microsoft stop code irql not less or equal kbdclass.sys

#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS DRIVERS#
#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS DRIVER#
#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS WINDOWS#

In the debugger, run the !irql command to display information about the IRQL of a processor on the target computer before the debugger break. To start debugging this type of bug check, examine the stack trace by using the k, kb, kc, kd, kp, kP, kv (display stack backtrace) commands. trap command to set your context to the provided address. If a trap frame is available in the dump file, use the. You can use dx (display debugger object model expression), a debugger command, to display this: dx KiBugCheckDriver.

#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS DRIVER#

If a driver that is responsible for the error can be identified, its name is printed on the blue screen and stored in memory at the location (PUNICODE_STRING) KiBugCheckDriver. If kernel debugger is available get stack backtrace.Īrg1: fffff808add27150, memory referencedĪrg3: 0000000000000000, value 0 = read operation, 1 = write operationĪrg4: fffff808adc386a6, address which referenced memory

#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS DRIVERS#

This is usuallyĬaused by drivers using improper addresses. Interrupt request level (IRQL) that is too high. DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)Īn attempt was made to access a pageable (or completely invalid) address at an The following example is output from !analyze. The !analyze debugger extension displays information about the bug check and can be helpful in determining the root cause.

Does not call any other inline functions that could be paged out.

If the problem is caused by the driver that you are developing, make sure that the function that was executing at the time of the bug check is:

#MICROSOFT STOP CODE IRQL NOT LESS OR EQUAL KBDCLASS.SYS WINDOWS#

The function was called by using a function pointer that was an invalid pointer.įor more information on Windows IRQLs, see Windows Internals 7th Edition Part 1 by Pavel Yosifovich, Mark E. The function call was made to a function in another driver, and that driver was unloaded. The function was marked as pageable and was running at an elevated IRQL (which includes obtaining a lock). Possible causes for the page fault include the following events: This bug check is usually caused by drivers that have used improper memory addresses. This can be caused by:ĭereferencing a bad pointer (such as a NULL or freed pointer) while executing at or above DISPATCH_LEVEL.Īccessing pageable data at or above DISPATCH_LEVEL.Įxecuting pageable code at or above DISPATCH_LEVEL. Typically, when this error occurs, a driver has tried to access an address that is pageable (or that is completely invalid) while the interrupt request level (IRQL) was too high. To determine the cause requires the Windows debugger, programming experience and access to the source code for the faulting module.

Use ln (list nearest symbols) on this address to see the name of the function. DRIVER_IRQL_NOT_LESS_OR_EQUAL parameters ParameterĪddress that referenced memory. If you are a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.

Microsoft stop code irql not less or equal kbdclass.sys