1 files changed, 2 insertions, 0 deletions

diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
index 7e8efaade2ea..5efdfe9f5e76 100644
--- a/arch/s390/lib/uaccess_pt.c
+++ b/arch/s390/lib/uaccess_pt.c
@@ -406,6 +406,8 @@ int futex_atomic_cmpxchg_pt(int __user *uaddr, int oldval, int newval)
 {
         int ret;
 
+        if (!current->mm)
+                return -EFAULT;
         spin_lock(&current->mm->page_table_lock);
         uaddr = (int __user *) __dat_user_addr((unsigned long) uaddr);
         if (!uaddr) {