exit: Stop poorly open coding do_task_dead in make_task_dead

When the kernel detects it is oops or otherwise force killing a task
while it exits the code poorly attempts to permanently stop the task
from scheduling.

I say poorly because it is possible for a task in TASK_UINTERRUPTIBLE
to be woken up.

As it makes no sense for the task to continue call do_task_dead
instead which actually does the work and permanently removes the task
from the scheduler.  Guaranteeing the task will never be woken
up again.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

diff --git a/kernel/exit.c b/kernel/exit.c
index d0ec6f6..f975cd8 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -886,8 +886,7 @@ void __noreturn make_task_dead(int signr)
        if (unlikely(tsk->flags & PF_EXITING)) {
                pr_alert("Fixing recursive fault but reboot is needed!\n");
                futex_exit_recursive(tsk);
-               set_current_state(TASK_UNINTERRUPTIBLE);
-               schedule();
+               do_task_dead();
        }
 
        do_exit(signr);