From owner-freebsd-bugs@FreeBSD.ORG Fri Mar 25 13:12:20 2005 Return-Path: Delivered-To: freebsd-bugs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5FCB516A4CE; Fri, 25 Mar 2005 13:12:20 +0000 (GMT) Received: from serv1-mk3.ilse.net (serv1-mk3.ilse.net [62.69.160.41]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7581943D48; Fri, 25 Mar 2005 13:12:19 +0000 (GMT) (envelope-from marcolz@serv1-mk3.ilse.net) Received: (from marcolz@localhost) by serv1-mk3.ilse.net (8.12.11/8.12.11) id j2PDCDLO030529; Fri, 25 Mar 2005 14:12:13 +0100 (CET) (envelope-from marcolz) Date: Fri, 25 Mar 2005 14:12:13 +0100 From: Marc Olzheim To: FreeBSD-gnats-submit@FreeBSD.org, freebsd-bugs@FreeBSD.org Message-ID: <20050325131213.GB25849@ilse.net> References: <200503241716.j2OHGMrc086629@rave.ilse.net> <200503241720.j2OHK2B7024682@freefall.freebsd.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="TRYliJ5NKNqkz5bu" Content-Disposition: inline In-Reply-To: <200503241720.j2OHK2B7024682@freefall.freebsd.org> X-Operating-System: FreeBSD serv1-mk3.ilse.net 4.6-RC FreeBSD 4.6-RC X-URL: http://ilse.nl/ User-Agent: Mutt/1.5.9i cc: sven@berkvens.net cc: Marc Olzheim Subject: Re: kern/79208: Deadlock or starvation doing heavy NFS writes with writev X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Mar 2005 13:12:20 -0000 --TRYliJ5NKNqkz5bu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On a FreeBSD 6.0-CURRENT (Fri Mar 25 11:09:51 CET 2005) machine, the same happens. This machine has less memory 512 MB instead of 4GB, so the limit is lower than 60 MB: 31 MB is enough. It produces a file of 31506432 bytes on the NFS server, during which the machine becomes unresponsive and then never recovers. ping/ping6 still works, but that's all. Power cycling the machine is all that's left... Oh yeah, forgot to mention: this is as mortal user, not as root, so it's a simple local Denial of Service attack. :-( On FreeBSD-4.11 it works as expected, no hangs. Marc --TRYliJ5NKNqkz5bu Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFCRA4tezjnobFOgrERAqnUAJ96HLgAJVDPpcks01JbodFIlk/UGACgqCcI RTdiBc/Q1zXrriwideSu2Oc= =jF8g -----END PGP SIGNATURE----- --TRYliJ5NKNqkz5bu--