1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c
index f61ee67ec00..677b1ed184c 100644
--- a/arch/x86/lib/usercopy.c
+++ b/arch/x86/lib/usercopy.c
@@ -8,6 +8,7 @@
 #include <linux/module.h>
 
 #include <asm/word-at-a-time.h>
+#include <linux/sched.h>
 
 /*
  * best effort, GUP based copy_from_user() that is NMI-safe
@@ -21,6 +22,9 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
         void *map;
         int ret;
 
+        if (__range_not_ok(from, n, TASK_SIZE) == 0)
+                return len;
+
         do {
                 ret = __get_user_pages_fast(addr, 1, 0, &page);
                 if (!ret)