Bug 236528 - TKIP errors when using WPA
TKIP errors when using WPA
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
5.0
All Linux
medium Severity medium
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Assigned To: John W. Linville
Martin Jenner
http://tinyurl.com/35n8mf
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Depends On:
Blocks:
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Reported: 2007-04-15 23:51 EDT by Tom Sightler
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2007-11-07 14:46:48 EST
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Patch against ieee80211-1.1.14 (8.72 KB, patch)
2007-04-15 23:51 EDT, Tom Sightler
no flags Details | Diff

  None (edit)
Description Tom Sightler 2007-04-15 23:51:19 EDT
Description of problem:
When attempting to use WPA with an Intel wireless card (ipw2200/ipw3945) on a 
Dell D820 laptop once the wireless connection is put under load the connection 
will eventually drop with errors similar to the following in the log:

TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
N/A: Michael MIC verification failed for MSDU from 00:04:0e:7e:7a:58 keyidx=0
wlan: MSDU decryption/MIC verification failed (SA=00:04:0e:7e:7a:58 keyidx=0)

This is a known issue with the 1.1.13 version of the ieee80211 module 
components, especially when running on SMP systems (very common with 
hyperthreading and dual-core desktops everywhere).  A patch has been available 
for months, and versions of the ieee80211 stack >= 1.2.15 do not have this 
issues.

Version-Release number of selected component (if applicable):
kernel-2.6.18-8.1.1.el5
ieee80211 versions 1.1.13

How reproducible:
Always

Steps to Reproduce:
1. Configure any wireless card which uses the ieee80211 stack
2. Connect to a WPA enabled AP (WEP can cause the problem as well)
3. Pass a lot of traffic (usually hundreds of megabytes)
4. Watch the logs for errors such as "TKIP: ICV error detected" or "N/A: Michael 
MIC verification failed for MSDU"
5. Connection will eventually drop and probably not recover easily.
  
Actual results:
Errors are logged and connection eventually drops

Expected results:
Wireless connection should be stable

Additional info:
I'll attache the patch that was posted on one of the ipw-devel lists for this 
issue but it would probably be better to actually upgrade to a newer version of 
the ieee80211 stack.
Comment 1 Tom Sightler 2007-04-15 23:51:19 EDT
Created attachment 152663 [details]
Patch against ieee80211-1.1.14
Comment 2 Ernie Petrides 2007-09-11 18:01:48 EDT
The changes above have been committed to the RHEL5.1 kernel, which is now in beta.

Don, I found the changes in the following patch tracking file:

  softmac-updates-from-2-6-21-1.patch.1
Comment 3 Tom Sightler 2007-09-11 18:38:27 EDT
I have been running the RHEL5.1 beta kernel for several weeks on this same 
laptop and the problem seems to be corrected.  Thanks for the attention to this 
issue.

Tom
Comment 6 errata-xmlrpc 2007-11-07 14:46:48 EST
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/RHBA-2007-0959.html

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