diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index deb1bf7f5aa7c9950b0c01e6e7b2ed4bb4bafd1f..ee7eada5b0164b88105a2dfe1951a25399131845 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -167,7 +167,8 @@ static inline bool in_vfork(struct task_struct *tsk)
 	 * another oom-unkillable task does this it should blame itself.
 	 */
 	rcu_read_lock();
-	ret = tsk->vfork_done && tsk->real_parent->mm == tsk->mm;
+	ret = tsk->vfork_done &&
+			rcu_dereference(tsk->real_parent)->mm == tsk->mm;
 	rcu_read_unlock();
 
 	return ret;