netdev - Re: [PATCH net 1/2] ip_tunnel: Fix a memory corruption in ip_tunnel

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Message-ID: <20130925121337.GZ7660@secunet.com>
Date:	Wed, 25 Sep 2013 14:13:37 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net 1/2] ip_tunnel: Fix a memory corruption in
 ip_tunnel_xmit

On Wed, Sep 25, 2013 at 04:56:03AM -0700, Eric Dumazet wrote:
> On Wed, 2013-09-25 at 07:54 +0200, Steffen Klassert wrote:
> > We might extend the used aera of a skb beyond the total
> > headroom when we install the ipip header. Fix this by
> > calling skb_cow_head() unconditionally.
> > 
> > Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
> > ---
> >  net/ipv4/ip_tunnel.c |   12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> Do you know or can we find when was the bug introduced ?

It was commit c544193214 (GRE: Refactor GRE tunneling code.)
when net/ipv4/ip_tunnel.c was created.

> 
> (commit id and title in your changelog would be really nice)
> 

I can send a v2 with these informations included if you want
that.
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