linux-kernel - Re: [PATCH v3 08/16] lkdtm: Use an opaque type for lkdtm_rodata_do

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Message-ID: <202109141231.CD2DE05@keescook>
Date:   Tue, 14 Sep 2021 12:32:01 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     x86@...nel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH v3 08/16] lkdtm: Use an opaque type for
 lkdtm_rodata_do_nothing

On Tue, Sep 14, 2021 at 12:10:37PM -0700, Sami Tolvanen wrote:
> Use an opaque type for lkdtm_rodata_do_nothing to stop the compiler
> from generating a CFI jump table entry that jumps to .rodata.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>

Acked-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook