[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.850534] 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: [   25.557985] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   25.982442] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   26.666896] random: sshd: uninitialized urandom read (32 bytes read, 68 bits of entropy available)
[   53.890781] random: sshd: uninitialized urandom read (32 bytes read, 78 bits of entropy available)
Warning: Permanently added '10.128.10.1' (ECDSA) to the list of known hosts.
[   59.390650] random: sshd: uninitialized urandom read (32 bytes read, 82 bits of entropy available)
2018/08/22 08:26:27 parsed 1 programs
[   61.094469] random: cc1: uninitialized urandom read (8 bytes read, 84 bits of entropy available)
2018/08/22 08:26:30 executed programs: 0
[   62.810219] IPVS: Creating netns size=2552 id=1
[   63.063228] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   63.078869] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   63.166038] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   63.180755] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   63.263550] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   63.279804] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   63.296984] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   63.312673] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   64.071734] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   64.110117] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   65.916343] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   65.924571] IP: [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   65.931257] PGD 1d7ece067 PUD 1d671b067 PMD 0 
[   65.936171] Oops: 0002 [#1] PREEMPT SMP KASAN
[   65.941136] Dumping ftrace buffer:
[   65.944649]    (ftrace buffer empty)
[   65.948348] Modules linked in:
[   65.951648] CPU: 1 PID: 4459 Comm: syz-executor0 Not tainted 4.4.151-ge917467 #20
[   65.959243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   65.968797] task: ffff8801d6b48000 task.stack: ffff8801d48e8000
[   65.974828] RIP: 0010:[<ffffffff835aa438>]  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   65.983954] RSP: 0018:ffff8801d48efad0  EFLAGS: 00010246
[   65.989374] RAX: 0000000000000000 RBX: ffff8801d4916000 RCX: 0000000000000006
[   65.996617] RDX: 1ffff1003a922c30 RSI: ffffffff835a4543 RDI: ffff8801d4916180
[   66.003861] RBP: ffff8801d48efb40 R08: ffff8801d6b48900 R09: 0000000000000000
[   66.011108] R10: 0000000000000000 R11: ffffffff8463a140 R12: ffff8800b76120a8
[   66.018352] R13: ffff8801d48efc58 R14: ffff8800b7612000 R15: ffffffff835a3170
[   66.025607] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f772eb40
[   66.033808] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   66.039665] CR2: 0000000000000080 CR3: 00000001d6db2000 CR4: 00000000001606f0
[   66.046908] Stack:
[   66.049043]  ffffffff81140a6a ffff8801d4916020 ffff8800b7612158 ffff8800b7612010
[   66.057083]  ffffffff838cba90 ffff8800b76120b0 ffff8800b7612150 ffff8801d49160e0
[   66.065103]  ffffffff00000000 ffff8801cef03300 0000000000000000 ffff8801cef03330
[   66.073113] Call Trace:
[   66.075687]  [<ffffffff81140a6a>] ? __local_bh_enable_ip+0x6a/0xd0
[   66.081986]  [<ffffffff838cba90>] ? _raw_read_unlock_bh+0x30/0x40
[   66.088195]  [<ffffffff835ae830>] pppol2tp_connect+0x10f0/0x1910
[   66.094322]  [<ffffffff835ad740>] ? pppol2tp_recv+0x320/0x320
[   66.100199]  [<ffffffff81c5700f>] ? security_socket_connect+0x8f/0xc0
[   66.106755]  [<ffffffff82f27758>] SYSC_connect+0x1b8/0x300
[   66.112378]  [<ffffffff82f275a0>] ? SYSC_bind+0x280/0x280
[   66.117892]  [<ffffffff8157fdd0>] ? get_unused_fd_flags+0xd0/0xd0
[   66.124103]  [<ffffffff812d59b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   66.131099]  [<ffffffff82f297c1>] ? SyS_socket+0x121/0x1b0
[   66.136734]  [<ffffffff82f296a0>] ? move_addr_to_kernel+0x50/0x50
[   66.142941]  [<ffffffff82f2a094>] SyS_connect+0x24/0x30
[   66.148280]  [<ffffffff82f2a070>] ? SyS_accept+0x30/0x30
[   66.153705]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   66.159827]  [<ffffffff838cda83>] sysenter_flags_fixed+0xd/0x1a
[   66.165881] 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 
[   66.193000] RIP  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   66.199765]  RSP <ffff8801d48efad0>
[   66.203361] CR2: 0000000000000080
[   66.208337] ---[ end trace a89426816626d703 ]---
[   66.213096] Kernel panic - not syncing: Fatal exception
[   66.218735] Dumping ftrace buffer:
[   66.222274]    (ftrace buffer empty)
[   66.225958] Kernel Offset: disabled
[   66.229559] Rebooting in 86400 seconds..