kern/106783: umount of a floppy disk results in a reboot

[Doug Denault]

>Number:         106783
>Category:       kern
>Synopsis:       umount of a floppy disk results in a reboot
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 15 16:30:04 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Doug Denault
>Release:        6.1-STABLE
>Organization:
>Environment:
FreeBSD artemis.boltsys.com 6.1-STABLE FreeBSD 6.1-STABLE #7: Sun Jul  2 15:53:52 EDT 2006     doug at artemis.boltsys.com:/usr/obj/usr/src/sys/ARTEMIS  i386

>Description:
I formated a floppy with 6.1 using:
   fdformat -f 1440 /dev/fd0
   bsdlabel -B -r -w /dev/fd0 fd1440
   newfs /dev/fd0

I was using the floppy to transfer a few critical files from a crashed 4.11 system to my 6.1 desktop. I removed the floppy from the 4.11 server forgetting to umount. When I took it to the server and did the umount, I then could use the floppy. Making the same mistake on 6.1 caused a reboot. I then reformated a floppy on 6.1 using the aobve commands. Removing the floppy without a umount caused:

Dec 14 19:36:57 artemis su: doug to root on /dev/ttyp7
Dec 14 19:39:22 artemis kernel: g_vfs_done():fd0[READ(offset=102400, length=45056)]error = 5
Dec 14 19:39:27 artemis kernel: g_vfs_done():fd0[READ(offset=106496, length=40960)]error = 5
Dec 14 19:39:32 artemis kernel: g_vfs_done():fd0[READ(offset=110592, length=36864)]error = 5
Dec 14 19:39:36 artemis kernel: g_vfs_done():fd0[READ(offset=110592, length=4096)]error = 5
Dec 14 19:39:41 artemis kernel: g_vfs_done():fd0[READ(offset=114688, length=32768)]error = 5
Dec 14 19:40:11 artemis kernel: g_vfs_done():fd0[READ(offset=110592, length=4096)]error = 5
Dec 14 19:40:11 artemis kernel: vnode_pager_getpages: I/O read error
Dec 14 19:40:11 artemis kernel: vm_fault: pager read error, pid 18946 (cp)
Dec 14 19:40:40 artemis kernel: g_vfs_done():fd0[READ(offset=110592, length=36864)]error = 5
Dec 14 19:40:45 artemis kernel: g_vfs_done():fd0[READ(offset=110592, length=4096)]error = 5
Dec 14 19:40:50 artemis kernel: g_vfs_done():fd0[READ(offset=114688, length=32768)]error = 5
Dec 14 19:42:11 artemis su: doug to root on /dev/ttype
Dec 14 20:18:29 artemis syslogd: kernel boot file is /boot/kernel/kernel
Dec 14 20:18:29 artemis kernel: Copyright (c) 1992-2006 The FreeBSD Project.
Dec 14 20:18:29 artemis kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
Dec 14 20:18:29 artemis kernel: The Regents of the University of California. All rights reserved.

>How-To-Repeat:
My hardware is a Dell PE 800. Nothing special was required to repeat this. 
>Fix:
Sorry no dump was taken. This was make with the generic kernel. I can turn on debugging options and repeat if this helps. This is only a critical problem on a server,and I do not know how many have floppies these days
>Release-Note:
>Audit-Trail:
>Unformatted: