From: Zicheng Qu <quzicheng@huawei.com> stable inclusion from stable-v6.6.60 commit 3dc0eda2cd5c653b162852ae5f0631bfe4ca5e95 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IB37AV CVE: CVE-2024-50232 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... ------------------------------------------------- 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@vger.kernel.org Fixes: 7b8d045e497a ("iio: adc: ad7124: allow more than 8 channels") Signed-off-by: Zicheng Qu <quzicheng@huawei.com> Reviewed-by: Nuno Sa <nuno.sa@analog.com> Link: https://patch.msgid.link/20241022134330.574601-1-quzicheng@huawei.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yipeng Zou <zouyipeng@huawei.com> --- drivers/iio/adc/ad7124.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index d2fe0269b6d3..34e06e2e51d6 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -643,7 +643,7 @@ static int ad7124_write_raw(struct iio_dev *indio_dev, switch (info) { case IIO_CHAN_INFO_SAMP_FREQ: - if (val2 != 0) { + if (val2 != 0 || val == 0) { ret = -EINVAL; break; } -- 2.34.1