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Commit 835acf5d authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
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l2tp: fix a potential skb leak in l2tp_xmit_skb() 



l2tp_xmit_skb() can leak one skb if skb_cow_head() returns an error.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1ce5cce8

net/l2tp/l2tp_core.c

+3 −1
Original line number Diff line number Diff line
@@ -1045,8 +1045,10 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len 
	headroom = NET_SKB_PAD + sizeof(struct iphdr) +

		uhlen + hdr_len;

	old_headroom = skb_headroom(skb);

	if (skb_cow_head(skb, headroom))

	if (skb_cow_head(skb, headroom)) {

		dev_kfree_skb(skb);

		goto abort;

	}



	new_headroom = skb_headroom(skb);

	skb_orphan(skb);