linux-kernel - Re: [PATCH] iio: adc: mcp3911: Fix out of bounds access of array mcp3911_osr

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Date:   Wed, 12 Oct 2022 15:52:15 +0200
From:   Marcus Folkesson <marcus.folkesson@...il.com>
To:     Colin Ian King <colin.i.king@...il.com>
Cc:     Kent Gustavsson <kent@...oris.se>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-iio@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: adc: mcp3911: Fix out of bounds access of array
 mcp3911_osr_table

Hi Colin,

On Wed, Oct 12, 2022 at 02:42:45PM +0100, Colin Ian King wrote:
> Currently the for-loop is using the size of the array mcp3911_osr_table
> as the upper bounds which is 0..31 which is causing an out of bounds
> access to the array at indexes 8..31. Fix this using the ARRAY_SIZE
> macro to get the size of the array in elements rather than bytes.
> 
> Fixes: 6d965885f4ea ("iio: adc: mcp3911: add support for oversampling ratio")
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Thank you for the patch!

Dan was a little bit earlier to catch this though
https://lore.kernel.org/all/20221002132053.113f595f@jic23-huawei/

Best regards,
Marcus Folkesson

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