[hpoussin] 31467: Use UNICODE_STRING and Rtl functions instead of LPWSTR variables (can prevent some buffer overflows) Remove assumption that UNICODE_STRING buffers are always NULL terminated Remove some intermediate buffers Do not define multiple times PnP parent key
27 Dec
2007
27 Dec
'07
7:02 p.m.
Author: hpoussin
Date: Thu Dec 27 22:02:32 2007
New Revision: 31467
URL: http://svn.reactos.org/svn/reactos?rev=31467&view=rev
Log:
Use UNICODE_STRING and Rtl functions instead of LPWSTR variables (can prevent some buffer
overflows)
Remove assumption that UNICODE_STRING buffers are always NULL terminated
Remove some intermediate buffers
Do not define multiple times PnP parent key
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.…
==============================================================================
--- trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c Thu Dec 27 22:02:32 2007
@@ -18,6 +18,8 @@
//#define ENABLE_ACPI
/* GLOBALS *******************************************************************/
+
+#define ENUM_ROOT L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum"
PDEVICE_NODE IopRootDeviceNode;
KSPIN_LOCK IopDeviceTreeLock;
@@ -403,12 +405,13 @@
case DevicePropertyLocationInformation:
case DevicePropertyUINumber:
{
- LPWSTR RegistryPropertyName, KeyNameBuffer;
- UNICODE_STRING KeyName, ValueName;
+ LPCWSTR RegistryPropertyName;
+ UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT);
+ UNICODE_STRING ValueName;
OBJECT_ATTRIBUTES ObjectAttributes;
KEY_VALUE_PARTIAL_INFORMATION *ValueInformation;
ULONG ValueInformationLength;
- HANDLE KeyHandle;
+ HANDLE hEnum, KeyHandle;
NTSTATUS Status;
switch (DeviceProperty)
@@ -434,62 +437,70 @@
case DevicePropertyUINumber:
RegistryPropertyName = L"UINumber"; break;
default:
- RegistryPropertyName = NULL; break;
+ /* Should not happen */
+ ASSERT(FALSE);
+ return STATUS_UNSUCCESSFUL;
}
- KeyNameBuffer = ExAllocatePool(PagedPool,
- (49 * sizeof(WCHAR)) + DeviceNode->InstancePath.Length);
-
- DPRINT("KeyNameBuffer: 0x%p, value %S\n", KeyNameBuffer,
RegistryPropertyName);
-
- if (KeyNameBuffer == NULL)
- return STATUS_INSUFFICIENT_RESOURCES;
-
- wcscpy(KeyNameBuffer,
L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
- wcscat(KeyNameBuffer, DeviceNode->InstancePath.Buffer);
- RtlInitUnicodeString(&KeyName, KeyNameBuffer);
- InitializeObjectAttributes(&ObjectAttributes, &KeyName,
- OBJ_CASE_INSENSITIVE, NULL, NULL);
-
- Status = ZwOpenKey(&KeyHandle, KEY_READ, &ObjectAttributes);
- ExFreePool(KeyNameBuffer);
- if (!NT_SUCCESS(Status))
- return Status;
-
- RtlInitUnicodeString(&ValueName, RegistryPropertyName);
- ValueInformationLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION,
- Data[0]) + BufferLength;
- ValueInformation = ExAllocatePool(PagedPool, ValueInformationLength);
- if (ValueInformation == NULL)
- {
- ZwClose(KeyHandle);
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- Status = ZwQueryValueKey(KeyHandle, &ValueName,
- KeyValuePartialInformation, ValueInformation,
- ValueInformationLength,
- &ValueInformationLength);
- *ResultLength = ValueInformation->DataLength;
- ZwClose(KeyHandle);
-
- if (!NT_SUCCESS(Status))
- {
- ExFreePool(ValueInformation);
- if (Status == STATUS_BUFFER_OVERFLOW)
- return STATUS_BUFFER_TOO_SMALL;
- else
- return Status;
- }
-
- /* FIXME: Verify the value (NULL-terminated, correct format). */
-
- RtlCopyMemory(PropertyBuffer, ValueInformation->Data,
- ValueInformation->DataLength);
- ExFreePool(ValueInformation);
-
- return STATUS_SUCCESS;
- }
+ DPRINT("Registry property %S\n", RegistryPropertyName);
+
+ /* Open Enum key */
+ InitializeObjectAttributes(&ObjectAttributes, &EnumU,
+ OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL,
NULL);
