linux-hardening - Re: [PATCH][next] mm/memremap: Replace zero-length array with DECLARE_FLEX

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <202209022210.37E37186@keescook>
Date:   Fri, 2 Sep 2022 22:10:31 -0700
From:   Kees Cook <keescook@...omium.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] mm/memremap: Replace zero-length array with
 DECLARE_FLEX_ARRAY() helper

On Sat, Sep 03, 2022 at 12:17:18AM +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 dev_pagemap with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for a flexible-array member in a union.
> 
> Also, this addresses multiple warnings reported when building
> with Clang-15 and -Wzero-length-array.
> 
> Link: https://github.com/KSPP/linux/issues/193
> 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