[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   19.652875] 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: [   24.306099] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available)
[   24.707126] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   25.297053] random: sshd: uninitialized urandom read (32 bytes read, 50 bits of entropy available)
[   25.463770] random: sshd: uninitialized urandom read (32 bytes read, 53 bits of entropy available)
Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts.
[   30.937729] random: sshd: uninitialized urandom read (32 bytes read, 57 bits of entropy available)
2018/08/22 12:15:24 parsed 1 programs
[   32.631623] random: cc1: uninitialized urandom read (8 bytes read, 59 bits of entropy available)
2018/08/22 12:15:27 executed programs: 0
[   34.200312] IPVS: Creating netns size=2552 id=1
[   34.448789] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   34.464895] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   34.548245] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   34.564070] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   34.650040] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   34.665624] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   34.681901] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   34.701816] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   35.466825] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   35.506177] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   35.808022] hrtimer: interrupt took 26575 ns
[   36.848279] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   36.856586] IP: [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   36.863394] PGD b9ae7067 PUD b9afb067 PMD 0 
[   36.868272] Oops: 0002 [#1] PREEMPT SMP KASAN
[   36.873366] Dumping ftrace buffer:
[   36.876892]    (ftrace buffer empty)
[   36.880596] Modules linked in:
[   36.883930] CPU: 0 PID: 4279 Comm: syz-executor0 Not tainted 4.4.151-ge917467 #20
[   36.891541] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.900936] task: ffff8801d7988000 task.stack: ffff8800b98e0000
[   36.906978] RIP: 0010:[<ffffffff835aa438>]  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   36.916112] RSP: 0018:ffff8800b98e7ad0  EFLAGS: 00010246
[   36.921545] RAX: 0000000000000000 RBX: ffff8800b9a51b80 RCX: 0000000000000006
[   36.928950] RDX: 1ffff1001734a3a0 RSI: ffffffff835a4543 RDI: ffff8800b9a51d00
[   36.936208] RBP: ffff8800b98e7b40 R08: ffff8801d7988900 R09: 0000000000000000
[   36.943515] R10: 0000000000000000 R11: ffffffff8463a140 R12: ffff8800ba9905a8
[   36.950881] R13: ffff8800b98e7c58 R14: ffff8800ba990500 R15: ffffffff835a3170
[   36.958145] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7737b40
[   36.966423] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   36.972299] CR2: 0000000000000080 CR3: 00000000bad8b000 CR4: 00000000001606f0
[   36.979560] Stack:
[   36.981696]  ffffffff81140a6a ffff8800b9a51ba0 ffff8800ba990658 ffff8800ba990510
[   36.989830]  ffffffff838cba90 ffff8800ba9905b0 ffff8800ba990650 ffff8800b9a51c60
[   36.997881]  ffffffff00000000 ffff8801d794b300 0000000000000000 ffff8801d794b330
[   37.005946] Call Trace:
[   37.008520]  [<ffffffff81140a6a>] ? __local_bh_enable_ip+0x6a/0xd0
[   37.014849]  [<ffffffff838cba90>] ? _raw_read_unlock_bh+0x30/0x40
[   37.021183]  [<ffffffff835ae830>] pppol2tp_connect+0x10f0/0x1910
[   37.027315]  [<ffffffff835ad740>] ? pppol2tp_recv+0x320/0x320
[   37.033188]  [<ffffffff81c5700f>] ? security_socket_connect+0x8f/0xc0
[   37.039760]  [<ffffffff82f27758>] SYSC_connect+0x1b8/0x300
[   37.045370]  [<ffffffff813fcff1>] ? SYSC_perf_event_open+0x211/0x2470
[   37.052223]  [<ffffffff82f275a0>] ? SYSC_bind+0x280/0x280
[   37.057749]  [<ffffffff8157fdd0>] ? get_unused_fd_flags+0xd0/0xd0
[   37.063967]  [<ffffffff812d59b0>] ? compat_SyS_get_robust_list+0x310/0x310
[   37.070966]  [<ffffffff82f296a0>] ? move_addr_to_kernel+0x50/0x50
[   37.077184]  [<ffffffff82f2a094>] SyS_connect+0x24/0x30
[   37.082535]  [<ffffffff82f2a070>] ? SyS_accept+0x30/0x30
[   37.088015]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   37.094299]  [<ffffffff838cda83>] sysenter_flags_fixed+0xd/0x1a
[   37.100340] 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 
[   37.128530] RIP  [<ffffffff835aa438>] l2tp_session_create+0x948/0x1030
[   37.135319]  RSP <ffff8800b98e7ad0>
[   37.138925] CR2: 0000000000000080
[   37.143964] ---[ end trace ed2aef5ee3677cbb ]---
[   37.148730] Kernel panic - not syncing: Fatal exception
[   37.154621] Dumping ftrace buffer:
[   37.158159]    (ftrace buffer empty)
[   37.161855] Kernel Offset: disabled
[   37.165467] Rebooting in 86400 seconds..