random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
IP: [<ffffffff836c39cc>] l2tp_session_free+0x11c/0x200 net/l2tp/l2tp_core.c:1765
PGD 1cc606067 [   40.895578] PUD 1cb0cc067 
Oops: 0002 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.9.122-g54068d6 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: sock_diag_events sock_diag_broadcast_destroy_work
task: ffff8801d9bcc800 task.stack: ffff8801d9408000
RIP: 0010:[<ffffffff836c39cc>]  [<ffffffff836c39cc>] l2tp_session_free+0x11c/0x200 net/l2tp/l2tp_core.c:1765
RSP: 0018:ffff8801d940fb00  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801b64b1680 RCX: 0000000000000000
RDX: 1ffff10036c960d0 RSI: ffffffff836c39a1 RDI: ffff8801b64b0680
RBP: ffff8801d940fb20 R08: ffff8801d9bcd110 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b64b0500
R13: ffff8801b64b1688 R14: 0000000000000000 R15: ffff8801b64b0558
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000001c9277000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801b64b1728 dffffc0000000000 ffff8801b64b1680 ffffffff836cd810
 ffff8801d940fb78 ffffffff836c4254 ffff8801b64b05d8 ffffed0036c960ab
 ffff8801b64b0558 ffff8801b64b0520 ffff8801b64b0500 ffff8801b6e00680
Call Trace:
 [<ffffffff836c4254>] l2tp_session_dec_refcount_1 net/l2tp/l2tp_core.h:297 [inline]
 [<ffffffff836c4254>] l2tp_tunnel_closeall+0x284/0x350 net/l2tp/l2tp_core.c:1373
 [<ffffffff836c4a82>] l2tp_tunnel_destruct+0x2f2/0x590 net/l2tp/l2tp_core.c:1324
 [<ffffffff830270f5>] __sk_destruct+0x55/0x590 net/core/sock.c:1428
 [<ffffffff8302eb83>] sk_destruct+0x63/0x80 net/core/sock.c:1463
 [<ffffffff830de7da>] sock_diag_broadcast_destroy_work+0x21a/0x390 net/core/sock_diag.c:154
 [<ffffffff8118f421>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff81190216>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119f38d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff83a00e9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: 49 8d bc 24 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 c6 00 00 00 4d 8b b4 24 80 01 00 00 <f0> 41 ff 8e 80 00 00 00 74 69 e8 95 d3 c9 fd 4c 89 ea 48 b8 00 
RIP  [<ffffffff836c39cc>] l2tp_session_free+0x11c/0x200 net/l2tp/l2tp_core.c:1765
 RSP <ffff8801d940fb00>
CR2: 0000000000000080
---[ end trace 6cc0923433164fc6 ]---