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  1. MariaDB Server
  2. MDEV-17005

ASAN heap-use-after-free in innobase_get_computed_value




      10.2 05153a670de6ee

      ==10706==ERROR: AddressSanitizer: heap-use-after-free on address 0x6230001712ec at pc 0x5568429cf673 bp 0x7f55d3e2fc30 sp 0x7f55d3e2fc28
      READ of size 5 at 0x6230001712ec thread T33
          #0 0x5568429cf672 in innobase_get_computed_value(dtuple_t const*, dict_v_col_t const*, dict_index_t const*, mem_block_info_t**, mem_block_info_t*, dict_field_t const*, THD*, TABLE*, unsigned char*, dict_table_t const*, upd_t*, dict_foreign_t*) /data/src/10.2/storage/innobase/handler/ha_innodb.cc:22078
          #1 0x556842c946ad in row_upd_store_v_row /data/src/10.2/storage/innobase/row/row0upd.cc:2188
          #2 0x556842c94c84 in row_upd_store_row(upd_node_t*, THD*, TABLE*) /data/src/10.2/storage/innobase/row/row0upd.cc:2252
          #3 0x556842c98727 in row_upd_del_mark_clust_rec /data/src/10.2/storage/innobase/row/row0upd.cc:2975
          #4 0x556842c99574 in row_upd_clust_step /data/src/10.2/storage/innobase/row/row0upd.cc:3158
          #5 0x556842c9a015 in row_upd /data/src/10.2/storage/innobase/row/row0upd.cc:3279
          #6 0x556842c9ad2e in row_upd_step(que_thr_t*) /data/src/10.2/storage/innobase/row/row0upd.cc:3425
          #7 0x556842bf493d in row_update_for_mysql(row_prebuilt_t*) /data/src/10.2/storage/innobase/row/row0mysql.cc:1829
          #8 0x55684299ba67 in ha_innobase::delete_row(unsigned char const*) /data/src/10.2/storage/innobase/handler/ha_innodb.cc:9228
          #9 0x5568422110e4 in handler::ha_delete_row(unsigned char const*) /data/src/10.2/sql/handler.cc:6019
          #10 0x556841bb0f2e in write_record(THD*, TABLE*, st_copy_info*) /data/src/10.2/sql/sql_insert.cc:1893
          #11 0x5568425f5664 in read_sep_field /data/src/10.2/sql/sql_load.cc:1256
          #12 0x5568425f1458 in mysql_load(THD*, sql_exchange*, TABLE_LIST*, List<Item>&, List<Item>&, List<Item>&, enum_duplicates, bool, bool) /data/src/10.2/sql/sql_load.cc:649
          #13 0x556841c1113f in mysql_execute_command(THD*) /data/src/10.2/sql/sql_parse.cc:4833
          #14 0x556841c25139 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.2/sql/sql_parse.cc:8009
          #15 0x556841bffd20 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.2/sql/sql_parse.cc:1824
          #16 0x556841bfcdc4 in do_command(THD*) /data/src/10.2/sql/sql_parse.cc:1378
          #17 0x556841f3f825 in do_handle_one_connection(CONNECT*) /data/src/10.2/sql/sql_connect.cc:1335
          #18 0x556841f3f23a in handle_one_connection /data/src/10.2/sql/sql_connect.cc:1241
          #19 0x7f55f4bc9493 in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x7493)
          #20 0x7f55f2faf93e in __clone (/lib/x86_64-linux-gnu/libc.so.6+0xe893e)
      ==10706==AddressSanitizer: while reporting a bug found another one.Ignoring.

      To reproduce:

      git clone https://github.com/elenst/rqg --branch mdev17005 rqg-mdev17005
      cd rqg-mdev17005
      perl ./runall-new.pl --basedir=/data/bld/10.2-asan --vardir=/dev/shm/vardir --duration=350 --threads=4  --grammar=mdev17005.yy --skip-gendata --gendata-advanced --vcols


      • Don't forget to change the basedir value.
      • The grammar is quite big and could definitely use some automatic simplification, but I'm not sure it's necessary, possibly the problem will be obvious right away.
      • Reproducible on 10.2 and 10.3. On 10.0 and 10.1 I hit MDEV-17004 instead.
      • The test reproduces the problem for me almost every time, but sometimes it misses the mark. Just run it again. You can also use this command line to run the same test a desired number of times:

        perl ./runall-trials.pl --trials=10 --basedir=/data/bld/10.2-asan --vardir=/dev/shm/vardir --duration=350 --threads=4  --grammar=mdev17005.yy --skip-gendata --gendata-advanced --vcols

        runall-new.pl is replaced by runall-trials.pl --trials=N, all other options are the same. It will stop when the test fails for the first time.


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              nikitamalyavin Nikita Malyavin
              elenst Elena Stepanova
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