/*
* TsmiHandleMemWrite
*
* Purpose:
*
* Patch vbox dll in memory.
*
* Warning: potential BSOD-generator due to nonstandard way of loading, take care with patch offsets.
*
*/
NTSTATUS TsmiHandleMemWrite(
_In_ PVOID SrcAddress,
_In_ PVOID DestAddress,
_In_ ULONG Size
)
{
PMDL mdl;
NTSTATUS status = STATUS_SUCCESS;
PAGED_CODE();
mdl = IoAllocateMdl(DestAddress, Size, FALSE, FALSE, NULL);
if (mdl == NULL) {
return STATUS_INSUFFICIENT_RESOURCES;
}
if (DestAddress >= MmSystemRangeStart)
if (!MmIsAddressValid(DestAddress)) {
return STATUS_ACCESS_VIOLATION;
}
MmProbeAndLockPages(mdl, KernelMode, IoReadAccess);
DestAddress = MmGetSystemAddressForMdlSafe(mdl, HighPagePriority);
if (DestAddress != NULL) {
status = MmProtectMdlSystemAddress(mdl, PAGE_EXECUTE_READWRITE);
__movsb((PUCHAR)DestAddress, (const UCHAR *)SrcAddress, Size);
MmUnmapLockedPages(DestAddress, mdl);
MmUnlockPages(mdl);
}
else {
status = STATUS_ACCESS_VIOLATION;
}
IoFreeMdl(mdl);
return status;
}
VOID DispTdiQueryInformationExComplete(
PVOID Context,
ULONG Status,
UINT ByteCount)
/*
* FUNCTION: Completes a TDI QueryInformationEx request
* ARGUMENTS:
* Context = Pointer to the IRP for the request
* Status = TDI status of the request
* ByteCount = Number of bytes returned in output buffer
*/
{
PTI_QUERY_CONTEXT QueryContext;
QueryContext = (PTI_QUERY_CONTEXT)Context;
if (NT_SUCCESS(Status)) {
CopyBufferToBufferChain(
QueryContext->InputMdl,
FIELD_OFFSET(TCP_REQUEST_QUERY_INFORMATION_EX, Context),
(PCHAR)&QueryContext->QueryInfo.Context,
CONTEXT_SIZE);
}
MmUnlockPages(QueryContext->InputMdl);
IoFreeMdl(QueryContext->InputMdl);
if( QueryContext->OutputMdl ) {
MmUnlockPages(QueryContext->OutputMdl);
IoFreeMdl(QueryContext->OutputMdl);
}
QueryContext->Irp->IoStatus.Information = ByteCount;
QueryContext->Irp->IoStatus.Status = Status;
ExFreePoolWithTag(QueryContext, QUERY_CONTEXT_TAG);
}
VOID
LlcTerminate(
VOID
)
/*++
Routine Description:
The routines terminates the LLC protocol module and frees its global
resources. This assumes all adapter bindings to be closed.
Arguments:
None.
Return Value:
None.