+ Status = ZwOpenKey(&hEnum, 0, &ObjectAttributes);
+ if (!NT_SUCCESS(Status))
+ return Status;
+
+ /* Open instance key */
+ InitializeObjectAttributes(&ObjectAttributes,
&DeviceNode->InstancePath,
+ OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, hEnum,
NULL);
+ Status = ZwOpenKey(&KeyHandle, KEY_READ, &ObjectAttributes);
+ ZwClose(hEnum);
+ if (!NT_SUCCESS(Status))
+ return Status;
+
+ /* Allocate buffer to read as much data as required by the caller */
+ ValueInformationLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION,
+ Data[0]) + BufferLength;
+ ValueInformation = ExAllocatePool(PagedPool, ValueInformationLength);
+ if (!ValueInformation)
+ {
+ ZwClose(KeyHandle);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ /* Read the value */
+ RtlInitUnicodeString(&ValueName, RegistryPropertyName);
+ Status = ZwQueryValueKey(KeyHandle, &ValueName,
+ KeyValuePartialInformation, ValueInformation,
+ ValueInformationLength,
+ &ValueInformationLength);
+ ZwClose(KeyHandle);
+
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePool(ValueInformation);
+ if (Status == STATUS_BUFFER_OVERFLOW)
+ {
+ *ResultLength = ValueInformation->DataLength;
+ return STATUS_BUFFER_TOO_SMALL;
+ }
+ else
+ {
+ *ResultLength = 0;
+ return Status;
+ }
+ }
+
+ /* Return data */
+ *ResultLength = ValueInformation->DataLength;
+ /* FIXME: Verify the value (NULL-terminated, correct format). */
+ RtlCopyMemory(PropertyBuffer, ValueInformation->Data,
+ ValueInformation->DataLength);
+ ExFreePool(ValueInformation);
+
+ return STATUS_SUCCESS;
+ }
case DevicePropertyBootConfiguration:
Length = 0;
@@ -510,43 +521,36 @@
Data = &DeviceNode->BootResources;
break;
- case DevicePropertyEnumeratorName:
- Ptr = wcschr(DeviceNode->InstancePath.Buffer, L'\\');
- if (Ptr != NULL)
- {
- Length = (ULONG)((ULONG_PTR)Ptr - (ULONG_PTR)DeviceNode->InstancePath.Buffer)
+ sizeof(WCHAR);
- Data = DeviceNode->InstancePath.Buffer;
- }
- else
- {
- Length = 0;
- Data = NULL;
- }
- break;
-
- case DevicePropertyPhysicalDeviceObjectName:
- Length = DeviceNode->InstancePath.Length + sizeof(WCHAR);
- Data = DeviceNode->InstancePath.Buffer;
- break;
-
- default:
- return STATUS_INVALID_PARAMETER_2;
- }
-
- *ResultLength = Length;
- if (BufferLength < Length)
- return STATUS_BUFFER_TOO_SMALL;
- RtlCopyMemory(PropertyBuffer, Data, Length);
-
- /* Terminate the string */
- if (DeviceProperty == DevicePropertyEnumeratorName
- || DeviceProperty == DevicePropertyPhysicalDeviceObjectName)
- {
- Ptr = (PWSTR)PropertyBuffer;
- Ptr[(Length / sizeof(WCHAR)) - 1] = 0;
- }
-
- return STATUS_SUCCESS;
+ case DevicePropertyEnumeratorName:
+ /* A buffer overflow can't happen here, since InstancePath
+ * always contains the enumerator name followed by \\ */
+ Ptr = wcschr(DeviceNode->InstancePath.Buffer, L'\\');
+ ASSERT(Ptr);
+ Length = (Ptr - DeviceNode->InstancePath.Buffer + 1) * sizeof(WCHAR);
+ Data = DeviceNode->InstancePath.Buffer;
+ break;
+
+ case DevicePropertyPhysicalDeviceObjectName:
+ /* InstancePath buffer is NULL terminated, so we can do this */
+ Length = DeviceNode->InstancePath.MaximumLength;
+ Data = DeviceNode->InstancePath.Buffer;
+ break;
+
+ default:
+ return STATUS_INVALID_PARAMETER_2;
+ }
+
+ /* Prepare returned values */
+ *ResultLength = Length;
+ if (BufferLength < Length)
+ return STATUS_BUFFER_TOO_SMALL;
+ RtlCopyMemory(PropertyBuffer, Data, Length);
+
+ /* NULL terminate the string (if required) */
+ if (DeviceProperty == DevicePropertyEnumeratorName)
+ ((LPWSTR)PropertyBuffer)[Length / sizeof(WCHAR)] = UNICODE_NULL;
+
+ return STATUS_SUCCESS;
}
/*
@@ -1062,82 +1066,110 @@
}
-static
+/*
+ * IopCreateDeviceKeyPath
+ *
+ * Creates a registry key
+ *
+ * Parameters
+ * RegistryPath
+ * Name of the key to be created.
