Bug 1496564
| Summary: | SELinux is preventing lightdm from using the 'dac_override' capabilities. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Gene Snider <genes1122> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | rawhide | CC: | dwalsh, lsm5, lvrabec, mgrepl, plautrba, pmoore |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:b7090ab274333268594ae5a38a5e238464fc9f879690a016401fd928d42b0177; | ||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-02-20 11:24:23 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: | |||
Description of problem: SELinux is preventing lightdm from using the 'dac_override' capabilities. ***** Plugin dac_override (91.4 confidence) suggests ********************** If 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 if you believe that lightdm 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 'lightdm' --raw | audit2allow -M my-lightdm # semodule -X 300 -i my-lightdm.pp Additional Information: Source Context system_u:system_r:xdm_t:s0-s0:c0.c1023 Target Context system_u:system_r:xdm_t:s0-s0:c0.c1023 Target Objects Unknown [ capability ] Source lightdm Source Path lightdm Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.13.1-288.fc28.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name (removed) Platform Linux (removed) 4.14.0-0.rc2.git0.1.fc28.x86_64 #1 SMP Mon Sep 25 12:59:54 UTC 2017 x86_64 x86_64 Alert Count 1 First Seen 2017-09-27 12:01:24 PDT Last Seen 2017-09-27 12:01:24 PDT Local ID 8aab5604-a458-4952-a8a4-21544212d891 Raw Audit Messages type=AVC msg=audit(1506538884.60:188): avc: denied { dac_override } for pid=609 comm="lightdm" capability=1 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=capability permissive=1 Hash: lightdm,xdm_t,xdm_t,capability,dac_override Version-Release number of selected component: selinux-policy-3.13.1-288.fc28.noarch Additional info: component: selinux-policy reporter: libreport-2.9.2 hashmarkername: setroubleshoot kernel: 4.14.0-0.rc2.git0.1.fc28.x86_64 type: libreport