HID: potential dereference of null pointer

commit 13251ce1dd9bb525da2becb9b26fdfb94ca58659 upstream.

The return value of devm_kzalloc() needs to be checked.
To avoid hdev->dev->driver_data to be null in case of the failure of
alloc.

Fixes: 14c9c014babe ("HID: add vivaldi HID driver")
Cc: stable@vger.kernel.org
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211215083605.117638-1-jiasheng@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hid/hid-vivaldi.c b/drivers/hid/hid-vivaldi.c
index cd7ada4..72957a9 100644 (file)
--- a/drivers/hid/hid-vivaldi.c
+++ b/drivers/hid/hid-vivaldi.c
@@ -57,6 +57,9 @@ static int vivaldi_probe(struct hid_device *hdev,
        int ret;
 
        drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
+       if (!drvdata)
+               return -ENOMEM;
+
        hid_set_drvdata(hdev, drvdata);
 
        ret = hid_parse(hdev);