Bug 1697886
| Summary: | Denials of rngd running execmem while loading shared libraries during startup in F30 | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Matt Fagnani <matt.fagnani> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 30 | CC: | dwalsh, lvrabec, plautrba, zpytela |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.14.3-55.fc30 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-01-31 01:12:18 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
commit 3b51277ea03d4df62f01f8082c8e5d0ee34a9379 (HEAD -> rawhide, origin/rawhide, origin/HEAD)
Author: Nikola Knazekova <nknazeko>
Date: Fri Jan 10 13:49:52 2020 +0100
Boolean: rngd_t to use executable memory
New boolean for rngd_t,daemon that feeds random data from hardware device to kernel, to execute memory.
Fixed bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1697886
selinux-policy-3.14.3-55.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-384545235e This package has changed maintainer in the Fedora. Reassigning to the new maintainer of this component. selinux-policy-3.14.3-55.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: I've seen denials of rngd running execmem several times when booting in F30. The denials started right after I ran dnf system-upgrade from F29. The audit messages are of the form. type=AVC msg=audit(1554728843.716:120): avc: denied { execmem } for pid=879 comm="rngd" scontext=system_u:system_r:rngd_t:s0 tcontext=system_u:system_r:rngd_t:s0 tclass=process permissive=0 The journal showed that rngd had an error loading shared libraries and stopped unexpectedly due to the denials. audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=rngd comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' audit[879]: AVC avc: denied { execmem } for pid=879 comm="rngd" scontext=system_u:system_r:rngd_t:s0 tcontext=system_u:system_r:rngd_t:s0 tclass=process permissive=0 rngd[879]: /sbin/rngd: error while loading shared libraries: cannot make segment writable for relocation: Permission denied audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=rngd comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed' systemd[1]: rngd.service: Main process exited, code=exited, status=127/n/a systemd[1]: rngd.service: Failed with result 'exit-code'. rngd doesn't appear to restart itself. I'm running the targeted policy 3.14.3-27 in enforcing mode. Version-Release number of selected component (if applicable): rng-tools-0:6.7-1.fc30.i686 selinux-policy-0:3.14.3-27.fc30.noarch How reproducible: The denials happened 7 times which is most if not all of the times I've booted in F30. Steps to Reproduce: 1. Boot in F30 with the rngd service enabled 2. sudo ausearch -m AVC,USER_AVC,SELINUX_ERR -ts today 3. journalctl --since today -g rngd 4. systemctl status rngd Actual results: rngd was denied the action execmem while loading shared libraries and exited several times during startup in F30. Expected results: No denials occur and rngd starts normally. Additional info: