Merge commit 'v3.9-rc5' into next/clk-exynos

Conflicts:
	arch/arm/boot/dts/exynos4.dtsi
	arch/arm/boot/dts/exynos5440.dtsi

3 files changed, 13 insertions, 9 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index a86aebc9ba7c..869116c2afbe 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -446,9 +446,10 @@ static const struct file_operations proc_reg_file_ops_no_compat = {
 
 struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 {
-        struct inode *inode = iget_locked(sb, de->low_ino);
+        struct inode *inode = new_inode_pseudo(sb);
 
-        if (inode && (inode->i_state & I_NEW)) {
+        if (inode) {
+                inode->i_ino = de->low_ino;
                 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
                 PROC_I(inode)->pde = de;
 
@@ -476,7 +477,6 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
                                 inode->i_fop = de->proc_fops;
                         }
                 }
-                unlock_new_inode(inode);
         } else
                pde_put(de);
         return inode;
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index b7a47196c8c3..66b51c0383da 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -118,7 +118,7 @@ static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
         struct super_block *sb = inode->i_sb;
         struct proc_inode *ei = PROC_I(inode);
         struct task_struct *task;
-        struct dentry *ns_dentry;
+        struct path ns_path;
         void *error = ERR_PTR(-EACCES);
 
         task = get_proc_task(inode);
@@ -128,14 +128,14 @@ static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
         if (!ptrace_may_access(task, PTRACE_MODE_READ))
                 goto out_put_task;
 
-        ns_dentry = proc_ns_get_dentry(sb, task, ei->ns_ops);
-        if (IS_ERR(ns_dentry)) {
-                error = ERR_CAST(ns_dentry);
+        ns_path.dentry = proc_ns_get_dentry(sb, task, ei->ns_ops);
+        if (IS_ERR(ns_path.dentry)) {
+                error = ERR_CAST(ns_path.dentry);
                 goto out_put_task;
         }
 
-        dput(nd->path.dentry);
-        nd->path.dentry = ns_dentry;
+        ns_path.mnt = mntget(nd->path.mnt);
+        nd_jump_link(nd, &ns_path);
         error = NULL;
 
 out_put_task:
diff --git a/fs/proc/root.c b/fs/proc/root.c
index c6e9fac26bac..9c7fab1d23f0 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -16,6 +16,7 @@
 #include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/bitops.h>
+#include <linux/user_namespace.h>
 #include <linux/mount.h>
 #include <linux/pid_namespace.h>
 #include <linux/parser.h>
@@ -108,6 +109,9 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
         } else {
                 ns = task_active_pid_ns(current);
                 options = data;
+
+                if (!current_user_ns()->may_mount_proc)
+                        return ERR_PTR(-EPERM);
         }
 
         sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns);