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From: Szabolcs Nagy <nsz@port70.net>
To: Rich Felker <dalias@libc.org>
Cc: musl@lists.openwall.com
Subject: Re: [musl] bug: sem_close always unmaps semaphore regardless of ref count
Date: Wed, 28 Oct 2020 23:01:46 +0100	[thread overview]
Message-ID: <20201028220146.GY2947641@port70.net> (raw)
In-Reply-To: <20201028201815.GI534@brightrain.aerifal.cx>

* Rich Felker <dalias@libc.org> [2020-10-28 16:18:16 -0400]:
> On Wed, Oct 28, 2020 at 04:11:05PM -0400, Rich Felker wrote:
> > I found this while reading the code during review of lock usage for
> > MT-fork. Test case attached (can be adapted for libc-test regression
> > tests, I think, or improved to be a conformance test).
> > 
> > Rich
> 
> > #include <semaphore.h>
> > 
> > int main()
> > {
> > 	char buf[] = "mysemXXXXXX";
> > 	if (!mktemp(buf)) return 1;
> > 	sem_t *sem = sem_open(buf, O_CREAT|O_EXCL, 0600);
> > 	sem_open(buf, 0);
> > 	sem_unlink(buf);
> > 	sem_close(sem);
> > 	sem_post(sem);
> > }
> 
> Fixed in f70375df85d26235a45e74559afd69be59e5ff99.

i added this to libc-test
thanks

      reply	other threads:[~2020-10-28 22:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28 20:11 Rich Felker
2020-10-28 20:18 ` Rich Felker
2020-10-28 22:01   ` Szabolcs Nagy [this message]

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