======================================
| [ 5549.947220][T19350] br0: port 1(eth1) entered blocking state
| [ 5549.947584][T19350] br0: port 1(eth1) entered forwarding state
| [ 5563.383912][T19379] Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [ 5563.384395][T19379] KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127]
[ 5563.384852][T19379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[5563.385166][T19379] RIP: 0010:neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[ 5563.385353][T19379] Code: 0f 85 ef 04 00 00 49 8d 7f 08 49 8b 1f 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 cc 04 00 00 49 8b 6f 08 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 19 05 00 00 48 89 5d 00 48 85 db 74 1a 48 8d
All code
========
   0:	0f 85 ef 04 00 00    	jne    0x4f5
   6:	49 8d 7f 08          	lea    0x8(%r15),%rdi
   a:	49 8b 1f             	mov    (%r15),%rbx
   d:	48 89 f8             	mov    %rdi,%rax
  10:	48 c1 e8 03          	shr    $0x3,%rax
  14:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  19:	0f 85 cc 04 00 00    	jne    0x4eb
  1f:	49 8b 6f 08          	mov    0x8(%r15),%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)		<-- trapping instruction
  2f:	0f 85 19 05 00 00    	jne    0x54e
  35:	48 89 5d 00          	mov    %rbx,0x0(%rbp)
  39:	48 85 db             	test   %rbx,%rbx
  3c:	74 1a                	je     0x58
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d

Code starting with the faulting instruction
===========================================
   0:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   5:	0f 85 19 05 00 00    	jne    0x524
   b:	48 89 5d 00          	mov    %rbx,0x0(%rbp)
   f:	48 85 db             	test   %rbx,%rbx
  12:	74 1a                	je     0x2e
  14:	48                   	rex.W
  15:	8d                   	.byte 0x8d
[ 5563.385861][T19379] RSP: 0018:ffffc90001c8ef60 EFLAGS: 00010a06
[ 5563.386042][T19379] RAX: 1bd5a00000000024 RBX: ffff88800a0e2800 RCX: 0000000000000000
[ 5563.386253][T19379] RDX: 1ffff1100107759e RSI: ffff8880083ba000 RDI: ffff88800616c008
[ 5563.386461][T19379] RBP: dead000000000122 R08: ffff88800616c000 R09: fffff52000391ded
[ 5563.386673][T19379] R10: 0000000000000003 R11: 0000000000000018 R12: ffff88800616c13c
[ 5563.386880][T19379] R13: dffffc0000000000 R14: ffff8880083ba000 R15: ffff88800616c000
[ 5563.387093][T19379] FS:  00007fe9770cb800(0000) GS:ffff88802f400000(0000) knlGS:0000000000000000
[ 5563.387346][T19379] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5563.387525][T19379] CR2: 00000000004e3868 CR3: 0000000009e1c001 CR4: 0000000000772ef0
[ 5563.387737][T19379] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5563.387945][T19379] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5563.388150][T19379] PKRU: 55555554
[ 5563.388260][T19379] Call Trace:
[ 5563.388364][T19379]  <TASK>
[5563.388440][T19379] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[5563.388555][T19379] ? exc_general_protection (arch/x86/kernel/traps.c:751 arch/x86/kernel/traps.c:693) 
[5563.388698][T19379] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:617) 
[5563.388841][T19379] ? neigh_flush_dev.isra.0 (./include/linux/list.h:988 ./include/linux/rculist.h:516 net/core/neighbour.c:384) 
[5563.388979][T19379] ? lock_acquire (kernel/locking/lockdep.c:5798) 
[5563.389120][T19379] __neigh_ifdown.isra.0 (net/core/neighbour.c:826 net/core/neighbour.c:426) 
[5563.389266][T19379] ? fib_flush (net/ipv4/fib_frontend.c:195 (discriminator 11)) 
[5563.389396][T19379] neigh_ifdown (net/core/neighbour.c:445) 
[5563.389501][T19379] fib_netdev_event (net/ipv4/fib_frontend.c:1521) 
[5563.389642][T19379] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[5563.389788][T19379] __netdev_upper_dev_unlink (net/core/dev.c:7704 (discriminator 11) net/core/dev.c:8156 (discriminator 11)) 
[5563.389926][T19379] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[5563.390029][T19379] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8135) 
[5563.390203][T19379] netdev_upper_dev_unlink (net/core/dev.c:8174) 
[5563.390340][T19379] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8174) 
[5563.390513][T19379] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) 
[5563.390654][T19379] vrf_del_slave (drivers/net/vrf.c:1131 drivers/net/vrf.c:1140) 
[5563.390795][T19379] do_set_master (net/core/rtnetlink.c:2762) 
[5563.390936][T19379] do_setlink (net/core/rtnetlink.c:2982) 
[5563.391077][T19379] ? is_bpf_text_address (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 kernel/bpf/core.c:769) 
[5563.391215][T19379] ? __pfx_do_setlink (net/core/rtnetlink.c:2853) 
[5563.391353][T19379] ? is_bpf_text_address (kernel/bpf/core.c:772) 
[5563.391489][T19379] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[5563.391632][T19379] ? __kernel_text_address (kernel/extable.c:79) 
