A computer that is running Windows 7 or Windows Server 2008 R2 crashes when an application sends an I/O request to a USB-connected CD drive

Consider the following scenario:

• You have a computer that is running Windows�7 or Windows Server 2008 R2.�
• A CD drive is connected to the computer through a USB port.
• An application sends an IOCTL_SCSI_PASS_THROUGH_DIRECT I/O request to the CD drive.

In this scenario, the computer crashes. Additionally, you may receive a Stop error message on a blue screen. This Stop error message resembles the following: STOP 0x000000D1, (parameter1. parameter2, parameter3, parameter4)

This issue occurs because the system kernel-mode driver accesses the data buffer by unexpectedly using a user-mode address.

When a user-mode application issues the IOCTL_SCSI_PASS_THROUGH_DIRECT I/O request to a USB-connected CD drive, the Mode Sense (6) command is sent to the CD drive. Then, there is a conversion from the Mode Sense (6) command to the Mode Sense (10) command. When this I/O request is completed by the CD drive, a conversion from the Mode Sense (10) command to the Mode Sense (6) command occurs. During this conversion process, the system kernel-mode driver accesses the data buffer by using a user-mode address. Therefore, the computer crashes.

This problem is planned to be fixed in the next service pack.

For information on the same problem on Windows Vista or Windows Server 2008, see the following KB:
http://support.microsoft.com/kb/974711/en-us

For more information about the IOCTL_SCSI_PASS_THROUGH_DIRECT request, visit the following Microsoft Web site:
http://msdn.microsoft.com/en-us/library/ff560521.aspx�

For more information about the Mode Sense command, visit the following Microsoft Web site:
http://msdn.microsoft.com/en-us/library/dd424451.aspx

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.