tree c286e2a53afe4d252f1c7911ff7ff286cac65f7e
parent d35dfe22ced7ae3682b98ab0d66d54cc0f50f6dd
author Maxim Dounin <mdounin@mdounin.ru> 1640383630 +0300
committer Maxim Dounin <mdounin@mdounin.ru> 1640383630 +0300

Core: fixed ngx_pcre_studies cleanup.

If a configuration parsing fails for some reason, ngx_regex_module_init()
is not called, and ngx_pcre_studies remained set despite the fact that
the pool it was allocated from is already freed.  This might result in
a segmentation fault during runtime regular expression compilation, such
as in SSI, for example, in the single process mode, or if a worker process
died and was respawned from a master process in such an inconsistent state.

Fix is to clear ngx_pcre_studies from the pool cleanup handler (which is
anyway used to free JIT-compiled patterns).