------------[ cut here ]------------
WARNING: CPU: 1 PID: 3329 at net/ipv6/ip6_fib.c:1137 fib6_add+0x20d9/0x2c10
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3329 Comm: syz-executor2 Not tainted 4.14.0-rc4+ #80
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 dump_stack+0x194/0x257
 panic+0x1e4/0x417
 __warn+0x1c4/0x1d9
 report_bug+0x211/0x2d0
 fixup_bug+0x40/0x90
 do_trap+0x260/0x390
 do_error_trap+0x120/0x390
 do_invalid_op+0x1b/0x20
 invalid_op+0x18/0x20
RIP: 0010:fib6_add+0x20d9/0x2c10
RSP: 0018:ffff8801d8ab76a0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: 1ffff1003b156eec RCX: ffffc90003774000
RDX: 00000000000001eb RSI: ffffffff843415e9 RDI: ffff8801c43b4240
RBP: ffff8801d8ab7a08 R08: 0000000000000000 R09: ffff8801d8ab7360
R10: ffff8801d8ab72d8 R11: 1ffff100345412eb R12: 0000000000000001
R13: dffffc0000000000 R14: ffff8801c43b41c0 R15: ffff8801c6b681c0
 __ip6_ins_rt+0x6c/0x90
 ip6_route_add+0x148/0x1a0
 ipv6_route_ioctl+0x4d5/0x690
 inet6_ioctl+0xef/0x1e0
 sock_do_ioctl+0x65/0xb0
 sock_ioctl+0x2c2/0x440
 do_vfs_ioctl+0x1b1/0x1530
 SyS_ioctl+0x8f/0xc0
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x452779
RSP: 002b:00007ff13c705be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452779
RDX: 00000000200d0000 RSI: 000000000000890b RDI: 0000000000000014
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007ff13c7069c0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..