The information in this article applies to:
SYMPTOMSWhen a user without the proper security privileges gains access to an Input/Output Control (IOCTL) with high security priveleges either by opening the device with trailing characters, using a relative open, or by obtaining the transport handle from the Windows Sockets Support driver (Afd.sys), the computer may stop responding (hang) and you may receive a STOP error message on a blue screen similar to the message listed below:
CAUSEThis behavior occurs because any access to an IOCTL needs to be available for users without the proper security privileges. STATUSMicrosoft has confirmed this to be a problem in Windows NT 4.0. MORE INFORMATIONAn IOCTL is a custom class of Input/Output Request Packets (IRP) available to User mode. Each Windows Driver Model (WDM) class driver has a set of IOCTLs that it uses to communicate with programs. The IOCTLs give the class driver information about intended usage by programs. The class driver performs all IOCTL parameter validation. Additional query words: TCP/IP
Keywords : ntstop ntsecurity ntsp kbbug4.00 kbfix4.00 |
Last Reviewed: October 28, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |