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Date:   Sat, 7 Jul 2018 15:27:51 -0700
From:   Alexei Starovoitov <>
To:     Toshiaki Makita <>
Cc:     Alexei Starovoitov <>,
        Daniel Borkmann <>,,
        John Fastabend <>
Subject: Re: [PATCH bpf] xdp: XDP_REDIRECT should check IFF_UP and MTU

On Fri, Jul 06, 2018 at 11:49:00AM +0900, Toshiaki Makita wrote:
> Otherwise we end up with attempting to send packets from down devices
> or to send oversized packets, which may cause unexpected driver/device
> behaviour. Generic XDP has already done this check, so reuse the logic
> in native XDP.
> Fixes: 814abfabef3c ("xdp: add bpf_redirect helper function")
> Signed-off-by: Toshiaki Makita <>

Applied, Thanks

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