Microsoft KB Archive/942088

= Error message when you perform a file operation on a Windows Server 2003-based computer that has IPv6 installed: &quot;Stop 0x000000C9&quot; =

Article ID: 942088

Article Last Modified on 11/19/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems

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SYMPTOMS
Consider the following scenario:
 * Internet Protocol version 6 (IPv6) is installed on a Windows Server 2003-based computer.
 * The TCP Chimney Offload feature is enabled on the computer.
 * You perform a file operation on the computer. For example, you copy a file.

In this scenario, the system restarts unexpectedly after you receive the following Stop error message:

Stop 0x000000C9

DRIVER_VERIFIER_IOMANAGER_VIOLATION

Notes
 * The parameters in this error message vary, depending on the configuration of the computer.
 * Not all &quot;Stop 0x000000C9&quot; errors are caused by this problem.



CAUSE
This problem occurs because of a race condition in the Smb.sys driver. In this race condition, an I/O request packet (IRP) is completed two times. A second thread tries to complete the IRP that has already been freed. Therefore, a memory access error occurs.



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 Windows Server 2003 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
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 or Windows Server 2003 Service Pack 2 installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

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 item in Control Panel.

Windows Server 2003 with Service Pack 2, x64-based versions


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



MORE INFORMATION
For more information about software update terminology, 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

Additional query words: blue screen bug check 0xc9

Keywords: kbexpertiseinter kbwinserv2003postsp2fix kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB942088

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