+ * Handle
+ * Handle to the newly created key
+ *
+ * Remarks
+ * This method can create nested trees, so parent of RegistryPath can
+ * be not existant, and will be created if needed.
+ */
NTSTATUS
-IopCreateDeviceKeyPath(PWSTR Path,
- PHANDLE Handle)
-{
- OBJECT_ATTRIBUTES ObjectAttributes;
- WCHAR KeyBuffer[MAX_PATH];
- UNICODE_STRING KeyName;
- HANDLE KeyHandle;
- NTSTATUS Status;
- PWCHAR Current;
- PWCHAR Next;
-
- *Handle = NULL;
-
- if (_wcsnicmp(Path, L"\\Registry\\", 10) != 0)
- {
- return STATUS_INVALID_PARAMETER;
- }
-
- wcsncpy (KeyBuffer, Path, MAX_PATH-1);
-
- /* Skip \\Registry\\ */
- Current = KeyBuffer;
- Current = wcschr (Current, L'\\') + 1;
- Current = wcschr (Current, L'\\') + 1;
-
- while (TRUE)
- {
- Next = wcschr (Current, L'\\');
- if (Next == NULL)
- {
- /* The end */
- }
- else
- {
- *Next = 0;
- }
-
- RtlInitUnicodeString (&KeyName, KeyBuffer);
- InitializeObjectAttributes (&ObjectAttributes,
- &KeyName,
- OBJ_CASE_INSENSITIVE,
- NULL,
- NULL);
-
- DPRINT("Create '%S'\n", KeyName.Buffer);
-
- Status = ZwCreateKey (&KeyHandle,
- KEY_ALL_ACCESS,
- &ObjectAttributes,
- 0,
- NULL,
- 0,
- NULL);
- if (!NT_SUCCESS (Status))
- {
- DPRINT ("ZwCreateKey() failed with status %x\n", Status);
- return Status;
- }
-
- if (Next == NULL)
- {
- *Handle = KeyHandle;
- return STATUS_SUCCESS;
- }
- else
- {
- ZwClose (KeyHandle);
- *Next = L'\\';
- }
-
- Current = Next + 1;
- }
-
- return STATUS_UNSUCCESSFUL;
+NTAPI
+IopCreateDeviceKeyPath(IN PCUNICODE_STRING RegistryPath,
+ OUT PHANDLE Handle)
+{
+ UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT);
+ HANDLE hParent = NULL, hKey;
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ UNICODE_STRING KeyName;
+ LPCWSTR Current, Last;
+ ULONG dwLength;
+ NTSTATUS Status;
+
+ /* Assume failure */
+ *Handle = NULL;
+
+ /* Open root key for device instances */
+ InitializeObjectAttributes(&ObjectAttributes,
+ &EnumU,
+ OBJ_CASE_INSENSITIVE,
+ NULL,
+ NULL);
+ Status = ZwOpenKey(&hParent,
+ KEY_CREATE_SUB_KEY,
+ &ObjectAttributes);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ZwOpenKey('%wZ') failed with status 0x%08lx\n",
&EnumU, Status);
+ return Status;
+ }
+
+ Current = KeyName.Buffer = RegistryPath->Buffer;
+ Last = &RegistryPath->Buffer[RegistryPath->Length / sizeof(WCHAR)];
+
+ /* Go up to the end of the string */
+ while (Current <= Last)
+ {
+ if (Current != Last && *Current != '\\')
+ {
+ /* Not the end of the string and not a separator */
+ Current++;
+ continue;
+ }
+
+ /* Prepare relative key name */
+ dwLength = (ULONG_PTR)Current - (ULONG_PTR)KeyName.Buffer;
+ KeyName.MaximumLength = KeyName.Length = dwLength;
+ DPRINT("Create '%wZ'\n", &KeyName);
+
+ /* Open key */
+ InitializeObjectAttributes(&ObjectAttributes,
+ &KeyName,
+ OBJ_CASE_INSENSITIVE,
+ hParent,
+ NULL);
+ Status = ZwCreateKey(&hKey,
+ Current == Last ? KEY_ALL_ACCESS : KEY_CREATE_SUB_KEY,
+ &ObjectAttributes,
+ 0,
+ NULL,
+ 0,
+ NULL);
+
+ /* Close parent key handle, we don't need it anymore */
+ if (hParent)
+ ZwClose(hParent);
+
+ /* Key opening/creating failed? */
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ZwCreateKey('%wZ') failed with status 0x%08lx\n",
&KeyName, Status);
+ return Status;
+ }
+
