NetBSD Problem Report #46980

From Wolfgang.Stukenbrock@nagler-company.com  Tue Sep 18 13:45:11 2012
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Date: Tue, 18 Sep 2012 15:44:59 +0200 (CEST)
From: Wolfgang.Stukenbrock@nagler-company.com
Reply-To: Wolfgang.Stukenbrock@nagler-company.com
To: gnats-bugs@gnats.NetBSD.org
Subject: genfs rename code failed to call vrele() on special error
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>Number:         46980
>Category:       kern
>Synopsis:       genfs rename code failed to call vrele() on special error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Sep 18 13:50:00 +0000 2012
>Originator:     Dr. Wolfgang Stukenbrock
>Release:        NetBSD current
>Organization:
Dr. Nagler & Company GmbH
>Environment:


System: NetBSD test-s0 4.0 NetBSD 4.0 (NSW-WS) #0: Tue Aug 17 17:28:09 CEST 2010 wgstuken@test-s0:/usr/src/sys/arch/amd64/compile/NSW-WS amd64
Architecture: x86_64
Machine: amd64
>Description:
	in genfs_rename_enter_common() if the destination is '.' the allocated
	tvp vnode is not released again.
	EISDIR is returned, but the ' goto fail2' will only release the
	previously allocated fvp vnode.
	This problem only comes up if someone is tryining to rename
	something to '...xx/.', so this is a rare case in real world ...
>How-To-Repeat:
	found by a look into the sources
>Fix:
	add another label in the chain of lables and call vrele(tvp) ...

>Unformatted:

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