netdev - Re: [PATCH] batman-adv: Fix mem leak in the batadv_tt_local

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Message-ID: <alpine.LNX.2.00.1208072037380.3227@swampdragon.chaosbits.net>
Date:	Tue, 7 Aug 2012 20:38:49 +0200 (CEST)
From:	Jesper Juhl <jj@...osbits.net>
To:	linux-kernel@...r.kernel.org
cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	"David S. Miller" <davem@...emloft.net>,
	Antonio Quartulli <ordex@...istici.org>,
	Simon Wunderlich <siwu@....tu-chemnitz.de>,
	Marek Lindner <lindner_marek@...oo.de>
Subject: Re: [PATCH] batman-adv: Fix mem leak in the batadv_tt_local_event()
 function

On Tue, 7 Aug 2012, Jesper Juhl wrote:

> Memory is allocated for 'tt_change_node' with kmalloc().
> 'tt_change_node' may go out of scope really being used for anything

This should of course read "... go out of scope without really being used ..." .

> (except have a few members initialized) if we hit the 'del:' label.
> This patch makes sure we free the memory in that case.
> 
> Signed-off-by: Jesper Juhl <jj@...osbits.net>
> ---
>  net/batman-adv/translation-table.c | 1 +
>  1 file changed, 1 insertion(+)
> 
>  Compile tested only.
> 
> diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
> index a438f4b..99dd8f7 100644
> --- a/net/batman-adv/translation-table.c
> +++ b/net/batman-adv/translation-table.c
> @@ -197,6 +197,7 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv,
>  del:
>  		list_del(&entry->list);
>  		kfree(entry);
> +		kfree(tt_change_node);
>  		event_removed = true;
>  		goto unlock;
>  	}
> 

-- 
Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
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