linux-kernel - Re: [PATCH][next] mwifiex: usb: Replace one-element array with flexible-array member

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Message-Id: <20210821175012.D0717C43460@smtp.codeaurora.org>
Date:   Sat, 21 Aug 2021 17:50:12 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi017@...il.com>,
        Sharvari Harisangam <sharvari.harisangam@....com>,
        Xinming Hu <huxinming820@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] mwifiex: usb: Replace one-element array with
 flexible-array member

"Gustavo A. R. Silva" <gustavoars@...nel.org> 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].
> 
> This helps with the ongoing efforts to globally enable -Warray-bounds
> and get us closer to being able to tighten the FORTIFY_SOURCE routines
> on memcpy().
> 
> This issue was found with the help of Coccinelle and audited and fixed,
> manually.
> 
> [1] https://en.wikipedia.org/wiki/Flexible_array_member
> [2] https://www.kernel.org/doc/html/v5.10/process/deprecated.html#zero-length-and-one-element-arrays
> 
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/109
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> Reviewed-by: Brian Norris <briannorris@...omium.org>

Patch applied to wireless-drivers-next.git, thanks.

090f2c5d3d07 mwifiex: usb: Replace one-element array with flexible-array member

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210809211134.GA22488@embeddedor/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches