StorageTinyLog: add regression test for UB due to unlock from different thread

Refs: #22560

src/Storages/StorageTinyLog.cpp

@@ -358,6 +358,9 @@ void TinyLogBlockOutputStream::writeSuffix()
         storage.file_checker.update(file);
     storage.file_checker.save();
 
+    /// unlock should be done from the same thread as lock, and dtor may be
+    /// called from different thread, so it should be done here (at least in
+    /// case of no exceptions occurred)
     lock.unlock();
 }
 

tests/queries/0_stateless/01795_TinyLog_rwlock_ub.sql

@@ -0,0 +1,5 @@
+DROP TABLE IF EXISTS underlying_01795;
+CREATE TABLE underlying_01795 (key UInt64) Engine=TinyLog();
+INSERT INTO FUNCTION remote('127.1', currentDatabase(), underlying_01795) SELECT toUInt64(number) FROM system.numbers LIMIT 1;
+SELECT * FROM underlying_01795 FORMAT Null;
+DROP TABLE underlying_01795;