SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2362 sclass=netlink_route_socket pig=11752 comm=syz-executor6
FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
IP: [<ffffffff836c8bb0>] sock_hold include/net/sock.h:584 [inline]
IP: [<ffffffff836c8bb0>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
PGD 1cfd6b067 [  246.339871] PUD 1d73c3067 
Oops: 0002 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 11724 Comm: syz-executor5 Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019b040000 task.stack: ffff8801c6910000
RIP: 0010:[<ffffffff836c8bb0>]  [<ffffffff836c8bb0>] sock_hold include/net/sock.h:584 [inline]
RIP: 0010:[<ffffffff836c8bb0>]  [<ffffffff836c8bb0>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
RSP: 0018:ffff8801c6917ac0  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801d0631400 RCX: 1ffff1003360811d
RDX: 1ffff10039b7bdc0 RSI: ffff88019b0408c8 RDI: ffff8801cdbdee00
RBP: ffff8801c6917b60 R08: ffff88019b0408e8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cdbdecd8
R13: 0000000000000000 R14: ffff8801cdbdec80 R15: ffff8801c6917c78
FS:  00007f18d9cff700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000001cfb80000 CR4: 00000000001606f0
Stack:
 0000000000000201 ffffffff836c9ec1 ffff8801c6917ae0 ffffffff812383ad
 ffff8801cdbdec80 ffff8801d0631558 ffff8801cdbdecd8 ffff8801d0631550
 ffff8801d06314b0 ffff8801cdbdeca0 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff836cdd67>] pppol2tp_connect+0x10d7/0x18f0 net/l2tp/l2tp_ppp.c:718
 [<ffffffff8301ea38>] SYSC_connect+0x1b8/0x300 net/socket.c:1575
 [<ffffffff83021314>] SyS_connect+0x24/0x30 net/socket.c:1556
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a019d3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 00 00 49 8d be 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 7b 09 00 00 49 8b 86 80 01 00 00 <f0> ff 80 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 55 d0 
RIP  [<ffffffff836c8bb0>] sock_hold include/net/sock.h:584 [inline]
RIP  [<ffffffff836c8bb0>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
 RSP <ffff8801c6917ac0>
CR2: 0000000000000080
---[ end trace a52451fdcee620db ]---