linux-kernel - [PATCH 5.4 102/110] rsi: fix memory leak on failed URB submission

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Message-Id: <20200130183625.718011784@linuxfoundation.org>
Date:   Thu, 30 Jan 2020 19:39:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Prameela Rani Garnepudi <prameela.j04cs@...il.com>,
        Johan Hovold <johan@...nel.org>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 5.4 102/110] rsi: fix memory leak on failed URB submission

From: Johan Hovold <johan@...nel.org>

commit 47768297481184932844ab01a86752ba31a38861 upstream.

Make sure to free the skb on failed receive-URB submission (e.g. on
disconnect or currently also due to a missing endpoint).

Fixes: a1854fae1414 ("rsi: improve RX packet handling in USB interface")
Cc: stable <stable@...r.kernel.org>     # 4.17
Cc: Prameela Rani Garnepudi <prameela.j04cs@...il.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/rsi/rsi_91x_usb.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/rsi/rsi_91x_usb.c
+++ b/drivers/net/wireless/rsi/rsi_91x_usb.c
@@ -338,8 +338,10 @@ static int rsi_rx_urb_submit(struct rsi_
 			  rx_cb);
 
 	status = usb_submit_urb(urb, GFP_KERNEL);
-	if (status)
+	if (status) {
 		rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
+		dev_kfree_skb(skb);
+	}
 
 	return status;
 }