---

yaml
---
r: 75614
b: refs/heads/master
c: 2dc2f20
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 398bcbebb6f721ac308df1e3d658c0029bb74503
+refs/heads/master: 2dc2f207fb251666d2396fe1a69272b307ecc333

trunk/net/bridge/br_netfilter.c

@@ -142,6 +142,23 @@ static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
 	return skb->nf_bridge;
 }
 
+static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+	if (atomic_read(&nf_bridge->use) > 1) {
+		struct nf_bridge_info *tmp = nf_bridge_alloc(skb);
+
+		if (tmp) {
+			memcpy(tmp, nf_bridge, sizeof(struct nf_bridge_info));
+			atomic_set(&tmp->use, 1);
+			nf_bridge_put(nf_bridge);
+		}
+		nf_bridge = tmp;
+	}
+	return nf_bridge;
+}
+
 static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
 {
 	unsigned int len = nf_bridge_encap_header_len(skb);
@@ -637,6 +654,11 @@ static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff *skb,
 	if (!skb->nf_bridge)
 		return NF_ACCEPT;
 
+	/* Need exclusive nf_bridge_info since we might have multiple
+	 * different physoutdevs. */
+	if (!nf_bridge_unshare(skb))
+		return NF_DROP;
+
 	parent = bridge_parent(out);
 	if (!parent)
 		return NF_DROP;
@@ -718,6 +740,11 @@ static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff *skb,
 	if (!skb->nf_bridge)
 		return NF_ACCEPT;
 
+	/* Need exclusive nf_bridge_info since we might have multiple
+	 * different physoutdevs. */
+	if (!nf_bridge_unshare(skb))
+		return NF_DROP;
+
 	nf_bridge = skb->nf_bridge;
 	if (!(nf_bridge->mask & BRNF_BRIDGED_DNAT))
 		return NF_ACCEPT;