--*/
{
NDIS_STATUS Status;
ASSUME_IRQL(PASSIVE_LEVEL);
LlcTerminateTimerSystem();
NdisDeregisterProtocol(&Status, LlcProtocolHandle);
IoFreeMdl(pXidMdl);
}
VOID
NTAPI
CcMdlReadComplete(IN PFILE_OBJECT FileObject,
IN PMDL MdlChain)
{
IoFreeMdl(MdlChain);
}
VOID
NTAPI
CdRomDeAllocateMmcResources(
IN PDEVICE_OBJECT Fdo
)
{
PCOMMON_DEVICE_EXTENSION commonExtension = Fdo->DeviceExtension;
PCDROM_DATA cddata = commonExtension->DriverData;
PCDROM_MMC_EXTENSION mmcData = &cddata->Mmc;
//NTSTATUS status;
if (mmcData->CapabilitiesWorkItem) {
IoFreeWorkItem(mmcData->CapabilitiesWorkItem);
mmcData->CapabilitiesWorkItem = NULL;
}
if (mmcData->CapabilitiesIrp) {
IoFreeIrp(mmcData->CapabilitiesIrp);
mmcData->CapabilitiesIrp = NULL;
}
if (mmcData->CapabilitiesMdl) {
IoFreeMdl(mmcData->CapabilitiesMdl);
mmcData->CapabilitiesMdl = NULL;
}
if (mmcData->CapabilitiesBuffer) {
ExFreePool(mmcData->CapabilitiesBuffer);
mmcData->CapabilitiesBuffer = NULL;
}
mmcData->CapabilitiesBuffer = 0;
mmcData->IsMmc = FALSE;
mmcData->WriteAllowed = FALSE;
return;
}
/*
* DestroyTransferPacket
*
*/
VOID DestroyTransferPacket(PTRANSFER_PACKET Pkt)
{
PFUNCTIONAL_DEVICE_EXTENSION fdoExt = Pkt->Fdo->DeviceExtension;
PCLASS_PRIVATE_FDO_DATA fdoData = fdoExt->PrivateFdoData;
KIRQL oldIrql;
ASSERT(!Pkt->SlistEntry.Next);
// ASSERT(!Pkt->OriginalIrp);
KeAcquireSpinLock(&fdoData->SpinLock, &oldIrql);
/*
* Delete the packet from our all-packets queue.
*/
ASSERT(!IsListEmpty(&Pkt->AllPktsListEntry));
ASSERT(!IsListEmpty(&fdoData->AllTransferPacketsList));
RemoveEntryList(&Pkt->AllPktsListEntry);
InitializeListHead(&Pkt->AllPktsListEntry);
KeReleaseSpinLock(&fdoData->SpinLock, oldIrql);
IoFreeMdl(Pkt->PartialMdl);
IoFreeIrp(Pkt->Irp);
FREE_POOL(Pkt->RetryHistory);
FREE_POOL(Pkt);
}
NTSTATUS
IoCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
UNREFERENCED_PARAMETER(DeviceObject);
UNREFERENCED_PARAMETER(Context);
PAGED_CODE();
KdPrint(("SYS(%d:%d):IoCompletionRoutine!\n", PsGetCurrentProcessId(), PsGetCurrentThreadId()));
*Irp->UserIosb = Irp->IoStatus;
if (Irp->UserEvent)
KeSetEvent(Irp->UserEvent, IO_NO_INCREMENT, 0);
if (Irp->MdlAddress)
{
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
}
IoFreeIrp(Irp);
return STATUS_MORE_PROCESSING_REQUIRED;
}
NTSTATUS
IoCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
//DbgPrint(("IoCompletionRoutine!\n"));
*Irp->UserIosb = Irp->IoStatus;
if (Irp->MdlAddress)
{
//MmUnmapLockedPages( Irp->MdlAddress,
// MmGetSystemAddressForMdlSafe( Irp->MdlAddress, NormalPagePriority ) );
MmUnlockPages( Irp->MdlAddress );
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
}
if (Irp->UserEvent)
KeSetEvent(Irp->UserEvent, IO_NO_INCREMENT, 0);
IoFreeIrp(Irp);
return STATUS_MORE_PROCESSING_REQUIRED;
