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
------------[ cut here ]------------
batman_adv: batadv0: Interface activated: batadv_slave_1
kernel BUG at include/linux/skbuff.h:2149!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 9623 Comm: syz-executor.3 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888099f085c0 task.stack: ffff88809a7f0000
RIP: 0010:__skb_pull include/linux/skbuff.h:2149 [inline]
RIP: 0010:skb_pull_inline include/linux/skbuff.h:2155 [inline]
RIP: 0010:skb_pull net/core/skbuff.c:1744 [inline]
RIP: 0010:skb_pull+0xb9/0xf0 net/core/skbuff.c:1742
RSP: 0018:ffff88809a7f72e8 EFLAGS: 00010287
RAX: 0000000000000fde RBX: ffff88809e223000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: 0000000000000018 RDI: ffff88809e223084
RBP: ffff88809a7f72f8 R08: ffff88809e2230d8 R09: ffff88809e2230d0
R10: ffff88809151d554 R11: ffff888099f085c0 R12: ffff88809151ca00
R13: 0000000000000080 R14: ffff88809af5c3a0 R15: 0000000000000000
FS:  00007f9068922700(0000) GS:ffff8880ba600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9068922718 CR3: 000000009ae08000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ipgre_xmit+0x24a/0x760 net/ipv4/ip_gre.c:658
 __netdev_start_xmit include/linux/netdevice.h:4051 [inline]
 netdev_start_xmit include/linux/netdevice.h:4060 [inline]
 xmit_one net/core/dev.c:3005 [inline]
 dev_hard_start_xmit+0x15e/0x780 net/core/dev.c:3021
 __dev_queue_xmit+0x1d8b/0x25b0 net/core/dev.c:3521
 dev_queue_xmit+0xb/0x10 net/core/dev.c:3554
 packet_snd.isra.30+0x9ad/0x2aa0 net/packet/af_packet.c:3024
 packet_sendmsg+0x10c9/0x2da0 net/packet/af_packet.c:3049
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:656
 kernel_sendmsg+0x26/0x30 net/socket.c:664
 sock_no_sendpage+0xf7/0x130 net/core/sock.c:2595
 kernel_sendpage+0x60/0xd0 net/socket.c:3407
 sock_sendpage+0x6d/0xd0 net/socket.c:871
 pipe_to_sendpage+0x206/0x420 fs/splice.c:451
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x2cb/0x720 fs/splice.c:626
 splice_from_pipe+0xb5/0x110 fs/splice.c:661
 generic_splice_sendpage+0x10/0x20 fs/splice.c:832
 do_splice_from fs/splice.c:851 [inline]
 do_splice fs/splice.c:1147 [inline]
 SYSC_splice fs/splice.c:1402 [inline]
 SyS_splice+0x6f1/0x1590 fs/splice.c:1382
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465b09
RSP: 002b:00007f9068922188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000004b069f R08: 000000000004ffe0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffe98fad77f R14: 00007f9068922300 R15: 0000000000022000
Code: ea 03 80 3c 02 00 75 48 48 8b 83 d8 00 00 00 89 f6 48 01 f0 48 89 83 d8 00 00 00 48 83 c4 08 5b 5d c3 48 83 c4 08 31 c0 5b 5d c3 <0f> 0b 89 75 f4 e8 9d b9 b5 fb 8b 75 f4 e9 66 ff ff ff 89 75 f0 
RIP: __skb_pull include/linux/skbuff.h:2149 [inline] RSP: ffff88809a7f72e8
RIP: skb_pull_inline include/linux/skbuff.h:2155 [inline] RSP: ffff88809a7f72e8
RIP: skb_pull net/core/skbuff.c:1744 [inline] RSP: ffff88809a7f72e8
RIP: skb_pull+0xb9/0xf0 net/core/skbuff.c:1742 RSP: ffff88809a7f72e8
---[ end trace ef2351279c7fa755 ]---