From owner-freebsd-net@FreeBSD.ORG  Mon Jun  4 14:28:17 2012
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 1E5331065839;
	Mon,  4 Jun 2012 14:28:17 +0000 (UTC) (envelope-from misho@elwix.org)
Received: from x0r.aitnet.org (unknown [IPv6:2a00:e40:deba:1::5])
	by mx1.freebsd.org (Postfix) with ESMTP id 9A2738FC08;
	Mon,  4 Jun 2012 14:28:16 +0000 (UTC)
Received: from localhost (unknown [127.0.0.1])
	by x0r.aitnet.org (Postfix) with ESMTP id A16D63F7AD;
	Mon,  4 Jun 2012 17:28:15 +0300 (EEST)
X-Virus-Scanned: amavisd-new at aitnet.org
Received: from x0r.aitnet.org ([127.0.0.1])
	by localhost (x0r.aitnet.org [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id bXuB1fWS5Vpf; Mon,  4 Jun 2012 17:28:15 +0300 (EEST)
Received: from misho.batmbg.com (unknown [212.116.129.162])
	by x0r.aitnet.org (Postfix) with ESMTPSA id 393FC3F7AB;
	Mon,  4 Jun 2012 17:28:15 +0300 (EEST)
Date: Mon, 4 Jun 2012 17:29:28 +0300
From: Michael Pounov <misho@elwix.org>
To: freebsd-current@FreeBSD.org, freebsd-net@FreeBSD.org
Message-Id: <20120604172928.3dd24e1f.misho@elwix.org>
Organization: ELWIX
X-Mailer: Sylpheed 3.1.2 (GTK+ 2.24.6; i386-portbld-freebsd9.0)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: 
Subject: bpf kernel crash
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 04 Jun 2012 14:28:17 -0000

Kernel crash when you wish to change interface name from vlan0 to other name

It seems to be in arrival/departure events.

1) when I set up vlan0 and change name to mgmt and after that destroy mgmt.
 kernel crash in bpfdetach() at line 2495. where it tries to find interface structure.
2) when I setup vlan0, change name to mgmt and set ip address. After few seconds 
 kernel crash in vlan_transmit() at line 1029. where it tries to push mbufs to bpf interface, but it is NULL.

-- 
Michael Pounov <misho@elwix.org>