41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From e9156cd26a495a18706e796f02a81fee41ec14f4 Mon Sep 17 00:00:00 2001
|
|
From: James Hughes <james.hughes@raspberrypi.org>
|
|
Date: Wed, 19 Apr 2017 11:13:40 +0100
|
|
Subject: [PATCH] smsc95xx: Use skb_cow_head to deal with cloned skbs
|
|
|
|
The driver was failing to check that the SKB wasn't cloned
|
|
before adding checksum data.
|
|
Replace existing handling to extend/copy the header buffer
|
|
with skb_cow_head.
|
|
|
|
Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
|
|
Acked-by: Eric Dumazet <edumazet@google.com>
|
|
Acked-by: Woojung Huh <Woojung.Huh@microchip.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
drivers/net/usb/smsc95xx.c | 12 ++++++------
|
|
1 file changed, 6 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/net/usb/smsc95xx.c
|
|
+++ b/drivers/net/usb/smsc95xx.c
|
|
@@ -2001,13 +2001,13 @@ static struct sk_buff *smsc95xx_tx_fixup
|
|
/* We do not advertise SG, so skbs should be already linearized */
|
|
BUG_ON(skb_shinfo(skb)->nr_frags);
|
|
|
|
- if (skb_headroom(skb) < overhead) {
|
|
- struct sk_buff *skb2 = skb_copy_expand(skb,
|
|
- overhead, 0, flags);
|
|
+ /* Make writable and expand header space by overhead if required */
|
|
+ if (skb_cow_head(skb, overhead)) {
|
|
+ /* Must deallocate here as returning NULL to indicate error
|
|
+ * means the skb won't be deallocated in the caller.
|
|
+ */
|
|
dev_kfree_skb_any(skb);
|
|
- skb = skb2;
|
|
- if (!skb)
|
|
- return NULL;
|
|
+ return NULL;
|
|
}
|
|
|
|
if (csum) {
|