From f4b7b0dca608650382709d00ef999c4e8a97e05f Mon Sep 17 00:00:00 2001
From: root <root@redirector.t2.ucsd.edu>
Date: Wed, 1 Nov 2017 12:31:38 -0700
Subject: [PATCH] Bugfix: access history is fixed size now, make sure we do not
 read beyond the end.

---
 src/XrdFileCache/XrdFileCacheInfo.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/XrdFileCache/XrdFileCacheInfo.cc b/src/XrdFileCache/XrdFileCacheInfo.cc
index 1912debe36e..90d2db71f2a 100644
--- a/src/XrdFileCache/XrdFileCacheInfo.cc
+++ b/src/XrdFileCache/XrdFileCacheInfo.cc
@@ -378,6 +378,7 @@ bool Info::GetLatestDetachTime(time_t& t) const
 {
    if (! m_store.m_accessCnt) return false;
 
-   t =  m_store.m_astats[m_store.m_accessCnt-1].DetachTime;
+   size_t entry = std::min(m_store.m_accessCnt, m_maxNumAccess) - 1;
+   t =  m_store.m_astats[entry].DetachTime;
    return true;
 }