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Q242472: Access Violation in Perfmon If Long Extensible Counter DLL Path

Article: Q242472
Product(s): Microsoft Windows NT
Version(s): winnt:4.0,4.0 SP4,4.0 SP5
Operating System(s): 
Keyword(s): kbWinNT400PreSP7Fixkbfixlist
Last Modified: 08-MAY-2002

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The information in this article applies to:

- Microsoft Windows NT Server versions 4.0, 4.0 SP4, 4.0 SP5 
- Microsoft Windows NT Server, Enterprise Edition versions 4.0, 4.0 SP4, 4.0 SP5 
- Microsoft Windows NT Workstation versions 4.0, 4.0 SP4, 4.0 SP5 
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SYMPTOMS
========

If the Performance Monitor extensible counter dynamic-link library (DLL) path in
the registry contains more than 62 characters, you receive an "Access violation"
error message in Performance Monitor (Perfmon.exe) when you click Add Counters
in any chart, log, or report.

CAUSE
=====

This problem can occur if the Performance Monitor extensible counter DLL path in
the registry, which is a long string of more than 62 characters, gets
concatenated in the small size buffer. This causes a buffer overflow.

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

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

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

  Date      Time                 Size    File name     Platform
  -------------------------------------------------------------
  09/24/99  05:59 PM             247,056 Advapi32.dll	Intel
  09/24/99  05:58 PM             404,240 Advapi32.dll	Alpha



STATUS
======

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

Additional query words:

======================================================================
Keywords          : kbWinNT400PreSP7Fix kbfixlist
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTW400sp5 kbWinNTW400sp4 kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400sp5 kbWinNTSEnt400sp4 kbWinNTSEnt400 kbWinNTS400sp5 kbWinNTS400sp4 kbWinNTS400search kbWinNTS400
Version           : winnt:4.0,4.0 SP4,4.0 SP5
Hardware          : ALPHA x86
Issue type        : kbprb
Solution Type     : kbfix

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