[MDEV-34616] ASAN: heap-use-after-free in my_strtod_int - Jira

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Type: Bug
Status: Open (View Workflow)
Priority: Major
Resolution: Unresolved
Affects Version/s: 10.5, 10.6, 10.11, 11.1(EOL), 11.2, 11.4, 11.5(EOL), 11.6
Fix Version/s: 10.5, 10.6, 10.11, 11.2, 11.4
Component/s: Storage Engine - Spider
Labels:
- ASAN
- memory_corruption

Description

Split from ~~MDEV-28345~~ as bar confirmed that - while this Spider testcase leads to a similar but not identical heap-use-after-free as in ~~MDEV-28345~~ - it is a different bug. This issue does not readily reproduce in MTR. Note below note on MDEV-32759.

SET sql_buffer_result=1;

INSTALL PLUGIN Spider SONAME 'ha_spider.so';

CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET '../socket.sock',DATABASE'',USER'',PASSWORD'');

CREATE TABLE t (c INT KEY,c1 BLOB,c2 TEXT) ENGINE=InnoDB;

CREATE TABLE tm (c INT KEY,c1 BLOB,c2 TEXT) ENGINE=InnoDB;

CREATE TABLE t1 (c INT KEY,c1 BLOB,c2 TEXT) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';

CREATE TABLE t2 (c INT KEY,c1 BLOB,c2 TEXT) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "tm"';

INSERT INTO t VALUES (0,1,0),(1,0,0),(2,0,0);

INSERT INTO tm VALUES (0,1,0),(1,0,0),(2,0,0);

SELECT * FROM t1 HAVING c1=(SELECT t.c1 AS c FROM t2 t ORDER BY (SELECT MIN(t1.c1+tt.c1) FROM t2 tt));

Previously led to:

