Re: [PATCH v1 07/10] lkdtm: Force do_nothing() out of line
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- To: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
- Subject: Re: [PATCH v1 07/10] lkdtm: Force do_nothing() out of line
- From: Kees Cook <keescook@xxxxxxxxxxxx>
- Date: Wed, 13 Oct 2021 00:02:41 -0700
- Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
- In-reply-to: <b353a85e50ac336c385b46459a5fc43f4a6171ac.1633964380.git.christophe.leroy@csgroup.eu>
- References: <cover.1633964380.git.christophe.leroy@csgroup.eu> <b353a85e50ac336c385b46459a5fc43f4a6171ac.1633964380.git.christophe.leroy@csgroup.eu>
On Mon, Oct 11, 2021 at 05:25:34PM +0200, Christophe Leroy wrote:
> LKDTM tests display that the run do_nothing() at a given
> address, but in reality do_nothing() is inlined into the
> caller.
>
> Force it out of line so that it really runs text at the
> displayed address.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
--
Kees Cook
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