properly error on invalid function import indexes ; fixes #1879

WebAssembly · Jan 20, 2019 · 2127e64 · 2127e64
1 parent 8e5f247
commit 2127e64
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
@@ -1505,6 +1505,9 @@ void WasmBinaryBuilder::processFunctions() {
     auto index = exportIndexes[curr];
     switch (curr->kind) {
       case ExternalKind::Function: {
+        if (index >= wasm.functions.size()) {
+          throwError("bad function export index");
+        }
         curr->value = getFunctionIndexName(index);
         break;
       }