On Sun, Sep 02, 2018 at 10:32:22AM -0700, Nadav Amit wrote:
> +void __init poking_init(void)
> +{
> + unsigned long poking_addr;
> +
> + poking_mm = copy_init_mm();
> + if (!poking_mm) {
> + pr_err("x86/mm: error setting a separate poking address space");
> + return;
> + }
> +
> + /*
> + * Randomize the poking address, but make sure that the following page
> + * will be mapped at the same PMD. We need 2 pages, so find space for 3,
> + * and adjust the address if the PMD ends after the first one.
> + */
> + poking_addr = TASK_UNMAPPED_BASE +
> + (kaslr_get_random_long("Poking") & PAGE_MASK) %
> + (TASK_SIZE - TASK_UNMAPPED_BASE - 3 * PAGE_SIZE);
> +
> + if (((poking_addr + PAGE_SIZE) & ~PMD_MASK) == 0)
> + poking_addr += PAGE_SIZE;
> +}
This fails to compile for me.. I don't have kaslr_get_random_long().
