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
Modules linked in:
CPU: 1 PID: 4859 Comm: syz-executor.1 Not tainted 4.14.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805b1201c0 task.stack: ffff8881db940000
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:sk_dst_get include/net/sock.h:1766 [inline]
RIP: 0010:pppol2tp_session_init+0x1ca/0x4d0 net/l2tp/l2tp_ppp.c:616
RSP: 0018:ffff8881db947c50 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888091972900 RCX: ffffc90005aea000
RDX: 0000000000000045 RSI: ffffffff85c11192 RDI: 0000000000000228
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000020012
R10: ffff88805b120a70 R11: ffff88805b1201c0 R12: 00000000000012fb
R13: 0000000000000002 R14: ffff8880a1b68dd2 R15: ffff8880a1b68df0
FS:  00007f021f3b9700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30524000 CR3: 00000000940f8000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 pppol2tp_connect+0xd11/0x1370 net/l2tp/l2tp_ppp.c:790
 SYSC_connect net/socket.c:1655 [inline]
 SyS_connect+0x186/0x260 net/socket.c:1636
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca29
RSP: 002b:00007f021f3b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00000000004db200 RCX: 000000000045ca29
RDX: 000000000000002e RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000008f R14: 00000000004c3466 R15: 00007f021f3b96d4
Code: fb 80 3d eb 5d ac 02 00 0f 84 25 02 00 00 e8 7e 90 99 fb 48 8d bd 28 02 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 db 02 00 00 48 8b ad 28 02 00 00 e8 10 60 8a 
RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff8881db947c50
RIP: sk_dst_get include/net/sock.h:1766 [inline] RSP: ffff8881db947c50
RIP: pppol2tp_session_init+0x1ca/0x4d0 net/l2tp/l2tp_ppp.c:616 RSP: ffff8881db947c50
---[ end trace 1eee792fa287581e ]---