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Date: Mon,  5 Apr 1999 02:41:03 -0700 (PDT)
From: ulianov@ns.csm.ro
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Subject: kern/10959: 3.1-STABLE crashes due to a floppy mount problem
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>Number:         10959
>Category:       kern
>Synopsis:       3.1-STABLE crashes due to a floppy mount problem
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr  5 02:40:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Vladimir COTFAS
>Release:        3.1-STABLE
>Organization:
NetAppi
>Environment:
FreeBSD cmell 3.1-RELEASE FreeBSD 3.1-RELEASE #0: Sun Apr  2 20:35:45 EEST 2000     root@cmell:/usr/src/sys/compile/SOUL  i386
>Description:
While trying to (incorrectly) mount a read-only DOS formatted diskette
as a read-write medium encountered NO error (BTW Linux complains and 
mounts it read-only). "Wrote" a file to this filesystem and then dismounted
it. The result was a nice crash.
This strange behaviour is present even in the GENERIC kernel shipped with
the 3.1-STABLE distribution.
>How-To-Repeat:
1. pick a read-only DOS-formated diskette and insert it into the drive
2. mount -t msdos /dev/fd0 /floppy
3. cd /floppy; cp /etc/profile .
# get an error and 2 kernel messages
4. cd /; umount /floppy
# at this stage the machine panic()'s 

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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