Memory leak occurs in the Spoolsv.exe process after you run an application that performs WMI queries in Windows 7 or Windows Server 2008 R2

Symptoms

Consider the following scenario:

  • Network printers are installed on a print server that is running Windows Server 2008 or Windows Server 2008 R2.

  • You connect to the server from a client computer that is running Windows 7 or Windows Server 2008 R2.

  • You run an application on the client computer that collects print job information by performing Windows Management Instrumentation (WMI) queries.

  • The application uses the WMI ExecNotificationQuery method.

In this scenario, a memory leak may occur in the Spoolsv.exe process. This memory leak issue occurs on the client and server-side.

Note This issue does not occur when the computers are in a domain environment.

Cause

This issue occurs because Win32spl.dll impersonates the OpenPrinter function but does not impersonate the ClosePrinter function. However, a printer handle that is allocated in the OpenPrinter function is deleted in the ClosePrinter function. Therefore, the ClosePrinter function fails, and a handle leak occurs.

Resolution

To resolve this issue, apply hotfix 2796647 on the client computer.

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 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 one of the following operating systems:

  • Windows 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

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

Restart requirement

You must 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 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • 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

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. 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 7

File name

File version

File size

Date

Time

Platform

Win32spl.dll

6.1.7600.21414

492,544

02-Jan-2013

04:32

x86

Win32spl.dll

6.1.7601.22207

497,152

02-Jan-2013

04:37

x86

Win32spl.dll

6.1.7600.21414

492,544

02-Jan-2013

04:32

x86

Win32spl.dll

6.1.7601.22207

497,152

02-Jan-2013

04:37

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Win32spl.dll

6.1.7600.21414

751,104

02-Jan-2013

05:40

x64

Win32spl.dll

6.1.7601.22207

756,224

02-Jan-2013

05:31

x64

Win32spl.dll

6.1.7600.21414

751,104

02-Jan-2013

05:40

x64

Win32spl.dll

6.1.7601.22207

756,224

02-Jan-2013

05:31

x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Win32spl.dll

6.1.7600.21414

1,513,472

02-Jan-2013

04:47

IA-64

Win32spl.dll

6.1.7601.22207

1,527,808

02-Jan-2013

04:48

IA-64


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 for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

X86_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7600.21414_none_3a1dc609eb2375e0.manifest

File version

Not applicable

File size

10,424

Date (UTC)

02-Jan-2013

Time (UTC)

05:01

Platform

Not applicable

File name

X86_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7601.22207_none_3c11f3d9e83f11e0.manifest

File version

Not applicable

File size

10,424

Date (UTC)

02-Jan-2013

Time (UTC)

05:09

Platform

Not applicable

File name

X86_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_7.1.7600.21414_none_2b8e424f760a1eaf.manifest

File version

Not applicable

File size

6,369

Date (UTC)

02-Jan-2013

Time (UTC)

04:58

Platform

Not applicable

File name

X86_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_7.1.7601.22207_none_2d82701f7325baaf.manifest

File version

Not applicable

File size

6,369

Date (UTC)

02-Jan-2013

Time (UTC)

05:07

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7600.21414_none_963c618da380e716.manifest

File version

Not applicable

File size

10,428

Date (UTC)

02-Jan-2013

Time (UTC)

06:07

Platform

Not applicable

File name

Amd64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7601.22207_none_98308f5da09c8316.manifest

File version

Not applicable

File size

10,428

Date (UTC)

02-Jan-2013

Time (UTC)

06:03

Platform

Not applicable

File name

Amd64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_7.1.7600.21414_none_87acddd32e678fe5.manifest

File version

Not applicable

File size

6,373

Date (UTC)

02-Jan-2013

Time (UTC)

06:13

Platform

Not applicable

File name

Amd64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_7.1.7601.22207_none_89a10ba32b832be5.manifest

File version

Not applicable

File size

6,373

Date (UTC)

02-Jan-2013

Time (UTC)

06:09

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_1a3d36fc4bfba490a49594f6f26d2eb3_31bf3856ad364e35_6.1.7601.22207_none_7bd300d95970fa2a.manifest

File version

Not applicable

File size

1,084

Date (UTC)

02-Jan-2013

Time (UTC)

19:32

Platform

Not applicable

File name

Ia64_e5b1afb8ad425ba09140d689e2249ef6_31bf3856ad364e35_6.1.7600.21414_none_fedd4027f9d606e8.manifest

File version

Not applicable

File size

1,084

Date (UTC)

02-Jan-2013

Time (UTC)

19:32

Platform

Not applicable

File name

Ia64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7600.21414_none_3a1f69ffeb217edc.manifest

File version

Not applicable

File size

10,426

Date (UTC)

02-Jan-2013

Time (UTC)

06:04

Platform

Not applicable

File name

Ia64_microsoft-windows-p..ooler-networkclient_31bf3856ad364e35_6.1.7601.22207_none_3c1397cfe83d1adc.manifest

File version

Not applicable

File size

10,426

Date (UTC)

02-Jan-2013

Time (UTC)

05:57

Platform

Not applicable


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