INFO: task kworker/0:1:7 blocked for more than 143 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:25568 pid:    7 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/0:2:1053 blocked for more than 144 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D stack:25056 pid: 1053 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/0:3:3613 blocked for more than 144 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:25264 pid: 3613 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/1:5:3614 blocked for more than 146 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5     state:D stack:25568 pid: 3614 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/1:8:3619 blocked for more than 146 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8     state:D stack:25568 pid: 3619 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/0:7:3635 blocked for more than 147 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7     state:D stack:24048 pid: 3635 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/0:9:3646 blocked for more than 148 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9     state:D stack:24704 pid: 3646 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_timeout+0x1cf/0x290
 wait_for_completion+0x171/0x270
 virtio_cleanup+0x78/0x90
 drop_current_rng+0xda/0x110
 set_current_rng+0x2c7/0x480
 hwrng_register+0x3bd/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
INFO: task kworker/0:12:3714 blocked for more than 149 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:12    state:D stack:25344 pid: 3714 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 __schedule+0xaf1/0x26d0
 schedule+0xde/0x280
 schedule_preempt_disabled+0xf/0x20
 __mutex_lock+0x911/0x1310
 hwrng_register+0x7a/0x610
 chaoskey_probe+0x76c/0xc40
 usb_probe_interface+0x30d/0x7d0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_set_configuration+0xece/0x19d0
 usb_generic_driver_probe+0xb4/0xf0
 usb_probe_device+0xdb/0x2c0
 really_probe+0x232/0xcb0
 __driver_probe_device+0x337/0x4d0
 driver_probe_device+0x4c/0x1a0
 __device_attach_driver+0x202/0x2f0
 bus_for_each_drv+0x155/0x1d0
 __device_attach+0x1db/0x490
 bus_probe_device+0x1e4/0x290
 device_add+0xc5c/0x20d0
 usb_new_device.cold+0x660/0x10e5
 hub_event+0x221a/0x46f0
 process_one_work+0xa11/0x1680
 worker_thread+0x67d/0x1220
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30

Showing all locks held in the system:
6 locks held by kworker/0:1/7:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90000edfda0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff888147e1c220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff88805e163220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff8880715a71a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
1 lock held by khungtaskd/27:
 #0: ffffffff8b97dba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
6 locks held by kworker/0:2/1053:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90004877da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff888147d3e220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff888017da0220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88806e8b61a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
3 locks held by syslogd/2953:
 #0: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x241/0x26d0
 #1: ffff8880b9c1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x163/0x480
 #2: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: try_to_wake_up+0x4be/0x1380
2 locks held by getty/3282:
 #0: ffff88807fa16098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x80
 #1: ffffc9000245e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7b/0x1480
3 locks held by udevd/3612:
 #0: ffff88805e07f488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88805e6422c0 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff88805e82a220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
6 locks held by kworker/0:3/3613:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90002d27da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff88801eafd220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff88805e82a220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88805e1a21a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
6 locks held by kworker/1:5/3614:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90003517da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff88801eab1220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff88806ecc8220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88801c7ca1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
3 locks held by udevd/3615:
 #0: ffff88805e221488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88805e6912c0 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff88806a4f8220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
6 locks held by kworker/1:8/3619:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90003557da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff88801e9ab220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff888018a5c220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88801de361a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
6 locks held by kworker/0:7/3635:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc90003597da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff88801eae0220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff88805dc10220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88805e3261a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
6 locks held by kworker/0:9/3646:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc900035b7da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff888147d4a220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff88806a4f8220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88805e06d1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
3 locks held by udevd/3702:
 #0: ffff888071556c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88805f04b4d0 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff88805e163220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
3 locks held by udevd/3709:
 #0: ffff88801fa22088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88801e3186a0 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff888018a5c220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
3 locks held by udevd/3711:
 #0: ffff88806edcc488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88805f07f0f0 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff88805dc10220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
3 locks held by udevd/3712:
 #0: ffff888076deb488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x181/0x5c0
 #1: ffff88801f7cc830 (kn->active#56){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a4/0x5c0
 #2: ffff88806ecc8220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0
6 locks held by kworker/0:12/3714:
 #0: ffff888141dc5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8f5/0x1680
 #1: ffffc900039d7da0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1680
 #2: ffff888147d57220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ae/0x46f0
 #3: ffff8880178ee220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #4: ffff88806e80a1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x490
 #5: ffffffff8c3d0a48 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0x7a/0x610
2 locks held by dhcpcd/4531:
 #0: ffff88807a942120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x35/0xd50
 #1: ffffffff8b986ee8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 dump_stack_lvl+0xfc/0x174
 nmi_cpu_backtrace.cold+0x22/0x16f
 nmi_trigger_cpumask_backtrace+0x1b2/0x230
 watchdog+0xcda/0x1030
 kthread+0x3d0/0x4c0
 ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c8/0x250
