Symptoms

Consider the following scenario:

  • You develop a mini-filter driver and then enable Driver Verifier for the driver.

  • The mini-filter successfully calls the FltCreateFileEx2¬†routine and then performs a reparse operation on a computer that is running Windows 8.1, Windows Server 2012 R2, Windows 8, or Windows Server 2012.

  • The mini-filter calls the¬†FltReleaseFileNameInformation function to release the file name information from the FLT_CREATEFILE_TARGET_ECP_CONTEXT structure.

In this scenario, Filter Manager Verifier unexpectedly flags a violation. Additionally, you receive the following warning from Filter Manager Verifier:

"FILTER VERIFIER ERROR: A filter tried to release/free an object that it did not own..(Filter = 8B93BA28 (KLIF)), ObjectType = FLT_FILE_NAME_INFORMATION, Object = A4E62ED4).Type "!fltkd.filter 8B93BA28 8 1" in the debugger for more information about the. filter and objects referenced/allocated by the filter.."

Resolution

To resolve this issue in Windows 8.1 or Windows Server 2012 R2, install update 2955164. For more information about update 2955164, click the following article number to view the article in the Microsoft Knowledge Base:

2955164 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: May 2014
To resolve this issue in Windows 8 or Windows Server 2012, install the hotfix that is described in this article. This hotfix is also available at Microsoft Update Catalog.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. 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 website:

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

To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You might have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.


The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8, and Windows Server 2012 file information notesImportant Windows 8 and Windows Server 2012 hotfixes are included in the same packages.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.20 xxx

    Windows 8, and Windows Server 2012

    RTM

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows RT, Windows 8, and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Fltmgr.sys

6.2.9200.20813

293,208

2-Sep-13

4:44

x86


For all supported x64-based versions of Windows 8 and of Windows Server 2012

File name

File version

File size

Date

Time

Platform

Fltmgr.sys

6.2.9200.20813

374,616

2-Sep-13

7:05

x64




Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" 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 file information

Additional files for all supported x86-based versions of Windows 8

File property

Value

File name

X86_0b8371794046132f42518381e7014357_31bf3856ad364e35_6.2.9200.20813_none_c7897728c226c6a3.manifest

File version

Not applicable

File size

706

Date (UTC)

2-Sep-13

Time (UTC)

12:06

Platform

Not applicable

File name

X86_microsoft-windows-filtermanager-core_31bf3856ad364e35_6.2.9200.20813_none_0e88d26015188dbe.manifest

File version

Not applicable

File size

10,716

Date (UTC)

2-Sep-13

Time (UTC)

4:52

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012

File property

Value

File name

Amd64_3160179ce23e1e0af33a0f7adb52df74_31bf3856ad364e35_6.2.9200.20813_none_d8a1c81dcdf174c1.manifest

File version

Not applicable

File size

710

Date (UTC)

2-Sep-13

Time (UTC)

12:07

Platform

Not applicable

File name

Amd64_microsoft-windows-filtermanager-core_31bf3856ad364e35_6.2.9200.20813_none_6aa76de3cd75fef4.manifest

File version

Not applicable

File size

10,720

Date (UTC)

2-Sep-13

Time (UTC)

7:10

Platform

Not applicable


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