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exit: Stop poorly open coding do_task_dead in make_task_dead

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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>
This commit is contained in:
Eric W. Biederman 2021-11-22 09:51:03 -06:00
parent 05ea0424f0
commit 7f80a2fd7d
1 changed files with 1 additions and 2 deletions
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3
kernel/exit.c
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@ -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);