Error message not explicit enough

[qjerome]

The following happens because the file executed got deleted before the userland program could retrieve its hash.
Currently an error message is reported. Either make the error message more explicit or generate an event when such a case happens.

Example:

  "data": {
    "ancestors": "/usr/lib/systemd/systemd|/usr/sbin/sshd|/usr/sbin/sshd|/usr/sbin/sshd|/usr/bin/bash|/usr/bin/sudo|/usr/bin/su|/usr/bin/bash|/tmp/bpfdoor.mwr|/usr/bin/dash",
    "parent_exe": "/usr/bin/dash",
    "command_line": "/dev/shm/kdmtmpflush --init",
    "exe": {
      "file": "/dev/shm/kdmtmpflush",
      "md5": "",
      "sha1": "",
      "sha256": "",
      "sha512": "",
      "size": 0,
      "error": "hash not found"
    },
    "interpreter": {
      "file": "/dev/shm/kdmtmpflush",
      "md5": "",
      "sha1": "",
      "sha256": "",
      "sha512": "",
      "size": 0,
      "error": "hash not found"
    }
  }