linux-hardening - Re: [PATCH] ath11k: Use memset_startat() for clearing queue descriptors

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Message-ID: <163777372886.11557.5551795598856429949.kvalo@codeaurora.org>
Date:   Wed, 24 Nov 2021 17:08:53 +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>, linux-kernel@...r.kernel.org,
        ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] ath11k: Use memset_startat() for clearing queue
 descriptors

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

> In preparation for FORTIFY_SOURCE performing compile-time and run-time
> field bounds checking for memset(), avoid intentionally writing across
> neighboring fields.
> 
> Use memset_startat() so memset() doesn't get confused about writing
> beyond the destination member that is intended to be the starting point
> of zeroing through the end of the struct. Additionally split up a later
> field-spanning memset() so that memset() can reason about the size.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

d5549e9a6b86 ath11k: Use memset_startat() for clearing queue descriptors

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211118202416.1286046-1-keescook@chromium.org/

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