[janderwald] 55238: [USBHUB_NEW] - Rewrite GetDeviceIds function - Don't rely on hardcoded constants when building the device id strings - Don't corrupt the device id string when building the insta...
27 Jan
2012
27 Jan
'12
12:29 p.m.
Author: janderwald
Date: Fri Jan 27 12:29:18 2012
New Revision: 55238
URL: http://svn.reactos.org/svn/reactos?rev=55238&view=rev
Log:
[USBHUB_NEW]
- Rewrite GetDeviceIds function
- Don't rely on hardcoded constants when building the device id strings
- Don't corrupt the device id string when building the instance id string
- Fix bug in GetUsbStringDescriptor which read beyond the allocated string when copying
the result.
Modified:
branches/usb-bringup-trunk/drivers/usb/usbhub_new/fdo.c
branches/usb-bringup-trunk/drivers/usb/usbhub_new/pdo.c
Modified: branches/usb-bringup-trunk/drivers/usb/usbhub_new/fdo.c
URL:
http://svn.reactos.org/svn/reactos/branches/usb-bringup-trunk/drivers/usb/u…
==============================================================================
--- branches/usb-bringup-trunk/drivers/usb/usbhub_new/fdo.c [iso-8859-1] (original)
+++ branches/usb-bringup-trunk/drivers/usb/usbhub_new/fdo.c [iso-8859-1] Fri Jan 27
12:29:18 2012
@@ -700,6 +700,7 @@
NTSTATUS Status;
PUSB_STRING_DESCRIPTOR StringDesc = NULL;
ULONG SizeNeeded;
+ LPWSTR Buffer;
StringDesc = ExAllocatePoolWithTag(NonPagedPool,
sizeof(USB_STRING_DESCRIPTOR),
@@ -777,23 +778,29 @@
//
// Allocate Buffer to return
//
- *TransferBuffer = ExAllocatePoolWithTag(NonPagedPool,
- SizeNeeded,
- USB_HUB_TAG);
- if (!*TransferBuffer)
+ Buffer = ExAllocatePoolWithTag(NonPagedPool,
+ SizeNeeded,
+ USB_HUB_TAG);
+ if (!Buffer)
{
DPRINT1("Failed to allocate buffer for string!\n");
ExFreePool(StringDesc);
return STATUS_INSUFFICIENT_RESOURCES;
}
-
- RtlZeroMemory(*TransferBuffer, SizeNeeded);
+ DPRINT1("Buffer %p\n", Buffer);
+ RtlZeroMemory(Buffer, SizeNeeded);
+
+ DPRINT1("Buffer %p\n", Buffer);
+ DPRINT1("SizeNeeded %lu\n", SizeNeeded);
+ DPRINT1("Offset %lu\n", FIELD_OFFSET(USB_STRING_DESCRIPTOR, bLength));
+ DPRINT1("Length %lu\n", SizeNeeded - FIELD_OFFSET(USB_STRING_DESCRIPTOR,
bLength));
//
// Copy the string to destination
//
- RtlCopyMemory(*TransferBuffer, StringDesc->bString, SizeNeeded -
FIELD_OFFSET(USB_STRING_DESCRIPTOR, bLength));
+ RtlCopyMemory(Buffer, StringDesc->bString, SizeNeeded -
FIELD_OFFSET(USB_STRING_DESCRIPTOR, bString));
*Size = SizeNeeded;
+ *TransferBuffer = Buffer;
ExFreePool(StringDesc);
@@ -852,9 +859,9 @@
PDEVICE_OBJECT UsbChildDeviceObject)
{
NTSTATUS Status = STATUS_SUCCESS;
- ULONG Index;
- PWCHAR BufferPtr;
- WCHAR Buffer[100];
+ ULONG Index = 0;
+ LPWSTR DeviceString;
+ WCHAR Buffer[200];
PHUB_CHILDDEVICE_EXTENSION UsbChildExtension;
PUSB_DEVICE_DESCRIPTOR DeviceDescriptor;
PUSB_CONFIGURATION_DESCRIPTOR ConfigurationDescriptor;
@@ -866,27 +873,6 @@
UsbChildExtension =
(PHUB_CHILDDEVICE_EXTENSION)UsbChildDeviceObject->DeviceExtension;
//
- // Initialize the CompatibleIds String
- //
- UsbChildExtension->usCompatibleIds.Length = 188; //FIXME
