======================================
| [  431.226657] br0: port 2(s1) entered forwarding state
| [  433.244615] eth0: entered promiscuous mode
| [  445.858305] eth0: left promiscuous mode
| [  445.911442] Oops: general protection fault, probably for non-canonical address 0xdead000000000122: 0000 [#1] PREEMPT SMP NOPTI
[  445.911612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  445.911683] RIP: 0010:neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[ 445.911731] Code: 89 d6 48 83 ed 10 0f 84 08 01 00 00 48 8b 5d 10 45 84 f6 74 0d 80 bd 9c 00 00 00 00 0f 88 e0 00 00 00 48 8b 45 00 48 8b 55 08 <48> 89 02 48 85 c0 74 04 48 89 50 08 48 8b 45 10 48 8b 55 18 4c 89
All code
========
   0:	89 d6                	mov    %edx,%esi
   2:	48 83 ed 10          	sub    $0x10,%rbp
   6:	0f 84 08 01 00 00    	je     0x114
   c:	48 8b 5d 10          	mov    0x10(%rbp),%rbx
  10:	45 84 f6             	test   %r14b,%r14b
  13:	74 0d                	je     0x22
  15:	80 bd 9c 00 00 00 00 	cmpb   $0x0,0x9c(%rbp)
  1c:	0f 88 e0 00 00 00    	js     0x102
  22:	48 8b 45 00          	mov    0x0(%rbp),%rax
  26:	48 8b 55 08          	mov    0x8(%rbp),%rdx
  2a:*	48 89 02             	mov    %rax,(%rdx)		<-- trapping instruction
  2d:	48 85 c0             	test   %rax,%rax
  30:	74 04                	je     0x36
  32:	48 89 50 08          	mov    %rdx,0x8(%rax)
  36:	48 8b 45 10          	mov    0x10(%rbp),%rax
  3a:	48 8b 55 18          	mov    0x18(%rbp),%rdx
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 89 02             	mov    %rax,(%rdx)
   3:	48 85 c0             	test   %rax,%rax
   6:	74 04                	je     0xc
   8:	48 89 50 08          	mov    %rdx,0x8(%rax)
   c:	48 8b 45 10          	mov    0x10(%rbp),%rax
  10:	48 8b 55 18          	mov    0x18(%rbp),%rdx
  14:	4c                   	rex.WR
  15:	89                   	.byte 0x89
[  445.911837] RSP: 0018:ffffb08286033640 EFLAGS: 00010246
[  445.911877] RAX: 0000000000000000 RBX: ffff8a85c21ad410 RCX: 0000000000000020
[  445.911925] RDX: dead000000000122 RSI: ffff8a85c1185000 RDI: 0000000000000002
[  445.911985] RBP: ffff8a85c21adc00 R08: 0000000000000003 R09: 0000000000000003
[  445.912033] R10: ffff8a85c1db5d30 R11: 80410004803e0004 R12: ffffffff9d4277a0
[  445.912081] R13: dead000000000122 R14: 0000000000000000 R15: 0000000000000000
[  445.912133] FS:  00007f7444b9e800(0000) GS:ffff8a85fec00000(0000) knlGS:0000000000000000
[  445.912187] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  445.912231] CR2: 00000000004e29d0 CR3: 0000000002670004 CR4: 0000000000772ef0
[  445.912281] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  445.912342] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  445.912391] PKRU: 55555554
[  445.912412] Call Trace:
[  445.912440]  <TASK>
[  445.912462] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[  445.912498] ? exc_general_protection (arch/x86/kernel/traps.c:748 arch/x86/kernel/traps.c:693) 
[  445.912538] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[  445.912591] ? neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[  445.912639] __neigh_ifdown.isra.0 (net/core/neighbour.c:425) 
[  445.912686] neigh_ifdown (net/core/neighbour.c:445) 
[  445.912718] fib_netdev_event (net/ipv4/fib_frontend.c:1521) 
[  445.912756] notifier_call_chain (kernel/notifier.c:93) 
[  445.912790] dev_close_many (net/core/dev.c:1590) 
[  445.912824] unregister_netdevice_many_notify (net/core/dev.c:11503) 
[  445.912866] ? sock_def_readable (net/core/sock.c:3459) 
[  445.912898] ? __netlink_sendskb (net/netlink/af_netlink.c:1278) 
[  445.912930] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[  445.912960] ? unregister_netdevice_queue (net/core/dev.c:11455) 
[  445.912995] rtnl_dellink (net/core/rtnetlink.c:3329 net/core/rtnetlink.c:3379) 
[  445.913031] ? rtnl_getlink (./include/net/netlink.h:1159 net/core/rtnetlink.c:819 net/core/rtnetlink.c:3937) 
[  445.913063] ? sched_balance_newidle.constprop.0 (kernel/sched/fair.c:12825) 
[  445.913108] ? __rtnl_unlock (net/core/rtnetlink.c:140 (discriminator 3)) 
[  445.913138] ? netdev_run_todo (./include/linux/list.h:373 net/core/dev.c:10890) 
[  445.913166] rtnetlink_rcv_msg (net/core/rtnetlink.c:6721) 
[  445.913194] ? get_page_from_freelist (mm/page_alloc.c:1035 mm/page_alloc.c:1535 mm/page_alloc.c:1545 mm/page_alloc.c:3457) 
[  445.913233] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6615) 
[  445.913267] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[  445.913303] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[  445.913334] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[  445.913365] ____sys_sendmsg (net/socket.c:729 net/socket.c:744 net/socket.c:2607) 
[  445.913400] ? copy_msghdr_from_user (net/socket.c:2547) 
[  445.913438] ___sys_sendmsg (net/socket.c:2663) 
[  445.913470] ? do_wp_page (./include/linux/mmu_notifier.h:468 mm/memory.c:3460 mm/memory.c:3745) 
[  445.913500] ? __pte_offset_map (./include/linux/pgtable.h:324 ./include/linux/pgtable.h:594 mm/pgtable-generic.c:289) 
[  445.913532] ? __pte_offset_map (./include/linux/pgtable.h:324 ./include/linux/pgtable.h:594 mm/pgtable-generic.c:289) 
[  445.913573] ? fsnotify_grab_connector (fs/notify/mark.c:696) 
[  445.913613] ? fsnotify_destroy_marks (fs/notify/mark.c:923) 
[  445.913651] __sys_sendmsg (./include/linux/file.h:35 net/socket.c:2692) 
[  445.913682] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[  445.913716] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  445.913756] RIP: 0033:0x7f7444daa7b7
[ 445.913788] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[  445.913905] RSP: 002b:00007ffe307bf6a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  445.913959] RAX: ffffffffffffffda RBX: 00007ffe307bfde0 RCX: 00007f7444daa7b7
[  445.914008] RDX: 0000000000000000 RSI: 00007ffe307bf710 RDI: 0000000000000005
[  445.914057] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[  445.914106] R10: 00007f7444c684a8 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
neigh_ifdown:fib_netdev_event:notifier_call_chain:dev_close_many:unregister_netdevice_many_notify