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[NDIS] NdisOpenFile: read file contents into buffer when opening it

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NdisMapFile now returns a non-null buffer.

CORE-20259
This commit is contained in:
Hervé Poussineau 2025-06-28 13:44:55 +02:00
parent d72bcb149f
commit e2904d3baf
1 changed files with 29 additions and 0 deletions
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29
drivers/network/ndis/ndis/misc.c
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@ -207,6 +207,8 @@ NdisCloseFile(
if ( FileHandleObject->Mapped ) if ( FileHandleObject->Mapped )
NdisUnmapFile ( FileHandle ); NdisUnmapFile ( FileHandle );
if ( FileHandleObject->MapBuffer )
ExFreePool ( FileHandleObject->MapBuffer );
ZwClose ( FileHandleObject->FileHandle ); ZwClose ( FileHandleObject->FileHandle );
@ -321,6 +323,31 @@ NdisOpenFile(
} }
NtFileLength = StandardInfo.EndOfFile.LowPart; NtFileLength = StandardInfo.EndOfFile.LowPart;
FileHandleObject->MapBuffer = ExAllocatePool( NonPagedPool, NtFileLength );
if (!FileHandleObject->MapBuffer)
{
NDIS_DbgPrint(MIN_TRACE, ("ExAllocatePool failed Name %wZ\n", FileName));
*Status = NDIS_STATUS_ERROR_READING_FILE;
goto cleanup;
}
NtStatus = ZwReadFile(
NtFileHandle,
NULL,
NULL,
NULL,
&IoStatusBlock,
FileHandleObject->MapBuffer,
NtFileLength,
NULL,
NULL);
if ( !NT_SUCCESS(NtStatus) || IoStatusBlock.Information != NtFileLength )
{
NDIS_DbgPrint(MIN_TRACE, ("ZwReadFile failed (%x) Name %wZ\n", NtStatus, FileName));
*Status = NDIS_STATUS_ERROR_READING_FILE;
goto cleanup;
}
cleanup: cleanup:
if ( FullFileName.Buffer != NULL ) if ( FullFileName.Buffer != NULL )
{ {
@ -331,6 +358,8 @@ cleanup:
{ {
if ( FileHandleObject ) if ( FileHandleObject )
{ {
if ( FileHandleObject->MapBuffer )
ExFreePool( FileHandleObject->MapBuffer );
ExFreePool ( FileHandleObject ); ExFreePool ( FileHandleObject );
} }
*FileHandle = NULL; *FileHandle = NULL;