------------[ cut here ]------------
WARNING: CPU: 0 PID: 33 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90
Modules linked in:
CPU: 0 PID: 33 Comm: kworker/u4:2 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441
Code: 8b 3c 24 e8 f6 7c 88 00 e9 d9 fc ff ff e8 dc f3 30 00 89 ee 48 c7 c7 c0 98 1d 8d e8 de ce 15 03 e9 1e fc ff ff e8 c4 f3 30 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ae f3 30 00
RSP: 0018:ffffc90000007bb8 EFLAGS: 00010046
RAX: ffffffff8159a82c RBX: 00000000000b0012 RCX: ffff88801b681dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff815a95d5 R09: fffffbfff1d35ef6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff888074ad9000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7b5c8cd440 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1544 [inline]
 __run_timers+0x6a8/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 do_softirq+0x162/0x240 kernel/softirq.c:472
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1b1/0x1f0 kernel/softirq.c:396
 pneigh_ifdown_and_unlock net/core/neighbour.c:865 [inline]
 __neigh_ifdown+0x1c6/0x3f0 net/core/neighbour.c:447
 neigh_ifdown+0x1b/0x30 net/core/neighbour.c:464
 rt6_disable_ip+0x82e/0x890 net/ipv6/route.c:4909
 addrconf_ifdown+0x154/0x1b90 net/ipv6/addrconf.c:3782
 addrconf_notify+0x3ec/0xf60
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
 call_netdevice_notifiers net/core/dev.c:2022 [inline]
 dev_close_many+0x37c/0x530 net/core/dev.c:1570
 unregister_netdevice_many+0x4f7/0x17a0 net/core/dev.c:10864
 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10821
 unregister_netdevice include/linux/netdevice.h:3045 [inline]
 nsim_destroy+0x44/0x140 drivers/net/netdevsim/netdev.c:382
 __nsim_dev_port_del+0x153/0x1b0 drivers/net/netdevsim/dev.c:1433
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1445 [inline]
 nsim_dev_reload_destroy+0x286/0x490 drivers/net/netdevsim/dev.c:1662
 nsim_dev_reload_down+0x94/0xc0 drivers/net/netdevsim/dev.c:968
 devlink_reload+0x1eb/0x6a0 net/devlink/leftover.c:4472
 devlink_pernet_pre_exit+0x150/0x2f0 net/devlink/leftover.c:12501
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x59c/0xb60 net/core/net_namespace.c:592
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>