netlink_rcv_skb+0x133/0x370 net/netlink/af_netlink.c:2432
------------[ cut here ]------------
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4318
WARNING: CPU: 1 PID: 127 at net/batman-adv/bat_iv_ogm.c:555 batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1785
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x40d/0x5f0 net/netlink/af_netlink.c:1312
Kernel panic - not syncing: panic_on_warn set ...

 netlink_sendmsg+0x730/0xbd0 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:656
 ___sys_sendmsg+0x625/0x920 net/socket.c:2062
 __sys_sendmsg+0xc1/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0xd/0x20 net/socket.c:2103
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x448e09
RSP: 002b:00007fc4468a1cb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc4468a1cc0 RCX: 0000000000448e09
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 0000000000000006 R08: 0000000000000002 R09: 0000000000003131
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc6c
R13: 00007ffd1d75b63f R14: 00007fc4468a29c0 R15: 0000000000000000
CPU: 1 PID: 127 Comm: kworker/u4:3 Not tainted 4.14.164-syzkaller #0
batman_adv: batadv0: Adding interface: syz_tun
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 panic+0x1b0/0x358 kernel/panic.c:183
 __warn.cold.8+0x25/0x2c kernel/panic.c:547
batman_adv: batadv0: The MTU of interface syz_tun is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
 report_bug+0x1a4/0x1f3 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
batman_adv: batadv0: Interface activated: syz_tun
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:555 [inline]
RIP: 0010:batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1797
RSP: 0018:ffff8880a9a37ce8 EFLAGS: 00010286
RAX: ffff888096842000 RBX: ffff888094687548 RCX: 1ffff11013a120c5
RDX: 0000000000000000 RSI: ffffffff87990fa0 RDI: ffff88809d090628
RBP: ffff8880a9a37d60 R08: ffff8880a9a28d48 R09: 0000000000002500
R10: 0000000000000028 R11: ffff8880a9a28480 R12: ffff888087460600
R13: ffff888094687500 R14: ffff88809d0905c0 R15: ffff8880946875e8
 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2114
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2248
 kthread+0x338/0x400 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..