101 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __LKDTM_H3#define __LKDTM_H4 5#define pr_fmt(fmt) "lkdtm: " fmt6 7#include <linux/kernel.h>8 9extern char *lkdtm_kernel_info;10 11#define pr_expected_config(kconfig) \12do { \13 if (IS_ENABLED(kconfig)) \14 pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \15 lkdtm_kernel_info); \16 else \17 pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \18 lkdtm_kernel_info); \19} while (0)20 21#ifndef MODULE22int lkdtm_check_bool_cmdline(const char *param);23#define pr_expected_config_param(kconfig, param) \24do { \25 if (IS_ENABLED(kconfig)) { \26 switch (lkdtm_check_bool_cmdline(param)) { \27 case 0: \28 pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \29 lkdtm_kernel_info); \30 break; \31 case 1: \32 pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \33 lkdtm_kernel_info); \34 break; \35 default: \36 pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \37 lkdtm_kernel_info); \38 } \39 } else { \40 switch (lkdtm_check_bool_cmdline(param)) { \41 case 0: \42 pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \43 lkdtm_kernel_info); \44 break; \45 case 1: \46 pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \47 lkdtm_kernel_info); \48 break; \49 default: \50 pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \51 lkdtm_kernel_info); \52 break; \53 } \54 } \55} while (0)56#else57#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)58#endif59 60/* Crash types. */61struct crashtype {62 const char *name;63 void (*func)(void);64};65 66#define CRASHTYPE(_name) \67 { \68 .name = __stringify(_name), \69 .func = lkdtm_ ## _name, \70 }71 72/* Category's collection of crashtypes. */73struct crashtype_category {74 struct crashtype *crashtypes;75 size_t len;76};77 78/* Each category's crashtypes list. */79extern struct crashtype_category bugs_crashtypes;80extern struct crashtype_category heap_crashtypes;81extern struct crashtype_category perms_crashtypes;82extern struct crashtype_category refcount_crashtypes;83extern struct crashtype_category usercopy_crashtypes;84extern struct crashtype_category stackleak_crashtypes;85extern struct crashtype_category cfi_crashtypes;86extern struct crashtype_category fortify_crashtypes;87extern struct crashtype_category powerpc_crashtypes;88 89/* Each category's init/exit routines. */90void __init lkdtm_bugs_init(int *recur_param);91void __init lkdtm_heap_init(void);92void __exit lkdtm_heap_exit(void);93void __init lkdtm_perms_init(void);94void __init lkdtm_usercopy_init(void);95void __exit lkdtm_usercopy_exit(void);96 97/* Special declaration for function-in-rodata. */98void lkdtm_rodata_do_nothing(void);99 100#endif101