diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 1d1e23cbb0..1ce74c5bfe 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -3635,6 +3635,8 @@ static int _cache_flush(gnttab_cache_flush_t *cflush, grant_ref_t *cur_ref)
     owner = page_get_owner_and_reference(page);
     if ( !owner || !owner->grant_table )
     {
+        if ( owner )
+            put_page(page);
         rcu_unlock_domain(d);
         return -EPERM;
     }