netdev - Re: [PATCH net-next] tun: relax check on eth_get

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Message-Id: <20171019.131848.1359990254656797334.davem@davemloft.net>
Date:   Thu, 19 Oct 2017 13:18:48 +0100 (WEST)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     netdev@...r.kernel.org, peterpenkov96@...il.com
Subject: Re: [PATCH net-next] tun: relax check on eth_get_headlen() return
 value

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 17 Oct 2017 10:07:44 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> syzkaller hit the WARN() in tun_get_user(), providing skb
> with payload in fragments only, and nothing in skb->head
> 
> GRO layer is fine with this, so relax the check.
> 
> Fixes: 90e33d459407 ("tun: enable napi_gro_frags() for TUN/TAP driver")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.