linux-kernel - Re: [PATCH 5/6] ocfs2: Fix memory leak on mlog_sys

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Date:	Fri, 23 Jul 2010 20:01:33 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Patrick Pannuto <ppannuto@...eaurora.org>
CC:	linux-kernel@...r.kernel.org, Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <joel.becker@...cle.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	David Teigland <teigland@...hat.com>,
	ocfs2-devel@....oracle.com
Subject: Re: [PATCH 5/6] ocfs2: Fix memory leak on mlog_sys_init error path

Patrick Pannuto wrote:
> This leak is the same as the bus path; mlog_kset.kobj.name is
> set, but kset_register fails, thus nothing will ever call
> kset_unregister and name will be leaked
> 
> Signed-off-by: Patrick Pannuto <ppannuto@...eaurora.org>
> ---
>  fs/ocfs2/cluster/masklog.c |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
> index c7fba39..de715d4 100644
> --- a/fs/ocfs2/cluster/masklog.c
> +++ b/fs/ocfs2/cluster/masklog.c
> @@ -154,6 +154,7 @@ static struct kset mlog_kset = {
>  int mlog_sys_init(struct kset *o2cb_kset)
>  {
>  	int i = 0;
> +	int ret;
>  
>  	while (mlog_attrs[i].attr.mode) {
>  		mlog_attr_ptrs[i] = &mlog_attrs[i].attr;
> @@ -163,7 +164,11 @@ int mlog_sys_init(struct kset *o2cb_kset)
>  
>  	kobject_set_name(&mlog_kset.kobj, "logmask");
>  	mlog_kset.kobj.kset = o2cb_kset;
> -	return kset_register(&mlog_kset);
> +
> +	ret = kset_register(&mlog_kset);
> +	if (ret)
> +		kfree(mlog_kset.kobj.name);

Aren't we supposed to use kobject_cleanup() here?

> +	return ret;
>  }
>  
>  void mlog_sys_shutdown(void)

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