Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   27.351874] kasan: CONFIG_KASAN_INLINE enabled
[   27.356572] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   27.364964] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.371224] Modules linked in:
[   27.374411] CPU: 1 PID: 8016 Comm: syz-executor325 Not tainted 4.14.209-syzkaller #0
[   27.382265] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.391596] task: ffff88809493a340 task.stack: ffff888094930000
[   27.397636] RIP: 0010:vhost_chr_write_iter+0x863/0x10f0
[   27.402978] RSP: 0018:ffff888094937c00 EFLAGS: 00010246
[   27.408319] RAX: dffffc0000000000 RBX: ffff88808d7a0140 RCX: 0000000000000000
[   27.415581] RDX: 0000000000000002 RSI: ffffffff8ba43180 RDI: ffff88808d7a0200
[   27.422847] RBP: ffffed1011af4039 R08: 0000000000000000 R09: 0000000000000000
[   27.430113] R10: 0000000000000002 R11: ffff88809493a340 R12: 0000000000000002
[   27.437360] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff11012926f87
[   27.444624] FS:  0000000002147880(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   27.452912] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.458784] CR2: 0000000020000000 CR3: 00000000a5e66000 CR4: 00000000001406e0
[   27.466046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.473321] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.480569] Call Trace:
[   27.483171]  ? log_write_hva+0x310/0x310
[   27.487208]  ? debug_check_no_obj_freed+0x2c0/0x674
[   27.492208]  ? lock_downgrade+0x740/0x740
[   27.496332]  ? iov_iter_init+0xa6/0x1c0
[   27.500319]  __vfs_write+0x44c/0x630
[   27.504010]  ? kernel_read+0x110/0x110
[   27.507898]  ? rw_verify_area+0xe1/0x2a0
[   27.511934]  vfs_write+0x17f/0x4d0
[   27.515543]  SyS_write+0xf2/0x210
[   27.518977]  ? SyS_read+0x210/0x210
[   27.522581]  ? __do_page_fault+0x159/0xad0
[   27.526792]  ? do_syscall_64+0x4c/0x640
[   27.530742]  ? SyS_read+0x210/0x210
[   27.534348]  do_syscall_64+0x1d5/0x640
[   27.538230]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   27.543395] RIP: 0033:0x440279
[   27.546595] RSP: 002b:00007ffe0e405ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   27.554311] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279
[   27.561557] RDX: 0000000000000048 RSI: 0000000020000040 RDI: 0000000000000003
[   27.569186] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   27.576441] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80
[   27.583879] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000
[   27.592418] 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 
[   27.611596] RIP: vhost_chr_write_iter+0x863/0x10f0 RSP: ffff888094937c00
[   27.619074] ---[ end trace 47d54bae1faa128a ]---
[   27.623878] Kernel panic - not syncing: Fatal exception
[   27.629966] Kernel Offset: disabled
[   27.633782] Rebooting in 86400 seconds..