linux-hardening - Re: [RFC PATCH v2 14/21] treewide: Drop _

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Date:   Mon, 16 May 2022 09:32:27 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Joao Moreira <joao@...rdrivepizza.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-hardening@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, llvm@...ts.linux.dev
Subject: Re: [RFC PATCH v2 14/21] treewide: Drop __cficanonical

On Sat, May 14, 2022 at 2:56 PM Kees Cook <keescook@...omium.org> wrote:
>
> On Fri, May 13, 2022 at 01:21:52PM -0700, Sami Tolvanen wrote:
> > CONFIG_CFI_CLANG doesn't use a jump table anymore and therefore,
> > won't change function references to point elsewhere. Remove the
> > __cficanonical attribute and all uses of it.
> >
> > Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
> > ---
> >  include/linux/compiler_types.h | 4 ----
> >  include/linux/init.h           | 4 ++--
> >  include/linux/pci.h            | 4 ++--
> >  3 files changed, 4 insertions(+), 8 deletions(-)
>
> I think this is missing removing it from include/linux/compiler-clang.h ?

That was removed in the earlier patch that switched the CFI implementation.

> With that done (or explained why not):

I'll add a note about it to the commit message.

Sami