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  1. MariaDB Server
  2. MDEV-26323

use-after-poison issue of MariaDB server

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      Description

      step to reproduce:

      INSTALL PLUGIN DEALLOCATE SONAME 'x' ;
      

      asan report:

      Version: '10.6.5-MariaDB'  socket: '/tmp/mysql_mar.sock'  port: 3309  Source distribution
      =================================================================
      ==283607==ERROR: AddressSanitizer: use-after-poison on address 0x62b000077306 at pc 0x56165517504e bp 0x7f3e39319c80 sp 0x7f3e39319c70
      READ of size 1 at 0x62b000077306 thread T48
          #0 0x56165517504d in my_strcasecmp_8bit /home/supersix/fuzz/security/MariaDB/server/strings/ctype-simple.c:265
          #1 0x561653282063 in fix_dl_name /home/supersix/fuzz/security/MariaDB/server/sql/sql_plugin.cc:376
          #2 0x561653282063 in plugin_add /home/supersix/fuzz/security/MariaDB/server/sql/sql_plugin.cc:1125
          #3 0x561653293f30 in mysql_install_plugin(THD*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*) /home/supersix/fuzz/security/MariaDB/server/sql/sql_plugin.cc:2270
          #4 0x56165326a1df in mysql_execute_command(THD*, bool) /home/supersix/fuzz/security/MariaDB/server/sql/sql_parse.cc:5899
          #5 0x561653225684 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /home/supersix/fuzz/security/MariaDB/server/sql/sql_parse.cc:8030
          #6 0x56165325b0b3 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /home/supersix/fuzz/security/MariaDB/server/sql/sql_parse.cc:1896
          #7 0x561653260513 in do_command(THD*, bool) /home/supersix/fuzz/security/MariaDB/server/sql/sql_parse.cc:1404
          #8 0x5616537226fc in do_handle_one_connection(CONNECT*, bool) /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1418
          #9 0x561653723e56 in handle_one_connection /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1312
          #10 0x56165456fd2f in pfs_spawn_thread /home/supersix/fuzz/security/MariaDB/server/storage/perfschema/pfs.cc:2201
          #11 0x7f3e5895a608 in start_thread /build/glibc-ZN95T4/glibc-2.31/nptl/pthread_create.c:477
          #12 0x7f3e5852e292 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x122292)
       
      0x62b000077306 is located 262 bytes inside of 24624-byte region [0x62b000077200,0x62b00007d230)
      allocated by thread T48 here:
          #0 0x7f3e58ee5bc8 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10dbc8)
          #1 0x5616550fbc1c in my_malloc /home/supersix/fuzz/security/MariaDB/server/mysys/my_malloc.c:90
          #2 0x5616550e28c8 in reset_root_defaults /home/supersix/fuzz/security/MariaDB/server/mysys/my_alloc.c:148
          #3 0x5616530d2773 in THD::init_for_queries() /home/supersix/fuzz/security/MariaDB/server/sql/sql_class.cc:1406
          #4 0x5616537201ea in prepare_new_connection_state(THD*) /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1240
          #5 0x561653720efa in thd_prepare_connection(THD*) /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1333
          #6 0x561653720efa in thd_prepare_connection(THD*) /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1322
          #7 0x561653722663 in do_handle_one_connection(CONNECT*, bool) /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1408
          #8 0x561653723e56 in handle_one_connection /home/supersix/fuzz/security/MariaDB/server/sql/sql_connect.cc:1312
          #9 0x56165456fd2f in pfs_spawn_thread /home/supersix/fuzz/security/MariaDB/server/storage/perfschema/pfs.cc:2201
          #10 0x7f3e5895a608 in start_thread /build/glibc-ZN95T4/glibc-2.31/nptl/pthread_create.c:477
       
      Thread T48 created by T0 here:
          #0 0x7f3e58e12805 in pthread_create (/lib/x86_64-linux-gnu/libasan.so.5+0x3a805)
          #1 0x56165456ffe2 in my_thread_create /home/supersix/fuzz/security/MariaDB/server/storage/perfschema/my_thread.h:48
          #2 0x56165456ffe2 in pfs_spawn_thread_v1 /home/supersix/fuzz/security/MariaDB/server/storage/perfschema/pfs.cc:2252
          #3 0x561652ef4b48 in inline_mysql_thread_create /home/supersix/fuzz/security/MariaDB/server/include/mysql/psi/mysql_thread.h:1139
          #4 0x561652ef4b48 in create_thread_to_handle_connection(CONNECT*) /home/supersix/fuzz/security/MariaDB/server/sql/mysqld.cc:5922
          #5 0x561652f04235 in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /home/supersix/fuzz/security/MariaDB/server/sql/mysqld.cc:6043
          #6 0x561652f0500e in handle_connections_sockets() /home/supersix/fuzz/security/MariaDB/server/sql/mysqld.cc:6167
          #7 0x561652f0719b in mysqld_main(int, char**) /home/supersix/fuzz/security/MariaDB/server/sql/mysqld.cc:5817
          #8 0x7f3e584330b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
       
      SUMMARY: AddressSanitizer: use-after-poison /home/supersix/fuzz/security/MariaDB/server/strings/ctype-simple.c:265 in my_strcasecmp_8bit
      Shadow bytes around the buggy address:
        0x0c5680006e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
        0x0c5680006e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
        0x0c5680006e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
        0x0c5680006e40: 00 00 00 00 00 00 f7 00 00 00 00 00 00 00 00 00
        0x0c5680006e50: 00 00 00 00 00 00 03 f7 00 00 00 00 05 f7 00 03
      =>0x0c5680006e60:[f7]02 f7 00 00 00 00 00 00 00 f7 f7 f7 f7 f7 f7
        0x0c5680006e70: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
        0x0c5680006e80: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
        0x0c5680006e90: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
        0x0c5680006ea0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
        0x0c5680006eb0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
      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
      ==283607==ABORTING

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              Assignee:
              bar Alexander Barkov
              Reporter:
              yaoguang yaoguang
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                Dates

                Created:
                Updated:
                Resolved:

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