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Input parameter in FSCTL_GET_RETRIEVAL_POINTERS is really a STARTING_VCN_INPUT_BUFFER structure (even if it contains only a LARGE_INTEGER)

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svn path=/trunk/; revision=17319
This commit is contained in:
Hervé Poussineau 2005-08-11 21:29:37 +00:00
parent 733f1ba80d
commit 0c6db72406
1 changed files with 2 additions and 2 deletions
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4
reactos/drivers/fs/vfat/fsctl.c
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@ -704,7 +704,7 @@ VfatGetRetrievalPointers(PVFAT_IRP_CONTEXT IrpContext)
DeviceExt = IrpContext->DeviceExt; DeviceExt = IrpContext->DeviceExt;
FileObject = IrpContext->FileObject; FileObject = IrpContext->FileObject;
Stack = IrpContext->Stack; Stack = IrpContext->Stack;
if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(LARGE_INTEGER) || if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(STARTING_VCN_INPUT_BUFFER) ||
Stack->Parameters.DeviceIoControl.Type3InputBuffer == NULL) Stack->Parameters.DeviceIoControl.Type3InputBuffer == NULL)
{ {
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;
@ -719,7 +719,7 @@ VfatGetRetrievalPointers(PVFAT_IRP_CONTEXT IrpContext)
ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE); ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE);
Vcn = *(PLARGE_INTEGER)Stack->Parameters.DeviceIoControl.Type3InputBuffer; Vcn = ((PSTARTING_VCN_INPUT_BUFFER)Stack->Parameters.DeviceIoControl.Type3InputBuffer)->StartingVcn;
RetrievalPointers = IrpContext->Irp->UserBuffer; RetrievalPointers = IrpContext->Irp->UserBuffer;
MaxExtentCount = ((Stack->Parameters.DeviceIoControl.OutputBufferLength - sizeof(RetrievalPointers->ExtentCount) - sizeof(RetrievalPointers->StartingVcn)) / sizeof(RetrievalPointers->Extents[0])); MaxExtentCount = ((Stack->Parameters.DeviceIoControl.OutputBufferLength - sizeof(RetrievalPointers->ExtentCount) - sizeof(RetrievalPointers->StartingVcn)) / sizeof(RetrievalPointers->Extents[0]));