linux-hardening - Re: [PATCH] libertas_tf: Use struct

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Date:   Mon, 29 Nov 2021 10:45:05 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Kees Cook <keescook@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        YueHaibing <yuehaibing@...wei.com>,
        Wan Jiabing <wanjiabing@...o.com>,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] libertas_tf: Use struct_group() for memcpy() region

Kees Cook <keescook@...omium.org> wrote:

> In preparation for FORTIFY_SOURCE performing compile-time and run-time
> field array bounds checking for memcpy(), memmove(), and memset(),
> avoid intentionally writing across neighboring fields.
> 
> Use struct_group() in struct txpd around members tx_dest_addr_high
> and tx_dest_addr_low so they can be referenced together. This will
> allow memcpy() and sizeof() to more easily reason about sizes, improve
> readability, and avoid future warnings about writing beyond the end
> of tx_dest_addr_high.
> 
> "pahole" shows no size nor member offset changes to struct txpd.
> "objdump -d" shows no object code changes.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>

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

642a57475b30 libertas_tf: Use struct_group() for memcpy() region

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211118184121.1283821-1-keescook@chromium.org/

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