tracing: instance_rmdir() leaks ftrace_event_file->filter

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / exit.c

diff --git a/kernel/exit.c b/kernel/exit.c
index 1e77fc6..81b3d67 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -560,9 +560,6 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
                                struct list_head *dead)
 {
        list_move_tail(&p->sibling, &p->real_parent->children);
-
-       if (p->exit_state == EXIT_DEAD)
-               return;
        /*
         * If this is a threaded reparent there is no need to
         * notify anyone anything has happened.
@@ -570,9 +567,19 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
        if (same_thread_group(p->real_parent, father))
                return;
 
-       /* We don't want people slaying init.  */
+       /*
+        * We don't want people slaying init.
+        *
+        * Note: we do this even if it is EXIT_DEAD, wait_task_zombie()
+        * can change ->exit_state to EXIT_ZOMBIE. If this is the final
+        * state, do_notify_parent() was already called and ->exit_signal
+        * doesn't matter.
+        */
        p->exit_signal = SIGCHLD;
 
+       if (p->exit_state == EXIT_DEAD)
+               return;
+
        /* If it has exited notify the new parent about this child's death. */
        if (!p->ptrace &&
            p->exit_state == EXIT_ZOMBIE && thread_group_empty(p)) {
@@ -784,6 +791,8 @@ void do_exit(long code)
        exit_shm(tsk);
        exit_files(tsk);
        exit_fs(tsk);
+       if (group_dead)
+               disassociate_ctty(1);
        exit_task_namespaces(tsk);
        exit_task_work(tsk);
        check_stack_usage();
@@ -799,13 +808,9 @@ void do_exit(long code)
 
        cgroup_exit(tsk, 1);
 
-       if (group_dead)
-               disassociate_ctty(1);
-
        module_put(task_thread_info(tsk)->exec_domain->module);
 
        proc_exit_connector(tsk);
-
        /*
         * FIXME: do that only when needed, using sched_exit tracepoint
         */