Oracle Linux 10 – SELinux AVC denials after update break service startup – Fix & Prevention

📖 ~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

Service starts only when SELinux is permissive and fails in enforcing mode.

Environment & Reproduction

Occurs after package updates or deployment to nonstandard paths.

getenforce
systemctl status myapp
journalctl -xe | tail -n 40

Root Cause Analysis

Incorrect file contexts or missing local policy allows trigger denials.

Quick Triage

Collect AVC evidence and impacted object contexts quickly.

ausearch -m avc -ts recent
ls -lZ /opt/myapp
sealert -a /var/log/audit/audit.log | head -n 40

Step-by-Step Diagnosis

Map denials to specific transitions and labels.

ps -eZ | grep myapp
matchpathcon /opt/myapp/bin/myapp
ausearch -m avc -c myapp -ts recent

Solution – Primary Fix

Restore contexts and load minimal local policy module.

restorecon -Rv /opt/myapp
audit2allow -a -M myapp_local
semodule -i myapp_local.pp
systemctl restart myapp

Solution – Alternative Approaches

Perform full relabel during maintenance if drift is widespread.

touch /.autorelabel
reboot

Verification & Acceptance Criteria

Service runs in enforcing mode and new AVC events stop.

getenforce
systemctl is-active myapp
ausearch -m avc -ts recent

Rollback Plan

Remove local module and restore previous package if behavior regresses.

semodule -r myapp_local || true
dnf downgrade -y myapp
systemctl restart myapp

Prevention & Hardening

Integrate SELinux label checks into deployment pipelines.

semanage fcontext -l | grep myapp
restorecon -Rv /opt/myapp

Related Errors & Cross-Refs

Linked to custom paths and container bind mount labeling issues.

Related tutorial: View the step-by-step tutorial for oracle-linux-10.

View all oracle-linux-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Oracle Linux SELinux troubleshooting and policy module guidance.