Bug 151488 - sk98lin driver drops udp packets
sk98lin driver drops udp packets
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
i386 Linux
medium Severity high
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Assigned To: John W. Linville
Brian Brock
Depends On:
Blocks: 156320
  Show dependency treegraph
Reported: 2005-03-18 09:52 EST by Hosting 2000 Account
Modified: 2007-11-30 17:07 EST (History)
3 users (show)

See Also:
Fixed In Version: RHSA-2005-663
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-09-28 10:51:33 EDT
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Regression: ---
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Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
The fix (1.39 KB, patch)
2005-03-18 09:54 EST, Hosting 2000 Account
no flags Details | Diff

  None (edit)
Description Hosting 2000 Account 2005-03-18 09:52:06 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050223 Firefox/1.0.1

Description of problem:
sk98lin driver drops udp frames > 200 bytes without checksum.

To fix it apply the following patch in drivers/net/sk98lin, taken from the
official driver

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. send a large udp-packet without checksum to the machine and you will get no reply

Additional info:
Comment 1 Hosting 2000 Account 2005-03-18 09:54:01 EST
Created attachment 112126 [details]
The fix
Comment 2 John W. Linville 2005-03-21 15:43:01 EST
I have incorporated the patch in the test kernels available here:


Please give them a try and report the results.  Thanks!

P.S.  What purpose is served by sending a large udp-packet without a checksum? 
Just curious... :-)
Comment 3 Hosting 2000 Account 2005-03-22 04:03:52 EST
I could not find the sk98lin driver in the kernel package. Isn't it part of

Novell Border Manager for Windows obviously sends udp packets without checksum,
which our router with sk98lin drops. 
Comment 4 John W. Linville 2005-03-22 10:58:14 EST
Right you are...I have included the unsupported rpms as well...they are
available at the same link as in comment 2.

Please give them a try and report the results.  Thanks!
Comment 5 Hosting 2000 Account 2005-03-23 02:51:02 EST
It works great. Thank you.
Comment 7 Ernie Petrides 2005-04-20 23:18:39 EDT
A fix for this problem has just been committed to the RHEL3 U6
patch pool this evening (in kernel version 2.4.21-32.1.EL).
Comment 14 Red Hat Bugzilla 2005-09-28 10:51:33 EDT
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.


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