INFO: task kworker/1:10:3907 blocked for more than 146 seconds.
      Not tainted 5.15.104-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:10    state:D stack:20632 pid: 3907 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5023 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6369
 schedule+0x11b/0x1f0 kernel/sched/core.c:6452
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6511
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
 hwrng_register+0x3da/0x4c0 drivers/char/hw_random/core.c:518
 chaoskey_probe+0x79d/0xb40 drivers/usb/misc/chaoskey.c:205
 usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396
 really_probe+0x24e/0xb60 drivers/base/dd.c:595
 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750
 driver_probe_device+0x50/0x420 drivers/base/dd.c:780
 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:974
 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
 device_add+0xb48/0xfd0 drivers/base/core.c:3394
 usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238
 usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293
 really_probe+0x24e/0xb60 drivers/base/dd.c:595
 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:750
 driver_probe_device+0x50/0x420 drivers/base/dd.c:780
 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:902
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:974
 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
 device_add+0xb48/0xfd0 drivers/base/core.c:3394
 usb_new_device+0xc17/0x18d0 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+0x2dd8/0x56d0 drivers/usb/core/hub.c:5730
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91b920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/901:
 #0: ffffffff8cfeee28 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xdd/0x280 drivers/char/hw_random/core.c:436
2 locks held by getty/3270:
 #0: ffff88814ab62098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
4 locks held by udevd/3632:
 #0: ffff888073ee1e80 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xae/0xd10 fs/seq_file.c:182
 #1: ffff88807a8b6c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x50/0x3b0 fs/kernfs/file.c:112
 #2: ffff888042d601d8 (kn->active#92){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x3b0 fs/kernfs/file.c:113
 #3: ffff8880418d0220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline]
 #3: ffff8880418d0220 (&dev->mutex){....}-{3:3}, at: serial_show+0x22/0x90 drivers/usb/core/sysfs.c:142
6 locks held by kworker/0:5/3680:
 #0: ffff888016d88d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
 #1: ffffc9000373fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
 #2: ffff88801ecf5220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88801ecf5220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff88807818b220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff88807818b220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #4: ffff8880422541a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff8880422541a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #5: ffff88806c3bc0d0 (&d->usb_mutex){+.+.}-{3:3}, at: rtl28xxu_ctrl_msg+0x57/0x650 drivers/media/usb/dvb-usb-v2/rtl28xxu.c:24
6 locks held by kworker/1:10/3907:
 #0: ffff888016d88d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
 #1: ffffc900042bfd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
 #2: ffff88801f19d220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88801f19d220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff8880418d0220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff8880418d0220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #4: ffff8880418d11a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff8880418d11a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #5: ffffffff8cfeee28 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
3 locks held by kworker/u4:14/4226:
 #0: ffff8880b9a39698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
 #1: ffff8880b9a27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x53d/0x810 kernel/sched/psi.c:891
 #2: ffff88807ea90d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1033 [inline]
 #2: ffff88807ea90d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa0/0x1480 net/mac80211/ibss.c:1685

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4040 Comm: kworker/0:10 Not tainted 5.15.104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:chacha_permute+0x4dd/0x1050 lib/crypto/chacha.c:62
Code: 41 c1 c7 07 44 89 74 24 48 44 89 e0 44 01 f0 89 44 24 54 31 c3 c1 c3 07 89 f0 41 89 fc 01 f8 89 44 24 20 41 31 c3 41 c1 c3 07 <44> 89 5c 24 0c 8b 84 24 84 00 00 00 3b 84 24 b4 00 00 00 7d 30 e8
RSP: 0018:ffffc900038ef648 EFLAGS: 00000086
RAX: 0000000080744040 RBX: 00000000fa1f6809 RCX: 0000000060a9c52e
RDX: 00000000ae9376cb RSI: 00000000aa1abfd6 RDI: 00000000d659806a
RBP: 00000000c78e9a7e R08: 00000000959e8333 R09: 0000000023aa0df2
R10: 00000000cacd59e2 R11: 000000009b80e074 R12: 00000000d659806a
R13: 00000000d85f192f R14: 000000005f3b432a R15: 00000000629d5d62
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c014c35000 CR3: 0000000045b4e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 chacha_block_generic+0x9b/0x1340 lib/crypto/chacha.c:83
 chacha20_block include/crypto/chacha.h:36 [inline]
 crng_fast_key_erasure drivers/char/random.c:296 [inline]
 crng_make_state+0x30e/0x690 drivers/char/random.c:391
 _get_random_bytes+0xd3/0x2b0 drivers/char/random.c:405
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:694 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:724 [inline]
 nsim_dev_trap_report_work+0x64e/0xab0 drivers/net/netdevsim/dev.c:765
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>