======================================
| xx__-> [    8.943598][  T177] ------------[ cut here ]------------
| [    8.943816][  T177] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: ip/177
| [    8.944065][  T177] Modules linked in:
| [    8.944555][  T177] Tainted: [W]=WARN
[    8.944660][  T177] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.944858][  T177] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.945070][  T177] 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 38 e5 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 38 e5 f0 ff       	call   0xfffffffffff0e574
  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 38 e5 f0 ff       	call   0xfffffffffff0e54a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.945568][  T177] RSP: 0018:ffa0000000887ab0 EFLAGS: 00010286
[    8.945743][  T177] RAX: 00000000ffffffa6 RBX: ff110000057d7e00 RCX: 1ff4000000110f1c
[    8.945948][  T177] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000057d7eb8
[    8.946158][  T177] RBP: ff11000009711000 R08: 1fe2200000afafd8 R09: ff1100000cca5180
[    8.946370][  T177] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.946574][  T177] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009711000
[    8.946779][  T177] FS:  00007f6c329ec840(0000) GS:ff11000087d43000(0000) knlGS:0000000000000000
[    8.947028][  T177] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.947204][  T177] CR2: 0000000000479648 CR3: 000000000bca2002 CR4: 0000000000771ef0
[    8.947419][  T177] PKRU: 55555554
[    8.947524][  T177] Call Trace:
[    8.947628][  T177]  <TASK>
[    8.947710][  T177]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.947850][  T177]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.947990][  T177]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.948098][  T177]  register_netdevice (net/core/dev.c:11488)
[    8.948235][  T177]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.948413][  T177]  register_netdev (net/core/dev.c:11552)
[    8.948548][  T177]  loopback_net_init (drivers/net/loopback.c:218)
[    8.948689][  T177]  ops_init (net/core/net_namespace.c:137)
[    8.948795][  T177]  setup_net (net/core/net_namespace.c:446)
[    8.948899][  T177]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.949036][  T177]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.949172][  T177]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.949318][  T177]  copy_net_ns (net/core/net_namespace.c:579)
[    8.949457][  T177]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.949597][  T177]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.949734][  T177]  ksys_unshare (kernel/fork.c:3243)
[    8.949872][  T177]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.950009][  T177]  ? __ia32_sys_open (fs/open.c:1374)
[    8.950157][  T177]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.950292][  T177]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.950434][  T177]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.950569][  T177]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.950708][  T177]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.950845][  T177]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.951015][  T177] RIP: 0033:0x7f6c32caebcb
[    8.951164][  T177] 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
[    8.951660][  T177] RSP: 002b:00007ffd40802998 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[    8.951866][  T177] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007f6c32caebcb
[    8.952074][  T177] RDX: 0000000000000000 RSI: 0000000000477309 RDI: 0000000040000000
[    8.952279][  T177] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[    8.952486][  T177] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd40804bc0
[    8.952691][  T177] R13: 0000000000000001 R14: 00007f6c329ec6f8 R15: 00007ffd4080571f
| [    8.977754][  T178] ------------[ cut here ]------------
| [    8.977924][  T178] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: ip/178
| [    8.978170][  T178] Modules linked in:
| [    8.979217][  T178] Tainted: [W]=WARN
[    8.979330][  T178] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.979500][  T178] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.979680][  T178] 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 38 e5 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 38 e5 f0 ff       	call   0xfffffffffff0e574
  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 38 e5 f0 ff       	call   0xfffffffffff0e54a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.980168][  T178] RSP: 0018:ffa0000000887030 EFLAGS: 00010286
[    8.980343][  T178] RAX: 00000000ffffffa6 RBX: ff110000057d6200 RCX: 1ff4000000110dcc
[    8.980545][  T178] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000057d62b8
[    8.980748][  T178] RBP: ff11000009711000 R08: 1fe2200000afac58 R09: ff1100000cf4ae58
[    8.980949][  T178] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000001
[    8.981155][  T178] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009711cd1
[    8.981367][  T178] FS:  00007fe46dc92840(0000) GS:ff11000087ec3000(0000) knlGS:0000000000000000
[    8.981605][  T178] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.981777][  T178] CR2: 00007fe46df621a0 CR3: 000000000d147004 CR4: 0000000000771ef0
[    8.981982][  T178] PKRU: 55555554
[    8.982090][  T178] Call Trace:
[    8.982193][  T178]  <TASK>
[    8.982263][  T178]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.982408][  T178]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.982513][  T178]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    8.982650][  T178]  __dev_notify_flags (net/core/dev.c:9787)
[    8.982786][  T178]  ? netif_change_name (net/core/dev.c:1495)
[    8.982922][  T178]  ? __dev_change_flags (net/core/dev.c:9752)
[    8.983064][  T178]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    8.983199][  T178]  ? 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))
[    8.983343][  T178]  netif_change_flags (net/core/dev.c:9820)
[    8.983481][  T178]  do_setlink.isra.0 (net/core/rtnetlink.c:3206 (discriminator 1))
[    8.983619][  T178]  ? rtnl_link_get_size (net/core/rtnetlink.c:716)
[    8.983756][  T178]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[    8.983925][  T178]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[    8.984067][  T178]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    8.984203][  T178]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[    8.984345][  T178]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    8.984485][  T178]  ? __kernel_text_address (kernel/extable.c:79)
