1 files changed, 7 insertions, 0 deletions

diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 761d5b31b18d..ebc2bae6c289 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -37,6 +37,7 @@
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/device.h>
+#include <linux/pid_namespace.h>
 #include <asm/io.h>
 #include <asm/poll.h>
 #include <asm/uaccess.h>
@@ -266,6 +267,12 @@ static int coda_psdev_open(struct inode * inode, struct file * file)
         struct venus_comm *vcp;
         int idx, err;
 
+        if (task_active_pid_ns(current) != &init_pid_ns)
+                return -EINVAL;
+
+        if (current_user_ns() != &init_user_ns)
+                return -EINVAL;
+
         idx = iminor(inode);
         if (idx < 0 || idx >= MAX_CODADEVS)
                 return -ENODEV;