+ /* Check if it is the end of the string */
+ if (Current == Last)
+ {
+ /* Yes, return success */
+ *Handle = hKey;
+ return STATUS_SUCCESS;
+ }
+
+ /* Start with this new parent key */
+ hParent = hKey;
+ Current++;
+ KeyName.Buffer = (LPWSTR)Current;
+ }
+
+ return STATUS_UNSUCCESSFUL;
}
@@ -1224,41 +1256,6 @@
&DefaultConfigFlags,
sizeof(DefaultConfigFlags));
}
-
-#if 0
- if (DeviceNode->PhysicalDeviceObject != NULL)
- {
- /* Create the 'Control' key */
- RtlInitUnicodeString(&KeyName,
- L"Control");
- InitializeObjectAttributes(&ObjectAttributes,
- &KeyName,
- OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
- InstanceKey,
- NULL);
- Status = ZwCreateKey(&LogConfKey,
- KEY_ALL_ACCESS,
- &ObjectAttributes,
- 0,
- NULL,
- REG_OPTION_VOLATILE,
- NULL);
- if (NT_SUCCESS(Status))
- {
- ULONG Reference = (ULONG)DeviceNode->PhysicalDeviceObject;
- RtlInitUnicodeString(&KeyName,
- L"DeviceReference");
- Status = ZwSetValueKey(LogConfKey,
- &KeyName,
- 0,
- REG_DWORD,
- &Reference,
- sizeof(PVOID));
-
- ZwClose(LogConfKey);
- }
- }
-#endif
DPRINT("IopSetDeviceInstanceData() done\n");
@@ -1606,98 +1603,96 @@
IopGetParentIdPrefix(PDEVICE_NODE DeviceNode,
PUNICODE_STRING ParentIdPrefix)
{
- ULONG KeyNameBufferLength;
- PWSTR KeyNameBuffer = NULL;
- PKEY_VALUE_PARTIAL_INFORMATION ParentIdPrefixInformation = NULL;
- UNICODE_STRING KeyName;
- UNICODE_STRING KeyValue;
- UNICODE_STRING ValueName;
- OBJECT_ATTRIBUTES ObjectAttributes;
- HANDLE hKey = NULL;
- ULONG crc32;
- NTSTATUS Status;
-
- /* HACK: As long as some devices have a NULL device
- * instance path, the following test is required :(
- */
- if (DeviceNode->Parent->InstancePath.Length == 0)
- {
- DPRINT1("Parent of %wZ has NULL Instance path, please report!\n",
- &DeviceNode->InstancePath);
- return STATUS_UNSUCCESSFUL;
- }
-
- /* 1. Try to retrieve ParentIdPrefix from registry */
- KeyNameBufferLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data[0]) + MAX_PATH
* sizeof(WCHAR);
- ParentIdPrefixInformation = ExAllocatePool(PagedPool, KeyNameBufferLength +
sizeof(WCHAR));
- if (!ParentIdPrefixInformation)
- {
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto cleanup;
- }
- KeyNameBuffer = ExAllocatePool(PagedPool, (49 * sizeof(WCHAR)) +
DeviceNode->Parent->InstancePath.Length);
- if (!KeyNameBuffer)
- {
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto cleanup;
- }
- wcscpy(KeyNameBuffer,
L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
- wcscat(KeyNameBuffer, DeviceNode->Parent->InstancePath.Buffer);
- RtlInitUnicodeString(&KeyName, KeyNameBuffer);
- InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE |
OBJ_KERNEL_HANDLE, NULL, NULL);
- Status = ZwOpenKey(&hKey, KEY_QUERY_VALUE | KEY_SET_VALUE,
&ObjectAttributes);
- if (!NT_SUCCESS(Status))
- goto cleanup;
- RtlInitUnicodeString(&ValueName, L"ParentIdPrefix");
- Status = ZwQueryValueKey(
- hKey, &ValueName,
- KeyValuePartialInformation, ParentIdPrefixInformation,
- KeyNameBufferLength, &KeyNameBufferLength);
- if (NT_SUCCESS(Status))
- {
- if (ParentIdPrefixInformation->Type != REG_SZ)
- Status = STATUS_UNSUCCESSFUL;
- else
- {
- KeyValue.Length = KeyValue.MaximumLength =
(USHORT)ParentIdPrefixInformation->DataLength;
