======================================
| xx__-> [    8.517273][  T130] ------------[ cut here ]------------
| [    8.517488][  T130] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: tc/130
| [    8.517730][  T130] Modules linked in:
| [    8.518222][  T130] Tainted: [W]=WARN
[    8.518326][  T130] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.518552][  T130] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.518724][  T130] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 c8 c5 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c604
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c5da
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.519225][  T130] RSP: 0018:ffa0000000767aa8 EFLAGS: 00010286
[    8.519394][  T130] RAX: 00000000ffffffa6 RBX: ff1100000b66f6c0 RCX: 1ff40000000ecf1b
[    8.519587][  T130] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b66f770
[    8.519779][  T130] RBP: ff11000007d59000 R08: 1fe22000016cdeef R09: ff1100000c79d180
[    8.519981][  T130] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.520175][  T130] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000007d59000
[    8.520372][  T130] FS:  00007f50823f4c00(0000) GS:ff11000079fbb000(0000) knlGS:0000000000000000
[    8.520598][  T130] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.520766][  T130] CR2: 00007f50824eebc0 CR3: 000000000ca43002 CR4: 0000000000771ef0
[    8.520967][  T130] PKRU: 55555554
[    8.521064][  T130] Call Trace:
[    8.521161][  T130]  <TASK>
[    8.521228][  T130]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.521364][  T130]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.521493][  T130]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.521630][  T130]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.521728][  T130]  register_netdevice (net/core/dev.c:11488)
[    8.521860][  T130]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.522028][  T130]  register_netdev (net/core/dev.c:11552)
[    8.522156][  T130]  loopback_net_init (drivers/net/loopback.c:218)
[    8.522288][  T130]  ops_init (net/core/net_namespace.c:137)
[    8.522389][  T130]  setup_net (net/core/net_namespace.c:446)
[    8.522494][  T130]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.522621][  T130]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.522752][  T130]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.522888][  T130]  copy_net_ns (net/core/net_namespace.c:579)
[    8.523018][  T130]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.523148][  T130]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.523302][  T130]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    8.523444][  T130]  ksys_unshare (kernel/fork.c:3243)
[    8.523573][  T130]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.523704][  T130]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.523830][  T130]  ? exc_page_fault (arch/x86/mm/fault.c:1474 arch/x86/mm/fault.c:1527)
[    8.523967][  T130]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.524096][  T130]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.524251][  T130]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.524383][  T130]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.524509][  T130]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.524638][  T130]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.524767][  T130]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.524931][  T130] RIP: 0033:0x7f50824eebcb
[    8.525068][  T130] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    8.525540][  T130] RSP: 002b:00007ffcc64c0c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[    8.525735][  T130] RAX: ffffffffffffffda RBX: 00000f6a1013a000 RCX: 00007f50824eebcb
[    8.525932][  T130] RDX: 0000000000000028 RSI: 00000000000000f3 RDI: 0000000040000000
[    8.526128][  T130] RBP: 00007b50809d0000 R08: 00007f508255af00 R09: 00000000000000f3
[    8.526335][  T130] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f508200d000
[    8.526529][  T130] R13: 00007b50806d01c0 R14: 00007b50809d02c0 R15: 00007f508200d000
| [    8.602029][   T12] ------------[ cut here ]------------
| [    8.602220][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [    8.602469][   T12] Modules linked in: sch_fq_codel
| [    8.602916][   T12] Tainted: [W]=WARN
[    8.603007][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.603204][   T12] Workqueue: netns cleanup_net
[    8.603349][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.603506][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 c8 c5 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c604
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c5da
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.603941][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[    8.604169][   T12] RAX: 00000000ffffffa6 RBX: ff1100000b66eac0 RCX: 1ff4000000018ed5
[    8.604349][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b66eb70
[    8.604600][   T12] RBP: ff11000007d59000 R08: 1fe22000016cdd6f R09: ff11000001b051d0
[    8.604852][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.605102][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[    8.605424][   T12] FS:  0000000000000000(0000) GS:ff11000079fbb000(0000) knlGS:0000000000000000
[    8.605632][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.605826][   T12] CR2: 00000000009fd000 CR3: 000000000e087005 CR4: 0000000000771ef0
[    8.607063][   T12] PKRU: 55555554
[    8.607156][   T12] Call Trace:
[    8.607246][   T12]  <TASK>
[    8.607310][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[    8.607470][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[    8.607618][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[    8.607747][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[    8.607955][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[    8.608073][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[    8.608192][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[    8.608310][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[    8.608433][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[    8.608552][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[    8.608675][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[    8.608797][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.609012][   T12]  cleanup_net (net/core/net_namespace.c:702)
[    8.609133][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[    8.609252][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[    8.609377][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[    8.609495][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.609616][   T12]  process_one_work (kernel/workqueue.c:3314)
[    8.609743][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[    8.609954][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.610081][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[    8.610204][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[    8.610321][   T12]  kthread (kernel/kthread.c:436)
[    8.610415][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    8.610563][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[    8.610683][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[    8.610806][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[    8.611046][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[    8.611237][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[    8.611359][   T12]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [    8.627122][  T133] ------------[ cut here ]------------
