[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   13.163290] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   22.227921] random: sshd: uninitialized urandom read (32 bytes read)
[   22.454018] random: sshd: uninitialized urandom read (32 bytes read)
[   22.838276] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts.
[   28.460981] urandom_read: 1 callbacks suppressed
[   28.460984] random: sshd: uninitialized urandom read (32 bytes read)
2018/08/22 22:34:44 parsed 1 programs
[   29.507798] random: cc1: uninitialized urandom read (8 bytes read)
2018/08/22 22:34:45 executed programs: 0
[   30.523561] IPVS: Creating netns size=2536 id=1
[   30.644168] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   30.656592] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   30.700363] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   30.711520] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   30.755721] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   30.767173] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   30.779199] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   30.793360] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   31.286134] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   31.310676] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
[   31.316778] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[   31.323987] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   31.509659] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
[   31.517886] IP: [<ffffffff836c8e30>] l2tp_session_create+0xc60/0x16f0
[   31.524576] PGD 1bb6cb067 [   31.527217] PUD 1d738b067 
PMD 0 [   31.530713] 
[   31.532438] Oops: 0002 [#1] PREEMPT SMP KASAN
[   31.537069] Dumping ftrace buffer:
[   31.540596]    (ftrace buffer empty)
[   31.544284] Modules linked in:
[   31.547795] CPU: 0 PID: 4186 Comm: syz-executor0 Not tainted 4.9.123-g8dd3fc2 #27
[   31.555392] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   31.564822] task: ffff8801d69a6000 task.stack: ffff8801d5d48000
[   31.570854] RIP: 0010:[<ffffffff836c8e30>]  [<ffffffff836c8e30>] l2tp_session_create+0xc60/0x16f0
[   31.580024] RSP: 0018:ffff8801d5d4fac0  EFLAGS: 00010246
[   31.585528] RAX: 0000000000000000 RBX: ffff8801bc5f0500 RCX: 1ffff1003ad34d1d
[   31.592839] RDX: 1ffff1003ae6ba10 RSI: ffff8801d69a68c8 RDI: ffff8801d735d080
[   31.600109] RBP: ffff8801d5d4fb60 R08: ffff8801d69a68e8 R09: 0000000000000000
[   31.607374] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d735cf58
[   31.614638] R13: 0000000000000000 R14: ffff8801d735cf00 R15: ffff8801d5d4fc78
[   31.621900] FS:  00007fbf245f8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   31.630214] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.636083] CR2: 0000000000000080 CR3: 00000001d6d8c000 CR4: 00000000001606f0
[   31.643335] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.650589] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.657930] Stack:
[   31.660071]  0000000000000201 ffffffff836ca141 ffff8801d5d4fae0 ffffffff81237f0d
[   31.668186]  ffff8801d735cf00 ffff8801bc5f0658 ffff8801d735cf58 ffff8801bc5f0650
[   31.676204]  ffff8801bc5f05b0 ffff8801d735cf20 0000000000000000 0000000000000000
[   31.684255] Call Trace:
[   31.686832]  [<ffffffff836ca141>] ? l2tp_session_get+0x1d1/0x790
[   31.692966]  [<ffffffff81237f0d>] ? trace_hardirqs_on+0xd/0x10
[   31.698930]  [<ffffffff836cdfe7>] pppol2tp_connect+0x10d7/0x18f0
[   31.705067]  [<ffffffff836ccf10>] ? pppol2tp_seq_show+0xc30/0xc30
[   31.711289]  [<ffffffff81cf90cf>] ? security_socket_connect+0x8f/0xc0
[   31.717857]  [<ffffffff8301e958>] SYSC_connect+0x1b8/0x300
[   31.723468]  [<ffffffff8301e7a0>] ? SYSC_bind+0x280/0x280
[   31.728990]  [<ffffffff812db939>] ? SyS_futex+0x229/0x310
[   31.734518]  [<ffffffff812db710>] ? do_futex+0x17c0/0x17c0
[   31.740131]  [<ffffffff83020830>] ? move_addr_to_kernel+0x50/0x50
[   31.746346]  [<ffffffff83021224>] SyS_connect+0x24/0x30
[   31.751694]  [<ffffffff83021200>] ? SyS_accept+0x30/0x30
[   31.757220]  [<ffffffff81006316>] do_syscall_64+0x1a6/0x490
[   31.762920]  [<ffffffff83a01c93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
[   31.769826] 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 
[   31.797170] RIP  [<ffffffff836c8e30>] l2tp_session_create+0xc60/0x16f0
[   31.803958]  RSP <ffff8801d5d4fac0>
[   31.807581] CR2: 0000000000000080
[   31.811939] ---[ end trace cd20793f6afd6869 ]---
[   31.816739] Kernel panic - not syncing: Fatal exception
[   31.822451] Dumping ftrace buffer:
[   31.825970]    (ftrace buffer empty)
[   31.829652] Kernel Offset: disabled
[   31.833251] Rebooting in 86400 seconds..