======================================
| [  430.319868][   T46] br0: port 1(swp1) entered forwarding state
| [  430.362113][    C1] ------------[ cut here ]------------
| [  430.362298][    C1] WARNING: ./include/linux/skbuff.h:3239 at __udp4_lib_err_encap+0x69a/0xad0, CPU#1: 2/1148
| [  430.362678][    C1] Modules linked in: act_gact cls_flower sch_ingress vxlan unix_diag chacha libchacha chacha20poly1305 libpoly1305 tls geneve
[  430.363287][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  430.363453][    C1] Workqueue: mld mld_ifc_work
[  430.363598][    C1] 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))
[  430.363761][    C1] 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
[  430.364208][    C1] RSP: 0018:ffa00000001d0868 EFLAGS: 00010293
[  430.364387][    C1] RAX: ff1100000f483864 RBX: ff1100000be59c40 RCX: 0000000000000000
[  430.364585][    C1] RDX: ff1100000f483880 RSI: ff1100000f48386c RDI: fffffffffffffff8
[  430.364772][    C1] RBP: ff1100000f483840 R08: ff1100000f48386c R09: 0000000000000000
[  430.364957][    C1] R10: ff1100000be59cf8 R11: 0000000000000001 R12: 0000000000000000
[  430.365221][    C1] R13: ff1100000be59d08 R14: ff1100000be59cf6 R15: ff1100000f6bdd40
[  430.365419][    C1] FS:  0000000000000000(0000) GS:ff110000d9b54000(0000) knlGS:0000000000000000
[  430.365644][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.365800][    C1] CR2: 00007f3b7b793574 CR3: 000000004d74e004 CR4: 0000000000771ef0
[  430.365985][    C1] PKRU: 55555554
[  430.366079][    C1] Call Trace:
[  430.366173][    C1]  <IRQ>
[  430.366243][    C1]  udp_err (net/ipv4/udp.c:933)
[  430.366347][    C1]  icmp_unreach (net/ipv4/icmp.c:1196)
[  430.366471][    C1]  ? __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)
[  430.366604][    C1]  icmp_rcv (net/ipv4/icmp.c:1525 (discriminator 1))
[  430.366698][    C1]  ip_protocol_deliver_rcu (net/ipv4/ip_input.c:209)
[  430.366823][    C1]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[  430.366946][    C1]  ip_local_deliver_finish (./include/linux/rcupdate.h:867 net/ipv4/ip_input.c:242)
[  430.367070][    C1]  ip_local_deliver (net/ipv4/ip_input.c:259)
[  430.367194][    C1]  ? ip_local_deliver_finish (net/ipv4/ip_input.c:251)
[  430.367317][    C1]  ? ip_rcv_finish_core (net/ipv4/ip_input.c:409 (discriminator 1))
[  430.367446][    C1]  ? do_xdp_generic (net/core/dev.c:5979)
[  430.367578][    C1]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[  430.367700][    C1]  ip_rcv (./include/linux/netfilter.h:318 ./include/linux/netfilter.h:312 net/ipv4/ip_input.c:612)
[  430.367794][    C1]  ? ip_local_deliver (net/ipv4/ip_input.c:605)
[  430.367916][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 3) kernel/locking/lockdep.c:3821 (discriminator 3) kernel/locking/lockdep.c:3876 (discriminator 3))
[  430.368042][    C1]  ? handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  430.368165][    C1]  ? __irq_exit_rcu (kernel/softirq.c:496 (discriminator 1) kernel/softirq.c:735 (discriminator 1))
[  430.368289][    C1]  ? irq_exit_rcu (kernel/softirq.c:754)
[  430.368417][    C1]  ? mark_usage (kernel/locking/lockdep.c:4674 (discriminator 1))
[  430.368546][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  430.368669][    C1]  ? netif_close_many (./include/linux/list.h:127 ./include/linux/list.h:223 ./include/linux/list.h:295 net/core/dev.c:1799)
[  430.368792][    C1]  __netif_receive_skb_one_core (net/core/dev.c:6202)
[  430.368948][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  430.369072][    C1]  ? __netif_receive_skb_list_core (net/core/dev.c:6202)
[  430.369225][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  430.369358][    C1]  process_backlog (./include/linux/rcupdate.h:867 net/core/dev.c:6674)
[  430.369484][    C1]  __napi_poll (net/core/dev.c:7737)
[  430.369584][    C1]  net_rx_action (net/core/dev.c:7800 net/core/dev.c:7957)
[  430.369709][    C1]  ? __napi_poll (net/core/dev.c:7919)
[  430.369832][    C1]  ? reacquire_held_locks (kernel/locking/lockdep.c:238 (discriminator 12) kernel/locking/lockdep.c:227 (discriminator 12) kernel/locking/lockdep.c:5386 (discriminator 12))
