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iio: light: bh1745: fix information leak in triggered buffer

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The 'scan' local struct is used to push data to user space from a
triggered buffer, but it does not set values for inactive channels, as
it only uses iio_for_each_active_channel() to assign new values.

Initialize the struct to zero before using it to avoid pushing
uninitialized information to userspace.

Cc: stable@vger.kernel.org
Fixes: eab35358aa ("iio: light: ROHM BH1745 colour sensor")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-7-0cb6e98d895c@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco 2024-11-25 22:16:15 +01:00 committed by Jonathan Cameron
parent 2a7377ccfd
commit b62fbe3b8e
1 changed files with 2 additions and 0 deletions
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2
drivers/iio/light/bh1745.c
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@ -746,6 +746,8 @@ static irqreturn_t bh1745_trigger_handler(int interrupt, void *p)
int i;
int j = 0;
memset(&scan, 0, sizeof(scan));
iio_for_each_active_channel(indio_dev, i) {
ret = regmap_bulk_read(data->regmap, BH1745_RED_LSB + 2 * i,
&value, 2);