SYMPTOMS
If you disconnect a serial port while the serial port driver is reading data from a universal asynchronous receiver-transmitter (UART)-based serial device, the standard Microsoft serial port driver can enter an infinite loop in its interrupt service routine on a Microsoft Windows 2000-based computer.
You may receive the following Stop error:
-
1: kd> .bugcheck
Bugcheck code 000000CA
Arguments 00000003 8b06c670 e25933c8 00000001
1: kd> k
ChildEBP RetAddr
f6853c2c 80424be6 nt!IopProcessNewDeviceNode+0x89
f6853c3c 804b7da4 nt!IopProcessNewChildren+0x22
f6853c60 804b7b8f nt!IopEnumerateDevice+0x20a
f6853c9c 804b798a nt!IopStartAndEnumerateDevice+0x1c3
f6853cbc 804be655 nt!IopProcessStartDevicesWorker+0x72
f6853ccc 804b796d nt!IopForAllChildDeviceNodes+0x1f
f6853cf0 804b78bb nt!IopProcessStartDevicesWorker+0x55
f6853d0c 804b7860 nt!IopProcessStartDevices+0x43
f6853d30 80424a8f nt!IopBusCheck+0x78
f6853d78 80416f53 nt!IopDeviceActionWorker+0x40f
f6853da8 80454fde nt!ExpWorkerThread+0xaf
f6853ddc 8046a302 nt!PspSystemThreadStartup+0x54
00000000 00000000 nt!KiThreadStartup+0x16
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
No prerequisites are required.
Restart requirement
You do not have to restart your computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the
Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
--------------------------------------------------------------
21-Sep-2003 00:36 5.0.2195.6824 14,160 Serenum.sys
21-Sep-2003 00:35 5.0.2195.6824 60,880 Serial.sys