Bug 516589 - Kernel netlink neighbor updates not sent to multicast group (RTMGRP_NEIGH)
Summary: Kernel netlink neighbor updates not sent to multicast group (RTMGRP_NEIGH)
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.3
Hardware: All
OS: Linux
low
medium
Target Milestone: ---
: ---
Assignee: Danny Feng
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks: 526775 533192
TreeView+ depends on / blocked
 
Reported: 2009-08-10 15:51 UTC by David Ward
Modified: 2023-09-14 01:17 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-03-30 07:41:25 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
Backport kernel patches to fix netlink neigh notifications (3.07 KB, patch)
2009-08-10 15:51 UTC, David Ward
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0178 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 5.5 kernel security and bug fix update 2010-03-29 12:18:21 UTC

Description David Ward 2009-08-10 15:51:39 UTC
Created attachment 356911 [details]
Backport kernel patches to fix netlink neigh notifications

An application running in user space should be able to monitor updates to the kernel's neighbor table (also known as the ARP table for IPv4).  This is done by opening a netlink socket for the address family NETLINK_ROUTE and subscribing to the multicast group RTMGRP_NEIGH.

In kernel 2.6.18, however, the kernel does not send neighbor updates to this multicast group as it should when a neighbor entry is added or administratively removed.  This behavior is fixed in kernel 2.6.24 as the result of two upstream patches:

http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=commitdiff;h=b8673311804ca29680dd584bd08352001fcbe2f8

http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=commitdiff;h=d961db358f41033a8fc7b62948bc7cff1b4bb1fe


The patches above cannot be applied directly to the 2.6.18 kernel, but I created a working patch for the RHEL 5 kernel that provides the same relevant modifications, which is attached.

Comment 2 RHEL Program Management 2009-10-01 16:14:48 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 4 Don Zickus 2009-12-02 21:02:58 UTC
in kernel-2.6.18-176.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Please do NOT transition this bugzilla state to VERIFIED until our QE team
has sent specific instructions indicating when to do so.  However feel free
to provide a comment indicating that this fix has been verified.

Comment 5 Don Zickus 2009-12-02 21:14:21 UTC
in kernel-2.6.18-176.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Please do NOT transition this bugzilla state to VERIFIED until our QE team
has sent specific instructions indicating when to do so.  However feel free
to provide a comment indicating that this fix has been verified.

Comment 8 errata-xmlrpc 2010-03-30 07:41:25 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0178.html

Comment 9 Red Hat Bugzilla 2023-09-14 01:17:38 UTC
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days


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