diff options
| -rw-r--r-- | include/linux/signal.h | 1 | ||||
| -rw-r--r-- | kernel/exit.c | 2 | ||||
| -rw-r--r-- | kernel/signal.c | 27 |
3 files changed, 28 insertions, 2 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h index 7e095147656c..42d2e0a948f4 100644 --- a/include/linux/signal.h +++ b/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; diff --git a/kernel/exit.c b/kernel/exit.c index d7815f570882..8f3bf53a5b4d 100644 --- a/kernel/exit.c +++ b/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. diff --git a/kernel/signal.c b/kernel/signal.c index 3fca710a5cd7..209eec11eef5 100644 --- a/kernel/signal.c +++ b/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 @@ relock: 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); |