linux-kernel - Re: [PATCH v4,bpf-next] bpf: Don't redirect packets with invalid pkt

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Message-Id: <165825001414.21239.5976197980941265711.git-patchwork-notify@kernel.org>
Date:   Tue, 19 Jul 2022 17:00:14 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Zhengchao Shao <shaozhengchao@...wei.com>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, davem@...emloft.net,
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        jolsa@...nel.org, weiyongjun1@...wei.com, yuehaibing@...wei.com
Subject: Re: [PATCH v4,bpf-next] bpf: Don't redirect packets with invalid pkt_len

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Fri, 15 Jul 2022 19:55:59 +0800 you wrote:
> Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any
> skbs, that is, the flow->head is null.
> The root cause, as the [2] says, is because that bpf_prog_test_run_skb()
> run a bpf prog which redirects empty skbs.
> So we should determine whether the length of the packet modified by bpf
> prog or others like bpf_prog_test is valid before forwarding it directly.
> 
> [...]

Here is the summary with links:
  - [v4,bpf-next] bpf: Don't redirect packets with invalid pkt_len
    https://git.kernel.org/bpf/bpf-next/c/fd1894224407

You are awesome, thank you!
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