[MDEV-26404] A SEGV insql/filesort.cc Created: 2021-08-19  Updated: 2021-08-26  Resolved: 2021-08-26

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: 10.7
Fix Version/s: N/A

Type: Bug Priority: Major
Reporter: Zhiyong Wu Assignee: Unassigned
Resolution: Duplicate Votes: 0
Labels: None
Environment:

Linux version 5.13.0-1-MANJARO (builduser@LEGION) (gcc (GCC) 11.1.0, GNU ld (GNU Binutils) 2.36.1) #1 SMP PREEMPT Mon Jun 7 06:16:10 UTC 2021 x86_64

Issue Links:
Duplicate
duplicates MDEV-25994 Crash with union of my_decimal type i... Closed

 Description   

PoC:

CREATE TABLE v0 ( v2 SET ( 'x' ) DEFAULT 'x' , v1 BIGINT ) ENGINE = MEMORY ROW_FORMAT = COMPRESSED ( SELECT 35268330.000000 AS v3 , 3 ) ;
 
 START TRANSACTION ;
 
 SELECT * FROM v0 WHERE v1 = ( bit_count ( 'x' ) AND 0 ) ;
 
 INSERT INTO v0 SELECT * FROM v0 ;
 
 UPDATE v0 SET v1 = v3 + 52 ORDER BY ( SELECT v3 LIMIT 53 OFFSET 16 ) DESC ;
 
 INSERT INTO v0 SELECT TABLE_NAME FROM v0 . PARTITIONS WHERE v2 = 'x' GROUP BY 'x' BETWEEN 'x' AND 'x' = 'x' ;

Log:

2021-08-16 14:41:38 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
 
2021-08-16 14:41:38 0 [Note] InnoDB: Number of pools: 1
 
2021-08-16 14:41:38 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
 
2021-08-16 14:41:38 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)
 
2021-08-16 14:41:38 0 [Note] InnoDB: Using liburing
 
2021-08-16 14:41:38 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
 
2021-08-16 14:41:38 0 [Note] InnoDB: Completed initialization of buffer pool
 
2021-08-16 14:41:38 0 [Note] InnoDB: 128 rollback segments are active.
 
2021-08-16 14:41:38 0 [Note] InnoDB: Creating shared tablespace for temporary tables
 
2021-08-16 14:41:38 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
 
2021-08-16 14:41:38 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
 
2021-08-16 14:41:38 0 [Note] InnoDB: 10.7.0 started; log sequence number 42161; transaction id 14
 
2021-08-16 14:41:38 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuboat/mariadb-tmp/mysql-default-data/ib_buffer_pool
 
2021-08-16 14:41:38 0 [Note] Plugin 'FEEDBACK' is disabled.
 
2021-08-16 14:41:38 0 [Note] InnoDB: Buffer pool(s) load completed at 210816 14:41:38
 
2021-08-16 14:41:38 0 [Note] Server socket created on IP: '0.0.0.0'.
 
2021-08-16 14:41:38 0 [Note] Server socket created on IP: '::'.
 
2021-08-16 14:41:38 0 [Note] /usr/local/mysql/bin//mysqld: ready for connections.
 
Version: '10.7.0-MariaDB'  socket: '/tmp/0.socket'  port: 3306  Source distribution
 
2021-08-16 14:41:39 0 [Note] /usr/local/mysql/bin//mysqld (initiated by: root[root] @ localhost []): Normal shutdown
 
2021-08-16 14:41:39 0 [Note] InnoDB: FTS optimize thread exiting.
 
2021-08-16 14:41:39 0 [Note] InnoDB: Starting shutdown...
 
