From 85850fc32bad16e00007f9f7ed417db0b907aed5 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Tue, 16 Aug 2011 20:48:18 +0000
Subject: [PATCH] [ACPI] - Fix massive memory corruption during FDO device
 relations handling

svn path=/trunk/; revision=53272
---
 reactos/drivers/bus/acpi/pnp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/reactos/drivers/bus/acpi/pnp.c b/reactos/drivers/bus/acpi/pnp.c
index 7151320dbd0..c59f30fbdb8 100644
--- a/reactos/drivers/bus/acpi/pnp.c
+++ b/reactos/drivers/bus/acpi/pnp.c
@@ -193,7 +193,7 @@ Bus_FDO_PnP (
         //
 
         length = sizeof(DEVICE_RELATIONS) +
-                ((numPdosPresent + prevcount) * sizeof (PDEVICE_OBJECT)) -1;
+                (((numPdosPresent + prevcount) - 1) * sizeof (DEVICE_OBJECT));
 
         relations = (PDEVICE_RELATIONS) ExAllocatePoolWithTag (PagedPool,
                                         length, 'IPCA');
@@ -214,7 +214,7 @@ Bus_FDO_PnP (
         //
         if (prevcount) {
             RtlCopyMemory (relations->Objects, oldRelations->Objects,
-                                      prevcount * sizeof (PDEVICE_OBJECT));
+                                      prevcount * sizeof (DEVICE_OBJECT));
         }
 
         relations->Count = prevcount + numPdosPresent;