From 0710f62948dec5d991caef70aa0021c58a6e5308 Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Fri, 4 Oct 2024 20:44:58 -0400
Subject: [PATCH] fixed potential race condition

---
 libi2pd/SSU2.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libi2pd/SSU2.cpp b/libi2pd/SSU2.cpp
index 5f2cb0cf..1a1965e1 100644
--- a/libi2pd/SSU2.cpp
+++ b/libi2pd/SSU2.cpp
@@ -1336,8 +1336,11 @@ namespace transport
 			
 			// exclude all existing sessions
 			excluded.clear ();
-			for (const auto& [ident, s] : m_SessionsByRouterHash)
-				excluded.insert (ident);
+			{
+				std::lock_guard<std::mutex> l(m_SessionsByRouterHashMutex);
+				for (const auto& [ident, s] : m_SessionsByRouterHash)
+					excluded.insert (ident);
+			}	
 
 			// sesssion about to expire are not counted
 			for (auto i = introducers.size (); i < SSU2_MAX_NUM_INTRODUCERS + numOldSessions; i++)