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  1. MariaDB Server
  2. MDEV-40534

use-of-uninitialized-value in handler::calculate_checksum()

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Details

    • Can result in hang or crash

    Description

      --source include/have_innodb.inc
      CREATE TABLE t1 (c1 INT,c2 INT GENERATED ALWAYS AS (c1) PERSISTENT,PRIMARY KEY(c1)) ENGINE=InnoDB;
      INSERT INTO t1 (c1) VALUES (1),(2),(3),(4),(5),(6);
      CHECKSUM TABLE t1;
      

      Leads to:

      CS 10.6.28 85ab366da3fc5d13b61d9e491e63e2b62c017cf4 (Optimized, MSAN, Clang 20.1.8-20250804) Build 17/07/2026

      ==3526379==WARNING: MemorySanitizer: use-of-uninitialized-value
          #0 0x5555563282a8 in handler::calculate_checksum() /test/10.6_opt_msan/sql/handler.cc:6035:37
          #1 0x555556f3c99d in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_opt_msan/sql/sql_table.cc:12083:29
          #2 0x555556c3cf31 in mysql_execute_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:4451:11
          #3 0x555556c2fd95 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_opt_msan/sql/sql_parse.cc:8199:18
          #4 0x555556c29e4b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1911:7
          #5 0x555556c30988 in do_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1421:17
          #6 0x5555570c9b0c in do_handle_one_connection(CONNECT*, bool) /test/10.6_opt_msan/sql/sql_connect.cc:1393:11
          #7 0x5555570c9432 in handle_one_connection /test/10.6_opt_msan/sql/sql_connect.cc:1305:5
          #8 0x7fffe689cb83 in start_thread nptl/pthread_create.c:447:8
          #9 0x7fffe6929d6b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
       
        Uninitialized value was stored to memory at
          #0 0x555556328114 in handler::calculate_checksum() /test/10.6_opt_msan/sql/handler.cc:6021:29
          #1 0x555556f3c99d in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_opt_msan/sql/sql_table.cc:12083:29
          #2 0x555556c3cf31 in mysql_execute_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:4451:11
          #3 0x555556c2fd95 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_opt_msan/sql/sql_parse.cc:8199:18
          #4 0x555556c29e4b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1911:7
          #5 0x555556c30988 in do_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1421:17
          #6 0x5555570c9b0c in do_handle_one_connection(CONNECT*, bool) /test/10.6_opt_msan/sql/sql_connect.cc:1393:11
          #7 0x5555570c9432 in handle_one_connection /test/10.6_opt_msan/sql/sql_connect.cc:1305:5
          #8 0x7fffe689cb83 in start_thread nptl/pthread_create.c:447:8
       
        Uninitialized value was stored to memory at
          #0 0x5555563280fc in handler::calculate_checksum() /test/10.6_opt_msan/sql/handler.cc:6019:48
          #1 0x555556f3c99d in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_opt_msan/sql/sql_table.cc:12083:29
          #2 0x555556c3cf31 in mysql_execute_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:4451:11
          #3 0x555556c2fd95 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_opt_msan/sql/sql_parse.cc:8199:18
          #4 0x555556c29e4b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1911:7
          #5 0x555556c30988 in do_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1421:17
          #6 0x5555570c9b0c in do_handle_one_connection(CONNECT*, bool) /test/10.6_opt_msan/sql/sql_connect.cc:1393:11
          #7 0x5555570c9432 in handle_one_connection /test/10.6_opt_msan/sql/sql_connect.cc:1305:5
          #8 0x7fffe689cb83 in start_thread nptl/pthread_create.c:447:8
       
