IPVS: Creating netns size=2536 id=178
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 9592 Comm: syz-executor4 Not tainted 4.9.105-gd7e64f8 #43
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801b8cbc800 task.stack: ffff88018ce40000
RIP: 0010:[<ffffffff836c55f7>]  [<ffffffff836c55f7>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff836c55f7>]  [<ffffffff836c55f7>] sk_dst_get include/net/sock.h:1695 [inline]
RIP: 0010:[<ffffffff836c55f7>]  [<ffffffff836c55f7>] pppol2tp_connect+0x857/0x18f0 net/l2tp/l2tp_ppp.c:746
RSP: 0018:ffff88018ce47b60  EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801c54e6500 RCX: ffffc90008358000
RDX: 000000000000003b RSI: ffffffff836c55df RDI: 00000000000001d8
RBP: ffff88018ce47d10 R08: ffff8801b8cbd110 R09: 0000000000000001
R10: ffff8801b8cbc800 R11: 1ffff10037197a1d R12: ffff8801d3882200
R13: 0000000000000000 R14: ffff8801c54e6280 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f5791b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007fe92f004270 CR3: 00000001d44c4000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff836c5580 000000030000001e ffff88018ce47c68 ffff8801c54e6698
 ffff8801d38825d0 ffff8801d3882212 1ffff100319c8f75 ffff8801c54e6400
 ffff8801d3882230 0000000041b58ab3 ffffffff84427730 ffffffff836c4da0
Call Trace:
 [<ffffffff83017958>] SYSC_connect+0x1b8/0x300 net/socket.c:1562
 [<ffffffff8301a224>] SyS_connect+0x24/0x30 net/socket.c:1543
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fb210>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: fd 80 3d 0d 65 58 01 00 0f 84 3e 0b 00 00 e8 d1 98 c9 fd 49 8d bd d8 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 1a 0d 00 00 4d 8b b5 d8 01 00 00 e8 13 6d bb 
RIP  [<ffffffff836c55f7>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff836c55f7>] sk_dst_get include/net/sock.h:1695 [inline]
RIP  [<ffffffff836c55f7>] pppol2tp_connect+0x857/0x18f0 net/l2tp/l2tp_ppp.c:746
 RSP <ffff88018ce47b60>
---[ end trace 40f9a9c5907559d1 ]---