netdev - Re: [patch -next v2] 6LoWPAN: double free in lowpan_fragment

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Date:	Wed, 16 Nov 2011 11:42:07 +0300
From:	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Sergey Lapin <slapin@...fans.org>,
	"David S. Miller" <davem@...emloft.net>,
	linux-zigbee-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch -next v2] 6LoWPAN: double free in lowpan_fragment_xmit()

2011/11/16 Dan Carpenter <dan.carpenter@...cle.com>:
> dev_queue_xmit() consumes its own skb, so the call to dev_kfree_skb()
> in lowpan_fragment_xmit() is a double free.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
> v2: fixed commit message.
>
> diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
> index 602f318..e4ecc1e 100644
> --- a/net/ieee802154/6lowpan.c
> +++ b/net/ieee802154/6lowpan.c
> @@ -980,9 +980,6 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
>
>        ret = dev_queue_xmit(frag);
>
> -       if (ret < 0)
> -               dev_kfree_skb(frag);
> -
>        return ret;
>  }
>
>
>

Acked-by: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
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