The following problems have been found by Coverity - static analysis tool.

mysql-5.5.31/plugin/semisync/semisync_master.cc:672:parameter_as_source – Note: This defect has an elevated risk because the source argument is a parameter of the current function. 

mysql-5.5.31/plugin/semisync/semisync_master.cc:661:parameter_as_source – Note: This defect has an elevated risk because the source argument is a parameter of the current function. 

mysql-5.5.31/plugin/semisync/semisync_master.cc:555:parameter_as_source – Note: This defect has an elevated risk because the source argument is a parameter of the current function.

diff -up mariadb-10.0.15/plugin/semisync/semisync_master.cc.orig mariadb-10.0.15/plugin/semisync/semisync_master.cc

--- mariadb-10.0.15/plugin/semisync/semisync_master.cc.orig	2014-11-27 15:16:59.664855517 +0100

+++ mariadb-10.0.15/plugin/semisync/semisync_master.cc	2014-11-27 15:16:17.029779375 +0100

@@ -555,7 +555,8 @@ int ReplSemiSyncMaster::reportReplyBinlo

   if (need_copy_send_pos)

   {

-    strcpy(reply_file_name_, log_file_name);

+    strncpy(reply_file_name_, log_file_name, sizeof(reply_file_name_)-1);

+    reply_file_name_[sizeof(reply_file_name_)-1] = '\0';

     reply_file_pos_ = log_file_pos;

     reply_file_name_inited_ = true;

@@ -663,7 +664,8 @@ int ReplSemiSyncMaster::commitTrx(const

         if (cmp <= 0)

 	{

           /* This thd has a lower position, let's update the minimum info. */

-          strcpy(wait_file_name_, trx_wait_binlog_name);

+          strncpy(wait_file_name_, trx_wait_binlog_name, sizeof(wait_file_name_)-1);

+          wait_file_name_[sizeof(wait_file_name_)-1] = '\0';

           wait_file_pos_ = trx_wait_binlog_pos;

           rpl_semi_sync_master_wait_pos_backtraverse++;

@@ -674,7 +676,8 @@ int ReplSemiSyncMaster::commitTrx(const

       }

       else

       {

-        strcpy(wait_file_name_, trx_wait_binlog_name);

+        strncpy(wait_file_name_, trx_wait_binlog_name, sizeof(wait_file_name_)-1);

+        wait_file_name_[sizeof(wait_file_name_)-1] = '\0';

         wait_file_pos_ = trx_wait_binlog_pos;

         wait_file_name_inited_ = true;

mysql-5.5.31/sql/rpl_handler.cc:306:fixed_size_dest – You might overrun the 512 byte fixed-size string "log_info->log_file" by copying "log_file + dirname_length(log_file)" without checking the length. diff -up mysql-5.5.31/sql/rpl_handler.cc.covscan-stroverflow mysql-5.5.31/sql/rpl_handler.cc

diff -up mariadb-10.1.11/sql/rpl_handler.cc.stroverflow mariadb-10.1.11/sql/rpl_handler.cc

--- mariadb-10.1.11/sql/rpl_handler.cc.stroverflow	2016-02-07 14:59:15.828635150 +0100

+++ mariadb-10.1.11/sql/rpl_handler.cc	2016-02-07 15:01:01.776653452 +0100

@@ -267,7 +267,8 @@ int Binlog_storage_delegate::after_flush

     thd->semisync_info= log_info;

   }

-  strcpy(log_info->log_file, log_file+dirname_length(log_file));

+  strncpy(log_info->log_file, log_file+dirname_length(log_file), sizeof(log_info->log_file)-1);

+  log_info->log_file[sizeof(log_info->log_file)-1] = '\0';

   log_info->log_pos = log_pos;

   FOREACH_OBSERVER(ret, after_flush, false,