From 346c183dbd66ac8ff0e27fe823b4cf02ad1e8dc5 Mon Sep 17 00:00:00 2001 From: Haishuang Yan Date: Thu, 25 Jul 2019 11:07:56 +0800 Subject: [PATCH] ipip: validate header length in ipip_tunnel_xmit We need the same checks introduced by commit 3b536330f91c ("ip: validate header length on virtual device xmit") for ipip tunnel. Fixes: 3b536330f91c6 ("ip: validate header length on virtual device xmit") Signed-off-by: Haishuang Yan Signed-off-by: David S. Miller --- net/ipv4/ipip.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 43adfc1641bac..2f01cf6fa0def 100644 --- 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; -- 2.39.5