[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.683178] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.
[   20.237788] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)
[   20.551168] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.127351] random: sshd: uninitialized urandom read (32 bytes read, 49 bits of entropy available)
[   25.023590] random: sshd: uninitialized urandom read (32 bytes read, 56 bits of entropy available)
Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts.
[   30.639641] random: sshd: uninitialized urandom read (32 bytes read, 58 bits of entropy available)
2018/08/22 22:42:51 parsed 1 programs
[   32.153530] random: cc1: uninitialized urandom read (8 bytes read, 60 bits of entropy available)
2018/08/22 22:42:53 executed programs: 0
[   33.495498] IPVS: Creating netns size=2552 id=1
[   33.740077] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   33.756371] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   33.839273] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   33.854532] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   33.940039] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   33.954366] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   33.970841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   33.988055] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   34.032348] ip (3764) used greatest stack depth: 23584 bytes left
[   34.733335] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   34.773228] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
2018/08/22 22:42:58 executed programs: 214
2018/08/22 22:43:03 executed programs: 537
2018/08/22 22:43:08 executed programs: 861
[   51.681344] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   51.689580] IP: [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   51.696265] PGD b3d1c067 PUD b2b97067 PMD 0 
[   51.701007] Oops: 0002 [#1] PREEMPT SMP KASAN
[   51.705989] Dumping ftrace buffer:
[   51.709500]    (ftrace buffer empty)
[   51.713194] Modules linked in:
[   51.716481] CPU: 1 PID: 8069 Comm: syz-executor0 Not tainted 4.4.151-ge917467 #20
[   51.724071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.733400] task: ffff8801d3bc8000 task.stack: ffff8800b61e0000
[   51.739435] RIP: 0010:[<ffffffff835aa438>]  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   51.748562] RSP: 0018:ffff8800b61e7ad0  EFLAGS: 00010246
[   51.753983] RAX: 0000000000000000 RBX: ffff8801d294f180 RCX: 0000000000000006
[   51.761228] RDX: 1ffff1003a529e60 RSI: ffffffff835a4543 RDI: ffff8801d294f300
[   51.768473] RBP: ffff8800b61e7b40 R08: ffff8801d3bc8900 R09: 0000000000000000
[   51.775721] R10: 0000000000000000 R11: ffffffff8463a140 R12: ffff8801da146aa8
[   51.782968] R13: ffff8800b61e7c58 R14: ffff8801da146a00 R15: ffffffff835a3170
[   51.790221] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77afb40
[   51.798420] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   51.804274] CR2: 0000000000000080 CR3: 00000000b927f000 CR4: 00000000001606f0
[   51.811530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.818772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.826016] Stack:
[   51.828139]  ffffffff81140a6a ffff8801d294f1a0 ffff8801da146b58 ffff8801da146a10
[   51.836126]  ffffffff838cba90 ffff8801da146ab0 ffff8801da146b50 ffff8801d294f260
[   51.844119]  ffffffff00000000 ffff8801cc192200 0000000000000000 ffff8801cc192230
[   51.852106] Call Trace:
[   51.854676]  [<ffffffff81140a6a>] ? __local_bh_enable_ip+0x6a/0xd0
[   51.860974]  [<ffffffff838cba90>] ? _raw_read_unlock_bh+0x30/0x40
[   51.867187]  [<ffffffff835ae830>] pppol2tp_connect+0x10f0/0x1910
[   51.873311]  [<ffffffff835ad740>] ? pppol2tp_recv+0x320/0x320
[   51.879186]  [<ffffffff81c5700f>] ? security_socket_connect+0x8f/0xc0
[   51.885742]  [<ffffffff82f27758>] SYSC_connect+0x1b8/0x300
[   51.891339]  [<ffffffff82f275a0>] ? SYSC_bind+0x280/0x280
[   51.896853]  [<ffffffff8157fdd0>] ? get_unused_fd_flags+0xd0/0xd0
[   51.903063]  [<ffffffff812d59b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   51.910054]  [<ffffffff815816f5>] ? SyS_dup2+0x3c5/0x5e0
[   51.915489]  [<ffffffff82f2a094>] SyS_connect+0x24/0x30
[   51.920870]  [<ffffffff82f2a070>] ? SyS_accept+0x30/0x30
[   51.926300]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   51.932423]  [<ffffffff838cda83>] sysenter_flags_fixed+0xd/0x1a
[   51.938450] 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 
[   51.965317] RIP  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   51.972084]  RSP <ffff8800b61e7ad0>
[   51.975683] CR2: 0000000000000080
[   51.980021] ---[ end trace 45eb8e43bbeca002 ]---
[   51.984802] Kernel panic - not syncing: Fatal exception
[   51.990204] Dumping ftrace buffer:
[   51.993719]    (ftrace buffer empty)
[   51.997401] Kernel Offset: disabled
[   52.001001] Rebooting in 86400 seconds..