- UsbChildExtension->usCompatibleIds.MaximumLength =
UsbChildExtension->usCompatibleIds.Length;
-
- //
- // allocate mem for compatible id string
- //
- BufferPtr = ExAllocatePoolWithTag(NonPagedPool,
- UsbChildExtension->usCompatibleIds.Length,
- USB_HUB_TAG);
- if (!BufferPtr)
- {
- DPRINT1("Failed to allocate memory\n");
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- RtlZeroMemory(BufferPtr, UsbChildExtension->usCompatibleIds.Length);
- Index = 0;
-
- //
// get device descriptor
//
DeviceDescriptor = &UsbChildExtension->DeviceDesc;
@@ -897,9 +883,10 @@
ConfigurationDescriptor = UsbChildExtension->FullConfigDesc;
//
- // get interface descriptor
- //
- InterfaceDescriptor = (PUSB_INTERFACE_DESCRIPTOR)(ConfigurationDescriptor + 1);
+ // use first interface descriptor available
+ //
+ InterfaceDescriptor = USBD_ParseConfigurationDescriptorEx(ConfigurationDescriptor,
ConfigurationDescriptor, 0, -1, -1, -1, -1);
+ ASSERT(InterfaceDescriptor);
//
// Construct the CompatibleIds
@@ -911,17 +898,16 @@
//
ASSERT(DeviceDescriptor->bNumConfigurations == 1);
ASSERT(ConfigurationDescriptor->bNumInterfaces > 1);
-
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\DevClass_%02x&SubClass_%02x&Prot_%02x",
DeviceDescriptor->bDeviceClass,
DeviceDescriptor->bDeviceSubClass, DeviceDescriptor->bDeviceProtocol) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\DevClass_%02x&SubClass_%02x",
DeviceDescriptor->bDeviceClass,
DeviceDescriptor->bDeviceSubClass) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\DevClass_%02x",
DeviceDescriptor->bDeviceClass) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\COMPOSITE") + 1;
}
else
@@ -938,85 +924,109 @@
if (DeviceDescriptor->bDeviceClass == 0)
{
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x&SubClass_%02x&Prot_%02x",
InterfaceDescriptor->bInterfaceClass,
InterfaceDescriptor->bInterfaceSubClass, InterfaceDescriptor->bInterfaceProtocol) +
1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x&SubClass_%02x",
InterfaceDescriptor->bInterfaceClass,
InterfaceDescriptor->bInterfaceSubClass) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x",
InterfaceDescriptor->bInterfaceClass) + 1;
}
else
{
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x&SubClass_%02x&Prot_%02x",
DeviceDescriptor->bDeviceClass,
DeviceDescriptor->bDeviceSubClass, DeviceDescriptor->bDeviceProtocol) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x&SubClass_%02x",
DeviceDescriptor->bDeviceClass,
DeviceDescriptor->bDeviceSubClass) + 1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Class_%02x",
DeviceDescriptor->bDeviceClass) + 1;
-
-
- }
- }
-
- BufferPtr[Index] = UNICODE_NULL;
- UsbChildExtension->usCompatibleIds.Buffer = BufferPtr;
+ }
+ }
+
+ //
+ // now allocate the buffer
+ //
+ DeviceString = ExAllocatePool(NonPagedPool, (Index + 1) * sizeof(WCHAR));
+ if (!DeviceString)
+ {
+ //
+ // no memory
+ //
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ //
+ // copy buffer
+ //
+ RtlCopyMemory(DeviceString, Buffer, Index * sizeof(WCHAR));
