Bug Check 0x4E: PFN_LIST_CORRUPT

The PFN_LIST_CORRUPT bug check has a value of 0x0000004E. This indicates that the page frame number (PFN) list is corrupted.

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

PFN_LIST_CORRUPT Parameters

Parameter 1 indicates the type of violation. The meaning of the other parameters depends on the value of Parameter 1.

Parameter 1 Parameter 2 Parameter 3 Parameter 4 Cause of Error

0x01

The ListHead value that was corrupted

The number of pages available

0

The list head was corrupted.

0x02

The entry in the list that is being removed

The highest physical page number

The reference count of the entry being removed

A list entry was corrupted.

0x07

The page frame number

The current share count

0

A driver has unlocked a certain page more times than it locked it.

0x8D

The page frame number whose state is inconsistent

0

0

The page-free list is corrupted. This error code most likely indicates a hardware issue.

0x8F

New page number

Old page number

0

The free or zeroed page listhead is corrupted.

0x99

Page frame number

Current page state

0

A page table entry (PTE) or PFN is corrupted.

0x9A

Page frame number

Current page state

The reference count of the entry that is being removed

A driver attempted to free a page that is still locked for IO.

Cause

This error is typically caused by a driver passing a bad memory descriptor list. For example, the driver might have called MmUnlockPages twice with the same list.

If a kernel debugger is available, examine the stack trace.