Patch "USB: usbfs: fix potential infoleak in devio" has been added to the 4.4-stable tree

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

USB: usbfs: fix potential infoleak in devio

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-usbfs-fix-potential-infoleak-in-devio.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 <[email protected]> know about it.

From: Kangjie Lu <[email protected]>
Date: Tue, 3 May 2016 16:32:16 -0400
Subject: USB: usbfs: fix potential infoleak in devio
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From: Kangjie Lu <[email protected]>

commit 681fef8380eb818c0b845fca5d2ab1dcbab114ee upstream.

The stack object “ci” has a total size of 8 bytes. Its last 3 bytes are padding bytes which are not initialized and leaked to userland via “copy_to_user”.

---
 drivers/usb/core/devio.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

@@ -1203,10 +1203,11 @@ static int proc_getdriver(struct usb_dev
 
 static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg)
 {
-	struct usbdevfs_connectinfo ci = {
-		.devnum = ps->dev->devnum,
-		.slow = ps->dev->speed == USB_SPEED_LOW
-	};
+	struct usbdevfs_connectinfo ci;
+
+	memset(&ci, 0, sizeof(ci));
+	ci.devnum = ps->dev->devnum;
+	ci.slow = ps->dev->speed == USB_SPEED_LOW;
 
 	if (copy_to_user(arg, &ci, sizeof(ci)))
 		return -EFAULT;

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

queue-4.4/usb-usbfs-fix-potential-infoleak-in-devio.patch