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MDEV-13012 Assertion `share->error' failed in discover_handlerton upon executing statement with max_session_mem_used = 8192

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MDEV-13011 Server crashes in THD::handle_condition or Assertion `! is_set() || m_can_overwrite_status' fails upon attempt to connect with max_session_mem_used = 8192

errors when a connection is killed in the
* TABLE_SHARE::init_from_sql_statement_string()
* THD::init()

also, safety-wise, don't check max_mem_used on free() and when some error
was already issued.
This commit is contained in:
Sergei Golubchik
2017-06-15 20:16:18 +02:00
parent d937916c06
commit b6ce68f450
5 changed files with 25 additions and 5 deletions
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4
mysql-test/r/errors.result
View File

@ -168,3 +168,7 @@ UPDATE t1 SET a = 'new'
WHERE COLUMN_CREATE( 1, 'v', 1, 'w' ) IS NULL;
ERROR 22007: Illegal value used as argument of dynamic column function
drop table t1;
set max_session_mem_used = 8192;
select * from seq_1_to_1000;
ERROR HY000: Engine SEQUENCE failed to discover table `test`.`seq_1_to_1000` with 'create table seq (seq bigint unsigned primary key)'
set global max_session_mem_used = default;

9
mysql-test/t/errors.test
View File

@ -1,6 +1,7 @@
#
# Test some error conditions
#
--source include/have_sequence.inc
--disable_warnings
drop table if exists t1;
@ -198,3 +199,11 @@ CREATE TABLE t1 (a CHAR(3), b BLOB);
UPDATE t1 SET a = 'new'
WHERE COLUMN_CREATE( 1, 'v', 1, 'w' ) IS NULL;
drop table t1;
#
# errors caused by max_session_mem_used
#
set max_session_mem_used = 8192;
--error ER_SQL_DISCOVER_ERROR
select * from seq_1_to_1000;
set global max_session_mem_used = default;

7
sql/handler.cc
View File

@ -4857,7 +4857,12 @@ static my_bool discover_handlerton(THD *thd, plugin_ref plugin,
{
if (error)
{
DBUG_ASSERT(share->error); // tdc_lock_share needs that
if (!share->error)
{
share->error= OPEN_FRM_ERROR_ALREADY_ISSUED;
plugin_unlock(0, share->db_plugin);
}
/*
report an error, unless it is "generic" and a more
specific one was already reported

8
sql/mysqld.cc
View File

@ -3939,8 +3939,9 @@ static void my_malloc_size_cb_func(long long size, my_bool is_thread_specific)
(longlong) thd->status_var.local_memory_used,
size));
thd->status_var.local_memory_used+= size;
if (thd->status_var.local_memory_used > (int64)thd->variables.max_mem_used &&
!thd->killed)
if (size > 0 &&
thd->status_var.local_memory_used > (int64)thd->variables.max_mem_used &&
!thd->killed && !thd->get_stmt_da()->is_set())
{
char buf[1024];
thd->killed= KILL_QUERY;
@ -6646,11 +6647,12 @@ void handle_connections_sockets()
*/
DBUG_PRINT("info", ("Creating THD for new connection"));
if (!(thd= new THD))
if (!(thd= new THD) || thd->is_error())
{
(void) mysql_socket_shutdown(new_sock, SHUT_RDWR);
(void) mysql_socket_close(new_sock);
statistic_increment(connection_errors_internal, &LOCK_status);
delete thd;
continue;
}
/* Set to get io buffers to be part of THD */

2
sql/sql_class.cc
View File

@ -879,6 +879,7 @@ THD::THD(bool is_wsrep_applier)
debug_sync_control(0),
#endif /* defined(ENABLED_DEBUG_SYNC) */
wait_for_commit_ptr(0),
m_internal_handler(0),
main_da(0, false, false),
m_stmt_da(&main_da),
tdc_hash_pins(0),
@ -1073,7 +1074,6 @@ THD::THD(bool is_wsrep_applier)
MYF(MY_WME|MY_THREAD_SPECIFIC));
}
m_internal_handler= NULL;
m_binlog_invoker= INVOKER_NONE;
memset(&invoker_user, 0, sizeof(invoker_user));
memset(&invoker_host, 0, sizeof(invoker_host));