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Bug 2061680 - systemd creates mislabeled files on boot
Summary: systemd creates mislabeled files on boot
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: 9.0
Hardware: Unspecified
OS: Linux
medium
medium
Target Milestone: rc
: 9.1
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-03-08 10:09 UTC by Marko Myllynen
Modified: 2022-11-15 12:56 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-34.1.31-2.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-15 11:13:14 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github fedora-selinux selinux-policy pull 1171 0 None open Label /var/run/machine-id as machineid_t 2022-04-28 08:18:19 UTC
Red Hat Issue Tracker RHELPLAN-114786 0 None None None 2022-03-08 10:10:27 UTC
Red Hat Product Errata RHBA-2022:8283 0 None None None 2022-11-15 11:13:42 UTC

Description Marko Myllynen 2022-03-08 10:09:18 UTC 
Description of problem:
After a fresh RHEL 9.0 Beta installation and initial boot there are two mislabeled files created by systemd present:

# restorecon -Rv /
Relabeled /etc/systemd/network/71-net-ifnames-prefix-net0.link from system_u:object_r:systemd_hwdb_etc_t:s0 to system_u:object_r:etc_t:s0
Relabeled /run/machine-id from system_u:object_r:machineid_t:s0 to system_u:object_r:var_run_t:s0

It would be nice to have the labels changed where needed so that restorecon wouldn't change anything. Thanks.

Version-Release number of selected component (if applicable):
RHEL 9.0 Beta
Comment 1 David Tardon 2022-03-08 12:23:17 UTC 
(In reply to Marko Myllynen from comment #0)
> Description of problem:
> After a fresh RHEL 9.0 Beta installation and initial boot there are two
> mislabeled files created by systemd present:
> 
> # restorecon -Rv /
> Relabeled /etc/systemd/network/71-net-ifnames-prefix-net0.link from
> system_u:object_r:systemd_hwdb_etc_t:s0 to system_u:object_r:etc_t:s0

This one is actually created by prefixdevname, not by systemd; I created bug 2061725 for it.

> Relabeled /run/machine-id from system_u:object_r:machineid_t:s0 to
> system_u:object_r:var_run_t:s0

I'm not sure we can do anything about this one. AFAICS, /run/machine-id is only created if /etc/machine-id failed to be created for any reason, and it is then bind-mounted to /etc/machine-id. That means that /etc/machine-id and /run/machine-id share the same selinux label and a change made on one of them will just make the other one wrong...
Comment 2 Yu Watanabe 2022-03-08 12:27:58 UTC 
> /etc/systemd/network/71-net-ifnames-prefix-net0.link

Yeah, as already David commented, the file is not generated by systemd.
Comment 3 David Tardon 2022-03-16 18:42:25 UTC 
(In reply to David Tardon from comment #1)
> AFAICS, /run/machine-id is
> only created if /etc/machine-id failed to be created for any reason, and it
> is then bind-mounted to /etc/machine-id.

... which means that /run/machine-id has to have the same default label as /etc/machine id -> passing over to selinux-policy.
Comment 5 Zdenek Pytela 2022-04-28 11:11:43 UTC 
To backport:
commit e5475f58e40de965ecd4dcf8820a72f10b46e002 (HEAD -> rawhide, upstream/rawhide)
Author: Zdenek Pytela <zpytela>
Date:   Thu Apr 28 10:14:51 2022 +0200

    Label /var/run/machine-id as machineid_t
Comment 14 errata-xmlrpc 2022-11-15 11:13:14 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 (selinux-policy bug fix and enhancement update), 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-2022:8283
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