src: check for empty maybe local

Using ToLocalChecked on MaybeLocal without verifying it's empty can lead to unattempted crash. PR-URL: #32339 Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · Mar 30, 2020 · aa28227 · aa28227
1 parent 13377a0
commit aa28227
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/udp_wrap.cc b/src/udp_wrap.cc
@@ -516,7 +516,8 @@ void UDPWrap::DoSend(const FunctionCallbackInfo<Value>& args, int family) {
 
   // construct uv_buf_t array
   for (size_t i = 0; i < count; i++) {
-    Local<Value> chunk = chunks->Get(env->context(), i).ToLocalChecked();
+    Local<Value> chunk;
+    if (!chunks->Get(env->context(), i).ToLocal(&chunk)) return;
 
     size_t length = Buffer::Length(chunk);