From: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
commit 38724591364e1e3b278b4053f102b49ea06ee17c upstream.
The 'data' 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@xxxxxxxxxxxxxxx
Fixes: 4e130dc7b413 ("iio: adc: rockchip_saradc: Add support iio buffers")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-4-0cb6e98d895c@xxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
(cherry picked from commit 38724591364e1e3b278b4053f102b49ea06ee17c)
Signed-off-by: Bin Lan <lanbincn@xxxxxx>
---
drivers/iio/adc/rockchip_saradc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 12584f1631d8..deb58e232770 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -254,6 +254,8 @@ static irqreturn_t rockchip_saradc_trigger_handler(int irq, void *p)
int ret;
int i, j = 0;
+ memset(&data, 0, sizeof(data));
+
mutex_lock(&i_dev->mlock);
for_each_set_bit(i, i_dev->active_scan_mask, i_dev->masklength) {
--
2.43.0
