IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
skbuff: skb_over_panic: text:ffffffff864c972d len:232 put:72 head:ffff88809eb20280 data:ffff88809eb20280 tail:0xe8 end:0xc0 dev:<NULL>
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
Modules linked in:
CPU: 0 PID: 9387 Comm: syz-executor.4 Not tainted 4.14.217-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809eff6380 task.stack: ffff8880a0648000
RIP: 0010:skb_panic+0x172/0x174 net/core/skbuff.c:104
RSP: 0018:ffff8880a064f1c8 EFLAGS: 00010282
RAX: 0000000000000086 RBX: ffff88808ffb75c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bbb40 RDI: ffffed10140c9e2f
RBP: ffffffff885550a0 R08: 0000000000000086 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff864c972d
R13: 0000000000000048 R14: ffffffff88554900 R15: 00000000000000c0
FS:  00007f48d9e48700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000074b1a8 CR3: 0000000091cbd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1704
 dump_esp_combs net/key/af_key.c:3010 [inline]
 pfkey_send_acquire+0x161d/0x2360 net/key/af_key.c:3231
 km_query+0xa9/0x1b0 net/xfrm/xfrm_state.c:1982
 xfrm_state_find+0x1847/0x27c0 net/xfrm/xfrm_state.c:1026
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1389 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1433 [inline]
 xfrm_resolve_and_create_bundle+0x29b/0x2630 net/xfrm/xfrm_policy.c:1725
 xfrm_lookup+0x1ee/0x1790 net/xfrm/xfrm_policy.c:2035
 xfrm_lookup_route+0x33/0x1b0 net/xfrm/xfrm_policy.c:2154
 ip_route_output_flow+0xf9/0x130 net/ipv4/route.c:2608
 udp_sendmsg+0x13b5/0x1c80 net/ipv4/udp.c:1025
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x326/0x800 net/socket.c:2062
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_1
 __sys_sendmmsg+0x129/0x330 net/socket.c:2152
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x2f/0x50 net/socket.c:2178
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e219
RSP: 002b:00007f48d9e47c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219
RDX: 000000000800001d RSI: 0000000020007fc0 RDI: 0000000000000003
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
RBP: 000000000119c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007ffde72c83bf R14: 00007f48d9e489c0 R15: 000000000119c034
Code: 
device veth0_macvtap entered promiscuous mode
8b 4c 24 10 8b 8b 80 00 00 
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
00 41 56 45 89 e8 4c 89 e2 41 57 48 
device veth1_macvtap entered promiscuous mode
89 ee 48 c7 c7 40 49 55 88 ff 74 24 10 ff 74 24 20 e8 9b 73 e4 ff <0f> 0b 
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
e8 30 29 3a fa 4c 
IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready
8b 64 24 18 e8 36 
IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready
8d 63 fa 48 c7 c1 60 
RIP: skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: ffff8880a064f1c8
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
---[ end trace 8350a35a50e99b59 ]---
Bluetooth: hci2 command 0x0419 tx timeout