linux-kernel - Re: bpf: ensure all memory is initialized in bpf_get_current

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Message-ID: <CAADnVQJ7tG-b_+F7HnrhJ0e-p=PkvymHfQPWybVO2icSiV84aw@mail.gmail.com>
Date:   Thu, 6 Apr 2023 16:00:29 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Barret Rhoden <brho@...gle.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        bpf <bpf@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: bpf: ensure all memory is initialized in bpf_get_current_comm

On Wed, Apr 5, 2023 at 3:53 PM Barret Rhoden <brho@...gle.com> wrote:
>
> BPF helpers that take an ARG_PTR_TO_UNINIT_MEM must ensure that all of
> the memory is set, including beyond the end of the string.
>
> Signed-off-by: Barret Rhoden <brho@...gle.com>

The patch looks fine, but please rebase to bpf-next and resubmit
with [PATCH bpf-next] subj, so it goes through BPF CI.

See Documentation/bpf/bpf_devel_QA.rst