2021-08-16 14:41:39 0 [Note] InnoDB: Dumping buffer pool(s) to /home/fuboat/mariadb-tmp/mysql-default-data/ib_buffer_pool
 
2021-08-16 14:41:39 0 [Note] InnoDB: Buffer pool(s) dump completed at 210816 14:41:39
 
2021-08-16 14:41:39 0 [Note] InnoDB: Removed temporary tablespace data file: "./ibtmp1"
 
2021-08-16 14:41:39 0 [Note] InnoDB: Shutdown completed; log sequence number 42173; transaction id 15
 
2021-08-16 14:41:39 0 [Note] /usr/local/mysql/bin//mysqld: Shutdown complete
 
 
 
2021-08-16 14:59:09 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
 
2021-08-16 14:59:09 0 [Note] InnoDB: Number of pools: 1
 
2021-08-16 14:59:09 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions
 
2021-08-16 14:59:09 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)
 
2021-08-16 14:59:09 0 [Note] InnoDB: Using liburing
 
2021-08-16 14:59:09 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
 
2021-08-16 14:59:09 0 [Note] InnoDB: Completed initialization of buffer pool
 
2021-08-16 14:59:19 0 [Note] InnoDB: 128 rollback segments are active.
 
2021-08-16 14:59:19 0 [Note] InnoDB: Creating shared tablespace for temporary tables
 
2021-08-16 14:59:19 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
 
2021-08-16 14:59:19 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
 
2021-08-16 14:59:19 0 [Note] InnoDB: 10.7.0 started; log sequence number 42173; transaction id 14
 
2021-08-16 14:59:19 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuboat/mariadb-tmp/7/ib_buffer_pool
 
2021-08-16 14:59:19 0 [Note] Plugin 'FEEDBACK' is disabled.
 
2021-08-16 14:59:20 0 [Note] Server socket created on IP: '0.0.0.0'.
 
2021-08-16 14:59:20 0 [Note] Server socket created on IP: '::'.
 
2021-08-16 14:59:20 0 [Note] InnoDB: Buffer pool(s) load completed at 210816 14:59:20
 
2021-08-16 14:59:20 0 [Note] /usr/local/mysql/bin//mysqld: ready for connections.
 
Version: '10.7.0-MariaDB'  socket: '/tmp/7.socket'  port: 10007  Source distribution
 
210816 14:59:21 [ERROR] mysqld got signal 11 ;
 
This could be because you hit a bug. It is also possible that this binary
 
or one of the libraries it was linked against is corrupt, improperly built,
 
or misconfigured. This error can also be caused by malfunctioning hardware.
 
 
 
To report this bug, see https://mariadb.com/kb/en/reporting-bugs
 
 
 
We will try our best to scrape up some info that will hopefully help
 
diagnose the problem, but since we have already crashed, 
something is definitely wrong and this may fail.
 
 
 
Server version: 10.7.0-MariaDB
 
key_buffer_size=134217728
 
read_buffer_size=131072
 
max_used_connections=1
 
max_threads=153
 
thread_count=1
 
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467956 K  bytes of memory
 
Hope that's ok; if not, decrease some variables in the equation.
 
 
 
Thread pointer: 0x62b00009a218
 
Attempting backtrace. You can use the following information to find out
 
where mysqld died. If you see no messages after this, something went
 
terribly wrong...
 
stack_bottom = 0x7fe7b413c850 thread_stack 0x5fc00
 
sanitizer_common/sanitizer_common_interceptors.inc:4203(__interceptor_backtrace.part.0)[0x7fe7d39e8c3e]
 
mysys/stacktrace.c:213(my_print_stacktrace)[0x55828594c747]
 
sql/signal_handler.cc:222(handle_fatal_signal)[0x558284914120]
 
sigaction.c:0(__restore_rt)[0x7fe7d33d2870]
 
sql/my_decimal.h:132(my_decimal::operator=(my_decimal const&))[0x558284d7dbca]
 
sql/filesort.cc:1310(Type_handler_decimal_result::make_sort_key_part(unsigned char*, Item*, SORT_FIELD_ATTR const*, Sort_param*) const)[0x558284903c51]
 
sql/filesort.cc:3030(make_sortkey(Sort_param*, unsigned char*, unsigned char*, bool))[0x5582849076a2]
 
