Microsoft KB Archive/824602

= Computer Stops Responding or Quits Unexpectedly When a Server Application Receives Lots of Urgent TCP Data =

PSS ID Number: 824602

Article Last Modified on 9/26/2003

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The information in this article applies to:


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
If a custom-written server-side application or service receives data from a client application over TCP/IP, and the client mistakenly sends many data packets with the TCP urgent (or Out-of-Band [OOB]) bit set, the server may eventually run out of non-paged pool memory, and as a result, it may stop responding or quit unexpectedly.



CAUSE
This problem occurs because work buffers for the incoming urgent packets are not freed if the server-side application does not handle them correctly, and therefore the server eventually runs out of non-paged pool memory. If additional urgent data is received, the server may not be able to handle the data, and therefore it may stop responding or quit unexpectedly.



Hotfix Information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;%5BLN%5D;CNTACTMS

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart Requirement
You must 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 fix has the file attributes (or later) 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 tool in Control Panel. Date        Time     Version          Size     File name

18-Jul-2003 04:00    5.0.2195.6787    118,992  Afd.sys 18-Jul-2003 07:20    5.0.2195.6602    108,816  Msafd.dll 18-Jul-2003 04:33    5.0.2195.6787    314,928  Tcpip.sys 15-Jan-2003 04:56    5.0.2195.6655     16,240  Tdi.sys 18-Jul-2003 07:20    5.0.2195.6601     17,680  Wshtcpip.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New Naming Schema for Microsoft Windows Hotfix Packages

Keywords: kbBug kbfix kbQFE kbWin2000preSP5fix KB824602

Technology: kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Pro kbwin2000ProSearch kbwin2000Search kbwin2000Serv kbwin2000ServSearch kbWinAdvServSearch

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