From owner-svn-src-stable@freebsd.org  Sat Dec 31 09:24:23 2016
Return-Path: <owner-svn-src-stable@freebsd.org>
Delivered-To: svn-src-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 21D90C988A5;
 Sat, 31 Dec 2016 09:24:23 +0000 (UTC)
 (envelope-from kostikbel@gmail.com)
Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1])
 (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 9989E1C38;
 Sat, 31 Dec 2016 09:24:22 +0000 (UTC)
 (envelope-from kostikbel@gmail.com)
Received: from tom.home (kib@localhost [127.0.0.1])
 by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id uBV9OCOh031977
 (version=TLSv1 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO);
 Sat, 31 Dec 2016 11:24:12 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua uBV9OCOh031977
Received: (from kostik@localhost)
 by tom.home (8.15.2/8.15.2/Submit) id uBV9OBCx031976;
 Sat, 31 Dec 2016 11:24:11 +0200 (EET)
 (envelope-from kostikbel@gmail.com)
X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com
 using -f
Date: Sat, 31 Dec 2016 11:24:11 +0200
From: Konstantin Belousov <kostikbel@gmail.com>
To: Luiz Otavio O Souza <loos@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject: Re: svn commit: r310883 - stable/11/sys/dev/etherswitch
Message-ID: <20161231092411.GR1923@kib.kiev.ua>
References: <201612310158.uBV1w5TD016885@repo.freebsd.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <201612310158.uBV1w5TD016885@repo.freebsd.org>
User-Agent: Mutt/1.7.2 (2016-11-26)
X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00,
 DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no
 autolearn_force=no version=3.4.1
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home
X-BeenThere: svn-src-stable@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: SVN commit messages for all the -stable branches of the src tree
 <svn-src-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-stable>, 
 <mailto:svn-src-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable/>
List-Post: <mailto:svn-src-stable@freebsd.org>
List-Help: <mailto:svn-src-stable-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-stable>,
 <mailto:svn-src-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 31 Dec 2016 09:24:23 -0000

On Sat, Dec 31, 2016 at 01:58:05AM +0000, Luiz Otavio O Souza wrote:
> -static int
>  etherswitchioctl(struct cdev *cdev, u_long cmd, caddr_t data, int flags, struct thread *td)
>  {
>  	struct etherswitch_softc *sc = cdev->si_drv1;
Since si_drv1 is dereferenced in the cdevsw methods, please consider
converting the driver to use make_dev_s(9) KPI.  This would fix a race
with a thread accessing not yet initialized si_drv1 in parallel with
the makedev thread.