1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LKDTM_H 3 #define __LKDTM_H 4 5 #define pr_fmt(fmt) "lkdtm: " fmt 6 7 #include <linux/kernel.h> 8 9 extern char *lkdtm_kernel_info; 10 11 #define pr_expected_config(kconfig) \ 12 do { \ 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 MODULE 22 int lkdtm_check_bool_cmdline(const char *param); 23 #define pr_expected_config_param(kconfig, param) \ 24 do { \ 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 #else 57 #define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig) 58 #endif 59 60 /* Crash types. */ 61 struct 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. */ 73 struct crashtype_category { 74 struct crashtype *crashtypes; 75 size_t len; 76 }; 77 78 /* Each category's crashtypes list. */ 79 extern struct crashtype_category bugs_crashtypes; 80 extern struct crashtype_category heap_crashtypes; 81 extern struct crashtype_category perms_crashtypes; 82 extern struct crashtype_category refcount_crashtypes; 83 extern struct crashtype_category usercopy_crashtypes; 84 extern struct crashtype_category stackleak_crashtypes; 85 extern struct crashtype_category cfi_crashtypes; 86 extern struct crashtype_category fortify_crashtypes; 87 extern struct crashtype_category powerpc_crashtypes; 88 89 /* Each category's init/exit routines. */ 90 void __init lkdtm_bugs_init(int *recur_param); 91 void __init lkdtm_heap_init(void); 92 void __exit lkdtm_heap_exit(void); 93 void __init lkdtm_perms_init(void); 94 void __init lkdtm_usercopy_init(void); 95 void __exit lkdtm_usercopy_exit(void); 96 97 /* Special declaration for function-in-rodata. */ 98 void lkdtm_rodata_do_nothing(void); 99 100 #endif 101