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[Bug 61558] Apache 2.4.27 crashes often when restarting the service. segfault in libdl-2.24.so or apache2


https://bz.apache.org/bugzilla/show_bug.cgi?id=61558

--- Comment #19 from Joe Orton <jorton@xxxxxxxxxx> ---
(In reply to Yann Ylavic from comment #16)
> The pointer is cleared (NULL) with pconf, after which
> ap_unixd_hook_mpm_query() will return DECLINED insteaf of calling the
> registered (and now unloaded) mpm function.

Ah, I see.  Yes, that should work then too.

> Early apr_hook_deregister_all() looks like a simpler (and wider) solution,
> but don't/can't we have legitimate cleanups (i.e. run in time and/or with no
> scope issue) that'd run hooks? If not, I'm all for this!

Since we specifically tie hooks to the pconf lifetime it should be safe,
perhaps correctly it should done as a registered cleanup.

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