Bug 2169512

Summary:	Better handle netlink error 'too many netlink events'
Product:	Red Hat Enterprise Linux 9	Reporter:	Thomas Haller <thaller>
Component:	NetworkManager	Assignee:	Thomas Haller <thaller>
Status:	VERIFIED ---	QA Contact:	David Jaša <djasa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	9.2	CC:	arawal, bgalvani, desktop-qa-list, ferferna, fpokryvk, lrintel, rkhan, sfaye, sferguso, sukulkar, surkumar, thaller, till, vbenes
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	NetworkManager-1.43.5-1.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:	2154350	Environment:
Last Closed:		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:	2154350
Bug Blocks:	2183217

Description Thomas Haller 2023-02-13 20:02:28 UTC

+++ This bug was initially created as a clone of Bug #2154350 +++

when the netlink receive buffer overflows, we need to resync and loose messages.

Thereby, we might also loose a reply to a request that we made, which causes the operation to fail.

In bug 2154350 and upstream [1], this was fixed for link requests.

[1] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/38d3834e2c464bd4820392800a3a1fe3f286fc62

But for ther netlink requests (e.g. adding an ip address), this is still now working correctly. See https://bugzilla.redhat.com/show_bug.cgi?id=2154350#c5


This bug exists to fix the related issues.

Comment 4 Thomas Haller 2023-03-30 06:28:33 UTC

fixed by https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1537

Comment 11 David Jaša 2023-05-30 06:33:38 UTC

VERIFIED in NetworkManager-1.43.8-1.el9: even in "too many netlink events" condition, NM doesn't lose track of IP configuration of interfaces.