6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nuno Sa nuno.sa@analog.com
commit 3a4187ec454e19903fd15f6e1825a4b84e59a4cd upstream.
The AD7923 was updated to support devices with 8 channels, but the size of tx_buf and ring_xfer was not increased accordingly, leading to a potential buffer overflow in ad7923_update_scan_mode().
Fixes: 851644a60d20 ("iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928") Cc: stable@vger.kernel.org Signed-off-by: Nuno Sa nuno.sa@analog.com Signed-off-by: Zicheng Qu quzicheng@huawei.com Link: https://patch.msgid.link/20241029134637.2261336-1-quzicheng@huawei.com Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/adc/ad7923.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/adc/ad7923.c +++ b/drivers/iio/adc/ad7923.c @@ -48,7 +48,7 @@
struct ad7923_state { struct spi_device *spi; - struct spi_transfer ring_xfer[5]; + struct spi_transfer ring_xfer[9]; struct spi_transfer scan_single_xfer[2]; struct spi_message ring_msg; struct spi_message scan_single_msg; @@ -64,7 +64,7 @@ struct ad7923_state { * Length = 8 channels + 4 extra for 8 byte timestamp */ __be16 rx_buf[12] __aligned(IIO_DMA_MINALIGN); - __be16 tx_buf[4]; + __be16 tx_buf[8]; };
struct ad7923_chip_info {