[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[  OK  ] Started Load/Save RF Kill Switch Status.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   36.223136] kasan: CONFIG_KASAN_INLINE enabled
[   36.228002] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   36.236535] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   36.242769] Modules linked in:
[   36.245948] CPU: 0 PID: 8017 Comm: syz-executor451 Not tainted 4.14.213-syzkaller #0
[   36.253802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.263149] task: ffff888095af0480 task.stack: ffff888095bf8000
[   36.269188] RIP: 0010:vhost_chr_write_iter+0x863/0x10f0
[   36.274524] RSP: 0018:ffff888095bffc00 EFLAGS: 00010246
[   36.279862] RAX: dffffc0000000000 RBX: ffff888093b00140 RCX: 0000000000000000
[   36.287111] RDX: 0000000000000002 RSI: ffffffff8ba44570 RDI: ffff888093b00200
[   36.294356] RBP: ffffed1012760039 R08: 0000000000000000 R09: 0000000000000000
[   36.301604] R10: 0000000000000002 R11: ffff888095af0480 R12: 0000000000000002
[   36.308854] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11012b7ff87
[   36.316132] FS:  0000000001421880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[   36.324345] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.330207] CR2: 00007f14287a0000 CR3: 00000000ac205000 CR4: 00000000001406f0
[   36.337461] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.344711] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.352320] Call Trace:
[   36.354887]  ? log_write_hva+0x310/0x310
[   36.358945]  ? debug_check_no_obj_freed+0x2c0/0x674
[   36.363955]  ? lock_downgrade+0x740/0x740
[   36.368081]  ? iov_iter_init+0xa6/0x1c0
[   36.372038]  __vfs_write+0x44c/0x630
[   36.375729]  ? kernel_read+0x110/0x110
[   36.379680]  ? rw_verify_area+0xe1/0x2a0
[   36.383716]  vfs_write+0x17f/0x4d0
[   36.387247]  SyS_write+0xf2/0x210
[   36.391037]  ? SyS_read+0x210/0x210
[   36.394652]  ? __do_page_fault+0x159/0xad0
[   36.398874]  ? do_syscall_64+0x4c/0x640
[   36.402838]  ? SyS_read+0x210/0x210
[   36.406445]  do_syscall_64+0x1d5/0x640
[   36.410350]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   36.415519] RIP: 0033:0x440279
[   36.418699] RSP: 002b:00007fff4e5bbde8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   36.426384] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279
[   36.433649] RDX: 0000000000000048 RSI: 0000000020000080 RDI: 0000000000000003
[   36.440993] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   36.448240] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80
[   36.455502] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000
[   36.462883] Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 cd 06 00 00 4c 8b ab c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e9 48 c1 e9 03 <80> 3c 01 00 0f 85 96 06 00 00 49 8b 6d 00 48 85 ed 0f 84 e4 03 
[   36.481974] RIP: vhost_chr_write_iter+0x863/0x10f0 RSP: ffff888095bffc00
[   36.489598] ---[ end trace 337d128460d0c8d5 ]---
[   36.494369] Kernel panic - not syncing: Fatal exception
[   36.500166] Kernel Offset: disabled
[   36.503796] Rebooting in 86400 seconds..