MDEV-22686 # Assertion `trn' failed in ha_maria::start_stmt

Calling stmt rollback closed the transaction, which caused the above issue

mysql-test/suite/maria/create.result

@@ -31,3 +31,32 @@ select * from t2;
 f1	f2
 3	qux
 DROP TABLE t1, t2;
+CREATE TABLE t1 (a INT) ENGINE=Aria;
+INSERT INTO t1 VALUES (1);
+CREATE TABLE t2 (b INT);
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t1;
+a
+1
+SELECT * from t2;
+a
+1
+BEGIN;
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t2;
+a
+1
+COMMIT;
+LOCK TABLES t1 read, t2 write;
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t2;
+a
+1
+UNLOCK TABLES;
+CREATE TABLE t3 (a INT) engine=Aria;
+INSERT INTO t3 values(2);
+CREATE OR REPLACE TABLE t2 AS SELECT t1.a,t3.a as b FROM t1,t3;
+SELECT * from t2;
+a	b
+1	2
+DROP TABLE t1, t2, t3;

mysql-test/suite/maria/create.test

@@ -40,3 +40,38 @@ INSERT IGNORE INTO t1 VALUES (1),(2);
 CREATE OR REPLACE TABLE t2 ENGINE=Aria AS SELECT SUM(a) AS f1, IFNULL( 'qux', ExtractValue( 'foo', 'bar' ) ) AS f2 FROM t1;
 select * from t2;
 DROP TABLE t1, t2;
+
+#
+# MDEV-22686 # Assertion `trn' failed in ha_maria::start_stmt
+# ASAN heap-after-free in maria_status
+#
+
+CREATE TABLE t1 (a INT) ENGINE=Aria;
+INSERT INTO t1 VALUES (1);
+CREATE TABLE t2 (b INT);
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t1;
+SELECT * from t2;
+
+# Check also BEGIN/COMMIT
+
+BEGIN;
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t2;
+COMMIT;
+
+# Check also LOCK TABLES
+
+LOCK TABLES t1 read, t2 write;
+CREATE OR REPLACE TABLE t2 AS SELECT * FROM t1;
+SELECT * from t2;
+UNLOCK TABLES;
+
+# Check with 3 tables
+CREATE TABLE t3 (a INT) engine=Aria;
+INSERT INTO t3 values(2);
+
+CREATE OR REPLACE TABLE t2 AS SELECT t1.a,t3.a as b FROM t1,t3;
+SELECT * from t2;
+
+DROP TABLE t1, t2, t3;

storage/maria/ha_maria.cc

@@ -3450,7 +3450,10 @@ static int maria_rollback(handlerton *hton, THD *thd, bool all)
                         ER_DATA_WAS_COMMITED_UNDER_ROLLBACK,
                         ER_THD(thd, ER_DATA_WAS_COMMITED_UNDER_ROLLBACK),
                         "Aria");
-  DBUG_RETURN(maria_commit(hton, thd, all));
+  if (all)
+    DBUG_RETURN(maria_commit(hton, thd, all));
+  /* Statement rollbacks are ignored. Commit will happen in external_lock */
+  DBUG_RETURN(0);
 }
 
 #else