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MDEV-20926 UBSAN: load of value 165, which is not a valid value for type bool

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Basicaly it's an uninitialized read. 165 is 0xa5 which comes from TRASH_ALLOC()

Fix by calling a class ctor which initializes problematic
TMP_TABLE_PARAM::force_copy_fields field
This commit is contained in:
Eugene Kosov
2019-10-30 12:53:25 +03:00
parent bc8a9ab5f3
commit a7e3008ab3
1 changed files with 1 additions and 2 deletions
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3
sql/sql_show.cc
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@ -7708,8 +7708,7 @@ TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list)
item->maybe_null= (fields_info->field_flags & MY_I_S_MAYBE_NULL);
field_count++;
}
TMP_TABLE_PARAM *tmp_table_param =
(TMP_TABLE_PARAM*) (thd->alloc(sizeof(TMP_TABLE_PARAM)));
TMP_TABLE_PARAM *tmp_table_param = new TMP_TABLE_PARAM;
tmp_table_param->init();
tmp_table_param->table_charset= cs;
tmp_table_param->field_count= field_count;