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  1. MariaDB Server
  2. MDEV-4312

aria: background thread crashes in make_lock_and_pin

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      Description

      During a generic DML stress test of Aria tables, after a while a debug build crashed a few times with the same stack. There is no exact testcase to trigger a problem.

      Version: '5.5.30-MariaDB-debug' Source distribution
      Thread 18:
      Invalid read of size 8
       at: make_lock_and_pin (ma_pagecache.c:2587)
       by: flush_cached_blocks (ma_pagecache.c:4378)
       by: flush_pagecache_blocks_int (ma_pagecache.c:4689)
       by: flush_pagecache_blocks_with_filter (ma_pagecache.c:4805)
       by: ma_checkpoint_background (ma_checkpoint.c:666)
       by: start_thread (pthread_create.c:309)
       by: clone (clone.S:115)
      Address 0x10 is not stack'd, malloc'd or (recently) free'd

      The line of code in question is a DBUG_ASSERT.

      2587      DBUG_ASSERT(block->hash_link->block == block);
      (gdb) p block
      $1 = (PAGECACHE_BLOCK_LINK *) 0x27dbafa0
      (gdb) p block->hash_link
      $2 = (struct st_pagecache_hash_link *) 0x0

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              • Assignee:
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                Reporter:
                sbester1 sbester1
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