netdev - Re: [PATCH bpf] bpf: fix for BUG: kernel NULL pointer dereference, address: 0000000000000000

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Message-ID: <ca12f265-1223-de25-a23b-a3d53dceb4d5@iogearbox.net>
Date:   Mon, 12 Jul 2021 17:16:47 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, bpf@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        netdev@...r.kernel.org, Abaci <abaci@...ux.alibaba.com>,
        Dust Li <dust.li@...ux.alibaba.com>
Subject: Re: [PATCH bpf] bpf: fix for BUG: kernel NULL pointer dereference,
 address: 0000000000000000

On 7/8/21 10:04 AM, Xuan Zhuo wrote:
> These two types of xdp prog(BPF_XDP_DEVMAP, BPF_XDP_CPUMAP) will not be
> executed directly in the driver, we should not directly run these two
> XDP progs here. To run these two situations, there must be some special
> preparations, otherwise it may cause kernel exceptions.

Applied, thanks!