- KeyValue.Buffer = (PWSTR)ParentIdPrefixInformation->Data;
- }
- goto cleanup;
- }
- if (Status != STATUS_OBJECT_NAME_NOT_FOUND)
- {
- KeyValue.Length = KeyValue.MaximumLength =
(USHORT)ParentIdPrefixInformation->DataLength;
- KeyValue.Buffer = (PWSTR)ParentIdPrefixInformation->Data;
- goto cleanup;
- }
-
- /* 2. Create the ParentIdPrefix value */
- crc32 = RtlComputeCrc32(0,
- (PUCHAR)DeviceNode->Parent->InstancePath.Buffer,
- DeviceNode->Parent->InstancePath.Length);
-
- swprintf((PWSTR)ParentIdPrefixInformation->Data, L"%lx&%lx",
DeviceNode->Parent->Level, crc32);
- RtlInitUnicodeString(&KeyValue, (PWSTR)ParentIdPrefixInformation->Data);
-
- /* 3. Try to write the ParentIdPrefix to registry */
- Status = ZwSetValueKey(hKey,
- &ValueName,
- 0,
- REG_SZ,
- (PVOID)KeyValue.Buffer,
- (wcslen(KeyValue.Buffer) + 1) * sizeof(WCHAR));
+ ULONG BufferLength;
+ UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT);
+ PKEY_VALUE_PARTIAL_INFORMATION ParentIdPrefixInformation;
+ UNICODE_STRING KeyValue;
+ UNICODE_STRING ValueName = RTL_CONSTANT_STRING(L"ParentIdPrefix");
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ HANDLE hEnum, hKey = NULL;
+ ULONG crc32;
+ NTSTATUS Status;
+
+ /* Allocate a buffer big enough to read a MAX_PATH prefix */
+ BufferLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data[0]) + MAX_PATH *
sizeof(WCHAR);
+ ParentIdPrefixInformation = ExAllocatePool(PagedPool, BufferLength + sizeof(WCHAR));
+
+ /* Check if allocation succeeded */
+ if (!ParentIdPrefixInformation)
+ {
+ Status = STATUS_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Open enum key */
+ InitializeObjectAttributes(&ObjectAttributes, &EnumU, OBJ_CASE_INSENSITIVE |
OBJ_KERNEL_HANDLE, NULL, NULL);
+ Status = ZwOpenKey(&hEnum, 0, &ObjectAttributes);
+ if (!NT_SUCCESS(Status))
+ goto cleanup;
+
+ /* Open instance key */
+ InitializeObjectAttributes(&ObjectAttributes,
&DeviceNode->Parent->InstancePath, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
hEnum, NULL);
+ Status = ZwOpenKey(&hKey, KEY_QUERY_VALUE | KEY_SET_VALUE,
&ObjectAttributes);
+ ZwClose(hEnum);
+ if (!NT_SUCCESS(Status))
+ goto cleanup;
+
+ /* Read the prefix */
+ Status = ZwQueryValueKey(
+ hKey, &ValueName,
+ KeyValuePartialInformation, ParentIdPrefixInformation,
+ BufferLength, &BufferLength);
+ if (NT_SUCCESS(Status))
+ {
+ /* Yes, we read something */
+ if (ParentIdPrefixInformation->Type != REG_SZ)
+ /* Hm, it was of the wrong type. Fail */
+ Status = STATUS_UNSUCCESSFUL;
+ else
+ {
+ /* OK, value is correct ; prepare to return it */
+ KeyValue.Length = KeyValue.MaximumLength =
(USHORT)ParentIdPrefixInformation->DataLength;
+ KeyValue.Buffer = (PWSTR)ParentIdPrefixInformation->Data;
+ }
+
+ /* We're done */
+ goto cleanup;
+ }
+
+ /* Check if we failed due to value not calculated */
+ if (Status != STATUS_OBJECT_NAME_NOT_FOUND)
+ /* Another reason, fail */
+ goto cleanup;
+
+ /* Compute the prefix string of the parent */
+ crc32 = RtlComputeCrc32(0,
+ (PUCHAR)DeviceNode->Parent->InstancePath.Buffer,
+ DeviceNode->Parent->InstancePath.Length);
+
+ /* Prepare the value to return */
+ /* (yes, it's safe to reuse ParentIdPrefixInformation buffer, which is at least
MAX_PATH WCHARs long */
