======================================
| xx__-> [    9.150767][  T174] ------------[ cut here ]------------
| [    9.150972][  T174] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: ip/174
| [    9.151256][  T174] Modules linked in:
| [    9.151658][  T174] Tainted: [W]=WARN
[    9.151759][  T174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.151924][  T174] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.152106][  T174] 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 88 e9 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 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  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 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.152585][  T174] RSP: 0018:ffa00000007f7ab0 EFLAGS: 00010286
[    9.152751][  T174] RAX: 00000000ffffffa6 RBX: ff1100000b00a3c0 RCX: 1ff40000000fef1c
[    9.152949][  T174] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000b00a47c
[    9.153192][  T174] RBP: ff110000059d4000 R08: 1fe2200001601491 R09: ff1100000c99aed0
[    9.153398][  T174] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    9.153598][  T174] R13: 0000000000000000 R14: 0000000000000000 R15: ff110000059d4000
[    9.153798][  T174] FS:  00007f9095096840(0000) GS:ff1100009152c000(0000) knlGS:0000000000000000
[    9.154034][  T174] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.154214][  T174] CR2: 0000000000479648 CR3: 000000000b1c0002 CR4: 0000000000771ef0
[    9.154415][  T174] PKRU: 55555554
[    9.154514][  T174] Call Trace:
[    9.154615][  T174]  <TASK>
[    9.154685][  T174]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.154821][  T174]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.154958][  T174]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.155066][  T174]  register_netdevice (net/core/dev.c:11488)
[    9.155199][  T174]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.155375][  T174]  register_netdev (net/core/dev.c:11552)
[    9.155510][  T174]  loopback_net_init (drivers/net/loopback.c:218)
[    9.155646][  T174]  ops_init (net/core/net_namespace.c:137)
[    9.155750][  T174]  setup_net (net/core/net_namespace.c:446)
[    9.155849][  T174]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.155980][  T174]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.156119][  T174]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.156460][  T174]  copy_net_ns (net/core/net_namespace.c:579)
[    9.156593][  T174]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.156726][  T174]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.156857][  T174]  ksys_unshare (kernel/fork.c:3243)
[    9.156999][  T174]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.157135][  T174]  ? __ia32_sys_open (fs/open.c:1374)
[    9.157275][  T174]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.157405][  T174]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.157538][  T174]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.157668][  T174]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.157800][  T174]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.157931][  T174]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.158126][  T174] RIP: 0033:0x7f9095358bcb
[    9.158272][  T174] 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
[    9.158738][  T174] RSP: 002b:00007ffccc1ee628 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[    9.158938][  T174] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f9095358bcb
[    9.159138][  T174] RDX: 0000000000000000 RSI: 0000000000477309 RDI: 0000000040000000
[    9.159337][  T174] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[    9.159532][  T174] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffccc1f0850
[    9.159728][  T174] R13: 0000000000000001 R14: 00007f90950966f8 R15: 00007ffccc1f183a
| [    9.185841][  T175] ------------[ cut here ]------------
| [    9.185990][  T175] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: ip/175
| [    9.186231][  T175] Modules linked in:
| [    9.186617][  T175] Tainted: [W]=WARN
[    9.186716][  T175] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.186878][  T175] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.187047][  T175] 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 88 e9 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 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  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 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.187528][  T175] RSP: 0018:ffa00000007a7030 EFLAGS: 00010286
[    9.187692][  T175] RAX: 00000000ffffffa6 RBX: ff1100000b00b540 RCX: 1ff40000000f4dcc
[    9.187885][  T175] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000b00b5fc
[    9.188090][  T175] RBP: ff110000059d4000 R08: 1fe22000016016c1 R09: ff1100000c99d1e8
[    9.188289][  T175] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
[    9.188483][  T175] R13: 0000000000000000 R14: 0000000000000000 R15: ff110000059d4ce1
[    9.188679][  T175] FS:  00007f58db782840(0000) GS:ff110000913ac000(0000) knlGS:0000000000000000
[    9.188907][  T175] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.189084][  T175] CR2: 00007f58dba521a0 CR3: 000000000c7ef005 CR4: 0000000000771ef0
[    9.189288][  T175] PKRU: 55555554
[    9.189385][  T175] Call Trace:
[    9.189483][  T175]  <TASK>
[    9.189551][  T175]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.189685][  T175]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.189785][  T175]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.189924][  T175]  __dev_notify_flags (net/core/dev.c:9787)
[    9.190059][  T175]  ? netif_change_name (net/core/dev.c:1495)
[    9.190189][  T175]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.190324][  T175]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.190455][  T175]  ? is_bpf_text_address (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/bpf/core.c:749 (discriminator 2))
[    9.190589][  T175]  netif_change_flags (net/core/dev.c:9820)
[    9.190727][  T175]  do_setlink.isra.0 (net/core/rtnetlink.c:3206 (discriminator 1))
[    9.190859][  T175]  ? rtnl_link_get_size (net/core/rtnetlink.c:716)
[    9.190989][  T175]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[    9.191157][  T175]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[    9.191292][  T175]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.191423][  T175]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[    9.191558][  T175]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    9.191692][  T175]  ? __kernel_text_address (kernel/extable.c:79)
