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1993-11-23
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DOCUMENT:Q104184 22-NOV-1993 [W_NT]
TITLE :Windows NT Terminal and Telnet May Cause an Access Violation
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:buglist3.10 fixlist3.10.001
----------------------------------------------------------------------
The information in this article applies to:
- Microsoft Windows NT operating system version 3.1
- Microsoft Windows NT Advanced Server version 3.1
----------------------------------------------------------------------
SYMPTOMS
========
After Telnet is started, if Terminal is closed before the TELNET>
prompt is displayed, you may receive an access violation error
message.
CAUSE
=====
There is a timing window in the Telnet service that can cause the
master thread to delete the client's critical section before the
client thread terminates. This occurs if Terminal closes just before
the master tries to write the TELNET> prompt. The master's write then
fails, causing it to quit and delete the critical section. The
client's read then fails, causing it to try to access the critical
section during its termination processing. The client thread then
access violates and the access violation error message is generated.
STATUS
======
Microsoft has confirmed this to be a problem in Windows NT and Windows NT
Advanced Server version 3.1. This problem was corrected in the latest U.S.
Service Pack for Windows NT and Windows NT Advanced Server version 3.1. For
information on obtaining the Service Pack, query on the following word in
the Microsoft Knowledge Base (without the spaces):
S E R V P A C K
Additional reference words: 3.10
KBCategory:
KBSubcategory: tpip
=============================================================================
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.
Copyright Microsoft Corporation 1993.