INFO: task kworker/u4:5:25429 blocked for more than 143 seconds.
      Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5    state:D stack:23104 pid:25429 ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x9d1/0xe40 kernel/sched/core.c:6555
 schedule+0xcb/0x190 kernel/sched/core.c:6631
 rxrpc_destroy_all_calls+0x585/0x680 net/rxrpc/call_object.c:733
 rxrpc_exit_net+0x6a/0xc0 net/rxrpc/net_ns.c:125
 ops_exit_list net/core/net_namespace.c:169 [inline]
 cleanup_net+0x758/0xc60 net/core/net_namespace.c:606
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d523910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d524110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
 #0: ffffffff8d523740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4740:
 #0: ffff88814a2f3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
3 locks held by kworker/0:12/24505:
 #0: ffff888144a86938 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
 #1: ffffc9001681fd00 ((work_completion)(&hcd->wakeup_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
 #2: ffff888147129190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline]
 #2: ffff888147129190 (&dev->mutex){....}-{3:3}, at: usb_remote_wakeup+0x1f/0xe0 drivers/usb/core/hub.c:3779
3 locks held by kworker/u4:5/25429:
 #0: ffff8880129db138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
 #1: ffffc9000b0cfd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
 #2: ffffffff8e657d10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc60 net/core/net_namespace.c:568
2 locks held by syz-executor.0/27525:
 #0: ffffffff8e080c48 (wdm_mutex){+.+.}-{3:3}, at: wdm_release+0x4e/0x450 drivers/usb/class/cdc-wdm.c:764
 #1: ffff88814712c4f8 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3145 [inline]
 #1: ffff88814712c4f8 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_port_resume+0x28a/0x1070 drivers/usb/core/hub.c:3703

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x19b/0x3e0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xcd5/0xd20 kernel/hung_task.c:377
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27554 Comm: kworker/u4:19 Not tainted 6.1.0-syzkaller-13872-gb6bb9676f216 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lockdep_hardirqs_on_prepare+0x12d/0x7b0 kernel/locking/lockdep.c:4308
Code: 00 00 9c 8f 44 24 40 80 3c 13 00 74 12 4c 89 f7 e8 48 18 78 00 48 ba 00 00 00 00 00 fc ff df f6 44 24 41 02 0f 85 95 03 00 00 <48> c7 c0 80 70 16 92 48 c1 e8 03 8a 04 10 84 c0 0f 85 86 05 00 00
RSP: 0018:ffffc9000391f760 EFLAGS: 00000046
RAX: 1ffffffff242ce04 RBX: 1ffff92000723ef4 RCX: ffffffff92167003
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff813351f4
RBP: ffffc9000391f808 R08: ffffffff8442131b R09: ffffed100250d0b7
R10: ffffed100250d0b7 R11: 1ffff1100250d0b6 R12: ffff888012867558
R13: dffffc0000000000 R14: ffffc9000391f7a0 R15: 1ffff92000723ef0
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2259821b8 CR3: 000000000d28e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 __text_poke+0x7c4/0x9d0 arch/x86/kernel/alternative.c:1646
 text_poke arch/x86/kernel/alternative.c:1671 [inline]
 text_poke_bp_batch+0x64c/0x850 arch/x86/kernel/alternative.c:2027
 text_poke_flush arch/x86/kernel/alternative.c:2131 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:2138
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xc8/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x16/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:804
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>