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[05/11] iio: imu: kmx61: fix information leak in triggered buffer

Message ID 20241125-iio_memset_scan_holes-v1-5-0cb6e98d895c@gmail.com (mailing list archive)
State New
Headers show
Series iio: fix information leaks in triggered buffers | expand

Commit Message

Javier Carrasco Nov. 25, 2024, 9:16 p.m. UTC 
The 'buffer' local array 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 array to zero before using it to avoid pushing
uninitialized information to userspace.

Cc: stable@vger.kernel.org
Fixes: c3a23ecc0901 ("iio: imu: kmx61: Add support for data ready triggers")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/iio/imu/kmx61.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c
index 324c38764656..e19c5d3137c6 100644
--- a/drivers/iio/imu/kmx61.c
+++ b/drivers/iio/imu/kmx61.c
@@ -1193,7 +1193,7 @@  static irqreturn_t kmx61_trigger_handler(int irq, void *p)
 	struct kmx61_data *data = kmx61_get_data(indio_dev);
 	int bit, ret, i = 0;
 	u8 base;
-	s16 buffer[8];
+	s16 buffer[8] = { };
 
 	if (indio_dev == data->acc_indio_dev)
 		base = KMX61_ACC_XOUT_L;