======================================
| [  929.512067][    C0] bond_xfrm_update_stats: eth0 doesn't support xdo_dev_state_update_stats
| [  931.265121][  T689] ------------[ cut here ]------------
| [  931.265430][  T689] WARNING: drivers/net/netdevsim/netdev.c:1234 at nsim_destroy+0x128/0x780 [netdevsim], CPU#2: 2/689
| [  931.265817][  T689] Modules linked in: xfrm_user netconsole netdevsim cls_matchall 8021q
[  931.267148][  T689] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  931.267469][  T689] Workqueue: netns cleanup_net
[  931.267683][  T689] RIP: 0010:nsim_destroy (drivers/net/netdevsim/netdev.c:1234 (discriminator 2)) netdevsim
[  931.267922][  T689] Code: 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 0f 85 dd 05 00 00 48 8b 3b e8 b4 7f 35 c9 31 c0 48 8d ab 48 07 00 00 eb 07 90 <0f> 0b 90 83 c0 01 0f b7 d0 be 00 10 00 00 48 89 ef e8 52 c3 6f c8
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	00 fc                	add    %bh,%ah
   6:	ff                   	lcall  (bad)
   7:	df 48 c1             	fisttps -0x3f(%rax)
   a:	e9 03 80 3c 01       	jmp    0x13c8012
   f:	00 0f                	add    %cl,(%rdi)
  11:	85 dd                	test   %ebx,%ebp
  13:	05 00 00 48 8b       	add    $0x8b480000,%eax
  18:	3b e8                	cmp    %eax,%ebp
  1a:	b4 7f                	mov    $0x7f,%ah
  1c:	35 c9 31 c0 48       	xor    $0x48c031c9,%eax
  21:	8d ab 48 07 00 00    	lea    0x748(%rbx),%ebp
  27:	eb 07                	jmp    0x30
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	83 c0 01             	add    $0x1,%eax
  30:	0f b7 d0             	movzwl %ax,%edx
  33:	be 00 10 00 00       	mov    $0x1000,%esi
  38:	48 89 ef             	mov    %rbp,%rdi
  3b:	e8 52 c3 6f c8       	call   0xffffffffc86fc392

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	83 c0 01             	add    $0x1,%eax
   6:	0f b7 d0             	movzwl %ax,%edx
   9:	be 00 10 00 00       	mov    $0x1000,%esi
   e:	48 89 ef             	mov    %rbp,%rdi
  11:	e8 52 c3 6f c8       	call   0xffffffffc86fc368
[  931.268523][  T689] RSP: 0018:ffa0000001547830 EFLAGS: 00010293
[  931.268751][  T689] RAX: 0000000000000000 RBX: ff11000012a82d00 RCX: ff11000012a83448
[  931.269036][  T689] RDX: 0000000000000000 RSI: 0000000000000000 RDI: dffffc0000000000
[  931.269312][  T689] RBP: ff11000012a83448 R08: ff11000012a83448 R09: 0000000000000000
[  931.269582][  T689] R10: 1fe2200002550689 R11: 0000000000000001 R12: ff1100000ce8ec98
[  931.269848][  T689] R13: dffffc0000000000 R14: ff1100000ce8e800 R15: ff1100000ce8e800
[  931.270137][  T689] FS:  0000000000000000(0000) GS:ff110000a911e000(0000) knlGS:0000000000000000
[  931.270436][  T689] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  931.270666][  T689] CR2: 00007f5f0ab77290 CR3: 000000001f53b004 CR4: 0000000000771ef0
[  931.270927][  T689] PKRU: 55555554
[  931.271104][  T689] Call Trace:
[  931.271261][  T689]  <TASK>
[  931.271383][  T689]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1))
[  931.271589][  T689] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:444 drivers/net/netdevsim/dev.c:1529) netdevsim
[  931.271821][  T689]  ? devl_lock_is_held (net/devlink/core.c:285 (discriminator 1))
[  931.272028][  T689] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1538 (discriminator 4) drivers/net/netdevsim/dev.c:1764 (discriminator 4)) netdevsim
[  931.272261][  T689] nsim_dev_reload_down (drivers/net/netdevsim/dev.c:1039) netdevsim
[  931.272493][  T689]  devlink_reload (net/devlink/dev.c:463)
[  931.272685][  T689]  ? xas_find_conflict (lib/xarray.c:218 lib/xarray.c:1568)
[  931.272877][  T689]  ? devlink_notify_unregister (net/devlink/dev.c:446)
[  931.273109][  T689]  ? __devlinks_xa_find_get (./include/linux/rcupdate.h:322 (discriminator 1) ./include/linux/rcupdate.h:881 (discriminator 1) net/devlink/core.c:364 (discriminator 1))
[  931.273366][  T689]  devlink_pernet_pre_exit (net/devlink/core.c:304 net/devlink/devl_internal.h:130 net/devlink/core.c:562)
[  931.273565][  T689]  ? fqdir_free_fn (net/ipv4/inet_fragment.c:222)
[  931.273759][  T689]  ? devlink_free (net/devlink/core.c:545)
[  931.273964][  T689]  ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1729)
[  931.274170][  T689]  ops_undo_list (net/core/net_namespace.c:160 (discriminator 4) net/core/net_namespace.c:234 (discriminator 4))
[  931.274364][  T689]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:223)
[  931.274566][  T689]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  931.274768][  T689]  cleanup_net (net/core/net_namespace.c:706)
[  931.274972][  T689]  ? net_passive_dec (net/core/net_namespace.c:665)
[  931.275169][  T689]  ? process_one_work (kernel/workqueue.c:3251 (discriminator 1))
[  931.275361][  T689]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 33) kernel/locking/lockdep.c:5831 (discriminator 33))
[  931.275554][  T689]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1))
[  931.275751][  T689]  process_one_work (kernel/workqueue.c:3280)
[  931.275960][  T689]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3177)
[  931.276163][  T689]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870)
[  931.276358][  T689]  worker_thread (kernel/workqueue.c:3352 (discriminator 2) kernel/workqueue.c:3439 (discriminator 2))
[  931.276556][  T689]  ? rescuer_thread (kernel/workqueue.c:3385)
[  931.276746][  T689]  kthread (kernel/kthread.c:436)
[  931.276902][  T689]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 33))
[  931.277149][  T689]  ? kthread_affine_node (kernel/kthread.c:381)
[  931.277341][  T689]  ret_from_fork (arch/x86/kernel/process.c:164)
[  931.277541][  T689]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  931.277770][  T689]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 arch/x86/kernel/process_64.c:377 arch/x86/kernel/process_64.c:665)
[  931.277969][  T689]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
nsim_destroy:__nsim_dev_port_del:nsim_dev_reload_destroy:nsim_dev_reload_down:devlink_reload