INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] 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[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.125885] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[   47.133923] IP: kernel_sock_shutdown+0x4a/0xc0
[   47.138492] PGD 800000019a440067 P4D 800000019a440067 PUD 199741067 PMD 0 
[   47.145522] Oops: 0000 [#1] SMP PTI
[   47.149136] Dumping ftrace buffer:
[   47.152660]    (ftrace buffer empty)
[   47.156357] Modules linked in:
[   47.159551] CPU: 1 PID: 4499 Comm: syzkaller445300 Not tainted 4.16.0+ #85
[   47.166547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.175910] RIP: 0010:kernel_sock_shutdown+0x4a/0xc0
[   47.181002] RSP: 0018:ffff88019a4afd20 EFLAGS: 00010246
[   47.186387] RAX: ffffffff87b2a5fd RBX: ffff8801cc2ae198 RCX: ffff8801cc2ad880
[   47.193644] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
[   47.200910] RBP: ffff88019a4afd60 R08: 0000000001080020 R09: 0000000000000002
[   47.208170] R10: 0000000000000000 R11: 00000000fa8c75bc R12: 0000000000000000
[   47.215430] R13: 0000000000000002 R14: 0000000000000028 R15: 0000000000000000
[   47.222691] FS:  00007fb3f0752700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[   47.230907] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.236778] CR2: 0000000000000028 CR3: 0000000198f1a000 CR4: 00000000001406e0
[   47.244064] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.251326] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.258582] Call Trace:
[   47.261175]  smc_shutdown+0x674/0x810
[   47.265001]  ? smc_listen+0xe70/0xe70
[   47.268833]  SYSC_shutdown+0x2a3/0x400
[   47.272758]  SyS_shutdown+0x44/0x60
[   47.276407]  do_syscall_64+0x309/0x430
[   47.280295]  ? SYSC_getsockopt+0x570/0x570
[   47.284525]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   47.289702] RIP: 0033:0x4454a9
[   47.292878] RSP: 002b:00007fb3f0751db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030
[   47.300583] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004454a9
[   47.307841] RDX: 00000000004454a9 RSI: 0000000000000002 RDI: 0000000000000003
[   47.315106] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000
[   47.322368] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   47.329640] R13: 00007fffb97ba88f R14: 00007fb3f07529c0 R15: 0000000000000001
[   47.336905] Code: 8b 40 08 89 45 d0 8b 83 90 0c 00 00 89 45 d4 4c 8b 23 44 8b bb 88 0c 00 00 e8 73 7e ae f9 4c 89 75 c0 4d 8d 76 28 4d 85 e4 75 5d <4d> 8b 2e 4c 89 f7 e8 4b f1 05 fa 49 83 c5 60 48 83 38 00 75 52 
[   47.356293] RIP: kernel_sock_shutdown+0x4a/0xc0 RSP: ffff88019a4afd20
[   47.362862] CR2: 0000000000000028
[   47.366460] ---[ end trace 8ea1bf117270a21b ]---
[   47.371270] Kernel panic - not syncing: Fatal exception
[   47.377001] Dumping ftrace buffer:
[   47.380523]    (ftrace buffer empty)
[   47.384221] Kernel Offset: disabled
[   47.387841] Rebooting in 86400 seconds..