ASAN heap-use-after-free in my_strnncollsp_simple

--source include/have_partition.inc

CREATE TABLE t1 (

  pk INT PRIMARY KEY,

  b BLOB,

  vb TEXT AS (b) VIRTUAL,

  d INT,

  vd INT AS (d),

 KEY(d)

) PARTITION BY KEY() PARTITIONS 6;

INSERT IGNORE INTO t1 (pk,b,d) VALUES

  (1,'1',0),(2,'2',1),(3,'3',2),(4,'4',3),(5,'5',4),(6,'6',5),

  (7,'7',6),(8,NULL,NULL),(9,'8',7),(10,NULL,8);

SELECT * FROM t1 WHERE vb != 'foo' AND d > 0 ORDER BY vd;

# Cleanup

DROP TABLE t1;

==12275==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c000027a70 at pc 0x55b956334db2 bp 0x7fba36490530 sp 0x7fba36490528

READ of size 1 at 0x60c000027a70 thread T5

    #0 0x55b956334db1 in my_strnncollsp_simple /data/src/10.2/strings/ctype-simple.c:182

    #1 0x55b954e3abce in sortcmp(String const*, String const*, charset_info_st const*) /data/src/10.2/sql/sql_string.cc:804

    #2 0x55b9552f1c7d in Arg_comparator::compare_string() /data/src/10.2/sql/item_cmpfunc.cc:816

    #3 0x55b95532cdba in Arg_comparator::compare() /data/src/10.2/sql/item_cmpfunc.h:87

    #4 0x55b9552fd13f in Item_func_ne::val_int() /data/src/10.2/sql/item_cmpfunc.cc:1805

    #5 0x55b955281932 in Item::val_bool() /data/src/10.2/sql/item.cc:112

    #6 0x55b95531b8cc in Item_cond_and::val_int() /data/src/10.2/sql/item_cmpfunc.cc:5048

    #7 0x55b954ec1f08 in SQL_SELECT::skip_record(THD*) /data/src/10.2/sql/opt_range.h:1632

    #8 0x55b955242c31 in find_all_keys /data/src/10.2/sql/filesort.cc:835

    #9 0x55b95523f045 in filesort(THD*, TABLE*, Filesort*, Filesort_tracker*, JOIN*, unsigned long long) /data/src/10.2/sql/filesort.cc:279

    #10 0x55b954d84ba8 in create_sort_index(THD*, JOIN*, st_join_table*, Filesort*) /data/src/10.2/sql/sql_select.cc:21913

    #11 0x55b954d75d78 in st_join_table::sort_table() /data/src/10.2/sql/sql_select.cc:19729

    #12 0x55b954d75396 in join_init_read_record(st_join_table*) /data/src/10.2/sql/sql_select.cc:19670

    #13 0x55b954d6eac7 in sub_select(JOIN*, st_join_table*, bool) /data/src/10.2/sql/sql_select.cc:18761

    #14 0x55b954d6cfd2 in do_select /data/src/10.2/sql/sql_select.cc:18308

    #15 0x55b954d0d208 in JOIN::exec_inner() /data/src/10.2/sql/sql_select.cc:3623

    #16 0x55b954d0ae9d in JOIN::exec() /data/src/10.2/sql/sql_select.cc:3418

    #17 0x55b954d0e285 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/10.2/sql/sql_select.cc:3818

    #18 0x55b954ced260 in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.2/sql/sql_select.cc:376

    #19 0x55b954c6fed2 in execute_sqlcom_select /data/src/10.2/sql/sql_parse.cc:6481

    #20 0x55b954c5cbbb in mysql_execute_command(THD*) /data/src/10.2/sql/sql_parse.cc:3487

    #21 0x55b954c78bbd in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.2/sql/sql_parse.cc:8015

    #22 0x55b954c535aa in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.2/sql/sql_parse.cc:1826

    #23 0x55b954c5063f in do_command(THD*) /data/src/10.2/sql/sql_parse.cc:1379

    #24 0x55b954f97034 in do_handle_one_connection(CONNECT*) /data/src/10.2/sql/sql_connect.cc:1335

    #25 0x55b954f96a49 in handle_one_connection /data/src/10.2/sql/sql_connect.cc:1241

    #26 0x55b9559b40db in pfs_spawn_thread /data/src/10.2/storage/perfschema/pfs.cc:1862

    #27 0x7fba42906493 in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7493)

    #28 0x7fba40cec93e in __clone (/lib/x86_64-linux-gnu/libc.so.6+0xe893e)

0x60c000027a70 is located 112 bytes inside of 124-byte region [0x60c000027a00,0x60c000027a7c)

freed by thread T5 here:

    #0 0x7fba42b70527 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.1+0x54527)

