linux-kernel - Re: [PATCH] crypto: marvell/cesa

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Date:   Tue, 30 May 2023 15:48:49 -0700
From:   Kees Cook <keescook@...omium.org>
To:     arno@...isbad.org, arnd@...nel.org, schalla@...vell.com,
        Herbert Xu <herbert@...dor.apana.org.au>,
        bbrezillon@...nel.org, davem@...emloft.net
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>, linux-crypto@...r.kernel.org
Subject: Re: [PATCH] crypto: marvell/cesa - Fix type mismatch warning

On Tue, 23 May 2023 10:33:04 +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Commit df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") uncovered
> a type mismatch in cesa 3des support that leads to a memcpy beyond the
> end of a structure:
> 
> In function 'fortify_memcpy_chk',
>     inlined from 'mv_cesa_des3_ede_setkey' at drivers/crypto/marvell/cesa/cipher.c:307:2:
> include/linux/fortify-string.h:583:25: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
>   583 |                         __write_overflow_field(p_size_field, size);
>       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] crypto: marvell/cesa - Fix type mismatch warning
      https://git.kernel.org/kees/c/37f3abddda8d

-- 
Kees Cook