INFO: task kworker/0:9:3730 blocked for more than 143 seconds.
      Not tainted 5.15.120-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9     state:D stack:22080 pid: 3730 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_timeout+0xac/0x300 kernel/time/timer.c:1860
 do_wait_for_common+0x2d9/0x480 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+0x48/0x60 kernel/sched/completion.c:138
 cleanup_rng drivers/char/hw_random/core.c:82 [inline]
 kref_put include/linux/kref.h:65 [inline]
 drop_current_rng+0x8b/0xf0 drivers/char/hw_random/core.c:110
 set_current_rng+0x3ad/0x530 drivers/char/hw_random/core.c:97
 hwrng_register+0x34a/0x4c0 drivers/char/hw_random/core.c:500
 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/26:
 #0: ffffffff8c91e6a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:2/154:
 #0: ffff8880b9a396d8 (&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+0x4e1/0x810 kernel/sched/psi.c:882
1 lock held by hwrng/902:
 #0: ffffffff8cff66a8 (rng_mutex){+.+.}-{3:3}, at: get_current_rng drivers/char/hw_random/core.c:127 [inline]
 #0: ffffffff8cff66a8 (rng_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0x36/0x280 drivers/char/hw_random/core.c:433
2 locks held by getty/3261:
 #0: ffff88814b1a4098 (&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
6 locks held by kworker/0:9/3730:
 #0: ffff888016a07938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280
 #1: ffffc9000397fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282
 #2: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff88807325c220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff88807325c220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:954
 #4: ffff88807325b1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff88807325b1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:954
 #5: ffffffff8cff66a8 (rng_mutex){+.+.}-{3:3}, at: hwrng_register+0xa9/0x4c0 drivers/char/hw_random/core.c:473
4 locks held by udevd/8563:
 #0: ffff8880788b60a0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xae/0xd10 fs/seq_file.c:182
 #1: ffff888047b86088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x50/0x3b0 fs/kernfs/file.c:112
 #2: ffff888075a87918 (kn->active#90){++++}-{0:0}, at: kernfs_seq_start+0x6f/0x3b0 fs/kernfs/file.c:113
 #3: ffff88807325c220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline]
 #3: ffff88807325c220 (&dev->mutex){....}-{3:3}, at: product_show+0x22/0x90 drivers/usb/core/sysfs.c:140
1 lock held by syz-executor.1/9417:
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x152/0x7a0 drivers/usb/core/devio.c:1038
1 lock held by syz-executor.1/9547:
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x152/0x7a0 drivers/usb/core/devio.c:1038
1 lock held by syz-executor.1/9608:
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #0: ffff88801e910220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x152/0x7a0 drivers/usb/core/devio.c:1038

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

NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
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: 2951 Comm: klogd Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:qlist_free_all+0x2e/0x90 mm/kasan/quarantine.c:176
Code: 41 55 41 54 53 4c 8b 2f 4d 85 ed 74 6e 49 89 f7 49 89 fe 49 bc 00 00 00 00 00 ea ff ff eb 1b 48 ff c9 48 8b 71 18 49 8b 5d 00 <4c> 89 ef e8 3a 04 00 00 49 89 dd 48 85 db 74 2a 4c 89 fe 4d 85 ff
RSP: 0018:ffffc9000297f540 EFLAGS: 00000286
RAX: ffffea00006b3f00 RBX: ffff88802a94a000 RCX: ffffea00006b3f00
RDX: 0000000000000000 RSI: ffff888144baa140 RDI: 0000000000000000
RBP: ffff88801dd54b40 R08: ffffffff81395b08 R09: fffffbfff1bc7e0e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0000000000
R13: ffff88801acfc000 R14: ffffc9000297f570 R15: 0000000000000000
FS:  00007f9bf9ca2380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005646ebbcc680 CR3: 000000002355a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256
 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415
 alloc_skb include/linux/skbuff.h:1167 [inline]
 alloc_skb_with_frags+0xa3/0x780 net/core/skbuff.c:6121
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2497
 unix_dgram_sendmsg+0x6fd/0x2090 net/unix/af_unix.c:1812
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 __sys_sendto+0x564/0x720 net/socket.c:2039
 __do_sys_sendto net/socket.c:2051 [inline]
 __se_sys_sendto net/socket.c:2047 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2047
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9bf9e049b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc4cbcb7d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f9bf9e049b5
RDX: 0000000000000049 RSI: 000055675054db60 RDI: 0000000000000003
RBP: 0000556750546910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f9bf9f92212 R14: 00007ffc4cbcb8d8 R15: 0000000000000000
 </TASK>