From: Xin Long <lucien.xin@gmail.com>
Date: Sat, 28 Jan 2023 15:58:36 +0000 (-0500)
Subject: ipvlan: use skb_ip_totlen in ipvlan_get_L3_hdr
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=50e6fb5c6efb2b33b15ea490dfe355cb312f6eb5;p=linux.git

ipvlan: use skb_ip_totlen in ipvlan_get_L3_hdr

ipvlan devices calls netif_inherit_tso_max() to get the tso_max_size/segs
from the lower device, so when lower device supports BIG TCP, the ipvlan
devices support it too. We also should consider its iph tot_len accessing.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index bb1c298c1e78b..460b3d4f2245f 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -157,7 +157,7 @@ void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type)
 			return NULL;
 
 		ip4h = ip_hdr(skb);
-		pktlen = ntohs(ip4h->tot_len);
+		pktlen = skb_ip_totlen(skb);
 		if (ip4h->ihl < 5 || ip4h->version != 4)
 			return NULL;
 		if (skb->len < pktlen || pktlen < (ip4h->ihl * 4))