Date: Wed, 3 Jan 1996 09:55:08 -0800 (PST) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: gpalmer@westhill.cdrom.com Cc: freebsd-stable@freebsd.org Subject: Re: Another 2.1 panic :-( Message-ID: <199601031755.JAA28812@GndRsh.aac.dev.com> In-Reply-To: <8926.820660026@westhill.cdrom.com> from "gpalmer@westhill.cdrom.com" at Jan 3, 96 01:07:06 am
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> > > Hi guys. > > Same machine, different panic: > > IdlePTD 1f3000 > current pcb at 1ca3e0 > panic: ufs_unlock NOT LOCKED > #0 boot (howto=260) at ../../i386/i386/machdep.c:892 ... > > This is on a CDROM that was just mounted, and the command that seemed > to do it was a `ls' of the directory the CDROM was mounted on. I just > noticed that the twit which did this did: > > cd /cdrom > ls > mount /cdrom > ls > <panic> > > Still, it should not have happened... > > Again, core file available. It didn't panic my system but I saw a very similiar thing the other night, let me see if I can reproduce it: SkyRsh# umount /mnt SkyRsh# cd /mnt SkyRsh# ls SkyRsh# mount /dev/sd1a /mnt SkyRsh# ls disks tfs tmp SkyRsh# ls disks ls: disks: No such file or directory SkyRsh# cd disks disks: No such file or directory. SkyRsh# ls disks tfs tmp SkyRsh# ls -lag total 5 drwxr-xr-x 5 root wheel 512 Jan 1 17:23 . drwxr-xr-x 20 root wheel 512 Dec 23 16:50 .. drwxr-xr-x 13 root wheel 512 Dec 2 12:44 disks drwxr-xr-x 2 rgrimes rgrimes 512 Jul 27 12:12 tfs drwxrwxrwt 3 root wheel 512 Jan 1 17:23 tmp SkyRsh# cd /mnt SkyRsh# ls archie.jpeg disks tfs tmp SkyRsh# ls disks #9 brother kouwell novell adaptec di microsoft osf1 asus ecs miro SkyRsh# Seems that the mount code is allowing you to mount over a ``busy'' directory :-(. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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