Patch "cx82310_eth: use skb_cow_head() to deal with cloned skbs" has been added to the 4.9-stable tree

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

cx82310_eth: use skb_cow_head() to deal with cloned skbs

to the 4.9-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:

     cx82310_eth-use-skb_cow_head-to-deal-with-cloned-skbs.patch

and it can be found in the queue-4.9 subdirectory.

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

From: Eric Dumazet <[email protected]>
Date: Wed, 19 Apr 2017 09:59:22 -0700
Subject: cx82310_eth: use skb_cow_head() to deal with cloned skbs

From: Eric Dumazet <[email protected]>

commit a9e840a2081ed28c2b7caa6a9a0041c950b3c37d upstream.

We need to ensure there is enough headroom to push extra header, but we also need to check if we are allowed to change headers.

skb_cow_head() is the proper helper to deal with this.

---
 drivers/net/usb/cx82310_eth.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

@@ -293,12 +293,9 @@ static struct sk_buff *cx82310_tx_fixup(
 {
 	int len = skb->len;
 
-	if (skb_headroom(skb) < 2) {
-		struct sk_buff *skb2 = skb_copy_expand(skb, 2, 0, flags);
+	if (skb_cow_head(skb, 2)) {
 		dev_kfree_skb_any(skb);
-		skb = skb2;
-		if (!skb)
-			return NULL;
+		return NULL;
 	}
 	skb_push(skb, 2);
 

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

queue-4.9/lan78xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.9/cx82310_eth-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.9/sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch queue-4.9/smsc75xx-use-skb_cow_head-to-deal-with-cloned-skbs.patch