Merge v3.9-rc5 into driver-core-next

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / sysfs / mount.c

diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 8d924b5ec733450e37599c8338ab69ea3b15027f..afd83273e6cea8112e1570c8835bfa829303b2f8 100644 (file)
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/magic.h>
 #include <linux/slab.h>
+#include <linux/user_namespace.h>
 
 #include "sysfs.h"
 
@@ -111,6 +112,9 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
        struct super_block *sb;
        int error;
 
+       if (!(flags & MS_KERNMOUNT) && !current_user_ns()->may_mount_sysfs)
+               return ERR_PTR(-EPERM);
+
        info = kzalloc(sizeof(*info), GFP_KERNEL);
        if (!info)
                return ERR_PTR(-ENOMEM);