//return STATUS_SUCCESS;
}
static NTSTATUS
redirect_irp_completion(PDEVICE_OBJECT dev_obj, PIRP irp, PVOID ctxt)
{
IO_STACK_LOCATION *const isl = IoGetCurrentIrpStackLocation(irp);
struct scsifilt *const sf = get_scsifilt(dev_obj);
SCSI_REQUEST_BLOCK *const new_srb = isl->Parameters.Scsi.Srb;
SCSI_REQUEST_BLOCK *const srb = new_srb->OriginalRequest;
MDL *const mdl = irp->MdlAddress;
void *const buf = new_srb->DataBuffer;
UNREFERENCED_PARAMETER(ctxt);
srb->SrbStatus = new_srb->SrbStatus;
srb->ScsiStatus = new_srb->ScsiStatus;
memcpy(srb->DataBuffer, buf, srb->DataTransferLength);
IoFreeIrp(irp);
IoFreeMdl(mdl);
ExFreePool(buf);
XmFreeMemory(new_srb);
queue_srb_for_completion(sf, srb);
return STATUS_MORE_PROCESSING_REQUIRED;
}
/// <summary>
/// Unmap memory region, release corresponding MDL, and remove region form list
/// </summary>
/// <param name="pPageEntry">Region data</param>
/// <param name="pFoundEntry">Process data</param>
/// <returns>Status code</returns>
NTSTATUS BBUnmapRegionEntry( IN PMAP_ENTRY pPageEntry, IN PPROCESS_MAP_ENTRY pFoundEntry )
{
NTSTATUS status = STATUS_SUCCESS;
UNREFERENCED_PARAMETER( pFoundEntry );
// MDL is valid
if (pPageEntry->pMdl)
{
// If MDL is mapped
if (pPageEntry->newPtr)
{
DPRINT( "BlackBone: %s: Unmapping region at 0x%p from process %u\n", __FUNCTION__, pPageEntry->newPtr, pFoundEntry->target.pid );
MmUnmapLockedPages( (PVOID)pPageEntry->newPtr, pPageEntry->pMdl );
pPageEntry->newPtr = 0;
}
if (pPageEntry->locked)
MmUnlockPages( pPageEntry->pMdl );
IoFreeMdl( pPageEntry->pMdl );
}
RemoveEntryList( &pPageEntry->link );
ExFreePoolWithTag( pPageEntry, BB_POOL_TAG );
return status;
}
int hax_pin_user_pages(uint64 start_uva, uint64 size, hax_memdesc_user *memdesc)
{
PMDL pmdl = NULL;
if (!memdesc) {
hax_error("%s: memdesc == NULL\n", __func__);
return -EINVAL;
}
// TODO: Check whether [start_uva, start_uva + size) is a valid UVA range
pmdl = IoAllocateMdl((PVOID)start_uva, size, FALSE, FALSE, NULL);
if (!pmdl) {
hax_error("Failed to allocate MDL for va: 0x%llx, size: 0x%llx.\n",
start_uva, size);
return -EFAULT;
}
try {
MmProbeAndLockPages(pmdl, UserMode, IoWriteAccess);
} except (EXCEPTION_EXECUTE_HANDLER) {
hax_error("Failed to probe pages for guest's memory! va: 0x%llx\n",
start_uva);
IoFreeMdl(pmdl);
return -ENOMEM;
}
memdesc->pmdl = pmdl;
return 0;
}
void
StreamEditEvtDriverUnload(
_In_ WDFDRIVER driverObject
)
{
UNREFERENCED_PARAMETER(driverObject);
if (!configEditInline)
{
OobEditShutdown(&gStreamEditor);
}
if (gStreamEditor.scratchBuffer != NULL)
{
ExFreePoolWithTag(
gStreamEditor.scratchBuffer,
STREAM_EDITOR_FLAT_BUFFER_TAG
);
}
StreamEditUnregisterCallout();
FwpsInjectionHandleDestroy(gInjectionHandle);
NdisFreeNetBufferListPool(gNetBufferListPool);
NdisFreeGenericObject(gNdisGenericObj);
IoFreeMdl(gStringToReplaceMdl);
}
NTSTATUS
Ext2LockUserBuffer (IN PIRP Irp,
IN ULONG Length,
IN LOCK_OPERATION Operation)
{
NTSTATUS Status;
ASSERT(Irp != NULL);
if (Irp->MdlAddress != NULL) {
return STATUS_SUCCESS;
}
IoAllocateMdl(Irp->UserBuffer, Length, FALSE, FALSE, Irp);
if (Irp->MdlAddress == NULL) {
return STATUS_INSUFFICIENT_RESOURCES;
}
__try {
MmProbeAndLockPages(Irp->MdlAddress, Irp->RequestorMode, Operation);
Status = STATUS_SUCCESS;
} __except (EXCEPTION_EXECUTE_HANDLER) {
DbgBreak();
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
Status = STATUS_INVALID_USER_BUFFER;
}
return Status;
}
NTSTATUS createcomplete(PDEVICE_OBJECT dev, PIRP irp, PVOID context)
{
UNREFERENCED_PARAMETER(dev);
UNREFERENCED_PARAMETER(irp);
UNREFERENCED_PARAMETER(context);
DbgPrint("enter createcomplete\n");
PIO_STACK_LOCATION sa = IoGetCurrentIrpStackLocation(irp);
PCONTEXTI info = context;
DbgPrint("1\n");
TDI_ADDRESS_INFO *tai = ExAllocatePool(NonPagedPool, sizeof(TDI_ADDRESS_INFO));
DbgPrint("2\n");
PMDL mdl = IoAllocateMdl(tai, sizeof(TDI_ADDRESS_INFO), FALSE, FALSE, info->query_irp);
MmBuildMdlForNonPagedPool(mdl);
info->mdl = mdl;
DbgPrint("3\n");
IoCopyCurrentIrpStackLocationToNext(irp);
TdiBuildQueryInformation(info->query_irp, info->realdev, sa->FileObject, querycom, info, TDI_QUERY_ADDRESS_INFO, mdl);
DbgPrint("4\n");
if (irp->PendingReturned)
{
IoMarkIrpPending(irp);
DbgPrint("pending\n");
}
IoCallDriver(info->realdev, info->query_irp);
DbgPrint("6\n");
IoFreeMdl(info->mdl);
ExFreePool(context);
return STATUS_SUCCESS;
}
PMDL
Ext2CreateMdl (
IN PVOID Buffer,
IN BOOLEAN bPaged,
IN ULONG Length,
IN LOCK_OPERATION Operation
)
{
NTSTATUS Status;
PMDL Mdl = NULL;
ASSERT (Buffer != NULL);
Mdl = IoAllocateMdl (Buffer, Length, FALSE, FALSE, NULL);
if (Mdl == NULL) {
Status = STATUS_INSUFFICIENT_RESOURCES;
} else {
__try {
if (bPaged) {
MmProbeAndLockPages(Mdl, KernelMode, Operation);
} else {
MmBuildMdlForNonPagedPool (Mdl);
}
Status = STATUS_SUCCESS;
} __except (EXCEPTION_EXECUTE_HANDLER) {
IoFreeMdl (Mdl);
Mdl = NULL;
DbgBreak();
Status = STATUS_INVALID_USER_BUFFER;
}
}
return Mdl;
}
NTSTATUS
LpxTdiSendDataGramCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
UNREFERENCED_PARAMETER(DeviceObject);
UNREFERENCED_PARAMETER(Context);
if(Irp->MdlAddress != NULL) {
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
} else {
LtDebugPrint(1, ("[LpxTdi] LpxTdiSendDataGramCompletionRoutine: Mdl is NULL!!!\n"));
}
if(Irp->UserIosb) {
*Irp->UserIosb = Irp->IoStatus;
}
return STATUS_SUCCESS;
}
void
UserMemoryManager::CleanupCurrentProcess()
{
PEPROCESS curProc = PsGetCurrentProcess();
mLMIList.PublicLock();
LockedMemInfo *pLMI = mLMIList.Head();
// Unlock memory for this process.
