diff --git a/fs/exec.c b/fs/exec.c
index f7aabfeca0331fa0b09b16d28a4931af95b7c29a..54135df2a9662cbf1f222ee468067812f52e1f72 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -751,7 +751,7 @@ static int de_thread(struct task_struct *tsk)
 
 		write_lock_irq(&tasklist_lock);
 		spin_lock(&oldsighand->siglock);
-		spin_lock(&newsighand->siglock);
+		spin_lock_nested(&newsighand->siglock, SINGLE_DEPTH_NESTING);
 
 		rcu_assign_pointer(current->sighand, newsighand);
 		recalc_sigpending();