    #1 0x55b9562d5043 in free_memory /data/src/10.2/mysys/safemalloc.c:279

    #2 0x55b9562d4649 in sf_free /data/src/10.2/mysys/safemalloc.c:197

    #3 0x55b9562a38d8 in my_free /data/src/10.2/mysys/my_malloc.c:217

    #4 0x55b954a6f7f7 in String::free() /data/src/10.2/sql/sql_string.h:351

    #5 0x55b954aaeebe in String::set(char const*, unsigned int, charset_info_st const*) /data/src/10.2/sql/sql_string.h:274

    #6 0x55b95520fcdb in Field_blob::val_str(String*, String*) /data/src/10.2/sql/field.cc:8128

    #7 0x55b954a92c1f in Field::val_str(String*) /data/src/10.2/sql/field.h:866

    #8 0x55b95522ea7c in Field_blob::store_field(Field*) (/data/bld/10.2-asan/bin/mysqld+0x1254a7c)

    #9 0x55b95523cb2d in field_conv_incompatible /data/src/10.2/sql/field_conv.cc:831

    #10 0x55b95523cbca in field_conv(Field*, Field*) /data/src/10.2/sql/field_conv.cc:844

    #11 0x55b9552b00c8 in save_field_in_field /data/src/10.2/sql/item.cc:6257

    #12 0x55b9552b05c4 in Item_field::save_in_field(Field*, bool) /data/src/10.2/sql/item.cc:6303

    #13 0x55b954f0abac in TABLE::update_virtual_fields(handler*, enum_vcol_update_mode) /data/src/10.2/sql/table.cc:7640

    #14 0x55b95525f73c in handler::ha_index_read_map(unsigned char*, unsigned char const*, unsigned long, ha_rkey_function) /data/src/10.2/sql/handler.cc:2684

    #15 0x55b955270868 in handler::read_range_first(st_key_range const*, st_key_range const*, bool, bool) /data/src/10.2/sql/handler.cc:5378

    #16 0x55b956223291 in ha_partition::handle_ordered_index_scan(unsigned char*, bool) /data/src/10.2/sql/ha_partition.cc:6181

    #17 0x55b95621f24c in ha_partition::common_index_read(unsigned char*, bool) /data/src/10.2/sql/ha_partition.cc:5527

    #18 0x55b956220a6d in ha_partition::read_range_first(st_key_range const*, st_key_range const*, bool, bool) /data/src/10.2/sql/ha_partition.cc:5810

    #19 0x55b955033dd8 in handler::multi_range_read_next(void**) /data/src/10.2/sql/multi_range_read.cc:303

    #20 0x55b9555ae616 in QUICK_RANGE_SELECT::get_next() /data/src/10.2/sql/opt_range.cc:11445

    #21 0x55b9552426e6 in find_all_keys /data/src/10.2/sql/filesort.cc:781

    #22 0x55b95523f045 in filesort(THD*, TABLE*, Filesort*, Filesort_tracker*, JOIN*, unsigned long long) /data/src/10.2/sql/filesort.cc:279

    #23 0x55b954d84ba8 in create_sort_index(THD*, JOIN*, st_join_table*, Filesort*) /data/src/10.2/sql/sql_select.cc:21913

    #24 0x55b954d75d78 in st_join_table::sort_table() /data/src/10.2/sql/sql_select.cc:19729

    #25 0x55b954d75396 in join_init_read_record(st_join_table*) /data/src/10.2/sql/sql_select.cc:19670

    #26 0x55b954d6eac7 in sub_select(JOIN*, st_join_table*, bool) /data/src/10.2/sql/sql_select.cc:18761

    #27 0x55b954d6cfd2 in do_select /data/src/10.2/sql/sql_select.cc:18308

    #28 0x55b954d0d208 in JOIN::exec_inner() /data/src/10.2/sql/sql_select.cc:3623

    #29 0x55b954d0ae9d in JOIN::exec() /data/src/10.2/sql/sql_select.cc:3418

previously allocated by thread T5 here:

    #0 0x7fba42b7073f in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.1+0x5473f)

    #1 0x55b9562d3db9 in sf_malloc /data/src/10.2/mysys/safemalloc.c:118

    #2 0x55b9562a3010 in my_malloc /data/src/10.2/mysys/my_malloc.c:101

    #3 0x55b954e3568b in String::realloc_raw(unsigned long) /data/src/10.2/sql/sql_string.cc:102

    #4 0x55b954a6f91e in String::realloc(unsigned long) /data/src/10.2/sql/sql_string.h:367

    #5 0x55b954e35f6b in String::copy() /data/src/10.2/sql/sql_string.cc:158

    #6 0x55b95522eb85 in Field_blob::store_field(Field*) (/data/bld/10.2-asan/bin/mysqld+0x1254b85)

    #7 0x55b95523cb2d in field_conv_incompatible /data/src/10.2/sql/field_conv.cc:831

    #8 0x55b95523cbca in field_conv(Field*, Field*) /data/src/10.2/sql/field_conv.cc:844

    #9 0x55b9552b00c8 in save_field_in_field /data/src/10.2/sql/item.cc:6257

    #10 0x55b9552b05c4 in Item_field::save_in_field(Field*, bool) /data/src/10.2/sql/item.cc:6303

