DOCUMENT:Q156655

TITLE   :Memory Leak and STOP Screens Using Intermediate NDIS Drivers

PRODUCT :Microsoft Windows NT

PROD/VER:4.00

OPER/SYS:WINDOWS

KEYWORDS:kbbug4.00 kbfile kbfix4.00 kbnetwork ntnetserv NTSrvWkst



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The information in this article applies to:



 - Microsoft Windows NT Server version 4.0

 - Microsoft Windows NT Workstation version 4.0

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SYMPTOMS

========



When intermediate (layered) NDIS miniport drivers are in use on Windows NT

4.0, you may experience one or both of the following:



 - A memory leak in kernel non-paged pool memory. Over time, memory may be

   depleted to the point where system stability is compromised.



 - You may receive the following blue-screen STOP error message with

   parameters that indicate the bad instruction is in the Ndis.sys driver:



      STOP: 0x0000000A (0x00000014, 0x00000002, 0x00000000, 0xFCBA1062).

      IRQL_NOT_LESS_OR_EQUAL (* Address fcba1062 has base at fcb95000 -

      NDIS.SYS)



CAUSE

=====



Intermediate drivers are typically add-ons that layer themselves over

hardware drivers as a filter to provide additional functionality, such as

data encryption or other value added services. The Ndis.sys driver included

in Windows NT 4.0 has been found to have some deficiencies when such

intermediate drivers are used.



RESOLUTION

==========



You can work around this problem by removing any unnecessary filter

drivers.



To resolve this problem, obtain the hotfix below, or wait for the next

service pack.



NOTE: Service Pack 3 must be applied to Windows NT 4.0 prior to applying

this fix.



This hotfix has been posted to the following Internet location:



   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/

   hotfixes-postSP3/ndis-fix



STATUS

======



Microsoft has confirmed this to be a problem in Windows NT version 4.0.

A supported fix is now available, but has not been fully regression-tested

and should be applied only to systems experiencing this specific problem.

Unless you are severely impacted by this specific problem, Microsoft

recommends that you wait for the next Service Pack that contains this fix.

Contact Microsoft Technical Support for more information.



Additional query words: 4.00 bug trap



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