+ swprintf((PWSTR)ParentIdPrefixInformation, L"%lx&%lx",
DeviceNode->Parent->Level, crc32);
+ RtlInitUnicodeString(&KeyValue, (PWSTR)ParentIdPrefixInformation);
+
+ /* 3. Try to write the ParentIdPrefix to registry */
+ Status = ZwSetValueKey(hKey,
+ &ValueName,
+ 0,
+ REG_SZ,
+ (PVOID)KeyValue.Buffer,
+ KeyValue.MaximumLength);
cleanup:
- if (NT_SUCCESS(Status))
- {
- /* Duplicate the string to return it */
- Status = RtlDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE,
&KeyValue, ParentIdPrefix);
- }
- ExFreePool(ParentIdPrefixInformation);
- ExFreePool(KeyNameBuffer);
- if (hKey != NULL)
- ZwClose(hKey);
- return Status;
+ if (NT_SUCCESS(Status))
+ {
+ /* Duplicate the string to return it */
+ Status = RtlDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE,
&KeyValue, ParentIdPrefix);
+ }
+ /* General cleanup */
+ ExFreePool(ParentIdPrefixInformation);
+ if (hKey != NULL)
+ ZwClose(hKey);
+ return Status;
}
@@ -1727,9 +1722,9 @@
IO_STATUS_BLOCK IoStatusBlock;
PDEVICE_NODE ParentDeviceNode;
WCHAR InstancePath[MAX_PATH];
+ UNICODE_STRING InstancePathU = { 0, sizeof(InstancePath), InstancePath };
IO_STACK_LOCATION Stack;
NTSTATUS Status;
- PWSTR KeyBuffer;
PWSTR Ptr;
USHORT Length;
USHORT TotalLength;
@@ -1791,12 +1786,7 @@
if (NT_SUCCESS(Status))
{
/* Copy the device id string */
- wcscpy(InstancePath, (PWSTR)IoStatusBlock.Information);
-
- /*
- * FIXME: Check for valid characters, if there is invalid characters
- * then bugcheck.
- */
+ RtlAppendUnicodeToString(&InstancePathU, (PWSTR)IoStatusBlock.Information);
}
else
{
@@ -1834,21 +1824,16 @@
if (NT_SUCCESS(Status))
{
/* Append the instance id string */
- wcscat(InstancePath, L"\\");
+ RtlAppendUnicodeToString(&InstancePathU, L"\\");
if (ParentIdPrefix.Length > 0)
{
/* Add information from parent bus device to InstancePath */
- wcscat(InstancePath, ParentIdPrefix.Buffer);
+ RtlAppendUnicodeStringToString(&InstancePathU, &ParentIdPrefix);
if (IoStatusBlock.Information && *(PWSTR)IoStatusBlock.Information)
- wcscat(InstancePath, L"&");
+ RtlAppendUnicodeToString(&InstancePathU, L"&");
}
if (IoStatusBlock.Information)
- wcscat(InstancePath, (PWSTR)IoStatusBlock.Information);
-
- /*
- * FIXME: Check for valid characters, if there is invalid characters
- * then bugcheck
- */
+ RtlAppendUnicodeToString(&InstancePathU, (PWSTR)IoStatusBlock.Information);
}
else
{
@@ -1856,29 +1841,25 @@
}
RtlFreeUnicodeString(&ParentIdPrefix);
- if (!RtlCreateUnicodeString(&DeviceNode->InstancePath, InstancePath))
- {
- DPRINT("No resources\n");
- /* FIXME: Cleanup and disable device */
- }
-
- DPRINT("InstancePath is %S\n", DeviceNode->InstancePath.Buffer);
-
- /*
- * Create registry key for the instance id, if it doesn't exist yet
- */
- KeyBuffer = ExAllocatePool(
- PagedPool,
- (49 * sizeof(WCHAR)) + DeviceNode->InstancePath.Length);
- wcscpy(KeyBuffer,
L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
- wcscat(KeyBuffer, DeviceNode->InstancePath.Buffer);
- Status = IopCreateDeviceKeyPath(KeyBuffer, &InstanceKey);
- ExFreePool(KeyBuffer);
- if (!NT_SUCCESS(Status))
- {
- DPRINT1("Failed to create the instance key! (Status %lx)\n", Status);
- }
-
+ /*
+ * FIXME: Check for valid characters, if there is invalid characters
+ * then bugcheck.
