Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.3(EOL), 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL), 11.0(EOL)
Description
--source include/have_innodb.inc
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--error 0,ER_UNKNOWN_ERROR
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SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES LIMIT ROWS EXAMINED 5; |
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--source include/restart_mysqld.inc |
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10.3 3e564d46 |
==3364408==ERROR: LeakSanitizer: detected memory leaks
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Direct leak of 24 byte(s) in 1 object(s) allocated from:
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#0 0x7f2ad8cd7e8f in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
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#1 0x55cf43204ab8 in rec_copy_prefix_to_buf_old /data/src/10.3/storage/innobase/rem/rem0rec.cc:1854
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#2 0x55cf43204ab8 in rec_copy_prefix_to_buf(unsigned char const*, dict_index_t const*, unsigned long, unsigned char**, unsigned long*) /data/src/10.3/stor
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age/innobase/rem/rem0rec.cc:1888
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#3 0x55cf4344da99 in btr_pcur_store_position(btr_pcur_t*, mtr_t*) /data/src/10.3/storage/innobase/btr/btr0pcur.cc:200
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#4 0x55cf43518ff2 in dict_getnext_system_low /data/src/10.3/storage/innobase/dict/dict0load.cc:313
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#5 0x55cf430ea9d4 in i_s_sys_indexes_fill_table /data/src/10.3/storage/innobase/handler/i_s.cc:5595
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#6 0x55cf425b90bd in get_schema_tables_result(JOIN*, enum_schema_table_state) /data/src/10.3/sql/sql_show.cc:9031
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#7 0x55cf4255cf3b in JOIN::exec_inner() /data/src/10.3/sql/sql_select.cc:4114
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#8 0x55cf4255f839 in JOIN::exec() /data/src/10.3/sql/sql_select.cc:3945
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#9 0x55cf4255fc54 in mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /data/src/10.3/sql/sql_select.cc:4354
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#10 0x55cf425624ff in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.3/sql/sql_select.cc:372
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#11 0x55cf423f2eff in execute_sqlcom_select /data/src/10.3/sql/sql_parse.cc:6339
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#12 0x55cf42418068 in mysql_execute_command(THD*) /data/src/10.3/sql/sql_parse.cc:3870
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#13 0x55cf42420507 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.3/sql/sql_parse.cc:7870
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#14 0x55cf42425049 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.3/sql/sql_parse.cc:1852
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#15 0x55cf4242aded in do_command(THD*) /data/src/10.3/sql/sql_parse.cc:1398
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#16 0x55cf42748cd6 in do_handle_one_connection(CONNECT*) /data/src/10.3/sql/sql_connect.cc:1403
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#17 0x55cf4274953a in handle_one_connection /data/src/10.3/sql/sql_connect.cc:1308
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#18 0x55cf4398f074 in pfs_spawn_thread /data/src/10.3/storage/perfschema/pfs.cc:1869
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#19 0x7f2ad8435ea6 in start_thread nptl/pthread_create.c:477
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The query ends with an error:
mysqltest: At line 3: query 'SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES LIMIT ROWS EXAMINED 5' failed: 1105: Unknown error |
Normally when a query exceeds the given LIMIT ROWS EXAMINED value, it succeeds with an incomplete result and a warning:
SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS LIMIT ROWS EXAMINED 5; |
TABLE_ID NAME POS MTYPE PRTYPE LEN |
Warnings:
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Warning 1931 Query execution was interrupted. The query examined at least 7 rows, which exceeds LIMIT ROWS EXAMINED (5). The query result may be incomplete |
Reproducible on 10.3-10.9. Not reproducible on 10.2.
