linux-kernel - Re: [PATCH v6 1/8] crypto: x86/glue_helper: Regularize function prototypes

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Message-ID: <20191122020455.GA32523@sol.localdomain>
Date:   Thu, 21 Nov 2019 18:04:55 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        João Moreira <joao.moreira@...el.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Stephan Mueller <smueller@...onox.de>, x86@...nel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v6 1/8] crypto: x86/glue_helper: Regularize function
 prototypes

On Thu, Nov 21, 2019 at 05:03:27PM -0800, Kees Cook wrote:
> The crypto glue performed function prototype casting to make indirect
> calls to assembly routines. Instead of performing casts at the call
> sites (which trips Control Flow Integrity prototype checking), switch
> each prototype to a common standard set of arguments which allows the
> incremental removal of the existing macros. In order to keep pointer
> math unchanged, internal casting between u128 pointers and u8 pointers
> is added.
> 
> Co-developed-by: João Moreira <joao.moreira@...el.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>

Co-developers need their own Signed-off-by.  checkpatch.pl warns about this.

- Eric