------------[ cut here ]------------
kernel BUG at net/l2tp/l2tp_ppp.c:176!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 9245 Comm: syz-executor7 Not tainted 4.15.0-rc9+ #207
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pppol2tp_sock_to_session net/l2tp/l2tp_ppp.c:176 [inline]
RIP: 0010:pppol2tp_setsockopt+0x294/0x7c0 net/l2tp/l2tp_ppp.c:1383
RSP: 0018:ffff8801bf8c7e10 EFLAGS: 00010216
RAX: 0000000000010000 RBX: 0000000000000000 RCX: ffffffff8506fa74
RDX: 000000000000005b RSI: ffffc900018e8000 RDI: ffff8801c54da380
RBP: ffff8801bf8c7e48 R08: 0000000000000000 R09: 1ffff10037f18f9e
R10: ffff8801bf8c7cb8 R11: 0000000000000000 R12: ffff8801c54da300
R13: 0000000000000002 R14: ffff8801be442600 R15: ffff8801c54da380
FS:  00007f604e13a700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ec2ee8 CR3: 00000001bbc9d004 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 SYSC_setsockopt net/socket.c:1823 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1802
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452f19
RSP: 002b:00007f604e139c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452f19
RDX: 0000000000000002 RSI: 0000000000000111 RDI: 0000000000000013
RBP: 000000000000038e R08: 0000000000000004 R09: 0000000000000000
R10: 0000000020019000 R11: 0000000000000212 R12: 00000000006f45f0
R13: 00000000ffffffff R14: 00007f604e13a6d4 R15: 0000000000000000
Code: 4c 89 e7 e8 af 3b 2b ff bb f7 ff ff ff e9 28 ff ff ff bb f2 ff ff ff e9 1e ff ff ff bb ea ff ff ff e9 14 ff ff ff e8 6c 39 69 fc <0f> 0b e8 65 39 69 fc 49 8d be f8 00 00 00 48 b8 00 00 00 00 00 
RIP: pppol2tp_sock_to_session net/l2tp/l2tp_ppp.c:176 [inline] RSP: ffff8801bf8c7e10
RIP: pppol2tp_setsockopt+0x294/0x7c0 net/l2tp/l2tp_ppp.c:1383 RSP: ffff8801bf8c7e10
---[ end trace 1acde504a0f12570 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..