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Bug 2120357 - 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]
Summary: dnsmasq high CPU usage in 4.11 spoke deployment or after 4.10.21 to 4.11.0-rc...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: dnsmasq
Version: 8.6
Hardware: Unspecified
OS: Unspecified
urgent
high
Target Milestone: rc
: ---
Assignee: Petr Menšík
QA Contact: Petr Sklenar
URL:
Whiteboard:
Depends On: 1919894 2106361 2120711
Blocks: 2122192
TreeView+ depends on / blocked
 
Reported: 2022-08-22 16:52 UTC by Petr Menšík
Modified: 2022-11-08 11:05 UTC (History)
18 users (show)

Fixed In Version: dnsmasq-2.79-24.el8
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 2106361
: 2122192 (view as bug list)
Environment:
Last Closed: 2022-11-08 10:01:07 UTC
Type: Bug
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
candidate patch (2.50 KB, patch)
2022-08-22 20:22 UTC, Petr Menšík
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-131865 0 None None None 2022-08-22 17:05:32 UTC
Red Hat Product Errata RHSA-2022:7633 0 None None None 2022-11-08 10:01:17 UTC

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


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