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

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   30.117057] kasan: CONFIG_KASAN_INLINE enabled
[   30.121858] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   30.130375] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   30.136718] Modules linked in:
[   30.139896] CPU: 0 PID: 8004 Comm: syz-executor173 Not tainted 4.14.203-syzkaller #0
[   30.147987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   30.157361] task: ffff8880b36004c0 task.stack: ffff8880b2d58000
[   30.163511] RIP: 0010:vhost_chr_write_iter+0x863/0x10f0
[   30.169032] RSP: 0018:ffff8880b2d5fc00 EFLAGS: 00010246
[   30.174504] RAX: dffffc0000000000 RBX: ffff888092660140 RCX: 0000000000000000
[   30.181844] RDX: 0000000000000002 RSI: ffffffff8ba43d90 RDI: ffff888092660200
[   30.189098] RBP: ffffed10124cc039 R08: 0000000000000000 R09: 0000000000000000
[   30.196835] R10: 0000000000000002 R11: ffff8880b36004c0 R12: 0000000000000002
[   30.204176] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff110165abf87
[   30.211430] FS:  0000000000dcb880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[   30.219831] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.225734] CR2: 00007f0bb4c45000 CR3: 00000000aa8a0000 CR4: 00000000001406f0
[   30.233084] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.240451] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.247706] Call Trace:
[   30.250285]  ? log_write_hva+0x310/0x310
[   30.254367]  ? debug_check_no_obj_freed+0x2c0/0x674
[   30.259583]  ? lock_downgrade+0x740/0x740
[   30.263718]  ? iov_iter_init+0xa6/0x1c0
[   30.267797]  __vfs_write+0x44c/0x630
[   30.271498]  ? kernel_read+0x110/0x110
[   30.275376]  ? rw_verify_area+0xe1/0x2a0
[   30.279421]  vfs_write+0x17f/0x4d0
[   30.282949]  SyS_write+0xf2/0x210
[   30.286387]  ? SyS_read+0x210/0x210
[   30.290001]  ? __do_page_fault+0x159/0xad0
[   30.294222]  ? do_syscall_64+0x4c/0x640
[   30.298176]  ? SyS_read+0x210/0x210
[   30.301828]  do_syscall_64+0x1d5/0x640
[   30.305705]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   30.310881] RIP: 0033:0x440279
[   30.314051] RSP: 002b:00007ffd5cc315b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   30.321742] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279
[   30.329034] RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0000000000000003
[   30.336323] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   30.343704] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80
[   30.351044] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000
[   30.358338] 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 
[   30.377506] RIP: vhost_chr_write_iter+0x863/0x10f0 RSP: ffff8880b2d5fc00
[   30.384971] ---[ end trace 0d3235df4ff98887 ]---
[   30.389854] Kernel panic - not syncing: Fatal exception
[   30.395945] Kernel Offset: disabled
[   30.399566] Rebooting in 86400 seconds..