[Minor] Pdf: Add some sanity check

rspamd · Jun 5, 2020 · 1a5d3a2 · 1a5d3a2
1 parent a0abf27
commit 1a5d3a2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lualib/lua_content/pdf.lua b/lualib/lua_content/pdf.lua
@@ -426,7 +426,7 @@ local function maybe_extract_object_stream(obj, pdf, task)
     return nil
   end
   local dict = obj.dict
-  if dict.Length then
+  if dict.Length and type(obj.stream) == 'table' then
     local len = math.min(obj.stream.len,
         tonumber(maybe_dereference_object(dict.Length, pdf, task)) or 0)
     local real_stream = obj.stream.data:span(1, len)