Commit 479180ee authored by Javier Carrasco's avatar Javier Carrasco Committed by Wen Zhiwei
Browse files

iio: imu: kmx61: fix information leak in triggered buffer 

stable inclusion
from stable-v6.6.72
commit cde312e257b59ecaa0fad3af9ec7e2370bb24639
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IBQN9L

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=cde312e257b59ecaa0fad3af9ec7e2370bb24639



--------------------------------

commit 6ae053113f6a226a2303caa4936a4c37f3bfff7b upstream.

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: c3a23ecc ("iio: imu: kmx61: Add support for data ready triggers")
Signed-off-by: default avatarJavier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-5-0cb6e98d895c@gmail.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarWen Zhiwei <wenzhiwei@kylinos.cn>
parent aea30895

drivers/iio/imu/kmx61.c

+1 −1
Original line number Diff line number Diff line
@@ -1192,7 +1192,7 @@ 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;