======================================
| [ 6273.049067][ T5965] br0: port 2(eth1) entered forwarding state
| [ 6278.637900][    C3] ------------[ cut here ]------------
| [ 6278.638495][ C3] WARNING: CPU: 3 PID: 9144 at ./include/linux/skbuff.h:1164 icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
| [ 6278.639190][    C3] Modules linked in: sch_fq act_mirred xfrm_user l2tp_ip6 l2tp_eth l2tp_ip l2tp_netlink l2tp_core vxcan can_dev xfrm_interface ip6_gre ip_gre gre macsec ipvlan unix_diag cls_matchall act_gact cls_flower chacha chacha_x86_64 libchacha chacha20poly1305 libpoly1305 poly1305_x86_64 tls cls_bpf sch_ingress ip6t_rpfilter vxlan mpls_gso mpls_iptunnel mpls_router xt_HL nft_compat nf_tables amt [last unloaded: test_bpf]
[ 6278.642982][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 6278.643556][ C3] RIP: 0010:icmp_route_lookup.constprop.0 (./include/linux/skbuff.h:1164 ./include/linux/skbuff.h:1178 net/ipv4/icmp.c:548) 
[ 6278.644015][ C3] Code: ea 03 80 3c 02 00 0f 85 4f 05 00 00 49 8b 44 24 58 48 89 44 24 08 a8 01 0f 85 39 02 00 00 48 f7 44 24 08 fe ff ff ff 74 04 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 4c 89 da 48 c1 ea 03 80 3c
All code
========
   0:	ea                   	(bad)
   1:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   7:	85 4f 05             	test   %ecx,0x5(%rdi)
   a:	00 00                	add    %al,(%rax)
   c:	49 8b 44 24 58       	mov    0x58(%r12),%rax
  11:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  16:	a8 01                	test   $0x1,%al
  18:	0f 85 39 02 00 00    	jne    0x257
  1e:	48 f7 44 24 08 fe ff 	testq  $0xfffffffffffffffe,0x8(%rsp)
  25:	ff ff 
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	4c 89 da             	mov    %r11,%rdx
  3a:	48 c1 ea 03          	shr    $0x3,%rdx
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	4c 89 da             	mov    %r11,%rdx
  10:	48 c1 ea 03          	shr    $0x3,%rdx
  14:	80                   	.byte 0x80
  15:	3c                   	.byte 0x3c
[ 6278.645235][    C3] RSP: 0018:ffffc900002705e8 EFLAGS: 00010286
[ 6278.645664][    C3] RAX: ffff88800ea081c0 RBX: 1ffff9200004e0c1 RCX: 0000000000000002
[ 6278.646176][    C3] RDX: 1ffff1100162db23 RSI: ffffffffaff123fb RDI: ffffc9000027069a
[ 6278.646706][    C3] RBP: ffff88800a900040 R08: 0000000000000001 R09: ffff88800ea09cc0
[ 6278.647234][    C3] R10: ffffe8ffffd9782f R11: ffff88800b16d918 R12: ffff88800b16d8c0
[ 6278.647746][    C3] R13: ffffc90000270898 R14: ffff88800ea09540 R15: ffffc90000270628
[ 6278.648263][    C3] FS:  00007f6ca195f300(0000) GS:ffff8880bab12000(0000) knlGS:0000000000000000
[ 6278.648874][    C3] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6278.649304][    C3] CR2: 00007f6ca1baf8b0 CR3: 000000001da89004 CR4: 0000000000772ef0
[ 6278.649826][    C3] PKRU: 55555554
[ 6278.650083][    C3] Call Trace:
[ 6278.650338][    C3]  <IRQ>
[ 6278.650520][ C3] ? __pfx_icmp_route_lookup.constprop.0 (net/ipv4/icmp.c:480) 
[ 6278.650972][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 6278.651322][ C3] ? __ip_options_echo (net/ipv4/ip_options.c:86) 
[ 6278.651665][ C3] ? __icmp_send (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/ipv4/icmp.c:718) 
[ 6278.652006][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 6278.652348][ C3] __icmp_send (net/ipv4/icmp.c:746) 
[ 6278.652706][ C3] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 6278.653059][ C3] ? fib_lookup.constprop.0 (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/ip_fib.h:403) 
[ 6278.653402][ C3] ? ip_route_input_slow (net/ipv4/route.c:2177 net/ipv4/route.c:2385) 
[ 6278.653748][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 6278.654108][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 6278.654454][ C3] ip_rt_send_redirect (net/ipv4/route.c:920) 
[ 6278.654808][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 6278.655157][ C3] ? __pfx_ip_rt_send_redirect (net/ipv4/route.c:868) 
[ 6278.655500][ C3] ? ip_dst_mtu_maybe_forward.constprop.0 (./include/linux/rcupdate.h:873 ./include/net/ip.h:501) 
[ 6278.655931][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 6278.656273][ C3] ? ip_forward (net/ipv4/ip_forward.c:157) 
[ 6278.656612][ C3] ip_forward (net/ipv4/ip_forward.c:157) 
[ 6278.656960][ C3] ? debug_object_activate (lib/debugobjects.c:837) 
[ 6278.657298][ C3] ip_rcv (./include/net/dst.h:471 ./include/net/dst.h:469 net/ipv4/ip_input.c:454 ./include/linux/netfilter.h:317 ./include/linux/netfilter.h:311 net/ipv4/ip_input.c:574) 
[ 6278.657549][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 6278.657896][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 6278.658232][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 6278.658571][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 6278.658928][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:567) 
[ 6278.659252][ C3] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 6278.659579][ C3] __netif_receive_skb_one_core (net/core/dev.c:5979 (discriminator 4)) 
