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leds: pca9532: fix a potential NULL pointer dereference

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[ Upstream commit 0aab8e4df4 ]

In case of_match_device cannot find a match, return -EINVAL to avoid
NULL pointer dereference.

Fixes: fa4191a609 ("leds: pca9532: Add device tree support")
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
This commit is contained in:
Kangjie Lu
2019-03-09 00:04:11 -06:00
committed by Greg Kroah-Hartman
parent 13103fc1d5
commit b491c6f370
1 changed files with 6 additions and 2 deletions
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8
drivers/leds/leds-pca9532.c
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@@ -488,6 +488,7 @@ static int pca9532_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int devid;
const struct of_device_id *of_id;
struct pca9532_data *data = i2c_get_clientdata(client);
struct pca9532_platform_data *pca9532_pdata =
dev_get_platdata(&client->dev);
@@ -503,8 +504,11 @@ static int pca9532_probe(struct i2c_client *client,
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
devid = (int)(uintptr_t)of_match_device(
of_pca9532_leds_match, &client->dev)->data;
of_id = of_match_device(of_pca9532_leds_match,
&client->dev);
if (unlikely(!of_id))
return -EINVAL;
devid = (int)(uintptr_t) of_id->data;
} else {
devid = id->driver_data;
}