INFO: task kworker/0:7:3703 blocked for more than 144 seconds.
      Not tainted 5.15.103-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7     state:D stack:22104 pid: 3703 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5023 [inline]
 __schedule+0x1348/0x4610 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+0x90d/0x1270 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: ffffffff8c91c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/900:
 #0: ffffffff8cff3568 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xdd/0x280 drivers/char/hw_random/core.c:436
2 locks held by getty/3269:
 #0: ffff88802441a098 (&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/0:7/3703:
 #0: ffff888141f8cd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279
 #1: ffffc9000330fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281
 #2: ffff888147d6c220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff888147d6c220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676
 #3: ffff88804bf0a220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff88804bf0a220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #4: ffff88801a2a11a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff88801a2a11a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:949
 #5: ffffffff8cff3568 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x1d/0x140 drivers/char/hw_random/core.c:70
4 locks held by kworker/u4:18/19348:
 #0: ffff888011db5138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x794/0x1270 kernel/workqueue.c:2279
 #1: ffffc900049c7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7da/0x1270 kernel/workqueue.c:2281
 #2: ffffffff8d9cd310 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:558
 #3: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0xa4f/0xc40 net/core/dev.c:10627
2 locks held by syz-executor.5/24654:
 #0: ffffffff8d9cd310 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline]
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x176/0x3b0 net/smc/smc_pnet.c:868
2 locks held by syz-executor.2/24644:
 #0: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5584
 #1: ffffffff8c920770 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x4e0 kernel/rcu/tree.c:3994
2 locks held by syz-executor.0/24659:
 #0: ffffffff8d9cd310 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline]
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x176/0x3b0 net/smc/smc_pnet.c:868
2 locks held by syz-executor.1/24673:
 #0: ffffffff8d9cd310 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x37b/0x5d0 net/core/net_namespace.c:469
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:799 [inline]
 #1: ffffffff8d9d9068 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x176/0x3b0 net/smc/smc_pnet.c:868

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.103-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+0xf54/0xfa0 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: 14 Comm: ksoftirqd/0 Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:preempt_count_add+0x30/0x180 kernel/sched/core.c:5478
Code: fb 48 c7 c0 a0 af 3a 91 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 e2 00 00 00 83 3d b0 3d e3 0f 00 <75> 07 65 8b 05 cf fd aa 7e 65 01 1d c8 fd aa 7e 48 c7 c0 a0 af 3a
RSP: 0018:ffffc90000d37508 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff913aaf03
RDX: dffffc0000000000 RSI: ffffffff815676cb RDI: 0000000000000001
RBP: ffffc90000d37618 R08: 0000000000000008 R09: ffffc90000d376d0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d37e70
R13: ffffffff816e1d00 R14: ffffffff815676cb R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00ff44000 CR3: 0000000023196000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unwind_next_frame+0xbb/0x1fa0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x260 mm/slub.c:3515
 rcu_do_batch kernel/rcu/tree.c:2509 [inline]
 rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2749
 __do_softirq+0x3da/0xa10 kernel/softirq.c:558
 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:920
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>