mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-11-22 19:08:09 +01:00
104 lines
4.4 KiB
Text
104 lines
4.4 KiB
Text
|
From: Vasiliy Kulikov <segoon@openwall.com>
|
||
|
|
Subject: Re: [PATCH] core: dev: don't call BUG() on bad input
|
||
|
|
Date: Mon, 14 Feb 2011 15:23:13 +0300
|
||
|
|
Lines: 34
|
||
|
|
Message-ID: <20110214122313.GA10062@albatros>
|
||
|
|
References: <1297680967-11893-1-git-send-email-segoon@openwall.com>
|
||
|
|
<4D591D04.4050000@gmail.com>
|
||
|
|
Mime-Version: 1.0
|
||
|
|
Content-Type: text/plain; charset=iso-8859-1
|
||
|
|
Content-Transfer-Encoding: QUOTED-PRINTABLE
|
||
|
|
Cc: linux-kernel@vger.kernel.org,
|
||
|
|
"David S. Miller" <davem@davemloft.net>,
|
||
|
|
Eric Dumazet <eric.dumazet@gmail.com>,
|
||
|
|
Tom Herbert <therbert@google.com>,
|
||
|
|
Changli Gao <xiaosuo@gmail.com>,
|
||
|
|
Jesse Gross <jesse@nicira.com>, netdev@vger.kernel.org
|
||
|
|
To: Nicolas de =?iso-8859-1?Q?Peslo=FCan?=
|
||
|
|
<nicolas.2p.debian@gmail.com>
|
||
|
|
X-From: netdev-owner@vger.kernel.org Mon Feb 14 13:24:40 2011
|
||
|
|
Return-path: <netdev-owner@vger.kernel.org>
|
||
|
|
Envelope-to: linux-netdev-2@lo.gmane.org
|
||
|
|
Received: from vger.kernel.org ([209.132.180.67])
|
||
|
|
by lo.gmane.org with esmtp (Exim 4.69)
|
||
|
|
(envelope-from <netdev-owner@vger.kernel.org>)
|
||
|
|
id 1PoxTr-00046W-DE
|
||
|
|
for linux-netdev-2@lo.gmane.org; Mon, 14 Feb 2011 13:24:39 +0100
|
||
|
|
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
|
||
|
|
id S1754719Ab1BNMXX convert rfc822-to-quoted-printable (ORCPT
|
||
|
|
<rfc822;linux-netdev-2@m.gmane.org>); Mon, 14 Feb 2011 07:23:23 -0500
|
||
|
|
Received: from mail-bw0-f46.google.com ([209.85.214.46]:64487 "EHLO
|
||
|
|
mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
|
||
|
|
with ESMTP id S1754086Ab1BNMXU (ORCPT
|
||
|
|
<rfc822;netdev@vger.kernel.org>); Mon, 14 Feb 2011 07:23:20 -0500
|
||
|
|
Received: by bwz15 with SMTP id 15so5401470bwz.19
|
||
|
|
for <multiple recipients>; Mon, 14 Feb 2011 04:23:18 -0800 (PST)
|
||
|
|
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
||
|
|
d=gmail.com; s=gamma;
|
||
|
|
h=domainkey-signature:sender:date:from:to:cc:subject:message-id
|
||
|
|
:references:mime-version:content-type:content-disposition
|
||
|
|
:content-transfer-encoding:in-reply-to:user-agent;
|
||
|
|
bh=4cv3J11meWILtVQ6Drgqk74suEYFVRQKnvtS62ZKPMU=;
|
||
|
|
b=oson8MDOPhFFO5h9lGEmq3EcDJ7bfOy60AsJ8ka5Q45h/Fg5LvGyVGBWB48YesHBg+
|
||
|
|
51Kdb4VrtCWazj2/c1Eauv2jvrGXUjj1hZdo3Rq0jZb5eU+Nvf+7Gl8nWE1S47XmT8YW
|
||
|
|
ed9CdFnNDgvkVUw+Rg48e2nG79kDRNUGWlpKI=
|
||
|
|
DomainKey-Signature: a=rsa-sha1; c=nofws;
|
||