while (NULL!=(int)(pLMI))
{
LockedMemInfo *pNext = mLMIList.Next(pLMI);
if (pLMI->proc == curProc)
{
MmUnlockPages(pLMI->pMdl);
IoFreeMdl(pLMI->pMdl);
mLMIList.Remove(pLMI);
mLMIAllocator.Free(pLMI);
}
pLMI = pNext;
}
mLMIList.PublicUnlock();
}
VOID
NdisFreeBuffer(
IN PNDIS_BUFFER Buffer
)
{
IoFreeMdl(Buffer);
}
NTSTATUS
LpxTdiRecvWithCompletionEventCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PTDI_RECEIVE_CONTEXT TdiReceiveContext
)
{
UNREFERENCED_PARAMETER(DeviceObject);
if(Irp->MdlAddress != NULL) {
// MmUnlockPages(Irp->MdlAddress);
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
} else {
LtDebugPrint(1, ("[LpxTdi]KSCompletionRoutine: Mdl is NULL!!!\n"));
}
TdiReceiveContext->Result = Irp->IoStatus.Information;
if(Irp->IoStatus.Status != STATUS_SUCCESS)
TdiReceiveContext->Result = -1;
KeSetEvent(&TdiReceiveContext->CompletionEvent, IO_NETWORK_INCREMENT, FALSE);
TdiReceiveContext->Irp = NULL;
return STATUS_SUCCESS;
}
static
PVOID
MapAndLockUserBuffer(
_In_ _Out_ PIRP Irp,
_In_ ULONG BufferLength)
{
PMDL Mdl;
if (Irp->MdlAddress == NULL)
{
Mdl = IoAllocateMdl(Irp->UserBuffer, BufferLength, FALSE, FALSE, Irp);
if (Mdl == NULL)
{
return NULL;
}
_SEH2_TRY
{
MmProbeAndLockPages(Mdl, Irp->RequestorMode, IoWriteAccess);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
IoFreeMdl(Mdl);
Irp->MdlAddress = NULL;
_SEH2_YIELD(return NULL);
}
_SEH2_END;
}
NTSTATUS
InitWskBuffer(
__in PVOID Buffer,
__in ULONG BufferSize,
__out PWSK_BUF WskBuffer
)
{
NTSTATUS Status = STATUS_SUCCESS;
ASSERT(Buffer);
ASSERT(BufferSize);
ASSERT(WskBuffer);
WskBuffer->Offset = 0;
WskBuffer->Length = BufferSize;
WskBuffer->Mdl = IoAllocateMdl(Buffer, BufferSize, FALSE, FALSE, NULL);
if (!WskBuffer->Mdl) {
return STATUS_INSUFFICIENT_RESOURCES;
}
try {
MmProbeAndLockPages(WskBuffer->Mdl, KernelMode, IoWriteAccess);
} except(EXCEPTION_EXECUTE_HANDLER) {
if (WskBuffer->Mdl != NULL) {
IoFreeMdl(WskBuffer->Mdl);
}
WDRBD_ERROR("MmProbeAndLockPages failed. exception code=0x%x\n", GetExceptionCode());
return STATUS_INSUFFICIENT_RESOURCES;
}
return Status;
}
void
NTAPI
StreamOobInjectCompletionFn(
_Inout_ void* context,
_Inout_ NET_BUFFER_LIST* netBufferList,
BOOLEAN dispatchLevel
)
/* ++
Injection completion function for injecting an NBL created using
FwpsAllocateNetBufferAndNetBufferList. This function frees up
resources allocated during StreamOobReinjectData().
-- */
{
MDL* mdl = (MDL*)context;
UNREFERENCED_PARAMETER(dispatchLevel);
FwpsFreeNetBufferList(netBufferList);
if (mdl != NULL)
{
IoFreeMdl(mdl);
//
// The MDL mapped over a pool alloc which we need to free here.
