>Submitter-Id:	net
>Originator:	Bob Kemp
>Organization:
	ECS Dept, Southampton University, UK.
>Confidential:	no
>Synopsis:	msdosfs
>Severity:	serious
>Priority:	medium
>Category:	kern
>Class:		sw-bug
>Release:	-current 05Mar94
>Environment:
System: NetBSD allegory 0.9a ALLEGORY#0 i386


>Description:

	Creating lots of directories in a DOS filesystem can produce
	an incorrect filesystem or panic the kernel.

>How-To-Repeat:

	mount a DOS filesystem on (say) /mnt
	mkdir /mnt/zxc
	cd /mnt/zxc
	mkdir {q,w,e,r,t,y,u}{q,w,e,r,t,y,u}
	mkdir {q,w,e,r,t,y,u}{q,w,e,r,t,y,u}/{q,w,e,r,t,y,u}{q,w,e,r,t,y,u}

	# At this point, produces an error message about freeing a free block
	#	with a real (ie hard disc) filesystem it panics
	#	with a vnode filesystem it only gives an error message

	NB: the filesystem was clean according to the DOS chkdsk command
	    _before_ I tried this.

>Fix:
	Use mtools :-)



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