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| author | Colin Ian King <colin.king@canonical.com> | 2020-01-21 19:17:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-23 11:38:24 +0300 |
| commit | f05e96fcc81b62e74cfb4de5fd42ddd15ccbbc75 (patch) | |
| tree | fe9f8b4ef6a8aa49b879238e70074b79b68692a9 | |
| parent | 50167bd50b7896ef34e2b783f6f1bcca1eda776e (diff) | |
| download | linux-f05e96fcc81b62e74cfb4de5fd42ddd15ccbbc75.tar.xz | |
iio: st_sensors: handle memory allocation failure to fix null pointer dereference
commit 9960c70949d4356abed8747a20637e0946bb0bad upstream.
A null pointer deference on pdata can occur if the allocation of
pdata fails. Fix this by adding a null pointer check and handle
the -ENOMEM failure in the caller.
Addresses-Coverity: ("Dereference null return value")
Fixes: 3ce85cc4fbb7 ("iio: st_sensors: get platform data from device tree")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/iio/common/st_sensors/st_sensors_core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index e051edbc43c1..0e35ff06f9af 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -328,6 +328,8 @@ static struct st_sensors_platform_data *st_sensors_dev_probe(struct device *dev, return NULL; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); if (!device_property_read_u32(dev, "st,drdy-int-pin", &val) && (val <= 2)) pdata->drdy_int_pin = (u8) val; else @@ -371,6 +373,8 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev, /* If OF/DT pdata exists, it will take precedence of anything else */ of_pdata = st_sensors_dev_probe(indio_dev->dev.parent, pdata); + if (IS_ERR(of_pdata)) + return PTR_ERR(of_pdata); if (of_pdata) pdata = of_pdata; |