From b3aeef43df7f59dfb6fff77291340c1680aa924f Mon Sep 17 00:00:00 2001
From: "Ruben S. Montero" <rsmontero@opennebula.org>
Date: Tue, 31 Aug 2021 19:05:04 +0200
Subject: [PATCH] M #-: Deal with Address Range resize to 0

(cherry picked from commit e8f1a7641cf36831bf5426b1d2f17120ab893d2a)
---
 src/vnm/AddressRange.cc | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/vnm/AddressRange.cc b/src/vnm/AddressRange.cc
index efe1839d8b..b8e2abb463 100644
--- a/src/vnm/AddressRange.cc
+++ b/src/vnm/AddressRange.cc
@@ -446,7 +446,18 @@ int AddressRange::update_attributes(
             return -1;
         }
 
-        if (allocated.upper_bound(new_size-1) != allocated.end())
+        std::map<unsigned int, long long>::iterator it;
+
+        if ( new_size == 0 )
+        {
+            it = allocated.find(0);
+        }
+        else
+        {
+            it = allocated.upper_bound(new_size - 1);
+        }
+
+        if (it != allocated.end())
         {
             error_msg = "New SIZE cannot be applied. There are used leases"
                     " that would fall outside the range.";