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  1. MariaDB Server
  2. MDEV-15005

ASAN: stack-buffer-overflow in my_strnncollsp_simple

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    • Sprint:
      10.2.14, 10.1.32

      Description

      set names latin1;
      SELECT CONVERT(1, CHAR) IN ('100', 10, '101');
      

      10.1 ASAN 4794e5b091c

      ==15851==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7f58790bc8d0 at pc 0x559a1ea28641 bp 0x7f58790bc840 sp 0x7f58790bc838
      READ of size 1 at 0x7f58790bc8d0 thread T6
          #0 0x559a1ea28640 in my_strnncollsp_simple /data/src/10.1/strings/ctype-simple.c:166
          #1 0x559a1d834758 in sortcmp(String const*, String const*, charset_info_st const*) /data/src/10.1/sql/sql_string.cc:762
          #2 0x559a1dc7ffdd in cmp_item_sort_string::cmp(Item*) /data/src/10.1/sql/item_cmpfunc.h:1321
          #3 0x559a1dc6d319 in Item_func_in::val_int() /data/src/10.1/sql/item_cmpfunc.cc:4444
          #4 0x559a1dbe2cd7 in Item::send(Protocol*, String*) /data/src/10.1/sql/item.cc:6589
          #5 0x559a1d4fd894 in Protocol::send_result_set_row(List<Item>*) /data/src/10.1/sql/protocol.cc:914
          #6 0x559a1d606af5 in select_send::send_data(List<Item>&) /data/src/10.1/sql/sql_class.cc:2844
          #7 0x559a1d7b1ae7 in JOIN::exec_inner() /data/src/10.1/sql/sql_select.cc:2591
          #8 0x559a1d7bae34 in JOIN::exec() /data/src/10.1/sql/sql_select.cc:2512
          #9 0x559a1d7af68d in mysql_select(THD*, Item***, 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/10.1/sql/sql_select.cc:3449
          #10 0x559a1d7afe7b in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.1/sql/sql_select.cc:384
          #11 0x559a1d6826a8 in execute_sqlcom_select /data/src/10.1/sql/sql_parse.cc:5926
          #12 0x559a1d69bfdb in mysql_execute_command(THD*) /data/src/10.1/sql/sql_parse.cc:2976
          #13 0x559a1d6b3548 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /data/src/10.1/sql/sql_parse.cc:7347
          #14 0x559a1d6b9d49 in dispatch_command(enum_server_command, THD*, char*, unsigned int) /data/src/10.1/sql/sql_parse.cc:1477
          #15 0x559a1d6c02fc in do_command(THD*) /data/src/10.1/sql/sql_parse.cc:1106
          #16 0x559a1d962844 in do_handle_one_connection(THD*) /data/src/10.1/sql/sql_connect.cc:1330
          #17 0x559a1d962d55 in handle_one_connection /data/src/10.1/sql/sql_connect.cc:1242
          #18 0x559a1e2278f6 in pfs_spawn_thread /data/src/10.1/storage/perfschema/pfs.cc:1861
          #19 0x7f5885808493 in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7493)
          #20 0x7f5883bc193e in __clone (/lib/x86_64-linux-gnu/libc.so.6+0xe893e)
       
      Address 0x7f58790bc8d0 is located in stack of thread T6 at offset 64 in frame
          #0 0x559a1dc7fdfd in cmp_item_sort_string::cmp(Item*) /data/src/10.1/sql/item_cmpfunc.h:1314
       
        This frame has 2 object(s):
          [32, 64) 'tmp' <== Memory access at offset 64 overflows this variable
          [96, 176) 'buff'
      HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
            (longjmp and C++ exceptions *are* supported)
      Thread T6 created by T0 here:
          #0 0x7f5885a41bba in pthread_create (/usr/lib/x86_64-linux-gnu/libasan.so.1+0x23bba)
          #1 0x559a1e23314d in spawn_thread_v1 /data/src/10.1/storage/perfschema/pfs.cc:1911
       
      SUMMARY: AddressSanitizer: stack-buffer-overflow /data/src/10.1/strings/ctype-simple.c:166 my_strnncollsp_simple
      Shadow bytes around the buggy address:
        0x0feb8f20f8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0feb8f20f8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0feb8f20f8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0feb8f20f8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0feb8f20f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
      =>0x0feb8f20f910: 00 00 f1 f1 f1 f1 00 00 00 00[f2]f2 f2 f2 00 00
        0x0feb8f20f920: 00 00 00 00 00 00 00 00 f4 f4 00 00 00 00 00 00
        0x0feb8f20f930: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        0x0feb8f20f940: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
        0x0feb8f20f950: 00 f4 f4 f4 f3 f3 f3 f3 00 00 00 00 00 00 00 00
        0x0feb8f20f960: 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 f2 f2
      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
      ==15851==ABORTING
      

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              • Assignee:
                bar Alexander Barkov
                Reporter:
                elenst Elena Stepanova
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                • Created:
                  Updated:
                  Resolved: