Return only labels that user have access on IssuableFinder#labels

app/finders/issuable_finder.rb

@@ -124,14 +124,11 @@ class IssuableFinder
   def labels
     return @labels if defined?(@labels)
+    @labels =
       if labels? && !filter_by_no_label?
-      @labels = Label.where(title: label_names)
-
-      if projects
-        @labels = LabelsFinder.new(current_user, project_ids: projects, title: label_names).execute
-      end
+        LabelsFinder.new(current_user, project_ids: projects, title: label_names).execute
       else
-      @labels = Label.none
+        Label.none
       end
   end

app/finders/labels_finder.rb

@@ -45,7 +45,7 @@ class LabelsFinder < UnionFinder
     params[:project_id].presence
   end
-  def project_ids
+  def projects_ids
     params[:project_ids].presence
   end
@@ -70,7 +70,7 @@ class LabelsFinder < UnionFinder
     @projects = available_projects
     @projects = @projects.in_namespace(group_id) if group_id
-    @projects = @projects.where(id: project_ids) if project_ids
+    @projects = @projects.where(id: projects_ids) if projects_ids
     @projects = @projects.reorder(nil)
     @projects