[    9.191822][  T175]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.191953][  T175]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.192089][  T175]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    9.192224][  T175]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.192355][  T175]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[    9.192489][  T175]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.192618][  T175]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.192748][  T175]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 22))
[    9.192879][  T175]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:820)
[    9.193008][  T175]  ? __mutex_lock (kernel/locking/mutex.c:798 (discriminator 1) kernel/locking/mutex.c:820 (discriminator 1))
[    9.193142][  T175]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    9.193287][  T175]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[    9.193419][  T175]  ? __rtnl_newlink (net/core/rtnetlink.c:4000)
[    9.193551][  T175]  rtnl_newlink (net/core/rtnetlink.c:4150)
[    9.193682][  T175]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.193813][  T175]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.193942][  T175]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.194082][  T175]  ? mark_usage (kernel/locking/lockdep.c:4674)
[    9.194225][  T175]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.194357][  T175]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.194485][  T175]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.194614][  T175]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.194745][  T175]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.194875][  T175]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    9.195012][  T175]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7061)
[    9.195147][  T175]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.195284][  T175]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    9.195416][  T175]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.195547][  T175]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.195676][  T175]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    9.195808][  T175]  netlink_rcv_skb (net/netlink/af_netlink.c:2551)
[    9.195945][  T175]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    9.196080][  T175]  ? netlink_ack (./include/linux/skbuff.h:2718)
[    9.196219][  T175]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[    9.196350][  T175]  ? netlink_deliver_tap (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[    9.196481][  T175]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[    9.196613][  T175]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[    9.196750][  T175]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.196879][  T175]  ? __lock_acquire (kernel/locking/lockdep.c:453 kernel/locking/lockdep.c:5225)
[    9.197011][  T175]  netlink_sendmsg (net/netlink/af_netlink.c:1895)
[    9.197147][  T175]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[    9.197285][  T175]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    9.197414][  T175]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.197545][  T175]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.197685][  T175]  ____sys_sendmsg (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2698 (discriminator 4))
[    9.197817][  T175]  ? copy_msghdr_from_user (net/socket.c:2635)
[    9.197946][  T175]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5349)
[    9.198198][  T175]  ? move_addr_to_kernel (./include/linux/audit.h:354 (discriminator 1))
[    9.198336][  T175]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    9.198466][  T175]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    9.198603][  T175]  ___sys_sendmsg (net/socket.c:2752)
[    9.198817][  T175]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[    9.198980][  T175]  ? copy_msghdr_from_user (net/socket.c:2603)
[    9.199125][  T175]  __sys_sendmsg (net/socket.c:2784)
[    9.199259][  T175]  ? __sys_sendmsg_sock (net/socket.c:2765)
[    9.199388][  T175]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3156 (discriminator 6))
[    9.199558][  T175]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[    9.199689][  T175]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.199903][  T175]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.200034][  T175]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.200168][  T175]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.200304][  T175]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.200556][  T175] RIP: 0033:0x7f58db9bc08e
[    9.200693][  T175] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[    9.201258][  T175] RSP: 002b:00007ffde73c8c50 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[    9.201455][  T175] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f58db9bc08e
[    9.201749][  T175] RDX: 0000000000000000 RSI: 00007ffde73c8d00 RDI: 0000000000000005
[    9.201941][  T175] RBP: 00007ffde73c8c60 R08: 0000000000000000 R09: 0000000000000000
[    9.202139][  T175] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a10e6fd
[    9.202337][  T175] R13: 000000000049f620 R14: 0000000000000000 R15: 00007ffde73c93d0
| [   14.692874][   T12] ------------[ cut here ]------------
| [   14.693082][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: 0/12
| [   14.693353][   T12] Modules linked in: nf_conntrack_netlink nft_masq nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
| [   14.694047][   T12] Tainted: [W]=WARN
[   14.694150][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.694382][   T12] Workqueue: netns cleanup_net
[   14.694522][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   14.694687][   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 88 e9 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 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  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 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   14.695148][   T12] RSP: 0018:ffa00000000c7748 EFLAGS: 00010286
[   14.695316][   T12] RAX: 00000000ffffffa6 RBX: ff1100000b00a200 RCX: 1ff4000000018eaf
[   14.695504][   T12] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000b00a2bc
[   14.695694][   T12] RBP: ff110000059d4000 R08: 1fe2200001601459 R09: ff11000001afd260
[   14.695887][   T12] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000041
[   14.696083][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: ffa00000000c77e0
[   14.696277][   T12] FS:  0000000000000000(0000) GS:ff1100009152c000(0000) knlGS:0000000000000000
[   14.696500][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.696659][   T12] CR2: 00007f4dd81f3000 CR3: 000000002b539006 CR4: 0000000000771ef0
[   14.696848][   T12] PKRU: 55555554
[   14.696942][   T12] Call Trace:
