From 21c6e4c257b438d9cb95d0b12dcb534210e8d9b1 Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Mon, 24 Oct 2022 03:19:20 +0330
Subject: [PATCH] LibWasm: Calculate the max data segment size correctly

This is given in pages, we need to first convert to bytes before
comparing with bytes.
---
 Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp b/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
index 49d8abc741..5c991e68f9 100644
--- a/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
+++ b/Userland/Libraries/LibWasm/AbstractMachine/AbstractMachine.cpp
@@ -345,7 +345,7 @@ InstantiationResult AbstractMachine::instantiate(Module const& module, Vector<Ex
                     auto address = main_module_instance.memories()[data.index.value()];
                     if (auto instance = m_store.get(address)) {
                         if (auto max = instance->type().limits().max(); max.has_value()) {
-                            if (*max < data.init.size() + offset) {
+                            if (*max * Constants::page_size < data.init.size() + offset) {
                                 instantiation_result = InstantiationError {
                                     String::formatted("Data segment attempted to write to out-of-bounds memory ({}) of max {} bytes",
                                         data.init.size() + offset, instance->type().limits().max().value())