Attachments
Issue Links
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Activity
SET max_statement_time=0.001; |
SELECT sf.name,sf.pos FROM information_schema.innodb_sys_indexes si JOIN information_schema.innodb_sys_fields sf ON si.index_id=sf.index_id; |
SHUTDOWN;
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On 10.11 now? uses malloc instead of __interceptor_malloc:
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10.11.4 7c9f275ee4cd59212a85827626fbca2615d144d5 |
2023-05-13 13:00:34 0 [Note] /test/UBASAN_MD120523-mariadb-10.11.4-linux-x86_64-opt/bin/mysqld: Shutdown complete
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=================================================================
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==1230304==ERROR: LeakSanitizer: detected memory leaks
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Direct leak of 24 byte(s) in 1 object(s) allocated from:
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#0 0x563166d96ed7 in malloc (/test/UBASAN_MD120523-mariadb-10.11.4-linux-x86_64-opt/bin/mariadbd+0x7a5bed7)
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#1 0x56316a63665b in rec_copy_prefix_to_buf_old /test/10.11_opt_san/storage/innobase/rem/rem0rec.cc:1945
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#2 0x56316a63665b in rec_copy_prefix_to_buf(unsigned char const*, dict_index_t const*, unsigned long, unsigned char**, unsigned long*) /test/10.11_opt_san/storage/innobase/rem/rem0rec.cc:1979
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#3 0x56316aae34e2 in btr_pcur_store_position(btr_pcur_t*, mtr_t*) /test/10.11_opt_san/storage/innobase/btr/btr0pcur.cc:177
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#4 0x56316ac3d9f3 in dict_getnext_system_low /test/10.11_opt_san/storage/innobase/dict/dict0load.cc:202
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#5 0x56316ac3d9f3 in dict_startscan_system(btr_pcur_t*, mtr_t*, dict_table_t*) /test/10.11_opt_san/storage/innobase/dict/dict0load.cc:224
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#6 0x56316ac3d9f3 in dict_startscan_system(btr_pcur_t*, mtr_t*, dict_table_t*) /test/10.11_opt_san/storage/innobase/dict/dict0load.cc:211
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#7 0x56316a356b99 in i_s_sys_indexes_fill_table /test/10.11_opt_san/storage/innobase/handler/i_s.cc:5041
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#8 0x563167b4d895 in get_schema_tables_result(JOIN*, enum_schema_table_state) /test/10.11_opt_san/sql/sql_show.cc:9052
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#9 0x563167a5ac2c in JOIN::exec_inner() /test/10.11_opt_san/sql/sql_select.cc:4797
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#10 0x563167a617d3 in JOIN::exec() /test/10.11_opt_san/sql/sql_select.cc:4618
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#11 0x563167a4f65d in mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /test/10.11_opt_san/sql/sql_select.cc:5098
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#12 0x563167a531c0 in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/10.11_opt_san/sql/sql_select.cc:586
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#13 0x5631675ec260 in execute_sqlcom_select /test/10.11_opt_san/sql/sql_parse.cc:6279
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#14 0x5631676519e3 in mysql_execute_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:3949
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#15 0x563167662562 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.11_opt_san/sql/sql_parse.cc:8017
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#16 0x56316766e5d5 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.11_opt_san/sql/sql_parse.cc:1894
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#17 0x563167679840 in do_command(THD*, bool) /test/10.11_opt_san/sql/sql_parse.cc:1407
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#18 0x563167f6ba8c in do_handle_one_connection(CONNECT*, bool) /test/10.11_opt_san/sql/sql_connect.cc:1416
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#19 0x563167f6e08c in handle_one_connection /test/10.11_opt_san/sql/sql_connect.cc:1318
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#20 0x145c78694b42 in start_thread nptl/pthread_create.c:442
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SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s).
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230513 13:00:34 [ERROR] mysqld got signal 6 ;
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Very sporadic as before.
I think that there are some further memory leaks in other INFORMATION_SCHEMA.INNODB_SYS_ tables. It would be better to cover all those tables in a regression test.
Thank you, the fix looks good to me. Please consider disabling the output of every SELECT…LIMIT ROWS EXAMINED statement that is tested. I can imagine that they may return any amount of rows between 0 and the specified limit.
I ran into this one as well. The following reduced testcase:
SHUTDOWN;Can show the following memory leak:
11.0.2 a79abb6517f2fa68b48e61aa3354a0631e3a63f7 (Debug, UBASAN)
==722769==ERROR: LeakSanitizer: detected memory leaksDirect leak of 24 byte(s) in 1 object(s) allocated from:#0 0x55d90e073337 in __interceptor_malloc (/test/UBASAN_MD250323-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x792a337)#1 0x55d911c81767 in rec_copy_prefix_to_buf_old /test/11.0_dbg_san/storage/innobase/rem/rem0rec.cc:1940#2 0x55d911c81767 in rec_copy_prefix_to_buf(unsigned char const*, dict_index_t const*, unsigned long, unsigned char**, unsigned long*) /test/11.0_dbg_san/storage/innobase/rem/rem0rec.cc:1974#3 0x55d9121195ef in btr_pcur_store_position(btr_pcur_t*, mtr_t*) /test/11.0_dbg_san/storage/innobase/btr/btr0pcur.cc:171#4 0x55d9122ab2bc in dict_getnext_system_low /test/11.0_dbg_san/storage/innobase/dict/dict0load.cc:202#5 0x55d9122b437a in dict_startscan_system(btr_pcur_t*, mtr_t*, dict_table_t*) /test/11.0_dbg_san/storage/innobase/dict/dict0load.cc:224#6 0x55d9119d8ac3 in i_s_sys_indexes_fill_table /test/11.0_dbg_san/storage/innobase/handler/i_s.cc:5027#7 0x55d90ef4a33d in get_schema_tables_result(JOIN*, enum_schema_table_state) /test/11.0_dbg_san/sql/sql_show.cc:9060#8 0x55d90ede64c5 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4852#9 0x55d90edea57a in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4672#10 0x55d90edd8d38 in mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /test/11.0_dbg_san/sql/sql_select.cc:5153#11 0x55d90eddd193 in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:611#12 0x55d90e95c973 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6267#13 0x55d90e9bdcce in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949#14 0x55d90e9ed5e6 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:7999#15 0x55d90e9fd37a in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894#16 0x55d90ea0b17f in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407#17 0x55d90f3cf459 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416#18 0x55d90f3d0974 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318#19 0x155101642b42 in start_thread nptl/pthread_create.c:442SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s).However, it has been challenging to create a reliable reproducer.