Article ID: 180053
Article Last Modified on 9/22/2005
APPLIES TO
- Microsoft SNA Server 2.11 Service Pack 2
- Microsoft SNA Server 3.0 Service Pack 4
- Microsoft SNA Server 4.0
- Microsoft SNA Server 3.0 Service Pack 2
- Microsoft SNA Server 3.0 Service Pack 3
- Microsoft SNA Server 4.0
This article was previously published under Q180053
SYMPTOMS
The SNA Server service (Snaservr.exe) may fail unexpectedly with an access violation. When the problem occurs, all users connecting through SNA Server will lose their host sessions and the SNA Server service will no longer be running. The Windows NT application event log should indicate an Event 624, logged by SNA Server. Also, the following entry will be logged in the <Ntroot>\Drwtsn32.log file, indicating an access violation in function "s1pimcrc":
Application exception occurred:
App: snaservr.exe (<process ID>)
Exception number: c0000005 (access violation)
[...]
State Dump for Thread Id 0x8c
eax=00000000 ebx=002bff62 ecx=000056f1 edx=04000400 esi=00cc4480
edi=00000000
eip=00426412 esp=002bff28 ebp=00000000 iopl=0 nv up ei pl nz ac po nc
cs=001b ss=0023 ds=0023 es=0023 fs=0038 gs=0000 efl=00000216
function: s1pimcrc
004263f0 56 push esi
004263f1 33c0 xor eax,eax
004263f3 a0aa6f4800 mov al,[sncurrnt (00486faa)] ds:00486faa=4a
004263f8 8d0440 lea eax,[eax+eax*2] ds:00000000=????????
004263fb c1e002 shl eax,0x2
004263fe 0fbf888ef64800 movsx ecx,word ptr [eax+0x48f68e] ds:0048f68e=0000
00426405 8bb084f64800 mov esi,[eax+0x48f684] ds:0048f684=00000000
0042640b 8b048d7c3f4a00 ds:000056f1=????????
mov eax,[s1seccb+0x1335c (004a3f7c)+ecx*4]
FAULT ->00426412 80781701 cmp byte ptr [eax+0x17],0x1
ds:005de922=??
*----> Stack Back Trace <----*
FramePtr ReturnAd Param#1 Param#2 Param#3 Param#4 Function Name
00000000 00000000 00000000 00000000 00000000 00000000 snaservr!s1pimcrc
00000010 00000000 00000000 00000000 00000000 00000000 snaservr!<nosymbols>
CAUSE
In one instance, the SNA Server failed to check if an LU6.2 control block was valid when receiving a message from a client machine.
STATUS
Microsoft has confirmed this to be a problem in SNA Server versions 2.11 SP2, 3.0, 3.0 SP1, 3.0 SP2 and 4.0.
This problem was corrected in the latest SNA Server versions 3.0 and 4.0 U.S. Service Packs. For information on obtaining these Service Packs, query on the following word in the Microsoft Knowledge Base (without the spaces):
S E R V P A C K
Keywords: kbbug kbfix kbqfe kbhotfixserver KB180053