[    8.984624][  T178]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.984762][  T178]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.984897][  T178]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    8.985036][  T178]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.985172][  T178]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[    8.985313][  T178]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.985450][  T178]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.985586][  T178]  ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 22))
[    8.985722][  T178]  ? __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)
[    8.985859][  T178]  ? __mutex_lock (kernel/locking/mutex.c:798 (discriminator 1) kernel/locking/mutex.c:820 (discriminator 1))
[    8.985995][  T178]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:341 net/core/rtnetlink.c:4149)
[    8.986139][  T178]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[    8.986277][  T178]  ? __rtnl_newlink (net/core/rtnetlink.c:4000)
[    8.986421][  T178]  rtnl_newlink (net/core/rtnetlink.c:4150)
[    8.986559][  T178]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.986695][  T178]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    8.986832][  T178]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    8.986966][  T178]  ? mark_usage (kernel/locking/lockdep.c:4674)
[    8.987127][  T178]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.987265][  T178]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.987406][  T178]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    8.987544][  T178]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    8.987681][  T178]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[    8.987818][  T178]  ? __rtnl_newlink (net/core/rtnetlink.c:4027 (discriminator 1))
[    8.987956][  T178]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7061)
[    8.988096][  T178]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    8.988232][  T178]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    8.988373][  T178]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.988510][  T178]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.988648][  T178]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[    8.988784][  T178]  netlink_rcv_skb (net/netlink/af_netlink.c:2551)
[    8.988922][  T178]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[    8.989064][  T178]  ? netlink_ack (./include/linux/skbuff.h:2718)
[    8.989203][  T178]  ? 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))
[    8.989345][  T178]  ? 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))
[    8.989483][  T178]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[    8.989621][  T178]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[    8.989760][  T178]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.989898][  T178]  netlink_sendmsg (net/netlink/af_netlink.c:1895)
[    8.990038][  T178]  ? netlink_unicast (./include/net/net_namespace.h:419 (discriminator 7))
[    8.990176][  T178]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.990320][  T178]  ____sys_sendmsg (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2698 (discriminator 4))
[    8.990457][  T178]  ? copy_msghdr_from_user (net/socket.c:2635)
[    8.990592][  T178]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5349)
[    8.990761][  T178]  ? move_addr_to_kernel (net/socket.c:258)
[    8.990899][  T178]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[    8.991039][  T178]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[    8.991178][  T178]  ___sys_sendmsg (net/socket.c:2752)
[    8.991318][  T178]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[    8.991490][  T178]  ? copy_msghdr_from_user (net/socket.c:2603)
[    8.991639][  T178]  __sys_sendmsg (net/socket.c:2784)
[    8.991778][  T178]  ? __sys_sendmsg_sock (net/socket.c:2765)
[    8.991914][  T178]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3156 (discriminator 6))
[    8.992092][  T178]  ? 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)
[    8.992227][  T178]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.992368][  T178]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.992502][  T178]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.992638][  T178]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.992773][  T178]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.992943][  T178] RIP: 0033:0x7fe46decc08e
[    8.993090][  T178] 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
[    8.993581][  T178] RSP: 002b:00007fffbeec2e90 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[    8.993788][  T178] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe46decc08e
[    8.993992][  T178] RDX: 0000000000000000 RSI: 00007fffbeec2f40 RDI: 0000000000000005
[    8.994199][  T178] RBP: 00007fffbeec2ea0 R08: 0000000000000000 R09: 0000000000000000
[    8.994408][  T178] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a10e6cc
[    8.994613][  T178] R13: 000000000049f620 R14: 0000000000000000 R15: 00007fffbeec3610
| [   24.244618][   T12] ------------[ cut here ]------------
| [   24.244849][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   24.245119][   T12] Modules linked in: tcp_diag mptcp_diag inet_diag
| [   24.245692][   T12] Tainted: [W]=WARN
[   24.245790][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.245951][   T12] Workqueue: netns cleanup_net
[   24.246103][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   24.246272][   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 38 e5 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 38 e5 f0 ff       	call   0xfffffffffff0e574
  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 38 e5 f0 ff       	call   0xfffffffffff0e54a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   24.246780][   T12] RSP: 0018:ffa00000000c7748 EFLAGS: 00010286
[   24.246944][   T12] RAX: 00000000ffffffa6 RBX: ff11000014ac5380 RCX: 1ff4000000018eaf
[   24.247144][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000014ac5438
[   24.247345][   T12] RBP: ff11000009711000 R08: 1fe2200002958a88 R09: ff11000001b051d0
[   24.247536][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000041
[   24.247729][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: ffa00000000c77e0
[   24.247922][   T12] FS:  0000000000000000(0000) GS:ff11000087d43000(0000) knlGS:0000000000000000
