[3.16.y-ckt stable] Patch "usb: gadget: gadgetfs: Free memory allocated by memdup_user()" has been added to staging queue

[Luis Henriques]

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

    usb: gadget: gadgetfs: Free memory allocated by memdup_user()

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt5.

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

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 842c7ef555beec455570c09735ffc0a7e1505783 Mon Sep 17 00:00:00 2001
From: Mario Schuknecht <mario.schuknecht at dresearch-fe.de>
Date: Tue, 16 Dec 2014 08:58:57 +0100
Subject: usb: gadget: gadgetfs: Free memory allocated by memdup_user()

commit b44be2462dbe3e23f0aedff64de52a1e8e47a1cd upstream.

Commit 3b74c73f8d6f053f422e85fce955b61fb181cfe7 switched over to memdup_user()
in ep_write() function and removed kfree (kbuf).
memdup_user() function allocates memory which is never freed.

Fixes: 3b74c73 (usb: gadget: inode: switch over to memdup_user())
Signed-off-by: Mario Schuknecht <mario.schuknecht at dresearch-fe.de>
Signed-off-by: Felipe Balbi <balbi at ti.com>
[ luis: backported to 3.16:
  - file rename: drivers/usb/gadget/legacy/inode.c ->
    drivers/usb/gadget/inode.c ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/usb/gadget/inode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 2e4ce7704908..c44dc6ef2500 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -450,6 +450,7 @@ ep_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 		data->name, len, (int) value);
 free1:
 	mutex_unlock(&data->lock);
+	kfree (kbuf);
 	return value;
 }

--
2.1.4