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-rw-r--r--drivers/net/pppol2tp.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c
index 79359919335b..8db342f2fdc9 100644
--- a/drivers/net/pppol2tp.c
+++ b/drivers/net/pppol2tp.c
@@ -980,6 +980,8 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
__wsum csum = 0;
struct udphdr *uh;
unsigned int len;
+ int old_headroom;
+ int new_headroom;
if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED))
goto abort;
@@ -1001,16 +1003,18 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
/* Check that there's enough headroom in the skb to insert IP,
* UDP and L2TP and PPP headers. If not enough, expand it to
- * make room. Note that a new skb (or a clone) is
- * allocated. If we return an error from this point on, make
- * sure we free the new skb but do not free the original skb
- * since that is done by the caller for the error case.
+ * make room. Adjust truesize.
*/
headroom = NET_SKB_PAD + sizeof(struct iphdr) +
sizeof(struct udphdr) + hdr_len + sizeof(ppph);
+ old_headroom = skb_headroom(skb);
if (skb_cow_head(skb, headroom))
goto abort;
+ new_headroom = skb_headroom(skb);
+ skb_orphan(skb);
+ skb->truesize += new_headroom - old_headroom;
+
/* Setup PPP header */
__skb_push(skb, sizeof(ppph));
skb->data[0] = ppph[0];
@@ -1065,7 +1069,6 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
/* Get routing info from the tunnel socket */
dst_release(skb->dst);
skb->dst = dst_clone(__sk_dst_get(sk_tun));
- skb_orphan(skb);
skb->sk = sk_tun;
/* Queue the packet to IP for output */