Re: [PATCH 2/2] bpf: cgroup: Fix problematic bounds check

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Subject: Re: [PATCH 2/2] bpf: cgroup: Fix problematic bounds check
From: Loris Reiff <loris.reiff@xxxxxxxxx>
Date: Fri, 22 Jan 2021 18:10:36 +0100
Cc: bpf <bpf@xxxxxxxxxxxxxxx>, Netdev <netdev@xxxxxxxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Andrii Nakryiko <andrii@xxxxxxxxxx>, Martin Lau <kafai@xxxxxx>, Song Liu <songliubraving@xxxxxx>, Yonghong Song <yhs@xxxxxx>, John Fastabend <john.fastabend@xxxxxxxxx>, "kpsingh@xxxxxxxxxx" <kpsingh@xxxxxxxxxx>
In-reply-to: <CAKH8qBtOVr_y2r2dSC+p7E1jfehXsh-RUdNLeo3n7zquMzogBw@mail.gmail.com>

Excerpts from Stanislav Fomichev's message of January 22, 2021 18:04:
> Thanks! I assume this is only an issue if the BPF program is written
> incorrectly.

Yes exactly.

References:
- [PATCH 1/2] bpf: cgroup: Fix optlen WARN_ON_ONCE toctou
  - From: Loris Reiff
- [PATCH 2/2] bpf: cgroup: Fix problematic bounds check
  - From: Loris Reiff
- Re: [PATCH 2/2] bpf: cgroup: Fix problematic bounds check
  - From: Stanislav Fomichev

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