======================================
| [  574.991171][  T116] br0: port 1(swp1) entered forwarding state
| [  575.128223][    C0] ------------[ cut here ]------------
| [  575.128487][    C0] WARNING: ./include/linux/skbuff.h:3239 at __udp4_lib_err_encap+0x69a/0xad0, CPU#0: 1/10
| [  575.129089][    C0] Modules linked in: sch_fq vxlan ip6t_rpfilter nft_compat nf_tables act_mirred pktgen drop_monitor act_gact cls_flower cls_bpf sch_ingress netdevsim psample [last unloaded: test_bpf]
[  575.129934][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  575.130112][    C0] Workqueue: mld mld_dad_work
[  575.130261][    C0] RIP: 0010:__udp4_lib_err_encap (./include/linux/skbuff.h:3239 (discriminator 3) ./include/linux/skbuff.h:3235 (discriminator 3) net/ipv4/udp.c:864 (discriminator 3))
[  575.130448][    C0] Code: 84 02 00 00 0f b6 2e 83 e5 0f 90 0f 0b 90 e9 ef fa ff ff 90 0f 0b 90 90 0f 0b 90 e9 bd fc ff ff 90 0f 0b 90 e9 57 fa ff ff 90 <0f> 0b 90 e9 65 fa ff ff 4c 8b 74 24 20 4c 8b 6c 24 28 4d 89 fa 45
All code
========
   0:	84 02                	test   %al,(%rdx)
   2:	00 00                	add    %al,(%rax)
   4:	0f b6 2e             	movzbl (%rsi),%ebp
   7:	83 e5 0f             	and    $0xf,%ebp
   a:	90                   	nop
   b:	0f 0b                	ud2
   d:	90                   	nop
   e:	e9 ef fa ff ff       	jmp    0xfffffffffffffb02
  13:	90                   	nop
  14:	0f 0b                	ud2
  16:	90                   	nop
  17:	90                   	nop
  18:	0f 0b                	ud2
  1a:	90                   	nop
  1b:	e9 bd fc ff ff       	jmp    0xfffffffffffffcdd
  20:	90                   	nop
  21:	0f 0b                	ud2
  23:	90                   	nop
  24:	e9 57 fa ff ff       	jmp    0xfffffffffffffa80
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 65 fa ff ff       	jmp    0xfffffffffffffa97
  32:	4c 8b 74 24 20       	mov    0x20(%rsp),%r14
  37:	4c 8b 6c 24 28       	mov    0x28(%rsp),%r13
  3c:	4d 89 fa             	mov    %r15,%r10
  3f:	45                   	rex.RB

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 65 fa ff ff       	jmp    0xfffffffffffffa6d
   8:	4c 8b 74 24 20       	mov    0x20(%rsp),%r14
   d:	4c 8b 6c 24 28       	mov    0x28(%rsp),%r13
  12:	4d 89 fa             	mov    %r15,%r10
  15:	45                   	rex.RB
[  575.130949][    C0] RSP: 0018:ffa0000000007868 EFLAGS: 00010293
[  575.131151][    C0] RAX: ff1100002723b4e4 RBX: ff1100000d63b700 RCX: 0000000000000000
[  575.131359][    C0] RDX: ff1100002723b500 RSI: ff1100002723b4ec RDI: fffffffffffffff8
[  575.131576][    C0] RBP: ff1100002723b4c0 R08: ff1100002723b4ec R09: 0000000000000000
[  575.131788][    C0] R10: ff1100000d63b7b8 R11: 0000000000000001 R12: 0000000000000000
[  575.131996][    C0] R13: ff1100000d63b7c8 R14: ff1100000d63b7b6 R15: ff1100001a2b8040
[  575.132202][    C0] FS:  0000000000000000(0000) GS:ff110000c5ed4000(0000) knlGS:0000000000000000
[  575.132588][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  575.132762][    C0] CR2: 00007fc3cf81f574 CR3: 000000004854e002 CR4: 0000000000771ef0
[  575.132972][    C0] PKRU: 55555554
[  575.133078][    C0] Call Trace:
[  575.133182][    C0]  <IRQ>
[  575.133258][    C0]  udp_err (net/ipv4/udp.c:933)
[  575.133368][    C0]  icmp_unreach (net/ipv4/icmp.c:1196)
[  575.133506][    C0]  ? __skb_checksum_complete (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:170 ./include/linux/skbuff.h:2112 net/core/skbuff.c:3785)
[  575.133654][    C0]  icmp_rcv (net/ipv4/icmp.c:1525 (discriminator 1))
[  575.133759][    C0]  ip_protocol_deliver_rcu (net/ipv4/ip_input.c:209)
[  575.133904][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[  575.134043][    C0]  ip_local_deliver_finish (./include/linux/rcupdate.h:867 net/ipv4/ip_input.c:242)
[  575.134181][    C0]  ip_local_deliver (net/ipv4/ip_input.c:259)
[  575.134319][    C0]  ? ip_local_deliver_finish (net/ipv4/ip_input.c:251)
[  575.134457][    C0]  ? ip_rcv_finish_core (net/ipv4/ip_input.c:409 (discriminator 1))
[  575.134602][    C0]  ? do_xdp_generic (net/core/dev.c:5979)
[  575.134742][    C0]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[  575.134879][    C0]  ip_rcv (./include/linux/netfilter.h:318 ./include/linux/netfilter.h:312 net/ipv4/ip_input.c:612)
[  575.134983][    C0]  ? ip_local_deliver (net/ipv4/ip_input.c:605)
[  575.135118][    C0]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 3) kernel/locking/lockdep.c:3821 (discriminator 3) kernel/locking/lockdep.c:3876 (discriminator 3))
[  575.135256][    C0]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2375 (discriminator 2))
[  575.135394][    C0]  ? mark_usage (kernel/locking/lockdep.c:4674 (discriminator 1))
[  575.135534][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  575.135676][    C0]  ? netif_close_many (./include/linux/list.h:127 ./include/linux/list.h:223 ./include/linux/list.h:295 net/core/dev.c:1799)
