linux-kernel - Re: [PATCH v2] lib/string.c: implement stpcpy

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Message-ID: <202008171216.945D6D7D11@keescook>
Date:   Mon, 17 Aug 2020 12:16:37 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Arvind Sankar <nivedita@...m.mit.edu>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Fangrui Song <maskray@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Joe Perches <joe@...ches.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dávid Bolvanský <david.bolvansky@...il.com>,
        Eli Friedman <efriedma@...cinc.com>,
        "# 3.4.x" <stable@...r.kernel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Daniel Axtens <dja@...ens.net>, Ingo Molnar <mingo@...nel.org>,
        Yury Norov <yury.norov@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: [PATCH v2] lib/string.c: implement stpcpy

On Mon, Aug 17, 2020 at 10:14:43AM -0700, Sami Tolvanen wrote:
> I just confirmed that adding -fno-builtin-stpcpy to KBUILD_CFLAGS does
> work with LTO as well.

Oh, I read this out of order; sorry! Yes, if -fno-builtin-stpcpy works,
let's use that instead. Doesn't that solve it too?

-- 
Kees Cook