From fa3e208668867c0d20b65d0d9828b29e7bb4af98 Mon Sep 17 00:00:00 2001
From: "Sijie.Sun" <sunsijie@buaa.edu.cn>
Date: Fri, 15 Aug 2025 22:54:58 +0800
Subject: [PATCH] fix panic of std::Instant overflow (#1243)

---
 easytier/src/common/stats_manager.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/easytier/src/common/stats_manager.rs b/easytier/src/common/stats_manager.rs
index 4329013..a950cd5 100644
--- a/easytier/src/common/stats_manager.rs
+++ b/easytier/src/common/stats_manager.rs
@@ -501,7 +501,9 @@ impl StatsManager {
             loop {
                 interval.tick().await;
 
-                let cutoff_time = Instant::now() - Duration::from_secs(180); // 3 minutes
+                let Some(cutoff_time) = Instant::now().checked_sub(Duration::from_secs(180)) else {
+                    continue;
+                };
 
                 let Some(counters) = counters_clone.upgrade() else {
                     break;