linux-hardening - Re: [PATCH][next] bcachefs: Replace zero-length arrays with flexible-array members

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Date: Wed, 29 Nov 2023 14:25:36 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: Kees Cook <keescook@...omium.org>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Kent Overstreet <kent.overstreet@...ux.dev>,
 Brian Foster <bfoster@...hat.com>, linux-bcachefs@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] bcachefs: Replace zero-length arrays with
 flexible-array members

On 11/29/23 14:15, Kees Cook wrote:
> On Tue, Nov 28, 2023 at 12:22:55PM -0600, Gustavo A. R. Silva wrote:
>> Fake flexible arrays (zero-length and one-element arrays) are
>> deprecated, and should be replaced by flexible-array members.
>>
>> So, replace zero-length arrays with flexible-array members
>> in multiple structures.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> 
> These look like straight-forward conversions. Thanks!

Yep, these also fix a buch of -Warray-bounds warnings reported
by 0-day:

https://lore.kernel.org/lkml/202311290720.TzNYq81c-lkp@intel.com/

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

Thanks!
--
Gustavo