Bug 2004885

Summary: SELinux is preventing /usr/libexec/at-spi-bus-launcher from connect access on the tcp_socket port None
Product: Red Hat Enterprise Linux 9 Reporter: Michal Odehnal <modehnal>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: medium    
Version: 9.0CC: lvrabec, mmalik, rstrode, ssekidde
Target Milestone: rcKeywords: Triaged
Target Release: 9.0Flags: pm-rhel: mirror+
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-34.1.16-1.el9 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-05-17 15:49:48 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:
Attachments:
Description Flags
avc denials none

Description Michal Odehnal 2021-09-16 11:21:40 UTC 
Created attachment 1823552 [details]
avc denials

Description of problem:
While starting the Xephyr window I get flooded with denials.

Version-Release number of selected component (if applicable):
Compose used RHEL-9.0.0-20210907.4
Scratch build from https://bugzilla.redhat.com/show_bug.cgi?id=1993855#c20

How reproducible:
100%

Steps to Reproduce:
1. $ Xephyr :99 -query localhost -fullscreen

(My only action is starting the Xephyr with the above command, I do not do anything else)

Actual results:
Journal flooded with denials.

Expected results:
No denials

Additional info:
This is only happening with Xephyr and with the new gdm version which fixes the previous issue with login, does NOT seem to be a blocker for now, I can still login and logout, but could be investigated.
Comment 2 Ray Strode [halfline] 2021-09-17 12:47:57 UTC 
i don't think this is related to the change really. The AVC says it's blocking at-spi from talking over a tcp socket.  With XDMCP, the X connection is a tcp socket.  Just seems like a bug in selinux policy we don't hit typically because X connections are usually over a local socket.
Comment 3 Zdenek Pytela 2021-09-23 14:03:39 UTC 
I've submitted a Fedora PR to address the issue:
https://github.com/fedora-selinux/selinux-policy/pull/896
Comment 4 Zdenek Pytela 2021-09-23 16:39:30 UTC 
Commit to backport:

Author: Zdenek Pytela <zpytela>
Date:   Thu Sep 23 16:00:21 2021 +0200

    Allow gnome at-spi processes create and use stream sockets
Comment 12 errata-xmlrpc 2022-05-17 15:49:48 UTC 
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 (new packages: selinux-policy), 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://access.redhat.com/errata/RHBA-2022:3918