netdev - Re: [PATCH net] geneve: avoid use-after-free of skb->data

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Message-ID: <20161202183300.GA31657@tuxdriver.com>
Date:   Fri, 2 Dec 2016 13:33:01 -0500
From:   "John W. Linville" <linville@...driver.com>
To:     Sabrina Dubroca <sd@...asysnail.net>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net] geneve: avoid use-after-free of skb->data

On Fri, Dec 02, 2016 at 04:49:29PM +0100, Sabrina Dubroca wrote:
> geneve{,6}_build_skb can end up doing a pskb_expand_head(), which
> makes the ip_hdr(skb) reference we stashed earlier stale. Since it's
> only needed as an argument to ip_tunnel_ecn_encap(), move this
> directly in the function call.
> 
> Fixes: 08399efc6319 ("geneve: ensure ECN info is handled properly in all tx/rx paths")
> Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>

Reviewed-by: John W. Linville <linville@...driver.com>

-- 
John W. Linville		Someday the world will need a hero, and you
linville@...driver.com			might be all we have.  Be ready.