1 files changed, 6 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 1c9dc46da3db..a54b2c498444 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2561,6 +2561,12 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
         lock_page(page);
         delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
 
+        page = ksm_might_need_to_copy(page, vma, address);
+        if (!page) {
+                ret = VM_FAULT_OOM;
+                goto out;
+        }
+
         if (mem_cgroup_try_charge_swapin(mm, page, GFP_KERNEL, &ptr)) {
                 ret = VM_FAULT_OOM;
                 goto out_page;