Bug 1771291

Summary:	Potential issue with circular dependency in kdump-error-handler
Product:	Red Hat Enterprise Linux 8	Reporter:	Kairui Song <kasong>
Component:	kexec-tools	Assignee:	Kairui Song <kasong>
Status:	CLOSED ERRATA	QA Contact:	Emma Wu <xiawu>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.2	CC:	cye, ruyang
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	8.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	kexec-tools-2.0.20-21.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 01:40:25 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:	1771222, 1825061

Description Kairui Song 2019-11-12 06:35:50 UTC

Description of problem:
Currently kdump-error-handler have:
dracut-kdump-error-handler.service:ExecStopPost=-/usr/bin/systemctl --fail --no-block default

Systemd try to start default target again when it exits. This may lead to infinite loop if kdump-error-handler exits by accident.

> From:	"d.hatayama" <d.hatayama>
>
> I also checked the behavior when FAILURE_ACTION="exit" for in case, i.e.
> the situation where shutdown/halt/reboot doesn't work well for some reason
> even though it terminates with successful exit status.
> The result is infinite loop like:
>·
>    kdump-capture.serviec pulls in emergency.target on failrue
>    => emergency.target pulls in emergency.service
>    => emergency.service isolates kdump-error-handler.service
>    => kdump-error-handler.service isolates default.target (= initrd.target) on ExecStopPost=
>    => initrd.target pulls in kdump-capture.service
>·
> I think there is a room to improve this design in another work.

Comment 6 errata-xmlrpc 2020-11-04 01:40:25 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 (kexec-tools 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-2020:4462