Microsoft KB Archive/311946

= FIX: Multiple Remote Read Requests May Cause AV in Message Queuing Service =

Article ID: 311946

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Message Queuing 2.0

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This article was previously published under Q311946



SYMPTOMS
An access violation (AV) may occur in the Microsoft Message Queuing service when there are multiple remote computers reading from one or more of its queues.



CAUSE
Incorrect reference counting leads to an internal queue buffer pointer being prematurely released. This results in memory corruption and random access violations.



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

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. 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;EN-US;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 typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

Date        Time    Version          Size    File name     Platform --- 19-May-2001 15:15   5.0.0.735       71,120   Mqac.sys      x86 19-May-2001 15:23   5.0.0.721      214,288   Mqads.dll     x86 19-May-2001 15:23   5.0.0.720       41,744   Mqdssrv.dll   x86 19-May-2001 15:23   5.0.0.734      414,992   Mqqm.dll      x86 19-May-2001 15:23   5.0.0.733       91,920   Mqrt.dll      x86 15-Jan-2001 10:39   5.0.2195.3140    3,584   Spmsg.dll     x86



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

Additional query words: MSMQ

Keywords: kbprb kbqfe KB311946

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