[   14.697041][   T12]  <TASK>
[   14.697118][   T12]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   14.697254][   T12]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   14.697351][   T12]  netif_close_many (net/core/dev.c:1804)
[   14.697477][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   14.697603][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   14.697728][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   14.697853][   T12]  ? __dev_close_many (net/core/dev.c:1781)
[   14.697980][   T12]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   14.698138][   T12]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[   14.698269][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   14.698427][   T12]  ? mutex_is_locked (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.h:48 kernel/locking/mutex.c:65)
[   14.698552][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   14.698676][   T12]  ? default_device_exit_net (net/core/dev.c:13033 (discriminator 1))
[   14.698803][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   14.698961][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   14.699094][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   14.699223][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   14.699351][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   14.699477][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   14.699602][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   14.699725][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   14.699854][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   14.699981][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   14.700108][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   14.700240][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   14.700366][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   14.700489][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   14.700616][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   14.700740][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   14.700869][   T12]  process_one_work (kernel/workqueue.c:3314)
[   14.700999][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   14.701126][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   14.701260][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   14.701388][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   14.701511][   T12]  kthread (kernel/kthread.c:436)
[   14.701607][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   14.701763][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   14.701895][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   14.702029][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   14.702188][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   14.702319][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   14.702445][   T12]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   14.705417][   T12] ------------[ cut here ]------------
| [   14.705540][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: 0/12
| [   14.705772][   T12] Modules linked in: nf_conntrack_netlink nft_masq nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
| [   14.706348][   T12] Tainted: [W]=WARN
[   14.706438][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.706587][   T12] Workqueue: netns cleanup_net
[   14.706710][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   14.706866][   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 88 e9 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 88 e9 f0 ff       	call   0xfffffffffff0e9c4
  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 88 e9 f0 ff       	call   0xfffffffffff0e99a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   14.707303][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   14.707454][   T12] RAX: 00000000ffffffa6 RBX: ff1100000b8598c0 RCX: 1ff4000000018ed5
[   14.707630][   T12] RDX: 0000000000000007 RSI: 0000000000000000 RDI: ff1100000b85997c
[   14.707807][   T12] RBP: ff110000059d4000 R08: 1fe220000170b331 R09: ff11000001afd260
[   14.707984][   T12] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[   14.708165][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   14.708350][   T12] FS:  0000000000000000(0000) GS:ff1100009152c000(0000) knlGS:0000000000000000
[   14.708558][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.708712][   T12] CR2: 00007f4dd81f3000 CR3: 000000002b539006 CR4: 0000000000771ef0
[   14.708899][   T12] PKRU: 55555554
[   14.708990][   T12] Call Trace:
[   14.709084][   T12]  <TASK>
[   14.709146][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   14.709305][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   14.709455][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   14.709577][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   14.709698][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   14.709818][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   14.709938][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   14.710058][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   14.710181][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   14.710309][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   14.710431][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   14.710549][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   14.710673][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   14.710797][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   14.710916][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   14.711038][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   14.711160][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   14.711286][   T12]  process_one_work (kernel/workqueue.c:3314)
[   14.711409][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   14.711534][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   14.711659][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   14.711783][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   14.711900][   T12]  kthread (kernel/kthread.c:436)
[   14.711990][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   14.712141][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   14.712265][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   14.712386][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   14.712537][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   14.712660][   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
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:netif_close_many:unregister_netdevice_many_notify:default_device_exit_batch
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:__dev_notify_flags:netif_change_flags:rtnl_newlink