commit 0b67c43ce36a9964f1d5e3f973ee19eefd3f9f8f
author Florian Westphal <fw@strlen.de> Wed Apr 01 22:36:27 2015 +0200
committer Pablo Neira Ayuso <pablo@netfilter.org> Thu Apr 02 10:41:14 2015 +0200
tree 1a1e1c9c5c37f8d8576fa6792b6525189e977e30
parent c5035c77f89364d2da2871d829553bd1a4321940

netfilter: bridge: really save frag_max_size between PRE and POST_ROUTING

We also need to save/store in forward, else br_parse_ip_options call
will zero frag_max_size as well.

Fixes: 93fdd47e5 ('bridge: Save frag_max_size between PRE_ROUTING and POST_ROUTING')
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/bridge/br_netfilter.c

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index f3884a1..282ed76 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -686,6 +686,13 @@
 	struct net_device *in;
 
 	if (!IS_ARP(skb) && !IS_VLAN_ARP(skb)) {
+		int frag_max_size;
+
+		if (skb->protocol == htons(ETH_P_IP)) {
+			frag_max_size = IPCB(skb)->frag_max_size;
+			BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
+		}
+
 		in = nf_bridge->physindev;
 		if (nf_bridge->mask & BRNF_PKT_TYPE) {
 			skb->pkt_type = PACKET_OTHERHOST;
@@ -745,8 +752,14 @@
 		nf_bridge->mask |= BRNF_PKT_TYPE;
 	}
 
-	if (pf == NFPROTO_IPV4 && br_parse_ip_options(skb))
-		return NF_DROP;
+	if (pf == NFPROTO_IPV4) {
+		int frag_max = BR_INPUT_SKB_CB(skb)->frag_max_size;
+
+		if (br_parse_ip_options(skb))
+			return NF_DROP;
+
+		IPCB(skb)->frag_max_size = frag_max;
+	}
 
 	nf_bridge->physoutdev = skb->dev;
 	if (pf == NFPROTO_IPV4)