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 my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>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
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")
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.32
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(+)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index dd9820d3fa03..1a42649253a5 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -759,6 +759,7 @@ static void sierra_close(struct usb_serial_port *port)
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_serial_port *port)
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]);
--
1.9.0
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