        Uninitialized value was stored to memory at
          #0 0x55555623e34e in __msan_memcpy (/test/MSAN_MD170726-mariadb-10.6.28-linux-x86_64-opt/bin/mariadbd+0xcea34e) (BuildId: c54cd201b0905cfceb6742c33d28a95089229adb)
          #1 0x555557c6a70b in row_sel_dequeue_cached_row_for_mysql(unsigned char*, row_prebuilt_t*) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:3858:3
          #2 0x555557c63573 in row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:4456:4
          #3 0x5555576d2ede in ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int) /test/10.6_opt_msan/storage/innobase/handler/ha_innodb.cc:9319:24
          #4 0x555556317802 in handler::ha_rnd_next(unsigned char*) /test/10.6_opt_msan/sql/handler.cc:3586:5
          #5 0x55555632793f in handler::calculate_checksum() /test/10.6_opt_msan/sql/handler.cc:6012:12
          #6 0x555556f3c99d in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_opt_msan/sql/sql_table.cc:12083:29
          #7 0x555556c3cf31 in mysql_execute_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:4451:11
          #8 0x555556c2fd95 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_opt_msan/sql/sql_parse.cc:8199:18
          #9 0x555556c29e4b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1911:7
          #10 0x555556c30988 in do_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1421:17
          #11 0x5555570c9b0c in do_handle_one_connection(CONNECT*, bool) /test/10.6_opt_msan/sql/sql_connect.cc:1393:11
          #12 0x5555570c9432 in handle_one_connection /test/10.6_opt_msan/sql/sql_connect.cc:1305:5
          #13 0x7fffe689cb83 in start_thread nptl/pthread_create.c:447:8
       
        Memory was marked as uninitialized
          #0 0x555556248f71 in __msan_allocated_memory (/test/MSAN_MD170726-mariadb-10.6.28-linux-x86_64-opt/bin/mariadbd+0xcf4f71) (BuildId: c54cd201b0905cfceb6742c33d28a95089229adb)
          #1 0x555557c5de97 in row_sel_field_store_in_mysql_format_func(unsigned char*, mysql_row_templ_t const*, unsigned char const*, unsigned long) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:2811:2
          #2 0x555557c7dd69 in row_sel_store_mysql_field(unsigned char*, row_prebuilt_t*, unsigned char const*, dict_index_t const*, unsigned short const*, unsigned long, mysql_row_templ_t const*) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:3102:3
          #3 0x555557c6c5fc in row_sel_store_mysql_rec(unsigned char*, row_prebuilt_t*, unsigned char const*, dtuple_t const*, bool, dict_index_t const*, unsigned short const*) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:3238:8
          #4 0x555557c68a09 in row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long) /test/10.6_opt_msan/storage/innobase/row/row0sel.cc:5675:9
          #5 0x5555576d2ede in ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int) /test/10.6_opt_msan/storage/innobase/handler/ha_innodb.cc:9319:24
          #6 0x555556317802 in handler::ha_rnd_next(unsigned char*) /test/10.6_opt_msan/sql/handler.cc:3586:5
          #7 0x55555632793f in handler::calculate_checksum() /test/10.6_opt_msan/sql/handler.cc:6012:12
          #8 0x555556f3c99d in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_opt_msan/sql/sql_table.cc:12083:29
          #9 0x555556c3cf31 in mysql_execute_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:4451:11
          #10 0x555556c2fd95 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_opt_msan/sql/sql_parse.cc:8199:18
          #11 0x555556c29e4b in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1911:7
          #12 0x555556c30988 in do_command(THD*, bool) /test/10.6_opt_msan/sql/sql_parse.cc:1421:17
          #13 0x5555570c9b0c in do_handle_one_connection(CONNECT*, bool) /test/10.6_opt_msan/sql/sql_connect.cc:1393:11
          #14 0x5555570c9432 in handle_one_connection /test/10.6_opt_msan/sql/sql_connect.cc:1305:5
          #15 0x7fffe689cb83 in start_thread nptl/pthread_create.c:447:8
       
      SUMMARY: MemorySanitizer: use-of-uninitialized-value /test/10.6_opt_msan/sql/handler.cc:6035:37 in handler::calculate_checksum()
      

