linux-kernel - Re: [PATCH v4] crypto: arm64/sha: fix function types

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Message-ID: <20191128002508.GB303989@sol.localdomain>
Date:   Wed, 27 Nov 2019 16:25:08 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Kees Cook <keescook@...omium.org>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>
Subject: Re: [PATCH v4] crypto: arm64/sha: fix function types

On Wed, Nov 27, 2019 at 03:55:03PM -0800, Sami Tolvanen wrote:
> Instead of casting pointers to callback functions, add C wrappers
> to avoid type mismatch failures with Control-Flow Integrity (CFI)
> checking.
> 
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
> Reviewed-by: Ard Biesheuvel <ardb@...nel.org>
> ---
> Changes in v4:
>   - Removed unnecessary returns.
> 
> Changes in v3:
>   - Removed unnecessary inline attributes.
> 
> Changes in v2:
>   - Added wrapper functions instead of changing parameter types
>     for the assembly functions.
> 

Reviewed-by: Eric Biggers <ebiggers@...nel.org>

- Eric