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bug in JOIN_TAB::cleanup() that caused freed memory to be accessed

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This commit is contained in:
Monty
2015-09-27 21:28:07 +02:00
committed by Sergei Golubchik
parent 4193fa7ae2
commit 8ed5fde3e1
1 changed files with 4 additions and 2 deletions
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6
sql/sql_select.cc
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@ -11472,14 +11472,16 @@ void JOIN_TAB::cleanup()
} }
else else
{ {
TABLE_LIST *tmp= table->pos_in_table_list;
end_read_record(&read_record); end_read_record(&read_record);
table->pos_in_table_list->jtbm_subselect->cleanup(); tmp->jtbm_subselect->cleanup();
/* /*
The above call freed the materializedd temptable. Set it to NULL so The above call freed the materializedd temptable. Set it to NULL so
that we don't attempt to touch it if JOIN_TAB::cleanup() is invoked that we don't attempt to touch it if JOIN_TAB::cleanup() is invoked
multiple times (it may be) multiple times (it may be)
*/ */
table=NULL; tmp->table= NULL;
table= NULL;
} }
DBUG_VOID_RETURN; DBUG_VOID_RETURN;
} }