[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.463071] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.
[   20.844326] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)
[   21.217362] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.992695] random: sshd: uninitialized urandom read (32 bytes read, 72 bits of entropy available)
[   35.111150] random: sshd: uninitialized urandom read (32 bytes read, 81 bits of entropy available)
Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts.
[   40.787255] random: sshd: uninitialized urandom read (32 bytes read, 85 bits of entropy available)
2018/08/26 17:51:22 parsed 1 programs
[   42.273187] random: cc1: uninitialized urandom read (8 bytes read, 87 bits of entropy available)
2018/08/26 17:51:24 executed programs: 0
[   43.309308] IPVS: Creating netns size=2552 id=1
[   43.550473] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   43.565859] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   43.644596] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   43.659421] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   43.739014] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   43.753811] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   43.771503] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   43.789206] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   44.515718] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   44.553901] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
2018/08/26 17:51:29 executed programs: 234
2018/08/26 17:51:34 executed programs: 562
2018/08/26 17:51:39 executed programs: 890
2018/08/26 17:51:44 executed programs: 1206
2018/08/26 17:51:49 executed programs: 1537
[   71.247800] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   71.256037] IP: [<ffffffff835aa888>] l2tp_session_create+0x948/0x1030
[   71.262731] PGD bad83067 PUD aeb68067 PMD 0 
[   71.267477] Oops: 0002 [#1] PREEMPT SMP KASAN
[   71.272428] Dumping ftrace buffer:
[   71.275944]    (ftrace buffer empty)
[   71.279626] Modules linked in:
[   71.282916] CPU: 0 PID: 10704 Comm: syz-executor0 Not tainted 4.4.152-ge5c5f1f #25
[   71.290600] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   71.299939] task: ffff8801d85b8000 task.stack: ffff8800bab00000
[   71.305970] RIP: 0010:[<ffffffff835aa888>]  [<ffffffff835aa888>] l2tp_session_create+0x948/0x1030
[   71.315080] RSP: 0018:ffff8800bab07ad0  EFLAGS: 00010246
[   71.320500] RAX: 0000000000000000 RBX: ffff8800b2e76c80 RCX: 0000000000000006
[   71.327745] RDX: 1ffff100165cedc0 RSI: ffffffff835a4993 RDI: ffff8800b2e76e00
[   71.334990] RBP: ffff8800bab07b40 R08: 000000000000000a R09: 000000000000ffff
[   71.342236] R10: ffffed00165cec18 R11: ffffffff8463a140 R12: ffff8800b2e760a8
[   71.349479] R13: ffff8800bab07c58 R14: ffff8800b2e76000 R15: ffffffff835a35c0
[   71.356724] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77beb40
[   71.364922] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   71.370777] CR2: 0000000000000080 CR3: 00000000b2fd9000 CR4: 00000000001606f0
[   71.378025] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   71.385277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   71.392525] Stack:
[   71.394648]  ffffffff81140a6a ffff8800b2e76ca0 ffff8800b2e76158 ffff8800b2e76010
[   71.402645]  ffffffff838cbee0 ffff8800b2e760b0 ffff8800b2e76150 ffff8800b2e76d60
[   71.410648]  ffffffff00000000 ffff8801c9778000 0000000000000000 ffff8801c9778030
[   71.418655] Call Trace:
[   71.421221]  [<ffffffff81140a6a>] ? __local_bh_enable_ip+0x6a/0xd0
[   71.427750]  [<ffffffff838cbee0>] ? _raw_read_unlock_bh+0x30/0x40
[   71.433964]  [<ffffffff835aec80>] pppol2tp_connect+0x10f0/0x1910
[   71.440084]  [<ffffffff835adb90>] ? pppol2tp_recv+0x320/0x320
[   71.445948]  [<ffffffff81c5710f>] ? security_socket_connect+0x8f/0xc0
[   71.452938]  [<ffffffff82f27bf8>] SYSC_connect+0x1b8/0x300
[   71.458543]  [<ffffffff82f27a40>] ? SYSC_bind+0x280/0x280
[   71.464120]  [<ffffffff8157fed0>] ? get_unused_fd_flags+0xd0/0xd0
[   71.470330]  [<ffffffff812d58f0>] ? compat_SyS_get_robust_list+0x310/0x310
[   71.477320]  [<ffffffff82f29c61>] ? SyS_socket+0x121/0x1b0
[   71.482916]  [<ffffffff82f29b40>] ? move_addr_to_kernel+0x50/0x50
[   71.489131]  [<ffffffff82f2a544>] SyS_connect+0x24/0x30
[   71.494475]  [<ffffffff82f2a520>] ? SyS_accept+0x30/0x30
[   71.499912]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   71.506035]  [<ffffffff838cdec3>] sysenter_flags_fixed+0xd/0x1a
[   71.512063] 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 
[   71.538957] RIP  [<ffffffff835aa888>] l2tp_session_create+0x948/0x1030
[   71.545722]  RSP <ffff8800bab07ad0>
[   71.549318] CR2: 0000000000000080
[   71.553429] ---[ end trace 0801487c21a74233 ]---
[   71.559157] Kernel panic - not syncing: Fatal exception
[   71.564561] Dumping ftrace buffer:
[   71.568079]    (ftrace buffer empty)
[   71.571764] Kernel Offset: disabled
[   71.575360] Rebooting in 86400 seconds..