Bug Check 0xC5: DRIVER_CORRUPTED_EXPOOL

The DRIVER_CORRUPTED_EXPOOL bug check has a value of 0x000000C5. This indicates that the system attempted to access invalid memory at a process IRQL that was too high.

Important

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.

DRIVER_CORRUPTED_EXPOOL Parameters

Parameter	Description
1	Memory referenced
2	IRQL at time of reference
3	0: Read 1: Write
4	Address that referenced memory

Cause

The kernel attempted to access pageable memory (or perhaps completely invalid memory) when the IRQL was too high. The ultimate cause of this problem is almost certainly a driver that has corrupted the system pool.

In most cases, this bug check results if a driver corrupts a small allocation (less than PAGE_SIZE). Larger allocations result in bug check 0xD0 (DRIVER_CORRUPTED_MMPOOL).

Resolution

The !analyze debug extension displays information about the bug check and can be helpful in determining the root cause. If you have recently installed any new software, check to see if it is properly installed. Check for updated drivers on the manufacturer's website.

To debug this error, use the special pool option of Driver Verifier. If this fails to reveal the driver that caused the error, use the Global Flags utility to enable the special pool by pool tag.

For information about the special pool, consult the Driver Verifier section of the Windows Driver Kit.