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

sr9700: 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%3Ba=su...

The filename of the patch is: sr9700-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 stable@vger.kernel.org know about it.

From d532c1082f68176363ed766d09bf187616e282fe Mon Sep 17 00:00:00 2001

From: Eric Dumazet edumazet@google.com Date: Wed, 19 Apr 2017 09:59:23 -0700 Subject: sr9700: use skb_cow_head() to deal with cloned skbs

From: Eric Dumazet edumazet@google.com

commit d532c1082f68176363ed766d09bf187616e282fe 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.

Fixes: c9b37458e956 ("USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support") Signed-off-by: Eric Dumazet edumazet@google.com Cc: James Hughes james.hughes@raspberrypi.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Oliver Neukum oneukum@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/net/usb/sr9700.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)

--- a/drivers/net/usb/sr9700.c +++ b/drivers/net/usb/sr9700.c @@ -456,14 +456,9 @@ static struct sk_buff *sr9700_tx_fixup(s

len = skb->len;

- if (skb_headroom(skb) < SR_TX_OVERHEAD) { - struct sk_buff *skb2; - - skb2 = skb_copy_expand(skb, SR_TX_OVERHEAD, 0, flags); + if (skb_cow_head(skb, SR_TX_OVERHEAD)) { dev_kfree_skb_any(skb); - skb = skb2; - if (!skb) - return NULL; + return NULL; }

__skb_push(skb, SR_TX_OVERHEAD);

Patches currently in stable-queue which might be from edumazet@google.com 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