Bug 2059166
| Summary: | SELinux is preventing rngd from using the 'setgid' capabilities. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Fabio Valentini <decathorpe> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 35 | CC: | dwalsh, grepl.miroslav, lvrabec, mmalik, omosnace, pkoncity, vdronov, vmojzis, zpytela |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:f98b1f95d3fcc4ba24814d5ddbc1c7bd7ec3bafda192d6ed6f56c19b27e60e2c;VARIANT_ID=workstation; | ||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-03-01 07:50:53 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: | |||
*** This bug has been marked as a duplicate of bug 2058914 *** thanks a lot for your report, Fabio! indeed, rngd was updated with a code that drops privileges so rngd process runs as non-root user. uid/gid/cap-changing syscalls are used for that. the selinux part indeed has issues with that. we'll handle the fix in bz2058914. for now i can think of the following workarounds: 1) a workaround with audit2allow/semodule described in bz2058914. 2) remove "-D daemon:daemon" from /etc/sysconfig/rngd. this will make rngd to run as root as before. 3) downgrade to the previous v6.14 rng-tools. the update was unpushed so fedora repos should have the previous v6.14 version. |
Description of problem: SELinux is preventing rngd from using the 'setgid' capabilities. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that rngd should have the setgid 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 'rngd' --raw | audit2allow -M my-rngd # semodule -X 300 -i my-rngd.pp Additional Information: Source Context system_u:system_r:rngd_t:s0 Target Context system_u:system_r:rngd_t:s0 Target Objects Unknown [ capability ] Source rngd Source Path rngd Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages SELinux Policy RPM selinux-policy-targeted-35.15-1.fc35.noarch Local Policy RPM selinux-policy-targeted-35.15-1.fc35.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 5.16.11-200.fc35.x86_64 #1 SMP PREEMPT Wed Feb 23 17:08:49 UTC 2022 x86_64 x86_64 Alert Count 10 First Seen 2022-02-28 12:19:34 CET Last Seen 2022-02-28 12:20:14 CET Local ID 517876c9-1106-49b8-96f8-cbd27c072506 Raw Audit Messages type=AVC msg=audit(1646047214.689:206): avc: denied { setgid } for pid=941 comm="rngd" capability=6 scontext=system_u:system_r:rngd_t:s0 tcontext=system_u:system_r:rngd_t:s0 tclass=capability permissive=0 Hash: rngd,rngd_t,rngd_t,capability,setgid Version-Release number of selected component: selinux-policy-targeted-35.15-1.fc35.noarch Additional info: component: selinux-policy reporter: libreport-2.15.2 hashmarkername: setroubleshoot kernel: 5.16.11-200.fc35.x86_64 type: libreport Potential duplicate: bug 2058914