[  430.369954][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  430.370077][    C1]  ? 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)
[  430.370200][    C1]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 4) kernel/locking/spinlock.c:198 (discriminator 4))
[  430.370363][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 11) kernel/locking/lockdep.c:4411 (discriminator 11))
[  430.370515][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[  430.370643][    C1]  ? raise_softirq (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 kernel/softirq.c:796)
[  430.370767][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  430.370891][    C1]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  430.371014][    C1]  ? _local_bh_enable (kernel/softirq.c:580)
[  430.371136][    C1]  ? _local_bh_enable (kernel/softirq.c:580)
[  430.371262][    C1]  do_softirq (kernel/softirq.c:523 (discriminator 19) kernel/softirq.c:510 (discriminator 19))
[  430.371360][    C1]  </IRQ>
[  430.371424][    C1]  <TASK>
[  430.371485][    C1]  ? __dev_queue_xmit (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:909 (discriminator 2) net/core/dev.c:4905 (discriminator 2))
[  430.371622][    C1]  __local_bh_enable_ip (kernel/softirq.c:450)
[  430.371751][    C1]  __dev_queue_xmit (net/core/dev.c:4906)
[  430.371877][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  430.372003][    C1]  ? netdev_core_pick_tx (net/core/dev.c:4767)
[  430.372127][    C1]  ? __asan_memcpy (mm/kasan/shadow.c:105 (discriminator 3))
[  430.372252][    C1]  ? eth_header (net/ethernet/eth.c:100)
[  430.372382][    C1]  ? neigh_connected_output (./include/linux/netdevice.h:3458 net/core/neighbour.c:1643)
[  430.372509][    C1]  ip6_finish_output2 (net/ipv6/ip6_output.c:61)
[  430.372641][    C1]  ? ip6_xmit (net/ipv6/ip6_output.c:61)
[  430.372765][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  430.372888][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  430.373011][    C1]  ? 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))
[  430.373107][    C1]  ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)
[  430.373232][    C1]  ip6_output (./include/linux/netfilter.h:307 net/ipv6/ip6_output.c:246)
[  430.373329][    C1]  ? ip6_finish_output (net/ipv6/ip6_output.c:227)
[  430.373453][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  430.373583][    C1]  ? xfrm_bundle_lookup.constprop.0 (net/xfrm/xfrm_policy.c:3177)
[  430.373736][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  430.373859][    C1]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  430.373980][    C1]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[  430.374102][    C1]  ? icmp6_dst_alloc (net/ipv6/route.c:3357 (discriminator 1))
[  430.374227][    C1]  mld_sendpack (./include/linux/netfilter.h:319 ./include/linux/netfilter.h:312 net/ipv6/mcast.c:1855)
[  430.374358][    C1]  ? nf_hook.constprop.0 (net/ipv4/ip_forward.c:66)
[  430.374486][    C1]  ? mld_send_cr (net/ipv6/mcast.c:2131 (discriminator 14))
[  430.374618][    C1]  mld_ifc_work (net/ipv6/mcast.c:2695)
[  430.374740][    C1]  ? process_one_work (kernel/workqueue.c:3264 (discriminator 2))
[  430.374865][    C1]  process_one_work (kernel/workqueue.c:3293)
[  430.374990][    C1]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3189)
[  430.375112][    C1]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  430.375238][    C1]  worker_thread (kernel/workqueue.c:3365 (discriminator 5) kernel/workqueue.c:3452 (discriminator 5))
[  430.375367][    C1]  ? rescuer_thread (kernel/workqueue.c:3398)
[  430.375489][    C1]  ? __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))
[  430.375618][    C1]  ? rescuer_thread (kernel/workqueue.c:3398)
[  430.375740][    C1]  kthread (kernel/kthread.c:436)
[  430.375936][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 24))
[  430.376089][    C1]  ? kthread_affine_node (kernel/kthread.c:381)
[  430.376213][    C1]  ret_from_fork (arch/x86/kernel/process.c:164)
[  430.376344][    C1]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  430.376594][    C1]  ? __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))
[  430.376718][    C1]  ? kthread_affine_node (kernel/kthread.c:381)


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