Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.442436] kasan: CONFIG_KASAN_INLINE enabled
[   28.447183] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   28.455705] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.461938] Modules linked in:
[   28.465114] CPU: 1 PID: 7982 Comm: syz-executor303 Not tainted 4.14.261-syzkaller #0
[   28.472967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.482297] task: ffff8880b49c6280 task.stack: ffff8880a3650000
[   28.488343] RIP: 0010:vhost_chr_write_iter+0x873/0x1100
[   28.493681] RSP: 0018:ffff8880a3657c00 EFLAGS: 00010246
[   28.499017] RAX: dffffc0000000000 RBX: ffff88808bd20140 RCX: 0000000000000000
[   28.506264] RDX: 0000000000000002 RSI: ffffffff8ba59570 RDI: ffff88808bd20200
[   28.513508] RBP: ffffed10117a4039 R08: 0000000000000000 R09: 0000000000000000
[   28.520754] R10: 0000000000000002 R11: ffff8880b49c6280 R12: 0000000000000002
[   28.528000] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff110146caf87
[   28.535247] FS:  00005555568a5300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   28.543563] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.549430] CR2: 000000002000014e CR3: 000000009a3a7000 CR4: 00000000003406e0
[   28.556684] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.563951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.571199] Call Trace:
[   28.573768]  ? log_write_hva+0x310/0x310
[   28.577826]  ? debug_check_no_obj_freed+0x2c0/0x680
[   28.582843]  ? lock_downgrade+0x740/0x740
[   28.586974]  ? iov_iter_init+0xa6/0x1c0
[   28.590936]  __vfs_write+0x44c/0x630
[   28.594646]  ? kernel_read+0x110/0x110
[   28.598513]  ? rw_verify_area+0xe1/0x2a0
[   28.602551]  vfs_write+0x17f/0x4d0
[   28.606068]  SyS_write+0xf2/0x210
[   28.609495]  ? SyS_read+0x210/0x210
[   28.613098]  ? __do_page_fault+0x159/0xad0
[   28.617309]  ? do_syscall_64+0x4c/0x640
[   28.621259]  ? SyS_read+0x210/0x210
[   28.624859]  do_syscall_64+0x1d5/0x640
[   28.628725]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   28.633891] RIP: 0033:0x7fbdf1095029
[   28.637578] RSP: 002b:00007ffd72423298 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   28.645263] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbdf1095029
[   28.652510] RDX: 0000000000000048 RSI: 0000000020000300 RDI: 0000000000000003
[   28.659757] RBP: 00007fbdf1059010 R08: 0000000000000000 R09: 0000000000000000
[   28.667014] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbdf10590a0
[   28.674260] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   28.681506] 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 
[   28.700659] RIP: vhost_chr_write_iter+0x873/0x1100 RSP: ffff8880a3657c00
[   28.715588] ---[ end trace eeadb8ad27a5479c ]---
[   28.720473] Kernel panic - not syncing: Fatal exception
[   28.725899] Kernel Offset: disabled
[   28.729510] Rebooting in 86400 seconds..