Bug 2169512 - Better handle netlink error 'too many netlink events'
Summary: Better handle netlink error 'too many netlink events'
Keywords:
Status: VERIFIED
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: NetworkManager
Version: 9.2
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Thomas Haller
QA Contact: David Jaša
URL:
Whiteboard:
Depends On: 2154350
Blocks: 2183217
TreeView+ depends on / blocked
 
Reported: 2023-02-13 20:02 UTC by Thomas Haller
Modified: 2023-07-26 08:48 UTC (History)
14 users (show)

Fixed In Version: NetworkManager-1.43.5-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of: 2154350
Environment:
Last Closed:
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker NMT-360 0 None None None 2023-03-06 07:51:05 UTC
Red Hat Issue Tracker RHELPLAN-148523 0 None None None 2023-02-13 20:02:54 UTC
freedesktop.org Gitlab NetworkManager NetworkManager-ci merge_requests 1432 0 None opened test if NM doesn't lose netlink messages related to its own L3 requests 2023-05-30 09:41:47 UTC
freedesktop.org Gitlab NetworkManager NetworkManager merge_requests 1537 0 None opened Retry when platform went out of sync while sending a command 2023-03-14 15:02:52 UTC

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.
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