[PATCH] usb: typec: stusb160x: add missing NULL check for i2c_get_match_data()

[Joshua Crofts <joshua.crofts1@gmail.com>]

In stusb160x_probe(), the return value of i2c_get_match_data() is not
checked, causing a null pointer dereference later on if the device was
registered manually (without devicetree or ACPI).

Fix this by adding a NULL check for the return value of
i2c_get_match_data().

Reported-by: syzbot+6c7e68b141ebd3a2cadf@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=6c7e68b141ebd3a2cadf
Fixes: 823754697556 ("usb: typec: stusb160x: Make use of i2c_get_match_data()")
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
---
 drivers/usb/typec/stusb160x.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/typec/stusb160x.c b/drivers/usb/typec/stusb160x.c
index 6d85b25b40bc..8f3435c669cd 100644
--- a/drivers/usb/typec/stusb160x.c
+++ b/drivers/usb/typec/stusb160x.c
@@ -645,6 +645,8 @@ static int stusb160x_probe(struct i2c_client *client)
 	i2c_set_clientdata(client, chip);
 
 	regmap_config = i2c_get_match_data(client);
+	if (!regmap_config)
+		return -ENODEV;
 
 	chip->regmap = devm_regmap_init_i2c(client, regmap_config);
 	if (IS_ERR(chip->regmap)) {
-- 
2.47.3