[  575.135814][    C0]  __netif_receive_skb_one_core (net/core/dev.c:6202)
[  575.135985][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  575.136121][    C0]  ? __netif_receive_skb_list_core (net/core/dev.c:6202)
[  575.136290][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  575.136431][    C0]  process_backlog (./include/linux/rcupdate.h:867 net/core/dev.c:6674)
[  575.136578][    C0]  __napi_poll (net/core/dev.c:7737)
[  575.136683][    C0]  net_rx_action (net/core/dev.c:7800 net/core/dev.c:7957)
[  575.136821][    C0]  ? __napi_poll (net/core/dev.c:7919)
[  575.136957][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  575.137102][    C0]  ? __run_timers (kernel/time/timer.c:2402)
[  575.137238][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  575.137373][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  575.137509][    C0]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  575.137656][    C0]  ? _local_bh_enable (kernel/softirq.c:580)
[  575.137793][    C0]  ? _local_bh_enable (kernel/softirq.c:580)
[  575.137932][    C0]  do_softirq (kernel/softirq.c:523 (discriminator 19) kernel/softirq.c:510 (discriminator 19))
[  575.138036][    C0]  </IRQ>
[  575.138106][    C0]  <TASK>
[  575.138176][    C0]  ? __dev_queue_xmit (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:909 (discriminator 2) net/core/dev.c:4905 (discriminator 2))
[  575.138313][    C0]  __local_bh_enable_ip (kernel/softirq.c:450)
[  575.138448][    C0]  __dev_queue_xmit (net/core/dev.c:4906)
[  575.138642][    C0]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  575.138781][    C0]  ? netdev_core_pick_tx (net/core/dev.c:4767)
[  575.138919][    C0]  ? __asan_memcpy (mm/kasan/shadow.c:105 (discriminator 3))
[  575.139057][    C0]  ? eth_header (net/ethernet/eth.c:100)
[  575.139196][    C0]  ? neigh_connected_output (./include/linux/netdevice.h:3458 net/core/neighbour.c:1643)
[  575.139336][    C0]  ip6_finish_output2 (net/ipv6/ip6_output.c:61)
[  575.139477][    C0]  ? ip6_xmit (net/ipv6/ip6_output.c:61)
[  575.139621][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  575.139757][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  575.139892][    C0]  ? ip6_mtu (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) ./include/net/ip6_route.h:382 (discriminator 2) net/ipv6/route.c:3281 (discriminator 2))
[  575.139998][    C0]  ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)
[  575.140136][    C0]  ip6_output (./include/linux/netfilter.h:307 net/ipv6/ip6_output.c:246)
[  575.140241][    C0]  ? ip6_finish_output (net/ipv6/ip6_output.c:227)
[  575.140377][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  575.140515][    C0]  ? xfrm_bundle_lookup.constprop.0 (net/xfrm/xfrm_policy.c:3177)
[  575.140698][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  575.140837][    C0]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  575.140974][    C0]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  575.141114][    C0]  ? icmp6_dst_alloc (net/ipv6/route.c:3357 (discriminator 1))
[  575.141252][    C0]  mld_sendpack (./include/linux/netfilter.h:319 ./include/linux/netfilter.h:312 net/ipv6/mcast.c:1855)
[  575.141392][    C0]  ? nf_hook.constprop.0 (net/ipv4/ip_forward.c:66)
[  575.141539][    C0]  mld_dad_work (net/ipv6/mcast.c:2295)
[  575.141685][    C0]  ? process_one_work (kernel/workqueue.c:3264 (discriminator 2))
[  575.141826][    C0]  process_one_work (kernel/workqueue.c:3293)
[  575.141967][    C0]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3189)
[  575.142103][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  575.142245][    C0]  worker_thread (kernel/workqueue.c:3365 (discriminator 5) kernel/workqueue.c:3452 (discriminator 5))
[  575.142384][    C0]  ? rescuer_thread (kernel/workqueue.c:3398)
[  575.142525][    C0]  ? __kthread_parkme (./arch/x86/include/asm/bitops.h:202 (discriminator 1) ./arch/x86/include/asm/bitops.h:232 (discriminator 1) ./include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 1) kernel/kthread.c:272 (discriminator 1))
[  575.142670][    C0]  ? rescuer_thread (kernel/workqueue.c:3398)
[  575.142805][    C0]  kthread (kernel/kthread.c:436)
[  575.142908][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 24))
[  575.143081][    C0]  ? kthread_affine_node (kernel/kthread.c:381)
[  575.143220][    C0]  ret_from_fork (arch/x86/kernel/process.c:164)
[  575.143359][    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  575.143534][    C0]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 (discriminator 1) arch/x86/kernel/process_64.c:377 (discriminator 1) arch/x86/kernel/process_64.c:665 (discriminator 1))
[  575.143679][    C0]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
__udp4_lib_err_encap:udp_err:icmp_unreach:icmp_rcv:ip_protocol_deliver_rcu