From owner-freebsd-current Wed May 27 09:30:51 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id JAA03755 for freebsd-current-outgoing; Wed, 27 May 1998 09:30:51 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from sumatra.americantv.com (sumatra.americantv.com [207.170.17.37]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id JAA03749 for ; Wed, 27 May 1998 09:30:49 -0700 (PDT) (envelope-from jlemon@americantv.com) Received: from right.PCS (right.PCS [148.105.10.31]) by sumatra.americantv.com (8.8.5/8.8.5) with ESMTP id LAA26315; Wed, 27 May 1998 11:30:45 -0500 (CDT) Received: (from jlemon@localhost) by right.PCS (8.6.13/8.6.4) id LAA26883; Wed, 27 May 1998 11:30:14 -0500 Message-ID: <19980527113013.57367@right.PCS> Date: Wed, 27 May 1998 11:30:13 -0500 From: Jonathan Lemon To: Brian Feldman Cc: freebsd-current@FreeBSD.ORG Subject: Re: current instabilities References: <19980527032329.16263.qmail@m2.findmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.61.1 In-Reply-To: <19980527032329.16263.qmail@m2.findmail.com>; from Brian Feldman on May 05, 1998 at 03:23:29AM -0000 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On May 05, 1998 at 03:23:29AM -0000, Brian Feldman wrote: > 2) "options VM86" - EVIL EVIL EVIL! This really allows way too much > access to the memory by a mortal, and it's an effective DoS attack if a > user runs doscmd, say, and a certain executable (this time, I happened > to try ZSnes). Think there may be a way to make this safer? (I locked > myself up, and it didn't panic so I don't know what exact function > caused it). Also, could USER_LDT possibly be used as a DoS attack, like > it seems to me it could? Uh. I've tried really hard to make sure that VM86 won't lock the system up. Are you sure that it is VM86, and not USER_LDT? If there is something in doscmd that can freeze the system, I'd like to know about it so I can get it fixed. :-) -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message