From 7f80a2fd7db9a55894fd841915236aca611291b5 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 22 Nov 2021 09:51:03 -0600 Subject: [PATCH] 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" --- kernel/exit.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index d0ec6f6..f975cd8 100644 --- 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); -- 2.7.4