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Date: Mon, 29 Jun 2026 02:50:44 +0000
From: Tzung-Bi Shih <tzungbi@kernel.org>
To: hexlabsecurity@proton.me
Cc: Benson Leung <bleung@chromium.org>, chrome-platform@lists.linux.dev,
	Guenter Roeck <groeck@chromium.org>,
	Gwendal Grignou <gwendal@chromium.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] platform/chrome: sensorhub: bound the EC-reported
 sensor number
Message-ID: <akHdhHQsc0si8Jor@google.com>
References: <20260618-b4-disp-adb3f790-v3-1-3a164ed63cbd@proton.me>
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In-Reply-To: <20260618-b4-disp-adb3f790-v3-1-3a164ed63cbd@proton.me>

On Thu, Jun 18, 2026 at 12:46:28AM -0500, Bryam Vargas via B4 Relay wrote:
> From: Bryam Vargas <hexlabsecurity@proton.me>
> 
> Each EC FIFO event carries an 8-bit sensor number (in->sensor_num).
> cros_ec_sensorhub_ring_handler() validates the FIFO event count, the
> per-read count and the ring bound, but not the sensor number, which
> cros_ec_sensor_ring_process_event() then uses unchecked to index
> sensorhub->batch_state[] - allocated with only sensorhub->sensor_num
> entries. A sensor number of sensor_num or larger is an out-of-bounds
> read and write of batch_state[].
> 
> [...]

Applied to

    https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-next

[1/1] platform/chrome: sensorhub: bound the EC-reported sensor number
      commit: 833740a2333c2e4db4e02e3d0ffba04e8718a5f3

Thanks!