5 files changed, 56 insertions, 11 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 0ea10f849be8..1f466e82ac33 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1488,6 +1488,7 @@ static inline void net_timestamp_check(struct sk_buff *skb)
 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
 {
         skb_orphan(skb);
+        nf_reset(skb);
 
         if (!(dev->flags & IFF_UP) ||
             (skb->len > (dev->mtu + dev->hard_header_len))) {
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 34432b4e96bb..ce88293a34e2 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -843,7 +843,9 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
         skb->network_header   += off;
         if (skb_mac_header_was_set(skb))
                 skb->mac_header += off;
-        skb->csum_start       += nhead;
+        /* Only adjust this if it actually is csum_start rather than csum */
+        if (skb->ip_summed == CHECKSUM_PARTIAL)
+                skb->csum_start += nhead;
         skb->cloned   = 0;
         skb->hdr_len  = 0;
         skb->nohdr    = 0;
@@ -930,7 +932,8 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
         copy_skb_header(n, skb);
 
         off                  = newheadroom - oldheadroom;
-        n->csum_start       += off;
+        if (n->ip_summed == CHECKSUM_PARTIAL)
+                n->csum_start += off;
 #ifdef NET_SKBUFF_DATA_USES_OFFSET
         n->transport_header += off;
         n->network_header   += off;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e1a698df5706..784f34d11fdd 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1760,7 +1760,10 @@ static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
 
         idev = ipv6_find_idev(dev);
         if (!idev)
-                return NULL;
+                return ERR_PTR(-ENOBUFS);
+
+        if (idev->cnf.disable_ipv6)
+                return ERR_PTR(-EACCES);
 
         /* Add default multicast route */
         addrconf_add_mroute(dev);
@@ -2129,8 +2132,9 @@ static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
         if (!dev)
                 return -ENODEV;
 
-        if ((idev = addrconf_add_dev(dev)) == NULL)
-                return -ENOBUFS;
+        idev = addrconf_add_dev(dev);
+        if (IS_ERR(idev))
+                return PTR_ERR(idev);
 
         scope = ipv6_addr_scope(pfx);
 
@@ -2377,7 +2381,7 @@ static void addrconf_dev_config(struct net_device *dev)
         }
 
         idev = addrconf_add_dev(dev);
-        if (idev == NULL)
+        if (IS_ERR(idev))
                 return;
 
         memset(&addr, 0, sizeof(struct in6_addr));
@@ -2468,7 +2472,7 @@ static void addrconf_ip6_tnl_config(struct net_device *dev)
         ASSERT_RTNL();
 
         idev = addrconf_add_dev(dev);
-        if (!idev) {
+        if (IS_ERR(idev)) {
                 printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
                 return;
         }
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index c7000a6ca379..67ee34f57df7 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -632,7 +632,7 @@ static void ieee80211_send_layer2_update(struct sta_info *sta)
         skb->dev = sta->sdata->dev;
         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
         memset(skb->cb, 0, sizeof(skb->cb));
-        netif_rx(skb);
+        netif_rx_ni(skb);
 }
 
 static void sta_apply_parameters(struct ieee80211_local *local,
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index c0b6863e3b87..1980b71c283f 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -33,6 +33,7 @@
 static struct tcf_common *tcf_mirred_ht[MIRRED_TAB_MASK + 1];
 static u32 mirred_idx_gen;
 static DEFINE_RWLOCK(mirred_lock);
+static LIST_HEAD(mirred_list);
 
 static struct tcf_hashinfo mirred_hash_info = {
         .htab   =       tcf_mirred_ht,
@@ -47,7 +48,9 @@ static inline int tcf_mirred_release(struct tcf_mirred *m, int bind)
                         m->tcf_bindcnt--;
                 m->tcf_refcnt--;
                 if(!m->tcf_bindcnt && m->tcf_refcnt <= 0) {
-                        dev_put(m->tcfm_dev);
+                        list_del(&m->tcfm_list);
+                        if (m->tcfm_dev)
+                                dev_put(m->tcfm_dev);
                         tcf_hash_destroy(&m->common, &mirred_hash_info);
                         return 1;
                 }
@@ -134,8 +137,10 @@ static int tcf_mirred_init(struct nlattr *nla, struct nlattr *est,
                 m->tcfm_ok_push = ok_push;
         }
         spin_unlock_bh(&m->tcf_lock);
-        if (ret == ACT_P_CREATED)
+        if (ret == ACT_P_CREATED) {
+                list_add(&m->tcfm_list, &mirred_list);
                 tcf_hash_insert(pc, &mirred_hash_info);
+        }
 
         return ret;
 }
@@ -162,9 +167,14 @@ static int tcf_mirred(struct sk_buff *skb, struct tc_action *a,
         m->tcf_tm.lastuse = jiffies;
 
         dev = m->tcfm_dev;
+        if (!dev) {
+                printk_once(KERN_NOTICE "tc mirred: target device is gone\n");
+                goto out;
+        }
+
         if (!(dev->flags & IFF_UP)) {
                 if (net_ratelimit())
-                        pr_notice("tc mirred to Houston: device %s is gone!\n",
+                        pr_notice("tc mirred to Houston: device %s is down\n",
                                   dev->name);
                 goto out;
         }
@@ -232,6 +242,28 @@ nla_put_failure:
         return -1;
 }
 
+static int mirred_device_event(struct notifier_block *unused,
+                               unsigned long event, void *ptr)
+{
+        struct net_device *dev = ptr;
+        struct tcf_mirred *m;
+
+        if (event == NETDEV_UNREGISTER)
+                list_for_each_entry(m, &mirred_list, tcfm_list) {
+                        if (m->tcfm_dev == dev) {
+                                dev_put(dev);
+                                m->tcfm_dev = NULL;
+                        }
+                }
+
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block mirred_device_notifier = {
+        .notifier_call = mirred_device_event,
+};
+
+
 static struct tc_action_ops act_mirred_ops = {
         .kind           =       "mirred",
         .hinfo          =       &mirred_hash_info,
@@ -252,12 +284,17 @@ MODULE_LICENSE("GPL");
 
 static int __init mirred_init_module(void)
 {
+        int err = register_netdevice_notifier(&mirred_device_notifier);
+        if (err)
+                return err;
+
         pr_info("Mirror/redirect action on\n");
         return tcf_register_action(&act_mirred_ops);
 }
 
 static void __exit mirred_cleanup_module(void)
 {
+        unregister_netdevice_notifier(&mirred_device_notifier);
         tcf_unregister_action(&act_mirred_ops);
 }