[   24.248155][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.248328][   T12] CR2: 000055aa6a8c79ac CR3: 000000000bca1004 CR4: 0000000000771ef0
[   24.248523][   T12] PKRU: 55555554
[   24.248622][   T12] Call Trace:
[   24.248717][   T12]  <TASK>
[   24.248786][   T12]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   24.248917][   T12]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   24.249015][   T12]  netif_close_many (net/core/dev.c:1804)
[   24.249146][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   24.249275][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.249439][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.249611][   T12]  ? __dev_close_many (net/core/dev.c:1781)
[   24.249772][   T12]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   24.251207][   T12]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[   24.251364][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   24.251529][   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)
[   24.251661][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   24.251793][   T12]  ? default_device_exit_net (net/core/dev.c:13033 (discriminator 1))
[   24.251926][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   24.252093][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   24.252226][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   24.252369][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   24.252499][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   24.252634][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   24.252765][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   24.252892][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   24.253023][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   24.253159][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   24.253288][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   24.253429][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   24.253558][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   24.253686][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   24.253816][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   24.253942][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.254078][   T12]  process_one_work (kernel/workqueue.c:3314)
[   24.254209][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   24.254345][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   24.254481][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   24.254613][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   24.254742][   T12]  kthread (kernel/kthread.c:436)
[   24.254838][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   24.254997][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   24.255130][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   24.255260][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   24.255429][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   24.255557][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   24.255686][   T12]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   24.258952][   T12] ------------[ cut here ]------------
| [   24.259100][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   24.259354][   T12] Modules linked in: tcp_diag mptcp_diag inet_diag
| [   24.259864][   T12] Tainted: [W]=WARN
[   24.259961][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.260127][   T12] Workqueue: netns cleanup_net
[   24.260258][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   24.260428][   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 38 e5 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 38 e5 f0 ff       	call   0xfffffffffff0e574
  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 38 e5 f0 ff       	call   0xfffffffffff0e54a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   24.260875][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   24.261032][   T12] RAX: 00000000ffffffa6 RBX: ff11000017b4f8c0 RCX: 1ff4000000018ed5
[   24.261222][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000017b4f978
[   24.261420][   T12] RBP: ff11000009711000 R08: 1fe2200002f69f30 R09: ff11000001b051d0
[   24.261610][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   24.261795][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   24.261983][   T12] FS:  0000000000000000(0000) GS:ff11000087d43000(0000) knlGS:0000000000000000
[   24.262208][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   24.262371][   T12] CR2: 000055aa6a8c79ac CR3: 000000000bca1004 CR4: 0000000000771ef0
[   24.262609][   T12] PKRU: 55555554
[   24.262700][   T12] Call Trace:
[   24.262794][   T12]  <TASK>
[   24.262862][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   24.263021][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   24.263183][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   24.263316][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   24.263444][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   24.263572][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   24.263698][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   24.263829][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   24.263953][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   24.264082][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   24.264214][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   24.264344][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   24.264472][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   24.264595][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   24.264717][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   24.264843][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   24.264966][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.265098][   T12]  process_one_work (kernel/workqueue.c:3314)
[   24.265239][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   24.265368][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   24.265499][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   24.265626][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   24.265750][   T12]  kthread (kernel/kthread.c:436)
[   24.265843][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   24.266004][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   24.266135][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   24.266260][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   24.266421][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   24.266545][   T12]  ? kthread_affine_node (kernel/kthread.c:378)


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