From 237707b31c4eec85396e1edc456028d9b44fde30 Mon Sep 17 00:00:00 2001
From: Alireza Ahmadi <alireza7@gmail.com>
Date: Sun, 22 Mar 2026 18:29:58 +0100
Subject: [PATCH] fix conn tracker memory leak #1056

---
 core/box.go           |  6 ++++++
 core/tracker_conn.go  | 14 ++++++++++++++
 core/tracker_stats.go |  8 ++++++++
 3 files changed, 28 insertions(+)

diff --git a/core/box.go b/core/box.go
index 172ca11..aa91b7f 100644
--- a/core/box.go
+++ b/core/box.go
@@ -554,6 +554,12 @@ func (s *Box) Close() error {
 	err = errors.Join(err, closeErr)
 	s.logger.Trace("close logger completed (", F.Seconds(time.Since(startTime).Seconds()), "s)")
 	s.logger.Info("sing-box closed (live time: ", F.Seconds(time.Since(s.createdAt).Seconds()), "s)")
+	if s.statsTracker != nil {
+		s.statsTracker.Reset()
+	}
+	if s.connTracker != nil {
+		s.connTracker.Reset()
+	}
 	return err
 }
 
diff --git a/core/tracker_conn.go b/core/tracker_conn.go
index 5b38a0f..2bd3384 100644
--- a/core/tracker_conn.go
+++ b/core/tracker_conn.go
@@ -29,6 +29,20 @@ func NewConnTracker() *ConnTracker {
 	}
 }
 
+func (c *ConnTracker) Reset() {
+	c.access.Lock()
+	defer c.access.Unlock()
+	for _, connInfo := range c.connections {
+		if connInfo.Conn != nil {
+			_ = connInfo.Conn.Close()
+		}
+		if connInfo.PacketConn != nil {
+			_ = connInfo.PacketConn.Close()
+		}
+	}
+	c.connections = make(map[string]*ConnectionInfo)
+}
+
 func (c *ConnTracker) generateConnectionID() string {
 	return uuid.Must(uuid.NewV4()).String()
 }
diff --git a/core/tracker_stats.go b/core/tracker_stats.go
index 2247660..2592693 100644
--- a/core/tracker_stats.go
+++ b/core/tracker_stats.go
@@ -34,6 +34,14 @@ func NewStatsTracker() *StatsTracker {
 	}
 }
 
+func (c *StatsTracker) Reset() {
+	c.access.Lock()
+	defer c.access.Unlock()
+	c.inbounds = make(map[string]Counter)
+	c.outbounds = make(map[string]Counter)
+	c.users = make(map[string]Counter)
+}
+
 func (c *StatsTracker) getReadCounters(inbound string, outbound string, user string) ([]*atomic.Int64, []*atomic.Int64) {
 	var readCounter []*atomic.Int64
 	var writeCounter []*atomic.Int64