1 files changed, 2 insertions, 0 deletions

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 290fb5bf0440..3cec080faa23 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1730,10 +1730,12 @@ struct mempolicy *__mpol_dup(struct mempolicy *old)
 
         if (!new)
                 return ERR_PTR(-ENOMEM);
+        rcu_read_lock();
         if (current_cpuset_is_being_rebound()) {
                 nodemask_t mems = cpuset_mems_allowed(current);
                 mpol_rebind_policy(old, &mems);
         }
+        rcu_read_unlock();
         *new = *old;
         atomic_set(&new->refcnt, 1);
         return new;