[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.722478] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   25.470369] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   26.016023] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   27.332073] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available)
[   83.894389] random: nonblocking pool is initialized
Warning: Permanently added '10.128.0.61' (ECDSA) to the list of known hosts.
2018/07/13 12:19:22 parsed 1 programs
2018/07/13 12:19:24 executed programs: 0
[   92.293725] IPVS: Creating netns size=2552 id=1
[   92.342192] IPVS: Creating netns size=2552 id=2
[   92.386788] IPVS: Creating netns size=2552 id=3
[   92.432000] IPVS: Creating netns size=2552 id=4
[   92.504432] IPVS: Creating netns size=2552 id=5
[   92.581793] IPVS: Creating netns size=2552 id=6
[   92.695072] IPVS: Creating netns size=2552 id=7
[   92.795726] IPVS: Creating netns size=2552 id=8
2018/07/13 12:19:29 executed programs: 343
2018/07/13 12:19:34 executed programs: 669
2018/07/13 12:19:39 executed programs: 989
2018/07/13 12:19:44 executed programs: 1323
[  112.845136] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[  112.853477] IP: [<ffffffff835a0b08>] l2tp_session_create+0x948/0x1030
[  112.860211] PGD 1ca92e067 PUD 1d175b067 PMD 0 
[  112.865174] Oops: 0002 [#1] PREEMPT SMP KASAN
[  112.870235] Dumping ftrace buffer:
[  112.873770]    (ftrace buffer empty)
[  112.877471] Modules linked in:
[  112.880783] CPU: 0 PID: 9289 Comm: syz-executor4 Not tainted 4.4.140-g789274d #3
[  112.888302] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  112.897654] task: ffff8800ae64b000 task.stack: ffff8801d2900000
[  112.903730] RIP: 0010:[<ffffffff835a0b08>]  [<ffffffff835a0b08>] l2tp_session_create+0x948/0x1030
[  112.912881] RSP: 0018:ffff8801d2907ad0  EFLAGS: 00010246
[  112.918322] RAX: 0000000000000000 RBX: ffff8801d9252500 RCX: 0000000000000006
[  112.925586] RDX: 1ffff1003b24a4d0 RSI: ffffffff8359abe3 RDI: ffff8801d9252680
[  112.932851] RBP: ffff8801d2907b40 R08: ffff8800ae64b900 R09: 0000000000000000
[  112.940117] R10: 0000000000000000 R11: ffffffff84638de0 R12: ffff8800b5ccd728
[  112.947543] R13: ffff8801d2907c58 R14: ffff8800b5ccd680 R15: ffffffff83599810
[  112.954814] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7741b40
[  112.963068] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[  112.968964] CR2: 0000000000000080 CR3: 00000001da266000 CR4: 00000000001606f0
[  112.976234] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  112.983501] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  112.990766] Stack:
[  112.992913]  ffffffff8113da8a ffff8801d9252520 ffff8800b5ccd7d8 ffff8800b5ccd690
[  113.000957]  ffffffff838c2100 ffff8800b5ccd730 ffff8800b5ccd7d0 ffff8801d92525e0
[  113.009530]  ffffffff00000000 ffff8800b92fdd80 0000000000000000 ffff8800b92fddb0
[  113.017565] Call Trace:
[  113.020148]  [<ffffffff8113da8a>] ? __local_bh_enable_ip+0x6a/0xd0
[  113.026485]  [<ffffffff838c2100>] ? _raw_read_unlock_bh+0x30/0x40
[  113.032719]  [<ffffffff835a4f00>] pppol2tp_connect+0x10f0/0x1910
[  113.038864]  [<ffffffff835a3e10>] ? pppol2tp_recv+0x320/0x320
[  113.044746]  [<ffffffff81c4fbaf>] ? security_socket_connect+0x8f/0xc0
[  113.051325]  [<ffffffff82f1e828>] SYSC_connect+0x1b8/0x300
[  113.056956]  [<ffffffff82f1e670>] ? SYSC_bind+0x280/0x280
[  113.062491]  [<ffffffff8157a410>] ? get_unused_fd_flags+0xd0/0xd0
[  113.068733]  [<ffffffff812d28e0>] ? compat_SyS_get_robust_list+0x310/0x310
[  113.075742]  [<ffffffff82f20891>] ? SyS_socket+0x121/0x1b0
[  113.081343]  [<ffffffff82f20770>] ? move_addr_to_kernel+0x50/0x50
[  113.087553]  [<ffffffff82f21164>] SyS_connect+0x24/0x30
[  113.092907]  [<ffffffff82f21140>] ? SyS_accept+0x30/0x30
[  113.098412]  [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0
[  113.104552]  [<ffffffff838c40ea>] sysenter_flags_fixed+0xd/0x17
[  113.110582] 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 91 13 
[  113.137551] RIP  [<ffffffff835a0b08>] l2tp_session_create+0x948/0x1030
[  113.144316]  RSP <ffff8801d2907ad0>
[  113.147914] CR2: 0000000000000080
[  113.159540] ---[ end trace c557b2214faf800b ]---
[  113.164834] Kernel panic - not syncing: Fatal exception
[  113.170703] Dumping ftrace buffer:
[  113.174234]    (ftrace buffer empty)
[  113.177919] Kernel Offset: disabled
[  113.181519] Rebooting in 86400 seconds..