RHEL 9 fapolicyd blocks newly deployed binaries

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Application binaries fail to execute after deployment on hardened systems.

Environment & Reproduction

Execution denied errors occur despite correct file ownership and executable bits.

Root Cause Analysis

fapolicyd trust database missing entries or restrictive custom allow rules.

Quick Triage

Confirm service status and inspect recent denial events related to binary paths.

Step-by-Step Diagnosis

Use journalctl -u fapolicyd and policy logs to identify blocked executable metadata.

Solution – Primary Fix

Update fapolicyd rules or trust DB for approved signed binaries only.

Solution – Alternative Approaches

Differentiate SELinux AVC from fapolicyd denials to avoid incorrect remediation.

Verification & Acceptance Criteria

Reload policy safely and restart fapolicyd using controlled change windows.

Rollback Plan

Prefer dnf-managed packages where trust metadata is maintained automatically.

Prevention & Hardening

Record exception rationale and approval for each rule expansion.

Related Errors & Cross-Refs

Integrate trust updates into deployment pipelines before service restart.

Related tutorial: View the step-by-step tutorial for rhel-9.

View all rhel-9 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Verify binaries execute and no unauthorized files gain execution rights.