Patch "USB: gadgetfs: Fix a potential memory leak in 'dev_config()'" has been added to the 3.18-stable tree

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

USB: gadgetfs: Fix a potential memory leak in 'dev_config()'

to the 3.18-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-gadgetfs-fix-a-potential-memory-leak-in-dev_config.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Christophe JAILLET <[email protected]>
Date: Tue, 21 Feb 2017 22:33:11 +0100
Subject: USB: gadgetfs: Fix a potential memory leak in 'dev_config()'

From: Christophe JAILLET <[email protected]>

[ Upstream commit b6e7aeeaf235901c42ec35de4633c7c69501d303 ]

'kbuf' is allocated just a few lines above using 'memdup_user()'. If the 'if (dev->buf)' test fails, this memory is never released.

---
 drivers/usb/gadget/legacy/inode.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -1921,8 +1921,10 @@ dev_config (struct file *fd, const char
 
 	spin_lock_irq (&dev->lock);
 	value = -EINVAL;
-	if (dev->buf)
+	if (dev->buf) {
+		kfree(kbuf);
 		goto fail;
+	}
 	dev->buf = kbuf;
 
 	/* full or low speed config */

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/usb-gadgetfs-fix-a-potential-memory-leak-in-dev_config.patch