1 From a9e840a2081ed28c2b7caa6a9a0041c950b3c37d Mon Sep 17 00:00:00 2001
2 From: Eric Dumazet <edumazet@google.com>
3 Date: Wed, 19 Apr 2017 09:59:22 -0700
4 Subject: [PATCH] cx82310_eth: use skb_cow_head() to deal with cloned skbs
6 We need to ensure there is enough headroom to push extra header,
7 but we also need to check if we are allowed to change headers.
9 skb_cow_head() is the proper helper to deal with this.
11 Fixes: cc28a20e77b2 ("introduce cx82310_eth: Conexant CX82310-based ADSL router USB ethernet driver")
12 Signed-off-by: Eric Dumazet <edumazet@google.com>
13 Cc: James Hughes <james.hughes@raspberrypi.org>
14 Signed-off-by: David S. Miller <davem@davemloft.net>
16 drivers/net/usb/cx82310_eth.c | 7 ++-----
17 1 file changed, 2 insertions(+), 5 deletions(-)
19 --- a/drivers/net/usb/cx82310_eth.c
20 +++ b/drivers/net/usb/cx82310_eth.c
21 @@ -293,12 +293,9 @@ static struct sk_buff *cx82310_tx_fixup(
25 - if (skb_headroom(skb) < 2) {
26 - struct sk_buff *skb2 = skb_copy_expand(skb, 2, 0, flags);
27 + if (skb_cow_head(skb, 2)) {
28 dev_kfree_skb_any(skb);