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

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Message-ID: <20231129211254.45yu4ghc2wg5d4w5@moria.home.lan>
Date: Wed, 29 Nov 2023 16:12:54 -0500
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Brian Foster <bfoster@...hat.com>, linux-bcachefs@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH][next] bcachefs: Replace zero-length arrays with
 flexible-array members

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>

There are some ZLAs I hadn't converted because they led to new warnings
- in particular, array of flexible members.

I don't think that applies to any of the ones you changed
(replicas_delta_list, maybe?) - but it's something we need to figure
out if we're getting serious about this.