[wasm] Set externally passed memory non neuterable

src/wasm/wasm-module.cc

Index: src/wasm/wasm-module.cc
diff --git a/src/wasm/wasm-module.cc b/src/wasm/wasm-module.cc
index b37d93c828118fd0f0d031d540537b6327476bb1..9d5f4d00ce4713626d25f280219bdbb385f8a824 100644
--- a/src/wasm/wasm-module.cc
+++ b/src/wasm/wasm-module.cc
@@ -990,7 +990,10 @@ class WasmInstanceBuilder {
     isolate_->counters()->wasm_min_mem_pages_count()->AddSample(min_mem_pages);
     // TODO(wasm): re-enable counter for max_mem_pages when we use that field.
 
-    if (memory_.is_null() && min_mem_pages > 0) {
+    if (!memory_.is_null()) {
+      // Set externally passed ArrayBuffer non neuterable.
+      memory_->set_is_neuterable(false);
+    } else if (min_mem_pages > 0) {
       memory_ = AllocateMemory(min_mem_pages);
       if (memory_.is_null()) return nothing;  // failed to allocate memory
     }