4 files changed, 62 insertions, 6 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 1c15b189c52b..b65a5051361f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3602,7 +3602,7 @@ another_round:
 
 	if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
 	    skb->protocol == cpu_to_be16(ETH_P_8021AD)) {
-		skb = vlan_untag(skb);
+		skb = skb_vlan_untag(skb);
 		if (unlikely(!skb))
 			goto unlock;
 	}
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 85b62691f4f2..7c6b51a58968 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -373,9 +373,11 @@ struct net *get_net_ns_by_pid(pid_t pid)
 	tsk = find_task_by_vpid(pid);
 	if (tsk) {
 		struct nsproxy *nsproxy;
-		nsproxy = task_nsproxy(tsk);
+		task_lock(tsk);
+		nsproxy = tsk->nsproxy;
 		if (nsproxy)
 			net = get_net(nsproxy->net_ns);
+		task_unlock(tsk);
 	}
 	rcu_read_unlock();
 	return net;
@@ -632,11 +634,11 @@ static void *netns_get(struct task_struct *task)
 	struct net *net = NULL;
 	struct nsproxy *nsproxy;
 
-	rcu_read_lock();
-	nsproxy = task_nsproxy(task);
+	task_lock(task);
+	nsproxy = task->nsproxy;
 	if (nsproxy)
 		net = get_net(nsproxy->net_ns);
-	rcu_read_unlock();
+	task_unlock(task);
 
 	return net;
 }
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 8d39071f32d7..f0493e3b7471 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -804,7 +804,8 @@ static inline int rtnl_vfinfo_size(const struct net_device *dev,
 			(nla_total_size(sizeof(struct ifla_vf_mac)) +
 			 nla_total_size(sizeof(struct ifla_vf_vlan)) +
 			 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
-			 nla_total_size(sizeof(struct ifla_vf_rate)));
+			 nla_total_size(sizeof(struct ifla_vf_rate)) +
+			 nla_total_size(sizeof(struct ifla_vf_link_state)));
 		return size;
 	} else
 		return 0;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 224506a6fa80..163b673f9e62 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -62,6 +62,7 @@
 #include <linux/scatterlist.h>
 #include <linux/errqueue.h>
 #include <linux/prefetch.h>
+#include <linux/if_vlan.h>
 
 #include <net/protocol.h>
 #include <net/dst.h>
@@ -3973,3 +3974,55 @@ unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)
 	return shinfo->gso_size;
 }
 EXPORT_SYMBOL_GPL(skb_gso_transport_seglen);
+
+static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb)
+{
+	if (skb_cow(skb, skb_headroom(skb)) < 0) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN);
+	skb->mac_header += VLAN_HLEN;
+	return skb;
+}
+
+struct sk_buff *skb_vlan_untag(struct sk_buff *skb)
+{
+	struct vlan_hdr *vhdr;
+	u16 vlan_tci;
+
+	if (unlikely(vlan_tx_tag_present(skb))) {
+		/* vlan_tci is already set-up so leave this for another time */
+		return skb;
+	}
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (unlikely(!skb))
+		goto err_free;
+
+	if (unlikely(!pskb_may_pull(skb, VLAN_HLEN)))
+		goto err_free;
+
+	vhdr = (struct vlan_hdr *)skb->data;
+	vlan_tci = ntohs(vhdr->h_vlan_TCI);
+	__vlan_hwaccel_put_tag(skb, skb->protocol, vlan_tci);
+
+	skb_pull_rcsum(skb, VLAN_HLEN);
+	vlan_set_encap_proto(skb, vhdr);
+
+	skb = skb_reorder_vlan_header(skb);
+	if (unlikely(!skb))
+		goto err_free;
+
+	skb_reset_network_header(skb);
+	skb_reset_transport_header(skb);
+	skb_reset_mac_len(skb);
+
+	return skb;
+
+err_free:
+	kfree_skb(skb);
+	return NULL;
+}
+EXPORT_SYMBOL(skb_vlan_untag);