From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Segmentation fault due to double free for archetype.
Date: Mon, 17 Jan 2022 16:47:35 +0100 [thread overview]
Message-ID: <YeWPlyHklwqrYH1j@calimero.vinschen.de> (raw)
In-Reply-To: <20220117214801.1f0d9bef92224cac51b6d806@nifty.ne.jp>
On Jan 17 21:48, Takashi Yano wrote:
> On Mon, 17 Jan 2022 13:11:46 +0100
> Corinna Vinschen wrote:
> > if (!(res = (archetype && archetype->io_handle)
> > || open (flags, mode & 07777)))
> >
> > Then the archetype is one already created by a former open_with_arch
> > call and then you delete an archetype which is still in use, no?
>
> archetype->usecount is not incremented yet here.
> archetype->usecount is incremented only when this 'if' clause
> is not true. So, isn't the following code right?
>
> if (!(res = (archetype && archetype->io_handle)
> || open (flags, mode & 07777)))
> {
> if (archetype && archetype->usecount == 0)
> cygheap->fdtab.delete_archetype (archetype);
> }
Good point, yes, that sounds right to me.
Thanks,
Corinna
prev parent reply other threads:[~2022-01-17 15:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-15 10:20 Takashi Yano
2022-01-17 11:01 ` Corinna Vinschen
2022-01-17 11:41 ` Takashi Yano
2022-01-17 12:11 ` Corinna Vinschen
2022-01-17 12:48 ` Takashi Yano
2022-01-17 15:47 ` Corinna Vinschen [this message]
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