Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.125' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   26.899819] kasan: CONFIG_KASAN_INLINE enabled
[   26.904585] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   26.912320] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   26.918544] Modules linked in:
[   26.921736] CPU: 1 PID: 7982 Comm: syz-executor369 Not tainted 4.14.268-syzkaller #0
[   26.929589] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.938932] task: ffff88809e21e200 task.stack: ffff88808dab0000
[   26.944968] RIP: 0010:vhost_chr_write_iter+0x873/0x1100
[   26.950301] RSP: 0018:ffff88808dab7c00 EFLAGS: 00010246
[   26.955637] RAX: dffffc0000000000 RBX: ffff888091600140 RCX: 0000000000000000
[   26.962878] RDX: 0000000000000002 RSI: ffffffff8ba5dd90 RDI: ffff888091600200
[   26.970141] RBP: ffffed10122c0039 R08: 0000000000000000 R09: 0000000000000000
[   26.977397] R10: 0000000000000002 R11: ffff88809e21e200 R12: 0000000000000002
[   26.984655] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11011b56f87
[   26.991899] FS:  0000555555649300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   27.000104] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.005968] CR2: 000000002000004e CR3: 00000000b4b93000 CR4: 00000000003406e0
[   27.013213] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.020455] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.027696] Call Trace:
[   27.030262]  ? log_write_hva+0x310/0x310
[   27.034311]  ? debug_check_no_obj_freed+0x2c0/0x680
[   27.039302]  ? lock_downgrade+0x740/0x740
[   27.043421]  ? iov_iter_init+0xa6/0x1c0
[   27.047380]  __vfs_write+0x44c/0x630
[   27.051063]  ? kernel_read+0x110/0x110
[   27.054929]  ? rw_verify_area+0xe1/0x2a0
[   27.058977]  vfs_write+0x17f/0x4d0
[   27.062492]  SyS_write+0xf2/0x210
[   27.066027]  ? SyS_read+0x210/0x210
[   27.069645]  ? __do_page_fault+0x159/0xad0
[   27.073867]  ? do_syscall_64+0x4c/0x640
[   27.077828]  ? SyS_read+0x210/0x210
[   27.081428]  do_syscall_64+0x1d5/0x640
[   27.085294]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   27.090459] RIP: 0033:0x7efd570a6029
[   27.094144] RSP: 002b:00007fff02bb8dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   27.101826] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efd570a6029
[   27.109084] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000003
[   27.116330] RBP: 00007efd5706a010 R08: 0000000000000000 R09: 0000000000000000
[   27.123608] R10: 0000000000000000 R11: 0000000000000246 R12: 00007efd5706a0a0
[   27.130853] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   27.138099] 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 
[   27.157176] RIP: vhost_chr_write_iter+0x873/0x1100 RSP: ffff88808dab7c00
[   27.164682] ---[ end trace 4fbea6f5feb16977 ]---
[   27.169435] Kernel panic - not syncing: Fatal exception
[   27.174957] Kernel Offset: disabled
[   27.178565] Rebooting in 86400 seconds..