+ DeviceString[Index] = UNICODE_NULL;
+ UsbChildExtension->usCompatibleIds.Buffer = DeviceString;
+ UsbChildExtension->usCompatibleIds.Length = Index * sizeof(WCHAR);
+ UsbChildExtension->usCompatibleIds.MaximumLength = (Index + 1) * sizeof(WCHAR);
DPRINT1("usCompatibleIds %wZ\n",
&UsbChildExtension->usCompatibleIds);
//
- // Initialize the DeviceId String
- //
- UsbChildExtension->usDeviceId.Length = 44;
- UsbChildExtension->usDeviceId.MaximumLength =
UsbChildExtension->usDeviceId.Length;
- BufferPtr = ExAllocatePoolWithTag(NonPagedPool,
- UsbChildExtension->usDeviceId.Length,
- USB_HUB_TAG);
- if (!BufferPtr)
- {
- DPRINT1("Failed to allocate memory\n");
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto Cleanup;
- }
-
- //
- // Construct DeviceId
- //
- swprintf(BufferPtr, L"USB\\Vid_%04x&Pid_%04x\0",
UsbChildExtension->DeviceDesc.idVendor, UsbChildExtension->DeviceDesc.idProduct);
- UsbChildExtension->usDeviceId.Buffer = BufferPtr;
+ // Construct DeviceId string
+ //
+ Index = swprintf(Buffer, L"USB\\Vid_%04x&Pid_%04x",
UsbChildExtension->DeviceDesc.idVendor, UsbChildExtension->DeviceDesc.idProduct) +
1;
+
+ //
+ // now allocate the buffer
+ //
+ DeviceString = ExAllocatePool(NonPagedPool, Index * sizeof(WCHAR));
+ if (!DeviceString)
+ {
+ //
+ // no memory
+ //
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ //
+ // copy buffer
+ //
+ RtlCopyMemory(DeviceString, Buffer, Index * sizeof(WCHAR));
+ UsbChildExtension->usDeviceId.Buffer = DeviceString;
+ UsbChildExtension->usDeviceId.Length = (Index-1) * sizeof(WCHAR);
+ UsbChildExtension->usDeviceId.MaximumLength = Index * sizeof(WCHAR);
DPRINT1("usDeviceId %wZ\n", &UsbChildExtension->usDeviceId);
//
- // Initialize the HardwareId String
- //
- UsbChildExtension->usHardwareIds.Length = 110;
- UsbChildExtension->usHardwareIds.MaximumLength =
UsbChildExtension->usHardwareIds.Length;
- BufferPtr = ExAllocatePoolWithTag(NonPagedPool,
UsbChildExtension->usHardwareIds.Length, USB_HUB_TAG);
- if (!BufferPtr)
- {
- DPRINT1("Failed to allocate memory\n");
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto Cleanup;
- }
-
- RtlZeroMemory(BufferPtr, UsbChildExtension->usHardwareIds.Length);
-
- //
- // Consturct HardwareIds
+ // Construct HardwareIds
//
Index = 0;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Vid_%04x&Pid_%04x&Rev_%04x",
UsbChildExtension->DeviceDesc.idVendor,
UsbChildExtension->DeviceDesc.idProduct, UsbChildExtension->DeviceDesc.bcdDevice) +
1;
- Index += swprintf(&BufferPtr[Index],
+ Index += swprintf(&Buffer[Index],
L"USB\\Vid_%04x&Pid_%04x",
UsbChildExtension->DeviceDesc.idVendor,
UsbChildExtension->DeviceDesc.idProduct) + 1;
- BufferPtr[Index] = UNICODE_NULL;
- UsbChildExtension->usHardwareIds.Buffer = BufferPtr;
+
+ //
+ // now allocate the buffer
+ //
+ DeviceString = ExAllocatePool(NonPagedPool, (Index + 1) * sizeof(WCHAR));
+ if (!DeviceString)
+ {
+ //
+ // no memory
+ //
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ //
+ // copy buffer
+ //
+ RtlCopyMemory(DeviceString, Buffer, Index * sizeof(WCHAR));
