linux-kernel - [ 084/105] USB: sierra: fix memory leak in attach error path

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Date:	Sun, 28 Oct 2012 23:17:00 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Johan Hovold <jhovold@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [ 084/105] USB: sierra: fix memory leak in attach error path

3.2-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>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/usb/serial/sierra.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 76ef95b..2cb27e4 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -905,7 +905,7 @@ static int sierra_startup(struct usb_serial *serial)
 			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);
@@ -942,6 +942,13 @@ static int sierra_startup(struct usb_serial *serial)
 	}
 
 	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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