sql/filesort.cc:971(filesort(THD*, TABLE*, Filesort*, Filesort_tracker*, JOIN*, unsigned long long))[0x55828490f359]
 
sql/sql_update.cc:796(mysql_update(THD*, TABLE_LIST*, List<Item>&, List<Item>&, Item*, unsigned int, st_order*, unsigned long long, bool, unsigned long long*, unsigned long long*))[0x55828449dfe3]
 
sql/sql_parse.cc:4408(mysql_execute_command(THD*, bool))[0x5582841b274c]
 
sql/sql_parse.cc:8047(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x5582841b95a1]
 
sql/sql_parse.cc:1898(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x5582841bf60c]
 
sql/sql_parse.cc:1406(do_command(THD*, bool))[0x5582841c473d]
 
sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x55828457fe57]
 
sql/sql_connect.cc:1312(handle_one_connection)[0x55828458033d]
 
perfschema/pfs.cc:2204(pfs_spawn_thread)[0x558285010c2c]
 
pthread_create.c:0(start_thread)[0x7fe7d33c8259]
 
:0(__GI___clone)[0x7fe7d2f735e3]
 
 
 
Trying to get some variables.
 
Some pointers may be invalid and cause the dump to abort.
 
Query (0x629000087238): UPDATE v0 SET v1 = v3 + 52 ORDER BY ( SELECT v3 LIMIT 53 OFFSET 16 ) DESC
 
 
 
Connection ID (thread ID): 4
 
Status: NOT_KILLED
 
 
 
Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off
 
 
 
The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
 
information that should help you find out what is causing the crash.
 
Writing a core file...
 
Working directory at /home/fuboat/mariadb-tmp/7
 
Resource Limits:
 
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        unlimited            unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             61608                61608                processes 
Max open files            524288               524288               files     
Max locked memory         65536                65536                bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       61608                61608                signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us        
Core pattern: core

Coredump:

GNU gdb (GDB) 10.2
 
Copyright (C) 2021 Free Software Foundation, Inc.
 
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 
This is free software: you are free to change and redistribute it.
 
There is NO WARRANTY, to the extent permitted by law.
 
Type "show copying" and "show warranty" for details.
 
This GDB was configured as "x86_64-pc-linux-gnu".
 
Type "show configuration" for configuration details.
 
For bug reporting instructions, please see:
 
<https://www.gnu.org/software/gdb/bugs/>.
 
Find the GDB manual and other documentation resources online at:
 
    <http://www.gnu.org/software/gdb/documentation/>.
 
 
 
For help, type "help".
 
Type "apropos word" to search for commands related to "word"...
 
Reading symbols from /usr/local/mysql/bin//mysqld...
 
[New LWP 38066]
 
[New LWP 4188150]
 
[New LWP 4188018]
 
[New LWP 4188144]
 
[New LWP 4188187]
 
[New LWP 33090]
 
[New LWP 35083]
 
[New LWP 4186805]
 
[New LWP 35088]
 
[New LWP 33069]
 
[New LWP 35067]
 
[New LWP 35068]
 
[New LWP 35069]
 
[New LWP 37887]
 
[Thread debugging using libthread_db enabled]
 
Using host libthread_db library "/usr/lib/libthread_db.so.1".
 
Core was generated by `/usr/local/mysql/bin//mysqld --port 10007 --datadir=/home/fuboat/mariadb-tmp/7'.
 
Program terminated with signal SIGSEGV, Segmentation fault.
 