//
ExFreePoolWithTag(
mdl->MappedSystemVa,
STREAM_EDITOR_MDL_DATA_TAG
);
}
}
NTSTATUS
LpxTdiSendCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
UNREFERENCED_PARAMETER(DeviceObject);
UNREFERENCED_PARAMETER(Context);
if(Irp->MdlAddress != NULL) {
// MmUnlockPages(Irp->MdlAddress);
// ExFreePool(MmGetMdlVirtualAddress(Irp->MdlAddress));
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
} else {
LtDebugPrint(1, ("[LpxTdi]LpxTdiSendCompletionRoutine: Mdl is NULL!!!\n"));
}
if((LONG)Irp->Tail.Overlay.DriverContext[2] > 0)
{
LtDebugPrint(3, ("[LpxTdi]LpxTdiSendCompletionRoutine: (LONG)Irp->Tail.Overlay.DriverContext[2] = %d. %p %p!!!\n",
(LONG)Irp->Tail.Overlay.DriverContext[2], DeviceObject, Context));
// retransmits occurred
if(Context && TDI_FAKE_CONTEXT != Context)
{
PTDI_SEND_RESULT SendResult = (PTDI_SEND_RESULT)Context;
SendResult->Retransmits = (LONG)Irp->Tail.Overlay.DriverContext[2];
}
}
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
MiSimpleReadComplete(PDEVICE_OBJECT DeviceObject,
PIRP Irp,
PVOID Context)
{
PMDL Mdl = Irp->MdlAddress;
/* Unlock MDL Pages, page 167. */
DPRINT("MiSimpleReadComplete %p\n", Irp);
while (Mdl)
{
DPRINT("MDL Unlock %p\n", Mdl);
MmUnlockPages(Mdl);
Mdl = Mdl->Next;
}
/* Check if there's an MDL */
while ((Mdl = Irp->MdlAddress))
{
/* Clear all of them */
Irp->MdlAddress = Mdl->Next;
IoFreeMdl(Mdl);
}
return STATUS_SUCCESS;
}
NTSTATUS
Ext2ReadWriteBlockSyncCompletionRoutine (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context )
{
PEXT2_RW_CONTEXT pContext = (PEXT2_RW_CONTEXT)Context;
if (Irp != pContext->MasterIrp) {
if (!NT_SUCCESS(Irp->IoStatus.Status)) {
pContext->MasterIrp->IoStatus = Irp->IoStatus;
}
IoFreeMdl(Irp->MdlAddress);
IoFreeIrp(Irp );
}
if (InterlockedDecrement(&pContext->Blocks) == 0) {
pContext->MasterIrp->IoStatus.Information = 0;
if (NT_SUCCESS(pContext->MasterIrp->IoStatus.Status)) {
pContext->MasterIrp->IoStatus.Information =
pContext->Length;
}
KeSetEvent(&pContext->Event, 0, FALSE);
}
return STATUS_MORE_PROCESSING_REQUIRED;
}
NTSTATUS tdi_recv_stream(PFILE_OBJECT connectionFileObject, char *buf, int len, ULONG flags)
{
PDEVICE_OBJECT devObj;
KEVENT event;
PIRP irp;
PMDL mdl;
IO_STATUS_BLOCK iosb;
NTSTATUS status;
devObj = IoGetRelatedDeviceObject(connectionFileObject);
KeInitializeEvent(&event, NotificationEvent, FALSE);
irp = TdiBuildInternalDeviceControlIrp(TDI_RECEIVE, devObj, connectionFileObject, &event, &iosb);
if (irp == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
if (len)
{
mdl = IoAllocateMdl((void*) buf, len, FALSE, FALSE, NULL);
if (mdl == NULL)
{
IoFreeIrp(irp);
return STATUS_INSUFFICIENT_RESOURCES;
}
__try
{
MmProbeAndLockPages(mdl, KernelMode, IoWriteAccess);
status = STATUS_SUCCESS;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
IoFreeMdl(mdl);
IoFreeIrp(irp);
status = STATUS_INVALID_USER_BUFFER;
}
if (!NT_SUCCESS(status))
{
return status;
}
}
TdiBuildReceive(irp, devObj, connectionFileObject, NULL, NULL, len ? mdl : 0, flags, len);
status = IoCallDriver(devObj, irp);
