Microsoft KB Archive/893376

= Stack corruption occurs if you remove and insert a smart card during a user log on process in Windows XP Service Pack 1 or Windows XP Service Pack 2 =

Article ID: 893376

Article Last Modified on 8/29/2007

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APPLIES TO

 Microsoft Windows XP Service Pack 2, when used with:  Microsoft Windows XP Professional  Microsoft Windows XP Service Pack 1, when used with:  Microsoft Windows XP Professional x64 Edition

 Microsoft Windows XP Professional </li></ul>

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<div class="symptoms_section">

SYMPTOMS
Consider the following scenario:
 * You use a smart card for user authentication on a computer that is running either Microsoft Windows XP Service Pack 1 (SP1) or Windows XP Service Pack 2 (SP2).
 * You insert the smart card in to the reader and type the PIN to initiate the log on process.
 * You remove the smart card before the log on process is completed.
 * You insert the smart card again.

In this scenario, a stack corruption occurs, and the computer stops responding (hangs). Additionally, you receive the following error message:

STOP: 0xc000021a {Fatal System Error}

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CAUSE
This problem occurs because of a race condition in the Winlogon process.

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Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
This hotfix requires Windows XP SP1 or Windows XP SP2.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Windows XP SP1, x86-based versions
<pre class="fixed_text">Date        Time   Version            Size    File name -- 28-May-2005 02:28  5.1.2600.1695     971,776  Msgina.dll 27-May-2005 23:55  5.1.2600.1695     594,432  Xpsp2res.dll 27-May-2005 23:56  5.1.2600.1695       7,168  Xpsp3res.dll

Windows XP SP2, x86-based versions
<pre class="fixed_text">Date        Time   Version            Size    File name -- 28-May-2005 02:37  5.1.2600.2687     996,864  Msgina.dll 27-May-2005 23:36  5.1.2600.2687      17,920  Xpsp3res.dll

Windows XP SP1, Itanium-based versions
<pre class="fixed_text">Date        Time   Version            Size    File name       Platform - 27-May-2005 13:55  5.1.2600.1695   1,274,880  Msgina.dll       IA-64 27-May-2005 11:51  5.1.2600.1695     593,920  Xpsp2res.dll     IA-64 27-May-2005 11:52  5.1.2600.1695       6,656  Xpsp3res.dll     IA-64 27-May-2005 13:59  5.1.2600.1695     971,776  Wmsgina.dll      x86 27-May-2005 11:25  5.1.2600.1695     594,432  Wxpsp2res.dll    x86 27-May-2005 11:26  5.1.2600.1695       7,168  Wxpsp3res.dll    x86

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

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MORE INFORMATION
For more information about the standard terminology that is used to describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbqfe kbhotfixserver kbwinxppresp3fix kbfix kbbug KB893376

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