From d2aa3b6bb01b4147c5486bb6e542dd9a78a9f7af Mon Sep 17 00:00:00 2001
From: Alexey Rybalchenko <alexryba@gmail.com>
Date: Sat, 28 May 2022 13:30:56 +0200
Subject: [PATCH] shm: open managament data as read only during cleanup

---
 fairmq/shmem/Monitor.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fairmq/shmem/Monitor.cxx b/fairmq/shmem/Monitor.cxx
index 22462e21..65e0f595 100644
--- a/fairmq/shmem/Monitor.cxx
+++ b/fairmq/shmem/Monitor.cxx
@@ -574,7 +574,7 @@ std::vector<std::pair<std::string, bool>> Monitor::Cleanup(const ShmId& shmIdT,
 
     string managementSegmentName("fmq_" + shmId + "_mng");
     try {
-        bipc::managed_shared_memory managementSegment(bipc::open_only, managementSegmentName.c_str());
+        bipc::managed_shared_memory managementSegment(bipc::open_read_only, managementSegmentName.c_str());
 
         Uint16RegionInfoHashMap* shmRegions = managementSegment.find<Uint16RegionInfoHashMap>(bipc::unique_instance).first;
         if (shmRegions) {