Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.16' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   38.959153] ------------[ cut here ]------------
[   38.965012] WARNING: CPU: 1 PID: 8105 at drivers/vhost/vhost.c:657 vhost_dev_cleanup.cold+0x11/0x18
[   38.975316] Kernel panic - not syncing: panic_on_warn set ...
[   38.975316] 
[   38.982800] CPU: 1 PID: 8105 Comm: syz-executor156 Not tainted 4.19.211-syzkaller #0
[   38.990992] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.000439] Call Trace:
[   39.003049]  dump_stack+0x1fc/0x2ef
[   39.006689]  panic+0x26a/0x50e
[   39.009956]  ? __warn_printk+0xf3/0xf3
[   39.014532]  ? vhost_dev_cleanup.cold+0x11/0x18
[   39.019225]  ? __probe_kernel_read+0x130/0x1b0
[   39.024319]  ? __warn.cold+0x5/0x5a
[   39.028075]  ? __warn+0xe4/0x200
[   39.031538]  ? vhost_dev_cleanup.cold+0x11/0x18
[   39.036825]  __warn.cold+0x20/0x5a
[   39.040442]  ? vhost_dev_cleanup.cold+0x11/0x18
[   39.045214]  report_bug+0x262/0x2b0
[   39.048920]  do_error_trap+0x1d7/0x310
[   39.052801]  ? math_error+0x310/0x310
[   39.056614]  ? __irq_work_queue_local+0x101/0x160
[   39.061464]  ? irq_work_queue+0x29/0x80
[   39.065436]  ? error_entry+0x72/0xd0
[   39.069140]  ? trace_hardirqs_off_caller+0x6e/0x210
[   39.074525]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   39.079660]  invalid_op+0x14/0x20
[   39.083123] RIP: 0010:vhost_dev_cleanup.cold+0x11/0x18
[   39.088394] Code: 89 48 8d 70 02 e8 61 f8 ff ff e9 cd 6b 16 fe 48 89 ef e8 9d 03 88 f9 eb a1 e8 c6 27 52 f9 48 c7 c7 e0 25 3d 89 e8 25 59 e3 ff <0f> 0b e9 f0 79 17 fe e8 ae 27 52 f9 48 8d 7d 04 ba ff ff 37 00 48
[   39.107522] RSP: 0018:ffff8880951bfc48 EFLAGS: 00010286
[   39.113772] RAX: 0000000000000024 RBX: ffff88808be60140 RCX: 0000000000000000
[   39.121366] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012a37f7b
[   39.129169] RBP: ffff88808be64988 R08: 0000000000000024 R09: 0000000000000000
[   39.136450] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808be601f8
[   39.143821] R13: ffff88808be60248 R14: ffff88808be601f8 R15: ffff8880aa5be6f8
[   39.151383]  ? vprintk_func+0x81/0x180
[   39.155401]  ? vhost_dev_cleanup.cold+0x11/0x18
[   39.160164]  ? vhost_vsock_dev_compat_ioctl+0x30/0x30
[   39.165635]  vhost_vsock_dev_release+0x373/0x4b0
[   39.170625]  ? ima_file_free+0xb6/0x460
[   39.174617]  ? vhost_vsock_dev_compat_ioctl+0x30/0x30
[   39.179797]  __fput+0x2ce/0x890
[   39.183069]  task_work_run+0x148/0x1c0
[   39.186969]  do_exit+0xbf3/0x2be0
[   39.190532]  ? lock_downgrade+0x720/0x720
[   39.194851]  ? mm_update_next_owner+0x650/0x650
[   39.199532]  ? up_read+0x17/0x110
[   39.203226]  ? __do_page_fault+0x180/0xd60
[   39.207556]  do_group_exit+0x125/0x310
[   39.211461]  __x64_sys_exit_group+0x3a/0x50
[   39.216133]  do_syscall_64+0xf9/0x620
[   39.219929]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   39.225461] RIP: 0033:0x7ff087209bb9
[   39.229181] Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00
[   39.248205] RSP: 002b:00007ffe3dccedc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   39.256276] RAX: ffffffffffffffda RBX: 00007ff08727e330 RCX: 00007ff087209bb9
[   39.263721] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[   39.271094] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00007ffe3dccefb8
[   39.278442] R10: 00007ffe3dccefb8 R11: 0000000000000246 R12: 00007ff08727e330
[   39.285942] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[   39.293866] Kernel Offset: disabled
[   39.297563] Rebooting in 86400 seconds..