From 96f907bb235455521a11992675cdf12c9508d822 Mon Sep 17 00:00:00 2001
From: Zsolt Parragi <zsolt.parragi@percona.com>
Date: Mon, 26 Mar 2018 11:14:11 +0200
Subject: [PATCH] PS-3925: Use strncmp instead of memcmp in log_in_use

(cherry picked from commit 2c950c3ca2bf890549825417c10dd3065b78befc)
(cherry picked from commit 2fb17005e0d4b5d3c3c53d817e2be1c899a94e59)
---
 sql/binlog.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/binlog.cc b/sql/binlog.cc
index b17d7b01671..ae00d49d6e7 100644
--- a/sql/binlog.cc
+++ b/sql/binlog.cc
@@ -2800,7 +2800,7 @@ class Log_in_use : public Do_THD_Impl
     mysql_mutex_lock(&thd->LOCK_thd_data);
     if ((linfo = thd->current_linfo))
     {
-      if(!memcmp(m_log_name, linfo->log_file_name, m_log_name_len))
+      if(!strncmp(m_log_name, linfo->log_file_name, m_log_name_len))
       {
         sql_print_warning("file %s was not purged because it was being read"
                           "by thread number %u", m_log_name, thd->thread_id());