3 files changed, 37 insertions, 0 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 3c2ba7ce11d4..9448f1b50b4a 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -860,6 +860,7 @@ static int de_thread(struct task_struct *tsk)
 
 no_thread_group:
         exit_itimers(sig);
+        flush_itimer_signals();
         if (leader)
                 release_task(leader);
 
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5395a6176f4b..3e05e5474749 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1848,7 +1848,9 @@ extern void exit_thread(void);
 extern void exit_files(struct task_struct *);
 extern void __cleanup_signal(struct signal_struct *);
 extern void __cleanup_sighand(struct sighand_struct *);
+
 extern void exit_itimers(struct signal_struct *);
+extern void flush_itimer_signals(void);
 
 extern NORET_TYPE void do_group_exit(int);
 
diff --git a/kernel/signal.c b/kernel/signal.c
index 2955f6c4f36e..6c0958e52ea7 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -231,6 +231,40 @@ void flush_signals(struct task_struct *t)
         spin_unlock_irqrestore(&t->sighand->siglock, flags);
 }
 
+static void __flush_itimer_signals(struct sigpending *pending)
+{
+        sigset_t signal, retain;
+        struct sigqueue *q, *n;
+
+        signal = pending->signal;
+        sigemptyset(&retain);
+
+        list_for_each_entry_safe(q, n, &pending->list, list) {
+                int sig = q->info.si_signo;
+
+                if (likely(q->info.si_code != SI_TIMER)) {
+                        sigaddset(&retain, sig);
+                } else {
+                        sigdelset(&signal, sig);
+                        list_del_init(&q->list);
+                        __sigqueue_free(q);
+                }
+        }
+
+        sigorsets(&pending->signal, &signal, &retain);
+}
+
+void flush_itimer_signals(void)
+{
+        struct task_struct *tsk = current;
+        unsigned long flags;
+
+        spin_lock_irqsave(&tsk->sighand->siglock, flags);
+        __flush_itimer_signals(&tsk->pending);
+        __flush_itimer_signals(&tsk->signal->shared_pending);
+        spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
+}
+
 void ignore_signals(struct task_struct *t)
 {
         int i;