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  1. MariaDB Server
  2. MDEV-26537

InnoDB corrupts files due to incorrect st_blksize calculation





      I have a job that migrates an old database to in a different format (my custom, php based forum migrating to a django-based one).

      Recently, I've seen the mariadb server crashing randomly, leaving other databases and their tables corrupted. I can't just pinpoint out the exact issue, but I can provide the traceback and coredump, in hopes of you finding and fixing the bug ASAP.

      This posted crashlog is from executing mariadb-check -c --all-databases -S /tmp/mysql.sock, that according to its output, crashes on a certain CHECK TABLE command.

      The crash log from mysqld.err:
      2021-09-04 11:15:41 0x80f1b5d00 InnoDB: Assertion failure in file /wrkdirs/usr/ports/databases/mariadb105-server/work/mariadb-10.5.
      12/storage/innobase/btr/btr0btr.cc line 4763
      InnoDB: Failing assertion: !page_is_empty(page) || (level == 0 && page_get_page_no(page) == dict_index_get_page(index))
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/
      InnoDB: about forcing recovery.
      210904 11:15:41 [ERROR] mysqld got signal 6 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.

      To report this bug, see https://mariadb.com/kb/en/reporting-bugs

      We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail.

      Server version: 10.5.12-MariaDB
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 11300560 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.

      Thread pointer: 0x81e206b98
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7fffdafdef38 thread_stack 0x49000
      0x130cd7c <my_print_stacktrace+0x3c> at /usr/local/libexec/mariadbd
      0xc6e6af <handle_fatal_signal+0x28f> at /usr/local/libexec/mariadbd
      0x801904e00 <_pthread_sigmask+0x530> at /lib/libthr.so.3

      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x81e24def0): CHECK TABLE `forum_event_eventresponse`

      Connection ID (thread ID): 138
      Status: NOT_KILLED

      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off

      The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains information that should help you find out what is causing the crash.
      Core pattern: %N.core

      Since I couldn't upload the core file here (max filesize exceeded), please download the gzipped coredump from here: https://wetransfer.com/downloads/58bcaac03b364010532ebddd214c7dbd20210904093632/a91858186386ac9749129b6f2632db3520210904093659/8c9aa0


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              marko Marko Mäkelä
              karolyi László Károlyi
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