======================================
| [  677.607465][ T9458] br1: entered promiscuous mode
| [  677.621938][    C2] ------------[ cut here ]------------
| [  677.622317][    C2] WARNING: ./include/linux/skbuff.h:3239 at __udp6_lib_err_encap+0x614/0x950, CPU#2: 0/12
| [  677.622647][    C2] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel act_mirred cls_matchall ip_gre ip6_gre ip6_tunnel tunnel6 gre act_gact cls_flower dummy sch_ingress bridge stp llc 8021q vrf veth
[  677.623686][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  677.623898][    C2] Workqueue: ipv6_addrconf addrconf_dad_work
[  677.624172][    C2] RIP: 0010:__udp6_lib_err_encap (./include/linux/skbuff.h:3239 (discriminator 3) ./include/linux/skbuff.h:3235 (discriminator 3) net/ipv6/udp.c:652 (discriminator 3))
[  677.624402][    C2] Code: 08 84 d2 0f 85 4f 02 00 00 44 8b 4b 28 e9 a9 fe ff ff 4c 8b 6c 24 20 4c 8b 7c 24 28 45 31 e4 4c 8b 74 24 30 e9 d7 fd ff ff 90 <0f> 0b 90 48 29 c5 48 89 e8 48 81 fd ff ff 00 00 0f 86 ff fa ff ff
All code
========
   0:	08 84 d2 0f 85 4f 02 	or     %al,0x24f850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	44 8b 4b 28          	mov    0x28(%rbx),%r9d
   d:	e9 a9 fe ff ff       	jmp    0xfffffffffffffebb
  12:	4c 8b 6c 24 20       	mov    0x20(%rsp),%r13
  17:	4c 8b 7c 24 28       	mov    0x28(%rsp),%r15
  1c:	45 31 e4             	xor    %r12d,%r12d
  1f:	4c 8b 74 24 30       	mov    0x30(%rsp),%r14
  24:	e9 d7 fd ff ff       	jmp    0xfffffffffffffe00
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 29 c5             	sub    %rax,%rbp
  30:	48 89 e8             	mov    %rbp,%rax
  33:	48 81 fd ff ff 00 00 	cmp    $0xffff,%rbp
  3a:	0f 86 ff fa ff ff    	jbe    0xfffffffffffffb3f

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 29 c5             	sub    %rax,%rbp
   6:	48 89 e8             	mov    %rbp,%rax
   9:	48 81 fd ff ff 00 00 	cmp    $0xffff,%rbp
  10:	0f 86 ff fa ff ff    	jbe    0xfffffffffffffb15
[  677.625100][    C2] RSP: 0018:ffa00000002286a8 EFLAGS: 00010293
[  677.625338][    C2] RAX: ff11000015fc9c40 RBX: ff1100000fe59540 RCX: ff11000015fc9cb0
[  677.625587][    C2] RDX: ff11000015fc9c80 RSI: ff11000015fc9c88 RDI: fffffffffffffff8
[  677.625832][    C2] RBP: ff11000015fc9c88 R08: 1fe2200001fcb2c1 R09: ff1100000fe59540
[  677.626077][    C2] R10: ffffffffbcb35c00 R11: 0000000000000003 R12: 0000000000000000
[  677.626346][    C2] R13: ff1100000fe595f2 R14: ff1100000fe59600 R15: ff1100000fe595f4
[  677.626691][    C2] FS:  0000000000000000(0000) GS:ff1100007a4ab000(0000) knlGS:0000000000000000
[  677.627071][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  677.627399][    C2] CR2: 00007f09dc487574 CR3: 000000002253a005 CR4: 0000000000771ef0
[  677.627651][    C2] PKRU: 55555554
[  677.627799][    C2] Call Trace:
[  677.628033][    C2]  <IRQ>
[  677.628168][    C2]  udpv6_err (net/ipv6/udp.c:714)
[  677.628333][    C2]  ? stack_access_ok (arch/x86/kernel/unwind_orc.c:485)
[  677.628518][    C2]  ? __udp6_lib_err_encap (net/ipv6/udp.c:695)
[  677.628698][    C2]  ? __unwind_start (./arch/x86/include/asm/unwind.h:50 arch/x86/kernel/unwind_orc.c:784)
[  677.628969][    C2]  icmpv6_notify (net/ipv6/icmp.c:1087)
[  677.629231][    C2]  ? icmpv6_param_prob_reason (net/ipv6/icmp.c:1039)
[  677.629424][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  677.629607][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1))
[  677.629880][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  677.630064][    C2]  icmpv6_rcv (net/ipv6/icmp.c:1230)
[  677.630270][    C2]  ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:480)
[  677.630459][    C2]  ip6_input_finish (net/ipv6/ip6_input.c:532)
[  677.630728][    C2]  ip6_input (./include/linux/rcupdate.h:867 net/ipv6/ip6_input.c:543)
[  677.630878][    C2]  ? ip6_input_finish (net/ipv6/ip6_input.c:536)
[  677.631062][    C2]  ? ip6_rcv_core (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) net/ipv6/ip6_input.c:328 (discriminator 2))
[  677.631272][    C2]  ? __asan_memset (mm/kasan/shadow.c:84 (discriminator 2))
[  677.631542][    C2]  ? ip6_rcv_core (./include/net/sock.h:2995 net/ipv6/ip6_input.c:331)
