GNU bug report logs - #25624
[PATCH] timeout: Fix signal race in SIGALRM handling

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Pádraig Brady <P <at> draigBrady.com>, Tobias Stoeckmann <tobias <at> stoeckmann.org>, 25624 <at> debbugs.gnu.org
Subject: bug#25624: [PATCH] timeout: Fix signal race in SIGALRM handling
Date: Sun, 5 Feb 2017 10:26:35 -0800

Pádraig Brady wrote:
> In general this is a largely theoretical race right?
> I.E. pids would need to be recycled between the waitpid() and exit()?

Not that theoretical, in the common case of systems with wraparaound PIDs and a 
small PID space. All you need is a long-running child on a busy system.

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