[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.226669] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   13.461764] random: sshd: uninitialized urandom read (32 bytes read)
[   13.691160] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   14.499916] random: sshd: uninitialized urandom read (32 bytes read)
[   37.813761] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts.
[   43.409683] random: sshd: uninitialized urandom read (32 bytes read)
2018/08/20 10:51:55 parsed 1 programs
[   44.655966] random: cc1: uninitialized urandom read (8 bytes read)
2018/08/20 10:51:57 executed programs: 0
[   45.766434] IPVS: Creating netns size=2536 id=1
[   45.898350] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   45.910702] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   45.957792] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   45.969384] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   46.014093] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   46.026539] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   46.038801] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   46.059700] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   46.595020] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   46.621149] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
[   46.627513] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[   46.634402] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   47.736374] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   47.744949] IP: [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   47.751661] PGD 1d868f067 [   47.754345] PUD 1d46dc067 
PMD 0 [   47.757852] 
[   47.759489] Oops: 0002 [#1] PREEMPT SMP KASAN
[   47.764065] Dumping ftrace buffer:
[   47.767597]    (ftrace buffer empty)
[   47.771295] Modules linked in:
[   47.774660] CPU: 0 PID: 4282 Comm: syz-executor0 Not tainted 4.9.122-g54068d6 #78
[   47.782536] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.792052] task: ffff8801d45e9800 task.stack: ffff8801d4bc0000
[   47.798103] RIP: 0010:[<ffffffff836c7e40>]  [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   47.807493] RSP: 0018:ffff8801d4bc7ac0  EFLAGS: 00010246
[   47.812932] RAX: 0000000000000000 RBX: ffff8801d6dfec80 RCX: 1ffff1003a8bd41d
[   47.820350] RDX: 1ffff1003adbfcd0 RSI: ffff8801d45ea0c8 RDI: ffff8801d6dfe680
[   47.827712] RBP: ffff8801d4bc7b60 R08: ffff8801d45ea0e8 R09: 0000000000000000
[   47.835195] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d6dfe558
[   47.843799] R13: 0000000000000000 R14: ffff8801d6dfe500 R15: 0000000000000000
[   47.851241] FS:  00007f887f681700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   47.859458] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.865355] CR2: 0000000000000080 CR3: 00000001d4907000 CR4: 00000000001606f0
[   47.872731] Stack:
[   47.874955]  ffffffff836c80b7 ffffffff836c9151 ffff8801d3b54c48 0000000000000000
[   47.883073]  ffff8801d6dfe500 ffff8801d6dfedd8 ffff8801d6dfe558 ffff8801d6dfedd0
[   47.891285]  ffff8801d6dfed30 ffff8801d6dfe520 ffff8801d3b54400 0000000000000000
[   47.899352] Call Trace:
[   47.901932]  [<ffffffff836c80b7>] ? l2tp_session_create+0xed7/0x16f0
[   47.908417]  [<ffffffff836c9151>] ? l2tp_session_get+0x1d1/0x790
[   47.914551]  [<ffffffff836ccff7>] pppol2tp_connect+0x10d7/0x18f0
[   47.920856]  [<ffffffff836cbf20>] ? pppol2tp_seq_show+0xc30/0xc30
[   47.927082]  [<ffffffff81cf826f>] ? security_socket_connect+0x8f/0xc0
[   47.933652]  [<ffffffff8301d958>] SYSC_connect+0x1b8/0x300
[   47.939267]  [<ffffffff8301d7a0>] ? SYSC_bind+0x280/0x280
[   47.945000]  [<ffffffff815daf70>] ? get_unused_fd_flags+0xd0/0xd0
[   47.951229]  [<ffffffff812db6d0>] ? do_futex+0x17c0/0x17c0
[   47.956939]  [<ffffffff8301f951>] ? SyS_socket+0x121/0x1b0
[   47.962741]  [<ffffffff8301f830>] ? move_addr_to_kernel+0x50/0x50
[   47.969062]  [<ffffffff815b77d0>] ? do_vfs_ioctl+0x11a0/0x11a0
[   47.975039]  [<ffffffff83020224>] SyS_connect+0x24/0x30
[   47.980509]  [<ffffffff83020200>] ? SyS_accept+0x30/0x30
[   47.987027]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   47.992741]  [<ffffffff83a00cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   47.999651] Code: 00 00 49 8d be 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 7b 09 00 00 49 8b 86 80 01 00 00 <f0> ff 80 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 55 d0 
[   48.027763] RIP  [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   48.034556]  RSP <ffff8801d4bc7ac0>
[   48.038170] CR2: 0000000000000080
[   48.042045] ---[ end trace 49befb2320891f12 ]---
[   48.046948] Kernel panic - not syncing: Fatal exception
[   48.052860] Dumping ftrace buffer:
[   48.056479]    (ftrace buffer empty)
[   48.061247] Kernel Offset: disabled
[   48.064959] Rebooting in 86400 seconds..