[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   21.169654] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   25.512521] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   25.902529] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   26.633966] random: sshd: uninitialized urandom read (32 bytes read, 70 bits of entropy available)
[   43.407496] random: sshd: uninitialized urandom read (32 bytes read, 80 bits of entropy available)
Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts.
[   49.036360] random: sshd: uninitialized urandom read (32 bytes read, 85 bits of entropy available)
2018/08/22 19:38:30 parsed 1 programs
[   50.605381] random: cc1: uninitialized urandom read (8 bytes read, 87 bits of entropy available)
2018/08/22 19:38:32 executed programs: 0
[   51.798642] IPVS: Creating netns size=2552 id=1
[   52.047698] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   52.062874] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   52.147047] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   52.161942] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   52.244879] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   52.260371] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   52.276894] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   52.294617] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   53.027432] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   53.068367] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   54.272196] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   54.280433] IP: [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   54.287128] PGD 1d6a1c067 PUD 1d6a18067 PMD 0 
[   54.292070] Oops: 0002 [#1] PREEMPT SMP KASAN
[   54.297037] Dumping ftrace buffer:
[   54.300548]    (ftrace buffer empty)
[   54.304357] Modules linked in:
[   54.307652] CPU: 1 PID: 4348 Comm: syz-executor0 Not tainted 4.4.151-ge917467 #20
[   54.315246] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   54.324574] task: ffff8801d6dc9800 task.stack: ffff8801d65c8000
[   54.330625] RIP: 0010:[<ffffffff835aa438>]  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   54.339741] RSP: 0018:ffff8801d65cfad0  EFLAGS: 00010246
[   54.345163] RAX: 0000000000000000 RBX: ffff8801d6898000 RCX: 0000000000000006
[   54.352410] RDX: 1ffff1003ad13030 RSI: ffffffff835a4543 RDI: ffff8801d6898180
[   54.359662] RBP: ffff8801d65cfb40 R08: ffff8801d6dca100 R09: 0000000000000000
[   54.366915] R10: 0000000000000000 R11: ffffffff8463a140 R12: ffff8801d6898328
[   54.374160] R13: ffff8801d65cfc58 R14: ffff8801d6898280 R15: ffffffff835a3170
[   54.381408] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77f9b40
[   54.389607] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   54.395463] CR2: 0000000000000080 CR3: 00000001d69b0000 CR4: 00000000001606f0
[   54.402710] Stack:
[   54.404834]  ffffffff81140a6a ffff8801d6898020 ffff8801d68983d8 ffff8801d6898290
[   54.412919]  ffffffff838cba90 ffff8801d6898330 ffff8801d68983d0 ffff8801d68980e0
[   54.420986]  ffffffff00000000 ffff8801d6ff9100 0000000000000000 ffff8801d6ff9130
[   54.429038] Call Trace:
[   54.431613]  [<ffffffff81140a6a>] ? __local_bh_enable_ip+0x6a/0xd0
[   54.437922]  [<ffffffff838cba90>] ? _raw_read_unlock_bh+0x30/0x40
[   54.444134]  [<ffffffff835ae830>] pppol2tp_connect+0x10f0/0x1910
[   54.450253]  [<ffffffff835ad740>] ? pppol2tp_recv+0x320/0x320
[   54.456124]  [<ffffffff81c5700f>] ? security_socket_connect+0x8f/0xc0
[   54.462683]  [<ffffffff82f27758>] SYSC_connect+0x1b8/0x300
[   54.468281]  [<ffffffff82f275a0>] ? SYSC_bind+0x280/0x280
[   54.473795]  [<ffffffff8157fdd0>] ? get_unused_fd_flags+0xd0/0xd0
[   54.480003]  [<ffffffff812d59b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   54.486992]  [<ffffffff8157e48f>] ? __fget+0x16f/0x3b0
[   54.492245]  [<ffffffff8157e367>] ? __fget+0x47/0x3b0
[   54.497417]  [<ffffffff82f2a094>] SyS_connect+0x24/0x30
[   54.502758]  [<ffffffff82f2a070>] ? SyS_accept+0x30/0x30
[   54.508184]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   54.514305]  [<ffffffff838cda83>] sysenter_flags_fixed+0xd/0x1a
[   54.520334] Code: 00 00 48 8d bb 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 36 06 00 00 48 8b 83 80 01 00 00 <f0> ff 80 80 00 00 00 48 8d 43 20 48 89 c7 48 89 45 b0 e8 f1 13 
[   54.547353] RIP  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   54.554122]  RSP <ffff8801d65cfad0>
[   54.557722] CR2: 0000000000000080
[   54.561785] ---[ end trace cc4dd694f87e8e85 ]---
[   54.567127] Kernel panic - not syncing: Fatal exception
[   54.572832] Dumping ftrace buffer:
[   54.576354]    (ftrace buffer empty)
[   54.580041] Kernel Offset: disabled
[   54.583666] Rebooting in 86400 seconds..