linux-kernel - [ 14/49] HID: lenovo-tpkbd: fix leak if tpkbd_probe

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Date:	Sun, 29 Sep 2013 12:26:48 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>
Subject: [ 14/49] HID: lenovo-tpkbd: fix leak if tpkbd_probe_tp fails

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Benjamin Tissoires <benjamin.tissoires@...hat.com>

commit 0ccdd9e7476680c16113131264ad6597bd10299d upstream.

If tpkbd_probe_tp() bails out, the probe() function return an error,
but hid_hw_stop() is never called.

fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1003998

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hid/hid-lenovo-tpkbd.c |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

--- a/drivers/hid/hid-lenovo-tpkbd.c
+++ b/drivers/hid/hid-lenovo-tpkbd.c
@@ -406,22 +406,27 @@ static int tpkbd_probe(struct hid_device
 	ret = hid_parse(hdev);
 	if (ret) {
 		hid_err(hdev, "hid_parse failed\n");
-		goto err_free;
+		goto err;
 	}
 
 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 	if (ret) {
 		hid_err(hdev, "hid_hw_start failed\n");
-		goto err_free;
+		goto err;
 	}
 
 	uhdev = (struct usbhid_device *) hdev->driver_data;
 
-	if (uhdev->ifnum == 1)
-		return tpkbd_probe_tp(hdev);
+	if (uhdev->ifnum == 1) {
+		ret = tpkbd_probe_tp(hdev);
+		if (ret)
+			goto err_hid;
+	}
 
 	return 0;
-err_free:
+err_hid:
+	hid_hw_stop(hdev);
+err:
 	return ret;
 }
 


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