UMDF User-mode drivers that use the Windows SideShow class extension return errors when you process commands asynchronously

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Article ID: 933607 - View products that this article applies to.
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SYMPTOMS

When a User-Mode Driver Framework (UMDF) driver that uses the Windows SideShow class extension processes a command asynchronously, the class extension may return a false error without fully processing the command. This problem may occur when the incoming input/output control (IOCTL) is not passed to the class extension component immediately. This problem may also occur when the IOCTL is from a sequential queue.

CAUSE

This problem occurs if the developer’s driver impersonates outside the scope of the original OnXxx callback. When this happens, the impersonation fails. This failure can cause the driver to return an incorrect error. To correctly handle incoming IOCTLs, the SideShow class extension component requires successful use of impersonation.

RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack

Hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart your 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 Vista, 32-bit versions

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Wudfcoinstaller.dll6.0.6000.2054687,55228-Feb-200703:08x86
Wudfhost.exe6.0.6000.20546144,38428-Feb-200702:14x86
Wudfpf.sys6.0.6000.2054652,22428-Feb-200702:14x86
Wudfplatform.dll6.0.6000.20546181,76028-Feb-200703:08x86
Wudfrd.sys6.0.6000.2054682,68828-Feb-200702:14Not Applicable
Wudfsvc.dll6.0.6000.2054655,29628-Feb-200703:08x86
Wudfx.dll6.0.6000.20546310,78428-Feb-200703:08x86
Wudfx.mofNot Applicable48,26207-Jan-200705:46Not Applicable
Wudfxuninstall.mofNot Applicable47507-Jan-200705:46Not Applicable

Windows Vista, 64-bit versions

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Wudfcoinstaller.dll6.0.6000.2054689,60028-Feb-200704:20x64
Wudfhost.exe6.0.6000.20546168,44828-Feb-200702:34x64
Wudfpf.sys6.0.6000.2054665,02428-Feb-200702:34x64
Wudfplatform.dll6.0.6000.20546202,75228-Feb-200704:20x64
Wudfrd.sys6.0.6000.20546108,03228-Feb-200702:34x64
Wudfsvc.dll6.0.6000.2054666,56028-Feb-200704:20x64
Wudfx.dll6.0.6000.20546382,97628-Feb-200704:20x64
Wudfx.mofNot Applicable48,26207-Jan-200705:46Not Applicable
Wudfxuninstall.mofNot Applicable47507-Jan-200705:46Not Applicable

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.

MORE INFORMATION

For more information, 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

Properties

Article ID: 933607 - Last Review: October 8, 2011 - Revision: 4.0
APPLIES TO
  • Windows Vista Ultimate
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Home Premium
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Enterprise 64-bit Edition
Keywords: 
kbautohotfix kbvistasp1fix kbwinvistapostrtmfix kbbug kbfix kbHotfixServer kbqfe KB933607

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