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

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Date:	Sat, 23 Mar 2013 08:09:37 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Damien Wyart <damien.wyart@...il.com>
Cc:	Tom Parkin <tparkin@...alix.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [RFC PATCH] udp: don't rereference dst_entry dev pointer on rcv

On Sat, 2013-03-23 at 11:31 +0100, Damien Wyart wrote:
> Hi Eric,
> 
> * Tom Parkin <tparkin@...alix.com> [2013-03-14 16:14]:
> > On Thu, Mar 14, 2013 at 04:29:06PM +0100, Eric Dumazet wrote:
> > > OK, I tested the following one instead, please test it so that I can send an official patch.
> 
> > > Thanks
> 
> > > diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
> > > index b6d30ac..2d23830 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_drop(skb);
> > >  	inet_frag_lru_move(&qp->q);
> > >  	return -EINPROGRESS;
> 
> > Thanks again, Eric.
> 
> > Sadly, with this patch the oops is back :-(  It falls over quite
> > quickly for me.
> 
> Just a quick check: do you plan to have another look at this in the
> coming days/weeks? You said you had a huge backlog, but in the meantime,
> you sent many patches on many topics, so just wanted to check if this
> one had not be forgotten for ever.

Hi Damien. This one is part of my backlog, I will send a patch soon.

Thanks


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