus_for_each_drv+0x158/0x1e0 drivers/base/bus.c:427 __device_attach+0x2f0/0x480 drivers/base/dd.c:979 device_initial_probe+0x24/0x34 drivers/base/dd.c:1028 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+0x790/0x11b8 kernel/workqueue.c:2307 worker_thread+0x910/0x1034 kernel/workqueue.c:2454 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: 1 lock held by khungtaskd/27: #0: ffff800014aa19e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268 1 lock held by hwrng/1219: #0: ffff800015a43568 (rng_mutex){+.+.}-{3:3}, at: get_current_rng+0x28/0x120 drivers/char/hw_random/core.c:127 2 locks held by getty/3724: #0: ffff0000d31e6098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001a34b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147 2 locks held by syz-executor.5/4009: #0: ffff0000cbbb4918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xe0/0x6b0 block/bdev.c:912 #1: ffff0000cbb2f468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa8/0x9b8 drivers/block/loop.c:1365 3 locks held by syz-executor.1/4019: 2 locks held by kworker/1:1/19681: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2280 #1: ffff80001ce47c00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2282 6 locks held by kworker/0:0/20771: #0: ffff0000c282ad38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2280 #1: ffff800021d27c00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2282 #2: ffff0000cefe4220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff0000cefe4220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c8/0x48c4 drivers/usb/core/hub.c:5676 #3: ffff0000d9c02220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff0000d9c02220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:954 #4: ffff0000c1bf71a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff0000c1bf71a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:954 #5: ffff800015a43568 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0xb4/0x4c8 drivers/char/hw_random/core.c:473 4 locks held by udevd/22540: #0: ffff0000c88600a0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #1: ffff00011c7d3488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x3a0 fs/kernfs/file.c:112 #2: ffff0000c7a3ce88 (kn->active#55){++++}-{0:0}, at: kernfs_seq_start+0x74/0x3a0 fs/kernfs/file.c:113 #3: ffff0000d9c02220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline] #3: ffff0000d9c02220 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x30/0xac drivers/usb/core/sysfs.c:141 1 lock held by syz-executor.2/28860: #0: ffff0000d32ec460 (sb_writers#3){.+.+}-{0:0}, at: do_coredump+0x12a4/0x2890 fs/coredump.c:825 2 locks held by syz-executor.1/28983: #0: ffff0000d32ec460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000db052bd0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #1: ffff0000db052bd0 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x200/0x464 fs/namei.c:3765 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