6 files changed, 92 insertions, 6 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index bcb05cb799c..c7e305d13b7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1308,6 +1308,13 @@ void dev_disable_lro(struct net_device *dev)
 {
         u32 flags;
 
+        /*
+         * If we're trying to disable lro on a vlan device
+         * use the underlying physical device instead
+         */
+        if (is_vlan_dev(dev))
+                dev = vlan_dev_real_dev(dev);
+
         if (dev->ethtool_ops && dev->ethtool_ops->get_flags)
                 flags = dev->ethtool_ops->get_flags(dev);
         else
@@ -5954,7 +5961,10 @@ EXPORT_SYMBOL(free_netdev);
 void synchronize_net(void)
 {
         might_sleep();
-        synchronize_rcu();
+        if (rtnl_is_locked())
+                synchronize_rcu_expedited();
+        else
+                synchronize_rcu();
 }
 EXPORT_SYMBOL(synchronize_net);
 
diff --git a/net/core/dst.c b/net/core/dst.c
index 81a4fa1c95e..9ccca038444 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -315,7 +315,7 @@ void __dst_destroy_metrics_generic(struct dst_entry *dst, unsigned long old)
 {
         unsigned long prev, new;
 
-        new = (unsigned long) dst_default_metrics;
+        new = ((unsigned long) dst_default_metrics) | DST_METRICS_READ_ONLY;
         prev = cmpxchg(&dst->_metrics, old, new);
         if (prev == old)
                 kfree(__DST_METRICS_PTR(old));
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 3911586e12e..008dc70b064 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -602,6 +602,7 @@ static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb,
 skip:
                 idx++;
         }
+        rcu_read_unlock();
         cb->args[1] = idx;
         rules_ops_put(ops);
 
diff --git a/net/core/filter.c b/net/core/filter.c
index 0eb8c4466ea..0e3622f1dcb 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -350,7 +350,9 @@ load_b:
                         continue;
                 }
                 default:
-                        WARN_ON(1);
+                        WARN_RATELIMIT(1, "Unknown code:%u jt:%u tf:%u k:%u\n",
+                                       fentry->code, fentry->jt,
+                                       fentry->jf, fentry->k);
                         return 0;
                 }
         }
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 2e2dce6583e..6c6b86d0da1 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -8,6 +8,8 @@
 #include <linux/idr.h>
 #include <linux/rculist.h>
 #include <linux/nsproxy.h>
+#include <linux/proc_fs.h>
+#include <linux/file.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 
@@ -302,6 +304,28 @@ void __put_net(struct net *net)
 }
 EXPORT_SYMBOL_GPL(__put_net);
 
+struct net *get_net_ns_by_fd(int fd)
+{
+        struct proc_inode *ei;
+        struct file *file;
+        struct net *net;
+
+        net = ERR_PTR(-EINVAL);
+        file = proc_ns_fget(fd);
+        if (!file)
+                goto out;
+
+        ei = PROC_I(file->f_dentry->d_inode);
+        if (ei->ns_ops != &netns_operations)
+                goto out;
+
+        net = get_net(ei->ns);
+out:
+        if (file)
+                fput(file);
+        return net;
+}
+
 #else
 struct net *copy_net_ns(unsigned long flags, struct net *old_net)
 {
@@ -309,6 +333,11 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net)
                 return ERR_PTR(-EINVAL);
         return old_net;
 }
+
+struct net *get_net_ns_by_fd(int fd)
+{
+        return ERR_PTR(-EINVAL);
+}
 #endif
 
 struct net *get_net_ns_by_pid(pid_t pid)
@@ -561,3 +590,39 @@ void unregister_pernet_device(struct pernet_operations *ops)
         mutex_unlock(&net_mutex);
 }
 EXPORT_SYMBOL_GPL(unregister_pernet_device);
+
+#ifdef CONFIG_NET_NS
+static void *netns_get(struct task_struct *task)
+{
+        struct net *net = NULL;
+        struct nsproxy *nsproxy;
+
+        rcu_read_lock();
+        nsproxy = task_nsproxy(task);
+        if (nsproxy)
+                net = get_net(nsproxy->net_ns);
+        rcu_read_unlock();
+
+        return net;
+}
+
+static void netns_put(void *ns)
+{
+        put_net(ns);
+}
+
+static int netns_install(struct nsproxy *nsproxy, void *ns)
+{
+        put_net(nsproxy->net_ns);
+        nsproxy->net_ns = get_net(ns);
+        return 0;
+}
+
+const struct proc_ns_operations netns_operations = {
+        .name           = "net",
+        .type           = CLONE_NEWNET,
+        .get            = netns_get,
+        .put            = netns_put,
+        .install        = netns_install,
+};
+#endif
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index d1644e317e7..abd936d8a71 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -850,6 +850,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
         struct nlattr *attr, *af_spec;
         struct rtnl_af_ops *af_ops;
 
+        ASSERT_RTNL();
         nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
         if (nlh == NULL)
                 return -EMSGSIZE;
@@ -1045,6 +1046,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
         [IFLA_LINKMODE]         = { .type = NLA_U8 },
         [IFLA_LINKINFO]         = { .type = NLA_NESTED },
         [IFLA_NET_NS_PID]       = { .type = NLA_U32 },
+        [IFLA_NET_NS_FD]        = { .type = NLA_U32 },
         [IFLA_IFALIAS]          = { .type = NLA_STRING, .len = IFALIASZ-1 },
         [IFLA_VFINFO_LIST]      = {. type = NLA_NESTED },
         [IFLA_VF_PORTS]         = { .type = NLA_NESTED },
@@ -1093,6 +1095,8 @@ struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
          */
         if (tb[IFLA_NET_NS_PID])
                 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
+        else if (tb[IFLA_NET_NS_FD])
+                net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
         else
                 net = get_net(src_net);
         return net;
@@ -1223,7 +1227,7 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
         int send_addr_notify = 0;
         int err;
 
-        if (tb[IFLA_NET_NS_PID]) {
+        if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
                 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
                 if (IS_ERR(net)) {
                         err = PTR_ERR(net);
@@ -1876,6 +1880,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
         int min_len;
         int family;
         int type;
+        int err;
 
         type = nlh->nlmsg_type;
         if (type > RTM_MAX)
@@ -1902,8 +1907,11 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                 if (dumpit == NULL)
                         return -EOPNOTSUPP;
 
+                __rtnl_unlock();
                 rtnl = net->rtnl;
-                return netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
+                err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
+                rtnl_lock();
+                return err;
         }
 
         memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
@@ -1975,7 +1983,7 @@ static int __net_init rtnetlink_net_init(struct net *net)
 {
         struct sock *sk;
         sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
-                                   rtnetlink_rcv, NULL, THIS_MODULE);
+                                   rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
         if (!sk)
                 return -ENOMEM;
         net->rtnl = sk;