======================================
| [   41.985431][    T8] br1: port 4(veth2) entered forwarding state
| [   44.580384][    C1] ------------[ cut here ]------------
| [   44.580726][    C1] kernel BUG at net/core/skbuff.c:3505!
| [   44.580972][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   44.581487][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 44.581898][ C1] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.582101][ C1] 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
[   44.582768][    C1] RSP: 0018:ffffc900001c8910 EFLAGS: 00010206
[   44.583001][    C1] RAX: 0000000000008abe RBX: 0000000000000008 RCX: 1ffff11000f5d439
[   44.583292][    C1] RDX: 00000000000000a6 RSI: dffffc0000000000 RDI: ffff888007aea1c8
[   44.583554][    C1] RBP: 0000000000008abe R08: 0000000000000008 R09: fffffbfff78dc5ea
[   44.583804][    C1] R10: ffffffffbc6e2f57 R11: dffffc0000000000 R12: 0000000000000008
[   44.584051][    C1] R13: 0000000000000000 R14: ffffc900001c89d0 R15: ffff888007fbfcc8
[   44.584314][    C1] FS:  0000000000000000(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[   44.584639][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.584869][    C1] CR2: 00007f56dd7e3270 CR3: 000000003271e004 CR4: 0000000000770ef0
[   44.585117][    C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.585390][    C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.585676][    C1] PKRU: 55555554
[   44.585837][    C1] Call Trace:
[   44.585963][    C1]  <IRQ>
[ 44.586079][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 44.586222][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 44.586363][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.586575][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 44.586744][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.586926][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.587106][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 44.587269][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.587466][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 44.587627][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 44.587838][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) 
[ 44.588017][ C1] __skb_checksum_complete (net/core/skbuff.c:3643) 
[ 44.588188][ C1] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) 
[ 44.588426][ C1] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) 
[ 44.588613][ C1] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) 
[ 44.588796][ C1] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) 
[ 44.588950][ C1] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) 
[ 44.589115][ C1] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 44.589441][ C1] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 44.589605][ C1] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 44.589810][ C1] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) 
[ 44.590019][ C1] 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) 
[ 44.590255][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 44.590451][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.590640][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 44.590809][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 44.591093][ C1] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 44.591329][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 44.591543][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.591731][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 44.592004][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 44.592179][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 44.592350][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 44.592508][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 44.592771][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 44.592935][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 44.593138][ C1] ? note_gp_changes (kernel/rcu/tree.c:1283 (discriminator 31)) 
[ 44.593299][ C1] __do_softirq (kernel/softirq.c:553) 
[ 44.593465][ C1] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) 
[ 44.593584][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14)) 
[   44.593744][    C1]  </IRQ>
[   44.593829][    C1]  <TASK>
[ 44.593910][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649) 
[ 44.594109][ C1] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) 
[ 44.594278][ C1] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 73 a4 3e 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 73 a4 3e 00 	verw   0x3ea473(%rip)        # 0x3ea49b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   44.594937][    C1] RSP: 0018:ffffc9000013fdf8 EFLAGS: 00000246
[   44.595137][    C1] RAX: 000000000008f255 RBX: 1ffff92000027fc1 RCX: ffffffffbaa76802
[   44.595375][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb8497aa6
[   44.595718][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c16e64
[   44.595959][    C1] R10: ffff8880360b7323 R11: ffff8880360bbec0 R12: 0000000000000000
[   44.596204][    C1] R13: ffff888001b60040 R14: dffffc0000000000 R15: 0000000000000000
[ 44.596453][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) 
[ 44.596620][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:171) 
[ 44.596822][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:98) 
[ 44.596986][ C1] cpuidle_idle_call (kernel/sched/idle.c:171) 
[ 44.597166][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:147) 
[ 44.597328][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 44.597509][ C1] do_idle (kernel/sched/idle.c:312) 
[ 44.597631][ C1] cpu_startup_entry (kernel/sched/idle.c:409 (discriminator 1)) 
[ 44.597812][ C1] start_secondary (arch/x86/kernel/smpboot.c:224 arch/x86/kernel/smpboot.c:304) 
[ 44.598061][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:254) 


Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu