======================================
| [   32.298021][   T42] br1: port 2(veth2) entered forwarding state
| [   39.069256][    C3] ------------[ cut here ]------------
| [   39.069600][    C3] kernel BUG at net/core/skbuff.c:3505!
| [   39.069812][    C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   39.070301][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 39.070696][ C3] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.070902][ C3] Code: 44 89 14 24 ff d0 0f 1f 00 4c 8b 44 24 08 44 8b 14 24 41 89 c1 eb a5 89 e8 e9 2d fe ff ff 41 ff d5 0f 1f 00 e9 1f fa ff ff 90 <0f> 0b 48 8b 7c 24 10 89 54 24 48 48 89 44 24 40 e8 17 a6 91 fe 8b
All code
========
   0:	44 89 14 24          	mov    %r10d,(%rsp)
   4:	ff d0                	call   *%rax
   6:	0f 1f 00             	nopl   (%rax)
   9:	4c 8b 44 24 08       	mov    0x8(%rsp),%r8
   e:	44 8b 14 24          	mov    (%rsp),%r10d
  12:	41 89 c1             	mov    %eax,%r9d
  15:	eb a5                	jmp    0xffffffffffffffbc
  17:	89 e8                	mov    %ebp,%eax
  19:	e9 2d fe ff ff       	jmp    0xfffffffffffffe4b
  1e:	41 ff d5             	call   *%r13
  21:	0f 1f 00             	nopl   (%rax)
  24:	e9 1f fa ff ff       	jmp    0xfffffffffffffa48
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
  31:	89 54 24 48          	mov    %edx,0x48(%rsp)
  35:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  3a:	e8 17 a6 91 fe       	call   0xfffffffffe91a656
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
   7:	89 54 24 48          	mov    %edx,0x48(%rsp)
   b:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  10:	e8 17 a6 91 fe       	call   0xfffffffffe91a62c
  15:	8b                   	.byte 0x8b
[   39.071510][    C3] RSP: 0018:ffffc90000278920 EFLAGS: 00010202
[   39.071732][    C3] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11000a48dd9
[   39.071990][    C3] RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff888005246ec8
[   39.072249][    C3] RBP: 0000000000000000 R08: ffffc900002789e0 R09: fffffbfff591c5ea
[   39.072508][    C3] R10: ffffffffac8e2f57 R11: dffffc0000000000 R12: 0000000000000000
[   39.072764][    C3] R13: 0000000000000000 R14: ffffc900002789e0 R15: ffff8880035d7788
[   39.073021][    C3] FS:  00007fe93c02d300(0000) GS:ffff888036180000(0000) knlGS:0000000000000000
[   39.073323][    C3] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.073540][    C3] CR2: 0000000000407181 CR3: 0000000007b4a004 CR4: 0000000000770ef0
[   39.073810][    C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   39.074068][    C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   39.074325][    C3] PKRU: 55555554
[   39.074455][    C3] Call Trace:
[   39.074586][    C3]  <IRQ>
[ 39.074679][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 39.074813][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 39.074945][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.075119][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 39.075291][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.075468][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.075641][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 39.075813][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.075986][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 39.076167][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 39.076348][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 39.076525][ C3] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 39.076699][ C3] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 39.076916][ C3] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 39.077086][ C3] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 39.077258][ C3] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) 
[ 39.077391][ C3] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) 
[ 39.077573][ C3] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 39.077749][ C3] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 39.077923][ C3] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 39.078096][ C3] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) 
[ 39.078314][ C3] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 39.078446][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 39.078619][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 39.078794][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 39.078971][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 39.079143][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 39.079356][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 39.079572][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 39.079744][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 39.079921][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 39.080094][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 39.080268][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 39.080450][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 39.080624][ C3] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 39.080797][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 39.080970][ C3] __do_softirq (kernel/softirq.c:553) 
[ 39.081144][ C3] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) 
[ 39.081320][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   39.081452][    C3]  </IRQ>
[   39.081540][    C3]  <TASK>
[ 39.081627][ C3] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 39.081803][ C3] __neigh_event_send (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/neigh.h:237 net/core/neighbour.c:1246) 
[ 39.081979][ C3] neigh_resolve_output (net/core/neighbour.c:1547) 
[ 39.082152][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) 
[ 39.082325][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) 
[ 39.082498][ C3] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[ 39.082671][ C3] ? __pfx_get_random_u32 (drivers/char/random.c:532) 
[ 39.082845][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 39.083015][ C3] ? __pfx_raw_getfrag (net/ipv4/raw.c:446) 
[ 39.083187][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 39.083356][ C3] ? __pfx_vrf_ip_out_direct_finish (drivers/net/vrf.c:972) vrf
[ 39.083572][ C3] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 39.083745][ C3] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) 
[ 39.083875][ C3] ? __ip_local_out (./include/net/l3mdev.h:203 ./include/net/l3mdev.h:213 net/ipv4/ip_output.c:112) 
[ 39.084046][ C3] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 39.084218][ C3] ? __ip_make_skb (net/ipv4/ip_output.c:1379 net/ipv4/ip_output.c:1487) 
[ 39.084394][ C3] ? __pfx_raw_getfrag (net/ipv4/raw.c:446) 
[ 39.084566][ C3] ? ip_append_data (net/ipv4/ip_output.c:1368 net/ipv4/ip_output.c:1347) 
[ 39.084736][ C3] ip_push_pending_frames (./include/net/dst.h:450 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1496 net/ipv4/ip_output.c:1516) 
[ 39.084906][ C3] raw_sendmsg (net/ipv4/raw.c:648) 
[ 39.085078][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 39.085252][ C3] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476) 
[ 39.085422][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 39.085596][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 39.085773][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 39.085942][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 39.086118][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 39.086291][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 39.086470][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 39.086641][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 39.086811][ C3] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 39.086985][ C3] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 39.087157][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 39.087329][ C3] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 39.087502][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 39.087679][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 39.087847][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) 
[ 39.088019][ C3] ? rseq_ip_fixup (kernel/rseq.c:257 kernel/rseq.c:291) 
[ 39.088191][ C3] ? __pfx_find_vma (mm/mmap.c:1883) 
[ 39.088362][ C3] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 39.088537][ C3] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) 
[ 39.088714][ C3] __x64_sys_sendto (net/socket.c:2199) 
[ 39.088883][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 39.089101][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 39.089274][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   39.089493][    C3] RIP: 0033:0x7fe93c30385a
[ 39.089674][ C3] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[   39.090283][    C3] RSP: 002b:00007ffde9a3cd38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   39.090549][    C3] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fe93c30385a
[   39.090806][    C3] RDX: 0000000000000040 RSI: 0000000001e35340 RDI: 0000000000000005
[   39.091066][    C3] RBP: 00007ffde9a3cd90 R08: 00000000004185e0 R09: 0000000000000010
[   39.091325][    C3] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054


Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu