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iio: adc: ad7606: reject devices without match data

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SPI driver_override allows a device to bind to this driver without
matching either the OF or SPI device ID table. In that case,
spi_get_device_match_data() returns NULL.

ad7606_spi_probe() dereferences the returned bus information to pass
the chip information and bus operations to the core, causing a NULL
pointer dereference.

Commit 572a008526 ("iio: dac: ad5686: missing NULL check on match
data") fixed the same driver_override issue in another SPI driver.
Reject devices without match data before entering the core.

Fixes: bc69e9fffd ("iio: adc: ad7606: Add compatibility to fw_nodes")
Cc: stable@vger.kernel.org
Signed-off-by: Jiale Yao <yaojiale02@163.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Jiale Yao 2026-09-25 20:57:40 +08:00 committed by Jonathan Cameron
parent 7f7a119a37
commit 7830650d52
1 changed files with 5 additions and 1 deletions
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6
drivers/iio/adc/ad7606_spi.c
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@ -456,7 +456,11 @@ static const struct ad7606_bus_info ad7616_bus_info = {
static int ad7606_spi_probe(struct spi_device *spi)
{
const struct ad7606_bus_info *bus_info = spi_get_device_match_data(spi);
const struct ad7606_bus_info *bus_info;
bus_info = spi_get_device_match_data(spi);
if (!bus_info)
return -ENODATA;
return ad7606_probe(&spi->dev, spi->irq, NULL,
bus_info->chip_info, bus_info->bops);