From: Kees Cook <keescook@chromium.org>
To: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Cc: linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org,
; Johannes Berg <johannes.berg@intel.com>
Subject: Re: [PATCH] uapi: wireless: Replace zero-length array with flexible-array member
Date: Wed, 16 Feb 2022 12:36:27 -0800 [thread overview]
Message-ID: <202202161235.C593433C94@keescook> (raw)
In-Reply-To: <20220216195306.GA904220@embeddedor>
On Wed, Feb 16, 2022 at 01:53:06PM -0600, Gustavo A. R. Silva wrote:
> There is a regular need in the kernel to provide a way to declare
> having a dynamically sized set of trailing elements in a structure.
> Kernel code should always use “flexible array members”[1] for these
> cases. The older style of one-element or zero-length arrays should
> no longer be used[2].
>
> [1] https://en.wikipedia.org/wiki/Flexible_array_member
> [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
>
> Link: https://github.com/KSPP/linux/issues/78
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
This UAPI change should be fine for any compiler that understood the
older "[0]" syntax.
Reviewed-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2022-02-16 20:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-16 19:53 [PATCH] uapi: wireless: Replace zero-length array with flexible-array member Gustavo A. R. Silva
2022-02-16 20:36 ` Kees Cook [this message]
2022-03-26 0:42 ` Gustavo A. R. Silva
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