[5563.391769][T19379] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[5563.391919][T19379] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[5563.392093][T19379] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[5563.392243][T19379] ? stack_trace_save (kernel/stacktrace.c:123) 
[5563.392382][T19379] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[5563.392519][T19379] ? __pfx_validate_nla (lib/nlattr.c:396) 
[5563.392660][T19379] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[5563.392768][T19379] ? kasan_save_stack (mm/kasan/common.c:49) 
[5563.392910][T19379] ? __nla_validate_parse (lib/nlattr.c:638) 
[5563.393050][T19379] __rtnl_newlink (net/core/rtnetlink.c:3771) 
[5563.393190][T19379] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[5563.393329][T19379] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3632) 
[5563.393469][T19379] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[5563.393641][T19379] ? __create_object (mm/kmemleak.c:766) 
[5563.393783][T19379] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[5563.393922][T19379] rtnl_newlink (net/core/rtnetlink.c:3819) 
[5563.394030][T19379] rtnetlink_rcv_msg (net/core/rtnetlink.c:6721) 
[5563.394170][T19379] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6615) 
[5563.394309][T19379] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[5563.394448][T19379] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[5563.394554][T19379] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[5563.394693][T19379] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[5563.394834][T19379] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6615) 
[5563.394972][T19379] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[5563.395119][T19379] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[5563.395261][T19379] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[5563.395401][T19379] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[5563.395539][T19379] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[5563.395674][T19379] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[5563.395815][T19379] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[5563.395954][T19379] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[5563.396090][T19379] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[5563.396233][T19379] ? __import_iovec (lib/iov_iter.c:1433 lib/iov_iter.c:1449) 
[5563.396376][T19379] ____sys_sendmsg (net/socket.c:729 net/socket.c:744 net/socket.c:2607) 
[5563.396519][T19379] ? __pfx_____sys_sendmsg (net/socket.c:2553) 
[5563.396656][T19379] ? __pfx_copy_msghdr_from_user (net/socket.c:2533) 
[5563.396832][T19379] ___sys_sendmsg (net/socket.c:2663) 
[5563.396971][T19379] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[5563.397110][T19379] ? __pfx____sys_sendmsg (net/socket.c:2650) 
[5563.397247][T19379] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[5563.397394][T19379] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[5563.397570][T19379] ? kasan_save_stack (mm/kasan/common.c:49) 
[5563.397707][T19379] ? kasan_save_stack (mm/kasan/common.c:48) 
[5563.397842][T19379] ? __kasan_record_aux_stack (mm/kasan/generic.c:541) 
[5563.397980][T19379] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:123 kernel/rcu/tree.c:3087) 
[5563.398156][T19379] ? __x64_sys_close (fs/open.c:1568 fs/open.c:1550 fs/open.c:1550) 
[5563.398295][T19379] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[5563.398437][T19379] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[5563.398612][T19379] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[5563.398753][T19379] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[5563.398891][T19379] ? __lock_release (kernel/locking/lockdep.c:5501) 
[5563.399029][T19379] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[5563.399138][T19379] __sys_sendmsg (./include/linux/file.h:35 net/socket.c:2692) 
[5563.399280][T19379] ? __pfx___sys_sendmsg (net/socket.c:2678) 
[5563.399421][T19379] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2053 arch/x86/mm/physaddr.c:65) 
[5563.399573][T19379] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[5563.399715][T19379] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 5563.399884][T19379] RIP: 0033:0x7fe9772d77b7
[ 5563.400034][T19379] 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)
[ 5563.400524][T19379] RSP: 002b:00007ffeabbe33e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 5563.400730][T19379] RAX: ffffffffffffffda RBX: 00007ffeabbe3b10 RCX: 00007fe9772d77b7
[ 5563.400941][T19379] RDX: 0000000000000000 RSI: 00007ffeabbe3450 RDI: 0000000000000005
[ 5563.401148][T19379] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[ 5563.401352][T19379] R10: 00007fe977195ef8 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
neigh_ifdown:fib_netdev_event:notifier_call_chain:__netdev_upper_dev_unlink:netdev_upper_dev_unlink