[  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 '10.128.0.102' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.995020] kasan: CONFIG_KASAN_INLINE enabled
[   28.999820] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   29.007421] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   29.013641] Modules linked in:
[   29.016829] CPU: 0 PID: 7988 Comm: syz-executor355 Not tainted 4.14.282-syzkaller #0
[   29.024692] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.034024] task: ffff88809b4d2640 task.stack: ffff88808d560000
[   29.040071] RIP: 0010:vhost_chr_write_iter+0x873/0x1100
[   29.045418] RSP: 0018:ffff88808d567c00 EFLAGS: 00010246
[   29.050765] RAX: dffffc0000000000 RBX: ffff88808d460140 RCX: 0000000000000000
[   29.058008] RDX: 0000000000000002 RSI: ffffffff8ba61180 RDI: ffff88808d460200
[   29.065251] RBP: ffffed1011a8c039 R08: 0000000000000000 R09: 0000000000000000
[   29.072497] R10: 0000000000000002 R11: ffff88809b4d2640 R12: 0000000000000002
[   29.079751] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11011aacf87
[   29.086996] FS:  000055555669d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[   29.095208] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.101064] CR2: 000000002000010e CR3: 00000000af205000 CR4: 00000000003406f0
[   29.108397] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.115644] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.122890] Call Trace:
[   29.125470]  ? log_write_hva+0x310/0x310
[   29.129520]  ? debug_check_no_obj_freed+0x2c0/0x680
[   29.134513]  ? lock_downgrade+0x740/0x740
[   29.138646]  ? iov_iter_init+0xa6/0x1c0
[   29.142594]  __vfs_write+0x44c/0x630
[   29.146289]  ? kernel_read+0x110/0x110
[   29.150149]  ? rw_verify_area+0xe1/0x2a0
[   29.154184]  vfs_write+0x17f/0x4d0
[   29.157697]  SyS_write+0xf2/0x210
[   29.161124]  ? SyS_read+0x210/0x210
[   29.164891]  ? __do_page_fault+0x159/0xad0
[   29.169110]  ? do_syscall_64+0x4c/0x640
[   29.173073]  ? SyS_read+0x210/0x210
[   29.176692]  do_syscall_64+0x1d5/0x640
[   29.180580]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   29.185754] RIP: 0033:0x7f6963493029
[   29.189446] RSP: 002b:00007ffe6e406168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   29.197130] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6963493029
[   29.204381] RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000003
[   29.211629] RBP: 00007f6963457010 R08: 0000000000000000 R09: 0000000000000000
[   29.218882] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f69634570a0
[   29.226126] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   29.233375] Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 c6 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 8f 06 00 00 49 8b 6d 00 48 85 ed 0f 84 e4 03 
[   29.252552] RIP: vhost_chr_write_iter+0x873/0x1100 RSP: ffff88808d567c00
[   29.259754] ---[ end trace a923938eb65c927a ]---
[   29.264517] Kernel panic - not syncing: Fatal exception
[   29.270084] Kernel Offset: disabled
[   29.273722] Rebooting in 86400 seconds..