+ */
+
+ Status = RtlDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE,
+ &InstancePathU,
&DeviceNode->InstancePath);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("No resources\n");
+ /* FIXME: Cleanup and disable device */
+ }
+
+ DPRINT("InstancePath is %wZ\n", &DeviceNode->InstancePath);
+
+ /* Create registry key for the instance id, if it doesn't exist yet */
+ Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, &InstanceKey);
+ if (!NT_SUCCESS(Status))
+ DPRINT1("IopCreateDeviceKeyPath('%wZ') failed (Status
0x%08lx)\n", &DeviceNode->InstancePath, Status);
{
/* Set 'Capabilities' value */
@@ -2329,102 +2310,106 @@
IopActionConfigureChildServices(PDEVICE_NODE DeviceNode,
PVOID Context)
{
- RTL_QUERY_REGISTRY_TABLE QueryTable[3];
- PDEVICE_NODE ParentDeviceNode;
- PUNICODE_STRING Service;
- UNICODE_STRING ClassGUID;
- NTSTATUS Status;
-
- DPRINT("IopActionConfigureChildServices(%p, %p)\n", DeviceNode, Context);
-
- ParentDeviceNode = (PDEVICE_NODE)Context;
-
- /*
- * We are called for the parent too, but we don't need to do special
- * handling for this node
- */
- if (DeviceNode == ParentDeviceNode)
- {
- DPRINT("Success\n");
- return STATUS_SUCCESS;
- }
-
- /*
- * Make sure this device node is a direct child of the parent device node
- * that is given as an argument
- */
- if (DeviceNode->Parent != ParentDeviceNode)
- {
- /* Stop the traversal immediately and indicate successful operation */
- DPRINT("Stop\n");
- return STATUS_UNSUCCESSFUL;
- }
-
- if (!IopDeviceNodeHasFlag(DeviceNode, DNF_DISABLED))
- {
- WCHAR RegKeyBuffer[MAX_PATH];
- UNICODE_STRING RegKey;
-
- RegKey.Length = 0;
- RegKey.MaximumLength = sizeof(RegKeyBuffer);
- RegKey.Buffer = RegKeyBuffer;
-
- /*
- * Retrieve configuration from Enum key
- */
-
- Service = &DeviceNode->ServiceName;
-
- RtlZeroMemory(QueryTable, sizeof(QueryTable));
- RtlInitUnicodeString(Service, NULL);
- RtlInitUnicodeString(&ClassGUID, NULL);
-
- QueryTable[0].Name = L"Service";
- QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_REQUIRED;
- QueryTable[0].EntryContext = Service;
-
- QueryTable[1].Name = L"ClassGUID";
- QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
- QueryTable[1].EntryContext = &ClassGUID;
- QueryTable[1].DefaultType = REG_SZ;
- QueryTable[1].DefaultData = L"";
- QueryTable[1].DefaultLength = 0;
-
- RtlAppendUnicodeToString(&RegKey,
L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
- RtlAppendUnicodeStringToString(&RegKey, &DeviceNode->InstancePath);
-
- Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
- RegKey.Buffer, QueryTable, NULL, NULL);
-
- if (!NT_SUCCESS(Status))
- {
- /* FIXME: Log the error */
- DPRINT("Could not retrieve configuration for device %wZ (Status
0x%08x)\n",
- &DeviceNode->InstancePath, Status);
- IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
- return STATUS_SUCCESS;
- }
-
- if (Service->Buffer == NULL)
- {
- IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
-
- if (ClassGUID.Length != 0)
- {
- /* Device has a ClassGUID value, but no Service value.