      CS 10.6.28 85ab366da3fc5d13b61d9e491e63e2b62c017cf4 (Debug, MSAN, Clang 20.1.8-20250804) Build 17/07/2026

      ==3526451==WARNING: MemorySanitizer: use-of-uninitialized-value
          #0 0x5b76ba74adff in handler::calculate_checksum() /test/10.6_dbg_msan/sql/handler.cc:6035:37
          #1 0x5b76bb434498 in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_dbg_msan/sql/sql_table.cc:12083:29
          #2 0x5b76bb11910f in mysql_execute_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:4451:11
          #3 0x5b76bb10c2c8 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_dbg_msan/sql/sql_parse.cc:8199:18
          #4 0x5b76bb105cee in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1911:7
          #5 0x5b76bb10cdd4 in do_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1421:17
          #6 0x5b76bb5de1ec in do_handle_one_connection(CONNECT*, bool) /test/10.6_dbg_msan/sql/sql_connect.cc:1393:11
          #7 0x5b76bb5ddaf9 in handle_one_connection /test/10.6_dbg_msan/sql/sql_connect.cc:1305:5
          #8 0x7a7896e9cb83 in start_thread nptl/pthread_create.c:447:8
          #9 0x7a7896f29d6b in clone3 misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
       
        Uninitialized value was stored to memory at
          #0 0x5b76ba74aa93 in handler::calculate_checksum() /test/10.6_dbg_msan/sql/handler.cc:6021:29
          #1 0x5b76bb434498 in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_dbg_msan/sql/sql_table.cc:12083:29
          #2 0x5b76bb11910f in mysql_execute_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:4451:11
          #3 0x5b76bb10c2c8 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_dbg_msan/sql/sql_parse.cc:8199:18
          #4 0x5b76bb105cee in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1911:7
          #5 0x5b76bb10cdd4 in do_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1421:17
          #6 0x5b76bb5de1ec in do_handle_one_connection(CONNECT*, bool) /test/10.6_dbg_msan/sql/sql_connect.cc:1393:11
          #7 0x5b76bb5ddaf9 in handle_one_connection /test/10.6_dbg_msan/sql/sql_connect.cc:1305:5
          #8 0x7a7896e9cb83 in start_thread nptl/pthread_create.c:447:8
       
        Uninitialized value was stored to memory at
          #0 0x5b76ba74aa7b in handler::calculate_checksum() /test/10.6_dbg_msan/sql/handler.cc:6019:48
          #1 0x5b76bb434498 in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_dbg_msan/sql/sql_table.cc:12083:29
          #2 0x5b76bb11910f in mysql_execute_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:4451:11
          #3 0x5b76bb10c2c8 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_dbg_msan/sql/sql_parse.cc:8199:18
          #4 0x5b76bb105cee in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1911:7
          #5 0x5b76bb10cdd4 in do_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1421:17
          #6 0x5b76bb5de1ec in do_handle_one_connection(CONNECT*, bool) /test/10.6_dbg_msan/sql/sql_connect.cc:1393:11
          #7 0x5b76bb5ddaf9 in handle_one_connection /test/10.6_dbg_msan/sql/sql_connect.cc:1305:5
          #8 0x7a7896e9cb83 in start_thread nptl/pthread_create.c:447:8
       
