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Bug 131048 (IT_47809)

Summary: Summary: Multicast broken on x86_64
Product: Red Hat Enterprise Linux 3 Reporter: Kevin W. Rudd <solgato>
Component: kernelAssignee: Mike Gahagan <mgahagan>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: ionut, jparadis, petrides, riel, tao
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
URL: http://seclists.org/lists/linux-kernel/2004/Feb/7006.html
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2004-12-20 20:56:03 UTC Type: ---
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:    
Bug Blocks: 123574    
Attachments:
Description Flags
x86_64 checksum fix. none

Description Kevin W. Rudd 2004-08-26 21:41:48 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113

Description of problem:
There are checksum problems in the x86_64 environment that are keeping
multicast support from working properly.  This has been documented and
fixed in newer kernels.  The original linux-kernel thread and patch
can be found via the following URL:

http://seclists.org/lists/linux-kernel/2004/Feb/7006.html

Version-Release number of selected component (if applicable):
kernel-2.4.21-18.ELsmp

How reproducible:
Always

Steps to Reproduce:
1. Run tcpdump or ethereal to capture igmp traffic
2. Join a multicast group.  For our test, we were joining 225.1.1.13.
3. Note the IGMP checksum
    
Actual Results:  The Membership Report packet sent had an incorrect
checksum:

Frame 12 (54 bytes on wire, 54 bytes captured)
Ethernet II, Src: 00:0d:60:53:04:47, Dst: 01:00:5e:00:00:16
Internet Protocol, Src Addr: 160.108.89.103 (160.108.89.103), Dst Addr:
224.0.0.22 (224.0.0.22)
Internet Group Management Protocol
    IGMP Version: 3
    Type: Membership Report (0x22)
    Header checksum: 0xf8fd (incorrect, should be 0xf7ef)
    Num Group Records: 1
    Group Record : 225.1.1.13  Change To Exclude Mode
        Record Type: Change To Exclude Mode (4)
        Aux Data Len: 0
        Num Src: 0
        Multicast Address: 225.1.1.13 (225.1.1.13)


Expected Results:  The checksum should be 0xf7ef for that particular
Membership Report.

Additional info:
Comment 2 Don Howard 2004-08-27 07:05:16 UTC 
Created attachment 103154 [details]
x86_64 checksum fix.
Comment 5 Ernie Petrides 2004-09-15 00:10:56 UTC 
A fix for this problem has just been committed to the RHEL3 U4
patch pool this evening (in kernel version 2.4.21-20.6.EL).
Comment 6 Mike Gahagan 2004-10-07 15:19:02 UTC 
*** Bug 123454 has been marked as a duplicate of this bug. ***
Comment 7 John Flanagan 2004-12-20 20:56:03 UTC 
An errata 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/RHBA-2004-550.html