linux-hardening - Re: [PATCH 075/141] crypto: ccree - Fix fall-through warnings for Clang

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Message-ID: <CAOtvUMeLZXChtoEUNyy=hwHQDqqncUX5V_=JSH3YaiVNLyTcHw@mail.gmail.com>
Date:   Sun, 22 Nov 2020 09:54:29 +0200
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH 075/141] crypto: ccree - Fix fall-through warnings for Clang

On Fri, Nov 20, 2020 at 8:34 PM Gustavo A. R. Silva
<gustavoars@...nel.org> wrote:
>
> In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
> warnings by explicitly adding multiple break statements instead of
> letting the code fall through to the next case.
>
> Link: https://github.com/KSPP/linux/issues/115
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
>  drivers/crypto/ccree/cc_cipher.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/crypto/ccree/cc_cipher.c b/drivers/crypto/ccree/cc_cipher.c
> index dafa6577a845..cdfee501fbd9 100644
> --- a/drivers/crypto/ccree/cc_cipher.c
> +++ b/drivers/crypto/ccree/cc_cipher.c
> @@ -97,6 +97,7 @@ static int validate_keys_sizes(struct cc_cipher_ctx *ctx_p, u32 size)
>         case S_DIN_to_SM4:
>                 if (size == SM4_KEY_SIZE)
>                         return 0;
> +               break;
>         default:
>                 break;
>         }
> @@ -139,9 +140,11 @@ static int validate_data_size(struct cc_cipher_ctx *ctx_p,
>                 case DRV_CIPHER_CBC:
>                         if (IS_ALIGNED(size, SM4_BLOCK_SIZE))
>                                 return 0;
> +                       break;
>                 default:
>                         break;
>                 }
> +               break;
>         default:
>                 break;
>         }
> --
> 2.27.0
>

Acked-by: Gilad Ben-Yossef <gilad@...yossef.com>

Thanks,
Gilad

-- 
Gilad Ben-Yossef
Chief Coffee Drinker

values of β will give rise to dom!