======================================
| [   45.270812][  T392] Mirror/redirect action on
| [   58.884448][    C2] ------------[ cut here ]------------
| [   58.884820][    C2] UBSAN: invalid-load in ./include/linux/skbuff.h:4267:9
| [   58.885195][    C2] load of value 107 is not a valid value for type '_Bool'
[   58.885959][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   58.886583][    C2] Call Trace:
[   58.886758][    C2]  <IRQ>
[ 58.886909][ C2] dump_stack_lvl (lib/dump_stack.c:107) 
[ 58.887150][ C2] __ubsan_handle_load_invalid_value (lib/ubsan.c:218 lib/ubsan.c:419) 

DETECTED CRASH, lowering timeout
[ 58.887621][ C2] br_forward_finish.cold (./include/linux/spinlock.h:396 net/bridge/br.c:81) bridge
[ 58.888124][ C2] br_dev_xmit (net/bridge/br_device.c:102) bridge
[ 58.888447][ C2] ? __pfx_br_dev_xmit (net/bridge/br_device.c:29) bridge
[ 58.888774][ C2] ? debug_mutex_wake_waiter (kernel/locking/mutex-debug.c:38) 
[ 58.889064][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 58.889346][ C2] ? __pfx_packet_rcv (net/packet/af_packet.c:2124) 
[ 58.889598][ C2] ? dev_queue_xmit_nit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/dev.c:2299) 
[ 58.889866][ C2] ? __pfx_qdisc_pkt_len_init (net/core/dev.c:3679) 
[ 58.890154][ C2] ? dev_queue_xmit_nit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/dev.c:2299) 
[ 58.890435][ C2] dev_hard_start_xmit (./include/linux/netdevice.h:4991 ./include/linux/netdevice.h:5005 net/core/dev.c:3530 net/core/dev.c:3546) 
[ 58.890709][ C2] __dev_queue_xmit (./include/linux/netdevice.h:3369 net/core/dev.c:4338) 
[ 58.890964][ C2] ? __pfx_do_raw_write_trylock (kernel/locking/spinlock_debug.c:216) 
[ 58.891300][ C2] ? eth_header (net/ethernet/eth.c:100) 
[ 58.891551][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4246) 
[ 58.891836][ C2] ? neigh_resolve_output (./include/linux/netdevice.h:3226 net/core/neighbour.c:1558 net/core/neighbour.c:1543) 
[ 58.892117][ C2] ? __neigh_update (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/neighbour.c:1446) 
[ 58.892389][ C2] __neigh_update (net/core/neighbour.c:1461) 
[ 58.892656][ C2] arp_process (./include/linux/instrumented.h:96 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:400 (discriminator 4) ./include/linux/refcount.h:261 (discriminator 4) ./include/linux/refcount.h:304 (discriminator 4) ./include/linux/refcount.h:322 (discriminator 4) ./include/net/neighbour.h:444 (discriminator 4) net/ipv4/arp.c:934 (discriminator 4)) 
[ 58.892901][ C2] ? __pfx_arp_process (net/ipv4/arp.c:699) 
[ 58.893169][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 58.893450][ C2] ? __pfx_arp_rcv (net/ipv4/arp.c:965) 
[ 58.893689][ C2] __netif_receive_skb_one_core (net/core/dev.c:5554 (discriminator 5)) 
[ 58.893991][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5547) 
[ 58.894330][ C2] ? br_vlan_lookup (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/rhashtable.h:673 net/bridge/br_vlan.c:34) bridge
[ 58.894663][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 58.894902][ C2] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5741 (discriminator 16)) 
[ 58.895212][ C2] netif_receive_skb_internal (net/core/dev.c:5754) 
[ 58.895514][ C2] ? __pfx_netif_receive_skb_internal (net/core/dev.c:5733) 
[ 58.895837][ C2] ? br_handle_vlan (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 net/bridge/br_private.h:754 net/bridge/br_vlan.c:505) bridge
[ 58.896173][ C2] netif_receive_skb (net/core/dev.c:5813) 
[ 58.896434][ C2] br_handle_frame_finish (net/bridge/br_input.c:216) bridge
[ 58.896797][ C2] ? __pfx_br_handle_frame_finish (net/bridge/br_input.c:75) bridge
[ 58.897169][ C2] ? __lock_release (kernel/locking/lockdep.c:347 kernel/locking/lockdep.c:5436) 
[ 58.897431][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 58.897718][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 58.897997][ C2] ? sock_def_readable (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/sock.c:3357) 
[ 58.898284][ C2] br_handle_frame (net/bridge/br_input.c:417) bridge
[ 58.898609][ C2] ? __pfx_br_handle_frame (net/bridge/br_input.c:321) bridge
[ 58.898954][ C2] ? __pfx_packet_rcv (net/packet/af_packet.c:2124) 
[ 58.899209][ C2] __netif_receive_skb_core.constprop.0 (net/core/dev.c:5448) 
[ 58.899583][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 58.899814][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 58.900071][ C2] ? __pfx___netif_receive_skb_core.constprop.0 (net/core/dev.c:5341) 
[ 58.900453][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 58.900719][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5995) 
[ 58.900981][ C2] __netif_receive_skb_one_core (net/core/dev.c:5553) 
[ 58.901290][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5547) 
[ 58.901619][ C2] ? __pfx_do_raw_spin_trylock (kernel/locking/spinlock_debug.c:122) 
[ 58.901921][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 58.902163][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5995) 
[ 58.902433][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5997) 
[ 58.902677][ C2] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 58.902919][ C2] __napi_poll.constprop.0 (net/core/dev.c:6625) 
[ 58.903200][ C2] net_rx_action (net/core/dev.c:6694 net/core/dev.c:6827) 
[ 58.903471][ C2] ? __pfx_net_rx_action (net/core/dev.c:6791) 
[ 58.903756][ C2] __do_softirq (kernel/softirq.c:553) 
[ 58.903998][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4364) 
[ 58.904267][ C2] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   58.904485][    C2]  </IRQ>
[   58.904637][    C2]  <TASK>
[ 58.904793][ C2] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 58.905056][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4364) 
[ 58.905319][ C2] __dev_queue_xmit (net/core/dev.c:4365) 
[ 58.905576][ C2] ? packet_parse_headers (./include/linux/skbuff.h:2999 net/packet/af_packet.c:1944) 
[ 58.905851][ C2] ? packet_parse_headers (./include/linux/skbuff.h:2999 net/packet/af_packet.c:1944) 
[ 58.906135][ C2] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2767) 
[ 58.906432][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4246) 
[ 58.906711][ C2] ? dev_get_by_index (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/dev.c:860) 
[ 58.906978][ C2] packet_snd (net/packet/af_packet.c:3084) 
[ 58.907221][ C2] ? __lock_release (kernel/locking/lockdep.c:353 kernel/locking/lockdep.c:5436) 
[ 58.907473][ C2] ? __pfx_packet_snd (net/packet/af_packet.c:2946) 
[ 58.907735][ C2] ? __might_fault (mm/memory.c:6060 mm/memory.c:6053) 
[ 58.907996][ C2] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 58.908235][ C2] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 58.908534][ C2] ? sock_ioctl (net/socket.c:1344) 
[ 58.908775][ C2] ? rseq_ip_fixup (kernel/rseq.c:257 kernel/rseq.c:291) 
[ 58.909023][ C2] ? __pfx_find_vma (mm/mmap.c:1883) 
[ 58.909268][ C2] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 58.909516][ C2] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) 
[ 58.909792][ C2] __x64_sys_sendto (net/socket.c:2199) 
[ 58.910041][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 58.910380][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 58.910618][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   58.910922][    C2] RIP: 0033:0x7f496d13385a
[ 58.911155][ C2] 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
[   58.912132][    C2] RSP: 002b:00007fff717987e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   58.912556][    C2] RAX: ffffffffffffffda RBX: 00000000017559d0 RCX: 00007f496d13385a
[   58.912957][    C2] RDX: 000000000000002a RSI: 0000000001755c92 RDI: 0000000000000005
[   58.913356][    C2] RBP: 0000000001755c92 R08: 00007fff717987f0 R09: 0000000000000014
[   58.913755][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
dump_stack_lvl:__ubsan_handle_load_invalid_value:br_dev_xmit:dev_hard_start_xmit