From: Zicheng Qu <quzicheng@xxxxxxxxxx>
commit efa353ae1b0541981bc96dbf2e586387d0392baa upstream.
In the ad7124_write_raw() function, parameter val can potentially
be zero. This may lead to a division by zero when DIV_ROUND_CLOSEST()
is called within ad7124_set_channel_odr(). The ad7124_write_raw()
function is invoked through the sequence: iio_write_channel_raw() ->
iio_write_channel_attribute() -> iio_channel_write(), with no checks
in place to ensure val is non-zero.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 7b8d045e497a ("iio: adc: ad7124: allow more than 8 channels")
Signed-off-by: Zicheng Qu <quzicheng@xxxxxxxxxx>
Reviewed-by: Nuno Sa <nuno.sa@xxxxxxxxxx>
Link: https://patch.msgid.link/20241022134330.574601-1-quzicheng@xxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/adc/ad7124.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -596,7 +596,7 @@ static int ad7124_write_raw(struct iio_d
switch (info) {
case IIO_CHAN_INFO_SAMP_FREQ:
- if (val2 != 0) {
+ if (val2 != 0 || val == 0) {
ret = -EINVAL;
break;
}
Patches currently in stable-queue which might be from quzicheng@xxxxxxxxxx are
queue-5.15/iio-adc-ad7124-fix-division-by-zero-in-ad7124_set_channel_odr.patch
queue-5.15/staging-iio-frequency-ad9832-fix-division-by-zero-in-ad9832_calc_freqreg.patch
