Access Violation in RRAS When Windows Time Service Adjusts System Time

• Microsoft Windows NT Server version 4.0

SYMPTOMS

On a system with Routing and Remote Access Service (RRAS), the following symptoms may occur as a result of a negative system time adjustment.

• Mpradmin.exe may display an Integer Overflow exception error message (status code 0xC0000095).



• You may not be able to stop Mprouter.exe and it stops accepting new RRAS connections.

CAUSE

Both symptoms are caused by an arithmetic calculation for call duration that can generate a negative 64-bit result that causes an integer overflow when saved in a 32-bit integer format. This behavior occurs only if the time adjustment is negative and sufficiently large enough to move the system clock back to a time prior to the beginning of any RRAS connection.

Time adjustments are caused in a variety of ways. Manual time correction through the System Time tool in Control Panel is a potential source, as are automatic mechanisms such as the intrinisic OS operations that periodically synchronize the system time to the CMOS clock resource. Domain-based Microsoft network time services can similarly cause this problem. Additionally, third-party programs that synchronize the system clock to a network-accessible reference clock can act to stimulate this problem.

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

http://www.microsoft.com/support/supportnet/overview/overview.asp

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was first corrected in Windows NT 4.0 Service Pack 6.

Additional query words: 4.00

Keywords : kbbug4.00 kbfix4.00
Version : winnt:4.0
Platform : winnt
Issue type : kbbug