Fix sloppy mode arguments uninitialized value use

MemorySanitizer complained about uninitialized reads in the indexed property code path in JS_GetPropertyValue() with JS_CLASS_MAPPED_ARGUMENTS objects.
bnoordhuis · Nov 1, 2023 · f8b3a2e · f8b3a2e
1 parent 67585d0
commit f8b3a2e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/quickjs.c b/quickjs.c
@@ -15005,6 +15005,8 @@ static JSValue js_build_mapped_arguments(JSContext *ctx, int argc,
     if (JS_IsException(val))
         return val;
     p = JS_VALUE_GET_OBJ(val);
+    p->u.array.u.values = NULL;
+    p->u.array.count = 0;
 
     /* add the length field (cannot fail) */
     pr = add_property(ctx, p, JS_ATOM_length,