linux-hardening - Re: [PATCH v2][next] bcachefs: Avoid -Wflex-array-member-not-at-end warnings

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Message-ID: <zn74qlanwd3b4wmyecn7ostb6i42ceycaa2myijimfsrs3eglc@tsgoa3zbe6ue>
Date: Wed, 30 Apr 2025 15:35:42 -0400
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-bcachefs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2][next] bcachefs: Avoid -Wflex-array-member-not-at-end
 warnings

On Wed, Apr 30, 2025 at 01:22:01PM -0600, Gustavo A. R. Silva wrote:
> -Wflex-array-member-not-at-end was introduced in GCC-14, and we are
> getting ready to enable it, globally.
> 
> Refactor a couple of structs that contain flexible arrays in the
> middle by replacing them with unions.
> 
> So, with these changes, fix the following warnings:
> 
> fs/bcachefs/disk_accounting.c:429:51: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> fs/bcachefs/ec_types.h:8:41: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Applied. Presumably you only need this in 6.16?