[Bug 251915] TOCTOU race between tty_signal_sessleader() and killjobc()

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251915

Konstantin Belousov <kib at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib at FreeBSD.org

--- Comment #1 from Konstantin Belousov <kib at FreeBSD.org> ---
Our atomic_load_ptr() guarantees that access occurs at the point where it is
called.  So you can do (p = atomic_load_ptr(&tp->t_session->s_leader)) != NULL
and it cannot be unrolled by the optimizing compiler.

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