netdev - Re: [PATCH net-next] net: ipv4: fix drop handling in ip_list_rcv() and ip_list_rcv

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Message-Id: <20180705.112605.1670394902995823182.davem@davemloft.net>
Date:   Thu, 05 Jul 2018 11:26:05 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     ecree@...arflare.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: ipv4: fix drop handling in ip_list_rcv()
 and ip_list_rcv_finish()

From: Edward Cree <ecree@...arflare.com>
Date: Wed, 4 Jul 2018 19:23:50 +0100

> Since callees (ip_rcv_core() and ip_rcv_finish_core()) might free or steal
>  the skb, we can't use the list_cut_before() method; we can't even do a
>  list_del(&skb->list) in the drop case, because skb might have already been
>  freed and reused.
> So instead, take each skb off the source list before processing, and add it
>  to the sublist afterwards if it wasn't freed or stolen.
> 
> Fixes: 5fa12739a53d net: ipv4: listify ip_rcv_finish
> Fixes: 17266ee93984 net: ipv4: listified version of ip_rcv
> Signed-off-by: Edward Cree <ecree@...arflare.com>

Applied, thanks Edward.