    #11 0x55b954f0abac in TABLE::update_virtual_fields(handler*, enum_vcol_update_mode) /data/src/10.2/sql/table.cc:7640

    #12 0x55b95525f73c in handler::ha_index_read_map(unsigned char*, unsigned char const*, unsigned long, ha_rkey_function) /data/src/10.2/sql/handler.cc:2684

    #13 0x55b955270868 in handler::read_range_first(st_key_range const*, st_key_range const*, bool, bool) /data/src/10.2/sql/handler.cc:5378

    #14 0x55b956223291 in ha_partition::handle_ordered_index_scan(unsigned char*, bool) /data/src/10.2/sql/ha_partition.cc:6181

    #15 0x55b95621f24c in ha_partition::common_index_read(unsigned char*, bool) /data/src/10.2/sql/ha_partition.cc:5527

    #16 0x55b956220a6d in ha_partition::read_range_first(st_key_range const*, st_key_range const*, bool, bool) /data/src/10.2/sql/ha_partition.cc:5810

    #17 0x55b955033dd8 in handler::multi_range_read_next(void**) /data/src/10.2/sql/multi_range_read.cc:303

    #18 0x55b9555ae616 in QUICK_RANGE_SELECT::get_next() /data/src/10.2/sql/opt_range.cc:11445

    #19 0x55b9552426e6 in find_all_keys /data/src/10.2/sql/filesort.cc:781

    #20 0x55b95523f045 in filesort(THD*, TABLE*, Filesort*, Filesort_tracker*, JOIN*, unsigned long long) /data/src/10.2/sql/filesort.cc:279

    #21 0x55b954d84ba8 in create_sort_index(THD*, JOIN*, st_join_table*, Filesort*) /data/src/10.2/sql/sql_select.cc:21913

    #22 0x55b954d75d78 in st_join_table::sort_table() /data/src/10.2/sql/sql_select.cc:19729

    #23 0x55b954d75396 in join_init_read_record(st_join_table*) /data/src/10.2/sql/sql_select.cc:19670

    #24 0x55b954d6eac7 in sub_select(JOIN*, st_join_table*, bool) /data/src/10.2/sql/sql_select.cc:18761

    #25 0x55b954d6cfd2 in do_select /data/src/10.2/sql/sql_select.cc:18308

    #26 0x55b954d0d208 in JOIN::exec_inner() /data/src/10.2/sql/sql_select.cc:3623

    #27 0x55b954d0ae9d in JOIN::exec() /data/src/10.2/sql/sql_select.cc:3418

    #28 0x55b954d0e285 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/10.2/sql/sql_select.cc:3818

    #29 0x55b954ced260 in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.2/sql/sql_select.cc:376

Thread T5 created by T0 here:

    #0 0x7fba42b3fbba in pthread_create (/usr/lib/x86_64-linux-gnu/libasan.so.1+0x23bba)

    #1 0x55b9559b46a3 in spawn_thread_v1 /data/src/10.2/storage/perfschema/pfs.cc:1912

    #2 0x55b954a4ce7e in inline_mysql_thread_create /data/src/10.2/include/mysql/psi/mysql_thread.h:1239

    #3 0x55b954a61e1b in create_thread_to_handle_connection(CONNECT*) /data/src/10.2/sql/mysqld.cc:6466

    #4 0x55b954a62520 in create_new_thread /data/src/10.2/sql/mysqld.cc:6536

    #5 0x55b954a63537 in handle_connections_sockets() /data/src/10.2/sql/mysqld.cc:6811

    #6 0x55b954a61370 in mysqld_main(int, char**) /data/src/10.2/sql/mysqld.cc:6085

    #7 0x55b954a4b21f in main /data/src/10.2/sql/main.cc:25

    #8 0x7fba40c242b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

SUMMARY: AddressSanitizer: heap-use-after-free /data/src/10.2/strings/ctype-simple.c:182 my_strnncollsp_simple

Shadow bytes around the buggy address:

  0x0c187fffcef0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00

  0x0c187fffcf00: 00 00 00 00 00 00 00 04 fa fa fa fa fa fa fa fa

  0x0c187fffcf10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04

  0x0c187fffcf20: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd

  0x0c187fffcf30: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa

=>0x0c187fffcf40: fd fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd

  0x0c187fffcf50: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd

  0x0c187fffcf60: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa

  0x0c187fffcf70: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd

  0x0c187fffcf80: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00

  0x0c187fffcf90: 00 00 00 00 00 00 00 04 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

  Heap right redzone:      fb

  Freed heap region:       fd

  Stack left redzone:      f1

  Stack mid redzone:       f2

  Stack right redzone:     f3

  Stack partial redzone:   f4

  Stack after return:      f5

  Stack use after scope:   f8

  Global redzone:          f9

  Global init order:       f6

  Poisoned by user:        f7

  Contiguous container OOB:fc

  ASan internal:           fe

==12275==ABORTING