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Date:      Tue, 28 Aug 2001 13:21:06 -0700 (PDT)
From:      Chris Pockele <chrisp@belgacom.net>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   misc/30168: 4-stable, crash when writing to msdos fs
Message-ID:  <200108282021.f7SKL6825055@freefall.freebsd.org>

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>Number:         30168
>Category:       misc
>Synopsis:       4-stable, crash when writing to msdos fs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 28 13:30:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Chris Pockele
>Release:        4.3-20010827-STABLE
>Organization:
none
>Environment:
FreeBSD freedaemon.home.lan 4.3-20010827-STABLE FreeBSD 4.3-20010827-STABLE #0: Tue Aug 28 00:35:45 CEST 2001     root@freedaemon.home.lan:/usr/src/sys/compile/CUSTOM  i386

>Description:
I have a FAT partition of about 4 GB on my hard disk (i think maybe
the size matters here)
It's a logical partition in a dos extended one, so it's /dev/ad0s5.

I can mount it correctly, and i can read files from it.
However, when i try to write to it, I get a Fatal trap 12
page fault while in kernel mode
all i can do is reboot :(
>How-To-Repeat:
mount the msdos partition e.g. mount -t msdos /dev/ad0s5 /mnt
(verifying that it's mounted can be done by reading - this works)

try to copy a file to it e.g. cp somefilename /mnt will trigger it
>Fix:

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

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