linux-hardening - Re: [v2] wifi: iwlwifi: Track scan

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Message-ID: <166434745921.25202.14807122782914947195.kvalo@kernel.org>
Date:   Wed, 28 Sep 2022 06:44:23 +0000 (UTC)
From:   Kalle Valo <kvalo@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Gregory Greenman <gregory.greenman@...el.com>,
        Kees Cook <keescook@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Miri Korenblit <miriam.rachel.korenblit@...el.com>,
        Ilan Peer <ilan.peer@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Nathan Errera <nathan.errera@...el.com>,
        Mordechay Goodstein <mordechay.goodstein@...el.com>,
        Mike Golant <michael.golant@...el.com>,
        Ayala Beker <ayala.beker@...el.com>,
        Avraham Stern <avraham.stern@...el.com>,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [v2] wifi: iwlwifi: Track scan_cmd allocation size explicitly

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

> In preparation for reducing the use of ksize(), explicitly track the
> size of scan_cmd allocations. This also allows for noticing if the scan
> size changes unexpectedly. Note that using ksize() was already incorrect
> here, in the sense that ksize() would not match the actual allocation
> size, which would trigger future run-time allocation bounds checking.
> (In other words, memset() may know how large scan_cmd was allocated for,
> but ksize() will return the upper bounds of the actually allocated memory,
> causing a run-time warning about an overflow.)
> 
> Cc: Gregory Greenman <gregory.greenman@...el.com>
> Cc: Kalle Valo <kvalo@...nel.org>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Luca Coelho <luciano.coelho@...el.com>
> Cc: Johannes Berg <johannes.berg@...el.com>
> Cc: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
> Cc: Miri Korenblit <miriam.rachel.korenblit@...el.com>
> Cc: Ilan Peer <ilan.peer@...el.com>
> Cc: linux-wireless@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Patch applied to wireless-next.git, thanks.

72c08d9f4c72 wifi: iwlwifi: Track scan_cmd allocation size explicitly

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20220923220853.3302056-1-keescook@chromium.org/

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