From 77e23b84c31f25c75bbb0b617077b41f9f1cf018 Mon Sep 17 00:00:00 2001
From: vporyadke <zalyalov@ydb.tech>
Date: Fri, 25 Oct 2024 00:05:40 +0300
Subject: [PATCH] fix use after free on follower deletion (#10863)

---
 ydb/core/mind/hive/hive_impl.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ydb/core/mind/hive/hive_impl.cpp b/ydb/core/mind/hive/hive_impl.cpp
index cafce3a1b80f..9c250e144647 100644
--- a/ydb/core/mind/hive/hive_impl.cpp
+++ b/ydb/core/mind/hive/hive_impl.cpp
@@ -257,12 +257,12 @@ void THive::ExecuteProcessBootQueue(NIceDb::TNiceDb& db, TSideEffects& sideEffec
                         sideEffects.Send(actorToNotify, new TEvPrivate::TEvRestartComplete(tablet->GetFullTabletId(), "boot delay"));
                     }
                     tablet->ActorsToNotifyOnRestart.clear();
+                    tablet->InWaitQueue = true;
                     if (tablet->IsFollower()) {
                         TLeaderTabletInfo& leader = tablet->GetLeader();
-                        UpdateTabletFollowersNumber(leader, db, sideEffects);
+                        UpdateTabletFollowersNumber(leader, db, sideEffects); // this may delete tablet
                     }
                     BootQueue.AddToWaitQueue(record); // waiting for new node
-                    tablet->InWaitQueue = true;
                     continue;
                 }
             }