11.0.2 368dd22a816f3b437bccd0b9ff28b9de9b1abf0a (Debug, UBASAN)
==2542380==ERROR: AddressSanitizer: heap-use-after-free on address 0x60800000d8e2 at pc 0x55a6791cb837 bp 0x14a2c640c420 sp 0x14a2c640c410
READ of size 1 at 0x60800000d8e2 thread T34
#0 0x55a6791cb836 in my_strtod_int /test/11.0_dbg_san/strings/dtoa.c:1378
#1 0x55a6791cb836 in my_strtod /test/11.0_dbg_san/strings/dtoa.c:469
#2 0x55a6790d9b3f in my_strntod_8bit /test/11.0_dbg_san/strings/ctype-simple.c:800
#3 0x55a67683d3fa in charset_info_st::strntod(char, unsigned long, char, int) const /test/11.0_dbg_san/include/m_ctype.h:929
#4 0x55a67683d3fa in Value_source::Converter_strntod::Converter_strntod(charset_info_st const, char const, unsigned long) /test/11.0_dbg_san/sql/field.h:210
#5 0x55a67683d3fa in Value_source::Converter_strntod_with_warn::Converter_strntod_with_warn(THD, Value_source::Warn_filter, charset_info_st const, char const*, unsigned long) /test/11.0_dbg_san/sql/field.h:281
#6 0x55a67683d3fa in Field_blob::val_real() /test/11.0_dbg_san/sql/field.cc:8743
#7 0x55a676a17a18 in Item_field::val_real() /test/11.0_dbg_san/sql/item.cc:3354
#8 0x55a676f35ed8 in Item_func_plus::real_op() /test/11.0_dbg_san/sql/item_func.cc:1103
#9 0x55a6760d1826 in Item_func_hybrid_field_type::val_real_from_real_op() /test/11.0_dbg_san/sql/item_func.h:853
#10 0x55a6760d1826 in Type_handler_real_result::Item_func_hybrid_field_type_val_real(Item_func_hybrid_field_type*) const /test/11.0_dbg_san/sql/sql_type.cc:5458
#11 0x55a67517c7d5 in Item_func_hybrid_field_type::val_real() /test/11.0_dbg_san/sql/item_func.h:899
#12 0x55a67495e58a in Item::val_result() /test/11.0_dbg_san/sql/item.h:1792
#13 0x55a6769f2049 in Item_cache_real::cache_value() /test/11.0_dbg_san/sql/item.cc:10396
#14 0x55a67752d7e9 in Item_sum_min::add() /test/11.0_dbg_san/sql/item_sum.cc:2549
#15 0x55a6775a1e61 in Aggregator_simple::add() /test/11.0_dbg_san/sql/item_sum.h:727
#16 0x55a6753d5ac0 in Item_sum::aggregator_add() /test/11.0_dbg_san/sql/item_sum.h:571
#17 0x55a6753d5ac0 in Item_sum::reset_and_add() /test/11.0_dbg_san/sql/item_sum.h:452
#18 0x55a6753d5ac0 in init_sum_functions /test/11.0_dbg_san/sql/sql_select.cc:28582
#19 0x55a6755d34f6 in end_send_group(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:24741
#20 0x55a6753f83ef in evaluate_join_record /test/11.0_dbg_san/sql/sql_select.cc:23485
#21 0x55a6754bf299 in sub_select(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:23252
#22 0x55a67566d164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780
#23 0x55a67566d164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
#24 0x55a67566e916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
#25 0x55a677453105 in subselect_single_select_engine::exec() /test/11.0_dbg_san/sql/item_subselect.cc:4157
#26 0x55a677463617 in Item_subselect::exec() /test/11.0_dbg_san/sql/item_subselect.cc:812
#27 0x55a67743f1ec in Item_singlerow_subselect::val_real() /test/11.0_dbg_san/sql/item_subselect.cc:1441
#28 0x55a67495e58a in Item::val_result() /test/11.0_dbg_san/sql/item.h:1792
#29 0x55a6769f2049 in Item_cache_real::cache_value() /test/11.0_dbg_san/sql/item.cc:10396
#30 0x55a676af47d9 in Item_cache_wrapper::cache() /test/11.0_dbg_san/sql/item.cc:8923
#31 0x55a676af47d9 in Item_cache_wrapper::save_val(Field*) /test/11.0_dbg_san/sql/item.cc:8949
#32 0x55a676b10a25 in Item_cache_wrapper::save_in_result_field(bool) /test/11.0_dbg_san/sql/item.h:5951
#33 0x55a6755a073a in copy_funcs(Item*, THD const) /test/11.0_dbg_san/sql/sql_select.cc:28630
#34 0x55a6755a0a2d in end_write /test/11.0_dbg_san/sql/sql_select.cc:24770
#35 0x55a67560b440 in AGGR_OP::put_record(bool) /test/11.0_dbg_san/sql/sql_select.cc:32019
#36 0x55a67560da5b in AGGR_OP::put_record() /test/11.0_dbg_san/sql/sql_select.h:1152
#37 0x55a67560da5b in sub_select_postjoin_aggr(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:22953
#38 0x55a6753f83ef in evaluate_join_record /test/11.0_dbg_san/sql/sql_select.cc:23485
#39 0x55a6754bf299 in sub_select(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:23252
#40 0x55a67566d164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780
#41 0x55a67566d164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
#42 0x55a67566e916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
#43 0x55a677453105 in subselect_single_select_engine::exec() /test/11.0_dbg_san/sql/item_subselect.cc:4157
#44 0x55a677463617 in Item_subselect::exec() /test/11.0_dbg_san/sql/item_subselect.cc:812
#45 0x55a6774409a4 in Item_singlerow_subselect::val_str(String*) /test/11.0_dbg_san/sql/item_subselect.cc:1484
#46 0x55a67495e7ba in Item::str_result(String*) /test/11.0_dbg_san/sql/item.h:1794
#47 0x55a676a26163 in Item_cache_str::cache_value() /test/11.0_dbg_san/sql/item.cc:10520
#48 0x55a676af7dc7 in Item_cache_wrapper::cache() /test/11.0_dbg_san/sql/item.cc:8923
#49 0x55a676af7dc7 in Item_cache_wrapper::val_str(String*) /test/11.0_dbg_san/sql/item.cc:9031
#50 0x55a676bf4ef7 in Arg_comparator::compare_string() /test/11.0_dbg_san/sql/item_cmpfunc.cc:773
#51 0x55a676c0323e in Arg_comparator::compare() /test/11.0_dbg_san/sql/item_cmpfunc.h:103
#52 0x55a676c0323e in Item_func_eq::val_int() /test/11.0_dbg_san/sql/item_cmpfunc.cc:1776
#53 0x55a67559dfa4 in end_send /test/11.0_dbg_san/sql/sql_select.cc:24493
#54 0x55a6753f83ef in evaluate_join_record /test/11.0_dbg_san/sql/sql_select.cc:23485
#55 0x55a67560ca45 in AGGR_OP::end_send() /test/11.0_dbg_san/sql/sql_select.cc:32100
#56 0x55a67560dfa7 in sub_select_postjoin_aggr(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:22947
#57 0x55a6754bf352 in sub_select(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:23186
#58 0x55a67566d277 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22782
#59 0x55a67566d277 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
#60 0x55a67566e916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
#61 0x55a67565d0c1 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:5158
#62 0x55a67566151c in handle_select(THD, LEX, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
#63 0x55a6751d3a01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
#64 0x55a675234ef5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
#65 0x55a675264973 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
#66 0x55a675274707 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
#67 0x55a675282542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
#68 0x55a675c578b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
#69 0x55a675c58dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
#70 0x14a2eb294b42 in start_thread nptl/pthread_create.c:442
#71 0x14a2eb3269ff (/lib/x86_64-linux-gnu/libc.so.6+0x1269ff)

