From 74d5edf5b00c376be9c3767cfeb8194ed8507209 Mon Sep 17 00:00:00 2001
From: pjh456 <147148383@qq.com>
Date: Sat, 6 Jun 2026 23:43:05 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E6=B7=BB=E5=8A=A0=20vm=20=E5=BE=AA?=
 =?UTF-8?q?=E7=8E=AF=E6=AC=A1=E6=95=B0=E4=B8=8A=E9=99=90=E4=BB=A5=E9=81=BF?=
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---
 crates/oxide_vm/src/vm.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/crates/oxide_vm/src/vm.rs b/crates/oxide_vm/src/vm.rs
index 3fd8b803..85085f4c 100644
--- a/crates/oxide_vm/src/vm.rs
+++ b/crates/oxide_vm/src/vm.rs
@@ -176,7 +176,13 @@ impl Vm {
     }
 
     fn dispatch(&mut self) -> Result<JsValue, String> {
+        let mut steps: u64 = 0;
+        const MAX_STEPS: u64 = 100_000_000;
         loop {
+            steps += 1;
+            if steps > MAX_STEPS {
+                return Err(format!("VM step limit exceeded at pc={}", self.pc));
+            }
             if self.pc >= self.bytecode.len() {
                 return Err("program counter out of bounds".into());
             }