From owner-freebsd-bugs  Tue Apr  7 05:50:03 1998
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Date: Tue, 7 Apr 1998 08:45:01 -0400 (EDT)
From: green@feldman.dyn.ml.org
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Subject: kern/6237: mount_union causes locking problems, system panics
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>Number:         6237
>Category:       kern
>Synopsis:       panic rm'ing a union mounted file
>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 Apr  7 05:50:01 PDT 1998
>Last-Modified:
>Originator:     Brian Feldman
>Organization:
>Release:        FreeBSD 2.2.6-STABLE i386
>Environment:

	Standard system up and running, had mount_union /tmp /usr/tmp done.
>Description:

IdlePTD 23c000
current pcb at 20c93c
panic: ufs_lock: recursive lock not expected, pid: %d

#0  0xf0112723 in boot ()
(kgdb) 

Is that a nice description?

>How-To-Repeat:

mount_union /tmp /usr/tmp
rm /usr/tmp/*
panic()
(I think that the file may have been previously locked already, unsure)
>Fix:
	
	Well, I guess I should stop messing around with all the filesystems I don't really need.

>Audit-Trail:
>Unformatted:

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