Bug 1741609
| Summary: | SELinux is preventing bacula-fd from using the 'dac_override' capabilities. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | jan.vesely |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 30 | CC: | andreas, dwalsh, grepl.miroslav, jpkorva, jridky, lvrabec, mgrepl, negativo17, phracek, plautrba, rvokal, vdolezal, vmojzis, zpytela |
| Target Milestone: | --- | Keywords: | Triaged |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:2f1ecfb848afaddddfa6bafb2ada18cd71628970a7895c94f331ce714a80ea0a;VARIANT_ID=workstation; | ||
| Fixed In Version: | selinux-policy-3.14.3-57.fc30 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-04-05 03:54:50 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: | |||
Hi Bacula devs, Does Bacula require to bypass DAC permissions also for writing on filesystem or search/read is enough? I assume for creating backup reasing the whole filesystem should be enough. Thanks, Lukas. *** Bug 1747133 has been marked as a duplicate of this bug. *** *** Bug 1771634 has been marked as a duplicate of this bug. *** Simone and bacula folks, bacula-fd requested the dac_override capability which is not allowed for the bacula_t domain. However, there already is dac_read_search granted: Is it sufficient for having bacula working? I will make some tests. I got "dac_override" error while restoring folder structure to /var/tmp/bacula-restores on CentOS 8.1. At a quick glance it seems that I can't restore subfolders owned by regular users (non-root). I've submitted a PR to address the issue: https://github.com/fedora-selinux/selinux-policy-contrib/pull/204 commit 7c4e8a4167103ac7bca5c46c1625906f6bdc4608 (HEAD -> rawhide, origin/rawhide, origin/HEAD)
Author: Zdenek Pytela <zpytela>
Date: Mon Feb 10 14:38:16 2020 +0100
Allow bacula dac_override capability
The dac_override capability is needed to restore permissions and ownership.
Resolves: rhbz#1741609
FEDORA-2020-cde9529d3d has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2020-cde9529d3d selinux-policy-3.14.3-57.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-cde9529d3d FEDORA-2020-cde9529d3d has been pushed to the Fedora 30 stable repository. If problem still persists, please make note of it in this bug report. |
Description of problem: SELinux is preventing bacula-fd from using the 'dac_override' capabilities. ***** Plugin dac_override (91.4 confidence) suggests ********************** If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system Then turn on full auditing to get path information about the offending file and generate the error again. Do Turn on full auditing # auditctl -w /etc/shadow -p w Try to recreate AVC. Then execute # ausearch -m avc -ts recent If you see PATH record check ownership/permissions on file, and fix it, otherwise report as a bugzilla. ***** Plugin catchall (9.59 confidence) suggests ************************** If you believe that bacula-fd should have the dac_override capability by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'bacula-fd' --raw | audit2allow -M my-baculafd # semodule -X 300 -i my-baculafd.pp Additional Information: Source Context system_u:system_r:bacula_t:s0 Target Context system_u:system_r:bacula_t:s0 Target Objects Unknown [ capability ] Source bacula-fd Source Path bacula-fd Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.14.3-43.fc30.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 5.2.7-200.fc30.x86_64 #1 SMP Thu Aug 8 05:35:29 UTC 2019 x86_64 x86_64 Alert Count 6 First Seen 2019-08-06 23:36:36 EDT Last Seen 2019-08-14 23:48:05 EDT Local ID 01eb4f68-ca4b-4140-9ed3-5fff9e51adde Raw Audit Messages type=AVC msg=audit(1565840885.804:2326): avc: denied { dac_override } for pid=1414 comm="bacula-fd" capability=1 scontext=system_u:system_r:bacula_t:s0 tcontext=system_u:system_r:bacula_t:s0 tclass=capability permissive=0 Hash: bacula-fd,bacula_t,bacula_t,capability,dac_override Version-Release number of selected component: selinux-policy-3.14.3-43.fc30.noarch Additional info: component: selinux-policy reporter: libreport-2.10.1 hashmarkername: setroubleshoot kernel: 5.2.7-200.fc30.x86_64 type: libreport