linux-kernel - Re: [PATCH] fs/affs: struct slink_front: Replace 1-element array with flexible array

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Message-ID: <20240711142928.GB8022@suse.cz>
Date: Thu, 11 Jul 2024 16:29:28 +0200
From: David Sterba <dsterba@...e.cz>
To: Kees Cook <kees@...nel.org>
Cc: David Sterba <dsterba@...e.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] fs/affs: struct slink_front: Replace 1-element array
 with flexible array

On Wed, Jul 10, 2024 at 03:57:34PM -0700, Kees Cook wrote:
> Replace the deprecated[1] use of a 1-element array in
> struct slink_front with a modern flexible array.
> 
> No binary differences are present after this conversion.
> 
> Link: https://github.com/KSPP/linux/issues/79 [1]
> Signed-off-by: Kees Cook <kees@...nel.org>

Thanks, I've added the 3 patches to my tree. I've noticed there's one
more 1-element array in struct affs_root_head (hashtable):

https://elixir.bootlin.com/linux/latest/source/fs/affs/amigaffs.h#L50

The struct is used only partially by AFFS_ROOT_HEAD from affs_fill_super
and not accessing the hashtable. This could have been missed by the
tools you use or was the conversion intentionally skipped?