stream: validate undefined sizeAlgorithm in WritableStream

PR-URL: #56067
Fixes: #56014
Refs: whatwg/streams#1333
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Jake Yuesong Li <[email protected]>

Author: jazelly

lib/internal/webstreams/writablestream.js

@@ -1167,9 +1167,18 @@ function writableStreamDefaultControllerGetDesiredSize(controller) {
 }
 
 function writableStreamDefaultControllerGetChunkSize(controller, chunk) {
+  const {
+    stream,
+    sizeAlgorithm,
+  } = controller[kState];
+  if (sizeAlgorithm === undefined) {
+    assert(stream[kState].state === 'errored' || stream[kState].state === 'erroring');
+    return 1;
+  }
+
   try {
     return FunctionPrototypeCall(
-      controller[kState].sizeAlgorithm,
+      sizeAlgorithm,
       undefined,
       chunk);
   } catch (error) {