INFO: task kworker/1:9:29334 blocked for more than 143 seconds.
      Not tainted 5.15.115-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:9     state:D stack:22008 pid:29334 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
 __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+0x1a2/0x3d0 drivers/base/dd.c:755
 driver_probe_device+0x50/0x420 drivers/base/dd.c:785
 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:979
 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+0x1a2/0x3d0 drivers/base/dd.c:755
 driver_probe_device+0x50/0x420 drivers/base/dd.c:785
 __device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:979
 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:2307
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454
 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: ffffffff8c91c5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/902:
 #0: ffffffff8cff40c8 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xdd/0x280 drivers/char/hw_random/core.c:436
2 locks held by getty/3269:
 #0: ffff88814adec098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900020a32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
4 locks held by kworker/u4:13/7416:
2 locks held by kworker/1:4/825:
 #0: ffff888011c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000698fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
4 locks held by udevd/11352:
 #0: ffff8880931d61c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xae/0xd10 fs/seq_file.c:182
 #1: ffff88801b43a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x50/0x3b0 fs/kernfs/file.c:112
 #2: ffff8880a7673008 (kn->active#86){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x3b0 fs/kernfs/file.c:113
 #3: ffff8880b0adb220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline]
 #3: ffff8880b0adb220 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x22/0x90 drivers/usb/core/sysfs.c:141
6 locks held by kworker/1:9/29334:
 #0: ffff8881421b6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000af27d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffff888147b29220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff888147b29220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff8880b0adb220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff8880b0adb220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:954
 #4: ffff8880957e61a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff8880957e61a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:954
 #5: ffffffff8cff40c8 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
6 locks held by kworker/1:19/29343:
 #0: ffff8881421b6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000afa7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffff88801e82e220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88801e82e220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff88801ede95c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3091 [inline]
 #3: ffff88801ede95c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5254 [inline]
 #3: ffff88801ede95c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 #3: ffff88801ede95c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline]
 #3: ffff88801ede95c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x30b9/0x56d0 drivers/usb/core/hub.c:5730
 #4: ffff88801e247f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5255 [inline]
 #4: ffff88801e247f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 #4: ffff88801e247f68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline]
 #4: ffff88801e247f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x30eb/0x56d0 drivers/usb/core/hub.c:5730
 #5: ffffffff8d380130 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x20a/0x21f0 drivers/usb/core/hub.c:2953
4 locks held by syz-executor.5/5454:
 #0: ffff88801f9f3158 (&mousedev->mutex/1){+.+.}-{3:3}, at: mixdev_close_devices+0x2e/0x240 drivers/input/mousedev.c:486
 #1: ffff88801fd49158 (&mousedev->mutex#2){+.+.}-{3:3}, at: mousedev_close_device drivers/input/mousedev.c:441 [inline]
 #1: ffff88801fd49158 (&mousedev->mutex#2){+.+.}-{3:3}, at: mixdev_close_devices+0xc9/0x240 drivers/input/mousedev.c:494
 #2: ffff88801fc542c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_close_device+0x47/0x1d0 drivers/input/input.c:690
 #3: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #3: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:842
1 lock held by syz-executor.1/5482:
 #0: ffff8881475c8468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa9/0xbe0 drivers/block/loop.c:1365

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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: 5491 Comm: syz-executor.2 Not tainted 5.15.115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:mark_lock+0x107/0x340 kernel/locking/lockdep.c:4609
Code: 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 90 78 66 00 41 bc 01 00 00 00 44 85 33 74 53 44 89 e0 48 83 c4 10 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 e8 9e 1e a0 02 85 c0 74 be 48 c7 c0 08 f1 e3 8d
RSP: 0000:ffffc9000c717760 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffff88801f2a0b40 RCX: ffffffff8162db08
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbc9110
RBP: 0000000000000006 R08: dffffc0000000000 R09: fffffbfff1f79223
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801f2a0b60
R13: 0000000000000002 R14: 0000000000000040 R15: ffff88801f2a0b40
FS:  0000555555ad3400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65f1e17140 CR3: 00000000a926d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 mark_held_locks kernel/locking/lockdep.c:4192 [inline]
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4218 [inline]
 lockdep_hardirqs_on_prepare+0x3a0/0x7a0 kernel/locking/lockdep.c:4277
 trace_hardirqs_on+0x67/0x80 kernel/trace/trace_preemptirq.c:49
 lock_page_memcg+0x264/0x4d0 mm/memcontrol.c:2056
 page_add_file_rmap+0x18c/0x980 mm/rmap.c:1219
 do_set_pte+0x45b/0x660 mm/memory.c:4026
 filemap_map_pages+0xf0c/0x1560 mm/filemap.c:3335
 do_fault_around mm/memory.c:4200 [inline]
 do_read_fault mm/memory.c:4215 [inline]
 do_fault mm/memory.c:4349 [inline]
 handle_pte_fault mm/memory.c:4608 [inline]
 __handle_mm_fault mm/memory.c:4743 [inline]
 handle_mm_fault+0x341b/0x5950 mm/memory.c:4841
 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7f65f1e17140
Code: 08 31 c0 4c 89 07 c3 0f 1f 00 48 c7 c0 b8 ff ff ff 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 <49> 89 f0 85 c9 48 8d 35 34 c7 06 00 48 8d 05 ed c6 06 00 48 0f 44
RSP: 002b:00007ffe3a7ac0b8 EFLAGS: 00010216
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000000a RSI: 00007ffe3a7ac5d8 RDI: 0000000000000002
RBP: 00007ffe3a7ac610 R08: 00000000ffffffff R09: 0000000000000016
R10: 0000000000000000 R11: 0000000000000000 R12: 00007ffe3a7ac630
R13: 00007f65f1e5cbc3 R14: 00007ffe3a7ac7b0 R15: 0000000000000075
 </TASK>