[PATCH v2] task_work: kasan: record task_work_add() call stack

[Oleg Nesterov]

On 03/16, Walter Wu wrote:
>
> --- a/kernel/task_work.c
> +++ b/kernel/task_work.c
> @@ -34,6 +34,9 @@ int task_work_add(struct task_struct *task, struct callback_head *work,
>  {
>  	struct callback_head *head;
>
> +	/* record the work call stack in order to print it in KASAN reports */
> +	kasan_record_aux_stack(work);
> +
>  	do {
>  		head = READ_ONCE(task->task_works);
>  		if (unlikely(head == &work_exited))

Acked-by: Oleg Nesterov <oleg at redhat.com>