[hbelusca] 74491: [NTOS]: Fix a potential memory leak. - If one of the ZwSetValueKey function fails, 'Node->ServiceName.Buffer' is leaked. - Also use 'L' prefix for wide characters. Patch by Lesan ...

Author: hbelusca
Date: Sun May  7 17:50:18 2017
New Revision: 74491

URL: http://svn.reactos.org/svn/reactos?rev=74491&view=rev
Log:
[NTOS]: Fix a potential memory leak.
- If one of the ZwSetValueKey function fails, 'Node->ServiceName.Buffer' is leaked. 
- Also use 'L' prefix for wide characters.
Patch by Lesan Ilie, thanks!
- Use "P(C)WSTR" instead of win32 "LP(C)WSTR" string pointer types (by me).
CORE-13207 #resolve

Modified:
    trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c

Modified: trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c...
==============================================================================
--- trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c	[iso-8859-1] Sun May  7 17:50:18 2017
@@ -1144,6 +1144,7 @@

if (!NT_SUCCESS(Status))
       {
+          ExFreePool(Node->ServiceName.Buffer);
           ExFreePoolWithTag(Node, TAG_IO_DEVNODE);
           return Status;
       }
@@ -1437,7 +1438,7 @@
     HANDLE hParent = NULL, hKey;
     OBJECT_ATTRIBUTES ObjectAttributes;
     UNICODE_STRING KeyName;
-    LPCWSTR Current, Last;
+    PCWSTR Current, Last;
     USHORT Length;
     NTSTATUS Status;

@@ -1462,7 +1463,7 @@
     /* Go up to the end of the string */
     while (Current <= Last)
     {
-        if (Current != Last && *Current != '\')
+        if (Current != Last && *Current != L'\')
         {
             /* Not the end of the string and not a separator */
             Current++;
@@ -1510,7 +1511,7 @@
         /* Start with this new parent key */
         hParent = hKey;
         Current++;
-        KeyName.Buffer = (LPWSTR)Current;
+        KeyName.Buffer = (PWSTR)Current;
     }

return STATUS_UNSUCCESSFUL;
@@ -4258,7 +4259,7 @@
    static WCHAR EnumKeyName[] = L"Enum\";
    static WCHAR DeviceParametersKeyName[] = L"Device Parameters";
    ULONG KeyNameLength;
-   LPWSTR KeyNameBuffer;
+   PWSTR KeyNameBuffer;
    UNICODE_STRING KeyName;
    ULONG DriverKeyLength;
    OBJECT_ATTRIBUTES ObjectAttributes;