[PATCH 2/2] ntdll: Deny file operations on mapping handles.

[Jacek Caban]

Hi Paul,

On 01.05.2020 19:17, Paul Gofman wrote:
> diff --git a/server/fd.c b/server/fd.c
> index 39fb419f25..8e547f53dc 100644
> --- a/server/fd.c
> +++ b/server/fd.c
> @@ -2612,6 +2612,12 @@ DECL_HANDLER(read)
>   
>       if (!fd) return;
>   
> +    if (fd->fd_ops->get_fd_type( fd ) == FD_TYPE_MAPPING)
> +    {
> +        set_error( STATUS_INVALID_HANDLE );
> +        return;
> +    }


This should be probably changed in no_fd_read or, if mapping is for some 
reason different than other objects, introducing a separated read() for 
mapping objects.


Thanks,

Jacek