---

yaml
---
r: 84663
b: refs/heads/master
c: d12619b
h: refs/heads/master
i:
  84661: 45917d6
  84659: a75f8f7
  84655: ba55246
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 430c623121ea88ca80595c99fdc63b7f8a803ae5
+refs/heads/master: d12619b5ff5664623524aef796514d1946ea3b4a

trunk/include/linux/signal.h

@@ -241,6 +241,7 @@ extern int show_unhandled_signals;
 
 struct pt_regs;
 extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);
+extern void exit_signals(struct task_struct *tsk);
 
 extern struct kmem_cache *sighand_cachep;
 

trunk/kernel/exit.c

@@ -947,7 +947,7 @@ fastcall NORET_TYPE void do_exit(long code)
 		schedule();
 	}
 
-	tsk->flags |= PF_EXITING;
+	exit_signals(tsk);  /* sets PF_EXITING */
 	/*
 	 * tsk->flags are checked in the futex code to protect against
 	 * an exiting task cleaning up the robust pi futexes.

trunk/kernel/signal.c

@@ -1739,7 +1739,7 @@ static int do_signal_stop(int signr)
 			 * stop is always done with the siglock held,
 			 * so this check has no races.
 			 */
-			if (!t->exit_state &&
+			if (!(t->flags & PF_EXITING) &&
 			    !task_is_stopped_or_traced(t)) {
 				stop_count++;
 				signal_wake_up(t, 0);
@@ -1900,6 +1900,31 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
 	return signr;
 }
 
+void exit_signals(struct task_struct *tsk)
+{
+	int group_stop = 0;
+
+	spin_lock_irq(&tsk->sighand->siglock);
+	if (unlikely(tsk->signal->group_stop_count) &&
+			!--tsk->signal->group_stop_count) {
+		tsk->signal->flags = SIGNAL_STOP_STOPPED;
+		group_stop = 1;
+	}
+
+	/*
+	 * From now this task is not visible for group-wide signals,
+	 * see wants_signal(), do_signal_stop().
+	 */
+	tsk->flags |= PF_EXITING;
+	spin_unlock_irq(&tsk->sighand->siglock);
+
+	if (unlikely(group_stop)) {
+		read_lock(&tasklist_lock);
+		do_notify_parent_cldstop(tsk, CLD_STOPPED);
+		read_unlock(&tasklist_lock);
+	}
+}
+
 EXPORT_SYMBOL(recalc_sigpending);
 EXPORT_SYMBOL_GPL(dequeue_signal);
 EXPORT_SYMBOL(flush_signals);