linux-kernel - Re: [PATCH] tools: bpf: Disable stack protector

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Message-ID: <CAOFdcFOgAH1z7EKyM=Q4EvzLuKETOWWDMwuqp36SxV-X6PGP5Q@mail.gmail.com>
Date:   Mon, 16 Jan 2023 14:49:34 -0800
From:   Peter Foley <pefoley2@...oley.com>
To:     Eduard Zingerman <eddyz87@...il.com>
Cc:     Quentin Monnet <quentin@...valent.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 <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>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] tools: bpf: Disable stack protector

On Mon, Jan 16, 2023 at 4:59 AM Eduard Zingerman <eddyz87@...il.com> wrote:
>
> A bit tangential, but since BPF LLVM backend does not support the
> stack protector (should it?) there is also an option to adjust LLVM
> to avoid this instrumentation, WDYT?
>

That would probably be worth doing, yes.
But given that won't help already released versions of clang, it
should probably happen in addition to this patch.