[PATCH 03/11] iio: pressure: zpa2326: fix information leak in triggered buffer

[Javier Carrasco]

The 'sample' local struct is used to push data to user space from a
triggered buffer, but it has a hole between the temperature and the
timestamp (u32 pressure, u16 temperature, GAP, u64 timestamp).
This hole is never initialized.

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

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
---
 drivers/iio/pressure/zpa2326.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
index 950f8dee2b26..b4c6c7c47256 100644
--- a/drivers/iio/pressure/zpa2326.c
+++ b/drivers/iio/pressure/zpa2326.c
@@ -586,6 +586,8 @@ static int zpa2326_fill_sample_buffer(struct iio_dev               *indio_dev,
 	}   sample;
 	int err;
 
+	memset(&sample, 0, sizeof(sample));
+
 	if (test_bit(0, indio_dev->active_scan_mask)) {
 		/* Get current pressure from hardware FIFO. */
 		err = zpa2326_dequeue_pressure(indio_dev, &sample.pressure);

-- 
2.43.0