1 files changed, 7 insertions, 0 deletions
diff --git a/src/wasm-interpreter.h b/src/wasm-interpreter.h
index 9118eaae1..1c8377127 100644
--- a/src/wasm-interpreter.h
+++ b/src/wasm-interpreter.h
@@ -1617,6 +1617,13 @@ public:
     }
     const auto& element = curr->rtt->type.getHeapType().getArray().element;
     Index num = size.getSingleValue().geti32();
+    // Arbitrary deterministic limit on size. If we need to allocate a Literals
+    // vector that takes around 1-2GB of memory then we are likely to hit memory
+    // limits on 32-bit machines, and in particular on wasm32 VMs that do not
+    // have 4GB support, so give up there.
+    if (num >= (1 << 30) / sizeof(Literal)) {
+      trap("allocation failure");
+    }
     Literals data(num);
     if (curr->isWithDefault()) {
       for (Index i = 0; i < num; i++) {