RBP: 00007f005761ba90 R08: 0000000000000014 R09: 0000000000000000
R10: 0000000020d2c000 R11: 0000000000000212 R12: 00000000004b767a
R13: 00007f005761bbc8 R14: 00000000004b767a R15: 0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 28951 Comm: syz-executor5 Not tainted 4.15.0-rc5+ #179
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fib6_add+0x730/0x13b0 net/ipv6/ip6_fib.c:1246
RSP: 0018:ffff8801c268f238 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000fffffff4 RCX: ffffffff84b8581f
RDX: 0000000000000004 RSI: ffffc90003f77000 RDI: 0000000000000282
RBP: ffff8801c268f568 R08: 1ffff100384d1d5e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000002e
FS:  00007f005761c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004d4344 CR3: 00000001c8202004 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __ip6_ins_rt+0x6c/0x90 net/ipv6/route.c:1013
 ip6_ins_rt+0x244/0x370 net/ipv6/route.c:1026
 __ipv6_dev_ac_inc+0x511/0x780 net/ipv6/anycast.c:286
 ipv6_sock_ac_join+0x479/0x7a0 net/ipv6/anycast.c:126
 do_ipv6_setsockopt.isra.9+0x30cd/0x39a0 net/ipv6/ipv6_sockglue.c:662
 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922
 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978
 SYSC_setsockopt net/socket.c:1821 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1800
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f005761bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f005761baa0 RCX: 0000000000452ac9
RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000013
RBP: 00007f005761ba90 R08: 0000000000000014 R09: 0000000000000000
R10: 0000000020d2c000 R11: 0000000000000212 R12: 00000000004b767a
R13: 00007f005761bbc8 R14: 00000000004b767a R15: 0000000000000000
Code: 17 b3 b7 fc e8 72 f7 a3 fc 85 c0 0f 85 b6 02 00 00 4d 8d 66 20 e8 01 b3 b7 fc 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 39 09 00 00 4d 39 f5 4d 8b 7e 20 0f 95 c0 4c 
RIP: fib6_add+0x730/0x13b0 net/ipv6/ip6_fib.c:1246 RSP: ffff8801c268f238
---[ end trace 237601f743f4a26f ]---
Kernel panic - not syncing: Fatal exception in interrupt
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..