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Bug Check 0xC1: SPECIAL_POOL_DETECTED_MEMORY_CORRUPTION

The SPECIAL_POOL_DETECTED_MEMORY_CORRUPTION bug check has a value of 0x000000C1. This indicates that the driver wrote to an invalid section of the special pool.

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.

SPECIAL_POOL_DETECTED_MEMORY_CORRUPTION Parameters

Parameter 4 indicates the type of violation.

Parameter 1 Parameter 2 Parameter 3 Parameter 4 Cause of Error

Address that the driver tried to free

Reserved

0

0x20

A driver attempted to free pool which was not allocated.

Address that the driver tried to free

Bytes requested

Bytes calculated (actually given to the caller)

0x21,

0x22

A driver attempted to free a bad address.

Address that the driver tried to free

Address where bits are corrupted

Reserved

0x23

A driver freed an address, but nearby bytes within the same page have been corrupted.

Address that the driver tried to free

Address where bits are corrupted

Reserved

0x24

A driver freed an address, but bytes occurring after the end of the allocation have been overwritten.

Current IRQL

Pool type

Number of bytes

0x30

A driver attempted to allocate pool at an incorrect IRQL.

Current IRQL

Pool type

Address that the driver tried to free

0x31

A driver attempted to free pool at an incorrect IRQL.

Address that the driver tried to free

Address where one bit is corrupted

Reserved

0x32

A driver freed an address, but nearby bytes within the same page have a single bit error.

The _POOL_TYPE codes are enumerated in ntddk.h. In particular, zero indicates nonpaged pool and one indicates paged pool.

Cause

A driver has written to an invalid section of the special pool.

Resolution

Obtain a backtrace of the current thread. This backtrace will usually reveal the source of the error.

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