diff --git a/mm/fremap.c b/mm/fremap.c
index 7b7f852..ec520c7 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -141,6 +141,10 @@
 	if (start + size <= start)
 		return err;
 
+	/* Does pgoff wrap? */
+	if (pgoff + (size >> PAGE_SHIFT) < pgoff)
+		return err;
+
 	/* Can we represent this offset inside this architecture's pte's? */
 #if PTE_FILE_MAX_BITS < BITS_PER_LONG
 	if (pgoff + (size >> PAGE_SHIFT) >= (1UL << PTE_FILE_MAX_BITS))