#0  0x00007fe7d33cf808 in pthread_kill () from /usr/lib/libpthread.so.0
 
[Current thread is 1 (Thread 0x7fe7b413d240 (LWP 38066))]
 
(gdb) (gdb) #0  0x00007fe7d33cf808 in pthread_kill () from /usr/lib/libpthread.so.0
 
#1  0x000055828491406b in handle_fatal_signal (sig=<optimized out>) at /experiment/mariadb-server/sql/signal_handler.cc:344
 
#2  <signal handler called>
 
#3  0x0000558284d7dbca in my_decimal::operator= (rhs=..., this=0x7fe7b4139590) at /experiment/mariadb-server/sql/my_decimal.h:132
 
#4  my_decimal2decimal (to=0x7fe7b4139590, from=0x0) at /experiment/mariadb-server/sql/my_decimal.h:353
 
#5  my_decimal::to_binary (this=0x0, bin=bin@entry=0x613000020498 '\276' <repeats 200 times>..., prec=<optimized out>, scale=<optimized out>, mask=mask@entry=30) at /experiment/mariadb-server/sql/my_decimal.cc:206
 
#6  0x0000558284903c51 in Type_handler_decimal_result::make_sort_key_part (this=<optimized out>, to=0x613000020498 '\276' <repeats 200 times>..., item=0x629000088dd0, sort_field=<optimized out>, param=<optimized out>) at /experiment/mariadb-server/sql/filesort.cc:1321
 
#7  0x00005582849076a2 in make_sortkey (to=0x613000020498 '\276' <repeats 200 times>..., param=0x7fe7b4139ab0) at /experiment/mariadb-server/sql/filesort.cc:3027
 
#8  make_sortkey (param=param@entry=0x7fe7b4139ab0, to=0x613000020498 '\276' <repeats 200 times>..., ref_pos=ref_pos@entry=0x619000083308 "\030\b", using_packed_sortkeys=using_packed_sortkeys@entry=false) at /experiment/mariadb-server/sql/filesort.cc:1354
 
#9  0x000055828490f359 in find_all_keys (found_rows=0x613000020430, pq=0x0, tempfile=0x7fe7b4139bb0, buffpek_pointers=0x7fe7b4139ce0, fs_info=0x6130000202c0, select=0x0, param=0x7fe7b4139ab0, thd=0x62b00009a218) at /experiment/mariadb-server/sql/filesort.cc:969
 
#10 filesort (thd=thd@entry=0x62b00009a218, table=table@entry=0x619000082a98, filesort=filesort@entry=0x7fe7b413a250, tracker=<optimized out>, join=join@entry=0x0, first_table_bit=first_table_bit@entry=0) at /experiment/mariadb-server/sql/filesort.cc:357
 
#11 0x000055828449dfe3 in mysql_update (thd=thd@entry=0x62b00009a218, table_list=<optimized out>, fields=..., values=..., conds=<optimized out>, order_num=<optimized out>, order=0x629000088fd0, limit=18446744073709551615, ignore=<optimized out>, found_return=<optimized out>, updated_return=<optimized out>)
 
    at /experiment/mariadb-server/sql/sql_update.cc:796
 
#12 0x00005582841b274c in mysql_execute_command (thd=0x62b00009a218, is_called_from_prepared_stmt=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:4408
 
#13 0x00005582841b95a1 in mysql_parse (thd=0x62b00009a218, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:8030
 
#14 0x00005582841bf60c in dispatch_command (command=<optimized out>, thd=0x62b00009a218, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:1896
 
#15 0x00005582841c473d in do_command (thd=0x62b00009a218, blocking=blocking@entry=true) at /experiment/mariadb-server/sql/sql_parse.cc:1404
 
#16 0x000055828457fe57 in do_handle_one_connection (connect=<optimized out>, put_in_cache=<optimized out>) at /experiment/mariadb-server/sql/sql_connect.cc:1418
 
#17 0x000055828458033d in handle_one_connection (arg=arg@entry=0x6080000023b8) at /experiment/mariadb-server/sql/sql_connect.cc:1312
 
#18 0x0000558285010c2c in pfs_spawn_thread (arg=0x617000005f18) at /experiment/mariadb-server/storage/perfschema/pfs.cc:2201
 
#19 0x00007fe7d33c8259 in start_thread () from /usr/lib/libpthread.so.0
 
#20 0x00007fe7d2f735e3 in clone () from /usr/lib/libc.so.6
 
(gdb) quit


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