[  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 '10.128.0.241' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   27.572716] kasan: CONFIG_KASAN_INLINE enabled
[   27.577361] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   27.584944] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   27.591159] Modules linked in:
[   27.594330] CPU: 0 PID: 7977 Comm: syz-executor295 Not tainted 4.14.272-syzkaller #0
[   27.602182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   27.611523] task: ffff8880b4536440 task.stack: ffff888099f28000
[   27.617557] RIP: 0010:vhost_chr_write_iter+0x873/0x1100
[   27.622888] RSP: 0018:ffff888099f2fc00 EFLAGS: 00010246
[   27.628225] RAX: dffffc0000000000 RBX: ffff888091620140 RCX: 0000000000000000
[   27.635466] RDX: 0000000000000002 RSI: ffffffff8ba5eaf0 RDI: ffff888091620200
[   27.642709] RBP: ffffed10122c4039 R08: 0000000000000000 R09: 0000000000000000
[   27.649951] R10: 0000000000000002 R11: ffff8880b4536440 R12: 0000000000000002
[   27.657194] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff110133e5f87
[   27.664437] FS:  00005555557ed300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[   27.672633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.678488] CR2: 000000002000008e CR3: 00000000af429000 CR4: 00000000003406f0
[   27.685734] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.692975] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.700215] Call Trace:
[   27.702784]  ? log_write_hva+0x310/0x310
[   27.706820]  ? debug_check_no_obj_freed+0x2c0/0x680
[   27.711816]  ? lock_downgrade+0x740/0x740
[   27.716050]  ? iov_iter_init+0xa6/0x1c0
[   27.720002]  __vfs_write+0x44c/0x630
[   27.723698]  ? kernel_read+0x110/0x110
[   27.727565]  ? rw_verify_area+0xe1/0x2a0
[   27.731607]  vfs_write+0x17f/0x4d0
[   27.735131]  SyS_write+0xf2/0x210
[   27.738562]  ? SyS_read+0x210/0x210
[   27.742174]  ? __do_page_fault+0x159/0xad0
[   27.746395]  ? do_syscall_64+0x4c/0x640
[   27.750346]  ? SyS_read+0x210/0x210
[   27.753951]  do_syscall_64+0x1d5/0x640
[   27.757821]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   27.762987] RIP: 0033:0x7eff62a59029
[   27.766673] RSP: 002b:00007fff0877fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   27.774350] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007eff62a59029
[   27.781593] RDX: 0000000000000048 RSI: 0000000020001100 RDI: 0000000000000003
[   27.788840] RBP: 00007eff62a1d010 R08: 0000000000000000 R09: 0000000000000000
[   27.796088] R10: 0000000000000000 R11: 0000000000000246 R12: 00007eff62a1d0a0
[   27.803328] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[   27.810574] 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 
[   27.829654] RIP: vhost_chr_write_iter+0x873/0x1100 RSP: ffff888099f2fc00
[   27.836829] ---[ end trace bb355725f74e19a9 ]---
[   27.841569] Kernel panic - not syncing: Fatal exception
[   27.846984] Kernel Offset: disabled
[   27.850608] Rebooting in 86400 seconds..