linux/drivers/iio/health
Wei Yongjun 58143c1ed5 iio: health: afe4403: Fix oob read in afe4403_read_raw
KASAN report out-of-bounds read as follows:

BUG: KASAN: global-out-of-bounds in afe4403_read_raw+0x42e/0x4c0
Read of size 4 at addr ffffffffc02ac638 by task cat/279

Call Trace:
 afe4403_read_raw
 iio_read_channel_info
 dev_attr_show

The buggy address belongs to the variable:
 afe4403_channel_leds+0x18/0xffffffffffffe9e0

This issue can be reproduced by singe command:

 $ cat /sys/bus/spi/devices/spi0.0/iio\:device0/in_intensity6_raw

The array size of afe4403_channel_leds is less than channels, so access
with chan->address cause OOB read in afe4403_read_raw. Fix it by moving
access before use it.

Fixes: b36e825764 ("iio: health/afe440x: Use regmap fields")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20221107151946.89260-1-weiyongjun@huaweicloud.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-11-12 16:29:57 +00:00
..
afe440x.h Replace HTTP links with HTTPS ones: drivers/iio 2020-07-13 15:05:59 +01:00
afe4403.c iio: health: afe4403: Fix oob read in afe4403_read_raw 2022-11-12 16:29:57 +00:00
afe4404.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
max30100.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
max30102.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00