Patch "USB: sierra: fix urb and memory leak on disconnect" has been added to the 3.15-stable tree

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This is a note to let you know that I've just added the patch titled

    USB: sierra: fix urb and memory leak on disconnect

to the 3.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-sierra-fix-urb-and-memory-leak-on-disconnect.patch
and it can be found in the queue-3.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 014333f77c0b71123d6ef7d31a9724e0699c9548 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Mon, 26 May 2014 19:22:53 +0200
Subject: USB: sierra: fix urb and memory leak on disconnect

From: Johan Hovold <jhovold@xxxxxxxxx>

commit 014333f77c0b71123d6ef7d31a9724e0699c9548 upstream.

The delayed-write queue was never emptied on disconnect, something which
would lead to leaked urbs and transfer buffers if the device is
disconnected before being runtime resumed due to a write.

Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while
online")

Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/serial/sierra.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -759,6 +759,7 @@ static void sierra_close(struct usb_seri
 	struct usb_serial *serial = port->serial;
 	struct sierra_port_private *portdata;
 	struct sierra_intf_private *intfdata = port->serial->private;
+	struct urb *urb;
 
 	portdata = usb_get_serial_port_data(port);
 
@@ -780,6 +781,18 @@ static void sierra_close(struct usb_seri
 	portdata->opened = 0;
 	spin_unlock_irq(&intfdata->susp_lock);
 
+	for (;;) {
+		urb = usb_get_from_anchor(&portdata->delayed);
+		if (!urb)
+			break;
+		kfree(urb->transfer_buffer);
+		usb_free_urb(urb);
+		usb_autopm_put_interface_async(serial->interface);
+		spin_lock(&portdata->lock);
+		portdata->outstanding_urbs--;
+		spin_unlock(&portdata->lock);
+	}
+
 	sierra_stop_rx_urbs(port);
 	for (i = 0; i < portdata->num_in_urbs; i++) {
 		sierra_release_urb(portdata->in_urbs[i]);


Patches currently in stable-queue which might be from jhovold@xxxxxxxxx are

queue-3.15/usb-sierra-fix-urb-and-memory-leak-in-resume-error-path.patch
queue-3.15/usb-sierra-fix-aa-deadlock-in-open-error-path.patch
queue-3.15/usb-usb_wwan-fix-urb-leak-at-shutdown.patch
queue-3.15/usb-option-fix-runtime-pm-handling.patch
queue-3.15/usb-sierra-fix-remote-wakeup.patch
queue-3.15/usb-sierra-fix-urb-and-memory-leak-on-disconnect.patch
queue-3.15/usb-sierra-fix-use-after-free-at-suspend-resume.patch
queue-3.15/usb-usb_wwan-fix-write-and-suspend-race.patch
queue-3.15/usb-usb_wwan-fix-potential-null-deref-at-resume.patch
queue-3.15/usb-usb_wwan-fix-race-between-write-and-resume.patch
queue-3.15/usb-usb_wwan-fix-potential-blocked-i-o-after-resume.patch
queue-3.15/usb-usb_wwan-fix-urb-leak-in-write-error-path.patch
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