if (status == STATUS_PENDING)
{
KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
status = iosb.Status;
}
return NT_SUCCESS(status) ? iosb.Information : status;
}
VOID
NTAPI
FatDestroyIrpContext(PFAT_IRP_CONTEXT IrpContext)
{
PAGED_CODE();
/* Make sure it has no pinned stuff */
ASSERT(IrpContext->PinCount == 0);
/* If there is a FatIo context associated with it - free it */
if (IrpContext->FatIoContext)
{
if (!(IrpContext->Flags & IRPCONTEXT_STACK_IO_CONTEXT))
{
/* If a zero mdl was allocated - free it */
if (IrpContext->FatIoContext->ZeroMdl)
IoFreeMdl(IrpContext->FatIoContext->ZeroMdl);
/* Free memory of FatIo context */
ExFreePool(IrpContext->FatIoContext);
}
}
/* Free memory */
ExFreeToNPagedLookasideList(&FatGlobalData.IrpContextList, IrpContext);
}
NTSTATUS SafeCopyMemory(PVOID SrcAddr, PVOID DstAddr, ULONG Size)
{
PMDL pSrcMdl, pDstMdl;
PUCHAR pSrcAddress, pDstAddress;
NTSTATUS st = STATUS_UNSUCCESSFUL;
ULONG r;
BOOL bInit = FALSE;
pSrcMdl = IoAllocateMdl(SrcAddr, Size, FALSE, FALSE, NULL);
if (MmIsAddressValidEx(pSrcMdl))
{
MmBuildMdlForNonPagedPool(pSrcMdl);
pSrcAddress = (PUCHAR)MmGetSystemAddressForMdlSafe(pSrcMdl, NormalPagePriority);
if (MmIsAddressValidEx(pSrcAddress))
{
pDstMdl = IoAllocateMdl(DstAddr, Size, FALSE, FALSE, NULL);
if (MmIsAddressValidEx(pDstMdl))
{
__try
{
MmProbeAndLockPages(pDstMdl, KernelMode, IoWriteAccess);
pDstAddress = (PUCHAR)MmGetSystemAddressForMdlSafe(pDstMdl, NormalPagePriority);
if (MmIsAddressValidEx(pDstAddress))
{
RtlZeroMemory(pDstAddress,Size);
RtlCopyMemory(pDstAddress, pSrcAddress, Size);
st = STATUS_SUCCESS;
}
MmUnlockPages(pDstMdl);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
if (pDstMdl) MmUnlockPages(pDstMdl);
if (pDstMdl) IoFreeMdl(pDstMdl);
if (pSrcMdl) IoFreeMdl(pSrcMdl);
return GetExceptionCode();
}
IoFreeMdl(pDstMdl);
}
}
IoFreeMdl(pSrcMdl);
}
return st;
}
NTSTATUS
NTAPI
IoCompletion (
PDEVICE_OBJECT DeviceObject,
PIRP Irp,
PVOID Ctx)
{
PKSSTREAM_HEADER Header;
ULONG Length = 0;
PMDL Mdl, NextMdl;
PWDMAUD_COMPLETION_CONTEXT Context = (PWDMAUD_COMPLETION_CONTEXT)Ctx;
/* get stream header */
Header = (PKSSTREAM_HEADER)Irp->AssociatedIrp.SystemBuffer;
/* sanity check */
ASSERT(Header);
/* time to free all allocated mdls */
Mdl = Irp->MdlAddress;
while(Mdl)
{
/* get next mdl */
NextMdl = Mdl->Next;
/* unlock pages */
MmUnlockPages(Mdl);
/* grab next mdl */
Mdl = NextMdl;
}
/* clear mdl list */
Irp->MdlAddress = NULL;
/* check if mdl is locked */
if (Context->Mdl->MdlFlags & MDL_PAGES_LOCKED)
{
/* unlock pages */
MmUnlockPages(Context->Mdl);
}
/* now free the mdl */
IoFreeMdl(Context->Mdl);
DPRINT("IoCompletion Irp %p IoStatus %lx Information %lx Length %lu\n", Irp, Irp->IoStatus.Status, Irp->IoStatus.Information, Length);
if (!NT_SUCCESS(Irp->IoStatus.Status))
{
/* failed */
Irp->IoStatus.Information = 0;
}
/* free context */
FreeItem(Context);
return STATUS_SUCCESS;
}
VOID
NTAPI
CcMdlWriteAbort(IN PFILE_OBJECT FileObject,
IN PMDL MdlChain)
{
ASSERT(FALSE);
IoFreeMdl(MdlChain);
}
