ASP.NET MVC Problemas para puxar lista de outra model

<div class="form-group">
@Html.LabelFor(model => model.CategoriaId, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.Categoria, new SelectList(Model.Categoria.Nome), "Sem categoria", new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.Categoria.Nome, "", new { @class = "text-danger" })
</div>
</div>





System.NullReferenceException
HResult=0x80004003
Message=Referência de objeto não definida para uma instância de um objeto.
Source=App_Web_iikt0c0u
StackTrace:
em ASP._Page_Views_CadastroFornecedor_Create_cshtml.Execute() em C:\\Users\\Anatole\\Desktop\\Projeto\\ProjetoWebCadastro\\ProjetoWebCadastro\\Views\\CadastroFornecedor\\Create.cshtml:linha 99
em System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
em System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
em System.Web.WebPages.StartPage.RunPage()
em System.Web.WebPages.StartPage.ExecutePageHierarchy()
em System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
em System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
em System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
em System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
em System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
em System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
em System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)