[ 3.5.yuz extended stable ] Patch "USB: sierra: fix memory leak in probe error path" has been added to staging queue

[Herton Ronaldo Krzesinski]

This is a note to let you know that I have just added a patch titled

    USB: sierra: fix memory leak in probe error path

to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.yuz tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

>From ba39d8a6d2fcce68ac91c124cb7ecc42dd294685 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold at gmail.com>
Date: Thu, 25 Oct 2012 10:29:18 +0200
Subject: [PATCH] USB: sierra: fix memory leak in probe error path

commit 084817d79399ab5ccab2f90a148b0369912a8369 upstream.

Move interface data allocation to attach so that it is deallocated on
errors in usb-serial probe.

Signed-off-by: Johan Hovold <jhovold at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 drivers/usb/serial/sierra.c |   16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index f72bbaa..6aeddcd 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -162,7 +162,6 @@ static int sierra_probe(struct usb_serial *serial,
 {
 	int result = 0;
 	struct usb_device *udev;
-	struct sierra_intf_private *data;
 	u8 ifnum;

 	udev = serial->dev;
@@ -189,11 +188,6 @@ static int sierra_probe(struct usb_serial *serial,
 		return -ENODEV;
 	}

-	data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-	spin_lock_init(&data->susp_lock);
-
 	return result;
 }

@@ -890,11 +884,20 @@ static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 static int sierra_startup(struct usb_serial *serial)
 {
 	struct usb_serial_port *port;
+	struct sierra_intf_private *intfdata;
 	struct sierra_port_private *portdata;
 	struct sierra_iface_info *himemoryp = NULL;
 	int i;
 	u8 ifnum;

+	intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
+	if (!intfdata)
+		return -ENOMEM;
+
+	spin_lock_init(&intfdata->susp_lock);
+
+	usb_set_serial_data(serial, intfdata);
+
 	/* Set Device mode to D0 */
 	sierra_set_power_state(serial->dev, 0x0000);

@@ -952,6 +955,7 @@ err:
 		portdata = usb_get_serial_port_data(serial->port[i]);
 		kfree(portdata);
 	}
+	kfree(intfdata);

 	return -ENOMEM;
 }
--
1.7.9.5