1 files changed, 31 insertions, 1 deletions

diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index a3612f82f187..e10385c17f73 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -13,6 +13,7 @@
 #include <linux/version.h>
 #include <linux/nsproxy.h>
 #include <linux/init_task.h>
+#include <linux/namespace.h>
 
 struct nsproxy init_nsproxy = INIT_NSPROXY(init_nsproxy);
 
@@ -55,6 +56,11 @@ struct nsproxy *dup_namespaces(struct nsproxy *orig)
 {
         struct nsproxy *ns = clone_namespaces(orig);
 
+        if (ns) {
+                if (ns->namespace)
+                        get_namespace(ns->namespace);
+        }
+
         return ns;
 }
 
@@ -65,16 +71,40 @@ struct nsproxy *dup_namespaces(struct nsproxy *orig)
 int copy_namespaces(int flags, struct task_struct *tsk)
 {
         struct nsproxy *old_ns = tsk->nsproxy;
+        struct nsproxy *new_ns;
+        int err = 0;
 
         if (!old_ns)
                 return 0;
 
         get_nsproxy(old_ns);
 
-        return 0;
+        if (!(flags & CLONE_NEWNS))
+                return 0;
+
+        new_ns = clone_namespaces(old_ns);
+        if (!new_ns) {
+                err = -ENOMEM;
+                goto out;
+        }
+
+        tsk->nsproxy = new_ns;
+
+        err = copy_namespace(flags, tsk);
+        if (err) {
+                tsk->nsproxy = old_ns;
+                put_nsproxy(new_ns);
+                goto out;
+        }
+
+out:
+        put_nsproxy(old_ns);
+        return err;
 }
 
 void free_nsproxy(struct nsproxy *ns)
 {
+                if (ns->namespace)
+                        put_namespace(ns->namespace);
                 kfree(ns);
 }