[Bug nptl/16657] Lock elision breaks pthread_mutex_destroy

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16657

--- Comment #14 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Rich Felker from comment #13)
> Yes, see comment #5. But if you're asking about security flag, my impression
> was that so far the security flag is only being used where the bug leads
> directly to a security problem more serious than plain DoS.

I was asking about real-world application impact, e.g. "we discovered this bug
because Apache httpd was crashing after processing a certain sequence of
requests" (purely hypothetically speaking).  It's not always easy to draw the
line between a reliability bug which manifests somewhat randomly, and a
denial-of-service vulnerability which can be triggered with some non-negligible
probability (which will approach 1 after a sufficient number of attempts).

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