[ 6278.659999][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5972) 
[ 6278.660410][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 6278.660777][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 6278.661111][ C3] ? process_backlog (./include/linux/local_lock_internal.h:54 net/core/dev.c:6442) 
[ 6278.661447][ C3] process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6445) 
[ 6278.661812][ C3] __napi_poll.constprop.0 (net/core/dev.c:7482) 
[ 6278.662141][ C3] net_rx_action (net/core/dev.c:7546 net/core/dev.c:7673) 
[ 6278.662482][ C3] ? __pfx_net_rx_action (net/core/dev.c:7635) 
[ 6278.662838][ C3] ? sched_ttwu_pending (kernel/sched/sched.h:1795 kernel/sched/sched.h:1863 kernel/sched/core.c:3858) 
[ 6278.663173][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 6278.663514][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 6278.663860][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 6278.664224][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 6278.664578][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 6278.664924][ C3] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[ 6278.665176][    C3]  </IRQ>
[ 6278.665346][    C3]  <TASK>
[ 6278.665518][ C3] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 6278.665875][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 6278.666200][ C3] __dev_queue_xmit (net/core/dev.c:4741) 
[ 6278.666533][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 6278.666882][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4621) 
[ 6278.667213][ C3] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 ./include/net/neighbour.h:501) 
[ 6278.667540][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 6278.667879][ C3] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 ./include/net/neighbour.h:501) 
[ 6278.668215][ C3] ip_finish_output2 (./include/net/neighbour.h:545 net/ipv4/ip_output.c:235) 
[ 6278.668543][ C3] ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/ip.h:501 ./include/net/ip.h:515) 
[ 6278.668897][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 6278.669246][ C3] ? __ip_finish_output (./include/linux/skbuff.h:1685 ./include/linux/skbuff.h:5079 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 6278.669583][ C3] ip_output (./include/linux/netfilter.h:306 net/ipv4/ip_output.c:433) 
[ 6278.669843][ C3] ? __ip_local_out (net/ipv4/ip_output.c:96 net/ipv4/ip_output.c:107) 
[ 6278.670178][ C3] ? __pfx_ip_output (net/ipv4/ip_output.c:427) 
[ 6278.670509][ C3] ? __ip_make_skb (net/ipv4/ip_output.c:1382 net/ipv4/ip_output.c:1492) 
[ 6278.670866][ C3] ? __pfx_raw_getfrag (net/ipv4/raw.c:453) 
[ 6278.671206][ C3] ? ip_append_data (net/ipv4/ip_output.c:1371 net/ipv4/ip_output.c:1350) 
[ 6278.671550][ C3] ip_push_pending_frames (./include/net/dst.h:461 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1501 net/ipv4/ip_output.c:1521) 
[ 6278.671903][ C3] raw_sendmsg (net/ipv4/raw.c:658) 
[ 6278.672236][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 6278.672562][ C3] ? __pfx_raw_sendmsg (net/ipv4/raw.c:483) 
[ 6278.672896][ C3] ? do_fault_around (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/memory.c:5551) 
[ 6278.673224][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 6278.673578][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 6278.673916][ C3] ? __might_fault (mm/memory.c:6971 mm/memory.c:6965) 
[ 6278.674245][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 6278.674594][ C3] ? __might_fault (mm/memory.c:6971 mm/memory.c:6965) 
[ 6278.674944][ C3] __sys_sendto (net/socket.c:714 net/socket.c:729 net/socket.c:2228) 
[ 6278.675283][ C3] ? __pfx___sys_sendto (net/socket.c:2195) 
[ 6278.675631][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 6278.675975][ C3] ? rseq_update_cpu_node_id (kernel/rseq.c:189 (discriminator 10)) 
[ 6278.676315][ C3] ? __rseq_handle_notify_resume (kernel/rseq.c:442) 
[ 6278.676735][ C3] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 6278.677174][ C3] __x64_sys_sendto (net/socket.c:2231) 
[ 6278.677517][ C3] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 6278.677875][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 6278.678216][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 6278.678555][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 6278.678982][    C3] RIP: 0033:0x7f6ca1bf628a
[ 6278.679334][ 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
[ 6278.680555][    C3] RSP: 002b:00007ffe3966fd58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 6278.681078][    C3] RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007f6ca1bf628a
[ 6278.681585][    C3] RDX: 0000000000000048 RSI: 00000000362792a0 RDI: 0000000000000005
[ 6278.682445][    C3] RBP: 00007ffe3966fdb0 R08: 00000000004185e0 R09: 0000000000000010
[ 6278.682972][    C3] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000005c


Finger prints:
__icmp_send:ip_rt_send_redirect:ip_forward:ip_rcv:__netif_receive_skb_one_core