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Q214460: DSMN - Access Violation in Swsvc.exe When Comparing Two Strings

Article: Q214460
Product(s): Microsoft Windows NT
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kbWinNT400sp5fix
Last Modified: 16-MAY-2002

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The information in this article applies to:

- Microsoft Windows NT Server version 4.0 
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SYMPTOMS
========

Directory Services for NetWare (DSMN) fails intermittently, generating the
following Dr. Watson error:

  The application swsvc.exe has generated an application error.

The following message is also written to the System Event Log:

  Event ID: 4097: The application, exe\swsvc.dbg, generated an application
  error. The exception is c0000005 at address 77a056e1 (wcsicmp).

CAUSE
=====

The DSMN service will fail periodically when attempting to rename an account
(user, or local or a global group). For example, it fails when the
pszOldAcctName is set to a null value and Windows NT attempts to dereference
this Null pointer in the _wcsicmp() routine. There are several conditions in the
SwpRenameAccount() routine where the pszOldAcctName string can be set to a Null
value; however, Windows NT never tests this string before making a call to
_wcsicmp() routine.


RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or
the individual software update. For information on obtaining the latest service
pack, please go to:

- http://www.microsoft.com/Windows/ServicePacks/

-or-

- Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

For information on obtaining the individual software update, contact Microsoft
Product Support Services. 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


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This
problem was first corrected in Windows NT version 4.0 Service Pack 5.

Additional query words: 4.00 swchglog.c

======================================================================
Keywords          : kbWinNT400sp5fix 
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : winnt:4.0
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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