+ DeviceString[Index] = UNICODE_NULL;
+ UsbChildExtension->usHardwareIds.Buffer = DeviceString;
+ UsbChildExtension->usHardwareIds.Length = (Index + 1) * sizeof(WCHAR);
+ UsbChildExtension->usHardwareIds.MaximumLength = (Index + 1) * sizeof(WCHAR);
DPRINT1("usHardWareIds %wZ\n", &UsbChildExtension->usHardwareIds);
//
@@ -1036,7 +1046,7 @@
if (!NT_SUCCESS(Status))
{
DPRINT1("USBHUB: GetUsbStringDescriptor failed with status %x\n",
Status);
- goto Cleanup;
+ return Status;
}
UsbChildExtension->usTextDescription.MaximumLength =
UsbChildExtension->usTextDescription.Length;
@@ -1056,7 +1066,7 @@
if (!NT_SUCCESS(Status))
{
DPRINT1("USBHUB: GetUsbStringDescriptor failed with status %x\n",
Status);
- goto Cleanup;
+ return Status;
}
UsbChildExtension->usInstanceId.MaximumLength =
UsbChildExtension->usInstanceId.Length;
@@ -1073,35 +1083,17 @@
{
DPRINT1("Error: failed to allocate %lu bytes\n", Index *
sizeof(WCHAR));
Status = STATUS_INSUFFICIENT_RESOURCES;
- goto Cleanup;
+ return Status;
}
//
// copy instance id
//
RtlCopyMemory(UsbChildExtension->usInstanceId.Buffer, Buffer, Index *
sizeof(WCHAR));
- UsbChildExtension->usInstanceId.Length =
UsbChildExtension->usDeviceId.MaximumLength = Index * sizeof(WCHAR);
+ UsbChildExtension->usInstanceId.Length =
UsbChildExtension->usInstanceId.MaximumLength = Index * sizeof(WCHAR);
DPRINT1("usDeviceId %wZ\n", &UsbChildExtension->usInstanceId);
}
-
-
- return Status;
-
-Cleanup:
- //
- // Free Memory
- //
- if (UsbChildExtension->usCompatibleIds.Buffer)
- ExFreePool(UsbChildExtension->usCompatibleIds.Buffer);
- if (UsbChildExtension->usDeviceId.Buffer)
- ExFreePool(UsbChildExtension->usDeviceId.Buffer);
- if (UsbChildExtension->usHardwareIds.Buffer)
- ExFreePool(UsbChildExtension->usHardwareIds.Buffer);
- if (UsbChildExtension->usTextDescription.Buffer)
- ExFreePool(UsbChildExtension->usTextDescription.Buffer);
- if (UsbChildExtension->usInstanceId.Buffer)
- ExFreePool(UsbChildExtension->usInstanceId.Buffer);
return Status;
}
Modified: branches/usb-bringup-trunk/drivers/usb/usbhub_new/pdo.c
URL:
http://svn.reactos.org/svn/reactos/branches/usb-bringup-trunk/drivers/usb/u…
==============================================================================
--- branches/usb-bringup-trunk/drivers/usb/usbhub_new/pdo.c [iso-8859-1] (original)
+++ branches/usb-bringup-trunk/drivers/usb/usbhub_new/pdo.c [iso-8859-1] Fri Jan 27
12:29:18 2012
@@ -393,9 +393,22 @@
if (SourceString)
{
- ReturnString = ExAllocatePool(PagedPool, SourceString->Length);
- RtlCopyMemory(ReturnString, SourceString->Buffer, SourceString->Length);
- DPRINT1("%S\n", ReturnString);
+ //
+ // allocate buffer
+ //
+ ReturnString = ExAllocatePool(PagedPool, SourceString->MaximumLength);
+ if (!ReturnString)
+ {
+ //
+ // no memory
+ //
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ //
+ // copy buffer
+ //
+ RtlCopyMemory(ReturnString, SourceString->Buffer,
SourceString->MaximumLength);
}
*Information = (ULONG_PTR)ReturnString;
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