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  1. MariaDB Server
  2. MDEV-28747

Possible problem with ha_innobase::build_template

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    Description

      While working on MDEV-27366 a potentially problematic piece of code was found in /storage/innobase/handler/ha_innodb.cc:

                   if ((active_index != MAX_KEY
      		 
      	            && active_index == pushed_idx_cond_keyno)
      		 
      	            || (pushed_rowid_filter && rowid_filter_is_active)) {
      		 
      		       /* Push down an index condition or an end_range check. */
      		 
              ...
      		 
      		if (active_index == pushed_idx_cond_keyno) {
      		 
      			m_prebuilt->idx_cond = this;
      		 
      		}
      		 
      	}

      The last condition satisfies when 

      active_index == pushed_idx_cond_keyno == MAX_KEY

      which doesn't look correct. After fixing MDEV-27366 there is no test case to reproduce this scenario.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-27366 SIGSEGV in handler_index_cond_check on SELECT in connection with rowid_filter setting

          • Critical - Crashes, loss of data, severe memory leak.
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              oleg.smirnov Oleg Smirnov
              oleg.smirnov Oleg Smirnov
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                Updated:
                Resolved:

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