From owner-freebsd-security@FreeBSD.ORG Wed May 5 09:56:40 2004 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4770B16A4CE for ; Wed, 5 May 2004 09:56:40 -0700 (PDT) Received: from gw.celabo.org (gw.celabo.org [208.42.49.153]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7AB5443D73 for ; Wed, 5 May 2004 09:56:36 -0700 (PDT) (envelope-from nectar@celabo.org) Received: by gw.celabo.org (Postfix, from userid 1001) id 080515486E; Wed, 5 May 2004 11:56:36 -0500 (CDT) Date: Wed, 5 May 2004 11:56:36 -0500 From: "Jacques A. Vidrine" To: freebsd-security@FreeBSD.org, full-disclosure@lists.netsys.com, bugtraq@securityfocus.com Message-ID: <20040505165636.GB40758@hellblazer.celabo.org> Mail-Followup-To: "Jacques A. Vidrine" , freebsd-security@FreeBSD.org, full-disclosure@lists.netsys.com, bugtraq@securityfocus.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Url: http://www.celabo.org/ User-Agent: Mutt/1.5.4i Subject: Fwd: [Re: cvs commit: src/sys/vm vm_map.c] X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 May 2004 16:56:40 -0000 Hello, FYI: A FreeBSD user suggested that this issue requires a security advisory. The issue has been public for some time, but currently, FreeBSD does not issue advisories for local denial-of-service issues. It is expected that this bug will soon be fixed in FreeBSD 4.x (it is already fixed in FreeBSD 5.x, as you can see below). Cheers, -- Jacques Vidrine ----- Forwarded message from Tim Robbins ----- Date: Tue, 23 Mar 2004 21:53:10 +1100 From: Tim Robbins To: Pawel Jakub Dawidek cc: cvs-src@FreeBSD.org cc: src-committers@FreeBSD.org cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/vm vm_map.c Message-ID: <20040323105310.GA14855@cat.robbins.dropbear.id.au> On Tue, Mar 23, 2004 at 11:33:00AM +0100, Pawel Jakub Dawidek wrote: > On Tue, Mar 23, 2004 at 12:37:35AM -0800, Tim J. Robbins wrote: > +> tjr 2004/03/23 00:37:34 PST > +> > +> FreeBSD src repository > +> > +> Modified files: > +> sys/vm vm_map.c > +> Log: > +> Do not copy vm_exitingcnt to the new vmspace in vmspace_exec(). Copying > +> it led to impossibly high values in the new vmspace, causing it to never > +> drop to 0 and be freed. > > How serious it is? Do you planning to MFC it to RELENG_4 with peter@'s > patch of course? A user can cause the kernel to allocate an unbounded amount of wired memory, causing the machine to panic or stop responding. It's been observed to happen under real workloads; that is, the circumstances are not so contrived that the bug could only be caused by a malicious user. I don't have any immediate plans to MFC it (I don't have any 4.x systems right now), but peter@ or ps@ may want to after letting it settle for a while in -current. Tim ----- End forwarded message -----