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Date:   Tue, 14 Sep 2021 12:30:26 -0700
From:   Kees Cook <>
To:     Sami Tolvanen <>
Cc:, Josh Poimboeuf <>,
        Peter Zijlstra <>,
        Nathan Chancellor <>,
        Nick Desaulniers <>,
        Sedat Dilek <>,,,
Subject: Re: [PATCH v3 07/16] lkdtm: Disable UNSET_SMEP with CFI

On Tue, Sep 14, 2021 at 12:10:36PM -0700, Sami Tolvanen wrote:
> Disable the UNSET_SMEP test when CONFIG_CFI_CLANG is enabled as
> jumping to a call gadget would always trip CFI instead.
> Signed-off-by: Sami Tolvanen <>

Yeah, (thankfully) this test can't work sanely under CFI.

Acked-by: Kees Cook <>

Kees Cook

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