5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Javier Carrasco javier.carrasco.cruz@gmail.com
commit 6007d10c5262f6f71479627c1216899ea7f09073 upstream.
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@vger.kernel.org Fixes: 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support") Signed-off-by: Javier Carrasco javier.carrasco.cruz@gmail.com Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-3-0cb6e98d895c@gm... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/pressure/zpa2326.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/iio/pressure/zpa2326.c +++ b/drivers/iio/pressure/zpa2326.c @@ -585,6 +585,8 @@ static int zpa2326_fill_sample_buffer(st } 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);