drivers/misc/lkdtm/lkdtm.h

   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