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iio: adc: ti-ads1119: 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 has a hole between the sample (unsigned int)
and the timestamp. This hole is never initialized.

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

Cc: stable@vger.kernel.org
Fixes: a9306887eb ("iio: adc: ti-ads1119: Add driver")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-2-0cb6e98d895c@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco
2024-11-25 22:16:10 +01:00
committed by Jonathan Cameron
parent 6007d10c52
commit 75f339d3ec
1 changed files with 2 additions and 0 deletions
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2
drivers/iio/adc/ti-ads1119.c
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@@ -506,6 +506,8 @@ static irqreturn_t ads1119_trigger_handler(int irq, void *private)
unsigned int index;
int ret;
memset(&scan, 0, sizeof(scan));
if (!iio_trigger_using_own(indio_dev)) {
index = find_first_bit(indio_dev->active_scan_mask,
iio_get_masklength(indio_dev));