From 789fb8b9c119466603e2f4c5cfe4ef37b0ee750a Mon Sep 17 00:00:00 2001
From: PobreGato <315121269+pobregat0@users.noreply.github.com>
Date: Thu, 3 Sep 2026 01:58:09 +0300
Subject: [PATCH] check datagram sessions for empty under the lock

---
 libi2pd/Datagram.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libi2pd/Datagram.cpp b/libi2pd/Datagram.cpp
index 8428cd3d..9fb7776e 100644
--- a/libi2pd/Datagram.cpp
+++ b/libi2pd/Datagram.cpp
@@ -488,10 +488,10 @@ namespace datagram
 
 	void DatagramDestination::CleanUp ()
 	{
-		if (m_Sessions.empty ()) return;
 		auto now = i2p::util::GetMillisecondsSinceEpoch();
-		LogPrint(eLogDebug, "DatagramDestination: clean up sessions");
 		std::unique_lock<std::mutex> lock(m_SessionsMutex);
+		if (m_Sessions.empty ()) return;
+		LogPrint(eLogDebug, "DatagramDestination: clean up sessions");
 		// for each session ...
 		for (auto it = m_Sessions.begin (); it != m_Sessions.end (); )
 		{