| [    8.627283][  T133] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: tc/133
| [    8.627522][  T133] Modules linked in: sch_fq_codel
| [    8.627960][  T133] Tainted: [W]=WARN
[    8.628061][  T133] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.628223][  T133] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.628400][  T133] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 c8 c5 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c604
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c5da
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.628875][  T133] RSP: 0018:ffa0000000627aa8 EFLAGS: 00010286
[    8.629041][  T133] RAX: 00000000ffffffa6 RBX: ff110000092b2ac0 RCX: 1ff40000000c4f1b
[    8.629234][  T133] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000092b2b70
[    8.629432][  T133] RBP: ff11000007639000 R08: 1fe220000125656f R09: ff1100000c315180
[    8.629627][  T133] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    8.629825][  T133] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000007639000
[    8.630151][  T133] FS:  00007f50823f4c00(0000) GS:ff1100007a13b000(0000) knlGS:0000000000000000
[    8.630386][  T133] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.630552][  T133] CR2: 00007f50824eebc0 CR3: 000000000c4bd003 CR4: 0000000000771ef0
[    8.630750][  T133] PKRU: 55555554
[    8.630850][  T133] Call Trace:
[    8.630953][  T133]  <TASK>
[    8.631020][  T133]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.631151][  T133]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.631281][  T133]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.631419][  T133]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.631517][  T133]  register_netdevice (net/core/dev.c:11488)
[    8.631654][  T133]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.631820][  T133]  register_netdev (net/core/dev.c:11552)
[    8.631954][  T133]  loopback_net_init (drivers/net/loopback.c:218)
[    8.632086][  T133]  ops_init (net/core/net_namespace.c:137)
[    8.632186][  T133]  setup_net (net/core/net_namespace.c:446)
[    8.632283][  T133]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.632416][  T133]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.632550][  T133]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.632682][  T133]  copy_net_ns (net/core/net_namespace.c:579)
[    8.632812][  T133]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.632950][  T133]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.633081][  T133]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    8.633211][  T133]  ksys_unshare (kernel/fork.c:3243)
[    8.633347][  T133]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.633481][  T133]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.633611][  T133]  ? exc_page_fault (arch/x86/mm/fault.c:1474 arch/x86/mm/fault.c:1527)
[    8.633746][  T133]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.633882][  T133]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.634011][  T133]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.634140][  T133]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.634269][  T133]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.634402][  T133]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.634537][  T133]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.634697][  T133] RIP: 0033:0x7f50824eebcb
[    8.634833][  T133] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    8.635300][  T133] RSP: 002b:00007ffcc64c0c08 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[    8.635503][  T133] RAX: ffffffffffffffda RBX: 00000f6a1013a000 RCX: 00007f50824eebcb
[    8.635696][  T133] RDX: 0000000000000028 RSI: 00000000000000f3 RDI: 0000000040000000
[    8.635893][  T133] RBP: 00007b50809d0000 R08: 00007f508255af00 R09: 00000000000000f3
[    8.636086][  T133] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f508200c000
[    8.636285][  T133] R13: 00007b50807d0040 R14: 00007b50809d02c0 R15: 00007ffcc64c0f90
| [    8.802181][   T12] ------------[ cut here ]------------
| [    8.802362][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: 0/12
| [    8.802616][   T12] Modules linked in: act_vlan cls_flower sch_ingress sch_fq_codel
| [    8.803742][   T12] Tainted: [W]=WARN
[    8.803911][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.804066][   T12] Workqueue: netns cleanup_net
[    8.804195][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.804359][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 c8 c5 f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c604
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 c8 c5 f0 ff       	call   0xfffffffffff0c5da
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.804788][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[    8.805854][   T12] RAX: 00000000ffffffa6 RBX: ff110000090e2dc0 RCX: 1ff4000000018ed5
[    8.806130][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000090e2e70
[    8.806309][   T12] RBP: ff11000007639000 R08: 1fe220000121c5cf R09: ff11000001b051d0
[    8.806494][   T12] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    8.806671][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[    8.806855][   T12] FS:  0000000000000000(0000) GS:ff1100007a13b000(0000) knlGS:0000000000000000
[    8.807163][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.807313][   T12] CR2: 00007ffcc64c12d8 CR3: 000000000bc9e002 CR4: 0000000000771ef0
[    8.807499][   T12] PKRU: 55555554
[    8.807591][   T12] Call Trace:
[    8.807688][   T12]  <TASK>
[    8.807751][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[    8.807996][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[    8.808151][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[    8.808273][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[    8.808397][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[    8.808515][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[    8.808636][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[    8.808756][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[    8.808963][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[    8.809082][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[    8.809203][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[    8.809321][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.809452][   T12]  cleanup_net (net/core/net_namespace.c:702)
[    8.809571][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[    8.809691][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[    8.809811][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[    8.810022][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.810144][   T12]  process_one_work (kernel/workqueue.c:3314)
[    8.810266][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[    8.810389][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.810513][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[    8.810636][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[    8.810754][   T12]  kthread (kernel/kthread.c:436)
[    8.810843][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    8.811084][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[    8.811203][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[    8.811329][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[    8.811477][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[    8.811597][   T12]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:register_netdev:loopback_net_init
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net