        Uninitialized value was stored to memory at
          #0 0x5b76ba64b57e in __msan_memcpy (/test/MSAN_MD170726-mariadb-10.6.28-linux-x86_64-dbg/bin/mariadbd+0xe4b57e) (BuildId: 4011ad30767736203cf12c5ae5c14a6940a07c5f)
          #1 0x5b76bc39db4d in row_sel_dequeue_cached_row_for_mysql(unsigned char*, row_prebuilt_t*) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:3858:3
          #2 0x5b76bc394f98 in row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:4456:4
          #3 0x5b76bbc0d368 in ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int) /test/10.6_dbg_msan/storage/innobase/handler/ha_innodb.cc:9319:24
          #4 0x5b76ba7353c3 in handler::ha_rnd_next(unsigned char*) /test/10.6_dbg_msan/sql/handler.cc:3586:5
          #5 0x5b76ba74a207 in handler::calculate_checksum() /test/10.6_dbg_msan/sql/handler.cc:6012:12
          #6 0x5b76bb434498 in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_dbg_msan/sql/sql_table.cc:12083:29
          #7 0x5b76bb11910f in mysql_execute_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:4451:11
          #8 0x5b76bb10c2c8 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_dbg_msan/sql/sql_parse.cc:8199:18
          #9 0x5b76bb105cee in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1911:7
          #10 0x5b76bb10cdd4 in do_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1421:17
          #11 0x5b76bb5de1ec in do_handle_one_connection(CONNECT*, bool) /test/10.6_dbg_msan/sql/sql_connect.cc:1393:11
          #12 0x5b76bb5ddaf9 in handle_one_connection /test/10.6_dbg_msan/sql/sql_connect.cc:1305:5
          #13 0x7a7896e9cb83 in start_thread nptl/pthread_create.c:447:8
       
        Memory was marked as uninitialized
          #0 0x5b76ba6561a1 in __msan_allocated_memory (/test/MSAN_MD170726-mariadb-10.6.28-linux-x86_64-dbg/bin/mariadbd+0xe561a1) (BuildId: 4011ad30767736203cf12c5ae5c14a6940a07c5f)
          #1 0x5b76bc38c444 in row_sel_field_store_in_mysql_format_func(unsigned char*, mysql_row_templ_t const*, dict_index_t const*, unsigned long, unsigned char const*, unsigned long) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:2811:2
          #2 0x5b76bc3b7bcf in row_sel_store_mysql_field(unsigned char*, row_prebuilt_t*, unsigned char const*, dict_index_t const*, unsigned short const*, unsigned long, mysql_row_templ_t const*) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:3102:3
          #3 0x5b76bc3a0a65 in row_sel_store_mysql_rec(unsigned char*, row_prebuilt_t*, unsigned char const*, dtuple_t const*, bool, dict_index_t const*, unsigned short const*) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:3238:8
          #4 0x5b76bc39b065 in row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long) /test/10.6_dbg_msan/storage/innobase/row/row0sel.cc:5675:9
          #5 0x5b76bbc0d368 in ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int) /test/10.6_dbg_msan/storage/innobase/handler/ha_innodb.cc:9319:24
          #6 0x5b76ba7353c3 in handler::ha_rnd_next(unsigned char*) /test/10.6_dbg_msan/sql/handler.cc:3586:5
          #7 0x5b76ba74a207 in handler::calculate_checksum() /test/10.6_dbg_msan/sql/handler.cc:6012:12
          #8 0x5b76bb434498 in mysql_checksum_table(THD*, TABLE_LIST*, st_ha_check_opt*) /test/10.6_dbg_msan/sql/sql_table.cc:12083:29
          #9 0x5b76bb11910f in mysql_execute_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:4451:11
          #10 0x5b76bb10c2c8 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.6_dbg_msan/sql/sql_parse.cc:8199:18
          #11 0x5b76bb105cee in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1911:7
          #12 0x5b76bb10cdd4 in do_command(THD*, bool) /test/10.6_dbg_msan/sql/sql_parse.cc:1421:17
          #13 0x5b76bb5de1ec in do_handle_one_connection(CONNECT*, bool) /test/10.6_dbg_msan/sql/sql_connect.cc:1393:11
          #14 0x5b76bb5ddaf9 in handle_one_connection /test/10.6_dbg_msan/sql/sql_connect.cc:1305:5
          #15 0x7a7896e9cb83 in start_thread nptl/pthread_create.c:447:8
       
