MySQL Bugs: #39300: low memory crash with create temporary table x select * from y

Bug #39300	low memory crash with create temporary table x select * from y
Submitted:	8 Sep 2008 8:54
Reporter:	Shane Bester
Status:	Analyzing
Category:	Server: Federated	Severity:	S2 (Serious)
Version:	5.0.66a	OS:	Any
Assigned to:	Shane Bester	Target Version:

Description:
call stack:

mysqld-debug.exe!Field::eq_def(Field * field=0x00000000)  Line 7947
mysqld-debug.exe!create_tmp_field Line 9156
mysqld-debug.exe!create_table_from_items Line 3186
mysqld-debug.exe!select_create::prepare 
mysqld-debug.exe!JOIN::prepare
mysqld-debug.exe!mysql_select
mysqld-debug.exe!handle_select
mysqld-debug.exe!mysql_execute_command
mysqld-debug.exe!mysql_parse
mysqld-debug.exe!dispatch_command
mysqld-debug.exe!do_command
mysqld-debug.exe!handle_one_connection
mysqld-debug.exe!pthread_start
mysqld-debug.exe!_threadstart

How to repeat:
you have to start mysql like this:

mysqld-debug --console --safemalloc-mem-limit=15485760 --skip-grant-tables
--skip-name-resolve

notice the --safemalloc-mem-limit option will be used to fake an out of memory condition.
 testcase will be uploaded later.

here's another call stack observed by same crash.   The problem is federated is pulling
entire resultset into memory, and somewhere not checking for OOM errors.

                                                             
mysqld-debug.exe!str_to_datetime                             
mysqld-debug.exe!Field_datetime::store                       
mysqld-debug.exe!ha_federated::convert_row_to_internal_format
mysqld-debug.exe!ha_federated::read_next                     
mysqld-debug.exe!ha_federated::rnd_next                      
mysqld-debug.exe!rr_sequential                               
mysqld-debug.exe!join_init_read_record                       
mysqld-debug.exe!sub_select                                  
mysqld-debug.exe!do_select                                   
mysqld-debug.exe!JOIN::exec                                  
mysqld-debug.exe!mysql_select                                
mysqld-debug.exe!handle_select                               
mysqld-debug.exe!mysql_execute_command                       
mysqld-debug.exe!mysql_parse                                 
mysqld-debug.exe!dispatch_command                            
mysqld-debug.exe!do_command                                  
mysqld-debug.exe!handle_one_connection                       
mysqld-debug.exe!pthread_start                               
mysqld-debug.exe!_threadstart