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l2tp: fix l2tp_udp_recv_core()

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pskb_may_pull() can change skb->data, so we have to load ptr/optr at the
right place.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-11-08 13:59:44 -05:00 committed by David S. Miller
parent ea1649dea9
commit e50e705ca7
1 changed files with 4 additions and 4 deletions
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8
net/l2tp/l2tp_core.c
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@ -756,9 +756,6 @@ static int l2tp_udp_recv_core(struct l2tp_tunnel *tunnel, struct sk_buff *skb,
goto error;
}
/* Point to L2TP header */
optr = ptr = skb->data;
/* Trace packet contents, if enabled */
if (tunnel->debug & L2TP_MSG_DATA) {
length = min(32u, skb->len);
@ -769,12 +766,15 @@ static int l2tp_udp_recv_core(struct l2tp_tunnel *tunnel, struct sk_buff *skb,
offset = 0;
do {
printk(" %02X", ptr[offset]);
printk(" %02X", skb->data[offset]);
} while (++offset < length);
printk("\n");
}
/* Point to L2TP header */
optr = ptr = skb->data;
/* Get L2TP header flags */
hdrflags = ntohs(*(__be16 *) ptr);