Re: [PATCH 17/17] arm64: allow CONFIG_CFI_CLANG to be selected

Sami Tolvanen
2021-03-16T20:47:25Z

On Thu, Mar 11, 2021 at 6:51 PM Kees Cook <keescook@chromium.org> wrote:
>
> On Thu, Mar 11, 2021 at 04:49:19PM -0800, Sami Tolvanen wrote:
> > Select ARCH_SUPPORTS_CFI_CLANG to allow CFI to be enabled.
> >
> > Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
>
> Reviewed-by: Kees Cook <keescook@chromium.org>
>
> Random thought: the vDSO doesn't need special handling because it
> doesn't make any indirect calls, yes?

That might be true, but we also filter out CC_FLAGS_LTO for the vDSO,
which disables CFI as well.

Sami