The DRIVER_LEFT_LOCKED_PAGES_IN_PROCESS bug check has a value of 0x000000CB. This indicates that a driver or the I/O manager failed to release locked pages after an I/O operation.


This article is for programmers. If you're a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.


Parameter Description
1 The address of the internal lock tracking structure.
2 0 (Reserved)
3 Address of the MDL containing the locked pages.
4 Number of locked pages

For more information about memory descriptor list, see the following topics:

For more information on locking memory, see Locking Pageable Code or Data.

To research the cause of this bug check, use the !lockedpages debugger extension to display all of the locked MDLs for the current process.


This bug check is issued only if the registry value is equal to DWORD 1.

\\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\TrackLockedPages

If this value is not set, the system will issue the less-informative bug check 0x76 (PROCESS_HAS_LOCKED_PAGES).

This bug check can also be issued by Driver Verifier when the Pool Tracking option is enabled. For more information, see Pool Tracking.