Patch "USB: serial: io_edgeport: fix memory leaks in probe error path" has been added to the 4.4-stable tree

Patch "USB: serial: io_edgeport: fix memory leaks in probe error path" has been added to the 4.4-stable tree

[gregkh]

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

    USB: serial: io_edgeport: fix memory leaks in probe error path

to the 4.4-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-serial-io_edgeport-fix-memory-leaks-in-probe-error-path.patch
and it can be found in the queue-4.4 subdirectory.

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


>From c8d62957d450cc1a22ce3242908709fe367ddc8e Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Sun, 8 May 2016 20:07:57 +0200
Subject: USB: serial: io_edgeport: fix memory leaks in probe error path

From: Johan Hovold <johan@kernel.org>

commit c8d62957d450cc1a22ce3242908709fe367ddc8e upstream.

URBs and buffers allocated in attach for Epic devices would never be
deallocated in case of a later probe error (e.g. failure to allocate
minor numbers) as disconnect is then never called.

Fix by moving deallocation to release and making sure that the
URBs are first unlinked.

Fixes: f9c99bb8b3a1 ("USB: usb-serial: replace shutdown with disconnect,
release")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/serial/io_edgeport.c |   17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -2966,16 +2966,9 @@ static void edge_disconnect(struct usb_s
 {
 	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
 
-	/* stop reads and writes on all ports */
-	/* free up our endpoint stuff */
 	if (edge_serial->is_epic) {
 		usb_kill_urb(edge_serial->interrupt_read_urb);
-		usb_free_urb(edge_serial->interrupt_read_urb);
-		kfree(edge_serial->interrupt_in_buffer);
-
 		usb_kill_urb(edge_serial->read_urb);
-		usb_free_urb(edge_serial->read_urb);
-		kfree(edge_serial->bulk_in_buffer);
 	}
 }
 
@@ -2988,6 +2981,16 @@ static void edge_release(struct usb_seri
 {
 	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
 
+	if (edge_serial->is_epic) {
+		usb_kill_urb(edge_serial->interrupt_read_urb);
+		usb_free_urb(edge_serial->interrupt_read_urb);
+		kfree(edge_serial->interrupt_in_buffer);
+
+		usb_kill_urb(edge_serial->read_urb);
+		usb_free_urb(edge_serial->read_urb);
+		kfree(edge_serial->bulk_in_buffer);
+	}
+
 	kfree(edge_serial);
 }
 


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.4/usb-serial-quatech2-fix-use-after-free-in-probe-error-path.patch
queue-4.4/usb-serial-option-add-support-for-cinterion-ph8-and-ahxx.patch
queue-4.4/usb-serial-io_edgeport-fix-memory-leaks-in-attach-error-path.patch
queue-4.4/usb-serial-mxuport-fix-use-after-free-in-probe-error-path.patch
queue-4.4/usb-serial-option-add-even-more-zte-device-ids.patch
queue-4.4/usb-serial-keyspan-fix-use-after-free-in-probe-error-path.patch
queue-4.4/usb-serial-option-add-more-zte-device-ids.patch
queue-4.4/usb-serial-io_edgeport-fix-memory-leaks-in-probe-error-path.patch