The SMB Redirector may hang when the SMB protocol is used in Windows 7 SP1 or Windows 8.1

Symptoms

When the Server Message Block (SMB) protocol is used in Windows 7 Service Pack 1 (SP1) or in Windows 8.1 to access files that reside on a remote system, the SMB Redirector may hang, and the system seems to stop responding.

Cause

This problem occurs because of a deadlock condition in the SMB Redirector that occurs when the queue is full.

Resolution

To resolve this problem, apply this update or hotfix to a client computer that is running Windows 7 SP1 or Windows 8.1.

Update information

The fix that resolves this problem is included in the November 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2.

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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, the client computer must meet one of the following prerequisites:

  • It must have Service Pack 1 for Windows 7 installed.

  • It must have update 2919355 for Windows 8.1 installed.


Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

The English (United States) 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 file information and notesImportant 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    1.
    22xxx

    Windows 7

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • 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" 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 7

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7601.22819

97,280

25-Sep-2014

00:34

x86

Mrxsmb.sys

6.1.7601.22819

124,416

25-Sep-2014

00:34

x86

For all supported x64-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.1.7601.22819

128,000

25-Sep-2014

00:47

x64

Mrxsmb.sys

6.1.7601.22819

158,720

25-Sep-2014

00:48

x64

Windows 8.1 file information and notesImportant Windows 8.1 and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" 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

    6.3.960 0.17 xxx

    Windows 8.1

    RTM

    GDR

  • 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 8.1" 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 8.1

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17385

156,160

27-Sep-2014

04:16

x86

For all supported x64-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17385

202,752

27-Sep-2014

04:59

x64

For all supported ARM-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Mrxsmb20.sys

6.3.9600.17385

149,504

27-Sep-2014

03:51

Not applicable

Additional file information for Windows 7

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

File name

Package_1_for_kb3002297~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

2,040

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_2_for_kb3002297~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

2,023

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_3_for_kb3002297~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

2,025

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_for_kb3002297_rtm~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

1,459

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_for_kb3002297_sp1~31bf3856ad364e35~x86~~6.1.1.0.mum

File version

Not applicable

File size

1,918

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

X86_fcb4fb47c9cf897619d27bcabda24832_31bf3856ad364e35_6.1.7601.22819_none_48bcfe591021819c.manifest

File version

Not applicable

File size

1,043

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.22819_none_8d70eac801212c6d.manifest

File version

Not applicable

File size

4,035

Date (UTC)

25-Sep-2014

Time (UTC)

02:16

File name

X86_microsoft-windows-smbminirdr_31bf3856ad364e35_6.1.7601.22819_none_82276261c878ba9a.manifest

File version

Not applicable

File size

4,757

Date (UTC)

25-Sep-2014

Time (UTC)

02:13

Additional files for all supported x64-based versions of Windows 7

File name

Amd64_7823544b38f083a589e580a9714aed04_31bf3856ad364e35_6.1.7601.22819_none_5443f1c0ce59343e.manifest

File version

Not applicable

File size

1,049

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.22819_none_e98f864bb97e9da3.manifest

File version

Not applicable

File size

4,039

Date (UTC)

25-Sep-2014

Time (UTC)

03:31

File name

Amd64_microsoft-windows-smbminirdr_31bf3856ad364e35_6.1.7601.22819_none_de45fde580d62bd0.manifest

File version

Not applicable

File size

4,761

Date (UTC)

25-Sep-2014

Time (UTC)

03:29

File name

Package_1_for_kb3002297~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

2,052

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_2_for_kb3002297~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

2,235

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_3_for_kb3002297~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

2,037

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_for_kb3002297_rtm~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

1,467

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

File name

Package_for_kb3002297_sp1~31bf3856ad364e35~amd64~~6.1.1.0.mum

File version

Not applicable

File size

2,130

Date (UTC)

25-Sep-2014

Time (UTC)

05:46

Additional file information for Windows 8.1

Additional files for all supported x86-based versions of Windows 8.1

File name

Package_1_for_kb3002297~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicable

File size

1,821

Date (UTC)

29-Sep-2014

Time (UTC)

20:42

File name

Package_2_for_kb3002297~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicable

File size

1,821

Date (UTC)

29-Sep-2014

Time (UTC)

20:42

File name

Package_for_kb3002297_rtm_gm~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicable

File size

1,681

Date (UTC)

29-Sep-2014

Time (UTC)

20:42

File name

Package_for_kb3002297_rtm~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicable

File size

1,461

Date (UTC)

29-Sep-2014

Time (UTC)

20:42

File name

X86_63742353ef0423b2084b314fd60b62ad_31bf3856ad364e35_6.3.9600.17385_none_de0965b8dbafc6ff.manifest

File version

Not applicable

File size

701

Date (UTC)

29-Sep-2014

Time (UTC)

20:42

File name

X86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17385_none_1f7ba3a4a55ea92c.manifest

File version

Not applicable

File size

4,096

Date (UTC)

27-Sep-2014

Time (UTC)

05:41

Additional files for all supported x64-based versions of Windows 8.1

File name

Amd64_0238cfcd64a2c7b059ec05852df6ef0c_31bf3856ad364e35_6.3.9600.17385_none_0ec7ac204afdcb39.manifest

File version

Not applicable

File size

705

Date (UTC)

29-Sep-2014

Time (UTC)

20:44

File name

Amd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17385_none_7b9a3f285dbc1a62.manifest

File version

Not applicable

File size

4,100

Date (UTC)

27-Sep-2014

Time (UTC)

07:28

File name

Package_1_for_kb3002297~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicable

File size

1,831

Date (UTC)

29-Sep-2014

Time (UTC)

20:44

File name

Package_2_for_kb3002297~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicable

File size

1,831

Date (UTC)

29-Sep-2014

Time (UTC)

20:44

File name

Package_for_kb3002297_rtm_gm~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicable

File size

1,691

Date (UTC)

29-Sep-2014

Time (UTC)

20:44

File name

Package_for_kb3002297_rtm~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicable

File size

1,469

Date (UTC)

29-Sep-2014

Time (UTC)

20:44

Additional files for all supported ARM-based versions of Windows 8.1

File name

Arm_77843002dd9dd01ae000e1454d44674b_31bf3856ad364e35_6.3.9600.17385_none_e5411ae80da0710c.manifest

File version

Not applicable

File size

701

Date (UTC)

29-Sep-2014

Time (UTC)

20:43

File name

Arm_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.3.9600.17385_none_1f7e15fca55bc7f2.manifest

File version

Not applicable

File size

4,096

Date (UTC)

27-Sep-2014

Time (UTC)

04:54

File name

Package_1_for_kb3002297~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicable

File size

1,821

Date (UTC)

29-Sep-2014

Time (UTC)

20:43

File name

Package_2_for_kb3002297~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicable

File size

1,821

Date (UTC)

29-Sep-2014

Time (UTC)

20:43

File name

Package_for_kb3002297_rtm_gm~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicable

File size

1,681

Date (UTC)

29-Sep-2014

Time (UTC)

20:43

File name

Package_for_kb3002297_rtm~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicable

File size

1,461

Date (UTC)

29-Sep-2014

Time (UTC)

20:43


Status

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

More Information

The SMB Redirector component implements the client part of the file-and-print sharing functionality exposed by Windows through Microsoft Networking. The implementation is based on the Server Message Block (SMB) protocol. The SMB protocol lets the client computer to access files on another computer that implements the SMB Service part of the file-and-print sharing functionality, and access to a shared printer.

References

Learn about the terminology that Microsoft uses to describe software updates.

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