linux-kernel - [PATCH 1/3] HID: thrustmaster: Fix memory leaks in probe

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Message-Id: <20210730165110.24667-1-novikov@ispras.ru>
Date:   Fri, 30 Jul 2021 19:51:08 +0300
From:   Evgeny Novikov <novikov@...ras.ru>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Evgeny Novikov <novikov@...ras.ru>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-input@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH 1/3] HID: thrustmaster: Fix memory leaks in probe

When thrustmaster_probe() handles errors of usb_submit_urb() it does not
free allocated resources and fails. The patch fixes that.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@...ras.ru>
---
 drivers/hid/hid-thrustmaster.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-thrustmaster.c b/drivers/hid/hid-thrustmaster.c
index cdc7d82ae9ed..e94d3409fd10 100644
--- a/drivers/hid/hid-thrustmaster.c
+++ b/drivers/hid/hid-thrustmaster.c
@@ -336,11 +336,14 @@ static int thrustmaster_probe(struct hid_device *hdev, const struct hid_device_i
 	);
 
 	ret = usb_submit_urb(tm_wheel->urb, GFP_ATOMIC);
-	if (ret)
+	if (ret) {
 		hid_err(hdev, "Error %d while submitting the URB. I am unable to initialize this wheel...\n", ret);
+		goto error6;
+	}
 
 	return ret;
 
+error6: kfree(tm_wheel->change_request);
 error5: kfree(tm_wheel->response);
 error4: kfree(tm_wheel->model_request);
 error3: usb_free_urb(tm_wheel->urb);
-- 
2.26.2