kern/43745: fhopen of an unlinked file causes problems on multiple file systems

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>Number:         43745
>Category:       kern
>Synopsis:       fhopen of an unlinked file causes problems on multiple file 
>systems
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 12 09:40:00 +0000 2010
>Originator:     Antti Kantee
>Release:        
>Organization:
>Environment:
>Description:
getfh() + unlink() + fhopen() succeeds on msdosfs and lfs.
It panics the kernel on with nfs.
>How-To-Repeat:
run tests/fs/vfs/t_vfsops
>Fix: