Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.353894] kasan: CONFIG_KASAN_INLINE enabled
[   28.358913] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   28.366391] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.372611] Modules linked in:
[   28.375872] CPU: 1 PID: 7989 Comm: syz-executor417 Not tainted 4.14.236-syzkaller #0
[   28.383727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.393060] task: ffff88809592a400 task.stack: ffff8880b30e8000
[   28.399114] RIP: 0010:vhost_chr_write_iter+0x863/0x10f0
[   28.404463] RSP: 0018:ffff8880b30efc00 EFLAGS: 00010246
[   28.409800] RAX: dffffc0000000000 RBX: ffff88808d920140 RCX: 0000000000000000
[   28.417043] RDX: 0000000000000002 RSI: ffffffff8ba4bee0 RDI: ffff88808d920200
[   28.424288] RBP: ffffed1011b24039 R08: 0000000000000000 R09: 0000000000000000
[   28.431539] R10: 0000000000000002 R11: ffff88809592a400 R12: 0000000000000002
[   28.438787] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1101661df87
[   28.446170] FS:  0000000001597300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   28.454595] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.460452] CR2: 000000002000050e CR3: 00000000aedda000 CR4: 00000000001406e0
[   28.467804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.475054] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.482301] Call Trace:
[   28.484886]  ? log_write_hva+0x310/0x310
[   28.488926]  ? debug_check_no_obj_freed+0x2c0/0x680
[   28.493929]  ? lock_downgrade+0x740/0x740
[   28.498051]  ? iov_iter_init+0xa6/0x1c0
[   28.502014]  __vfs_write+0x44c/0x630
[   28.505706]  ? kernel_read+0x110/0x110
[   28.509571]  ? rw_verify_area+0xe1/0x2a0
[   28.513607]  vfs_write+0x17f/0x4d0
[   28.517151]  SyS_write+0xf2/0x210
[   28.520678]  ? SyS_read+0x210/0x210
[   28.524285]  ? __do_page_fault+0x159/0xad0
[   28.528496]  ? do_syscall_64+0x4c/0x640
[   28.532450]  ? SyS_read+0x210/0x210
[   28.536054]  do_syscall_64+0x1d5/0x640
[   28.539920]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   28.545086] RIP: 0033:0x43ee99
[   28.548259] RSP: 002b:00007fff6747d198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   28.556029] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99
[   28.563284] RDX: 0000000000000048 RSI: 0000000020000640 RDI: 0000000000000003
[   28.570719] RBP: 0000000000402e80 R08: 0000000000000000 R09: 0000000000400488
[   28.578124] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402f10
[   28.585381] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
[   28.592635] 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 
[   28.611724] RIP: vhost_chr_write_iter+0x863/0x10f0 RSP: ffff8880b30efc00
[   28.620733] ---[ end trace f30f01dc217d1a20 ]---
[   28.625669] Kernel panic - not syncing: Fatal exception
[   28.632240] Kernel Offset: disabled
[   28.636025] Rebooting in 86400 seconds..