linux-kernel - [ 28/54] USB: sierra: fix memory leak in attach error path

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Message-Id: <20121029213805.885742306@linuxfoundation.org>
Date:	Mon, 29 Oct 2012 14:40:29 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Johan Hovold <jhovold@...il.com>
Subject: [ 28/54] USB: sierra: fix memory leak in attach error path

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

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

From: Johan Hovold <jhovold@...il.com>

commit 7e41f9bcdd2e813ea2a3c40db291d87ea06b559f upstream.

Make sure port private data is deallocated on errors in attach.

Signed-off-by: Johan Hovold <jhovold@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/serial/sierra.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -936,7 +936,7 @@ static int sierra_startup(struct usb_ser
 			dev_dbg(&port->dev, "%s: kmalloc for "
 				"sierra_port_private (%d) failed!\n",
 				__func__, i);
-			return -ENOMEM;
+			goto err;
 		}
 		spin_lock_init(&portdata->lock);
 		init_usb_anchor(&portdata->active);
@@ -973,6 +973,13 @@ static int sierra_startup(struct usb_ser
 	}
 
 	return 0;
+err:
+	for (--i; i >= 0; --i) {
+		portdata = usb_get_serial_port_data(serial->port[i]);
+		kfree(portdata);
+	}
+
+	return -ENOMEM;
 }
 
 static void sierra_release(struct usb_serial *serial)


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