[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.853576] kasan: CONFIG_KASAN_INLINE enabled
[   33.859789] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   33.867445] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   33.873681] Modules linked in:
[   33.876876] CPU: 1 PID: 6329 Comm: syz-executor277 Not tainted 4.14.176-syzkaller #0
[   33.884746] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.894089] task: ffff88809868e100 task.stack: ffff888098758000
[   33.900148] RIP: 0010:vhost_chr_write_iter+0x434/0x1030
[   33.905486] RSP: 0018:ffff88809875fbf0 EFLAGS: 00010246
[   33.910826] RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000000000000
[   33.918172] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880820c0240
[   33.925445] RBP: ffff8880820c4948 R08: dffffc0000000000 R09: 0000000000000002
[   33.932724] R10: ffff88809875fbf0 R11: ffff88809868e100 R12: 0000000000000000
[   33.939997] R13: 0000000000000000 R14: ffffed1010418041 R15: ffff8880820c0180
[   33.947253] FS:  000000000093b880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
[   33.955477] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.961357] CR2: 0000000020000140 CR3: 0000000089e7c000 CR4: 00000000001406e0
[   33.968650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.975911] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.983272] Call Trace:
[   33.985857]  ? vhost_new_umem_range+0x680/0x680
[   33.990507]  ? lock_downgrade+0x6e0/0x6e0
[   33.994879]  ? iov_iter_init+0xa6/0x1c0
[   33.998843]  __vfs_write+0x44e/0x630
[   34.002671]  ? kernel_read+0x110/0x110
[   34.006549]  ? avc_policy_seqno+0x5/0x10
[   34.010604]  ? selinux_file_permission+0x7a/0x440
[   34.015454]  ? rw_verify_area+0xe1/0x2a0
[   34.019504]  vfs_write+0x192/0x4e0
[   34.023028]  SyS_write+0xf2/0x210
[   34.026462]  ? SyS_read+0x210/0x210
[   34.030193]  ? __do_page_fault+0x35b/0xb40
[   34.034408]  ? do_syscall_64+0x4c/0x640
[   34.038360]  ? SyS_read+0x210/0x210
[   34.041968]  do_syscall_64+0x1d5/0x640
[   34.045924]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   34.051114] RIP: 0033:0x4401a9
[   34.054300] RSP: 002b:00007ffc2fc2f558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   34.061986] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9
[   34.069237] RDX: 0000000000000048 RSI: 0000000020000280 RDI: 0000000000000003
[   34.076487] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   34.083737] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30
[   34.091104] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000
[   34.098364] Code: ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 0f 85 3e 0b 00 00 4d 8b af c0 00 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 e9 48 c1 e9 03 <80> 3c 11 00 0f 85 07 0b 00 00 49 8b 6d 00 48 85 ed 0f 84 1f 08 
[   34.117472] RIP: vhost_chr_write_iter+0x434/0x1030 RSP: ffff88809875fbf0
[   34.124919] ---[ end trace d03df4dccba657a1 ]---
[   34.129802] Kernel panic - not syncing: Fatal exception
[   34.136638] Kernel Offset: disabled
[   34.140266] Rebooting in 86400 seconds..