buffer,n-api: fix double ArrayBuffer::Detach() during cleanup

These calls could fail if the `ArrayBuffer` had already been explicitly detached at some point in the past. The necessary test changes already came with 4f523c2 and could be ported back to v12.x with a backport of this PR. Fixes: #33022 Refs: #30551 PR-URL: #33039 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: Gerhard Stöbich <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Juan José Arboleda <[email protected]>
nodejs · Apr 28, 2020 · 1af08e1 · 1af08e1
1 parent 31c797c
commit 1af08e1
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Showing 2 changed files with 8 additions and 5 deletions.
diff --git a/src/js_native_api_v8.cc b/src/js_native_api_v8.cc
@@ -392,10 +392,12 @@ class ArrayBufferReference final : public Reference {
   inline void Finalize(bool is_env_teardown) override {
     if (is_env_teardown) {
       v8::HandleScope handle_scope(_env->isolate);
-      v8::Local<v8::Value> ab = Get();
-      CHECK(!ab.IsEmpty());
-      CHECK(ab->IsArrayBuffer());
-      ab.As<v8::ArrayBuffer>()->Detach();
+      v8::Local<v8::Value> obj = Get();
+      CHECK(!obj.IsEmpty());
+      CHECK(obj->IsArrayBuffer());
+      v8::Local<v8::ArrayBuffer> ab = obj.As<v8::ArrayBuffer>();
+      if (ab->IsDetachable())
+        ab->Detach();
     }
 
     Reference::Finalize(is_env_teardown);

diff --git a/src/node_buffer.cc b/src/node_buffer.cc
@@ -152,7 +152,8 @@ void CallbackInfo::CleanupHook(void* data) {
     HandleScope handle_scope(self->env_->isolate());
     Local<ArrayBuffer> ab = self->persistent_.Get(self->env_->isolate());
     CHECK(!ab.IsEmpty());
-    ab->Detach();
+    if (ab->IsDetachable())
+      ab->Detach();
   }
 
   self->WeakCallback(self->env_->isolate());