From 08a3dcd587e53bb1e8c9aae07057d7c58815f2a8 Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Wed, 24 Sep 2025 14:12:25 +0300
Subject: [PATCH] Prevent vector out-of-bounds in kv alloc_block (from #95)

---
 src/kv/kv_db.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/kv/kv_db.cpp b/src/kv/kv_db.cpp
index 2343a3aa..43b0a0d6 100644
--- a/src/kv/kv_db.cpp
+++ b/src/kv/kv_db.cpp
@@ -630,7 +630,10 @@ uint64_t kv_db_t::alloc_block()
     {
         // Allow to reconfigure <max_allocate_blocks> online
         if (allocating_blocks.size() > max_allocate_blocks)
+        {
             allocating_blocks.erase(allocating_blocks.begin()+allocating_block_pos, allocating_blocks.begin()+allocating_block_pos+1);
+            allocating_block_pos = allocating_block_pos % allocating_blocks.size();
+        }
         else
             allocating_blocks[allocating_block_pos].offset = UINT64_MAX;
     }