On Sun, Oct 01, 2017 at 11:06:44AM +1100, Tobin C. Harding wrote: > Version 2 of Greg's patch series with changes made as suggested by comments > to V1.
Patch set tested by setting /proc/sys/kernel/kptr_restrict and inserting the following module #include <linux/init.h> #include <linux/module.h> #define DRIVER_AUTHOR "Tobin C. Harding <m...@tobin.cc>" #define DRIVER_DESC "Testing module" static void test_printk(void) { char *ptr = ""; pr_alert("printing with p: %p\n", ptr); pr_alert("printing with pK: %pK\n", ptr); pr_alert("printing with pP: %pP\n", ptr); pr_alert("printing with pa: %pa\n", ptr); pr_alert("printing with pad: %pad\n", ptr); pr_alert("printing with pap: %pap\n", ptr); pr_alert("printing with paP: %paP\n", ptr); pr_alert("printing with padP: %padP\n", ptr); pr_alert("printing with papP: %papP\n", ptr); pr_alert("printing with pr: %pr\n", ptr); pr_alert("printing with pR: %pR\n", ptr); } static int hello_init(void) { pr_alert("Hello, world\n"); test_printk(); return 0; } module_init(hello_init); static void hello_exit(void) { pr_alert("Goodbye, world\n"); } module_exit(hello_exit); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL");