Bug 1421658

Summary:	systemd crashes when unit file is removed while service is executing ExecStartPre command
Product:	Red Hat Enterprise Linux 7	Reporter:	Michal Sekletar <msekleta>
Component:	systemd	Assignee:	systemd-maint
Status:	CLOSED ERRATA	QA Contact:	Radka Brychtova <rskvaril>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.3	CC:	bblaskov, rskvaril, systemd-maint-list
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	systemd-219-32.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-08-01 09:14:52 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:	1383699

Description Michal Sekletar 2017-02-13 11:38:57 UTC

Description of problem:
$subject

Version-Release number of selected component (if applicable):
systemd-219-30.el7_3.6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Have following unit file,

$ cat /etc/systemd/system/crasher.service
[Service]
ExecStartPre=/bin/sleep 10
ExecStart=/bin/true

2. Reload systemd
$ systemctl daemon-reload

3. Start the service, remove unit file and reload systemd
$ systemctl --no-block start crasher.service && rm -f /etc/systemd/system/crasher.service && systemctl daemon-reload

4. Wait for 10 seconds

Actual results:
Feb 13 06:30:16 qeos-82.lab.eng.rdu2.redhat.com systemd[1]: Caught <ABRT>, dumped core as pid 1377.
Feb 13 06:30:16 qeos-82.lab.eng.rdu2.redhat.com systemd[1]: Freezing execution.

Above messages in journal, systemd is not responding to requests.

Expected results:
systemd can handle situation gracefully

Additional info:
upstream fix, 

https://github.com/systemd/systemd/commit/47fffb3530af3e3ad4048570611685635fde062e

Comment 1 Lukáš Nykrýn 2017-02-13 13:47:43 UTC

https://github.com/lnykryn/systemd-rhel/pull/92

Comment 3 Lukáš Nykrýn 2017-02-20 10:57:08 UTC

fix merged to upstream staging branch ->
                https://github.com/lnykryn/systemd-rhel/commit/a66f97acac8b99a49aac58adf6d652cad7e4be38
                -> post

Comment 6 errata-xmlrpc 2017-08-01 09:14:52 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/RHBA-2017:2297