[  677.631725][    C2]  ipv6_rcv (./include/net/dst.h:480 (discriminator 4) net/ipv6/ip6_input.c:119 (discriminator 4) ./include/linux/netfilter.h:318 (discriminator 4) ./include/linux/netfilter.h:312 (discriminator 4) net/ipv6/ip6_input.c:351 (discriminator 4))
[  677.631873][    C2]  ? ip6_rcv_core (net/ipv6/ip6_input.c:345)
[  677.632054][    C2]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 3) kernel/locking/lockdep.c:3821 (discriminator 3) kernel/locking/lockdep.c:3876 (discriminator 3))
[  677.632249][    C2]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2375 (discriminator 2))
[  677.632443][    C2]  ? mark_usage (kernel/locking/lockdep.c:4674 (discriminator 1))
[  677.632623][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  677.632806][    C2]  ? process_backlog (./include/linux/local_lock_internal.h:62 (discriminator 2) net/core/dev.c:6671 (discriminator 2))
[  677.633077][    C2]  __netif_receive_skb_one_core (net/core/dev.c:6202)
[  677.633307][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  677.633490][    C2]  ? __netif_receive_skb_list_core (net/core/dev.c:6202)
[  677.633705][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  677.633977][    C2]  process_backlog (./include/linux/rcupdate.h:867 net/core/dev.c:6674)
[  677.634175][    C2]  __napi_poll (net/core/dev.c:7737)
[  677.634334][    C2]  net_rx_action (net/core/dev.c:7800 net/core/dev.c:7957)
[  677.634522][    C2]  ? __napi_poll (net/core/dev.c:7919)
[  677.634804][    C2]  ? reacquire_held_locks (kernel/locking/lockdep.c:238 (discriminator 12) kernel/locking/lockdep.c:227 (discriminator 12) kernel/locking/lockdep.c:5386 (discriminator 12))
[  677.634983][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5536)
[  677.635184][    C2]  ? 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)
[  677.635373][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 4) kernel/locking/spinlock.c:198 (discriminator 4))
[  677.635679][    C2]  ? __run_timers (kernel/time/timer.c:2402)
[  677.635860][    C2]  ? mark_held_locks (kernel/locking/lockdep.c:4325 (discriminator 1))
[  677.636046][    C2]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  677.636337][    C2]  ? _local_bh_enable (kernel/softirq.c:580)
[  677.636521][    C2]  ? _local_bh_enable (kernel/softirq.c:580)
[  677.636702][    C2]  do_softirq (kernel/softirq.c:523 (discriminator 19) kernel/softirq.c:510 (discriminator 19))
[  677.636850][    C2]  </IRQ>
[  677.636963][    C2]  <TASK>
[  677.637076][    C2]  __local_bh_enable_ip (kernel/softirq.c:450)
[  677.637363][    C2]  addrconf_dad_work (net/ipv6/addrconf.c:4249)
[  677.637547][    C2]  ? addrconf_dad_begin (net/ipv6/addrconf.c:4189)
[  677.637729][    C2]  ? process_one_work (kernel/workqueue.c:3264 (discriminator 2))
[  677.637913][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  677.638193][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  677.638384][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 24) kernel/locking/lockdep.c:5831 (discriminator 24))
[  677.638566][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  677.638746][    C2]  process_one_work (kernel/workqueue.c:3293)
[  677.639015][    C2]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3189)
[  677.639213][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:5870 (discriminator 2))
[  677.639411][    C2]  worker_thread (kernel/workqueue.c:3365 (discriminator 5) kernel/workqueue.c:3452 (discriminator 5))
[  677.639597][    C2]  ? rescuer_thread (kernel/workqueue.c:3398)
[  677.639862][    C2]  kthread (kernel/kthread.c:436)
[  677.640008][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 24))
[  677.640232][    C2]  ? kthread_affine_node (kernel/kthread.c:381)
[  677.640421][    C2]  ret_from_fork (arch/x86/kernel/process.c:164)
[  677.640694][    C2]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[  677.640906][    C2]  ? __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))
[  677.641089][    C2]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
__udp6_lib_err_encap:udpv6_err:icmpv6_notify:icmpv6_rcv:ip6_protocol_deliver_rcu