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[NTOSKRNL] Allow FileNameInformation not to be implemented in storage stack

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This commit is contained in:
Pierre Schweitzer 2018-10-03 13:52:05 +02:00
parent 46bda8a4c6
commit 769157f6ff
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GPG key ID: 7545556C3D585B0B
1 changed files with 20 additions and 3 deletions
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23
ntoskrnl/io/iomgr/file.c
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@ -1981,9 +1981,26 @@ IopQueryNameInternal(IN PVOID ObjectBody,
}
if (NT_ERROR(Status))
{
/* Fail on errors only, allow warnings */
ExFreePoolWithTag(LocalInfo, TAG_IO);
return Status;
/* Allow status that would mean it's not implemented in the storage stack */
if (Status != STATUS_INVALID_PARAMETER && Status != STATUS_INVALID_DEVICE_REQUEST &&
Status != STATUS_NOT_IMPLEMENTED && Status != STATUS_INVALID_INFO_CLASS)
{
ExFreePoolWithTag(LocalInfo, TAG_IO);
return Status;
}
/* In such case, zero output */
LocalReturnLength = FIELD_OFFSET(FILE_NAME_INFORMATION, FileName);
LocalFileInfo->FileNameLength = 0;
LocalFileInfo->FileName[0] = OBJ_NAME_PATH_SEPARATOR;
}
else
{
/* We'll at least return the name length */
if (LocalReturnLength < FIELD_OFFSET(FILE_NAME_INFORMATION, FileName))
{
LocalReturnLength = FIELD_OFFSET(FILE_NAME_INFORMATION, FileName);
}
}
/* If the provided buffer is too small, return the required size */