Re: [PATCH v2] iwlwifi: Track scan_cmd allocation size explicitly

[Kalle Valo <kvalo@kernel.org>]

Kees Cook <keescook@chromium.org> writes:

> 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@intel.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: Luca Coelho <luciano.coelho@intel.com>
> Cc: Johannes Berg <johannes.berg@intel.com>
> Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
> Cc: Miri Korenblit <miriam.rachel.korenblit@intel.com>
> Cc: Ilan Peer <ilan.peer@intel.com>
> Cc: linux-wireless@vger.kernel.org
> Cc: netdev@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>

Gregory, can I take this directly to wireless-next?

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