Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 2120357

Summary: dnsmasq high CPU usage in 4.11 spoke deployment or after 4.10.21 to 4.11.0-rc.1 upgrade on an SNO node [rhel8]
Product: Red Hat Enterprise Linux 8 Reporter: Petr Menšík <pemensik>
Component: dnsmasqAssignee: Petr Menšík <pemensik>
Status: CLOSED ERRATA QA Contact: Petr Sklenar <psklenar>
Severity: high Docs Contact:
Priority: urgent    
Version: 8.6CC: bfournie, bzvonar, ccrum, dcadzow, fkrska, itsoiref, keyoung, kpfleming, lmohanty, mcornea, mmasters, pemensik, psklenar, trwest, vgrinber, wking, yfirst, yliu1
Target Milestone: rcKeywords: Regression, Reopened, Triaged, Upgrades, ZStream
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: dnsmasq-2.79-24.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 2106361
: 2122192 (view as bug list) Environment:
Last Closed: 2022-11-08 10:01:07 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: 1919894, 2106361, 2120711    
Bug Blocks: 2122192    
Attachments:
Description Flags
candidate patch none

Comment 1 Petr Menšík 2022-08-22 20:22:48 UTC
Created attachment 1907017 [details]
candidate patch

Candidate fix ensuring server_domains_cleanup() is called before every cleanup_servers() unconditionally. It is required in any case server might be removed.

Comment 6 Petr Menšík 2022-08-23 16:36:15 UTC
This is a regression caused by bug #1919894 change, which in some cases produces dangling pointer. That is not easily detected, but can cause endless loop. Previous change were incomplete for few cases of changing used servers, including just /etc/resolv.conf server changes.

Comment 19 errata-xmlrpc 2022-11-08 10:01:07 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 (Moderate: dnsmasq security and bug fix 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/RHSA-2022:7633