1 files changed, 55 insertions, 0 deletions
diff --git a/mysql-test/t/lock_sync.test b/mysql-test/t/lock_sync.test
index d5ad7becd7d..bcb78b5b600 100644
--- a/mysql-test/t/lock_sync.test
+++ b/mysql-test/t/lock_sync.test
@@ -1136,6 +1136,61 @@ DROP TABLE t1;
 disconnect con1;
 disconnect con2;
 
+--echo #
+--echo # Bug#19070633 - POSSIBLE ACCESS TO FREED MEMORY IN IS_FREE_LOCK() AND IS_USED_LOCK().
+--echo #
+
+--enable_connect_log
+
+--echo # Verifying issue for IS_FREE_LOCK() function.
+SELECT GET_LOCK("lock_19070633", 600);
+
+connect (con1, localhost, root,,);
+--echo # Waiting after getting user level lock info and releasing mutex.
+SET DEBUG_SYNC= 'after_getting_user_level_lock_info SIGNAL parked WAIT_FOR go';
+--echo # Sending: SELECT IS_FREE_LOCK("lock_19070633");
+send SELECT IS_FREE_LOCK("lock_19070633");
+
+connection default;
+SET DEBUG_SYNC= 'now WAIT_FOR parked';
+SELECT RELEASE_LOCK("lock_19070633");
+--echo # Signaling connection con1 after releasing the lock.
+--echo # Without fix, accessing user level lock info in con1 would result in
+--echo # crash or valgrind issue invalid read is reported.
+SET DEBUG_SYNC= 'now SIGNAL go';
+
+connection con1;
+--echo # Reaping: SELECT IS_FREE_LOCK("lock_19070633");
+--reap
+
+connection default;
+--echo # Verifying issue for IS_USED_LOCK() function.
+SELECT GET_LOCK("lock_19070633", 600);
+
+connection con1;
+--echo # Waiting after getting user level lock info and releasing mutex.
+SET DEBUG_SYNC= 'after_getting_user_level_lock_info SIGNAL parked WAIT_FOR go';
+--echo # Sending: SELECT IS_USED_LOCK("lock_19070633");
+send SELECT IS_USED_LOCK("lock_19070633");
+
+connection default;
+SET DEBUG_SYNC= 'now WAIT_FOR parked';
+SELECT RELEASE_LOCK("lock_19070633");
+--echo # Signaling connection con1 after releasing the lock.
+--echo # Without fix, accessing user level lock info in con1 would result in
+--echo # crash or valgrind issue invalid read is reported.
+SET DEBUG_SYNC= 'now SIGNAL go';
+
+connection con1;
+--echo # Reaping: SELECT IS_USED_LOCK("lock_19070633");
+--replace_column 1 #
+--reap
+
+connection default;
+SET DEBUG_SYNC= 'RESET';
+disconnect con1;
+
+--disable_connect_log
 
 # Check that all connections opened by test cases in this file are really
 # gone so execution of other tests won't be affected by their presence.