linux-kernel - Re: [PATCH][next] exportfs: Replace zero-length array with DECLARE_FLEX

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Message-ID: <202209022209.ABAD4C8899@keescook>
Date:   Fri, 2 Sep 2022 22:10:01 -0700
From:   Kees Cook <keescook@...omium.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Cc: linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        ;
Subject: Re: [PATCH][next] exportfs: Replace zero-length array with
 DECLARE_FLEX_ARRAY() helper

On Sat, Sep 03, 2022 at 12:08:51AM +0100, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated and we are moving towards adopting
> C99 flexible-array members instead. So, replace zero-length array
> declaration in struct fid with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for a flexible-array member in a union.
> 
> Link: https://github.com/KSPP/linux/issues/21
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/197
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook