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[NDIS] NdisOpenFile: retrieve and return file length in *FileLength

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CORE-20259
This commit is contained in:
Hervé Poussineau
2025-06-28 13:43:38 +02:00
parent 07f305cd59
commit d72bcb149f
1 changed files with 24 additions and 0 deletions
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24
drivers/network/ndis/ndis/misc.c
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@@ -233,6 +233,8 @@ NdisOpenFile(
OBJECT_ATTRIBUTES ObjectAttributes;
PNDIS_HANDLE_OBJECT FileHandleObject = NULL;
IO_STATUS_BLOCK IoStatusBlock;
FILE_STANDARD_INFORMATION StandardInfo;
UINT NtFileLength;
NTSTATUS NtStatus;
ASSERT_IRQL(PASSIVE_LEVEL);
@@ -296,8 +298,29 @@ NdisOpenFile(
{
NDIS_DbgPrint(MIN_TRACE, ("ZwCreateFile failed (%x) Name %wZ\n", NtStatus, FileName));
*Status = NDIS_STATUS_FILE_NOT_FOUND;
goto cleanup;
}
NtStatus = ZwQueryInformationFile(
NtFileHandle,
&IoStatusBlock,
&StandardInfo,
sizeof(StandardInfo),
FileStandardInformation);
if (!NT_SUCCESS(NtStatus))
{
NDIS_DbgPrint(MIN_TRACE, ("ZwQueryInformationFile failed (%x) Name %wZ\n", NtStatus, FileName));
*Status = NDIS_STATUS_ERROR_READING_FILE;
goto cleanup;
}
if (StandardInfo.EndOfFile.HighPart != 0 || StandardInfo.EndOfFile.LowPart == 0)
{
NDIS_DbgPrint(MIN_TRACE, ("ZwQueryInformationFile failed Name %wZ\n", FileName));
*Status = NDIS_STATUS_ERROR_READING_FILE;
goto cleanup;
}
NtFileLength = StandardInfo.EndOfFile.LowPart;
cleanup:
if ( FullFileName.Buffer != NULL )
{
@@ -316,6 +339,7 @@ cleanup:
{
FileHandleObject->FileHandle = NtFileHandle;
*FileHandle = NDIS_POBJECT_TO_HANDLE(FileHandleObject);
*FileLength = NtFileLength;
}
}