Bug 146067

Summary: [PATCH] Channel bonding driver configured in 802.3 ad mode causes kernel panic when shutdwon
Product: Red Hat Enterprise Linux 4 Reporter: Amit Bhutani <amit_bhutani>
Component: kernelAssignee: John W. Linville <linville>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 4.0CC: davej, jbaron, riel, shillman, thomas_chenault, wwlinuxengineering
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2005-04-14 01:13:12 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 147461    
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Description Flags
Intel's patch none

Description Amit Bhutani 2005-01-25 03:23:55 UTC 
Description of problem:
The Ethernet Channnel Bonding driver (bonding v.2.6.0) present in 
kernel 2.6.9-5.EL has a bug in that it causes a kernel panic every 
time the bonded interface is brought down. This happens only when the 
bond is setup in mode 4 (IEEE 802.3ad mode a.k.a "dynamic link 
aggregation" mode).

Solution:
This bug was reported and fixed by Intel in bonding v.2.6.1. 
http://sourceforge.net/mailarchive/forum.php?
thread_id=5881381&forum_id=2094

Version-Release number of selected component (if applicable):
bonding v.2.6.0

How reproducible:
Easy

Steps to Reproduce:
1. Setup a bond (say bond0) with two slaves in mode 4
2. ifdown bond0
  
Actual results:
kernel panic with OOPS

Expected results:
No OOPS

Additional info:
Comment 1 Amit Bhutani 2005-01-25 03:25:43 UTC 
Created attachment 110179 [details]
Intel's patch
Comment 2 Amit Bhutani 2005-01-27 02:04:30 UTC 
FYI. This patch has made it upstream in the stable 2.6.10 kernel tree.
From 2.6.10 Changelog:
<akpm>
	[PATCH] Fix for 802.3ad shutdown issue
	
	The patch below fixes a problem with shutting down 802.3ad 
bonds on the 2.6
	kernel.  Taking the interface down or removing the module 
causes a stack
	dump if spinlock debugging is enabled.  This patch was 
generated from the
	2.6.9 kernel.
	
	This patch has been peer reviewed by our Linux software 
engineering team,
	and the fix has been verified by our test labs.
	
	Signed-off-by: Mitch Williams <mitch.a.williams>
	Signed-off-by: Andrew Morton <akpm>
	Signed-off-by: Jeff Garzik <jgarzik>
Comment 4 Amit Bhutani 2005-04-14 01:13:12 UTC 
Ritesh has regressed and confirms that this issue is fixed in U1 beta.
Comment 5 Tim Powers 2005-06-08 15:13:35 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 the 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-2005-420.html