binder: 26683:26689 transaction failed 29201/-71, size 24-24 line 2921
binder: undelivered TRANSACTION_ERROR: 29201
binder: undelivered TRANSACTION_ERROR: 29201
netlink: 4 bytes leftover after parsing attributes in process `syz-executor2'.
SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pig=26714 comm=syz-executor0
BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
IP: [<ffffffff836c1180>] sock_hold include/net/sock.h:584 [inline]
IP: [<ffffffff836c1180>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
PGD 1d849a067 [  358.075774] PUD 1cd2c0067 
Oops: 0002 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 26729 Comm: syz-executor1 Not tainted 4.9.113-g47bbcd6 #62
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801bd62b000 task.stack: ffff88018fc88000
RIP: 0010:[<ffffffff836c1180>]  [<ffffffff836c1180>] sock_hold include/net/sock.h:584 [inline]
RIP: 0010:[<ffffffff836c1180>]  [<ffffffff836c1180>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
RSP: 0018:ffff88018fc8fac0  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801cfc37180 RCX: 1ffff10037ac571d
RDX: 1ffff10039b03260 RSI: ffff8801bd62b8c8 RDI: ffff8801cd819300
RBP: ffff88018fc8fb60 R08: ffff8801bd62b8e8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cd8191d8
R13: 0000000000000000 R14: ffff8801cd819180 R15: 0000000000000000
FS:  00007f7fa3bef700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 000000018e574000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff836c13f7 ffffffff836c2491 ffff8801a66dee48 0000000000000000
 ffff8801cd819180 ffff8801cfc372d8 ffff8801cd8191d8 ffff8801cfc372d0
 ffff8801cfc37230 ffff8801cd8191a0 ffff8801a66de600 0000000000000000
Call Trace:
 [<ffffffff836c6337>] pppol2tp_connect+0x10d7/0x18f0 net/l2tp/l2tp_ppp.c:718
 [<ffffffff83017958>] SYSC_connect+0x1b8/0x300 net/socket.c:1562
 [<ffffffff8301a224>] SyS_connect+0x24/0x30 net/socket.c:1543
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] 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  [<ffffffff836c1180>] sock_hold include/net/sock.h:584 [inline]
RIP  [<ffffffff836c1180>] l2tp_session_create+0xc60/0x16f0 net/l2tp/l2tp_core.c:1911
 RSP <ffff88018fc8fac0>
CR2: 0000000000000080
---[ end trace 0f7eec30a0c1e815 ]---