      SUMMARY: MemorySanitizer: use-of-uninitialized-value /test/10.6_dbg_msan/sql/handler.cc:6035:37 in handler::calculate_checksum()
      

      Setup:

      Compiled with a recent version of Clang and LLVM. Ubuntu instructions for Clang/LLVM 18:
        # Note: It is strongly recommended to uninstall all old Clang & LLVM packages (ref  dpkg --list | grep -iE 'clang|llvm'  and use  apt purge  and  dpkg --purge  to remove the packages), before installing Clang/LLVM 18
           sudo apt install clang llvm-18 llvm-18-linker-tools llvm-18-runtime llvm-18-tools llvm-18-dev libstdc++-14-dev llvm-dev lld-18
      Compiled with: "-DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_C{,XX}_FLAGS='-O2 -march=native -mtune=native'" and:
          -DWITH_MSAN=ON  # Note: WITH_MSAN=ON is auto-ignored when not using clang (MDEV-20377)
      Set before execution:
          export MSAN_OPTIONS=abort_on_error=1:poison_in_dtor=0
      

      MSAN Bug Detection Matrix

          Rel    o/d  Build   Commit                                    UniqueID observed             
      CS  10.6   dbg  170726  85ab366da3fc5d13b61d9e491e63e2b62c017cf4  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      CS  10.6   opt  170726  85ab366da3fc5d13b61d9e491e63e2b62c017cf4  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      CS  10.11  dbg  170726  50faece416f0642b57a515d546f20cefd9062379  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      CS  10.11  opt  170726  50faece416f0642b57a515d546f20cefd9062379  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      CS  11.4   dbg  200726  17fe060a549d2bfa56f6efb82456b20146ac569f  No bug found                  
      CS  11.4   opt  200726  17fe060a549d2bfa56f6efb82456b20146ac569f  No bug found                  
      CS  11.8   dbg  170726  bf58d4cb5fccd4078ec91c065a2de86be3b46281  No bug found                  
      CS  11.8   opt  170726  bf58d4cb5fccd4078ec91c065a2de86be3b46281  No bug found                  
      CS  12.3   dbg  160726  f9d797f1ccb8bbdbad0b50005644f29cd6125a6c  No bug found                  
      CS  12.3   opt  160726  f9d797f1ccb8bbdbad0b50005644f29cd6125a6c  No bug found                  
      CS  13.0   dbg  160726  84c246ca5387c0611f75097136ff4f4bea092aa3  No bug found                  
      CS  13.0   opt  160726  84c246ca5387c0611f75097136ff4f4bea092aa3  No bug found                  
      CS  13.1   dbg  160726  7322a6656a5357b4574b7413493c76ba2fc41f84  No bug found                  
      CS  13.1   opt  160726  7322a6656a5357b4574b7413493c76ba2fc41f84  No bug found                  
      ES  10.6   dbg  170726  fcecb2620f25965723d640decede7c018bcb1dcc  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  10.6   opt  170726  fcecb2620f25965723d640decede7c018bcb1dcc  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  11.4   dbg  170726  3b34189bfe675c18c4ced3ef531d016ea74c76f4  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  11.4   opt  170726  3b34189bfe675c18c4ced3ef531d016ea74c76f4  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  11.8   dbg  170726  4694e931d10fecf733c34f83ea2146d31b708eb3  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  11.8   opt  170726  4694e931d10fecf733c34f83ea2146d31b708eb3  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  12.3   dbg  160726  9d8abb61e913bec023cd8caeccad4b42717151cb  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      ES  12.3   opt  160726  9d8abb61e913bec023cd8caeccad4b42717151cb  MSAN|use-of-uninitialized-value|sql/handler.cc|handler::calculate_checksum|mysql_checksum_table|mysql_execute_command|mysql_parse
      

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            thiru Thirunarayanan Balathandayuthapani
            saahil Saahil Alam
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