Bug #8888 Crash with Subselects: SELECT 1 FROM x WHERE (SELECT 1) in (SELECT 1)
Submitted: 2 Mar 2005 12:43 Modified: 11 Apr 2005 2:13
Reporter: Christian Hammers (Silver Quality Contributor) (OCA) Email Updates:
Status: Closed Impact on me:
Category:MySQL Server Severity:S2 (Serious)
Version:4.1.10 OS:
Assigned to: Oleksandr Byelkin CPU Architecture:Any

[2 Mar 2005 12:43] Christian Hammers
As reported in http://bugs.debian.org/297687 by Dobai-Pataky Balint there is a
nice sig11 crash when using Subselects.

How to repeat:
> SELECT 1 FROM mysql.user WHERE (SELECT 1) in (SELECT 1);
ERROR 2013 (HY000): Lost connection to MySQL server during query

Suggested fix:
[2 Mar 2005 12:47] Victoria Reznichenko
(gdb) bt
#0  0xb7ceea21 in kill () from /lib/libc.so.6
#1  0xb7e49051 in pthread_kill () from /lib/libpthread.so.0
#2  0xb7e4942b in raise () from /lib/libpthread.so.0
#3  0xb7cee7b4 in raise () from /lib/libc.so.6
#4  0xb7cefc7d in abort () from /lib/libc.so.6
#5  0xb7ce7def in __assert_fail () from /lib/libc.so.6
#6  0x08136a26 in subselect_single_select_engine::cols (this=0x8c39168) at item_subselect.cc:1429
#7  0x081336dc in Item_singlerow_subselect::cols (this=0x8c390d8) at item_subselect.cc:433
#8  0x081359bb in Item_in_subselect::select_transformer (this=0x8c39408, join=0x8c39f60)
    at item_subselect.cc:1055
#9  0x0818da81 in JOIN::prepare (this=0x8c39f60, rref_pointer_array=0x8c39294, tables_init=0x0,
    wild_num=0, conds_init=0x0, og_num=0, order_init=0x0, group_init=0x0, having_init=0x0,
    proc_param_init=0x0, select_lex_arg=0x8c39190, unit_arg=0x8c392c0) at sql_select.cc:305
#10 0x0813606d in subselect_single_select_engine::prepare (this=0x8c394a8)
    at item_subselect.cc:1186
#11 0x08132c4f in Item_subselect::fix_fields (this=0x8c39408, thd_param=0x8c34ac0,
    tables=0x8c38e00, ref=0x8c39f04) at item_subselect.cc:144
#12 0x08188f0a in setup_conds (thd=0x8c34ac0, tables=0x8c38e00, conds=0x8c39f04)
    at sql_base.cc:2639
#13 0x0818d8bf in JOIN::prepare (this=0x8c39548, rref_pointer_array=0x8c34cf4,
    tables_init=0x8c38e00, wild_num=0, conds_init=0x8c39408, og_num=0, order_init=0x0,
    group_init=0x0, having_init=0x0, proc_param_init=0x0, select_lex_arg=0x8c34bf0,
    unit_arg=0x8c34b08) at sql_select.cc:229
#14 0x08190f63 in mysql_select (thd=0x8c34ac0, rref_pointer_array=0x8c34cf4, tables=0x8c38e00,
    wild_num=0, fields=@0x8c34c58, conds=0x8c39408, og_num=0, order=0x0, group=0x0, having=0x0,
    proc_param=0x0, select_options=8669696, result=0x8c39538, unit=0x8c34b08,
    select_lex=0x8c34bf0) at sql_select.cc:1580
#15 0x0818d63c in handle_select (thd=0x8c34ac0, lex=0x8c34afc, result=0x8c39538)
    at sql_select.cc:193
#16 0x08169ebc in mysql_execute_command (thd=0x8c34ac0) at sql_parse.cc:2046
#17 0x0816eb82 in mysql_parse (thd=0x8c34ac0,
    inBuf=0x8c38d10 "SELECT 1 FROM mysql.user WHERE (SELECT 1) in (SELECT 1)", length=55)
    at sql_parse.cc:4148
#18 0x08168a96 in dispatch_command (command=COM_QUERY, thd=0x8c34ac0,
    packet=0x8c41c89 "SELECT 1 FROM mysql.user WHERE (SELECT 1) in (SELECT 1)", packet_length=56)
    at sql_parse.cc:1507
#19 0x081683b2 in do_command (thd=0x8c34ac0) at sql_parse.cc:1292
#20 0x081678e7 in handle_one_connection (arg=0x8c34ac0) at sql_parse.cc:1024
#21 0xb7e4614b in pthread_start_thread () from /lib/libpthread.so.0
#22 0xb7e461df in pthread_start_thread_event () from /lib/libpthread.so.0
#23 0xb7d7950a in clone () from /lib/libc.so.6
[10 Mar 2005 12:01] Bugs System
A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

[10 Mar 2005 12:04] Oleksandr Byelkin
  1.2189 05/03/10 14:01:22 bell@sanja.is.com.ua +4 -0
  fixed left expression of IN/ALL/ANY subquery transformation support (BUG#8888)
[30 Mar 2005 20:14] Oleksandr Byelkin
Thank you for bugreport. bugfix is pushed into source tree marked as 4.1.11.
[11 Apr 2005 2:13] Paul Dubois
Noted in 4.1.11 changelog.