[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.72' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   32.299963] kasan: CONFIG_KASAN_INLINE enabled
[   32.304728] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   32.313137] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   32.319382] Modules linked in:
[   32.322577] CPU: 1 PID: 7971 Comm: syz-executor485 Not tainted 4.14.228-syzkaller #0
[   32.330444] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   32.339772] task: ffff8880b3f16640 task.stack: ffff888092068000
[   32.345810] RIP: 0010:vhost_chr_write_iter+0x863/0x10f0
[   32.351146] RSP: 0018:ffff88809206fc00 EFLAGS: 00010246
[   32.356482] RAX: dffffc0000000000 RBX: ffff88808d7a0140 RCX: 0000000000000000
[   32.363726] RDX: 0000000000000002 RSI: ffffffff8ba48c40 RDI: ffff88808d7a0200
[   32.370985] RBP: ffffed1011af4039 R08: 0000000000000000 R09: 0000000000000000
[   32.378227] R10: 0000000000000002 R11: ffff8880b3f16640 R12: 0000000000000002
[   32.385475] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff1101240df87
[   32.392737] FS:  00000000020b2300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   32.400933] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.406788] CR2: 00000000200000ce CR3: 00000000abefb000 CR4: 00000000001406e0
[   32.414048] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.421311] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   32.428553] Call Trace:
[   32.431136]  ? log_write_hva+0x310/0x310
[   32.435187]  ? debug_check_no_obj_freed+0x2c0/0x680
[   32.440458]  ? lock_downgrade+0x740/0x740
[   32.444590]  ? iov_iter_init+0xa6/0x1c0
[   32.448541]  __vfs_write+0x44c/0x630
[   32.452231]  ? kernel_read+0x110/0x110
[   32.456099]  ? rw_verify_area+0xe1/0x2a0
[   32.460132]  vfs_write+0x17f/0x4d0
[   32.463662]  SyS_write+0xf2/0x210
[   32.467104]  ? SyS_read+0x210/0x210
[   32.470709]  ? __do_page_fault+0x159/0xad0
[   32.474920]  ? do_syscall_64+0x4c/0x640
[   32.478880]  ? SyS_read+0x210/0x210
[   32.482485]  do_syscall_64+0x1d5/0x640
[   32.486363]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   32.491527] RIP: 0033:0x43ee99
[   32.494690] RSP: 002b:00007ffd238f04f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   32.502370] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99
[   32.509625] RDX: 0000000000000048 RSI: 0000000020001300 RDI: 0000000000000003
[   32.516883] RBP: 0000000000402e80 R08: 0000000000000000 R09: 0000000000400488
[   32.524143] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402f10
[   32.531387] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
[   32.538644] 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 
[   32.557720] RIP: vhost_chr_write_iter+0x863/0x10f0 RSP: ffff88809206fc00
[   32.570945] ---[ end trace 2e243a9599a04225 ]---
[   32.575718] Kernel panic - not syncing: Fatal exception
[   32.581632] Kernel Offset: disabled
[   32.585243] Rebooting in 86400 seconds..