linux-kernel - Re: [PATCH v2 6/6] lkdtm: Fix CFI

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Message-ID: <202308151639.44FEBD10@keescook>
Date:   Tue, 15 Aug 2023 16:39:58 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>, Guo Ren <guoren@...nel.org>,
        Deepak Gupta <debug@...osinc.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Fangrui Song <maskray@...gle.com>,
        linux-riscv@...ts.infradead.org, llvm@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/6] lkdtm: Fix CFI_BACKWARD on RISC-V

On Tue, Aug 15, 2023 at 08:34:49PM +0000, Sami Tolvanen wrote:
> On RISC-V, the return address is before the current frame pointer,
> unlike on most other architectures. Use the correct offset on RISC-V
> to fix the CFI_BACKWARD test.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>

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

-- 
Kees Cook