0x60800000d8e2 is located 66 bytes inside of 96-byte region [0x60800000d8a0,0x60800000d900)
freed by thread T34 here:
#0 0x55a6748e8fe7 in __interceptor_free (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7963fe7)
#1 0x55a679000a61 in my_free /test/11.0_dbg_san/mysys/my_malloc.c:213
#2 0x14a2c5852150 in spider_free_mem(st_spider_transaction, void, unsigned long) /test/11.0_dbg_san/storage/spider/spd_malloc.cc:183
#3 0x14a2c59bcbcb in spider_db_mbase_row::~spider_db_mbase_row() /test/11.0_dbg_san/storage/spider/spd_db_mysql.cc:377
#4 0x14a2c59bccca in spider_db_mbase_row::~spider_db_mbase_row() /test/11.0_dbg_san/storage/spider/spd_db_mysql.cc:380
#5 0x14a2c56cfaf5 in spider_db_free_one_result(st_spider_result_list, st_spider_result) /test/11.0_dbg_san/storage/spider/spd_db_conn.cc:2783
#6 0x14a2c56ec078 in spider_db_seek_next(unsigned char, ha_spider, int, TABLE*) /test/11.0_dbg_san/storage/spider/spd_db_conn.cc:3994
#7 0x14a2c58e33a9 in ha_spider::rnd_next_internal(unsigned char*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:5905
#8 0x14a2c58e9597 in ha_spider::rnd_next(unsigned char*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:5944
#9 0x55a676957c84 in handler::ha_rnd_next(unsigned char*) /test/11.0_dbg_san/sql/handler.cc:3603
#10 0x55a674b28a8b in rr_sequential(READ_RECORD*) /test/11.0_dbg_san/sql/records.cc:514
#11 0x55a6754bff49 in READ_RECORD::read_record() /test/11.0_dbg_san/sql/records.h:81
#12 0x55a6754bff49 in sub_select(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:23269
#13 0x55a67566d164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780
#14 0x55a67566d164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
#15 0x55a67566e916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
#16 0x55a67565d0c1 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:5158
#17 0x55a67566151c in handle_select(THD, LEX, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
#18 0x55a6751d3a01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
#19 0x55a675234ef5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
#20 0x55a675264973 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
#21 0x55a675274707 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
#22 0x55a675282542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
#23 0x55a675c578b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
#24 0x55a675c58dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
#25 0x14a2eb294b42 in start_thread nptl/pthread_create.c:442

previously allocated by thread T34 here:
#0 0x55a6748e9337 in __interceptor_malloc (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7964337)
#1 0x55a679000703 in my_malloc /test/11.0_dbg_san/mysys/my_malloc.c:91
#2 0x14a2c5852583 in spider_bulk_alloc_mem(st_spider_transaction, unsigned int, char const, char const*, unsigned long, unsigned long, ...) /test/11.0_dbg_san/storage/spider/spd_malloc.cc:231
#3 0x14a2c59d329f in spider_db_mbase_row::clone() /test/11.0_dbg_san/storage/spider/spd_db_mysql.cc:547
#4 0x14a2c56dab12 in spider_db_store_result(ha_spider, int, TABLE) /test/11.0_dbg_san/storage/spider/spd_db_conn.cc:3378
#5 0x14a2c58e806f in ha_spider::rnd_next_internal(unsigned char*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:5851
#6 0x14a2c58e9597 in ha_spider::rnd_next(unsigned char*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:5944
#7 0x55a676957c84 in handler::ha_rnd_next(unsigned char*) /test/11.0_dbg_san/sql/handler.cc:3603
#8 0x55a674b28a8b in rr_sequential(READ_RECORD*) /test/11.0_dbg_san/sql/records.cc:514
#9 0x55a67558ed77 in READ_RECORD::read_record() /test/11.0_dbg_san/sql/records.h:81
#10 0x55a67558ed77 in join_init_read_record(st_join_table*) /test/11.0_dbg_san/sql/sql_select.cc:24276
#11 0x55a6754bf115 in sub_select(JOIN, st_join_table, bool) /test/11.0_dbg_san/sql/sql_select.cc:23249
#12 0x55a67566d164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780
#13 0x55a67566d164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
#14 0x55a67566e916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
#15 0x55a67565d0c1 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:5158
#16 0x55a67566151c in handle_select(THD, LEX, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
#17 0x55a6751d3a01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
#18 0x55a675234ef5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
#19 0x55a675264973 in mysql_parse(THD, char, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
#20 0x55a675274707 in dispatch_command(enum_server_command, THD, char, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
#21 0x55a675282542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
#22 0x55a675c578b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
#23 0x55a675c58dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
#24 0x14a2eb294b42 in start_thread nptl/pthread_create.c:442

Thread T34 created by T0 here:
#0 0x55a67488d175 in pthread_create (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7908175)
#1 0x55a67494398b in create_thread_to_handle_connection(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6129
#2 0x55a674950e67 in create_new_thread(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6191
#3 0x55a6749516e7 in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /test/11.0_dbg_san/sql/mysqld.cc:6253
#4 0x55a674952738 in handle_connections_sockets() /test/11.0_dbg_san/sql/mysqld.cc:6377
#5 0x55a674959ee7 in mysqld_main(int, char**) /test/11.0_dbg_san/sql/mysqld.cc:6024
#6 0x55a67492eeca in main /test/11.0_dbg_san/sql/main.cc:34
#7 0x14a2eb229d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58

SUMMARY: AddressSanitizer: heap-use-after-free /test/11.0_dbg_san/strings/dtoa.c:1378 in my_strtod_int
Shadow bytes around the buggy address:
0x0c107fff9ac0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
0x0c107fff9ad0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
0x0c107fff9ae0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
0x0c107fff9af0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x0c107fff9b00: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0c107fff9b10: fa fa fa fa fd fd fd fd fd fd fd fd[fd]fd fd fd
0x0c107fff9b20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c107fff9b30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c107fff9b40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c107fff9b50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c107fff9b60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==2542380==ABORTING

And these UniqueID's/stacks across versions and build types:

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|Value_source::Converter_strntod::Converter_strntod|Value_source::Converter_strntod_with_warn::Converter_strntod_with_warn

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|my_strntod_8bit|Value_source::Converter_strntod::Converter_strntod

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|charset_info_st::strntod|Value_source::Converter_strntod::Converter_strntod

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|my_strntod_8bit|charset_info_st::strntod

However, with newer builds we now (18/7/24) see only these:

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|charset_info_st::strntod|Value_source::Converter_strntod::Converter_strntod

ASAN|heap-use-after-free|strings/dtoa.c|my_strtod_int|my_strtod|my_strntod_8bit|charset_info_st::strntod

Which look like MDEV-32759, however no AVG() is used here.

Attachments

Issue Links

relates to

MDEV-28374 UBSAN: runtime error: signed integer overflow: 10000000000000 * 10000000000000 cannot be represented in type 'long long int' in sql/sql_analyse.cc

Confirmed

MDEV-32759 Heap-Use-After-Free at /mariadb-11.3.0/strings/dtoa.c:1378

Stalled

split from

MDEV-28345 ASAN: use-after-poison or unknown-crash in my_strtod_int from charset_info_st::strntod or test_if_number

Closed

Activity

People

Assignee:: Alexander Barkov

Reporter:: Roel Van de Paar

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Dates

Created:: 2024-07-17 20:03

Updated:: 2024-09-10 15:45

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