[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   15.689412] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   16.161323] random: sshd: uninitialized urandom read (32 bytes read)
[   16.352930] random: sshd: uninitialized urandom read (32 bytes read)

[   16.856970] random: sshd: uninitialized urandom read (32 bytes read)
Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   16.997841] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts.
[   22.646882] random: sshd: uninitialized urandom read (32 bytes read)
2018/08/22 05:01:22 parsed 1 programs
[   23.930093] random: cc1: uninitialized urandom read (8 bytes read)
2018/08/22 05:01:24 executed programs: 0
[   25.258466] IPVS: Creating netns size=2536 id=1
[   25.377103] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   25.388122] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   25.430162] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   25.441395] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   25.483235] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   25.494059] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   25.506215] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   25.527199] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   26.034666] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   26.058445] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
[   26.065086] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[   26.072557] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   26.251399] hrtimer: interrupt took 23197 ns
[   27.215352] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   27.223585] IP: [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   27.230266] PGD 1cdf89067 [   27.232917] PUD 1cfd25067 
PMD 0 [   27.236399] 
[   27.238020] Oops: 0002 [#1] PREEMPT SMP KASAN
[   27.242495] Dumping ftrace buffer:
[   27.246019]    (ftrace buffer empty)
[   27.249703] Modules linked in:
[   27.252989] CPU: 0 PID: 4678 Comm: syz-executor0 Not tainted 4.9.122-g54068d6 #26
[   27.260583] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.269911] task: ffff8801cef9b000 task.stack: ffff8801cdf50000
[   27.275939] RIP: 0010:[<ffffffff836c7e40>]  [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   27.285046] RSP: 0018:ffff8801cdf57ac0  EFLAGS: 00010246
[   27.290466] RAX: 0000000000000000 RBX: ffff8801ce8a6f00 RCX: 1ffff10039df371d
[   27.297736] RDX: 1ffff10039d14cd0 RSI: ffff8801cef9b8c8 RDI: ffff8801ce8a6680
[   27.304981] RBP: ffff8801cdf57b60 R08: ffff8801cef9b8e8 R09: 0000000000000000
[   27.312226] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ce8a6558
[   27.319471] R13: 0000000000000000 R14: ffff8801ce8a6500 R15: ffff8801cdf57c78
[   27.326727] FS:  00007fc5c2aed700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   27.334929] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.340785] CR2: 0000000000000080 CR3: 00000001cde83000 CR4: 00000000001606f0
[   27.348033] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.355293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.362550] Stack:
[   27.364690]  0000000000000201 ffffffff836c9151 ffff8801cdf57ae0 ffffffff81237ecd
[   27.372681]  ffff8801ce8a6500 ffff8801ce8a7058 ffff8801ce8a6558 ffff8801ce8a7050
[   27.380683]  ffff8801ce8a6fb0 ffff8801ce8a6520 0000000000000000 0000000000000000
[   27.388671] Call Trace:
[   27.391236]  [<ffffffff836c9151>] ? l2tp_session_get+0x1d1/0x790
[   27.397358]  [<ffffffff81237ecd>] ? trace_hardirqs_on+0xd/0x10
[   27.403304]  [<ffffffff836ccff7>] pppol2tp_connect+0x10d7/0x18f0
[   27.409422]  [<ffffffff836cbf20>] ? pppol2tp_seq_show+0xc30/0xc30
[   27.415630]  [<ffffffff81cf826f>] ? security_socket_connect+0x8f/0xc0
[   27.422185]  [<ffffffff8301d958>] SYSC_connect+0x1b8/0x300
[   27.427785]  [<ffffffff8301d7a0>] ? SYSC_bind+0x280/0x280
[   27.433322]  [<ffffffff812db6d0>] ? do_futex+0x17c0/0x17c0
[   27.438922]  [<ffffffff8301f830>] ? move_addr_to_kernel+0x50/0x50
[   27.445127]  [<ffffffff83020224>] SyS_connect+0x24/0x30
[   27.450467]  [<ffffffff83020200>] ? SyS_accept+0x30/0x30
[   27.455901]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   27.461587]  [<ffffffff83a00cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   27.468490] 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 
[   27.495467] RIP  [<ffffffff836c7e40>] l2tp_session_create+0xc60/0x16f0
[   27.502233]  RSP <ffff8801cdf57ac0>
[   27.505828] CR2: 0000000000000080
[   27.510609] ---[ end trace 3cdc5b19ff4bf685 ]---
[   27.515378] Kernel panic - not syncing: Fatal exception
[   27.521056] Dumping ftrace buffer:
[   27.524573]    (ftrace buffer empty)
[   27.528273] Kernel Offset: disabled
[   27.531873] Rebooting in 86400 seconds..