Bug 1880434

Summary:	Replace GNUTLS_SHUT_RDWR by GNUTLS_SHUT_WR when ending TLS connections
Product:	Red Hat Enterprise Linux 8	Reporter:	Renaud Métrich <rmetrich>
Component:	rsyslog	Assignee:	Attila Lakatos <alakatos>
Status:	CLOSED ERRATA	QA Contact:	Dalibor Pospíšil <dapospis>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	8.2	CC:	alakatos, dapospis, rsroka, sbroz, zfridric
Target Milestone:	rc	Keywords:	AutoVerified, EasyFix, Patch, Triaged
Target Release:	8.0
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rsyslog-8.2102.0-3.el8	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 18:04:45 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:	1932795
Bug Blocks:

Description Renaud Métrich 2020-09-18 14:13:56 UTC

Description of problem:

Some TLS servers don't replay to graceful shutdown requests "for optimization".
This results in rsyslog's omfwd+gtls client to wait forever for a reply of the TLS server which never comes, due to shutting down the connection with gnutls_bye(GNUTLS_SHUT_RDWR).

Commands such as "systemctl restart rsyslog" just hang for 1m30 and rsyslogd gets killed upon timeout by systemd.

The hang can be reproduced at will when sending the logs to a Kiwi Syslog server, which apparently doesn't send the TLS reply upon connection termination request.

This is a request to backport PR https://github.com/rsyslog/rsyslog/pull/4424.


Version-Release number of selected component (if applicable):

rsyslog-8


How reproducible:

Always with a Kiwi backend but I don't have this to test myself.


Steps to Reproduce:
1. Stop rsyslog

Actual results:

systemd kills rsyslogd after 1min30

Expected results:

no killing

Comment 1 Renaud Métrich 2020-09-28 15:59:38 UTC

Please also add PR https://github.com/rsyslog/librelp/pull/220 (for omrelp)

Comment 15 errata-xmlrpc 2021-11-09 18:04:45 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 (rsyslog and its related dependencies 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-2021:4193