diff --git a/fs/exec.c b/fs/exec.c
index 007d0d8..2c942e2 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -841,8 +841,8 @@
 		 */
 		tsk->start_time = leader->start_time;
 
-		BUG_ON(leader->tgid != tsk->tgid);
-		BUG_ON(tsk->pid == tsk->tgid);
+		BUG_ON(!same_thread_group(leader, tsk));
+		BUG_ON(has_group_leader_pid(tsk));
 		/*
 		 * An exec() starts a new thread group with the
 		 * TGID of the previous thread group. Rehash the