Bug 2123169

Summary:	fapolicyd ineffective with systemd DynamicUser=yes
Product:	[Fedora] Fedora	Reporter:	François Rigault <frigo>
Component:	fapolicyd	Assignee:	Steve Grubb <sgrubb>
Status:	CLOSED EOL	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	38	CC:	rsroka, sgrubb
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Hardware:	All
OS:	Linux
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Clone Of:
Clones:	2136802 (view as bug list)		Environment:
Last Closed:	2024-05-21 14:16:07 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:
Bug Blocks:	2136802

Description François Rigault 2022-08-31 20:35:36 UTC

Description of problem:
fapolicyd rules are not applied in systemd services running with dynamic user

Version-Release number of selected component (if applicable):
fapolicyd-1.1.4-4.fc38.x86_64
fapolicyd-selinux-1.1.4-4.fc38.noarch

How reproducible:
I only tried on Rawhide

Steps to Reproduce:
1. cp /usr/bin/id /usr/bin/id2
2. systemd-run --pipe -p User=haproxy    bash -c 'id ; id2'
3. systemd-run --pipe -p DynamicUser=yes bash -c 'id ; id2'

Actual results:
in 3.: 
# systemd-run --pipe -p DynamicUser=yes bash -c 'id ; id2'
Running as unit: run-u86.service
uid=62294(run-u86) gid=62294(run-u86) groups=62294(run-u86) context=system_u:system_r:initrc_t:s0
uid=62294(run-u86) gid=62294(run-u86) groups=62294(run-u86) context=system_u:system_r:initrc_t:s0

Expected results:
similar to 2., id2 should fail:

Running as unit: run-u81.service
uid=982(haproxy) gid=981(haproxy) groups=981(haproxy) context=system_u:system_r:initrc_t:s0
/usr/bin/bash: line 1: /usr/bin/id2: Operation not permitted


Additional info:

Comment 1 Steve Grubb 2022-08-31 21:04:36 UTC

For some reason, fanotify doesn't see the open/execute request at all. It sees systemd-run start and after that it goes dark.

Comment 4 Steve Grubb 2022-10-21 13:32:04 UTC

Thanks for pointing out this problem. Upstream has merged a patch that allows fapolicyd to see events on bind mount or overlayfs partitions. However, there are limitations on what can be controlled when containers are used. In any event, try the 1.1.7 version when it becomes available.

Comment 5 Ben Cotton 2023-02-07 15:13:29 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 38 development cycle.
Changing version to 38.

Comment 6 Aoife Moloney 2024-05-07 15:48:18 UTC

This message is a reminder that Fedora Linux 38 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 38 on 2024-05-21.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '38'.

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prior to this bug being closed.

Comment 7 Aoife Moloney 2024-05-21 14:16:07 UTC

Fedora Linux 38 entered end-of-life (EOL) status on 2024-05-21.

Fedora Linux 38 is no longer maintained, which means that it
will not receive any further security or bug fix updates. As a result we
are closing this bug.

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