kern/71391: md via NFS file + mount -t ntfs: panic: locking against myself

Martin Birgmeier martin at email.aon.at
Sun Sep 5 01:30:17 PDT 2004


>Number:         71391
>Category:       kern
>Synopsis:       md via NFS file + mount -t ntfs: panic: locking against myself
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 05 08:30:16 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Martin Birgmeier
>Release:        FreeBSD 5.2.1-RELEASE i386 (RELENG_5_2_1_RELEASE)
>Organization:
MBi at home
>Environment:
FreeBSD test.xyzzy 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Sun Apr 25 21:04:26 CEST 2004     root at test.xyzzy:/d/903s4e/OBJ/FreeBSD/RELENG_5_2_1_RELEASE/src/sys/TEST  i386


>Description:
	Scenario:
	- disk image file <image> on remote host (schg bit set)
	- "mdconfig -a -t vnode -f /.../<image>" (image via NFS)
	- mount -o ro -t ntfs /dev/md0s5 /mnt
	Errors:
	- last command results in a panic: "locking against myself"
	- (secondary) The "-o readonly" option is not understood by mdconfig,
	  although it is mentioned in the man page
	Comment:
	- Maybe due to trying to mount something which is ultimately r/o
	  using ntfs, which does not grok this?

>How-To-Repeat:
	As above.
>Fix:
	Unknown.

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


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