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Bug 1630309

Summary: Failed to parse protect system value, ignoring: strict
Product: Red Hat Enterprise Linux 7 Reporter: Jiri Koten <jkoten>
Component: fprintdAssignee: Bastien Nocera <bnocera>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: medium Docs Contact:
Priority: low    
Version: 7.6CC: fsumsal, ovasik, systemd-maint-list, tpelka
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: fprintd-0.8.1-2.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-10-30 11:10:55 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:

Description Jiri Koten 2018-09-18 11:21:34 UTC 
Description of problem:
When the Fingerprint Authentication Daemon is started, there is an error and couple of warnings in the service logs.

$ systemctl status fprintd -l                                                         _1 
● fprintd.service - Fingerprint Authentication Daemon
   Loaded: loaded (/usr/lib/systemd/system/fprintd.service; static; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:fprintd(1)

systemd[1]: [/usr/lib/systemd/system/fprintd.service:23] Unknown lvalue 'MemoryDenyWriteExecute' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:26] Unknown lvalue 'ProtectKernelModules' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:29] Unknown lvalue 'RestrictRealtime' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:11] Failed to parse protect system value, ignoring: strict
systemd[1]: [/usr/lib/systemd/system/fprintd.service:12] Unknown lvalue 'ProtectKernelTunables' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:13] Unknown lvalue 'ProtectControlGroups' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:14] Unknown lvalue 'ReadWritePaths' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:23] Unknown lvalue 'MemoryDenyWriteExecute' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:26] Unknown lvalue 'ProtectKernelModules' in section 'Service'
systemd[1]: [/usr/lib/systemd/system/fprintd.service:29] Unknown lvalue 'RestrictRealtime' in section 'Service'


Despite that, the service seems to work normally. There is an incompatibility between unit file and systemd version.

Version-Release number of selected component (if applicable):
fprintd-0.8.1-1.el7
systemd-219-61.el7

How reproducible:
100%
Comment 2 Bastien Nocera 2018-09-18 15:04:35 UTC 
That's expected, systemd will throw warnings when it doesn't know an option. A newer systemd would actually use those configuration options.

I don't have a good answer for this, I think that it's a problem that systemd needs to deal with, because we want those configuration options to be there for newer systemds, but we don't want the older ones to warn about those.

Maybe we should have a "known option in newer systemd" patch in RHEL to quiet those warnings?
Comment 3 Frantisek Sumsal 2018-09-18 15:17:07 UTC 
We've dealt with such issues few times already and the solution is to include a .service file without such directives for RHEL 7, as it is highly unlikely that those directives will be supported during the life of RHEL 7 (e.g. MemoryDenyWriteExecute was introduced in systemd 231).

It doesn't make sense to suppress those warnings as it can hide potential typos or misconfiguration.
Comment 4 Bastien Nocera 2018-09-21 10:33:14 UTC 
(In reply to Jiri Koten from comment #0)
> systemd[1]: [/usr/lib/systemd/system/fprintd.service:11] Failed to parse
> protect system value, ignoring: strict

The systemd docs don't mention when support for this value was added to ProtectSystem (seems to have been systemd 232). Would have been nice to have.
Comment 9 errata-xmlrpc 2018-10-30 11:10:55 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, 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/RHEA-2018:3206