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Date:   Wed, 12 Aug 2020 11:24:46 +0200
From:   Toke Høiland-Jørgensen <>
To:     Andrii Nakryiko <>,,,,
        Andrii Nakryiko <>,
        Stanislav Fomichev <>
Subject: Re: [PATCH bpf] bpf: fix XDP FD-based attach/detach logic around XDP_FLAGS_UPDATE_IF_NOEXIST

Andrii Nakryiko <> writes:

> Enforce XDP_FLAGS_UPDATE_IF_NOEXIST only if new BPF program to be attached is
> non-NULL (i.e., we are not detaching a BPF program).
> Reported-by: Stanislav Fomichev <>
> Fixes: d4baa9368a5e ("bpf, xdp: Extract common XDP program attachment logic")
> Signed-off-by: Andrii Nakryiko <>

Acked-by: Toke Høiland-Jørgensen <>

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