|
|
d=gmail.com; s=gamma;
|
||
|
|
h=sender:date:from:to:cc:subject:message-id:references:mime-version
|
||
|
|
:content-type:content-disposition:content-transfer-encoding
|
||
|
|
:in-reply-to:user-agent;
|
||
|
|
b=lEIU6CLzqKxhpDXukIqjR49CQZ370NKAkb0Aah7A1uyEdLZ9ctYpgg1oPjsQX/V9IR
|
||
|
|
TqyIP0zocVjBhUgCi32M9DPe/qjiqe+YS+EXNGLMMrF1oEUY+yFfq1jChaHkk2xuf/EM
|
||
|
|
MaGyK3svEz1q2iV1bgkTLcXCLWyK+A/M1WFlg=
|
||
|
|
Received: by 10.204.80.161 with SMTP id t33mr15020786bkk.121.1297686197182;
|
||
|
|
Mon, 14 Feb 2011 04:23:17 -0800 (PST)
|
||
|
|
Received: from localhost (ppp91-77-40-235.pppoe.mtu-net.ru [91.77.40.235])
|
||
|
|
by mx.google.com with ESMTPS id w3sm1684029bkt.5.2011.02.14.04.23.14
|
||
|
|
(version=TLSv1/SSLv3 cipher=OTHER);
|
||
|
|
Mon, 14 Feb 2011 04:23:16 -0800 (PST)
|
||
|
|
Content-Disposition: inline
|
||
|
|
In-Reply-To: <4D591D04.4050000@gmail.com>
|
||
|
|
User-Agent: Mutt/1.5.20 (2009-06-14)
|
||
|
|
Sender: netdev-owner@vger.kernel.org
|
||
|
|
Precedence: bulk
|
||
|
|
List-ID: <netdev.vger.kernel.org>
|
||
|
|
X-Mailing-List: netdev@vger.kernel.org
|
||
|
|
Archived-At: <http://permalink.gmane.org/gmane.linux.kernel/1099712>
|
||
|
|
|
||
|
|
Hi Nicolas,
|
||
|
|
|
||
|
|
On Mon, Feb 14, 2011 at 13:16 +0100, Nicolas de Peslo=FCan wrote:
|
||
|
|
> >- BUG_ON(strlen(name)>=3D sizeof(dev->name));
|
||
|
|
> >+ if (strnlen(name, sizeof(dev->name))>=3D sizeof(dev->name)) {
|
||
|
|
|
||
|
|
Ehh... Space after ")" is needed :)
|
||
|
|
|
||
|
|
> "size_t strnlen(const char *s, size_t maxlen) : The strnlen()
|
||
|
|
> function returns strlen(s), if that is less than maxlen, or maxlen
|
||
|
|
> if there is no '\0' character among the first maxlen characters
|
||
|
|
> pointed to by s."
|
||
|
|
>=20
|
||
|
|
> How can strnlen(name, sizeof(dev->name)) be greater than sizeof(dev->=
|
||
|
|
name)?
|
||
|
|
>=20
|
||
|
|
> Shouldn't it be "if (strnlen(name, sizeof(dev->name)) =3D=3D sizeof(d=
|
||
|
|
ev->name))" instead?
|
||
|
|
|
||
|
|
Not a big deal, but MO it's better to guard from everything that
|
||
|
|
is not a good input by negating the check. strnlen() < sizeof() is OK,
|
||
|
|
strnlen() >=3D sizeof() is bad. Is "=3D=3D" more preferable for net/ c=
|
||
|
|
oding style?
|
||
|
|
|
||
|
|
|
||
|
|
--=20
|
||
|
|
Vasiliy Kulikov
|
||
|
|
http://www.openwall.com - bringing security into open computing environ=
|
||
|
|
ments
|
||
|
|
--
|
||
|
|
To unsubscribe from this list: send the line "unsubscribe netdev" in
|
||
|
|
the body of a message to majordomo@vger.kernel.org
|
||
|
|
More majordomo info at http://vger.kernel.org/majordomo-info.html
|
||
|
|
|
||
|
|
|
||
|
|
|