netdev - Re: [RFC PATCH] udp: don't rereference dst

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Message-ID: <20130314144550.GB2512@raven>
Date:	Thu, 14 Mar 2013 14:45:51 +0000
From:	Tom Parkin <tparkin@...alix.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] udp: don't rereference dst_entry dev pointer on rcv

On Thu, Mar 14, 2013 at 02:18:04AM +0100, Eric Dumazet wrote:
> Ah thanks for this, as this definitely makes more sense ;)
> 
> Could you try the following fix ?
> 
> diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
> index b6d30ac..87f4ecb 100644
> --- a/net/ipv4/ip_fragment.c
> +++ b/net/ipv4/ip_fragment.c
> @@ -529,6 +529,7 @@ found:
>  	    qp->q.meat == qp->q.len)
>  		return ip_frag_reasm(qp, prev, dev);
>  
> +	skb_dst_force(skb);
>  	inet_frag_lru_move(&qp->q);
>  	return -EINPROGRESS;
>

Thanks Eric, with this patch I can no longer reproduce the oops :-)
-- 
Tom Parkin
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development

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