Bug 2535630
| Summary: | SELinux: tuned_t incorrectly requests mac_admin and is mislabeled as "chcon" although chcon is never executed | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | jmtalpin |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 44 | CC: | dwalsh, lvrabec, mmalik, omosnacek, pkoncity, vmojzis, zpytela |
| Target Milestone: | --- | Keywords: | SELinux |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2026-09-18 19:10:39 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
kernel 7.2.5-200.fc44.x86_64 selinux-policy-targeted-44.9-1.fc44.noarch This is actually a deliberate action of bootc *** This bug has been marked as a duplicate of bug 2533850 *** |
On Fedora 44/45, SELinux repeatedly logs AVCs where the domain tuned_t attempts to acquire the mac_admin capability (class capability2). These AVCs are labeled under comm="chcon", but: - no chcon binary is executed, - no tuned script or plugin contains chcon, - tuned_t should never request mac_admin, - the operation appears to be an internal kernel capability request mislabeled by SELinux. This strongly suggests a policy bug: incorrect capability assignment, incorrect domain transition, or incorrect command labeling. Reproducible: Always Steps to Reproduce: 1. Install Fedora 44/45 with SELinux enforcing. 2. Enable tuned: systemctl enable --now tuned 3. Observe AVCs: ausearch -c chcon 4. Verify chcon is not executed: ausearch -c chcon -x chcon 5. Verify tuned does not call chcon: grep -R "chcon" /usr/lib/tuned /etc/tuned Actual Results: SELinux logs repeated AVCs: avc: denied { mac_admin } for pid=13031 comm="chcon" capability=33 scontext=system_u:system_r:tuned_t:s0 tcontext=system_u:system_r:tuned_t:s0 tclass=capability2 permissive=0 - tuned_t requests mac_admin - SELinux labels the operation as "chcon" - no chcon binary is executed - AVCs occur at every tuned startup Expected Results: - tuned_t should not request mac_admin - tuned_t should not be associated with "chcon" - SELinux should not mislabel internal operations as chcon - no AVCs should be generated during normal tuned operation Additional Information: ausearch -c chcon -x chcon → <no matches> grep -R "chcon" /usr/lib/tuned /etc/tuned → no output This confirms: - chcon is not executed - tuned does not call chcon - SELinux is mislabeling an internal capability request