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  1. MariaDB Server
  2. MDEV-12420

pcre stack overflow on match

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    Description

      The attached table-free query causes a seg fault in 10.2.4, 10.1.21, and 10.0.21 (and presumably all the others). Setting max_recursive_iterations to various values didn't turn that into a polite error, but according to the documenation, it should have.

      NOTE: setting 'thread_stack=800k' fixes this specific test, so it's definitely a stack issue. Examining a dumpfile showed many recursions of pcre 'match'.

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-13356 10.0.29 crashes on REGEXP with "(.|x)*" on certain conditions

          • Major - Major loss of function.
          • Closed

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              serg Sergei Golubchik
              donlindsay Don Lindsay
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