linux-kernel - Re: [PATCH 3/4] tty: Abstract and encapsulate tty->closing behavior

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <56408A72.4050301@hurleysoftware.com>
Date:	Mon, 9 Nov 2015 06:58:42 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Johannes Stezenbach <js@...21.net>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, netdev@...r.kernel.org,
	Karsten Keil <isdn@...ux-pingi.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	Mikael Starvik <starvik@...s.com>,
	Jiri Kosina <jikos@...nel.org>,
	David Sterba <dsterba@...e.com>,
	Mark Hounschell <markh@...pro.net>
Subject: Re: [PATCH 3/4] tty: Abstract and encapsulate tty->closing behavior

On 11/09/2015 04:12 AM, Johannes Stezenbach wrote:
> On Sun, Nov 08, 2015 at 05:02:52PM -0500, Peter Hurley wrote:
>> +void tty_ldisc_closing(struct tty_struct *tty)
>> +{
>> +	struct tty_ldisc *ld = tty_ldisc_ref(tty);
>> +
>> +	if (ld->ops->closing)
>> +		ld->ops->closing(tty);
>> +	if (ld)
>> +		tty_ldisc_deref(ld);
>> +}
> 
> That looks strange.  Do you need to check ld _before_ dereferencing?

Yes. Thanks for noticing.

Regards,
Peter Hurley
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/