ipip: validate header length in ipip_tunnel_xmit

We need the same checks introduced by commit cb9f1b7 ("ip: validate header length on virtual device xmit") for ipip tunnel. Fixes: cb9f1b7 ("ip: validate header length on virtual device xmit") Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by: David S. Miller <davem@davemloft.net>
mariux64 · Jul 26, 2019 · 47d858d · 47d858d
1 parent 53db1cc
commit 47d858d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
@@ -275,6 +275,9 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb,
 	const struct iphdr  *tiph = &tunnel->parms.iph;
 	u8 ipproto;
 
+	if (!pskb_inet_may_pull(skb))
+		goto tx_error;
+
 	switch (skb->protocol) {
 	case htons(ETH_P_IP):
 		ipproto = IPPROTO_IPIP;