From owner-freebsd-hackers Sun Dec 1 18:07:27 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id SAA12845 for hackers-outgoing; Sun, 1 Dec 1996 18:07:27 -0800 (PST) Received: from ican.net (ican.net [198.133.36.9]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id SAA12840 for ; Sun, 1 Dec 1996 18:07:25 -0800 (PST) Received: from gate.ican.net(really [198.133.36.2]) by ican.net via sendmail with esmtp id for ; Sun, 1 Dec 1996 21:07:24 -0500 (EST) (Smail-3.2 1996-Jul-4 #1 built 1996-Jul-10) Received: (from smap@localhost) by gate.ican.net (8.7.5/8.7.3) id VAA19789; Sun, 1 Dec 1996 21:04:51 -0500 (EST) Received: from nap.io.org(10.1.1.3) by gate.ican.net via smap (V1.3) id sma019779; Sun Dec 1 21:04:25 1996 Received: from localhost (taob@localhost) by nap.io.org (8.7.5/8.7.3) with SMTP id VAA04280; Sun, 1 Dec 1996 21:02:04 -0500 (EST) X-Authentication-Warning: nap.io.org: taob owned process doing -bs Date: Sun, 1 Dec 1996 21:02:04 -0500 (EST) From: Brian Tao To: Robert Nordier cc: "Jordan K. Hubbard" , hackers@FreeBSD.org Subject: Re: A simple way to crash your system. In-Reply-To: <199611261049.MAA02308@eac.iafrica.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk On Tue, 26 Nov 1996, Robert Nordier wrote: > > *All* problems occurred with the DOS FS on a 64/63 IDE drive. FIPS > was not necessarily used. In one case, the corrupted UFS fs was > actually on another drive. Twice I've had ufs corruption with 2.2-ALPHA: Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/sd0a 98479 15436 75165 17% / /dev/sd0s2e 73855 56996 10951 84% /usr /dev/sd0s2f 19487 5549 12380 31% /var /dev/sd0s2g 297423 226040 47590 83% /usr/local /dev/sd0s2h 285087 67507 194774 26% /usr/X11R6 /dev/sd0s1 102166 17800 84366 17% /c: /dev/sd1s1 1052064 604832 447232 57% /d: Both times I was copying files to /d:, which you will note is a DOS filesystem over 1G, on a separate drive. I think that's about the only piece of hard evidence we have in common. My /usr filesystem (and probably others) was hosed. I've had problems before (prior to 2.2-ALPHA) writing to smaller DOS filesystems on the same drive as UFS filesystems, but I can't remember the details of those incidents. On another occasion, ld.so complained it couldn't find needed libraries, and an 'ls -l' in /usr/lib showed corrupted directory entries (strange filenames, huge file sizes, etc.) I immediately rebooted and after the fsck, nothing appeared to be lost. -- Brian Tao (BT300, taob@io.org, taob@ican.net) Senior Systems and Network Administrator, Internet Canada Corp. "Though this be madness, yet there is method in't"