Merge 10.1 into 10.2

Rewrite the MDEV-13818 fix to prevent heap-use-after-free.

Add a test case for MDEV-18272.

Author: dr-m

dbug/tests.c

@@ -86,3 +86,11 @@ int main (int argc __attribute__((unused)),
   return 0;
 #endif /* DBUG_OFF */
 }
+
+#ifdef __SANITIZE_ADDRESS__
+/* Disable LeakSanitizer in this executable */
+const char* __asan_default_options()
+{
+  return "detect_leaks=0";
+}
+#endif

include/my_pthread.h

@@ -693,8 +693,12 @@ extern void my_mutex_end(void);
   We need to have at least 256K stack to handle calls to myisamchk_init()
   with the current number of keys and key parts.
 */
+#ifdef __SANITIZE_ADDRESS__
+#define DEFAULT_THREAD_STACK	(364*1024L)
+#else
 #define DEFAULT_THREAD_STACK	(292*1024L)
 #endif
+#endif
 
 #define MY_PTHREAD_LOCK_READ 0
 #define MY_PTHREAD_LOCK_WRITE 1

mysql-test/suite/sys_vars/inc/sysvars_server.inc

@@ -13,7 +13,7 @@ set sql_mode=ansi_quotes;
 set global div_precision_increment=5;
 
 --replace_regex /^\/\S+/PATH/
---replace_result $MASTER_MYPORT MASTER_MYPORT
+--replace_result $MASTER_MYPORT MASTER_MYPORT 372736 299008
 select * from information_schema.system_variables
   where variable_name not like 'aria%' and
         variable_name not like 'debug%' and

mysql-test/suite/sys_vars/t/thread_stack_basic.test

@@ -1,17 +1,17 @@
 #
 # only global
 #
---replace_result 196608 262144
+--replace_result 372736 299008
 select @@global.thread_stack;
 --error ER_INCORRECT_GLOBAL_LOCAL_VAR
 select @@session.thread_stack;
---replace_result 196608 262144
+--replace_result 372736 299008
 show global variables like 'thread_stack';
---replace_result 196608 262144
+--replace_result 372736 299008
 show session variables like 'thread_stack';
---replace_result 196608 262144
+--replace_result 372736 299008
 select * from information_schema.global_variables where variable_name='thread_stack';
---replace_result 196608 262144
+--replace_result 372736 299008
 select * from information_schema.session_variables where variable_name='thread_stack';
 
 #

mysql-test/t/mysqld--help.test

@@ -57,7 +57,7 @@ perl;
     # fixes for 32-bit
     s/\b4294967295\b/18446744073709551615/;
     s/\b2146435072\b/9223372036853727232/;
-    s/\b196608\b/262144/;
+    s/\b372736\b/299008/;
     s/\b4294963200\b/18446744073709547520/;
     foreach $var (@env) { s/\Q$ENV{$var}\E/$var/ }
     next if /use --skip-(use-)?symbolic-links to disable/; # for valgrind, again

storage/innobase/dict/dict0dict.cc

@@ -6198,23 +6198,16 @@ dict_ind_free()
 /** Get an index by name.
 @param[in]	table		the table where to look for the index
 @param[in]	name		the index name to look for
-@param[in]	committed	true=search for committed,
-false=search for uncommitted
 @return index, NULL if does not exist */
 dict_index_t*
-dict_table_get_index_on_name(
-	dict_table_t*	table,
-	const char*	name,
-	bool		committed)
+dict_table_get_index_on_name(dict_table_t* table, const char* name)
 {
 	dict_index_t*	index;
 
 	index = dict_table_get_first_index(table);
 
 	while (index != NULL) {
-		if (index->is_committed() == committed
-		    && strcmp(index->name, name) == 0) {
-
+		if (index->is_committed() && !strcmp(index->name, name)) {
 			return(index);
 		}
 

storage/innobase/handler/handler0alter.cc

@@ -4860,26 +4860,31 @@ prepare_inplace_alter_table_dict(
 
 	/* Create the indexes in SYS_INDEXES and load into dictionary. */
 
-	for (int a = 0; a < ctx->num_to_add_index; a++) {
-
+	for (ulint a = 0; a < ctx->num_to_add_index; a++) {
 		if (index_defs[a].ind_type & DICT_VIRTUAL
 		    && ctx->num_to_drop_vcol > 0 && !new_clustered) {
 			innodb_v_adjust_idx_col(ha_alter_info, old_table,
 						ctx->num_to_drop_vcol,
 						&index_defs[a]);
 		}
 
+		DBUG_EXECUTE_IF(
+			"create_index_metadata_fail",
+			if (a + 1 == ctx->num_to_add_index) {
+				ctx->trx->error_state = DB_OUT_OF_FILE_SPACE;
+				ctx->add_index[a] = NULL;
+				goto index_created;
+			});
 		ctx->add_index[a] = row_merge_create_index(
 			ctx->trx, ctx->new_table, &index_defs[a], add_v);
-
+#ifndef DBUG_OFF
+index_created:
+#endif
 		add_key_nums[a] = index_defs[a].key_number;
 
 		if (!ctx->add_index[a]) {
 			error = ctx->trx->error_state;
 			DBUG_ASSERT(error != DB_SUCCESS);
-			while (--a >= 0) {
-				dict_mem_index_free(ctx->add_index[a]);
-			}
 			goto error_handling;
 		}
 

storage/innobase/include/dict0dict.h

@@ -2,7 +2,7 @@
 
 Copyright (c) 1996, 2018, Oracle and/or its affiliates. All Rights Reserved.
 Copyright (c) 2012, Facebook Inc.
-Copyright (c) 2013, 2018, MariaDB Corporation.
+Copyright (c) 2013, 2019, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -1599,31 +1599,21 @@ dict_tables_have_same_db(
 /** Get an index by name.
 @param[in]	table		the table where to look for the index
 @param[in]	name		the index name to look for
-@param[in]	committed	true=search for committed,
-false=search for uncommitted
 @return index, NULL if does not exist */
 dict_index_t*
-dict_table_get_index_on_name(
-	dict_table_t*	table,
-	const char*	name,
-	bool		committed=true)
+dict_table_get_index_on_name(dict_table_t* table, const char* name)
 		MY_ATTRIBUTE((warn_unused_result));
 
 /** Get an index by name.
 @param[in]	table		the table where to look for the index
 @param[in]	name		the index name to look for
-@param[in]	committed	true=search for committed,
-false=search for uncommitted
 @return index, NULL if does not exist */
 inline
 const dict_index_t*
-dict_table_get_index_on_name(
-	const dict_table_t*	table,
-	const char*		name,
-	bool			committed=true)
+dict_table_get_index_on_name(const dict_table_t* table, const char* name)
 {
-	return(dict_table_get_index_on_name(
-		       const_cast<dict_table_t*>(table), name, committed));
+	return dict_table_get_index_on_name(const_cast<dict_table_t*>(table),
+					    name);
 }
 
 /***************************************************************

storage/innobase/row/row0merge.cc

@@ -1,7 +1,7 @@
 /*****************************************************************************
 
 Copyright (c) 2005, 2017, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2014, 2018, MariaDB Corporation.
+Copyright (c) 2014, 2019, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -4310,7 +4310,7 @@ dberr_t
 row_merge_create_index_graph(
 	trx_t*			trx,
 	dict_table_t*		table,
-	dict_index_t*		index,
+	dict_index_t*&		index,
 	const dict_add_v_col_t* add_v)
 {
 	ind_node_t*	node;		/*!< Index creation node */
@@ -4337,6 +4337,8 @@ row_merge_create_index_graph(
 
 	err = trx->error_state;
 
+	index = node->index;
+
 	que_graph_free((que_t*) que_node_get_parent(thr));
 
 	DBUG_RETURN(err);
@@ -4400,25 +4402,23 @@ row_merge_create_index(
 		dict_mem_index_add_field(index, name, ifield->prefix_len);
 	}
 
+	ut_d(const dict_index_t* const index_template = index);
 	/* Add the index to SYS_INDEXES, using the index prototype. */
 	err = row_merge_create_index_graph(trx, table, index, add_v);
 
 	if (err == DB_SUCCESS) {
-
-		index = dict_table_get_index_on_name(table, index_def->name,
-						     index_def->rebuild);
-
-		ut_a(index);
-
+		ut_ad(index != index_template);
 		index->parser = index_def->parser;
 		index->has_new_v_col = has_new_v_col;
-
 		/* Note the id of the transaction that created this
 		index, we use it to restrict readers from accessing
 		this index, to ensure read consistency. */
 		ut_ad(index->trx_id == trx->id);
 	} else {
-		dict_mem_index_free(index);
+		ut_ad(!index || index == index_template);
+		if (index) {
+			dict_mem_index_free(index);
+		}
 		index = NULL;
 	}
 

storage/innobase/row/row0mysql.cc

@@ -706,8 +706,7 @@ row_mysql_handle_errors(
 	switch (err) {
 	case DB_LOCK_WAIT_TIMEOUT:
 		if (row_rollback_on_timeout) {
-			trx_rollback_to_savepoint(trx, NULL);
-			break;
+			goto rollback;
 		}
 		/* fall through */
 	case DB_DUPLICATE_KEY:
@@ -726,6 +725,7 @@ row_mysql_handle_errors(
 	case DB_TABLE_NOT_FOUND:
 	case DB_DECRYPTION_FAILED:
 	case DB_COMPUTE_VALUE_FAILED:
+	rollback_to_savept:
 		DBUG_EXECUTE_IF("row_mysql_crash_if_error", {
 					log_buffer_flush_to_disk();
 					DBUG_SUICIDE(); });
@@ -752,6 +752,7 @@ row_mysql_handle_errors(
 
 	case DB_DEADLOCK:
 	case DB_LOCK_TABLE_FULL:
+	rollback:
 		/* Roll back the whole transaction; this resolution was added
 		to version 3.23.43 */
 
@@ -773,13 +774,13 @@ row_mysql_handle_errors(
 			" tablespace. If the mysqld server crashes after"
 			" the startup or when you dump the tables. "
 			<< FORCE_RECOVERY_MSG;
-		break;
+		goto rollback_to_savept;
 	case DB_FOREIGN_EXCEED_MAX_CASCADE:
 		ib::error() << "Cannot delete/update rows with cascading"
 			" foreign key constraints that exceed max depth of "
 			<< FK_MAX_CASCADE_DEL << ". Please drop excessive"
 			" foreign constraints and try again";
-		break;
+		goto rollback_to_savept;
 	default:
 		ib::fatal() << "Unknown error code " << err << ": "
 			<< ut_strerr(err);