Don't access skb->nf_bridge directly, this pointer will be removed soon.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
net/bridge/br_netfilter.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 947a2f6..40009b1 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -124,6 +124,11 @@ struct brnf_frag_data {
static DEFINE_PER_CPU(struct brnf_frag_data, brnf_frag_data_storage);
#endif
+static struct nf_bridge_info *nf_bridge_info_get(const struct sk_buff *skb)
+{
+ return skb->nf_bridge;
+}
+
static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
{
struct net_bridge_port *port;
@@ -274,7 +279,7 @@ static void nf_bridge_update_protocol(struct sk_buff *skb)
* bridge PRE_ROUTING hook. */
static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
if (nf_bridge->pkt_otherhost) {
@@ -306,7 +311,6 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
*/
static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
struct neighbour *neigh;
struct dst_entry *dst;
@@ -316,6 +320,7 @@ static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
dst = skb_dst(skb);
neigh = dst_neigh_lookup_skb(dst, skb);
if (neigh) {
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
int ret;
if (neigh->hh.hh_len) {
@@ -402,7 +407,7 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct iphdr *iph = ip_hdr(skb);
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
int err;
int frag_max_size;
@@ -494,7 +499,7 @@ static struct net_device *brnf_get_logical_dev(struct sk_buff *skb, const struct
/* Some common code for IPv4/IPv6 */
static struct net_device *setup_pre_routing(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
@@ -694,7 +699,7 @@ static unsigned int br_nf_local_in(const struct nf_hook_ops *ops,
/* PF_BRIDGE/FORWARD *************************************************/
static int br_nf_forward_finish(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct net_device *in;
if (!IS_ARP(skb) && !IS_VLAN_ARP(skb)) {
@@ -745,6 +750,10 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
if (!nf_bridge_unshare(skb))
return NF_DROP;
+ nf_bridge = nf_bridge_info_get(skb);
+ if (!nf_bridge)
+ return NF_DROP;
+
parent = bridge_parent(out);
if (!parent)
return NF_DROP;
@@ -758,7 +767,6 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
nf_bridge_pull_encap_header(skb);
- nf_bridge = skb->nf_bridge;
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
nf_bridge->pkt_otherhost = true;
@@ -917,7 +925,7 @@ static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct net_device *realoutdev = bridge_parent(skb->dev);
u_int8_t pf;
@@ -986,7 +994,7 @@ static unsigned int ip_sabotage_in(const struct nf_hook_ops *ops,
*/
static void br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
{
- struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
skb_pull(skb, ETH_HLEN);
nf_bridge->mask &= ~BRNF_BRIDGED_DNAT;
--
2.0.5
--
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