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MDEV-7938 MariaDB Crashes Suddenly while writing binlogs

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on disconnect THD must clean user_var_events array before
dropping temporary tables. Otherwise when binlogging a DROP,
it'll access user_var_events, but they were allocated
in the already freed memroot.
This commit is contained in:
Sergei Golubchik
2015-04-26 16:27:41 +02:00
parent 053143efe1
commit e26b2071be
3 changed files with 26 additions and 1 deletions
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sql/sql_class.cc
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@@ -1394,6 +1394,7 @@ void THD::cleanup(void)
mysql_ha_cleanup(this);
locked_tables_list.unlock_locked_tables(this);
delete_dynamic(&user_var_events);
close_temporary_tables(this);
transaction.xid_state.xa_state= XA_NOTR;
@@ -1427,7 +1428,6 @@ void THD::cleanup(void)
debug_sync_end_thread(this);
#endif /* defined(ENABLED_DEBUG_SYNC) */
delete_dynamic(&user_var_events);
my_hash_free(&user_vars);
sp_cache_clear(&sp_proc_cache);
sp_cache_clear(&sp_func_cache);