[Auditbeat] system/process metricset fails to hash executables on i386 arch

[adriansr]

For confirmed bugs, please report:

• Version: 7.2.0
• Operating System: Linux 32bit
• Discuss Forum URL:
• Steps to Reproduce:

Run auditbeat with system/process metricset enabled (default).

The following errors are published:

{
  "@timestamp": "2019-07-20T00:11:30.713Z",
  "@metadata": {
    "beat": "auditbeat",
    "type": "_doc",
    "version": "7.2.0"
  },
  "event": {
    "dataset": "process",
    "kind": "error",
    "action": "process_error",
    "module": "system"
  },
  "message": "ERROR for PID 19010: failed to hash executable /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat for PID 19010: failed to stat file /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat: stat /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat: operation not permitted",
  "error": {
    "message": "failed to hash executable /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat for PID 19010: failed to stat file /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat: stat /home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat: operation not permitted"
  },
  "ecs": {
    "version": "1.0.0"
  },
  "host": {
    "name": "vagrant-ubuntu-trusty-32"
  },
  "service": {
    "type": "system"
  },
  "user": {
    "id": "0",
    "group": {
      "name": "root",
      "id": "0"
    },
    "effective": {
      "id": "0",
      "group": {
        "id": "0"
      }
    },
    "saved": {
      "id": "0",
      "group": {
        "id": "0"
      }
    },
    "name": "root"
  },
  "agent": {
    "type": "auditbeat",
    "ephemeral_id": "709326f3-ff1a-4fdc-b298-85d21834ad3e",
    "hostname": "vagrant-ubuntu-trusty-32",
    "id": "f0a68bf7-bee1-42f5-b502-d6bac72fe7da",
    "version": "7.2.0"
  },
  "process": {
    "start": "2019-07-20T00:11:29.700Z",
    "entity_id": "jzVfToq+d1Kb/dR0",
    "name": "auditbeat",
    "args": [
      "./auditbeat",
      "run",
      "-e",
      "-d",
      "*",
      "-strict.perms=false"
    ],
    "pid": 19010,
    "ppid": 19009,
    "working_directory": "/home/vagrant/auditbeat-7.2.0-linux-x86",
    "executable": "/home/vagrant/auditbeat-7.2.0-linux-x86/auditbeat"
  }
}