From: Javier Carrasco javier.carrasco.cruz@gmail.com
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@vger.kernel.org Fixes: 4e130dc7b413 ("iio: adc: rockchip_saradc: Add support iio buffers") Signed-off-by: Javier Carrasco javier.carrasco.cruz@gmail.com Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-4-0cb6e98d895c@gm... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com (cherry picked from commit 38724591364e1e3b278b4053f102b49ea06ee17c) Signed-off-by: Bin Lan lanbincn@qq.com --- 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 b87ea7148b58..0861885fa2a5 100644 --- a/drivers/iio/adc/rockchip_saradc.c +++ b/drivers/iio/adc/rockchip_saradc.c @@ -270,6 +270,8 @@ 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) {