From owner-freebsd-bugs@FreeBSD.ORG  Thu Sep 22 12:40:07 2005
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
X-Original-To: freebsd-bugs@hub.freebsd.org
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B5C0816A42B
	for <freebsd-bugs@hub.freebsd.org>;
	Thu, 22 Sep 2005 12:40:07 +0000 (GMT)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21])
	by mx1.FreeBSD.org (Postfix) with ESMTP id A68EE43D4C
	for <freebsd-bugs@hub.freebsd.org>;
	Thu, 22 Sep 2005 12:40:06 +0000 (GMT)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.13.3/8.13.3) with ESMTP id j8MCe6xl095160
	for <freebsd-bugs@freefall.freebsd.org>; Thu, 22 Sep 2005 12:40:06 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.13.3/8.13.1/Submit) id j8MCe67D095159;
	Thu, 22 Sep 2005 12:40:06 GMT (envelope-from gnats)
Resent-Date: Thu, 22 Sep 2005 12:40:06 GMT
Resent-Message-Id: <200509221240.j8MCe67D095159@freefall.freebsd.org>
Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer)
Resent-To: freebsd-bugs@FreeBSD.org
Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Kwint <kwint@vianet.lt>
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 8001616A41F
	for <freebsd-gnats-submit@FreeBSD.org>;
	Thu, 22 Sep 2005 12:30:40 +0000 (GMT)
	(envelope-from nobody@FreeBSD.org)
Received: from www.freebsd.org (www.freebsd.org [216.136.204.117])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 39C5143D48
	for <freebsd-gnats-submit@FreeBSD.org>;
	Thu, 22 Sep 2005 12:30:40 +0000 (GMT)
	(envelope-from nobody@FreeBSD.org)
Received: from www.freebsd.org (localhost [127.0.0.1])
	by www.freebsd.org (8.13.1/8.13.1) with ESMTP id j8MCUdWL083018
	for <freebsd-gnats-submit@FreeBSD.org>; Thu, 22 Sep 2005 12:30:39 GMT
	(envelope-from nobody@www.freebsd.org)
Received: (from nobody@localhost)
	by www.freebsd.org (8.13.1/8.13.1/Submit) id j8MCUdrX083017;
	Thu, 22 Sep 2005 12:30:39 GMT (envelope-from nobody)
Message-Id: <200509221230.j8MCUdrX083017@www.freebsd.org>
Date: Thu, 22 Sep 2005 12:30:39 GMT
From: Kwint <kwint@vianet.lt>
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-2.3
Cc: 
Subject: misc/86456: arp program hangs
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Sep 2005 12:40:07 -0000


>Number:         86456
>Category:       misc
>Synopsis:       arp program hangs
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Sep 22 12:40:06 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Kwint
>Release:        FreeBSD 4.9-RELEASE
>Organization:
VIANET
>Environment:
FreeBSD gw.vianet.lt 4.9-RELEASE FreeBSD 4.9-RELEASE #7: Mon Aug 16 16:20:58 EEST 2004     kwint@gw.vianet:/usr/src/sys/compile/GATEWAY  i386
>Description:
arp -da hangs unpredictably.
I mean some two or three times it deletes arp entries, but then doing again arp -da it hangs in the middle of deleting arp enries. I found that it just loops in rtmsg(int cmd, struct sockaddr_inarp *dst, struct sockaddr_dl *sdl) function in this loop:

do {
                l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
it gets rtm->rtm_seq=0 and rtm->rtm_pid=0 every time.
>How-To-Repeat:
do continuos arp -da, I did it in shell script
or, change /usr/sbin/arp source code to continuosly do arp -da
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: