DOCUMENT:Q166162  13-MAY-1999  [exchange]
TITLE   :XFOR: MACGATE Access Violation During Generation of Admin Msg
PRODUCT :Microsoft Exchange
PROD/VER:4.0 5.0
OPER/SYS:
KEYWORDS:kbtshoot kbusage

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0 
-------------------------------------------------------------------------------


SYMPTOMS
========

When processing a bad message, the Macintosh Gateway causes an access violation
in Macgate.exe.

CAUSE
=====

An improper argument is being passed to a heap deallocation routine.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange versions 4.0
and 5.0.

This problem has been corrected in the latest U.S. Service Pack for Microsoft
Exchange Server version 4.0. 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

This problem was corrected in the latest Microsoft Exchange Server 5.0 U.S.
Service Pack. 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


MORE INFORMATION
================

The Drwtsn32.log may look similar to:

   State Dump for Thread Id 0x177

   Application exception occurred:
      App: macgate.DBG (pid=177)
      When: 3/27/1997 @ 10:58:16.609
      Exception number: c0000005 (access violation)

   eax=ffffffff ebx=00000000 ecx=77f3be08 edx=00140548 esi=00140000
   edi=00d2f690
   eip=77f64d9a esp=00d2f63c ebp=00d2f654 iopl=0         nv up ei pl zr na
   po nc
   cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000
   efl=00000246

   function: RtlFreeHeap
        77f64d75 85db             test    ebx,ebx
        77f64d77 0f85a1000000     jne     RtlFreeHeap+0x1ec (77f64e1e)
        77f64d7d ffb6b8040000     push    dword ptr [esi+0x4b8]
   ds:001404b8=00140548
        77f64d83 e8e8270000       call    RtlLeaveCriticalSection
   (77f67570)
        77f64d88 e991000000       jmp     RtlFreeHeap+0x1ec (77f64e1e)
        77f64d8d 83ef18           sub     edi,0x18
        77f64d90 85db             test    ebx,ebx
        77f64d92 897df8           mov     [ebp-0x8],edi
   ss:01c3e05a=????????
        77f64d95 8b0f             mov     ecx,[edi]
   ds:00d2f690=77f3be08
        77f64d97 8b4704           mov     eax,[edi+0x4]
   ds:01c3e096=????????
   FAULT ->77f64d9a 8908             mov     [eax],ecx
   ds:ffffffff=????????
        77f64d9c 894104           mov     [ecx+0x4],eax
   ds:78e4a80e=????????
        77f64d9f 750b             jnz     RtlFreeHeap+0x17a (77f64dac)
        77f64da1 ffb6b8040000     push    dword ptr [esi+0x4b8]
   ds:001404b8=00140548
        77f64da7 e8c4270000       call    RtlLeaveCriticalSection
   (77f67570)
        77f64dac 6800800000       push    0x8000
        77f64db1 8d45fc           lea     eax,[ebp-0x4]
   ss:01c3e05a=????????
        77f64db4 50               push    eax
        77f64db5 8d4df8           lea     ecx,[ebp-0x8]
   ss:01c3e05a=????????
        77f64db8 c745fc00000000   mov    dword ptr [ebp-0x4],0x0
   ss:01c3e05a=????????
        77f64dbf 51               push    ecx
        77f64dc0 6aff             push    0xff

   *----> Stack Back Trace <----*

   FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
   00d2f654 77f02a81 00140000 00000000 00d2f6b0 77f13130 ntdll!RtlFreeHeap
   00d2f698 00406715 00d2f6b0 77e77ea7 00000001 00143900 kernel32!LocalFree
   00d2f710 00403181 80020bc2 80020bbe 00d2f748 00000000
   macgate!GenerateAdminMsg
   00d2f988 00403c70 00d2f9f0 00000000 00000001 0000ea60 macgate!LogBadFile
   00d2fe70 00402852 00d2ffec 00000000 00000000 00000000
   macgate!ProcessMactoPCMessages


======================================================================
Keywords          : kbtshoot kbusage 
Technology        : kbExchangeSearch kbExchange500 kbExchange400 kbZNotKeyword2
Version           : 4.0 5.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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