Symptoms
Windows Server 2012 R2 Hyper-V hosts may crash in the csvfs.sys file process when you perform backup with certain backup applications.
Cause
This issue occurs if a backup solution sends the CsvControlQueryFileRevision request on a cleaned-up file object. In that situation, CSVFS may crash because one of its internal functions assumes that a valid file object will be passed.
How to get this update
Method 1: Windows Update
This update is available through Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.
Method 2: Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.
Prerequisites
To install this update, you must have the April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.
Registry information
To apply this update, you don't have to make any changes to the registry.
Restart requirement
You may have to restart the computer after you apply this update.
Update replacement information
This update doesn't replace a previously released update.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
File Information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.
Note The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes aren't listed, are signed with a Microsoft digital signature.
x64 Windows Server 2012 R2
|
File name |
File version |
File size |
Date |
Time |
Platform |
|---|---|---|---|---|---|
|
Csvfs.sys |
6.3.9600.18578 |
676,352 |
18-Jan-2017 |
14:54 |
x64 |
x64 Windows Server 2012 R2
|
File property |
Value |
|---|---|
|
File name |
Amd64_afe3b1cfba0cb41998497a4b6e6a0b97_31bf3856ad364e35_6.3.9600.18579_none_8e3b77eee7abe6ca.manifest |
|
File version |
Not applicable |
|
File size |
718 |
|
Date (UTC) |
20-Jan-2017 |
|
Time (UTC) |
00:04 |
|
Platform |
Not applicable |
|
File name |
Amd64_microsoft-windows-f..rcluster-csvfs-core_31bf3856ad364e35_6.3.9600.18579_none_c704dde433585f08.manifest |
|
File version |
Not applicable |
|
File size |
3,087 |
|
Date (UTC) |
19-Jan-2017 |
|
Time (UTC) |
17:20 |
|
Platform |
Not applicable |
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
