Patch "cdc_ncm: Fix tx_bytes statistics" has been added to the 4.0-stable tree

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

cdc_ncm: Fix tx_bytes statistics

to the 4.0-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:
cdc_ncm-fix-tx_bytes-statistics.patch
and it can be found in the queue-4.0 subdirectory.

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

From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <[email protected]>
Date: Fri, 22 May 2015 13:15:22 +0200
Subject: cdc_ncm: Fix tx_bytes statistics
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From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <[email protected]>

[ Upstream commit 44f6731d8b68fa02f5ed65eaceac41f8c3c9279e ]

The tx_curr_frame_payload field is u32. When we try to calculate a small negative delta based on it, we end up with a positive integer close to 2^32 instead. So the tx_bytes pointer increases by about 2^32 for every transmitted frame.

Fix by calculating the delta as a signed long.

---
 drivers/net/usb/cdc_ncm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1182,7 +1182,7 @@ cdc_ncm_fill_tx_frame(struct usbnet *dev
 	 * payload data instead.
 	 */
 	usbnet_set_skb_tx_stats(skb_out, n,
-				ctx->tx_curr_frame_payload - skb_out->len);
+				(long)ctx->tx_curr_frame_payload - skb_out->len);
 
 	return skb_out;
 

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

queue-4.0/cdc_ncm-fix-tx_bytes-statistics.patch