Bug 1346464
| Summary: | Tuned in RHEL-7.3 should use polkit | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jaroslav Škarvada <jskarvad> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.3 | CC: | lvrabec, mgrepl, mmalik, plautrba, pvrabec, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-81.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-11-04 02:32:01 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1289048 | ||
I could hardcode the CheckAuthorization method signature into Tuned, so theoretically it could work without introspecting polkit, but using the dbus-python defaults (i.e without the hardcoded signature) is preferred. Also maybe that the non-working introspection is not the main problem, maybe that that the policy doesn't allow Tuned to query polkit via DBus (but I didn't check it). Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2283.html |
Description of problem: Tuned is moving to use polkit, which is required by e.g. Cockpit. Tuned queries org.freedesktop.PolicyKit1.Authority, it uses python-dbus which introspects the interface at first. Unfortunately this results in DBus timeouts: ERROR:dbus.proxies:Introspect error on org.freedesktop.PolicyKit1:/o g/freedesktop/PolicyKit1/Authority: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possib e causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout exp ired, or the network connection was broken. It seems there is the following AVC: type=USER_AVC msg=audit(1465939447.235:314): pid=727 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0: c0.c1023 msg='avc: denied { send_msg } for msgtype=method_return dest=:1.148 spid=770 tpid=8396 scontext=system_u:system_r:policykit_ t:s0 tcontext=system_u:system_r:tuned_t:s0 tclass=dbus exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' It seems to work OK with 'setenforce 0'. Version-Release number of selected component (if applicable): selinux-policy-3.13.1-60.el7.noarch How reproducible: Always Steps to Reproduce: 1. Run Tuned from upstream GIT head 2. tuned-adm active Actual results: DBus timeout when introspecting polkit Expected results: No DBus timeout Additional info: The same Tuned functionality will be introduced in Fedora