- * Suppose it is using the NULL driver, so state the
- * device is started */
- DPRINT1("%wZ is using NULL driver\n",
&DeviceNode->InstancePath);
- IopDeviceNodeSetFlag(DeviceNode, DNF_STARTED);
- DeviceNode->Flags |= DN_STARTED;
- }
- return STATUS_SUCCESS;
- }
-
- DPRINT("Got Service %S\n", Service->Buffer);
- }
-
- return STATUS_SUCCESS;
+ RTL_QUERY_REGISTRY_TABLE QueryTable[4];
+ PDEVICE_NODE ParentDeviceNode;
+ PUNICODE_STRING Service;
+ UNICODE_STRING ClassGUID;
+ NTSTATUS Status;
+
+ DPRINT("IopActionConfigureChildServices(%p, %p)\n", DeviceNode, Context);
+
+ ParentDeviceNode = (PDEVICE_NODE)Context;
+
+ /*
+ * We are called for the parent too, but we don't need to do special
+ * handling for this node
+ */
+ if (DeviceNode == ParentDeviceNode)
+ {
+ DPRINT("Success\n");
+ return STATUS_SUCCESS;
+ }
+
+ /*
+ * Make sure this device node is a direct child of the parent device node
+ * that is given as an argument
+ */
+ ASSERT(DeviceNode->Parent == ParentDeviceNode);
+
+ if (!IopDeviceNodeHasFlag(DeviceNode, DNF_DISABLED))
+ {
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT);
+ HANDLE hEnum;
+
+ /* Open Enum key */
+ InitializeObjectAttributes(&ObjectAttributes, &EnumU,
+ OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL)
+ Status = ZwOpenKey(&hEnum, 0, &ObjectAttributes);
+ if (!NT_SUCCESS(Status))
+ {
+ /* FIXME: Log the error */
+ IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
+ return Status;
+ }
+
+ /* Prepare query table */
+ RtlZeroMemory(QueryTable, sizeof(QueryTable));
+ Service = &DeviceNode->ServiceName;
+ RtlInitUnicodeString(Service, NULL);
+ RtlInitUnicodeString(&ClassGUID, NULL);
+
+ /* Hopefully, this string is always NULL terminated */
+ QueryTable[0].Name = DeviceNode->InstancePath.Buffer;
+ QueryTable[0].Flags = RTL_QUERY_REGISTRY_SUBKEY;
+
+ QueryTable[1].Name = L"Service";
+ QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_REQUIRED;
+ QueryTable[1].EntryContext = Service;
+
+ QueryTable[2].Name = L"ClassGUID";
+ QueryTable[2].Flags = RTL_QUERY_REGISTRY_DIRECT;
+ QueryTable[2].EntryContext = &ClassGUID;
+ QueryTable[2].DefaultType = REG_SZ;
+ QueryTable[2].DefaultData = L"";
+ QueryTable[2].DefaultLength = 0;
+
+ /* Read registry */
+ Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE, (PWSTR)hEnum,
+ QueryTable, NULL, NULL);
+ ZwClose(hEnum);
+
+ /* Check for an error */
+ if (!NT_SUCCESS(Status))
+ {
+ /* FIXME: Log the error */
+ DPRINT("Could not retrieve configuration for device %wZ (Status
0x%08x)\n",
+ &DeviceNode->InstancePath, Status);
+ IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
+ return STATUS_SUCCESS;
+ }
+
+ /* Check for a NULL service */
+ if (Service->Length == 0)
+ {
+ IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
+
+ if (ClassGUID.Length != 0)
+ {
+ /* Device has a ClassGUID value, but no Service value.
+ * Suppose it is using the NULL driver, so state the
+ * device is started */
+ DPRINT1("%wZ is using NULL driver\n",
&DeviceNode->InstancePath);
+ IopDeviceNodeSetFlag(DeviceNode, DNF_STARTED);
+ DeviceNode->Flags |= DN_STARTED;
+ }
+ return STATUS_SUCCESS;
+ }
+
+ DPRINT("Got Service %wZ\n", Service);
+ }
+
+ return STATUS_SUCCESS;
}
/*
@@ -2476,16 +2461,7 @@
* Make sure this device node is a direct child of the parent device node
* that is given as an argument
*/
-#if 0
- if (DeviceNode->Parent != ParentDeviceNode)
- {
- /*
- * Stop the traversal immediately and indicate unsuccessful operation
- */
- DPRINT("Stop\n");
- return STATUS_UNSUCCESSFUL;
- }
-#endif
+ ASSERT(DeviceNode->Parent == ParentDeviceNode);
if (!IopDeviceNodeHasFlag(DeviceNode, DNF_DISABLED) &&
!IopDeviceNodeHasFlag(DeviceNode, DNF_ADDED) &&
@@ -2563,8 +2539,8 @@
IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
IopDeviceNodeSetFlag(DeviceNode, DNF_START_FAILED);
/* FIXME: Log the error (possibly in IopInitializeDeviceNodeService) */
- CPRINT("Initialization of service %S failed (Status %x)\n",
- DeviceNode->ServiceName.Buffer, Status);
+ DPRINT("Initialization of service %wZ failed (Status %x)\n",
+ &DeviceNode->ServiceName, Status);
}
}
}
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hpoussin＠svn.reactos.org