netdev - Re: [PATCH bpf-next 1/4] libbpf: fix detection of BPF helper call instruction

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Message-ID: <0c06b319-bbdb-a692-e659-f5bc873be43c@iogearbox.net>
Date:   Thu, 20 Aug 2020 17:16:38 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Andrii Nakryiko <andriin@...com>, bpf@...r.kernel.org,
        netdev@...r.kernel.org, ast@...com
Cc:     andrii.nakryiko@...il.com, kernel-team@...com,
        Yonghong Song <yhs@...com>
Subject: Re: [PATCH bpf-next 1/4] libbpf: fix detection of BPF helper call
 instruction

On 8/20/20 8:14 AM, Andrii Nakryiko wrote:
> BPF_CALL | BPF_JMP32 is explicitly not allowed by verifier for BPF helper
> calls, so don't detect it as a valid call. Also drop the check on func_id
> pointer, as it's currently always non-null.
> 
> Reported-by: Yonghong Song <yhs@...com>
> Fixes: 109cea5a594f ("libbpf: Sanitize BPF program code for bpf_probe_read_{kernel, user}[_str]")
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Series applied, thanks!