On Wed, 9 Oct 2019 22:36:38 -0400
Steven Rostedt <[email protected]> wrote:
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -2029,6 +2029,37 @@ static void module_enable_nx(const struct module *mod)
> frob_writable_data(&mod->init_layout, set_memory_nx);
> }
>
Also, if you are worried about these being used anywhere else, we can
add:
> +void set_module_text_rw(const struct module *mod)
> +{
> + if (!rodata_enabled)
> + return;
> +
> + mutex_lock(&module_mutex);
> + if (mod->state == MODULE_STATE_UNFORMED)
if (mod->state == MODULE_STATE_UNFORMED ||
mod->state == MODULE_STATE_LIVE)
As this will keep it from being used on modules that are executing.
-- Steve
> + goto out;
> +
> + frob_text(&mod->core_layout, set_memory_rw);
> + frob_text(&mod->init_layout, set_memory_rw);
> +out:
> + mutex_unlock(&module_mutex);
> +}
> +
> +void set_module_text_ro(const struct module *mod)
> +{
> + if (!rodata_enabled)
> + return;
> +
> + mutex_lock(&module_mutex);
> + if (mod->state == MODULE_STATE_UNFORMED ||
> + mod->state == MODULE_STATE_GOING)
> + goto out;
> +
> + frob_text(&mod->core_layout, set_memory_ro);
> + frob_text(&mod->init_layout, set_memory_ro);
> +out:
> + mutex_unlock(&module_mutex);
> +}
> +
