linux-kernel - Re: [PATCH v4 1/2] bpftool: Align output skeleton ELF code

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Message-ID: <888bde30-a61f-4b19-bb6f-0aec69f23415@isovalent.com>
Date:   Thu, 5 Oct 2023 16:51:57 +0100
From:   Quentin Monnet <quentin@...valent.com>
To:     Ian Rogers <irogers@...gle.com>,
        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 <yonghong.song@...ux.dev>,
        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@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Alan Maguire <alan.maguire@...cle.com>
Subject: Re: [PATCH v4 1/2] bpftool: Align output skeleton ELF code

On 04/10/2023 23:23, Ian Rogers wrote:
> libbpf accesses the ELF data requiring at least 8 byte alignment,
> however, the data is generated into a C string that doesn't guarantee
> alignment. Fix this by assigning to an aligned char array. Use sizeof
> on the array, less one for the \0 terminator, rather than generating a
> constant.
> 
> Fixes: a6cc6b34b93e ("bpftool: Provide a helper method for accessing skeleton's embedded ELF data")
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> Reviewed-by: Alan Maguire <alan.maguire@...cle.com>

Acked-by: Quentin Monnet <quentin@...valent.com>

Thanks